WorldWideScience

Sample records for based performance evaluation

  1. Performance-Based Evaluation and School Librarians

    Science.gov (United States)

    Church, Audrey P.

    2015-01-01

    Evaluation of instructional personnel is standard procedure in our Pre-K-12 public schools, and its purpose is to document educator effectiveness. With Race to the Top and No Child Left Behind waivers, states are required to implement performance-based evaluations that demonstrate student academic progress. This three-year study describes the…

  2. Performance Evaluation of Triangulation Based Range Sensors

    Directory of Open Access Journals (Sweden)

    Monica Bordegoni

    2010-07-01

    Full Text Available The performance of 2D digital imaging systems depends on several factors related with both optical and electronic processing. These concepts have originated standards, which have been conceived for photographic equipment and bi-dimensional scanning systems, and which have been aimed at estimating different parameters such as resolution, noise or dynamic range. Conversely, no standard test protocols currently exist for evaluating the corresponding performances of 3D imaging systems such as laser scanners or pattern projection range cameras. This paper is focused on investigating experimental processes for evaluating some critical parameters of 3D equipment, by extending the concepts defined by the ISO standards to the 3D domain. The experimental part of this work concerns the characterization of different range sensors through the extraction of their resolution, accuracy and uncertainty from sets of 3D data acquisitions of specifically designed test objects whose geometrical characteristics are known in advance. The major objective of this contribution is to suggest an easy characterization process for generating a reliable comparison between the performances of different range sensors and to check if a specific piece of equipment is compliant with the expected characteristics.

  3. Team Primacy Concept (TPC) Based Employee Evaluation and Job Performance

    Science.gov (United States)

    Muniute, Eivina I.; Alfred, Mary V.

    2007-01-01

    This qualitative study explored how employees learn from Team Primacy Concept (TPC) based employee evaluation and how they use the feedback in performing their jobs. TPC based evaluation is a form of multirater evaluation, during which the employee's performance is discussed by one's peers in a face-to-face team setting. The study used Kolb's…

  4. Port performance evaluation tool based on microsimulation model

    Directory of Open Access Journals (Sweden)

    Tsavalista Burhani Jzolanda

    2017-01-01

    Full Text Available As port performance is becoming correlative to national competitiveness, the issue of port performance evaluation has significantly raised. Port performances can simply be indicated by port service levels to the ship (e.g., throughput, waiting for berthing etc., as well as the utilization level of equipment and facilities within a certain period. The performances evaluation then can be used as a tool to develop related policies for improving the port’s performance to be more effective and efficient. However, the evaluation is frequently conducted based on deterministic approach, which hardly captures the nature variations of port parameters. Therefore, this paper presents a stochastic microsimulation model for investigating the impacts of port parameter variations to the port performances. The variations are derived from actual data in order to provide more realistic results. The model is further developed using MATLAB and Simulink based on the queuing theory.

  5. A dynamic performance evaluation method based on SD-BSC

    Institute of Scientific and Technical Information of China (English)

    TENG Chun-xian; PAN Xiao-dong; HU Xian-wu

    2007-01-01

    Taking into consideration the disadvantage of Balanced Scorecard (BSC) not being able to reflect time delay, nonlinear problems of causal relationship and being lack of effective simulation, we combined it with the characteristics of the System Dynamics (SD). Basing on the background of manufacturing enterprises,through SD integrating with the BSC we established a new performance evaluation method-SD-BSC method to overcome the disadvantage of BSC. A performance evaluation model of SD-BSC is provided and the simulation results are analyzed which show different production policies will lead to different customer's satisfaction degrees. The SD-BSC dynamic performance evaluation method can reflect dynamic, complex causal feedback relationship and time delay, so it compensates for the disadvantage of traditional financial performance evaluation method, and at the same time makes the BSC perfect.

  6. Performance evaluation of sensor allocation algorithm based on covariance control

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    The covariance control capability of sensor allocation algorithms based on covariance control strategy is an important index to evaluate the performance of these algorithms. Owing to lack of standard performance metric indices to evaluate covariance control capability, sensor allocation ratio, etc, there are no guides to follow in the design procedure of sensor allocation algorithm in practical applications. To meet these demands, three quantified performance metric indices are presented, which are average covariance misadjustment quantity (ACMQ), average sensor allocation ratio (ASAR) and matrix metric influence factor (MMIF), where ACMQ, ASAR and MMIF quantify the covariance control capability, the usage of sensor resources and the robustness of sensor allocation algorithm, respectively. Meanwhile, a covariance adaptive sensor allocation algorithm based on a new objective function is proposed to improve the covariance control capability of the algorithm based on information gain. The experiment results show that the proposed algorithm have the advantage over the preceding sensor allocation algorithm in covariance control capability and robustness.

  7. Tools for evaluating team performance in simulation-based training.

    Science.gov (United States)

    Rosen, Michael A; Weaver, Sallie J; Lazzara, Elizabeth H; Salas, Eduardo; Wu, Teresa; Silvestri, Salvatore; Schiebel, Nicola; Almeida, Sandra; King, Heidi B

    2010-10-01

    Teamwork training constitutes one of the core approaches for moving healthcare systems toward increased levels of quality and safety, and simulation provides a powerful method of delivering this training, especially for face-paced and dynamic specialty areas such as Emergency Medicine. Team performance measurement and evaluation plays an integral role in ensuring that simulation-based training for teams (SBTT) is systematic and effective. However, this component of SBTT systems is overlooked frequently. This article addresses this gap by providing a review and practical introduction to the process of developing and implementing evaluation systems in SBTT. First, an overview of team performance evaluation is provided. Second, best practices for measuring team performance in simulation are reviewed. Third, some of the prominent measurement tools in the literature are summarized and discussed relative to the best practices. Subsequently, implications of the review are discussed for the practice of training teamwork in Emergency Medicine.

  8. Performance-based concept on seismic evaluation of existing bridges

    Institute of Scientific and Technical Information of China (English)

    Yu-Chi Sung; Wen-I Liao; W.Phillip Yen

    2009-01-01

    Conventional seismic evaluation of existing bridges explores the ability of a bridge to survive under significant earthquake excitations. This approach has several major drawbacks, such as only a single structural performance of near collapse is considered, and the simplified approach of adopting strength-based concept to indirectly estimate the nonlinear behavior of a structure lacks accuracy. As a result, performance-based concepts that include a wider variety of structural performance states of a given bridge excited by different levels of earthquake intensity is needed by the engineering community. This paper introduces an improved process for the seismic evaluation of existing bridges. The relationship between the overall structural performance and earthquakes with varying levels of peak ground acceleration (PGA) can successfully be linked. A universal perspective on the seismic evaluation of bridges over their entire life-cycle can be easily obtained to investigate multiple performance objectives. The accuracy of the proposed method, based on pushover analysis, is proven in a case study that compares the results from the proposed procedure with additional nonlinear time history analyses.

  9. Implementation and Performance Evaluation of IPSec VPN Based on Netfilter

    Institute of Scientific and Technical Information of China (English)

    ZHAO Da-yuan; JIANG Yi-xin; LIN Chuang; LI Yan-xi

    2005-01-01

    We mainly explore two problems when combining IPSec module into TCP/IP stack by porting the famous IPSec software (FreeS/WAN) into a security gateway. One is how to implement the IPSec module based on Netfilter in Linux 2.4. x kernel. The other problem is the performance evaluation. We test the throughput of our security gateway before and after applying IPSec with different encryption/decryption algorithms, including the software-based and hardware-based method. With these testing data, we analyze further system performance bottleneck. In the end, we also infer the quantitative relation between the system throughput and the speed of encryption/decryption algorithm and propose some valuable conclusions for improving performance.

  10. MODEL-BASED PERFORMANCE EVALUATION APPROACH FOR MOBILE AGENT SYSTEMS

    Institute of Scientific and Technical Information of China (English)

    Li Xin; Mi Zhengkun; Meng Xudong

    2004-01-01

    Claimed as the next generation programming paradigm, mobile agent technology has attracted extensive interests in recent years. However, up to now, limited research efforts have been devoted to the performance study of mobile agent system and most of these researches focus on agent behavior analysis resulting in that models are hard to apply to mobile agent systems. To bridge the gap, a new performance evaluation model derived from operation mechanisms of mobile agent platforms is proposed. Details are discussed for the design of companion simulation software, which can provide the system performance such as response time of platform to mobile agent. Further investigation is followed on the determination of model parameters. Finally comparison is made between the model-based simulation results and measurement-based real performance of mobile agent systems. The results show that the proposed model and designed software are effective in evaluating performance characteristics of mobile agent systems. The proposed approach can also be considered as the basis of performance analysis for large systems composed of multiple mobile agent platforms.

  11. Performance Evaluation of Air-Based Heat Rejection Systems

    Directory of Open Access Journals (Sweden)

    Hannes Fugmann

    2015-01-01

    Full Text Available On the basis of the Number of Transfer Units (NTU method a functional relation between electric power for fans/pumps and effectiveness in dry coolers and wet cooling towers is developed. Based on this relation, a graphical presentation method of monitoring and simulation data of heat rejection units is introduced. The functional relation allows evaluating the thermodynamic performance of differently sized heat rejection units and comparing performance among them. The method is used to evaluate monitoring data of dry coolers of different solar cooling field projects. The novelty of this approach is that performance rating is not limited by a design point or standardized operating conditions of the heat exchanger, but is realizable under flexible conditions.

  12. Performance Evaluation of Image Fusion Based on Discrete Cosine Transform

    Directory of Open Access Journals (Sweden)

    Ramkrishna Patil

    2013-05-01

    Full Text Available Discrete cosine transform (DCT is used for fusion of two different images and for image compression. Image fusion deals with creating an image by combining portions from other images to obtain an image in which all of the objects are in focus. Two multi focus images are used for image fusion. Different fusion algorithms are used and their performance is evaluated using evaluation metrics such as PSNR, SSIM, Spatial Frequency, Quality Index, Structural Content, Mean Absolute Error. Fusion performance is not good while using the algorithms with block size less than 64x64 and also the block size of 512x512. Contrast, amplitude and energy based image fusion algorithms performed well. The fused images are comparable with the reference image. Only the image size is considered but blurring percentage is not considered. These algorithms are very simple and might be suitable for real time applications

  13. Towards Reliable Evaluation of Anomaly-Based Intrusion Detection Performance

    Science.gov (United States)

    Viswanathan, Arun

    2012-01-01

    This report describes the results of research into the effects of environment-induced noise on the evaluation process for anomaly detectors in the cyber security domain. This research was conducted during a 10-week summer internship program from the 19th of August, 2012 to the 23rd of August, 2012 at the Jet Propulsion Laboratory in Pasadena, California. The research performed lies within the larger context of the Los Angeles Department of Water and Power (LADWP) Smart Grid cyber security project, a Department of Energy (DoE) funded effort involving the Jet Propulsion Laboratory, California Institute of Technology and the University of Southern California/ Information Sciences Institute. The results of the present effort constitute an important contribution towards building more rigorous evaluation paradigms for anomaly-based intrusion detectors in complex cyber physical systems such as the Smart Grid. Anomaly detection is a key strategy for cyber intrusion detection and operates by identifying deviations from profiles of nominal behavior and are thus conceptually appealing for detecting "novel" attacks. Evaluating the performance of such a detector requires assessing: (a) how well it captures the model of nominal behavior, and (b) how well it detects attacks (deviations from normality). Current evaluation methods produce results that give insufficient insight into the operation of a detector, inevitably resulting in a significantly poor characterization of a detectors performance. In this work, we first describe a preliminary taxonomy of key evaluation constructs that are necessary for establishing rigor in the evaluation regime of an anomaly detector. We then focus on clarifying the impact of the operational environment on the manifestation of attacks in monitored data. We show how dynamic and evolving environments can introduce high variability into the data stream perturbing detector performance. Prior research has focused on understanding the impact of this

  14. Measurement-Based Performance Evaluation of Advanced MIMO Transceiver Designs

    Science.gov (United States)

    Trautwein, Uwe; Schneider, Christian; Thomä, Reiner

    2005-12-01

    This paper describes the methodology and the results of performance investigations on a multiple-input multiple-output (MIMO) transceiver scheme for frequency-selective radio channels. The method relies on offline simulations and employs real-time MIMO channel sounder measurement data to ensure a realistic channel modeling. Thus it can be classified in between the performance evaluation using some predefined channel models and the evaluation of a prototype hardware in field experiments. New aspects for the simulation setup are discussed, which are frequently ignored when using simpler model-based evaluations. Example simulations are provided for an iterative ("turbo") MIMO equalizer concept. The dependency of the achievable bit error rate performance on the propagation characteristics and on the variation in some system design parameters is shown, whereas the antenna constellation is of particular concern for MIMO systems. Although in many of the considered constellations turbo MIMO equalization appears feasible in real field scenarios, there exist cases with poor performance as well, indicating that in practical applications link adaptation of the transmitter and receiver processing to the environment is necessary.

  15. Measurement-Based Performance Evaluation of Advanced MIMO Transceiver Designs

    Directory of Open Access Journals (Sweden)

    Schneider Christian

    2005-01-01

    Full Text Available This paper describes the methodology and the results of performance investigations on a multiple-input multiple-output (MIMO transceiver scheme for frequency-selective radio channels. The method relies on offline simulations and employs real-time MIMO channel sounder measurement data to ensure a realistic channel modeling. Thus it can be classified in between the performance evaluation using some predefined channel models and the evaluation of a prototype hardware in field experiments. New aspects for the simulation setup are discussed, which are frequently ignored when using simpler model-based evaluations. Example simulations are provided for an iterative ("turbo" MIMO equalizer concept. The dependency of the achievable bit error rate performance on the propagation characteristics and on the variation in some system design parameters is shown, whereas the antenna constellation is of particular concern for MIMO systems. Although in many of the considered constellations turbo MIMO equalization appears feasible in real field scenarios, there exist cases with poor performance as well, indicating that in practical applications link adaptation of the transmitter and receiver processing to the environment is necessary.

  16. Competency-Based Performance Appraisals: Improving Performance Evaluations of School Nutrition Managers and Assistants/Technicians

    Science.gov (United States)

    Cross, Evelina W.; Asperin, Amelia Estepa; Nettles, Mary Frances

    2009-01-01

    Purpose: The purpose of the research was to develop a competency-based performance appraisal resource for evaluating school nutrition (SN) managers and assistants/technicians. Methods: A two-phased process was used to develop the competency-based performance appraisal resource for SN managers and assistants/technicians. In Phase I, draft…

  17. Performance Evaluation of Java Based Object Relational Mapping Tools

    Directory of Open Access Journals (Sweden)

    Shoaib Mahmood Bhatti

    2013-04-01

    Full Text Available Object persistency is the hot issue in the form of ORM (Object Relational Mapping tools in industry as developers use these tools during software development. This paper presents the performance evaluation of Java based ORM tools. For this purpose, Hibernate, Ebean and TopLinkhave been selected as the ORM tools which are popular and open source. Their performance has been measured from execution point of view. The results show that ORM tools are the good option for the developers considering the system throughput in shorter setbacks and they can be used efficiently and effectively for performing mapping of the objects into the relational dominated world of database, thus creating a hope for a better and well dominated future of this technology.

  18. Performance Evaluation of a Biometric System Based on Acoustic Images

    Directory of Open Access Journals (Sweden)

    Juan J. Villacorta

    2011-10-01

    Full Text Available An acoustic electronic scanning array for acquiring images from a person using a biometric application is developed. Based on pulse-echo techniques, multifrequency acoustic images are obtained for a set of positions of a person (front, front with arms outstretched, back and side. Two Uniform Linear Arrays (ULA with 15 l/2-equispaced sensors have been employed, using different spatial apertures in order to reduce sidelobe levels. Working frequencies have been designed on the basis of the main lobe width, the grating lobe levels and the frequency responses of people and sensors. For a case-study with 10 people, the acoustic profiles, formed by all images acquired, are evaluated and compared in a mean square error sense. Finally, system performance, using False Match Rate (FMR/False Non-Match Rate (FNMR parameters and the Receiver Operating Characteristic (ROC curve, is evaluated. On the basis of the obtained results, this system could be used for biometric applications.

  19. Performance Evaluation Based on EFQM Excellence Model in Sport Organizations

    Directory of Open Access Journals (Sweden)

    Rasoul Faraji

    2012-06-01

    Full Text Available The present study aims to evaluate the performance of physical education (P.E. general office of Tehran province through model of European Foundation for Quality Management (EFQM. Questionnaire approach was used in this study. Therefore validity of the 50-item EFQM questionnaire verified by the experts and the reliability also calculated in a pilot study (α=0.928. 95 questionnaires distributed between subjects (N=n and 80 questionnaires returned and concluded in the statistical analysis. From nine EFQM criteria, the highest scores were gained in key performance results (37.62% and the lowest gained in people results (27.94%. Totally, this organization achieved 337.11 pointes out of a total of 1000. Additionally, there was a strong relationship (r=0.827, p=0.001 between enablers and results (P<0.05. Based on scores gained in the criteria, improving measures in all criteria is essential for this organization, especially in the people criterion from enablers and people results criterion from results domain. Furthermore, it is believed that the physical education area is one of the best fields for application of the excellence model towards the performance excellence and gaining better results and hence, it seems that the model has a high potential in responding to problems commonly seen in sport sector.

  20. Bidirectional MIMO Channel Tracking Based on PASTd and Performance Evaluation

    Science.gov (United States)

    Ehrenberg, Livnat; Gannot (Eurasipmember), Sharon; Shayevitz, Ofer; Leshem, Amir; Zehavi, Ephraim

    2010-12-01

    We consider a bidirectional time division duplex (TDD) multiple-input multiple-output (MIMO) communication system with time-varying channel and additive white Gaussian noise (AWGN). A blind bidirectional channel tracking algorithm, based on the projection approximation subspace tracking (PAST) algorithm, is applied in both terminals. The resulting singular value decomposition (SVD) of the channel matrix is then used to approximately diagonalize the channel. The proposed method is applied to an orthogonal frequency-division multiplexing-(OFDM-)MIMO setting with a typical indoor time-domain reflection model. The computational cost of the proposed algorithm, compared with other state-of-the-art algorithms, is relatively small. The Kalman filter is utilized for establishing a benchmark for the obtained performance of the proposed tracking algorithm. The performance degradation relative to a full channel state information (CSI) due to the application of the tracking algorithm is evaluated in terms of average effective rate and the outage probability and compared with alternative tracking algorithms. The obtained results are also compared with a benchmark obtained by the Kalman filter with known input signal and channel characteristics. It is shown that the expected degradation in performance of frequency-domain algorithms (which do not exploit the smooth frequency response of the channel) is only minor compared with time-domain algorithms in a range of reasonable signal-to-noise ratio (SNR) levels. The proposed bidirectional frequency-domain tracking algorithm, proposed in this paper, is shown to attain communication rates close to the benchmark and to outperform a competing algorithm. The paper is concluded by evaluating the proposed blind tracking method in terms of the outage probability and the symbol error rate (SER) versus. SNR for binary phase shift keying (BPSK) and 4-Quadrature amplitude modulation (QAM) constellations.

  1. Bidirectional MIMO Channel Tracking Based on PASTd and Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Shayevitz Ofer

    2010-01-01

    Full Text Available Abstract We consider a bidirectional time division duplex (TDD multiple-input multiple-output (MIMO communication system with time-varying channel and additive white Gaussian noise (AWGN. A blind bidirectional channel tracking algorithm, based on the projection approximation subspace tracking (PAST algorithm, is applied in both terminals. The resulting singular value decomposition (SVD of the channel matrix is then used to approximately diagonalize the channel. The proposed method is applied to an orthogonal frequency-division multiplexing-(OFDM-MIMO setting with a typical indoor time-domain reflection model. The computational cost of the proposed algorithm, compared with other state-of-the-art algorithms, is relatively small. The Kalman filter is utilized for establishing a benchmark for the obtained performance of the proposed tracking algorithm. The performance degradation relative to a full channel state information (CSI due to the application of the tracking algorithm is evaluated in terms of average effective rate and the outage probability and compared with alternative tracking algorithms. The obtained results are also compared with a benchmark obtained by the Kalman filter with known input signal and channel characteristics. It is shown that the expected degradation in performance of frequency-domain algorithms (which do not exploit the smooth frequency response of the channel is only minor compared with time-domain algorithms in a range of reasonable signal-to-noise ratio (SNR levels. The proposed bidirectional frequency-domain tracking algorithm, proposed in this paper, is shown to attain communication rates close to the benchmark and to outperform a competing algorithm. The paper is concluded by evaluating the proposed blind tracking method in terms of the outage probability and the symbol error rate (SER versus. SNR for binary phase shift keying (BPSK and 4-Quadrature amplitude modulation (QAM constellations.

  2. Optimal contracts based on subjective performance evaluations and reciprocity

    DEFF Research Database (Denmark)

    Sebald, Alexander Christopher; Walzl, Markus

    2015-01-01

    are unaffected by the subjective performance appraisal. Hence, performance feedback which falls short of agents’ self- evaluations can be interpreted as an unkind act that triggers a negatively reciprocal response not only if the assessment determines agents’ earnings but also when it lacks monetary consequences...

  3. Performance Evaluation of Marine Industries Based on Eco-economy

    Directory of Open Access Journals (Sweden)

    Minli Gong

    2013-03-01

    Full Text Available An assessment framework is made to evaluate the performance factors of marine industries from the perspective of eco-economics by means of the AHP and the Delphi methods. Results are as follows: Performance assessment index of marine industries is decided by ecological performance, economic performance and social performance with ecological index taking priority over economic index; the efficiency of economy output and value-creating are preferred in the pursuit of low energy-consuming and less polluting marine industries; and in the near future, marine industries will make the greatest contribution to employment.

  4. Evaluating hydrological model performance using information theory-based metrics

    Science.gov (United States)

    The accuracy-based model performance metrics not necessarily reflect the qualitative correspondence between simulated and measured streamflow time series. The objective of this work was to use the information theory-based metrics to see whether they can be used as complementary tool for hydrologic m...

  5. 75 FR 32484 - Array-Based Cytogenetic Tests: Questions on Performance Evaluation, Result Reporting and...

    Science.gov (United States)

    2010-06-08

    ... Performance Evaluation, Result Reporting and Interpretation. The purpose of the public meeting is to seek input on challenges related to performance evaluation, determination of clinical significance, result... HUMAN SERVICES Food and Drug Administration Array-Based Cytogenetic Tests: Questions on...

  6. Performance Evaluation of Pedestrian Locations Based on Contemporary Smartphones

    Directory of Open Access Journals (Sweden)

    Jalal Ibrahim Al-Azizi

    2017-01-01

    Full Text Available Nowadays, a Global Navigation Satellite System (GNSS unit is embedded in nearly every smartphone. This unit allows a smartphone to detect the user’s location and motion, and it makes functions, such as navigation, tracking, and compass applications, available to the user. Therefore, the GNSS unit has become one of the most important features in modern smartphones. However, because most smartphones incorporate relatively low-cost GNSS chips, their localization accuracy varies depending on the number of accessible GNSS satellites, and it is highly dependent on environmental factors that cause interference such as forests and buildings. This research evaluated the performance of the GNSS units inside two different models of smartphones in determining pedestrian locations in different environments. The results indicate that the overall performances of the two devices were related directly to the environment, type of smartphone/GNSS chipset, and the application used to collect the information.

  7. Performance Evaluation of Wavelet Based on Human Visual System

    Institute of Scientific and Technical Information of China (English)

    胡海平; 莫玉龙

    2002-01-01

    We have constructed a compactly supported biorthogonal wavelet that approximates the modulation transfer function(MTF) of human visual system in the frequency domain.In this paper,we evaluate performance of the constructed wavelet,and compare it with the widely used Daubechies9-7,Daubechies 9-3 and GBCW-9-7 wavelets.The result shows that coding performance of the constructed wavelet is better than Daubechies9-3,and is competitive with Daubechies 9-7 and GBCW-9-7 wavelets.Like Dauechies 9-3 wavelet,the filter coefficients of the constructed waveklet are all dyadic fractions,and the tap is less than Daubechies 9-7 and GBOW 9-7,It has an attractive feature in the realization of discrete wavelet transform.

  8. Performance and evaluation of desiccant based air conditioning system.

    Directory of Open Access Journals (Sweden)

    Gaurav S. Wani

    2014-12-01

    Full Text Available This Project work presents study and experimental analysis of Desiccant based air conditioning system.The main purpose of this project is to increase the efficency of air conditioning system.In the convenstional air conditioning system cooling coli has two load latent load and sensible load. Cooling has to cool the air and simultaneously to dehumidify it.It increases load on cooling coil and affects performance to the system. To increase the efficiency the air conditioning system desiccant materials are used at the inlet of the air conditioning test rig. Desiccant materials attract moisture based on differences in vapor pressure. Due to their enormous affinity to absorb water and considerable ability to hold water. Due to use of desiccant material load on the cooling coil reduces since moisture is absorbed by desiccant; cooling coil has to take only sensible load. Analysis is done using different desiccant materials and based on the observation, power consumption before and after desiccant is calculated. From this conclusion is made that desiccant material improves the efficiency of air conditioning test rig

  9. Synthesis and Performance Evaluation of a Synthetic Based Foaming Agent

    Institute of Scientific and Technical Information of China (English)

    Barugahare J avilla; SHUI Zhong-he; CHEN Wei

    2015-01-01

    The aim of this study was to create a foaming agent and then evaluate its performance.This foaming agent is made up of Sodium lauryl sulfate,Ethanol,Lauryl alcohol and Water.On aeration,the diluted foaming solution produces a stable foam whose properties,density,capacity and drainage were studied.The compressive strength,water absorption and density of foamed concrete were also studied.Test results show that the initial foam density is 104 kg/m3 at an optimum dilu-tion ratio of 1:40.Foamed concrete’s density can vary from 450 kg/m3 to 1 950 bkg/m3 and its compressive strength is in 0.5~23 MPa.Compressive strength test results of this foaming agent are higher than those produced with EABASSOC foa-ming agent.According to ASTM 869-91,this chemical composition qualifies to be used as a foaming agent.

  10. Evaluating performances of simplified physically based models for landslide susceptibility

    Directory of Open Access Journals (Sweden)

    G. Formetta

    2015-12-01

    Full Text Available Rainfall induced shallow landslides cause loss of life and significant damages involving private and public properties, transportation system, etc. Prediction of shallow landslides susceptible locations is a complex task that involves many disciplines: hydrology, geotechnical science, geomorphology, and statistics. Usually to accomplish this task two main approaches are used: statistical or physically based model. Reliable models' applications involve: automatic parameters calibration, objective quantification of the quality of susceptibility maps, model sensitivity analysis. This paper presents a methodology to systemically and objectively calibrate, verify and compare different models and different models performances indicators in order to individuate and eventually select the models whose behaviors are more reliable for a certain case study. The procedure was implemented in package of models for landslide susceptibility analysis and integrated in the NewAge-JGrass hydrological model. The package includes three simplified physically based models for landslides susceptibility analysis (M1, M2, and M3 and a component for models verifications. It computes eight goodness of fit indices by comparing pixel-by-pixel model results and measurements data. Moreover, the package integration in NewAge-JGrass allows the use of other components such as geographic information system tools to manage inputs-output processes, and automatic calibration algorithms to estimate model parameters. The system was applied for a case study in Calabria (Italy along the Salerno-Reggio Calabria highway, between Cosenza and Altilia municipality. The analysis provided that among all the optimized indices and all the three models, the optimization of the index distance to perfect classification in the receiver operating characteristic plane (D2PC coupled with model M3 is the best modeling solution for our test case.

  11. Evaluating performances of simplified physically based models for landslide susceptibility

    Science.gov (United States)

    Formetta, G.; Capparelli, G.; Versace, P.

    2015-12-01

    Rainfall induced shallow landslides cause loss of life and significant damages involving private and public properties, transportation system, etc. Prediction of shallow landslides susceptible locations is a complex task that involves many disciplines: hydrology, geotechnical science, geomorphology, and statistics. Usually to accomplish this task two main approaches are used: statistical or physically based model. Reliable models' applications involve: automatic parameters calibration, objective quantification of the quality of susceptibility maps, model sensitivity analysis. This paper presents a methodology to systemically and objectively calibrate, verify and compare different models and different models performances indicators in order to individuate and eventually select the models whose behaviors are more reliable for a certain case study. The procedure was implemented in package of models for landslide susceptibility analysis and integrated in the NewAge-JGrass hydrological model. The package includes three simplified physically based models for landslides susceptibility analysis (M1, M2, and M3) and a component for models verifications. It computes eight goodness of fit indices by comparing pixel-by-pixel model results and measurements data. Moreover, the package integration in NewAge-JGrass allows the use of other components such as geographic information system tools to manage inputs-output processes, and automatic calibration algorithms to estimate model parameters. The system was applied for a case study in Calabria (Italy) along the Salerno-Reggio Calabria highway, between Cosenza and Altilia municipality. The analysis provided that among all the optimized indices and all the three models, the optimization of the index distance to perfect classification in the receiver operating characteristic plane (D2PC) coupled with model M3 is the best modeling solution for our test case.

  12. Evaluation of Liquefaction Return Period for Bangalore Based on Standard Penetration Test Data: Performance Based Approach

    Directory of Open Access Journals (Sweden)

    K. S. Vipin

    2009-01-01

    Full Text Available Problem statement: The conventional liquefaction evaluation is based on a deterministic approach. However in this method the uncertainty in the earthquake loading is not properly taken into account. However recent research in this field indicates that this uncertainty in the earthquake loading has to be considered in the liquefaction potential evaluation. Moreover the evaluation of liquefaction return period is not possible in the conventional deterministic methods. This study explained the methods for evaluating the probability of liquefaction and the return period of liquefaction based on probabilistic approach. Approach: In this study the geotechnical data was collected from 450 bore holes in Bangalore, India, covering an area of 220 km2. The seismic hazard analysis for the study area is carried out using Probabilistic Seismic Hazard Analysis (PSHA and the peak acceleration at ground surface was evaluated for site class-D after considering local site effects. For assessment of site class, shear wave velocity profiles in the city had been obtained using Multichannel Analysis of Surface Waves (MASW survey. Based on this data the probabilistic liquefaction analysis was done to evaluate the probability of liquefaction in the study area. Based on the performance based approach the liquefaction return period for the study area was also evaluated. Results: The results showed the variation of liquefaction susceptibility for the study area. The corrected standard penetration values required to prevent the liquefaction for return periods of 475 and 2500 years were also presented here. Conclusion/Recommendations: The spatial variation of probability of liquefaction and the factor of safety against liquefaction evaluated using the two methods match well for the study area.

  13. Prognostics Performance Evaluation

    Data.gov (United States)

    National Aeronautics and Space Administration — This is the first version of the performance evaluation tool. Evaluation is based on point estimates of the RUL predictions. a more detailed documentation will be...

  14. Performance Evaluation of MANET Routing Protocols Based on Internet Protocols

    Directory of Open Access Journals (Sweden)

    Hilal Bello Said,

    2015-11-01

    Full Text Available The topology of mobile ad hoc network (MANET changes rapidly and unpredictably due to nodes mobility. This makes routing protocols very important to analyze so as to communicate efficiently between the wireless nodes. Another important issue in the MANET is the internet protocols IPv4 and IPV6. The former which have been conventionally in use for long and the latter which is seen as the future standard for network architecture is studied due to its improved protection and huge address space support. In this paper, performance of AODV, DYMO, OLSRv2 and OLSR are analyzed under the IPv4 and IPv6 standards using the Qualnet simulator. Distinct performance metrics viz. Packet delivery ratio, Throughput, Average End-to-End Delay, and Average jitter are selected for the experiment. The results are then analyzed and scrutinized to provide qualitative assessment of their performances.

  15. Satellite communication performance evaluation: Computational techniques based on moments

    Science.gov (United States)

    Omura, J. K.; Simon, M. K.

    1980-01-01

    Computational techniques that efficiently compute bit error probabilities when only moments of the various interference random variables are available are presented. The approach taken is a generalization of the well known Gauss-Quadrature rules used for numerically evaluating single or multiple integrals. In what follows, basic algorithms are developed. Some of its properties and generalizations are shown and its many potential applications are described. Some typical interference scenarios for which the results are particularly applicable include: intentional jamming, adjacent and cochannel interferences; radar pulses (RFI); multipath; and intersymbol interference. While the examples presented stress evaluation of bit error probilities in uncoded digital communication systems, the moment techniques can also be applied to the evaluation of other parameters, such as computational cutoff rate under both normal and mismatched receiver cases in coded systems. Another important application is the determination of the probability distributions of the output of a discrete time dynamical system. This type of model occurs widely in control systems, queueing systems, and synchronization systems (e.g., discrete phase locked loops).

  16. Research on Performance Evaluation of Integrates with Agriculture Food Base and Supermarket

    Directory of Open Access Journals (Sweden)

    Yongqiang Chen

    2015-02-01

    Full Text Available Performance evaluation of integrate with agriculture food base and supermarket is a research hotspot and difficulty in the theory and practice research of agriculture super-docking mode. The study presents an evaluation indicator system and a fuzzy neural network evaluation algorithm for evaluating performance of integrates with agriculture food base and supermarket. Firstly, a performance evaluation indicator system is designed through analyzing the similarities of general performance evaluation and the specialties of the evaluation of integrates with agriculture food base and supermarket; Secondly, the study integrates the advantages of fuzzy evaluation methods and BP neural network evaluation methods, designs a new algorithm structure, selects different learning methods and analyzes the algorithm performance, then presents a new fuzzy neural network evaluation algorithm; Finally, three integrates are taken for experimental examples and the results illustrate that the improved algorithm can be used for evaluating the performance of integrates with agriculture food base and supermarket feasibly and effectively and can provide reference for evaluating other complex systems.

  17. PERFORMANCE EVALUATION OF CONTENT BASED IMAGE RETRIEVAL FOR MEDICAL IMAGES

    Directory of Open Access Journals (Sweden)

    SASI KUMAR. M

    2013-04-01

    Full Text Available Content-based image retrieval (CBIR technology benefits not only large image collections management, but also helps clinical care, biomedical research, and education. Digital images are found in X-Rays, MRI, CT which are used for diagnosing and planning treatment schedules. Thus, visual information management is challenging as the data quantity available is huge. Currently, available medical databases utilization is limited image retrieval issues. Archived digital medical images retrieval is always challenging and this is being researched more as images are of great importance in patient diagnosis, therapy, medical reference, and medical training. In this paper, an image matching scheme using Discrete Sine Transform for relevant feature extraction is presented. The efficiency of different algorithm for classifying the features to retrieve medical images is investigated.

  18. Performance Evaluation of an Option-Based Learning Algorithm in Multi-Car Elevator Systems

    Science.gov (United States)

    Valdivielso Chian, Alex; Miyamoto, Toshiyuki

    In this letter, we present the evaluation of an option-based learning algorithm, developed to perform a conflict-free allocation of calls among cars in a multi-car elevator system. We evaluate its performance in terms of the service time, its flexibility in the task-allocation, and the load balancing.

  19. Performance Evaluation of DWT based Multicarrier Systems over Frequency Selective Channels

    OpenAIRE

    Suganya.M; Ramanathan R

    2015-01-01

    In this work, the performance of DWT based OFDM is studied and compared it with conventional FFT based OFDM over frequency selective channels in different test environments. The Bit Error Rate (BER) estimation is done to evaluate the performance of both the systems. In DWT based OFDM, different wavelet families such as haar, daubechies, coiflet and biorthogonal were used with different levels of decomposition. The simulation results show that in all channels, DWT based OFDM requires less SNR ...

  20. Scheduling Performance Evaluation of Logistics Service Supply Chain Based on the Dynamic Index Weight

    Directory of Open Access Journals (Sweden)

    Weihua Liu

    2014-01-01

    Full Text Available Scheduling is crucial to the operation of logistics service supply chain (LSSC, so scientific performance evaluation method is required to evaluate the scheduling performance. Different from general project performance evaluation, scheduling activities are usually continuous and multiperiod. Therefore, the weight of scheduling performance evaluation index is not unchanged, but dynamically varied. In this paper, the factors that influence the scheduling performance are analyzed in three levels which are strategic environment, operating process, and scheduling results. Based on these three levels, the scheduling performance evaluation index system of LSSC is established. In all, a new performance evaluation method proposed based on dynamic index weight will have three innovation points. Firstly, a multiphase dynamic interaction method is introduced to improve the quality of quantification. Secondly, due to the large quantity of second-level indexes and the requirements of dynamic weight adjustment, the maximum attribute deviation method is introduced to determine weight of second-level indexes, which can remove the uncertainty of subjective factors. Thirdly, an adjustment coefficient method based on set-valued statistics is introduced to determine the first-level indexes weight. In the end, an application example from a logistics company in China is given to illustrate the effectiveness of the proposed method.

  1. Reliability and performance evaluation of systems containing embedded rule-based expert systems

    Science.gov (United States)

    Beaton, Robert M.; Adams, Milton B.; Harrison, James V. A.

    1989-01-01

    A method for evaluating the reliability of real-time systems containing embedded rule-based expert systems is proposed and investigated. It is a three stage technique that addresses the impact of knowledge-base uncertainties on the performance of expert systems. In the first stage, a Markov reliability model of the system is developed which identifies the key performance parameters of the expert system. In the second stage, the evaluation method is used to determine the values of the expert system's key performance parameters. The performance parameters can be evaluated directly by using a probabilistic model of uncertainties in the knowledge-base or by using sensitivity analyses. In the third and final state, the performance parameters of the expert system are combined with performance parameters for other system components and subsystems to evaluate the reliability and performance of the complete system. The evaluation method is demonstrated in the context of a simple expert system used to supervise the performances of an FDI algorithm associated with an aircraft longitudinal flight-control system.

  2. Performance Evaluation of Enterprise Knowledge Management based on Multiple Attribute Group Decision Making

    Institute of Scientific and Technical Information of China (English)

    LIU Yan-chi; GUO Hong-wei

    2009-01-01

    Given that the classical performance evaluation models can not deal with the group decision making problems since they simply average the index, we propose an enterprise knowledge management evaluation model based on multiple attribute group decision making (MAGDM). Find the differences between Ordered Weighted Averaging (OWA) and meth- ods for uncertain decision making. Also, analyze the multiple attribute group decision making process and implement the al. gorithm. Finally, apply the method on performance evaluation of four enterprises and make sensitivity analysis towards the evaluation results.

  3. Performance Evaluation of Received Signal Strength Based Hard Handover for UTRAN LTE

    DEFF Research Database (Denmark)

    Anas, Mohmmad; Calabrese, Francesco Davide; Mogensen, Preben;

    2007-01-01

    This paper evaluates the hard handover performance for UTRAN LTE system. The focus is on the impact that received signal strength based hard handover algorithm have on the system performance measured in terms of number of handovers, time between two consecutive handovers and uplink SINR for a user...

  4. Fuzzy logic based sensor performance evaluation of vehicle mounted metal detector systems

    Science.gov (United States)

    Abeynayake, Canicious; Tran, Minh D.

    2015-05-01

    Vehicle Mounted Metal Detector (VMMD) systems are widely used for detection of threat objects in humanitarian demining and military route clearance scenarios. Due to the diverse nature of such operational conditions, operational use of VMMD without a proper understanding of its capability boundaries may lead to heavy causalities. Multi-criteria fitness evaluations are crucial for determining capability boundaries of any sensor-based demining equipment. Evaluation of sensor based military equipment is a multi-disciplinary topic combining the efforts of researchers, operators, managers and commanders having different professional backgrounds and knowledge profiles. Information acquired through field tests usually involves uncertainty, vagueness and imprecision due to variations in test and evaluation conditions during a single test or series of tests. This report presents a fuzzy logic based methodology for experimental data analysis and performance evaluation of VMMD. This data evaluation methodology has been developed to evaluate sensor performance by consolidating expert knowledge with experimental data. A case study is presented by implementing the proposed data analysis framework in a VMMD evaluation scenario. The results of this analysis confirm accuracy, practicability and reliability of the fuzzy logic based sensor performance evaluation framework.

  5. Research on Supply Chain Performance Evaluation of Fresh Agriculture Products Based on BP Neural Network

    Directory of Open Access Journals (Sweden)

    Hankun Ye

    2014-05-01

    Full Text Available Evaluating supply chain performance of fresh agricultural products is one of the key techniques and a research hotspot in supply chain management and in fields related. The paper designs a new evaluation indicator system and presents a new model for evaluating supply chain performance of fresh agriculture product companies. First, based on analyzing the specific characteristics of the supply chain performance evaluation of fresh agriculture products, the paper designs a new evaluation indicator system including external and internal performance. Second, some improvements, such as adjusting dynamic strategy and the value of momentum factor, are taken to speed up calculation convergence and simplify the structure and to improve evaluating accuracy of the original BP evaluation model. Finally the model is realized with the data from certain supply chains of three fresh agriculture product companies and the experimental results show that the algorithm can improve calculation efficiency and evaluation accuracy when used for supply chain performance evaluation of fresh agriculture product companies practically.

  6. Web-based evaluation of Parkinson's disease subjects: objective performance capacity measurements and subjective characterization profiles.

    Science.gov (United States)

    Kondraske, George V; Stewart, R Malcolm

    2008-01-01

    Parkinson's Disease (PD) is classified as a progressively degenerative movement disorder, affecting approximately 0.2% of the population and resulting in decreased performance in a wide variety of activities of daily living. Motivated by needs associated with the conduct of multi-center clinical trials, early detection, and the optimization of routine management of individuals with PD, we have developed a three-tiered approach to evaluation of PD and other neurologic diseases/disorders. One tier is characterized as 'web-based evaluation', consisting of objective performance capacity tests and subjective questionnaires that target history and symptom evaluation. Here, we present the initial evaluation of three representative, self-administered, objective, web-based performance capacity tests (simple visual-hand response speed, rapid alternating movement quality, and upper extremity neuromotor channel capacity). Twenty-one subjects (13 with PD, 8 without neurologic disease) were evaluated. Generally good agreement was obtained with lab-based tests executed with an experienced test administrator. We conclude that objective performance capacity testing is a feasible component of a web-based evaluation for PD, providing a sufficient level of fidelity to be useful.

  7. PERFORMANCE EVALUATION METHOD FOR BUSINESS PROCESS OF MACHINERY MANUFACTURER BASED ON DEA/AHP HYBRID MODEL

    Institute of Scientific and Technical Information of China (English)

    WANG Ting; YI Shuping; YANG Yuanzhao

    2007-01-01

    A set of indices for performance evaluation for business processes with multiple inputs and multiple outputs is proposed, which are found in machinery manufacturers. Based on the traditional methods of data envelopment analysis (DEA) and analytical hierarchical process (AHP), a hybrid model called DEA/AHP model is proposed to deal with the evaluation of business process performance. With the proposed method, the DEA is firstly used to develop a pairwise comparison matrix, and then the AHP is applied to evaluate the performance of business process using the pairwise comparison matrix. The significant advantage of this hybrid model is the use of objective data instead of subjective human judgment for performance evaluation. In the case study, a project of business process reengineering (BPR) with a hydraulic machinery manufacturer is used to demonstrate the effectiveness of the DEA/AHP model.

  8. Performance evaluation of fuzzy and BPN based congestion controller in WSN

    Directory of Open Access Journals (Sweden)

    Rekha Chakravarthi

    2015-04-01

    Full Text Available In a Wireless Sensor Network when an event is detected, the network traffic increases. It in turn increases the flow of data packets and congestion. Congestion in Wireless Sensor Network plays a vital role in degrading the performance of the network. Hence it necessitates, developing a novel technique to control congestion. In this paper, soft computing based congestion control technique is proposed. Fuzzy logic and neural network are the soft computing tools used for estimating the packet drop. The performance of the proposed technique is evaluated using Accuracy. From the results, it is proved that neural network based congestion control technique provides better results than fuzzy based congestion control technique.

  9. Performance Evaluation of Extension Education Centers in Universities Based on the Balanced Scorecard

    Science.gov (United States)

    Wu, Hung-Yi; Lin, Yi-Kuei; Chang, Chi-Hsiang

    2011-01-01

    This study aims at developing a set of appropriate performance evaluation indices mainly based on balanced scorecard (BSC) for extension education centers in universities by utilizing multiple criteria decision making (MCDM). Through literature reviews and experts who have real practical experiences in extension education, adequate performance…

  10. Performance Evaluation for DFB and VCSEL-based 60 GHz Radio-over-Fiber System

    DEFF Research Database (Denmark)

    Pang, Xiaodan; Lebedev, Alexander; Vegas Olmos, Juan José;

    2013-01-01

    In this paper, we report on a detailed analysis and performance comparison work between 60 GHz radio-over-fiber systems based on a DFB laser and a C-band VCSEL. Coherent photonic up-conversion method is applied for the 60 GHz millimeter-wave signal generation. The generated signals are evaluated...

  11. Performance Evaluation of Bidding-Based Multi-Agent Scheduling Algorithms for Manufacturing Systems

    Directory of Open Access Journals (Sweden)

    Antonio Gordillo

    2014-10-01

    Full Text Available Artificial Intelligence techniques have being applied to many problems in manufacturing systems in recent years. In the specific field of manufacturing scheduling many studies have been published trying to cope with the complexity of the manufacturing environment. One of the most utilized approaches is (multi agent-based scheduling. Nevertheless, despite the large list of studies reported in this field, there is no resource or scientific study on the performance measure of this type of approach under very common and critical execution situations. This paper focuses on multi-agent systems (MAS based algorithms for task allocation, particularly in manufacturing applications. The goal is to provide a mechanism to measure the performance of agent-based scheduling approaches for manufacturing systems under key critical situations such as: dynamic environment, rescheduling, and priority change. With this mechanism it will be possible to simulate critical situations and to stress the system in order to measure the performance of a given agent-based scheduling method. The proposed mechanism is a pioneering approach for performance evaluation of bidding-based MAS approaches for manufacturing scheduling. The proposed method and evaluation methodology can be used to run tests in different manufacturing floors since it is independent of the workshop configuration. Moreover, the evaluation results presented in this paper show the key factors and scenarios that most affect the market-like MAS approaches for manufacturing scheduling.

  12. Performance Evaluation of Stable Weight-Based on Demand Routing Protocol for Mobile Ad Hoc Network

    Directory of Open Access Journals (Sweden)

    Oon C. Hsi

    2009-01-01

    Full Text Available Problem statement: A MANET is an autonomous collection of mobile users that communicate over relatively bandwidth constrained wireless links. Since the nodes are mobile, the network topology may change rapidly and unpredictably over time. Approach: A Stable Weight-based On demand Routing Protocol (SWORP that uses the weight-based route strategy to select a stable route was created by Wang. But SWORP only evaluated in a limited setting of simulation, more simulation parameter have to test with SWORP to evaluate how far this protocol can go on. In this project, SWORP was implemented in simulation environment with two other routing protocols, AODV and DSR. Results: These three protocols were implemented in Network Simulator 2 (NS2 and the performance was compare with performance metrics, end-to-end delay, number of packet drop and packet delivery ratio. Conclusion: As expected, SWORP had outperformed AODV and DSR in the overall routing performance.

  13. Performance Evaluation of K-Mean and Fuzzy C-Mean Image Segmentation Based Clustering Classifier

    Directory of Open Access Journals (Sweden)

    Hind R.M Shaaban

    2015-12-01

    Full Text Available This paper presents Evaluation K-mean and Fuzzy c-mean image segmentation based Clustering classifier. It was followed by thresholding and level set segmentation stages to provide accurate region segment. The proposed stay can get the benefits of the K-means clustering. The performance and evaluation of the given image segmentation approach were evaluated by comparing K-mean and Fuzzy c-mean algorithms in case of accuracy, processing time, Clustering classifier, and Features and accurate performance results. The database consists of 40 images executed by K-mean and Fuzzy c-mean image segmentation based Clustering classifier. The experimental results confirm the effectiveness of the proposed Fuzzy c-mean image segmentation based Clustering classifier. The statistical significance Measures of mean values of Peak signal-to-noise ratio (PSNR and Mean Square Error (MSE and discrepancy are used for Performance Evaluation of K-mean and Fuzzy c-mean image segmentation. The algorithm’s higher accuracy can be found by the increasing number of classified clusters and with Fuzzy c-mean image segmentation.

  14. Research on Performance Evaluation of Biological Database based on Layered Queuing Network Model under the Cloud Computing Environment

    OpenAIRE

    Zhengbin Luo; Dongmei Sun

    2013-01-01

    To evaluate the performance of biological database based on layered queuing network model and under cloud computing environment is a premise, as well as an important step for biological database optimization. Based on predecessors’ researches concerning computer software and hardware performance evaluation under cloud environment, the study has further constructed a model system to evaluate the performance of biological database based on layered queuing network model and under cloud environme...

  15. Evaluation about the performance of E-government based on interval-valued intuitionistic fuzzy set.

    Science.gov (United States)

    Zhang, Shuai; Yu, Dejian; Wang, Yan; Zhang, Wenyu

    2014-01-01

    The evaluation is an important approach to promote the development of the E-Government. Since the rapid development of E-Government in the world, the E-Government performance evaluation has become a hot issue in the academia. In this paper, we develop a new evaluation method for the development of the E-Government based on the interval-valued intuitionistic fuzzy set which is a powerful technique in expressing the uncertainty of the real situation. First, we extend the geometric Heronian mean (GHM) operator to interval-valued intuitionistic fuzzy environment and proposed the interval-valued intuitionistic fuzzy GHM (IIFGHM) operator. Then, we investigate the relationships between the IIFGHM operator and some existing ones, such as generalized interval-valued intuitionistic fuzzy HM (GIIFHM) and interval-valued intuitionistic fuzzy weighted Bonferoni mean operator. Furthermore, we validate the effectiveness of the proposed method using a real case about the E-Government evaluation in Hangzhou City, China.

  16. Evaluation of Performance of Investment Funds Based on Decision Models (DEA

    Directory of Open Access Journals (Sweden)

    Alireza Samet

    2016-12-01

    Full Text Available Selection of a suitable investment funds is very important from investors' point of view and may have a significant impact on the profit or loss of the funds. Therefore, evaluation of performance of investment funds to choose the most suitable fund will be given special emphasis. One of the new techniques for evaluating the performance of the Funds based on efficiency is the Data Envelopment Analysis technique. Accordingly, the present study is aimed to analyze and evaluate the performance of investment Funds in capital market of Iran, using the technique of efficiency evaluation through data envelopment analysis technique (DEA. This research is a descriptive - applicable study and to analyze the efficiency and effectiveness, 53 investment funds in the capital market of Iran in 2013 were considered as the sample. To analyze the efficiency of these funds, data envelopment analysis (DEA is used. Research findings showed that in 2013, of a total of 53 examined funds, 11 funds were in the efficiency situation and the other 42 funds were in a state of inefficiency. Also the reference funds and virtual composited funds of all inefficient funds were evaluated.

  17. Smooth pursuit detection in binocular eye-tracking data with automatic video-based performance evaluation.

    Science.gov (United States)

    Larsson, Linnéa; Nyström, Marcus; Ardö, Håkan; Åström, Kalle; Stridh, Martin

    2016-12-01

    An increasing number of researchers record binocular eye-tracking signals from participants viewing moving stimuli, but the majority of event-detection algorithms are monocular and do not consider smooth pursuit movements. The purposes of the present study are to develop an algorithm that discriminates between fixations and smooth pursuit movements in binocular eye-tracking signals and to evaluate its performance using an automated video-based strategy. The proposed algorithm uses a clustering approach that takes both spatial and temporal aspects of the binocular eye-tracking signal into account, and is evaluated using a novel video-based evaluation strategy based on automatically detected moving objects in the video stimuli. The binocular algorithm detects 98% of fixations in image stimuli compared to 95% when only one eye is used, while for video stimuli, both the binocular and monocular algorithms detect around 40% of smooth pursuit movements. The present article shows that using binocular information for discrimination of fixations and smooth pursuit movements is advantageous in static stimuli, without impairing the algorithm's ability to detect smooth pursuit movements in video and moving-dot stimuli. With an automated evaluation strategy, time-consuming manual annotations are avoided and a larger amount of data can be used in the evaluation process.

  18. Performance Evaluation of Content Based Image Retrieval on Feature Optimization and Selection Using Swarm Intelligence

    Directory of Open Access Journals (Sweden)

    Kirti Jain

    2016-03-01

    Full Text Available The diversity and applicability of swarm intelligence is increasing everyday in the fields of science and engineering. Swarm intelligence gives the features of the dynamic features optimization concept. We have used swarm intelligence for the process of feature optimization and feature selection for content-based image retrieval. The performance of content-based image retrieval faced the problem of precision and recall. The value of precision and recall depends on the retrieval capacity of the image. The basic raw image content has visual features such as color, texture, shape and size. The partial feature extraction technique is based on geometric invariant function. Three swarm intelligence algorithms were used for the optimization of features: ant colony optimization, particle swarm optimization (PSO, and glowworm optimization algorithm. Coral image dataset and MatLab software were used for evaluating performance.

  19. Research on Performance Evaluation of Biological Database based on Layered Queuing Network Model under the Cloud Computing Environment

    Directory of Open Access Journals (Sweden)

    Zhengbin Luo

    2013-06-01

    Full Text Available To evaluate the performance of biological database based on layered queuing network model and under cloud computing environment is a premise, as well as an important step for biological database optimization. Based on predecessors’ researches concerning computer software and hardware performance evaluation under cloud environment, the study has further constructed a model system to evaluate the performance of biological database based on layered queuing network model and under cloud environment. Moreover, traditional layered queuing network model is also optimized and upgraded in this process. After having constructed the performance evaluation system, the study applies laboratory experiment method to test the validity of the constructed performance model. Shown by the test result, this model is effective in evaluating the performance of biological system under cloud environment and the predicted result is quite close to the tested result. This has demonstrated the validity of the model in evaluating the performance of biological database.

  20. A Framework For Performance Evaluation Of ASIPs in Network-Based IDS

    Directory of Open Access Journals (Sweden)

    Majid Nezakatolhoseini

    2012-10-01

    Full Text Available Nowadays efficient usage of high-tech security tools and appliances is considered as an importantcriterion for security improvement of computer networks. Based on this assumption, Intrusion Detectionand Prevention Systems (IDPS have key role for applying the defense in depth strategy. In this situation,by increasing network bandwidth in addition to increasing number of threats, Network-based IDPSeshave been faced with performance challenge for processing of huge traffic in the networks. A generalsolution for this bottleneck is exploitation of efficient hardware architectures for performanceimprovement of IDPS. In this paper a framework for analysis and performance evaluation of applicationspecific instruction set processors is presented for usage in application of attack detection in NetworkbasedIntrusion Detection Systems(NIDS. By running this framework as a security application on V850,OR1K, MIPS32, ARM7TDMI and PowerPC32 microprocessors, their performance has been evaluatedand analyzed. For performance improvement, the compiler optimization levels are employed and at theend; base on O2 optimization level a new combination of optimization flags is presented. The experimentsshow that the framework results 18.10% performance improvements for pattern matching on ARM7TDMImicroprocessors.

  1. Content-based image retrieval system for solid waste bin level detection and performance evaluation.

    Science.gov (United States)

    Hannan, M A; Arebey, M; Begum, R A; Basri, Hassan; Al Mamun, Md Abdulla

    2016-04-01

    This paper presents a CBIR system to investigate the use of image retrieval with an extracted texture from the image of a bin to detect the bin level. Various similarity distances like Euclidean, Bhattacharyya, Chi-squared, Cosine, and EMD are used with the CBIR system for calculating and comparing the distance between a query image and the images in a database to obtain the highest performance. In this study, the performance metrics is based on two quantitative evaluation criteria. The first one is the average retrieval rate based on the precision-recall graph and the second is the use of F1 measure which is the weighted harmonic mean of precision and recall. In case of feature extraction, texture is used as an image feature for bin level detection system. Various experiments are conducted with different features extraction techniques like Gabor wavelet filter, gray level co-occurrence matrix (GLCM), and gray level aura matrix (GLAM) to identify the level of the bin and its surrounding area. Intensive tests are conducted among 250 bin images to assess the accuracy of the proposed feature extraction techniques. The average retrieval rate is used to evaluate the performance of the retrieval system. The result shows that, the EMD distance achieved high accuracy and provides better performance than the other distances.

  2. An evaluation method based on absolute difference to validate the performance of SBNUC algorithms

    Science.gov (United States)

    Jin, Minglei; Jin, Weiqi; Li, Yiyang; Li, Shuo

    2016-09-01

    Scene-based non-uniformity correction (SBNUC) algorithms are an important part of infrared image processing; however, SBNUC algorithms usually cause two defects: (1) ghosting artifacts and (2) over-correction. In this paper, we use the absolute difference based on guided image filter (AD-GF) method to validate the performance of SBNUC algorithms. We obtain a self-separation source using the improved guided image filter to process the input image, and use the self-separation source to obtain the space-high-frequency parts of the input image and the corrected image. Finally, we use the absolute difference between the two space-high-frequency parts as the evaluation result. Based on experimental results, the AD-GF method has better robustness and can validate the performance of SBNUC algorithms even if ghosting artifacts or over-correction occur. Also the AD-GF method can measure how SBNUC algorithms perform in the time domain, it's an effective evaluation method for SBNUC algorithm.

  3. ANN based Performance Evaluation of BDI for Condition Monitoring of Induction Motor Bearings

    Science.gov (United States)

    Patel, Raj Kumar; Giri, V. K.

    2016-07-01

    One of the critical parts in rotating machines is bearings and most of the failure arises from the defective bearings. Bearing failure leads to failure of a machine and the unpredicted productivity loss in the performance. Therefore, bearing fault detection and prognosis is an integral part of the preventive maintenance procedures. In this paper vibration signal for four conditions of a deep groove ball bearing; normal (N), inner race defect (IRD), ball defect (BD) and outer race defect (ORD) were acquired from a customized bearing test rig, under four different conditions and three different fault sizes. Two approaches have been opted for statistical feature extraction from the vibration signal. In the first approach, raw signal is used for statistical feature extraction and in the second approach statistical features extracted are based on bearing damage index (BDI). The proposed BDI technique uses wavelet packet node energy coefficients analysis method. Both the features are used as inputs to an ANN classifier to evaluate its performance. A comparison of ANN performance is made based on raw vibration data and data chosen by using BDI. The ANN performance has been found to be fairly higher when BDI based signals were used as inputs to the classifier.

  4. Wind farms providing secondary frequency regulation: Evaluating the performance of model-based receding horizon control

    Science.gov (United States)

    Shapiro, Carl R.; Meyers, Johan; Meneveau, Charles; Gayme, Dennice F.

    2016-09-01

    We investigate the use of wind farms to provide secondary frequency regulation for a power grid. Our approach uses model-based receding horizon control of a wind farm that is tested using a large eddy simulation (LES) framework. In order to enable real-time implementation, the control actions are computed based on a time-varying one-dimensional wake model. This model describes wake advection and interactions, both of which play an important role in wind farm power production. This controller is implemented in an LES model of an 84-turbine wind farm represented by actuator disk turbine models. Differences between the velocities at each turbine predicted by the wake model and measured in LES are used for closed-loop feedback. The controller is tested on two types of regulation signals, “RegA” and “RegD”, obtained from PJM, an independent system operator in the eastern United States. Composite performance scores, which are used by PJM to qualify plants for regulation, are used to evaluate the performance of the controlled wind farm. Our results demonstrate that the controlled wind farm consistently performs well, passing the qualification threshold for all fastacting RegD signals. For the RegA signal, which changes over slower time scales, the controlled wind farm's average performance surpasses the threshold, but further work is needed to enable the controlled system to achieve qualifying performance all of the time.

  5. Performance Based Evaluation of Concrete Strength under Various Curing Conditions to Investigate Climate Change Effects

    Directory of Open Access Journals (Sweden)

    Tae-Kyun Kim

    2015-07-01

    Full Text Available Recently, the manifestation of global warming-induced climate change has been observed through super typhoons, heavy snowfalls, torrential rains, and extended heat waves. These climate changes have been occurring all over the world and natural disasters have caused severe damage and deterioration of concrete structures and infrastructure. In an effort to deal with these problems due to extreme and abnormal climate changes, studies have been conducted to develop construction technologies and design guidelines. Nevertheless, study results applicable to construction sites continue to be ineffective and insufficient. Therefore, this study proposes ways to cope with climate change by considering the effect of concrete curing condition variations on concrete material performance. More specifically, the 3-, 7- and 28-day compressive and split tensile strength properties of concrete mix cured under various climatic factors including temperature, relative humidity, wind speed, and sunlight exposure time were evaluated to determine whether the concrete meets the current design requirements. Thereafter, a performance based evaluation (PBE was performed using satisfaction probabilities based on the test values to understand the problems associated with the current mix proportion design practice and to identify countermeasures to deal with climate change-induced curing conditions.

  6. A Measure Based on Beamforming Power for Evaluation of Sound Field Reproduction Performance

    DEFF Research Database (Denmark)

    Chang, Ji-ho; Jeong, Cheol-Ho

    2017-01-01

    to the difference in the amplitude decay rate, whereas the degradation of human localization performance is limited. The measure proposed in this study is based on the beamforming powers of the desired and the reproduced fields. Simulation and experimental results show that the proposed measure is less sensitive......This paper proposes a measure to evaluate sound field reproduction systems with an array of loudspeakers. The spatially-averaged squared error of the sound pressure between the desired and the reproduced field, namely the spatial error, has been widely used, which has considerable problems in two...

  7. A QUESTIONNAIRE BASED STUDY TO EVALUATE PERFORMANCE OF A CME PROGRAMME BY THE PARTICIPANTS

    Directory of Open Access Journals (Sweden)

    Jain

    2013-02-01

    Full Text Available ABSTRACT: INTRODUCTION: Performance evaluation of any learning – teaching a ctivity by the students is routine exercise at most of the interna tional institutions for higher education. Some speakers prefer to evaluate their own skills by givin g pre-designed set of questions to the prospective participants for their own record and furth er improvement. Here, we have tried to evaluate overall performance of a CME programme as co nceived by the participants. The reasons for doing so were many folds. Firstly, the topic of CME was out of context to medical curriculum and it was sensitive too. Secondly, ther e were no incentives for the participants to attend the programme other than CME theme i.e. no MM C credit hours, no gifts, no food but only a certificate of participation. Lastly, during the planning of CME programme, doubts were expressed by some of the college authorities as rega rd to success of CME. All these prompted us to seek first hand information from the participants regarding their views on CME topic, speakers and academic content. MATERIAL & METHODS: This was a questionnaire based evaluation. All three resident doctors under the gu idance of CME faculty prepared a set of questions to evaluate CME performance in respect of the topic, the speakers and overall assessment of entire activity. The questions were pr epared accordingly and pilot tested in some volunteers. Each question had five options ranging f rom strongly agreed to strongly disagree. Result was expressed in term of percentage response in either ‘agree’ or ‘disagree category’. RESULTS: The response of participants to CME activity was une xpectedly overwhelming. Almost, 85 to 95% of participants liked the topic. All the speakers were highly appreciated for their presentation and knowledge. Nearly 95% of the participants opined favourably to overall success of CME. CONCLUSIONS: From the results, it can be concluded that there wa s overwhelming response from the

  8. Design-based metrology: beyond CD/EPE metrics to evaluate printability performance

    Science.gov (United States)

    Halder, Sandip; Mailfert, Julien; Leray, Philippe; Rio, David; Peng, Yi-Hsing; Laenens, Bart

    2016-03-01

    Process-window (PW) evaluation is critical to assess the lithography process quality and limitations. Usual CD-based PW gives only a partial answer. Simulations such as Tachyon LMC (Lithography Manufacturability Check) can efficiently overcome this limitation by analyzing the entire predicted resist contours. But so far experimental measurements did not allow such flexibility. This paper shows an innovative experimental flow, which allows the user to directly validate LMC results across PW for a select group of reference patterns, thereby overcoming the limitations found in the traditional CD-based PW analysis. To evaluate the process window on wafer more accurately, we take advantage of design based metrology and extract experimental contours from the CD-SEM measurements. Then we implement an area metric to quantify the area coverage of the experimental contours with respect to the intended ones, using a defined "sectorization" for the logic structures. This `sectorization' aims to differentiate specific areas on the logic structures being analyzed, such as corners, line-ends, short and long lines. This way, a complete evaluation of the information contained in each CD-SEM picture is performed, without having to discard any information. This solution doesn't look at the area coverage of an entire feature, but uses a `sectorization' to differentiate specific feature areas such as corners, line-ends, short and long lines, and thus look at those area coverages. An assessment of resist model/OPC quality/process quality at sub nm-level accuracy is rendered possible.

  9. Low Carbon Supply Chain’s Performance Evaluation Based on Entropy Method and Fuzzy Comprehensive Evaluation Method

    Directory of Open Access Journals (Sweden)

    Xu Xu

    2013-06-01

    Full Text Available This study constructed a performance evaluation index system of low carbon supply chain from the economic, resources and environment. This index system highlights the environmental value orientation and green culture technology evaluation. On this basis, uses entropy value method to definite the index system of index weigh and uses the fuzzy comprehensive evaluation method to establish the evaluation model. It overcomes the respective faults of the entropy value method and fuzzy comprehensive evaluation method and makes low carbon supply chain performance evaluation more scientific and accurate. Finally, the model was verified analysis.

  10. Preliminary Performance Evaluation of MEMS-based Piezoelectric Energy Harvesters in Extended Temperature Range

    DEFF Research Database (Denmark)

    Xu, R.; Borregaard, L.M.; Lei, A.

    2012-01-01

    In this work a batch of MEMS-based vibration energy harvesters consisting of a silicon/PZT thick film ntilever with integrated proof mass is characterized. The purpose of a vibration energy harvester is to convert low grade vibrations to useful electrical power. Optimally, the natural frequency...... of the harvester should match the frequency of he ambient vibration. The first step to achieve this is to evaluate the uniformity of the fabricated harvesters and nderstand the effects of temperature on the harvesters during operation. Therefore, the uniformity of 40 energy harvesters from one wafer has been...... evaluated. Thereafter the performance of the energy harvesters operating at emperatures between -30°C to 100°C was measured....

  11. A Process for Curricular Improvement Based on Evaluation of Student Performance on Milestone Examinations

    Science.gov (United States)

    Hylton, Ann C.; Justice, Michael

    2016-01-01

    Objective. To identify and address areas for curricular improvement by evaluating student achievement of expected learning outcomes and competencies on annual milestone examinations. Design. Students were tested each professional year with a comprehensive milestone examination designed to evaluate student achievement of learning outcomes and professional competencies using a combination of multiple-choice questions, standardized patient assessments (SPAs), and objective structured clinical examination (OSCE) questions. Assessment. Based on student performance on milestone examinations, curricular changes were instituted, including an increased emphasis on graded comprehensive cases, OSCE skills days, and use of patient simulation in lecture and laboratory courses. After making these changes, significant improvements were observed in second and third-year pharmacy students’ grades for the therapeutic case and physician interaction/errors and omissions components of the milestone examinations. Conclusion. Results from milestone examinations can be used to identify specific areas in which curricular improvements are needed to foster student achievement of learning outcomes and professional competencies. PMID:28090108

  12. Comparative Performance Evaluation of Large FPGAs with CNFET-and CMOS-based Switches in Nanoscale

    Institute of Scientific and Technical Information of China (English)

    Mohammad Hossein Moaiyeri; Ali Jahaniana; Keivan Navi

    2011-01-01

    Routing resources are the major bottlenecks in improving the performance and power consumption of the current FPGAs. Recently reported researches have shown that carbon nanotube field effect transistors (CNFETs) have considerable potentials for improving the delay and power consumption of the modern FP-GAs. In this paper, hybrid CNFET-CMOS architecture is presented for FPGAs and then this architecture is evaluated to be used in modern FPGAs. In addition, we have designed and parameterized the CNFET-based FPGA switches and calibrated them for being utilized in FPGAs at 45 nm, 22 nm and 16 nm technology nodes. Simulation results show that the CNFET-based FPGA switches improve the current FPGAs in terms of per-formance, power consumption and immunity to process and temperature variations. Simulation results and analyses also demonstrate that the performance of the FPGAs is improved about 30%, on average and the average and leakage power consumptions are reduced more than 6% and 98% respectively when the CNFET switches are used instead of MOSFET FPGA switches. Moreover, this technique leads to more than 20.31%smaller area. It is worth mentioning that the advantages of CNFET-based FPGAs are more considerable when the size of FPGAs grows and also when the technology node becomes smaller.

  13. Applied Research Based on the Fibonacci Sequence NBA Center Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Mingyou Gao

    2013-04-01

    Full Text Available The purpose of this paper study is the application of the “Fibonacci sequence” a new perspective and dimension, select five NBA excellent center players performance evaluation, and thus the size and ranking of the performance of the five players. Five players the pros and cons of the career data with the size of the Fibonacci sequence study the performance of players and then compare to see if consistent harmonious Fibonacci sequence of the universe, thus can be extended to other good players in the league performance evaluation, which provide a way for the players performance evaluation.

  14. Experimental performance evaluation of heat pump-based steam supply system

    Science.gov (United States)

    Kaida, T.; Sakuraba, I.; Hashimoto, K.; Hasegawa, H.

    2015-08-01

    Heat pumps have become increasingly important as a technology to reduce primary energy consumption and greenhouse effect gas emission. They are presently used mainly on residential air-conditioning and domestic hot water and are expected to spread to industrial heating processes. In 2011, Kobe Steel, Ltd. developed and commercialized two heat pump- based steam supply systems; the high efficiency steam supply system with a steam temperature of 120°C (SGH120) and the system which enables a steam temperature of 165°C (sGh165). For promoting the spread of these industrial heat pumps and enhancing the reliability of them, we investigate experimentally steam generation rate, energy efficiency and controlled performance of the SGH165 under various operating conditions on the assumption of actual different industrial processes, and evaluate technical possibilities for better performance.

  15. PERFORMANCE EVALUATION FOR DAMPING CONTROLLERS OF POWER SYSTEMS BASED ON MULTI-AGENT MODELS

    Institute of Scientific and Technical Information of China (English)

    Ancheng XUE; Yiguang HONG

    2009-01-01

    This paper proposes a multi-layer multi-agent model for the performance evaluation of power systems, which is different from the existing multi-agent ones. To describe the impact of the structure of the networked power system, .the proposed model consists of three kinds of agents that form three layers: control agents such as the generators and associated controllers, information agents to exchange the information based on the wide area measurement system (WAMS) or transmit control signals to the power system stabilizers (PSSs), and network-node agents such as the generation nodes and load nodes connected with transmission lines. An optimal index is presented to evaluate the performance of damping controllers to the system's inter-area oscillation with respect to the information-layer topology.Then, the authors show that the inter-area information exchange is more powerful than the exchange within a given area to control the inter-area low frequency oscillation based on simulation analysis.

  16. Performance Evaluation of Density-Based Outlier Detection on High Dimensional Data

    Directory of Open Access Journals (Sweden)

    P. Murugavel

    2013-02-01

    Full Text Available Outlier detection is a task that finds objects that are considerably dissimilar, exceptional or inconsistent with respect to the remaining data. Outlier detection has wide applications which include data analysis, financial fraud detection, network intrusion detection and clinical diagnosis of diseases. In data analysis applications, outliers are often considered as error or noise and are removed once detected. Approaches to detect and remove outliers have been studied by several researchers. Density based approaches have been proved to be effective in detecting outliers successfully, but usually requires huge amount of computations. In this paper, two approaches that enhance the traditional density based method for removing outliers are analyzed. The first method uses data partitioning method and usespeed up strategies to avoid large computations. The second method presents a unified clustering and outlier detection using Neighbourhood based Local Density Factor (NLDF. The aim of both the models is to improve the performance of outlier detection, clustering and to speed up the whole process. In this paper, the working of these two papers is studied and a performance evaluation based on clustering efficiency and outlier detection efficiency is presented.

  17. A high-performance spatial database based approach for pathology imaging algorithm evaluation

    Directory of Open Access Journals (Sweden)

    Fusheng Wang

    2013-01-01

    validated data were formatted based on the PAIS data model and loaded into a spatial database. To support efficient data loading, we have implemented a parallel data loading tool that takes advantage of multi-core CPUs to accelerate data injection. The spatial database manages both geometric shapes and image features or classifications, and enables spatial sampling, result comparison, and result aggregation through expressive structured query language (SQL queries with spatial extensions. To provide scalable and efficient query support, we have employed a shared nothing parallel database architecture, which distributes data homogenously across multiple database partitions to take advantage of parallel computation power and implements spatial indexing to achieve high I/O throughput. Results: Our work proposes a high performance, parallel spatial database platform for algorithm validation and comparison. This platform was evaluated by storing, managing, and comparing analysis results from a set of brain tumor whole slide images. The tools we develop are open source and available to download. Conclusions: Pathology image algorithm validation and comparison are essential to iterative algorithm development and refinement. One critical component is the support for queries involving spatial predicates and comparisons. In our work, we develop an efficient data model and parallel database approach to model, normalize, manage and query large volumes of analytical image result data. Our experiments demonstrate that the data partitioning strategy and the grid-based indexing result in good data distribution across database nodes and reduce I/O overhead in spatial join queries through parallel retrieval of relevant data and quick subsetting of datasets. The set of tools in the framework provide a full pipeline to normalize, load, manage and query analytical results for algorithm evaluation.

  18. Performance evaluation of self-breakdown-based single-gap plasma cathode electron gun

    Indian Academy of Sciences (India)

    Niraj Kumar; Nalini Pareek; Udit Narayan Pal; Deepak Kumar Verma; Jitendra Prajapati; Mahesh Kumar; Bharat Lal Meena; Ram Prakash

    2014-06-01

    This paper presents the experimental studies on self-breakdown-based single-gap plasma cathode electron (PCE) gun (5–20 kV/50–160 A) in argon, gas atmosphere and its performance evaluation based on particle-in-cell (PIC) simulation code `OOPIC-Pro’.The PCE-Gun works in conducting phase (low energy, high current) of pseudospark discharge. It produces an intense electron beam, which can propagate more than 200 mm in the drift space region without external magnetic field. The profile of this beam in the drift space region at different breakdown conditions (i.e., gas pressures and applied voltages) has been studied and the experimental results are compared with simulated values. It is demonstrated that ∼30% beam current is lost during the propagation possibly due to space charge neutralization and collisions with neutral particles and walls.

  19. Malawi - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium Challenge Corporation — This ex post performance evaluation was carried out to provide an independent, objective investigation into the effectiveness and efficacy of MTP activities, using...

  20. Computer Architecture Performance Evaluation Methods

    CERN Document Server

    Eeckhout, Lieven

    2010-01-01

    Performance evaluation is at the foundation of computer architecture research and development. Contemporary microprocessors are so complex that architects cannot design systems based on intuition and simple models only. Adequate performance evaluation methods are absolutely crucial to steer the research and development process in the right direction. However, rigorous performance evaluation is non-trivial as there are multiple aspects to performanceevaluation, such as picking workloads, selecting an appropriate modeling or simulation approach, running the model and interpreting the results usi

  1. Performance evaluation of four grid-based dispersion models in complex terrain

    Science.gov (United States)

    Tesche, T. W.; Haney, J. L.; Morris, R. E.

    Four numerical grid-based dispersion models (Mathew/ADPIC, SMOG, Hybrid, and 2DFLOW) were adapted to the Geysers-Calistoga geothermal area in northern California. The models were operated using five intensive meteorological and tracer diffusion data sets collected during the 1981 ASCOT field experiment at the Geysers (three nocturnal drainage and two daytime valley stagnation episodes). The 2DFLOW and Hybrid Models were found to perform best for drainage and limited-mixing conditions, respectively. These two models were subsequently evaluated using data from five 1980 ASCOT drainage experiments. The Hybrid Model was also tested using data from nine limited-mixing and downwash tracer experiments performed at the Geysers prior to the ASCOT program. Overall, the 2DFLOW Model performed best for drainage flow conditions, whereas the Hybrid Model performed best for valley stagnation (limited-mixing) and moderate crossridge wind conditions. To aid new source review studies at the Geysers, a series of source-receptor transfer matrices were generated for several different meteorological regimes under a variety of emission scenarios using the Hybrid Model. These matrices supply ready estimates of cumulative hydrogen sulfide impacts from various geothermal sources in the region.

  2. Evaluation of Performance of Background Traffic-based CMT-SCTP with Active Queue Management Algorithms

    Directory of Open Access Journals (Sweden)

    Meifang Shen

    2012-11-01

    Full Text Available Existing researches on performance analysis of SCTPs Concurrent Multipath Transfer (CMT-SCTP usually use DropTail algorithm as queue management algorithm without considering the impact of the background traffic. However, the background traffic of realistic network environments has an important impact on the QoS of SCTP. Besides, more and more Active Queue Management (AQM algorithms have been proposed as a router-based mechanism for early congestion detection to keep the stability of the whole network. This paper investigates the effect of background traffic on the performance of CMT-SCTP, and evaluates the performance of CMT-SCTP under two realistic simulation topologies with reasonable background traffic and different AQM algorithms in NS-2. The simulation results show that: 1 the performance of CMT-SCTP depends on characteristic of background traffic; and 2 the different AQM algorithms used as queue management algorithm under same background traffic have the different effects. Finally, this paper summarizes the proposals to satisfy the QoS requirements in terms of throughput, end-to-end packet delay and loss rate. Since CMT-PF2 is recommended by RFC4960 but without taking impact of cross traffic into account. In the second part, we use the most promising topology which meets the developing network and base on result of analysis mentioned in the first part to analyze the performance CMT-PF1/2/3/4 played respectively, in this part, the most common scenario, symmetric CMT-SCTP, is adopted and CMT-PF algorithm is turned on. A conclusion had been nailed down that, CMT-PF3 can get more advantage in terms of average throughput than CMT-PF2 which is recommended by RFC4960. Per reasonable analyzing, we lastly recommend a more reasonable resolution for realistic network in order to reaching more satisfied QoS.

  3. Performance Evaluation of Ant-Based Routing Protocols for Wireless Sensor Networks

    Directory of Open Access Journals (Sweden)

    Adamu Murtala Zungeru

    2012-05-01

    Full Text Available High efficient routing is an important issue in the design of limited energy resource Wireless Sensor Networks (WSNs. Due to the characteristic of the environment at which the sensor node is to operate, coupled with severe resources; on-board energy, transmission power, processing capability, and storage limitations, prompt for careful resource management and new routing protocol so as to counteract the differences and challenges. To this end, we present an Improved Energy-Efficient Ant-Based Routing (IEEABR Algorithm in wireless sensor networks. Compared to the state-of-the-art Ant-Based routing protocols; Basic Ant-Based Routing (BABR Algorithm, Sensor-driven and Cost-aware ant routing (SC, Flooded Forward ant routing (FF, Flooded Piggybacked ant routing (FP, and Energy-Efficient Ant-Based Routing (EEABR, the proposed IEEABR approach has advantages in terms of reduced energy usage which can effectively balance the WSN node€™s power consumption, and high energy efficiency. The performance evaluations for the algorithms on a real application are conducted in a well known WSN MATLAB-based simulator (RMASE using both static and dynamic scenario.

  4. Performance evaluation of tile-based Fisher Ratio analysis using a benchmark yeast metabolome dataset.

    Science.gov (United States)

    Watson, Nathanial E; Parsons, Brendon A; Synovec, Robert E

    2016-08-12

    Performance of tile-based Fisher Ratio (F-ratio) data analysis, recently developed for discovery-based studies using comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC×GC-TOFMS), is evaluated with a metabolomics dataset that had been previously analyzed in great detail, but while taking a brute force approach. The previously analyzed data (referred to herein as the benchmark dataset) were intracellular extracts from Saccharomyces cerevisiae (yeast), either metabolizing glucose (repressed) or ethanol (derepressed), which define the two classes in the discovery-based analysis to find metabolites that are statistically different in concentration between the two classes. Beneficially, this previously analyzed dataset provides a concrete means to validate the tile-based F-ratio software. Herein, we demonstrate and validate the significant benefits of applying tile-based F-ratio analysis. The yeast metabolomics data are analyzed more rapidly in about one week versus one year for the prior studies with this dataset. Furthermore, a null distribution analysis is implemented to statistically determine an adequate F-ratio threshold, whereby the variables with F-ratio values below the threshold can be ignored as not class distinguishing, which provides the analyst with confidence when analyzing the hit table. Forty-six of the fifty-four benchmarked changing metabolites were discovered by the new methodology while consistently excluding all but one of the benchmarked nineteen false positive metabolites previously identified.

  5. Laboratory Performance Evaluation of Physical and Mechanical Road Base Construction Properties

    Directory of Open Access Journals (Sweden)

    Mojtaba Shojaei Baghini

    2015-05-01

    Full Text Available Road-bases are quarry materials, which are used in the construction of road pavements. They comprised a combination of coarse and fine crushed materials, which when placed and compacted at the correct moisture, form a stiff layer. For soil aggregates materials to be used correctly in road construction, it is necessary to know their properties. In addition, road-base material characterizations are needed to design an adequate pavement structure for expected traffics load. This study aims to evaluate the effects of the physical, chemical and mechanical behaviors of soil aggregate as granular road base materials in order to provide rudimentary understanding of roads based materials on mechanistic-empirical pavement design and analysis using experimental laboratory tests. These tests were performed in accordance with American Society for Testing and Materials (ASTM and British Standards (BS on fine and coarse soil aggregates along with base aggregate used in pavements. The results show that the optimum moisture content, maximum dry density and plasticity index have significant influence on the behavior of these materials.

  6. Performance evaluation of wavelet-based ECG compression algorithms for telecardiology application over CDMA network.

    Science.gov (United States)

    Kim, Byung S; Yoo, Sun K

    2007-09-01

    The use of wireless networks bears great practical importance in instantaneous transmission of ECG signals during movement. In this paper, three typical wavelet-based ECG compression algorithms, Rajoub (RA), Embedded Zerotree Wavelet (EZ), and Wavelet Transform Higher-Order Statistics Coding (WH), were evaluated to find an appropriate ECG compression algorithm for scalable and reliable wireless tele-cardiology applications, particularly over a CDMA network. The short-term and long-term performance characteristics of the three algorithms were analyzed using normal, abnormal, and measurement noise-contaminated ECG signals from the MIT-BIH database. In addition to the processing delay measurement, compression efficiency and reconstruction sensitivity to error were also evaluated via simulation models including the noise-free channel model, random noise channel model, and CDMA channel model, as well as over an actual CDMA network currently operating in Korea. This study found that the EZ algorithm achieves the best compression efficiency within a low-noise environment, and that the WH algorithm is competitive for use in high-error environments with degraded short-term performance with abnormal or contaminated ECG signals.

  7. Testbed-based Performance Evaluation of Attack Resilient Control for AGC

    Energy Technology Data Exchange (ETDEWEB)

    Ashok, Aditya; Sridhar, Siddharth; McKinnon, Archibald D.; Wang, Pengyuan Wang; Govindarasu, Manimaran

    2016-09-22

    The modern electric power grid is a complex cyber-physical system whose reliable operation is enabled by a wide-area monitoring and control infrastructure. This infrastructure, supported by an extensive communication backbone, enables several control applications functioning at multiple time scales to ensure the grid is maintained within stable operating limits. Recent events have shown that vulnerabilities in this infrastructure may be exploited to manipulate the data being exchanged. Such a scenario could cause the associated control application to mis-operate, potentially causing system-wide instabilities. There is a growing emphasis on looking beyond traditional cybersecurity solutions to mitigate such threats. In this paper we perform a testbed-based validation of one such solution - Attack Resilient Control (ARC) - on Iowa State University's \\textit{PowerCyber} testbed. ARC is a cyber-physical security solution that combines domain-specific anomaly detection and model-based mitigation to detect stealthy attacks on Automatic Generation Control (AGC). In this paper, we first describe the implementation architecture of the experiment on the testbed. Next, we demonstrate the capability of stealthy attack templates to cause forced under-frequency load shedding in a 3-area test system. We then validate the performance of ARC by measuring its ability to detect and mitigate these attacks. Our results reveal that ARC is efficient in detecting stealthy attacks and enables AGC to maintain system operating frequency close to its nominal value during an attack. Our studies also highlight the importance of testbed-based experimentation for evaluating the performance of cyber-physical security and control applications.

  8. Design, Implementation, and Performance Evaluation of Efficient PMIPv6 Based Mobile Multicast Sender Support Schemes

    Directory of Open Access Journals (Sweden)

    Lili Wang

    2015-01-01

    Full Text Available Proxy Mobile IPv6 (PMIPv6 is proposed as a promising network-based mobility management protocol, which does not need any participation of mobile nodes. PMIPv6 does not support the multicast well and most of the current research concentrates on the mobile multicast receiver. However, the mobile multicast sender is also very important and challenging, which has not been addressed well. Therefore, in this paper we propose two efficient PMIPv6 based mobile multicast sender support schemes which are PMIP bidirectional tunneling (PMIP-BT and PMIP direct routing (PMIP-DR. In the PMIP-BT, the multicast traffic can be delivered through the PMIPv6 bidirectional tunnel, while, in the PMIP-DR, the multicast data can be transmitted via an optimized direct multicast routing. Both of them can support the multicast sender mobility transparently enabled in the PMIPv6 networks. We evaluate the performance of the proposed schemes by theoretical analysis, and the numerical results show that the proposed schemes have a better performance in terms of the signaling cost than the current schemes. Meanwhile, the proposed schemes are also implemented on the test bed, and the experimental results not only verify the validity and feasibility of our proposed schemes, but also conclude the different scenarios to which they are applicable.

  9. Performance evaluation of a hand-held, semiconductor (CdZnTe)-based gamma camera

    CERN Document Server

    Abe, A; Lee, J; Oka, T; Shizukuishi, K; Kikuchi, T; Inoue, T; Jimbo, M; Ryuo, H; Bickel, C

    2003-01-01

    We have designed and developed a small field of view gamma camera, the eZ SCOPE, based on use of a CdZnTe semiconductor. This device utilises proprietary signal processing technology and an interface to a computer-based imaging system. The purpose of this study was to evaluate the performance of the eZ scope in comparison with currently employed gamma camera technology. The detector is a single wafer of 5-mm-thick CdZnTe that is divided into a 16 x 16 array (256 pixels). The sensitive area of the detector is a square of dimension 3.2 cm. Two parallel-hole collimators are provided with the system and have a matching (256 hole) pattern to the CdZnTe detector array: a low-energy, high-resolution parallel-hole (LEHR) collimator fabricated of lead and a low-energy, high-sensitivity parallel-hole (LEHS) collimator fabricated of tungsten. Performance measurements and the data analysis were done according to the procedures of the NEMA standard. We also studied the long-term stability of the system with continuous use...

  10. Comparative Performance Evaluation of Orthogonal-Signal-Generators-Based Single-Phase PLL Algorithms

    DEFF Research Database (Denmark)

    Han, Yang; Luo, Mingyu; Zhao, Xin;

    2016-01-01

    The orthogonal signal generator based phase-locked loops (OSG-PLLs) are among the most popular single-phase PLLs within the areas of power electronics and power systems, mainly because they are often easy to be implement and offer a robust performance against the grid disturbances. The main aim...... of this paper is to present a survey of the comparative performance evaluation among the state-of-the-art OSG-PLLs (include Delay-PLL, Deri-PLL, Park-PLL, SOGI-PLL, DOEC-PLL, VTD-PLL, CCF-PLL, and TPFA-PLL) under different grid disturbances such as voltage sags, phase and frequency jumps, and in the presence...... of dc offset, harmonic components, and white noise in their input. This analysis provides a useful insight about the advantages and disadvantages of these PLLs. The performance enhancement of Delay-PLL, Deri-PLL, and CCF-PLL by including a moving average (MAF) filter into their structure is another goal...

  11. Performance Evaluation of Fingerprint Identification Based on DCT and DWT using Multiple Matching Techniques

    Directory of Open Access Journals (Sweden)

    Lavanya B. N.

    2011-11-01

    Full Text Available The fingerprint is a physiological trait used to identify a person. In this paper, Performance Evaluation of Fingerprint Identification based on DCT and DWT using Multiple Matching Techniques (FDDMM is proposed. The fingerprint is segmented into four cells of each size 150*240. The DCT is applied on each cell. The Harr Wavelet is applied on DCT coefficient of each cell. The directional information features and centre area features are computed on LL sub band. The final Feature Vector is obtained by concatenating Directional Information and Centre Area Features. The matching techniques viz., ED, SVM, and RF are used to compare test image feature with database image features. It is observed that the values of TSR and FRR are better in the case of proposed algorithm compared to existing algorithm.

  12. Evaluating stream health based environmental justice model performance at different spatial scales

    Science.gov (United States)

    Daneshvar, Fariborz; Nejadhashemi, A. Pouyan; Zhang, Zhen; Herman, Matthew R.; Shortridge, Ashton; Marquart-Pyatt, Sandra

    2016-07-01

    This study evaluated the effects of spatial resolution on environmental justice analysis concerning stream health. The Saginaw River Basin in Michigan was selected since it is an area of concern in the Great Lakes basin. Three Bayesian Conditional Autoregressive (CAR) models (ordinary regression, weighted regression and spatial) were developed for each stream health measure based on 17 socioeconomic and physiographical variables at three census levels. For all stream health measures, spatial models had better performance compared to the two non-spatial ones at the census tract and block group levels. Meanwhile no spatial dependency was found at the county level. Multilevel Bayesian CAR models were also developed to understand the spatial dependency at the three levels. Results showed that considering level interactions improved models' prediction. Residual plots also showed that models developed at the block group and census tract (in contrary to county level models) are able to capture spatial variations.

  13. Simulation-Based Performance Evaluation of Predictive-Hashing Based Multicast Authentication Protocol

    Directory of Open Access Journals (Sweden)

    Seonho Choi

    2012-12-01

    Full Text Available A predictive-hashing based Denial-of-Service (DoS resistant multicast authentication protocol was proposed based upon predictive-hashing, one-way key chain, erasure codes, and distillation codes techniques [4, 5]. It was claimed that this new scheme should be more resistant to various types of DoS attacks, and its worst-case resource requirements were derived in terms of coarse-level system parameters including CPU times for signature verification and erasure/distillation decoding operations, attack levels, etc. To show the effectiveness of our approach and to analyze exact resource requirements in various attack scenarios with different parameter settings, we designed and implemented an attack simulator which is platformindependent. Various attack scenarios may be created with different attack types and parameters against a receiver equipped with the predictive-hashing based protocol. The design of the simulator is explained, and the simulation results are presented with detailed resource usage statistics. In addition, resistance level to various types of DoS attacks is formulated with a newly defined resistance metric. By comparing these results to those from another approach, PRABS [8], we show that the resistance level of our protocol is greatly enhanced even in the presence of many attack streams.

  14. Performance evaluation of RANS-based turbulence models in simulating a honeycomb heat sink

    Science.gov (United States)

    Subasi, Abdussamet; Ozsipahi, Mustafa; Sahin, Bayram; Gunes, Hasan

    2017-02-01

    As well-known, there is not a universal turbulence model that can be used to model all engineering problems. There are specific applications for each turbulence model that make it appropriate to use, and it is vital to select an appropriate model and wall function combination that matches the physics of the problem considered. Therefore, in this study, performance of six well-known Reynolds-Averaged Navier-Stokes (RANS) based turbulence models which are the Standard k - ɛ, the Renormalized Group k - ɛ, the Realizable k - ɛ, the Reynolds Stress Model, the k - ω and the Shear Stress Transport k - ω and accompanying wall functions which are the standard, the non-equilibrium and the enhanced are evaluated via 3D simulation of a honeycomb heat sink. The CutCell method is used to generate grid for the part including heat sink called test section while a hexahedral mesh is employed to discretize to inlet and outlet sections. A grid convergence study is conducted for verification process while experimental data and well-known correlations are used to validate the numerical results. Prediction of pressure drop along the test section, mean base plate temperature of the heat sink and temperature at the test section outlet are regarded as a measure of the performance of employed models and wall functions. The results indicate that selection of turbulence models and wall functions has a great influence on the results and, therefore, need to be selected carefully. Hydraulic and thermal characteristics of the honeycomb heat sink can be determined in a reasonable accuracy using RANS-based turbulence models provided that a suitable turbulence model and wall function combination is selected.

  15. Performance Evaluation of a Nanofluid-Based Direct Absorption Solar Collector with Parabolic Trough Concentrator

    Directory of Open Access Journals (Sweden)

    Guoying Xu

    2015-12-01

    Full Text Available Application of solar collectors for hot water supply, space heating, and cooling plays a significant role in reducing building energy consumption. For conventional solar collectors, solar radiation is absorbed by spectral selective coating on the collectors’ tube/plate wall. The poor durability of the coating can lead to an increased manufacturing cost and unreliability for a solar collector operated at a higher temperature. Therefore, a novel nanofluid-based direct absorption solar collector (NDASC employing uncoated collector tubes has been proposed, and its operating characteristics for medium-temperature solar collection were theoretically and experimentally studied in this paper. CuO/oil nanofluid was prepared and used as working fluid of the NDASC. The heat-transfer mechanism of the NDASC with parabolic trough concentrator was theoretically evaluated and compared with a conventional indirect absorption solar collector (IASC. The theoretical analysis results suggested that the fluid’s temperature distribution in the NDASC was much more uniform than that in the IASC, and an enhanced collection efficiency could be achieved for the NDASC operated within a preferred working temperature range. To demonstrate the feasibility of the proposed NDASC, experimental performances of an NDASC and an IASC with the same parabolic trough concentrator were furthermore evaluated and comparatively discussed.

  16. A fuzzy MCDM approach for evaluating school performance based on linguistic information

    Science.gov (United States)

    Musani, Suhaina; Jemain, Abdul Aziz

    2013-11-01

    Decision making is the process of finding the best option among the feasible alternatives. This process should consider a variety of criteria, but this study only focus on academic achievement. The data used is the percentage of candidates who obtained Malaysian Certificate of Education (SPM) in Melaka based on school academic achievement for each subject. 57 secondary schools in Melaka as listed by the Ministry of Education involved in this study. Therefore the school ranking can be done using MCDM (Multi Criteria Decision Making) methods. The objective of this study is to develop a rational method for evaluating school performance based on linguistic information. Since the information or level of academic achievement provided in linguistic manner, there is a possible chance of getting incomplete or uncertain problems. So in order to overcome the situation, the information could be provided as fuzzy numbers. Since fuzzy set represents the uncertainty in human perceptions. In this research, VIKOR (Multi Criteria Optimization and Compromise Solution) has been used as a MCDM tool for the school ranking process in fuzzy environment. Results showed that fuzzy set theory can solve the limitations of using MCDM when there is uncertainty problems exist in the data.

  17. Videoconferencing of a national program for residents on evidence-based practice: early performance evaluation.

    LENUS (Irish Health Repository)

    O'Regan, Kevin

    2010-01-01

    The aim of this study was to evaluate the effectiveness of the medium of videoconferencing for the delivery of a course for radiology residents in practice-based learning (PBL), including evidence-based practice, at centers geographically separated from the principal teaching site.

  18. Vender Performance Evaluation.

    Science.gov (United States)

    Grant, Joan; Perelmuter, Susan

    1978-01-01

    Vendor selection can mean success or failure of an approval plan; this study evaluates three book vendors by comparing their plans on the bases of speed, bibliographic accuracy, and discounts. (Author/CWM)

  19. Performance Evaluation of Closed-Loop Spatial Multiplexing Codebook Based on Indoor MIMO Channel Measurement

    Directory of Open Access Journals (Sweden)

    Junjun Gao

    2012-01-01

    Full Text Available Closed-loop MIMO technique standardized in LTE can support different layer transmissions through precoding operation to match the channel multiplexing capability. However, the performance of the limited size codebook still needs to be evaluated in real channel environment for further insights. Based on the wideband MIMO channel measurement in a typical indoor scenario, capacity loss (CL of the limited size codebook relative to perfect precoding is studied first in two extreme channel conditions. The results show that current codebook design for single layer transmission is nearly capacity lossless, and the CL will increase with the number of transmitted layers. Furthermore, the capacity improvement of better codebook selection criterions is very limited compared to CL. Then we define the maximum capacity boost achieved by frequency domain layer adaption (FDLA and investigate its sensitivity to SNR and channel condition. To survey the effect of frequency domain channel variation on MIMO-OFDM system, we define a function to measure the fluctuation levels of the key channel metrics within a subband and reveal the inherent relationship between them. Finally, a capacity floor resulted as the feedback interval increases in frequency domain.

  20. Performance Evaluation of Mesh based Multicast Reactive Routing Protocol under Black Hole Attack

    CERN Document Server

    Anita, E A Mary

    2009-01-01

    A mobile ad-hoc network is an autonomous system of mobile nodes connected by wireless links in which nodes cooperate by forwarding packets for each other thereby enabling communication beyond direct wireless transmission range. The wireless and dynamic nature of ad-hoc networks makes them vulnerable to attacks especially in routing protocols. Providing security in mobile ad-hoc networks has been a major issue over the recent years. One of the prominent mesh base reactive multicast routing protocols used in ad-hoc networks is On Demand Multicast Routing protocol (ODMRP). The security of ODMRP is compromised by a primary routing attack called black hole attack. In this attack a malicious node advertises itself as having the shortest path to the node whose packets it wants to intercept. This paper discusses the impact of black hole attack on ODMRP under various scenarios. The performance is evaluated using metrics such as packet delivery ratio and end to end delay for various numbers of senders and receivers via...

  1. Design and Performance Evaluation of a Distributed OFDMA-Based MAC Protocol for MANETs

    Directory of Open Access Journals (Sweden)

    Jaesung Park

    2014-01-01

    Full Text Available In this paper, we propose a distributed MAC protocol for OFDMA-based wireless mobile ad hoc multihop networks, in which the resource reservation and data transmission procedures are operated in a distributed manner. A frame format is designed considering the characteristics of OFDMA that each node can transmit or receive data to or from multiple nodes simultaneously. Under this frame structure, we propose a distributed resource management method including network state estimation and resource reservation processes. We categorize five types of logical errors according to their root causes and show that two of the logical errors are inevitable while three of them are avoided under the proposed distributed MAC protocol. In addition, we provide a systematic method to determine the advertisement period of each node by presenting a clear relation between the accuracy of estimated network states and the signaling overhead. We evaluate the performance of the proposed protocol in respect of the reservation success rate and the success rate of data transmission. Since our method focuses on avoiding logical errors, it could be easily placed on top of the other resource allocation methods focusing on the physical layer issues of the resource management problem and interworked with them.

  2. Performance Evaluation of Rural Cooperative Economic Organizations in Hunan Province Based on Structural Equation

    Institute of Scientific and Technical Information of China (English)

    Naman; YANG

    2015-01-01

    Using the method of structural equation and balanced scorecard,this paper establishes the evaluation indicators and evaluation model for the performance of 21 rural cooperative economic organizations in X City of Hunan Province,and analyzes the relationship between indicators and dimensions of performance evaluation indicators,in order to find the influencing factors,obstacles and successful experience concerning the development of rural cooperative economic organizations. According to model analysis and conclusions,this paper sets forth the recommendations for promoting the development of rural cooperative economic organizations in Hunan Province,in order to provide a scientific basis for the institutional design and mechanism innovation of rural cooperative economic organizations in Hunan Province.

  3. PARALLEL IMPLEMENTATION OF CROSS-LAYER OPTIMIZATION - A PERFORMANCE EVALUATION BASED ON SWARM INTELLIGENCE

    Directory of Open Access Journals (Sweden)

    Vanaja Gokul

    2012-01-01

    Full Text Available In distributed systems real time optimizations need to be performed dynamically for better utilization of the network resources. Real time optimizations can be performed effectively by using Cross Layer Optimization (CLO within the network operating system. This paper presents the performance evaluation of Cross Layer Optimization (CLO in comparison with the traditional approach of Single-Layer Optimization (SLO. In the parallel implementation of the approaches the experimental study carried out indicates that the CLO results in a significant improvement in network utilization when compared to SLO. A variant of the Particle Swarm Optimization technique that utilizes Digital Pheromones (PSODP for better performance has been used here. A significantly higher speed up in performance was observed from the parallel implementation of CLO that used PSODP on a cluster of nodes.

  4. Validating the ACE Model for Evaluating Student Performance Using a Teaching-Learning Process Based on Computational Modeling Systems

    Science.gov (United States)

    Louzada, Alexandre Neves; Elia, Marcos da Fonseca; Sampaio, Fábio Ferrentini; Vidal, Andre Luiz Pestana

    2014-01-01

    The aim of this work is to adapt and test, in a Brazilian public school, the ACE model proposed by Borkulo for evaluating student performance as a teaching-learning process based on computational modeling systems. The ACE model is based on different types of reasoning involving three dimensions. In addition to adapting the model and introducing…

  5. Performance evaluation of railway blocking system based on markov chain and queuing theory

    Science.gov (United States)

    Guo, Jin; Chen, Hongxia; Yang, Yang

    2005-12-01

    Railway blocking system is the system with the high demanding of real-time performance. Firstly, the tasks and the time limits, which had to be handled for the blocking system, were introduced. The FCFS and the Markov chain were used to set the model for it. By analyzing the performance of the system with the FCFS model found out that it was not satisfied to the real-time performance. Secondly, NPPR model to evaluate the software real-time performance of the blocking processor was proposed. By evaluation, analysis and comparison, the results indicate that the NPPR model is prevail over the model of (M/M/1): (N/N/FCFS) in real-time performance. And the priorities of the tasks in the system should be given according to their time limit. With the principle of (M/M/1): (N/N/NPPR), if the priority was given to the tasks properly, the satisfied real-time performance will be gotten. The models were tested in forms software and the satisfied result has been gotten in practice.

  6. Measurement-Based Evaluation of Installed Filtration System Performance in Single-Family Homes

    Energy Technology Data Exchange (ETDEWEB)

    Chan, Wanyu Rengie; Singer, Brett C.

    2014-04-03

    This guide discusses important study design issues to consider when conducting an on-site evaluation of filtration system performance. The two most important dichotomies to consider in developing a study protocol are (1) whether systems are being evaluated in occupied or unoccupied homes and (2) whether different systems are being compared in the same homes or if the comparison is between systems installed in different homes. This document provides perspective and recommendations about a suite of implementation issues including the choice of particle measurement devices, selection of sampling locations, ways to control and/or monitor factors and processes that can impact particle concentrations, and data analysis approaches.

  7. Computational Principle and Performance Evaluation of Coherent Ising Machine Based on Degenerate Optical Parametric Oscillator Network

    Directory of Open Access Journals (Sweden)

    Yoshitaka Haribara

    2016-04-01

    Full Text Available We present the operational principle of a coherent Ising machine (CIM based on a degenerate optical parametric oscillator (DOPO network. A quantum theory of CIM is formulated, and the computational ability of CIM is evaluated by numerical simulation based on c-number stochastic differential equations. We also discuss the advanced CIM with quantum measurement-feedback control and various problems which can be solved by CIM.

  8. Performance Evaluation Process.

    Science.gov (United States)

    1998

    This document contains four papers from a symposium on the performance evaluation process and human resource development (HRD). "Assessing the Effectiveness of OJT (On the Job Training): A Case Study Approach" (Julie Furst-Bowe, Debra Gates) is a case study of the effectiveness of OJT in one of a high-tech manufacturing company's product…

  9. Performance evaluation of vegetable-based oils in drilling austenitic stainless steel

    DEFF Research Database (Denmark)

    Belluco, Walter; De Chiffre, Leonardo

    2004-01-01

    The efficiency of six cutting oils was evaluated in drilling AISI 316L austenitic stainless steel using conventional HSS-Co tools by measurements of tool life, tool wear, cutting forces and chip formation. Seven tools were tested with each fluid to catastrophic failure. Cutting forces and chip...... in a measurement capability comparable to that obtained using tool life as a performance criterion. As a consequence, it is suggested that drilling thrust can be used to assess the performance of cutting fluids in drilling stainless steel, resulting in considerable time savings and cost reduction with respect...

  10. Analytical Evaluation of the Performance of Proportional Fair Scheduling in OFDMA-Based Wireless Systems

    Directory of Open Access Journals (Sweden)

    Mohamed H. Ahmed

    2012-01-01

    Full Text Available This paper provides an analytical evaluation of the performance of proportional fair (PF scheduling in Orthogonal Frequency-Division Multiple Access (OFDMA wireless systems. OFDMA represents a promising multiple access scheme for transmission over wireless channels, as it combines the orthogonal frequency division multiplexing (OFDM modulation and subcarrier allocation. On the other hand, the PF scheduling is an efficient resource allocation scheme with good fairness characteristics. Consequently, OFDMA with PF scheduling represents an attractive solution to deliver high data rate services to multiple users simultaneously with a high degree of fairness. We investigate a two-dimensional (time slot and frequency subcarrier PF scheduling algorithm for OFDMA systems and evaluate its performance analytically and by simulations. We derive approximate closed-form expressions for the average throughput, throughput fairness index, and packet delay. Computer simulations are used for verification. The analytical results agree well with the results from simulations, which show the good accuracy of the analytical expressions.

  11. Rock Drilling Performance Evaluation by an Energy Dissipation Based Rock Brittleness Index

    Science.gov (United States)

    Munoz, H.; Taheri, A.; Chanda, E. K.

    2016-08-01

    To reliably estimate drilling performance both tool-rock interaction laws along with a proper rock brittleness index are required to be implemented. In this study, the performance of a single polycrystalline diamond compact (PDC) cutter cutting and different drilling methods including PDC rotary drilling, roller-cone rotary drilling and percussive drilling were investigated. To investigate drilling performance by rock strength properties, laboratory PDC cutting tests were performed on different rocks to obtain cutting parameters. In addition, results of laboratory and field drilling on different rocks found elsewhere in literature were used. Laboratory and field cutting and drilling test results were coupled with values of a new rock brittleness index proposed herein and developed based on energy dissipation withdrawn from the complete stress-strain curve in uniaxial compression. To quantify cutting and drilling performance, the intrinsic specific energy in rotary-cutting action, i.e. the energy consumed in pure cutting action, and drilling penetration rate values in percussive action were used. The results show that the new energy-based brittleness index successfully describes the performance of different cutting and drilling methods and therefore is relevant to assess drilling performance for engineering applications.

  12. An Application-Based Performance Evaluation of NASAs Nebula Cloud Computing Platform

    Science.gov (United States)

    Saini, Subhash; Heistand, Steve; Jin, Haoqiang; Chang, Johnny; Hood, Robert T.; Mehrotra, Piyush; Biswas, Rupak

    2012-01-01

    The high performance computing (HPC) community has shown tremendous interest in exploring cloud computing as it promises high potential. In this paper, we examine the feasibility, performance, and scalability of production quality scientific and engineering applications of interest to NASA on NASA's cloud computing platform, called Nebula, hosted at Ames Research Center. This work represents the comprehensive evaluation of Nebula using NUTTCP, HPCC, NPB, I/O, and MPI function benchmarks as well as four applications representative of the NASA HPC workload. Specifically, we compare Nebula performance on some of these benchmarks and applications to that of NASA s Pleiades supercomputer, a traditional HPC system. We also investigate the impact of virtIO and jumbo frames on interconnect performance. Overall results indicate that on Nebula (i) virtIO and jumbo frames improve network bandwidth by a factor of 5x, (ii) there is a significant virtualization layer overhead of about 10% to 25%, (iii) write performance is lower by a factor of 25x, (iv) latency for short MPI messages is very high, and (v) overall performance is 15% to 48% lower than that on Pleiades for NASA HPC applications. We also comment on the usability of the cloud platform.

  13. Evaluation of Teaching Performance: Considerations from the Competency-Based Approach

    Directory of Open Access Journals (Sweden)

    Mario Rueda Beltrán

    2009-11-01

    Full Text Available The article gives an overview of the main arguments and characteristics attributed to the Competency-based Approach in education, so as to analyze the various definitions available and some of the proposals on the subject of teaching skills. Approaches and strategies are suggested for developing teacher-evaluation programs in the context of a generalized environment in the educational sector which is adopting the model of competencies for school reform, curriculum redesign, modifications in teaching strategies, and manners and functions of evaluation.

  14. Performance Evaluation of Electronic Inductor-Based Adjustable Speed Drives with Respect to Line Current Interharmonics

    DEFF Research Database (Denmark)

    Soltani, Hamid; Davari, Pooya; Zare, Firuz;

    2017-01-01

    attractive due to its improved harmonic performance compared to a conventional ASD. In this digest, the input currents of the EI-based ASD are investigated and compared with the conventional ASDs with respect to interharmonics, which is an emerging power quality topic. First, the main causes...

  15. Distributed Space Mission Design for Earth Observation Using Model-Based Performance Evaluation

    Science.gov (United States)

    Nag, Sreeja; LeMoigne-Stewart, Jacqueline; Cervantes, Ben; DeWeck, Oliver

    2015-01-01

    Distributed Space Missions (DSMs) are gaining momentum in their application to earth observation missions owing to their unique ability to increase observation sampling in multiple dimensions. DSM design is a complex problem with many design variables, multiple objectives determining performance and cost and emergent, often unexpected, behaviors. There are very few open-access tools available to explore the tradespace of variables, minimize cost and maximize performance for pre-defined science goals, and therefore select the most optimal design. This paper presents a software tool that can multiple DSM architectures based on pre-defined design variable ranges and size those architectures in terms of predefined science and cost metrics. The tool will help a user select Pareto optimal DSM designs based on design of experiments techniques. The tool will be applied to some earth observation examples to demonstrate its applicability in making some key decisions between different performance metrics and cost metrics early in the design lifecycle.

  16. Evaluation of a Performance-Based Expert Elicitation: WHO Global Attribution of Foodborne Diseases.

    Science.gov (United States)

    Aspinall, W P; Cooke, R M; Havelaar, A H; Hoffmann, S; Hald, T

    2016-01-01

    For many societally important science-based decisions, data are inadequate, unreliable or non-existent, and expert advice is sought. In such cases, procedures for eliciting structured expert judgments (SEJ) are increasingly used. This raises questions regarding validity and reproducibility. This paper presents new findings from a large-scale international SEJ study intended to estimate the global burden of foodborne disease on behalf of WHO. The study involved 72 experts distributed over 134 expert panels, with panels comprising thirteen experts on average. Elicitations were conducted in five languages. Performance-based weighted solutions for target questions of interest were formed for each panel. These weights were based on individual expert's statistical accuracy and informativeness, determined using between ten and fifteen calibration variables from the experts' field with known values. Equal weights combinations were also calculated. The main conclusions on expert performance are: (1) SEJ does provide a science-based method for attribution of the global burden of foodborne diseases; (2) equal weighting of experts per panel increased statistical accuracy to acceptable levels, but at the cost of informativeness; (3) performance-based weighting increased informativeness, while retaining accuracy; (4) due to study constraints individual experts' accuracies were generally lower than in other SEJ studies, and (5) there was a negative correlation between experts' informativeness and statistical accuracy which attenuated as accuracy improved, revealing that the least accurate experts drive the negative correlation. It is shown, however, that performance-based weighting has the ability to yield statistically accurate and informative combinations of experts' judgments, thereby offsetting this contrary influence. The present findings suggest that application of SEJ on a large scale is feasible, and motivate the development of enhanced training and tools for remote

  17. A string matching based algorithm for performance evaluation of mathematical expression recognition

    Indian Academy of Sciences (India)

    P Pavan Kumar; Arun Agarwal; Chakravarthy Bhagvati

    2014-02-01

    In this paper, we have addressed the problem of automated performance evaluation of Mathematical Expression (ME) recognition. Automated evaluation requires that recognition output and ground truth in some editable format like LaTeX, MathML, etc. have to be matched. But standard forms can have extraneous symbols or tags. For example, tag is added for an operator in MathML and \\begin{array} is used to encoded matrices in LaTeX. These extraneous symbols are also involved in matching that is not intuitive. For that, we have proposed a novel structure encoded string representation that is independent of any editable format. Structure encoded strings retain the structure (spatial relationships like superscript, subscript, etc.) and do not contain any extraneous symbols. As structure encoded strings give the linear representation of MEs, Levenshtein edit distance is used as a measure for performance evaluation. Therefore, in our approach, recognition output and ground truth in LaTeX form are converted to their corresponding structure encoded strings and Levenshtein edit distance is computed between them.

  18. Performance Evaluation of Large Aperture 'Polished Panel' Optical Receivers Based on Experimental Data

    Science.gov (United States)

    Vilnrotter, Victor

    2013-01-01

    Recent interest in hybrid RF/Optical communications has led to the development and installation of a "polished-panel" optical receiver evaluation assembly on the 34-meter research antenna at Deep-Space Station 13 (DSS-13) at NASA's Goldstone Communications Complex. The test setup consists of a custom aluminum panel polished to optical smoothness, and a large-sensor CCD camera designed to image the point-spread function (PSF) generated by the polished aluminum panel. Extensive data has been obtained via realtime tracking and imaging of planets and stars at DSS-13. Both "on-source" and "off-source" data were recorded at various elevations, enabling the development of realistic simulations and analytic models to help determine the performance of future deep-space communications systems operating with on-off keying (OOK) or pulse-position-modulated (PPM) signaling formats with photon-counting detection, and compared with the ultimate quantum bound on detection performance for these modulations. Experimentally determined PSFs were scaled to provide realistic signal-distributions across a photon-counting detector array when a pulse is received, and uncoded as well as block-coded performance analyzed and evaluated for a well-known class of block codes.

  19. Developing Research on Performance-Based Functional Work Assessment : Report on the First International Functional Capacity Evaluation Research Meeting

    NARCIS (Netherlands)

    Reneman, M. F.; Soer, R.; Gross, D. P.

    2013-01-01

    Introduction Research on Performance-Based Work Assessment, also known as Functional Capacity Evaluation (FCE), has evolved substantially over the past decades. Although this field of research has developed, the use of FCE has been an object of discussion and debate internationally. Unfortunately, t

  20. BER Performance Evaluation of two Types of Antenna Array-Based Receivers in a Multipath Channel

    Directory of Open Access Journals (Sweden)

    Rim Haddad

    2010-11-01

    Full Text Available Smart antennasystems have received much attention in the last few years because they can increasesystem capacity by dynamically tuning out interference while focusing on the intended user.In this paper, we focused our research on the performance of two kinds of smart antenna receivers. Ananalytical model is proposed for evaluating the BER performance using a closed-form expression. Also,for the adaptive array, a simple way to account the multi-access interference can be exploited to evaluatethe average probability of error when the users are randomly distributed within an angular sector.The proposed model confirms the benefits of adaptive antennas in reducing the overall interference level(intercell/intracell and to find an accurate approximation of the error probability.In the two kinds of receivers, we assessed the impact of smart antenna systems and we considered thecase of conventional single antenna receiver model as reference (single user/single antenna.

  1. Performance Evaluation of a NEXRAD-Based Flood Warning during Recent Events in 2012

    Science.gov (United States)

    Fang, N.; Bedient, P.

    2012-12-01

    More weather radar applications have been used to provide accurate precipitation information for flood warning purposes because radar tends to have wider spatial and temporal coverage over the conventional monitoring networks. Thus the radar-based flood warning systems as great tools have become more prevalent in the past decades to provide the information necessary to mobilize the evacuation of people and property prior to flooding in critical areas The Rice University and the Texas Medical Center (TMC) Flood Alert System (FAS) has been providing important warning information for the critical medical facilities for more than 40 events since 1997. The current FAS utilizes NEXRAD Level II radar rainfall data coupled with a real-time hydrologic model (RTHEC-1) to deliver warning information with 2 to 3 hours of lead time and a forecast R2 value of 93% to facility personnel in readily understood format. The latest version - FAS3 has a user-friendly dashboard to provide rainfall maps, Google Maps based inundation maps, hydrologic predictions, and real-time monitoring at the bayou. This paper will discuss its reliable performance during the recent events occurring in 2012. Due to its excellent performance, Texas Medical Center has included FAS3 into their FEMA Success Story as a good example to demonstrate the significant value of the radar-based flood warning system. Currently, the radar-based flood alert system has been used as a platform to develop for other flood-prone areas in Texas.

  2. Evaluation of a Performance-Based Expert Elicitation: WHO Global Attribution of Foodborne Diseases

    DEFF Research Database (Denmark)

    Aspinall, W. P.; Cooke, R. M.; Havelaar, A. H.;

    2016-01-01

    For many societally important science-based decisions, data are inadequate, unreliable or non-existent, and expert advice is sought. In such cases, procedures for eliciting structured expert judgments (SEJ) are increasingly used. This raises questions regarding validity and reproducibility....... This paper presents new findings from a large-scale international SEJ study intended to estimate the global burden of foodborne disease on behalf of WHO. The study involved 72 experts distributed over 134 expert panels, with panels comprising thirteen experts on average. Elicitations were conducted in five...... languages. Performance-based weighted solutions for target questions of interest were formed for each panel. These weights were based on individual expert's statistical accuracy and informativeness, determined using between ten and fifteen calibration variables from the experts' field with known values...

  3. Dynamic modeling and performance evaluation of axial flux PMSG based wind turbine system with MPPT control

    Directory of Open Access Journals (Sweden)

    Vahid Behjat

    2014-12-01

    Full Text Available This research work develops dynamic model of a gearless small scale wind power generation system based on a direct driven single sided outer rotor AFPMSG with coreless armature winding. Dynamic modeling of the AFPMSG based wind turbine requires machine parameters. To this end, a 3D FEM model of the generator is developed and from magnetostatic and transient analysis of the FEM model, machine parameters are calculated and utilized in dynamic modeling of the system. A maximum power point tracking (MPPT-based FOC control approach is used to obtain maximum power from the variable wind speed. The simulation results show the proper performance of the developed dynamic model of the AFPMSG, control approach and power generation system.

  4. A novel model for cost performance evaluation of pulverized coal injected into blast furnace based on effective calorific value

    Institute of Scientific and Technical Information of China (English)

    徐润生; 张建良; 左海滨; 李克江; 宋腾飞; 邵久刚

    2015-01-01

    The combustion process of pulverized coal injected into blast furnace involves a lot of physical and chemical reactions. Based on the combustion behaviors of pulverized coal, the conception of coal effective calorific value representing the actual thermal energy provided for blast furnace was proposed. A cost performance evaluation model of coal injection was built up for the optimal selection of various kinds of coal based on effective calorific value. The model contains two indicators: coal effective calorific value which has eight sub-indicators and coal injection cost which includes four sub-indicators. In addition, the calculation principle and application of cost performance evaluation model in a Chinese large-scale iron and steel company were comprehensively introduced. The evaluation results finally confirm that this novel model is of great significance to the optimal selection of blast furnace pulverized coal.

  5. Performance Evaluation of China’s Agricultural Listed Companies Based on DEA Model

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    In order to evaluate the performance of China’s agricultural listed companies,we analyze the overall efficiency,pure technical efficiency and scale efficiency of China’s agricultural listed companies on the basis of input-output data concerning 34 agricultural listed companies,using BCC model in data envelopment analysis ( DEA) model. Then we analyze input-output redundancy situation using the slack variable derived from the model. The results show that the overall efficiency of China’s agricultural listed companies is good,and the gap in efficiency between sub-industries is small; there is significant difference in performance between listed companies engaged in the same sub-industry,and the reason for invalid DEA in companies within the industry is complex; total assets and asset-liability ratio are high,and the effective output is not fully realized. Finally corresponding recommendations are put forward for promoting the performance of agricultural listed companies as follows: strengthening brand awareness; promoting the level of production technology; adjusting the input structure; transforming the agricultural growth mode.

  6. About performance and evaluation of employee performance

    Directory of Open Access Journals (Sweden)

    Irinel MARIN

    2009-12-01

    Full Text Available The goal of this article is the importance of the performance and the performance evaluation in any company. Performance can be viewed as being in close relationship with the effort made by the employee, his ability, charging station or place and role within the organization. Performance refers to the contribution that employees make to the goals of the organization. While the performance evaluation is an activity which determine an organization in which employees perform their duties or their responsibilities. Performance evaluation is required in a company because it represents a process of employee motivation and development.

  7. A Performance/Cost Evaluation for a GPU-Based Drug Discovery Application on Volunteer Computing

    Directory of Open Access Journals (Sweden)

    Ginés D. Guerrero

    2014-01-01

    Full Text Available Bioinformatics is an interdisciplinary research field that develops tools for the analysis of large biological databases, and, thus, the use of high performance computing (HPC platforms is mandatory for the generation of useful biological knowledge. The latest generation of graphics processing units (GPUs has democratized the use of HPC as they push desktop computers to cluster-level performance. Many applications within this field have been developed to leverage these powerful and low-cost architectures. However, these applications still need to scale to larger GPU-based systems to enable remarkable advances in the fields of healthcare, drug discovery, genome research, etc. The inclusion of GPUs in HPC systems exacerbates power and temperature issues, increasing the total cost of ownership (TCO. This paper explores the benefits of volunteer computing to scale bioinformatics applications as an alternative to own large GPU-based local infrastructures. We use as a benchmark a GPU-based drug discovery application called BINDSURF that their computational requirements go beyond a single desktop machine. Volunteer computing is presented as a cheap and valid HPC system for those bioinformatics applications that need to process huge amounts of data and where the response time is not a critical factor.

  8. Improved methods for evaluating base temperature for use in building energy performance lines

    Energy Technology Data Exchange (ETDEWEB)

    Day, A.R. [London South Bank Univ., London (United Kingdom); Knight, I.; Dunn, G. [Welsh School of Architecture, Cardiff (United Kingdom); Gaddas, R. [Interserve Facilities Management Ltd., Carlisle (United Kingdom)

    2003-12-01

    The use of degree-days in building energy monitoring and targeting has often given rise to misinterpretation of results, which has in turn undermined confidence in such techniques. Anecdotal reporting has, by turns, suggested the use of degree-days either works very well, or does not work at all. This ambiguous position is not helpful to energy managers who need robust tools and clear guidance on their use. This paper presents evidence to show how energy/degree-day correlations i.e., building performance lines, can be properly identified, while taking account of the correct (and practical) energy balance of the building. In doing so it shows how the correct building base temperature can be identified from reduced data sets, while demonstrating that such a practice is desirable. Performance lines constructed in this way, where appropriate, give rise to greater accuracy and reliability of results, while forming the basis for improved diagnostics. (Author)

  9. NONH:A New Cache—Based Coherence Protocol for Linked List Structure DSM System and Its Performance Evaluation

    Institute of Scientific and Technical Information of China (English)

    房至一; 鞠九滨

    1996-01-01

    The management of memory coherence is an important problem in distributed shared memory(DSM)system.In a cache-based coherence DSM system using linked list structure,the key to maintaining the coherence and improving system performance is how to manage the owner in the linked list.This paper presents the design of a new management protocol-NONH(New-Owner New-Head)and its performance evaluation.The analysis results show that this protocol can improve the scalability and performence of a coherent DSM system using linked list.It is also suitable for managing the cache coherency in tree-like hierarchical architecture.

  10. Performance evaluation of a shell and tube heat exchanger operated with oxide based nanofluids

    Science.gov (United States)

    Shahrul, I. M.; Mahbubul, I. M.; Saidur, R.; Khaleduzzaman, S. S.; Sabri, M. F. M.

    2016-08-01

    This study is about the performance evaluation of a shell and tube heat exchanger operated with nanofluid. Thermal conductivity, viscosity, and density of the nanofluids were increased, but the specific heat of the nanofluids was decreased with increasing the concentrations of the particles. The convective heat transfer coefficient was found to be 2-15 % higher than that of water at 50 kg/min of both side fluid. Nevertheless, energy effectiveness has improved about 23-52 % for the above-mentioned nanofluids. As, energy effectiveness (ɛ) is strongly depends on the density and specific heat of the operating fluids therefore, maximum ɛ has obtained for ZnO-W nanofluid and lowest found for SiO2-W nanofluid.

  11. Performance evaluation of a lossy transmission lines based diode detector at cryogenic temperature

    Science.gov (United States)

    Villa, E.; Aja, B.; de la Fuente, L.; Artal, E.

    2016-01-01

    This work is focused on the design, fabrication, and performance analysis of a square-law Schottky diode detector based on lossy transmission lines working under cryogenic temperature (15 K). The design analysis of a microwave detector, based on a planar gallium-arsenide low effective Schottky barrier height diode, is reported, which is aimed for achieving large input return loss as well as flat sensitivity versus frequency. The designed circuit demonstrates good sensitivity, as well as a good return loss in a wide bandwidth at Ka-band, at both room (300 K) and cryogenic (15 K) temperatures. A good sensitivity of 1000 mV/mW and input return loss better than 12 dB have been achieved when it works as a zero-bias Schottky diode detector at room temperature, increasing the sensitivity up to a minimum of 2200 mV/mW, with the need of a DC bias current, at cryogenic temperature.

  12. PERFORMANCE EVALUATION OF C-FUZZY DECISION TREE BASED IDS WITH DIFFERENT DISTANCE MEASURES

    Directory of Open Access Journals (Sweden)

    Vinayak Mantoor

    2012-01-01

    Full Text Available With the ever-increasing growth of computer networks and emergence of electronic commerce in recent years, computer security has become a priority. Intrusion detection system (IDS is often used as another wall of protection in addition to intrusion prevention techniques. This paper introduces a concept and design of decision trees based on Fuzzy clustering. Fuzzy clustering is the core functional part of the overall decision tree development and the developed tree will be referred to as C-fuzzy decision trees. Distance measure plays an important role in clustering data points. Choosing the right distance measure for a given dataset is a non-trivial problem. In this paper, we study the performance of C-fuzzy decision tree based IDS with different distance measures. We analyzed the results of our study using KDD Cup 1999 data and compared the accuracy of the classifier with different distance measures.

  13. Construction of Performance Evaluation Index System for Enterprises Implementing Green Food Certification Based on BSC

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    According to the investigation results of 70 green food enterprises in Sichuan Province,the strategic targets of enterprises implementing green food certification are discussed by borrowing ideas from the Balanced Score Card.Balanced Score Card index system is selected and improved according to the changes of enterprises before and after implementing the green food certification system.Then,the performance evaluation index system of enterprises implementing green food certification is established.This index system has five strategic directions of finance,customer,internal management,social ecology,and learning and growth,and has 11 strategic targets,such as increasing operating profit,expanding market,improving the quality of staff,improving the production technology level,enhancing the core competence of enterprises,ensuring food safety,improving the physical quality of human,and protecting ecological environment.According to the principles of guidance,scientificity,comparability,feasibility,and significance,a total of 24 evaluation indices are established,including the change of product cost,change of product sales revenue,change of profit rate,change of return on investment,change of internal and external lost cost,change of the proportion of certified products in total sales and so on.

  14. Performance Evaluation and Online Realization of Data-driven Normalization Methods Used in LC/MS based Untargeted Metabolomics Analysis.

    Science.gov (United States)

    Li, Bo; Tang, Jing; Yang, Qingxia; Cui, Xuejiao; Li, Shuang; Chen, Sijie; Cao, Quanxing; Xue, Weiwei; Chen, Na; Zhu, Feng

    2016-12-13

    In untargeted metabolomics analysis, several factors (e.g., unwanted experimental &biological variations and technical errors) may hamper the identification of differential metabolic features, which requires the data-driven normalization approaches before feature selection. So far, ≥16 normalization methods have been widely applied for processing the LC/MS based metabolomics data. However, the performance and the sample size dependence of those methods have not yet been exhaustively compared and no online tool for comparatively and comprehensively evaluating the performance of all 16 normalization methods has been provided. In this study, a comprehensive comparison on these methods was conducted. As a result, 16 methods were categorized into three groups based on their normalization performances across various sample sizes. The VSN, the Log Transformation and the PQN were identified as methods of the best normalization performance, while the Contrast consistently underperformed across all sub-datasets of different benchmark data. Moreover, an interactive web tool comprehensively evaluating the performance of 16 methods specifically for normalizing LC/MS based metabolomics data was constructed and hosted at http://server.idrb.cqu.edu.cn/MetaPre/. In summary, this study could serve as a useful guidance to the selection of suitable normalization methods in analyzing the LC/MS based metabolomics data.

  15. Performance evaluation of wavelet-based face verification on a PDA recorded database

    Science.gov (United States)

    Sellahewa, Harin; Jassim, Sabah A.

    2006-05-01

    The rise of international terrorism and the rapid increase in fraud and identity theft has added urgency to the task of developing biometric-based person identification as a reliable alternative to conventional authentication methods. Human Identification based on face images is a tough challenge in comparison to identification based on fingerprints or Iris recognition. Yet, due to its unobtrusive nature, face recognition is the preferred method of identification for security related applications. The success of such systems will depend on the support of massive infrastructures. Current mobile communication devices (3G smart phones) and PDA's are equipped with a camera which can capture both still and streaming video clips and a touch sensitive display panel. Beside convenience, such devices provide an adequate secure infrastructure for sensitive & financial transactions, by protecting against fraud and repudiation while ensuring accountability. Biometric authentication systems for mobile devices would have obvious advantages in conflict scenarios when communication from beyond enemy lines is essential to save soldier and civilian life. In areas of conflict or disaster the luxury of fixed infrastructure is not available or destroyed. In this paper, we present a wavelet-based face verification scheme that have been specifically designed and implemented on a currently available PDA. We shall report on its performance on the benchmark audio-visual BANCA database and on a newly developed PDA recorded audio-visual database that take include indoor and outdoor recordings.

  16. Vehicle dynamic performance evaluation based on 'Kansei'; Kansei ni motozuku sharyo unten seino hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Kihara, M.; Kato, F.; Matsuura, K. [Nissan Motor Co. Ltd., Tokyo (Japan)

    1999-06-01

    Outlined herein are vehicle dynamic performance (operability, stability, ride comfort, etc) evaluation based on senses. The lower senses are the primary senses directly felt by the five senses. However, the evaluation described here is based on the complex senses which are excited by the primary senses and are difficult to directly measure. The analysis by the basic mechanical characteristics (e.g., primary senses, pitching and rolling) is necessary. It is also necessary to set and develop the primary and quasi-primary senses which constitute the complex senses (e.g., relaxed feeling), for which drivers' opinions should be collected. Roles, necessary ability, etc of drivers are listed up. In the planning stage, the company's cars are compared with a number of reference cars produced by the other makers by the evaluations based on the senses. The characteristics are comprehensively evaluated by, e.g., driving cars on special modes for specific test objectives and classifying the overall characteristics into components. Cars are driven accurately and smoothly, to reproduce the phenomena concerned. The overall evaluations are attempted, based on automotive engineering knowledge and evaluation experiences. (NEDO)

  17. Criteria for performance evaluation

    Directory of Open Access Journals (Sweden)

    David J. Weiss

    2009-03-01

    Full Text Available Using a cognitive task (mental calculation and a perceptual-motor task (stylized golf putting, we examined differential proficiency using the CWS index and several other quantitative measures of performance. The CWS index (Weiss and Shanteau, 2003 is a coherence criterion that looks only at internal properties of the data without incorporating an external standard. In Experiment 1, college students (n = 20 carried out 2- and 3-digit addition and multiplication problems under time pressure. In Experiment 2, experienced golfers (n = 12, also college students, putted toward a target from nine different locations. Within each experiment, we analyzed the same responses using different methods. For the arithmetic tasks, accuracy information (mean absolute deviation from the correct answer, MAD using a coherence criterion was available; for golf, accuracy information using a correspondence criterion (mean deviation from the target, also MAD was available. We ranked the performances of the participants according to each measure, then compared the orders using Spearman's rextsubscript{s}. For mental calculation, the CWS order correlated moderately (rextsubscript{s} =.46 with that of MAD. However, a different coherence criterion, degree of model fit, did not correlate with either CWS or accuracy. For putting, the ranking generated by CWS correlated .68 with that generated by MAD. Consensual answers were also available for both experiments, and the rankings they generated correlated highly with those of MAD. The coherence vs. correspondence distinction did not map well onto criteria for performance evaluation.

  18. Amplicon-based semiconductor sequencing of human exomes: performance evaluation and optimization strategies.

    Science.gov (United States)

    Damiati, E; Borsani, G; Giacopuzzi, Edoardo

    2016-05-01

    The Ion Proton platform allows to perform whole exome sequencing (WES) at low cost, providing rapid turnaround time and great flexibility. Products for WES on Ion Proton system include the AmpliSeq Exome kit and the recently introduced HiQ sequencing chemistry. Here, we used gold standard variants from GIAB consortium to assess the performances in variants identification, characterize the erroneous calls and develop a filtering strategy to reduce false positives. The AmpliSeq Exome kit captures a large fraction of bases (>94 %) in human CDS, ClinVar genes and ACMG genes, but with 2,041 (7 %), 449 (13 %) and 11 (19 %) genes not fully represented, respectively. Overall, 515 protein coding genes contain hard-to-sequence regions, including 90 genes from ClinVar. Performance in variants detection was maximum at mean coverage >120×, while at 90× and 70× we measured a loss of variants of 3.2 and 4.5 %, respectively. WES using HiQ chemistry showed ~71/97.5 % sensitivity, ~37/2 % FDR and ~0.66/0.98 F1 score for indels and SNPs, respectively. The proposed low, medium or high-stringency filters reduced the amount of false positives by 10.2, 21.2 and 40.4 % for indels and 21.2, 41.9 and 68.2 % for SNP, respectively. Amplicon-based WES on Ion Proton platform using HiQ chemistry emerged as a competitive approach, with improved accuracy in variants identification. False-positive variants remain an issue for the Ion Torrent technology, but our filtering strategy can be applied to reduce erroneous variants.

  19. Evaluating performance of simplified physically based models for shallow landslide susceptibility

    Science.gov (United States)

    Formetta, Giuseppe; Capparelli, Giovanna; Versace, Pasquale

    2016-11-01

    Rainfall-induced shallow landslides can lead to loss of life and significant damage to private and public properties, transportation systems, etc. Predicting locations that might be susceptible to shallow landslides is a complex task and involves many disciplines: hydrology, geotechnical science, geology, hydrogeology, geomorphology, and statistics. Two main approaches are commonly used: statistical or physically based models. Reliable model applications involve automatic parameter calibration, objective quantification of the quality of susceptibility maps, and model sensitivity analyses. This paper presents a methodology to systemically and objectively calibrate, verify, and compare different models and model performance indicators in order to identify and select the models whose behavior is the most reliable for particular case studies.The procedure was implemented in a package of models for landslide susceptibility analysis and integrated in the NewAge-JGrass hydrological model. The package includes three simplified physically based models for landslide susceptibility analysis (M1, M2, and M3) and a component for model verification. It computes eight goodness-of-fit indices by comparing pixel-by-pixel model results and measurement data. The integration of the package in NewAge-JGrass uses other components, such as geographic information system tools, to manage input-output processes, and automatic calibration algorithms to estimate model parameters. The system was applied for a case study in Calabria (Italy) along the Salerno-Reggio Calabria highway, between Cosenza and Altilia. The area is extensively subject to rainfall-induced shallow landslides mainly because of its complex geology and climatology. The analysis was carried out considering all the combinations of the eight optimized indices and the three models. Parameter calibration, verification, and model performance assessment were performed by a comparison with a detailed landslide inventory map for the

  20. Performance Evaluation of a Nanofluid (CuO-H2O Based Low Flux Solar Collector

    Directory of Open Access Journals (Sweden)

    Lal Kundan

    2013-04-01

    Full Text Available As the fossil fuels are depleting continuously, we know that solar energy harvesting is a significant potential area for new research dimensions. Sun provides us about 1.9 x 108TWh/yr on the land, of which 1.3 x 105 TWh]/yr energy is used. In order to make much use of solar energy on the earth, solar energy harvesting into more usable form (e.g. heat or electricity by using solar energy collectors is important aspect. A solar collector [1] is a device which transfers the collected solar energy to a fluid passing in contact with it. The performance of collector does not only depends upon how effective the absorber is, but also on how effective are the heat transfer and thermal properties (e.g. thermal conductivity, heat capacity of the fluid which is being used. The absorption properties of the fluids generally used in solar collectors are very poor which in turn limits the efficiency of the solar collector. So, there is a need to use energy efficient heat transfer fluids for high efficiency and performance. A relatively new attempt has been made to increase the performance of the solar collector by using nanofluids. Recently developed a new class of working fluids called Nanofluids, found to be possessing better thermal properties over the hosting fluids, can be a good option in the solar collector [5]. In our research work the CuO-water based nanofluid has been tested in the solar collector and their performance is investigated. It has been found that efficiency if the solar collector is increased by 4-6% compared to water

  1. Evaluative stimulus (in)congruency impacts performance in an unrelated task: evidence for a resource-based account of evaluative priming.

    Science.gov (United States)

    Gast, Anne; Werner, Benedikt; Heitmann, Christina; Spruyt, Adriaan; Rothermund, Klaus

    2014-01-01

    In two experiments, we assessed evaluative priming effects in a task that was unrelated to the congruent or incongruent stimulus pairs. In each trial, participants saw two valent (positive or negative) pictures that formed evaluatively congruent or incongruent stimulus pairs and a letter that was superimposed on the second picture. Different from typical evaluative priming studies, participants were not required to respond to the second of the valent stimuli, but asked to categorize the letter that was superimposed on the second picture. We assessed the impact of the evaluative (in)congruency of the two pictures on the performance in responding to the letter. In addition, we manipulated attention to the evaluative dimension by asking participants in one experimental group to respond to the valence of the pictures on a subset of trials (evaluative task condition). In both experiments, we found evaluative priming effects in letter categorization responses: Participants categorized the letter faster (and sometimes more correctly) in trials with congruent picture-pairs. These effects were present only in the evaluative task condition. These findings can be explained with different resource-based accounts of evaluative priming and the additional assumption that attention to valence is necessary for evaluative congruency to affect processing resources. According to resource-based accounts valence-incongruent trials require more cognitive resources than valence-congruent trials (e.g., Hermans, Van den Broeck, & Eelen, 1998).

  2. Airports’ Operational Performance and Efficiency Evaluation Based on Multicriteria Decision Analysis (MCDA and Data Envelopment Analysis (DEA Tools

    Directory of Open Access Journals (Sweden)

    João Jardim

    2015-12-01

    Full Text Available Airport benchmarking depends on airports’ operational performance and efficiency indicators, which are important for business agents, operational managers, regulatory agencies, airlines and passengers. There are several sets of single and complex indicators to evaluate airports’ performance and efficiency as well as several techniques to benchmark such infrastructures. The general aim of this work is twofold: to balance the data envelopment analysis (DEA and multicriteria decision analysis (MCDA tools and to show that airport benchmarking is also possible using a multicriteria decision analysis tool called Measuring Attractiveness by a Categorical Based Evaluation Technique (MACBETH. Whilst DEA measures the relative performance in the presence of multiple inputs and outputs, MCDA/ MACBETH uses performance and efficiency indicators to support benchmark results, being useful for evaluating the real importance and weight of the selected indicators. The work is structured as follows: first, a state-of-the-art review concerning either airport benchmarking and performance indicators or DEA and MCDA tool techniques; second, an overview of the impacts on airports’ operational performance and efficiency of emergent operational factors (sudden meteorological/natural phenomena; third, two case studies on a set of worldwide airports and Madeira (FNC Airport; and fourth, some insights into and challenges for future research that are still under development.

  3. Performance Evaluation of Public Key Based Authentication in Future Mobile Communication Systems

    Directory of Open Access Journals (Sweden)

    Kambourakis Georgios

    2004-01-01

    Full Text Available While mobile hosts are evolving into full-IP enabled devices, there is a greater demand to provide a more flexible, reconfigurable, and scalable security mechanism in mobile communication systems beyond 3G (B3G. Work has already begun on such an “all-IP” end-to-end solution, commonly referred to as 4G systems. Fully fledged integration between heterogeneous networks, such as 2.5G, UMTS, WLAN, Bluetooth, and the Internet, demands fully compatible, time-tested, and reliable mechanisms to depend on. SSL protocol has proved its effectiveness in the wired Internet and it will probably be the most promising candidate for future wireless environments. In this paper, we discuss existing problems related to authentication and key agreement (AKA procedures, such as compromised authentication vectors attacks, as they appear in current 2/2.5G/3G mobile communication systems, and propose how SSL, combined with public key infrastructure (PKI elements, can be used to overcome these vulnerabilities. In this B3G environment, we perceive authentication as a service, which has to be performed at the higher protocol layers irrespective of the underlying network technology. Furthermore, we analyze the effectiveness of such a solution, based on measurements of a “prototype” implementation. Performance measurements indicate that SSL-based authentication can be possible in terms of service time in future wireless systems, while it can simultaneously provide both the necessary flexibility to network operators and a high level of confidence to end users.

  4. Cryptanalysis and Performance Evaluation of Enhanced Threshold Proxy Signature Scheme Based on RSA for Known Signers

    Directory of Open Access Journals (Sweden)

    Raman Kumar

    2013-01-01

    Full Text Available In these days there are plenty of signature schemes such as the threshold proxy signature scheme (Kumar and Verma 2010. The network is a shared medium so that the weakness security attacks such as eavesdropping, replay attack, and modification attack. Thus, we have to establish a common key for encrypting/decrypting our communications over an insecure network. In this scheme, a threshold proxy signature scheme based on RSA, any or more proxy signers can cooperatively generate a proxy signature while or fewer of them cannot do it. The threshold proxy signature scheme uses the RSA cryptosystem to generate the private and the public key of the signers (Rivest et al., 1978. Comparison is done on the basis of time complexity, space complexity, and communication overhead. We compare the performance of four schemes (Hwang et al. (2003, Kuo and Chen (2005, Yong-Jun et al. (2007, and Li et al. (2007, with the performance of a scheme that has been proposed earlier by the authors of this paper. In the proposed scheme, both the combiner and the secret share holder can verify the correctness of the information that they are receiving from each other. Therefore, the enhanced threshold proxy signature scheme is secure and efficient against notorious conspiracy attacks.

  5. Performance Evaluation of SARDA: An Individual Aircraft-Based Advisory Concept for Surface Management

    Science.gov (United States)

    Jung, Yoon; Malik, Waqar; Tobias, Leonard; Gupta, Gautam; Hoang, Ty; Hayashi, Miwa

    2015-01-01

    Surface operations at airports in the US are based on tactical operations, where departure aircraft primarily queue up and wait at the departure runways. NASAs Spot And Runway Departure Advisor (SARDA) tool was developed to address these inefficiencies through Air Traffic Control Tower advisories. The SARDA system is being updated to include collaborative gate hold, either tactically or strategically. This paper presents the results of the human-in-the-loop evaluation of the tactical gate hold version of SARDA in a 360 degree simulated tower setting. The simulations were conducted for the east side of the Dallas-Fort Worth airport. The new system provides gate hold, ground controller and local controller advisories based on a single scheduler. Simulations were conducted with SARDA on and off, the off case reflecting current day operations with no gate hold. Scenarios based on medium (1.2x current levels) and heavy (1.5x current levels) traffic were explored. Data collected from the simulation was analyzed for runway usage, delay for departures and arrivals, and fuel consumption. Further, Traffic Management Initiatives were introduced for a subset of the aircraft. Results indicated that runway usage did not change with the use of SARDA, i.e., there was no loss in runway throughput as compared to baseline. Taxiing delay was significantly reduced with the use of advisory by 45 in medium scenarios and 60 in heavy. Arrival delay was unaffected by the use of advisory. Total fuel consumption was also reduced by 23 in medium traffic and 33 in heavy. TMI compliance appeared unaffected by the advisory.

  6. Performance Evaluation of Individual Aircraft Based Advisory Concept for Surface Management

    Science.gov (United States)

    Gupta, Gautam; Malik, Waqar; Tobias, Leonard; Jung, Yoon; Hong, Ty; Hayashi, Miwa

    2013-01-01

    Surface operations at airports in the US are based on tactical operations, where departure aircraft primarily queue up and wait at the departure runways. NASA's Spot And Runway Departure Advisor (SARDA) tool was developed to address these inefficiencies through Air Traffic Control Tower advisories. The SARDA system is being updated to include collaborative gate hold, either tactically or strategically. This paper presents the results of the human-in-the-loop evaluation of the tactical gate hold version of SARDA in a 360 degree simulated tower setting. The simulations were conducted for the east side of the Dallas/Fort Worth airport. The new system provides gate hold, ground controller and local controller advisories based on a single scheduler. Simulations were conducted with SARDA on and off, the off case reflecting current day operations with no gate hold. Scenarios based on medium (1.2x current levels) and heavy (1.5x current levels) traffic were explored. Data collected from the simulation was analyzed for runway usage, delay for departures and arrivals, and fuel consumption. Further, Traffic Management Initiatives were introduced for a subset of the aircraft. Results indicated that runway usage did not change with the use of SARDA, i.e., there was no loss in runway throughput as compared to baseline. Taxiing delay was significantly reduced with the use of advisory by 45% in medium scenarios and 60% in heavy. Arrival delay was unaffected by the use of advisory. Total fuel consumption was also reduced by 23% in medium traffic and 33% in heavy. TMI compliance appeared unaffected by the advisory

  7. Performance Evaluations for IEEE 802.15.4-based IoT Smart Home Solution

    Directory of Open Access Journals (Sweden)

    Nga Dinh

    2016-09-01

    Full Text Available The Internet of Things (IoT is going to be a market-changing force for a variety of real-time applications such as e-healthcare, home automation, environmental monitoring, and industrial automation. Low power wireless communication protocols offering long lifetime and high reliability such as the IEEE 802.15.4 standard have been a key enabling technology for IoT deployments and are deployed for home automation recently. The issues of the IEEE 802.15.4 networks have moved from theory to real world deployments. The work presented herein intends to demonstrate the use of the IEEE 802.15.4 standard in recent IoT commercial products for smart home applications: the Smart Home Starter Kit. The contributions of the paper are twofold. First, the paper presents how the IEEE 802.15.4 standard is employed in Smart Home Starter Kit. In particular, network topology, network operations, and data transfer mode are investigated. Second, network performance metrics such as end-to-end (E2E delay and frame reception ratio (FRR are evaluated by experiments. In addition, the paper discusses several directions for future improvements of home automation commercial products.

  8. Performance evaluation of Biograph PET/CT system based on Monte Carlo simulation

    Science.gov (United States)

    Wang, Bing; Gao, Fei; Liu, Hua-Feng

    2010-10-01

    Combined lutetium oxyorthosilicate (LSO) Biograph PET/CT is developed by Siemens Company and has been introduced into medical practice. There is no septa between the scintillator rings, the acquisition mode is full 3D mode. The PET components incorporate three rings of 48 detector blocks which comprises a 13×13 matrix of 4×4×20mm3 elements. The patient aperture is 70cm, the transversal field of view (FOV) is 58.5cm, and the axial field of view is 16.2cm. The CT components adopt 16 slices spiral CT scanner. The physical performance of this PET/CT scanner has been evaluated using Monte Carlo simulation method according to latest NEMA NU 2-2007 standard and the results have been compared with real experiment results. For PET part, in the center FOV the average transversal resolution is 3.67mm, the average axial resolution is 3.94mm, and the 3D-reconstructed scatter fraction is 31.7%. The sensitivities of the PET scanner are 4.21kcps/MBq and 4.26kcps/MBq at 0cm and 10cm off the center of the transversal FOV. The peak NEC is 95.6kcps at a concentration of 39.2kBq/ml. The spatial resolution of CT part is up to 1.12mm at 10mm off the center. The errors between simulated and real results are permitted.

  9. Glycerol-based sterilization bioindicator system from Bacillus atrophaeus: development, performance evaluation, and cost analysis.

    Science.gov (United States)

    Sella, Sandra R B R; Gouvea, Patricia Milla; Gomes, Vanessa F; Vandenberghe, Luciana P S; Minozzo, João Carlos; Soccol, Carlos Ricardo

    2013-02-01

    The development of new value-added applications for glycerol is of worldwide interest because of the environmental and economic problems that may be caused by an excess of glycerol generated from biodiesel production. A novel use of glycerol as a major substrate for production of a low-cost sterilization biological indicator system (BIS; spores on a carrier plus a recovery medium) was investigated. A sequential experimental design strategy was applied for product development and optimization. The proposed recovery medium enables germination and outgrowth of heat-damaged spores, promoting a D (160 °C) value of 6.6 ± 0.1 min. Bacillus atrophaeus spores production by solid-state fermentation reached a 2.3 ± 1.2 × 10(8) CFU/g dry matter. Sporulation kinetics results allowed this process to be restricted in 48 h. Germination kinetics demonstrated the visual identification of nonsterile BIS within 24 h. Performance evaluation of the proposed BIS against dry-heat and ethylene oxide sterilization showed compliance with the regulatory requirements. Cost breakdowns were from 41.8 (quality control) up to 72.8 % (feedstock). This is the first report on sterilization BIS production that uses glycerol as a sole carbon source, with significant cost reduction and the profitable use of a biodiesel byproduct.

  10. Feasibility and performance evaluation of generating and recording visual evoked potentials using ambulatory Bluetooth based system.

    Science.gov (United States)

    Ellingson, Roger M; Oken, Barry

    2010-01-01

    Report contains the design overview and key performance measurements demonstrating the feasibility of generating and recording ambulatory visual stimulus evoked potentials using the previously reported custom Complementary and Alternative Medicine physiologic data collection and monitoring system, CAMAS. The methods used to generate visual stimuli on a PDA device and the design of an optical coupling device to convert the display to an electrical waveform which is recorded by the CAMAS base unit are presented. The optical sensor signal, synchronized to the visual stimulus emulates the brain's synchronized EEG signal input to CAMAS normally reviewed for the evoked potential response. Most importantly, the PDA also sends a marker message over the wireless Bluetooth connection to the CAMAS base unit synchronized to the visual stimulus which is the critical averaging reference component to obtain VEP results. Results show the variance in the latency of the wireless marker messaging link is consistent enough to support the generation and recording of visual evoked potentials. The averaged sensor waveforms at multiple CPU speeds are presented and demonstrate suitability of the Bluetooth interface for portable ambulatory visual evoked potential implementation on our CAMAS platform.

  11. Development of Innovative Aerogel Based Plasters: Preliminary Thermal and Acoustic Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Cinzia Buratti

    2014-09-01

    Full Text Available The thermal and acoustic properties of innovative insulating systems used as building coatings were investigated: Granular silica aerogel was mixed with natural plaster in different percentages. This coating solution is transpiring and insulating, thanks to the use of a natural lime coat and aerogel, a highly porous light material with very low thermal conductivity. The thermal conductivity of the proposed solution was evaluated by means of a Heat Flow meter apparatus (EN ISO 12667, considering different percentages of aerogel. The natural plaster without aerogel has a thermal conductivity of about 0.50 W/m K; considering a percentage of granular aerogel of about 90% in volume, the thermal conductivity of the insulating natural coating falls to 0.050 W/m K. Increasing the percentage of granular aerogel, a value of about 0.018–0.020 W/m K can be reached. The acoustic properties were also evaluated in terms of the acoustic absorption coefficient, measured by means of a Kundt’s Tube (ISO 10534-2. Two samples composed by a plasterboard support, an insulation plaster with aerogel (thicknesses 10 mm and 30 mm respectively and a final coat were assembled. The results showed that the absorption coefficient strongly depends on the final coat, so the aerogel-based plaster layer moderately influences the final value. The application of this innovative solution can be a useful tool for new buildings, but also for the refurbishment of existing ones. This material is in development: until now, the best value of the thermal conductivity obtained from manufacturers is about 0.015 W/m K.

  12. Financial access to health care in Karuzi, Burundi: a household-survey based performance evaluation

    Directory of Open Access Journals (Sweden)

    Van Herp Michel

    2009-10-01

    Full Text Available Abstract Background In 2003, Médecins Sans Frontières, the provincial government, and the provincial health authority began a community project to guarantee financial access to primary health care in Karuzi province, Burundi. The project used a community-based assessment to provide exemption cards for indigent households and a reduced flat fee for consultations for all other households. Methods An evaluation was carried out in 2005 to assess the impact of this project. Primary data collection was through a cross-sectional household survey of the catchment areas of 10 public health centres. A questionnaire was used to determine the accuracy of the community-identification method, households' access to health care, and costs of care. Household socioeconomic status was determined by reported expenditures and access to land. Results Financial access to care at the nearest health centre was ensured for 70% of the population. Of the remaining 30%, half experienced financial barriers to access and the other half chose alternative sites of care. The community-based assessment increased the number of people of the population who qualified for fee exemptions to 8.6% but many people who met the indigent criteria did not receive a card. Eighty-eight percent of the population lived under the poverty threshold. Referring to the last sickness episode, 87% of households reported having no money available and 25% risked further impoverishment because of healthcare costs even with the financial support system in place. Conclusion The flat fee policy was found to reduce cost barriers for some households but, given the generalized poverty in the area, the fee still posed a significant financial burden. This report showed the limits of a programme of fee exemption for indigent households and a flat fee for others in a context of widespread poverty.

  13. Dosimetric performance evaluation regarding proton beam incident angles of a lithium-based AB-BNCT design.

    Science.gov (United States)

    Lee, Pei-Yi; Liu, Yuan-Hao; Jiang, Shiang-Huei

    2014-10-01

    The (7)Li(p,xn)(7)Be nuclear reaction, based on the low-energy protons, could produce soft neutrons for accelerator-based boron neutron capture therapy (AB-BNCT). Based on the fact that the induced neutron field is relatively divergent, the relationship between the incident angle of proton beam and the neutron beam quality was evaluated in this study. To provide an intense epithermal neutron beam, a beam-shaping assembly (BSA) was designed. And a modified Snyder head phantom was used in the calculations for evaluating the dosimetric performance. From the calculated results, the intensity of epithermal neutrons increased with the increase in proton incident angle. Hence, either the irradiation time or the required proton current can be reduced. When the incident angle of 2.5-MeV proton beam is 120°, the required proton current is ∼13.3 mA for an irradiation time of half an hour.

  14. Design and Performance Evaluation of Optical Ethernet Switching Architecture with Liquid Crystal on Silicon-Based Beam-Steering Technology

    Science.gov (United States)

    Cheng, Yuh-Jiuh; Chou, H.-H.; Shiau, Yhi; Cheng, Shu-Ying

    2016-07-01

    A non-blocking optical Ethernet switching architecture with liquid crystal on a silicon-based beam-steering switch and optical output buffer strategies are proposed. For preserving service packet sequencing and fairness of routing sequence, priority and round-robin algorithms are adopted at the optical output buffer in this research. Four methods were used to implement tunable fiber delay modules for the optical output buffers to handle Ethernet packets with variable bit-rates. The results reported are based on the simulations performed to evaluate the proposed switching architecture with traffic analysis under a traffic model captured from a real-core network.

  15. More Bias in Performance Evaluation?

    Science.gov (United States)

    Gallagher, Michael C.

    1978-01-01

    The results of this study indicate that a single performance evaluation should not be used for different purposes since the stated purpose of the evaluation can affect the actual performance rating. (Author/IRT)

  16. Zambia - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium Challenge Corporation — The MCC commissioned this ex post evaluation to provide an objective and rigorous assessment of the effectiveness and efficacy of ZTP activities. The evaluation team...

  17. Performance Evaluations in Audit Firms

    DEFF Research Database (Denmark)

    Riise Johansen, Thomas; Christoffersen, Jeppe

    2017-01-01

    Previous research has only minimally examined the association between the behaviour and performance evaluations of individual auditors beyond the use of efficiency-focused evaluations. We examine the association between dysfunctional auditor behaviour and three evaluation foci: an efficiency focu...

  18. Tanzania - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium Challenge Corporation — The methodologies employed by the evaluation are both quantitative and qualitative. Wherever possible, we obtain data and employ an identification strategy with...

  19. Algorithm performance evaluation

    Science.gov (United States)

    Smith, Richard N.; Greci, Anthony M.; Bradley, Philip A.

    1995-03-01

    Traditionally, the performance of adaptive antenna systems is measured using automated antenna array pattern measuring equipment. This measurement equipment produces a plot of the receive gain of the antenna array as a function of angle. However, communications system users more readily accept and understand bit error rate (BER) as a performance measure. The work reported on here was conducted to characterize adaptive antenna receiver performance in terms of overall communications system performance using BER as a performance measure. The adaptive antenna system selected for this work featured a linear array, least mean square (LMS) adaptive algorithm and a high speed phase shift keyed (PSK) communications modem.

  20. Performance Evaluation of Sugarcane Bagasse Ash-Based Cement for Durable Concrete

    OpenAIRE

    Bahurudeen, A.; Santhanam, Manu

    2014-01-01

    Sugarcane bagasse ash (SCBA) is obtained as a by-product from cogeneration combustion boilers in sugar industries. Bagasse ash is mainly composed of reactive silica and can be used as pozzolanic material in concrete. Previous studies have reported that the utilization of SCBA as pozzolanic material in concrete can significantly improve its performance. A comprehensive investigation of durability performance of bagasse ash in concrete is not available in existing literature. In all previous st...

  1. Experimental evaluation of high performance base course and road base asphalt concrete with electric arc furnace steel slags.

    Science.gov (United States)

    Pasetto, Marco; Baldo, Nicola

    2010-09-15

    The paper presents the results of a laboratory study aimed at verifying the use of two types of electric arc furnace (EAF) steel slags as substitutes for natural aggregates, in the composition of base course and road base asphalt concrete (BBAC) for flexible pavements. The trial was composed of a preliminary study of the chemical, physical, mechanical and leaching properties of the EAF steel slags, followed by the mix design and performance characterization of the bituminous mixes, through gyratory compaction tests, permanent deformation tests, stiffness modulus tests at various temperatures, fatigue tests and indirect tensile strength tests. All the mixtures with EAF slags presented better mechanical characteristics than those of the corresponding asphalts with natural aggregate and satisfied the requisites for acceptance in the Italian road sector technical standards, thus resulting as suitable for use in road construction.

  2. Experimental performance evaluation of software defined networking (SDN) based data communication networks for large scale flexi-grid optical networks.

    Science.gov (United States)

    Zhao, Yongli; He, Ruiying; Chen, Haoran; Zhang, Jie; Ji, Yuefeng; Zheng, Haomian; Lin, Yi; Wang, Xinbo

    2014-04-21

    Software defined networking (SDN) has become the focus in the current information and communication technology area because of its flexibility and programmability. It has been introduced into various network scenarios, such as datacenter networks, carrier networks, and wireless networks. Optical transport network is also regarded as an important application scenario for SDN, which is adopted as the enabling technology of data communication networks (DCN) instead of general multi-protocol label switching (GMPLS). However, the practical performance of SDN based DCN for large scale optical networks, which is very important for the technology selection in the future optical network deployment, has not been evaluated up to now. In this paper we have built a large scale flexi-grid optical network testbed with 1000 virtual optical transport nodes to evaluate the performance of SDN based DCN, including network scalability, DCN bandwidth limitation, and restoration time. A series of network performance parameters including blocking probability, bandwidth utilization, average lightpath provisioning time, and failure restoration time have been demonstrated under various network environments, such as with different traffic loads and different DCN bandwidths. The demonstration in this work can be taken as a proof for the future network deployment.

  3. Unmanned Aerial ad Hoc Networks: Simulation-Based Evaluation of Entity Mobility Models’ Impact on Routing Performance

    Directory of Open Access Journals (Sweden)

    Jean-Daniel Medjo Me Biomo

    2015-06-01

    Full Text Available An unmanned aerial ad hoc network (UAANET is a special type of mobile ad hoc network (MANET. For these networks, researchers rely mostly on simulations to evaluate their proposed networking protocols. Hence, it is of great importance that the simulation environment of a UAANET replicates as much as possible the reality of UAVs. One major component of that environment is the movement pattern of the UAVs. This means that the mobility model used in simulations has to be thoroughly understood in terms of its impact on the performance of the network. In this paper, we investigate how mobility models affect the performance of UAANET in simulations in order to come up with conclusions/recommendations that provide a benchmark for future UAANET simulations. To that end, we first propose a few metrics to evaluate the mobility models. Then, we present five random entity mobility models that allow nodes to move almost freely and independently from one another and evaluate four carefully-chosen MANET/UAANET routing protocols: ad hoc on-demand distance vector (AODV, optimized link state routing (OLSR, reactive-geographic hybrid routing (RGR and geographic routing protocol (GRP. In addition, flooding is also evaluated. The results show a wide variation of the protocol performance over different mobility models. These performance differences can be explained by the mobility model characteristics, and we discuss these effects. The results of our analysis show that: (i the enhanced Gauss–Markov (EGM mobility model is best suited for UAANET; (ii OLSR, a table-driven proactive routing protocol, and GRP, a position-based geographic protocol, are the protocols most sensitive to the change of mobility models; (iii RGR, a reactive-geographic hybrid routing protocol, is best suited for UAANET.

  4. Performance Evaluation of Electronic Inductor-Based Adjustable Speed Drives with Respect to Line Current Interharmonics

    DEFF Research Database (Denmark)

    Soltani, Hamid; Davari, Pooya; Zare, Firuz;

    2017-01-01

    Electronic Inductor (EI)-based front-end rectifiers have a large potential to become the prominent next generation of Active Front End (AFE) topology used in many applications including Adjustable Speed Drives (ASDs) for systems having unidirectional power flow. The EI-based ASD is mostly attract...

  5. Performance Evaluation of Joint Path and Spectrum Diversity Based Routing Protocol in Cognitive Radio Ad Hoc Networks under Critical Conditions

    Directory of Open Access Journals (Sweden)

    Zamree Che-Aron

    2015-06-01

    Full Text Available Cognitive Radio (CR technology has been introduced to solve the problems of spectrum underutilization and spectrum scarcity caused by improper spectrum management policies. The main concept of Cognitive Radio Ad Hoc Network (CRAHN is that, in a wireless ad hoc network, the unlicensed users (or Secondary Users (SUs are allowed to access the temporally unused licensed spectrum bands for data communications without harmful interference to the licensed users (or Primary Users (PUs. In CRAHNs, the mobile SUs communicate with each other without the use of any centralized network infrastructure. Routing in CRAHNs is an important task and faces various challenges including PU interference, frequent network topology changes, energy constraint, volatile bandwidth and fragile connectivity. In this study, an attempt is made to evaluate the performance of the Dual Diversity Cognitive Ad-hoc Routing Protocol (D2CARP in CRAHNs under critical conditions, i.e., high node mobility rate and number of PUs. The D2CARP protocol is a joint path and spectrum diversity based routing protocol for CRAHNs. The performance evaluation is conducted through simulation using NS-2 simulator. The performance metrics to be considered include average throughput, percentage of packet loss, average end-to-end delay and average jitter. The simulation results prove that the protocol performance is significantly affected in the networks with high number of PUs and mobility rate, leading to high path failure rate and severe service outages.

  6. Performance evaluation of ICN/CCN based service migration approach in virtualized LTE systems

    NARCIS (Netherlands)

    Satria, Triadimas; Karimzadeh, Morteza; Karagiannis, Georgios

    2014-01-01

    The continuous growth in using mobile devices (e.g. smart phones, tablets, etc.) has increased the complexity in provisioning cellular network resources. Applying the cloud computing model in LTE (Long Term Evolution) systems could be a good solution to increase LTE’s performance by building a share

  7. An Empirical Analysis of Performance Evaluation of University Teachers Based on KPI

    Directory of Open Access Journals (Sweden)

    Zhu Chuanshu

    2015-01-01

    Full Text Available Except for the influential graduates, the content of the development core of universities needs to improve the scientific allocation of teacher resources, and the most relevant content to human resource of teacher is the salary incentive system. While the system related to performance appraisal system is the perfor-mance assessment system, so the sound and perfect performance appraisal system of teachers in Colleges and universities is conducive to the strategic development of university. This article uses KPI theory in index design for quality content of university teachers, aiming at abstracting the key quality therefrom, constructing KPI performance appraisal system complying to 80/20 and provide theoretical basis for improvement of human resources system in Colleges and promotion of the development of universities. This article provides five key types of quality of college teachers and refinable, quantifiable and behavioral key qualities, and conducts an empirical demonstration of weight of the corresponding index by the questionnaire survey, expert interview and AHP analysis method.

  8. A risk-based approach for evaluation of hygiene performance at pig slaughter

    DEFF Research Database (Denmark)

    Bollerslev, Anne Mette; Nauta, Maarten; Hald, Tine;

    2016-01-01

    In Denmark, the pig slaughterhouses have a daily input of pigs infected and/or contaminated with Salmonella, and the slaughter hygiene has major influence on the level of Salmonella contamination on the meat leaving the slaughterhouse. However, the relationship between the effect of improved...... hygiene performance and the consequential reduction of human health risk has not been estimated so far. In this study, swab samples from 2702 pig carcasses were collected, originally for other purposes, from five large Danish slaughterhouses in a period from 2005 to 2007, covering all seasons of the year...... and Salmonella was used as basis for developing a quantitative risk assessment model for Salmonella, using the level E. coli as model input. The model output associated the hygiene performance with a relative risk estimate of human salmonellosis. The overall objective was to develop a decision support tool...

  9. EVALUATION OF PERFORMANCE OF HORIZONTAL AXIS WIND TURBINE BLADES BASED ON OPTIMAL ROTOR THEORY

    Directory of Open Access Journals (Sweden)

    Nitin Tenguria

    2011-01-01

    Full Text Available Wind energy is a very popular renewable energy resource. In order to increase the use of wind energy, it is important to develop wind turbine rotor with high rotations rates and power coefficient. In this paper, a method for the determination of the aerodynamic performance characteristics using NACA airfoils is given for three bladed horizontal axis wind turbine. Blade geometry is obtained from the best approximation of the calculated theoretical optimum chord and twist distribution of the rotating blade. Optimal rotor theory is used, which is simple enough and accurate enough for rotor design. In this work, eight different airfoils are used to investigate the changes in performance of the blade. Rotor diameter taken is 82 m which is the diameter of VESTAS V82-1.65MW. The airfoils taken are same from root to tip in every blade. The design lift coefficient taken is 1.1. A computer program is generated to automate the complete procedure.

  10. EVALUATION OF PERFORMANCE OF HORIZONTAL AXIS WIND TURBINE BLADES BASED ON OPTIMAL ROTOR THEORY

    Directory of Open Access Journals (Sweden)

    Nitin Tenguria

    2011-06-01

    Full Text Available Wind energy is a very popular renewable energy resource. In order to increase the use of wind energy, it is important to develop wind turbine rotor with high rotations rates and power coefficient. In this paper, a method for the determination of the aerodynamic performance characteristics using NACA airfoils is given for three bladed horizontal axis wind turbine. Blade geometry is obtained from the best approximation of the calculated theoretical optimum chord and twist distribution of the rotating blade. Optimal rotor theory is used, which is simple enough and accurate enough for rotor design. In this work, eight different airfoils are used to investigate the changes in performance of the blade. Rotor diameter taken is 82 m which is the diameter of VESTAS V82-1.65MW. The airfoils taken are same from root to tip in every blade. The design lift coefficient taken is 1.1. A computer program is generated to automate the complete procedure.

  11. PERFORMANCE EVALUATION OF DIFFERENT GROUND FILTERING ALGORITHMS FOR UAV-BASED POINT CLOUDS

    Directory of Open Access Journals (Sweden)

    C. Serifoglu

    2016-06-01

    Full Text Available Digital Elevation Model (DEM generation is one of the leading application areas in geomatics. Since a DEM represents the bare earth surface, the very first step of generating a DEM is to separate the ground and non-ground points, which is called ground filtering. Once the point cloud is filtered, the ground points are interpolated to generate the DEM. LiDAR (Light Detection and Ranging point clouds have been used in many applications thanks to their success in representing the objects they belong to. Hence, in the literature, various ground filtering algorithms have been reported to filter the LiDAR data. Since the LiDAR data acquisition is still a costly process, using point clouds generated from the UAV images to produce DEMs is a reasonable alternative. In this study, point clouds with three different densities were generated from the aerial photos taken from a UAV (Unmanned Aerial Vehicle to examine the effect of point density on filtering performance. The point clouds were then filtered by means of five different ground filtering algorithms as Progressive Morphological 1D (PM1D, Progressive Morphological 2D (PM2D, Maximum Local Slope (MLS, Elevation Threshold with Expand Window (ETEW and Adaptive TIN (ATIN. The filtering performance of each algorithm was investigated qualitatively and quantitatively. The results indicated that the ATIN and PM2D algorithms showed the best overall ground filtering performances. The MLS and ETEW algorithms were found as the least successful ones. It was concluded that the point clouds generated from the UAVs can be a good alternative for LiDAR data.

  12. A novel hybrid MCDM model for performance evaluation of research and technology organizations based on BSC approach.

    Science.gov (United States)

    Varmazyar, Mohsen; Dehghanbaghi, Maryam; Afkhami, Mehdi

    2016-10-01

    Balanced Scorecard (BSC) is a strategic evaluation tool using both financial and non-financial indicators to determine the business performance of organizations or companies. In this paper, a new integrated approach based on the Balanced Scorecard (BSC) and multi-criteria decision making (MCDM) methods are proposed to evaluate the performance of research centers of research and technology organization (RTO) in Iran. Decision-Making Trial and Evaluation Laboratory (DEMATEL) are employed to reflect the interdependencies among BSC perspectives. Then, Analytic Network Process (ANP) is utilized to weight the indices influencing the considered problem. In the next step, we apply four MCDM methods including Additive Ratio Assessment (ARAS), Complex Proportional Assessment (COPRAS), Multi-Objective Optimization by Ratio Analysis (MOORA), and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) for ranking of alternatives. Finally, the utility interval technique is applied to combine the ranking results of MCDM methods. Weighted utility intervals are computed by constructing a correlation matrix between the ranking methods. A real case is presented to show the efficacy of the proposed approach.

  13. Performance Evaluation and Implementation of FPGA Based SGSF in Smart Diagnostic Applications.

    Science.gov (United States)

    Agarwal, Shivangi; Rani, Asha; Singh, Vijander; Mittal, A P

    2016-03-01

    The main objective of the paper is to implement Savitzky Golay Smoothing Filter (SGSF) so as to apply in pre-processing of real time smart medical diagnostic systems. As very important information of EEG and ECG waveforms lies in the peak of the signal, hence it becomes absolutely necessary to filter noise and artifacts from the signal. The implemented filter should be able to reject the noise efficiently along with the least distortion from the original signal. The shape preserving characteristics of the filter are determined by introducing different noise levels in the signal. The designed filter is tested on synthetic signals of EEG and ECG by adding different types of noise and the performance is analysed on various parameters, i.e., SNR, SSNR, SNRI, MSE, COR and signal distortion of the final output. The smoothing performance comparison of SGSF with the most commonly used Moving Average Filter (MAF) proves that SGSF is more efficient. Hence it is suggested that MAF can be replaced by SGSF. For real time issues, it is further implemented on reconfigurable architectures so as to achieve high speed, low cost, low power consumption and less area. Therefore SGSF is realized on FPGA platform to combine the advantages of both. Real time EEG and ECG signals are also considered for experimentation. The experimental results show that the proposed methodology (FPGA-SGSF) significantly reduces the processing time and preserves the actual features of the signal.

  14. Performance Evaluation of a Nanofluid-Based Direct Absorption Solar Collector with Parabolic Trough Concentrator

    OpenAIRE

    Xu, Guoying; Chen, Wei; Deng, Shiming; Zhang, Xiaosong; Zhao, Sainan

    2015-01-01

    Application of solar collectors for hot water supply, space heating, and cooling plays a significant role in reducing building energy consumption. For conventional solar collectors, solar radiation is absorbed by spectral selective coating on the collectors’ tube/plate wall. The poor durability of the coating can lead to an increased manufacturing cost and unreliability for a solar collector operated at a higher temperature. Therefore, a novel nanofluid-based direct absorption solar collector...

  15. On the Performance Evaluation of Query-Based Wireless Sensor Networks

    Science.gov (United States)

    2012-01-01

    data-centric approaches include flooding and gossiping (see [20]) which are known to be energy- and bandwidth-inefficient. Alternatively, rumor- routing ...network. Wireless sensor networks have been analyzed from a variety of perspectives including design considerations, routing protocols, and resource...sink-based approaches, etc.). The lifetime of WSNs has been further discussed in [7, 28, 29, 38]. Routing protocols constitute the largest area of

  16. Performance evaluation of a LYSO-based PET scanner for monitoring of dose delivery in hadrontherapy

    Science.gov (United States)

    Fabbiani, E.; Belcari, N.; Camarlinghi, N.; Del Guerra, A.; Ferretti, S.; Kraan, A.; Panetta, D.; Sportelli, G.; Rosso, V.

    2015-12-01

    The DoPET scanner is a compact positron emission tomography (PET) device. It has been developed for monitoring the range of charged particles during therapy with hadron beams. Previous works have focused on the development and upgrade of the device and on data analysis. In this paper, a full performance characterization of the DoPET system in terms of the energy resolution, spatial resolution, sensitivity, uniformity, and noise equivalent count rate is reported. All measurements refer to an adapted version of the National Electrical Manufacturers Association (NEMA) NU 4 - 2008 protocol, which was written originally for small animal PET systems. Since DoPET is a dual head planar system, it requires a modified characterisation procedure with respect to those described for ring geometries as in the NEMA NU 4 - 2008 protocol. The presented procedure may be of interest for any other PET system with a similar geometry as DoPET.

  17. PERFORMANCE EVALUATION OF CLUSTERING IN WEB-LOG ANALYSIS BASED ON AGENT

    Directory of Open Access Journals (Sweden)

    Himani

    2012-06-01

    Full Text Available Web mining is the use of data mining Technique toautomatically discover & extract information from webdocuments. When user searches for goods the managementagent receives order from graphical user interface.Management agent receives information, update agentinformation store house and feedback the mining result touser. Intelligent agent can help making computer systemeasier to use, enable finding & filtering information. Themining agent is the analytical center of whole agentsystem.It mainly adopts two kind of analytical method:related rule mining and cluster analysis. Cluster of objectsare formed so that objects with in a cluster have highsimilarity. The aim of this paper is to analyze the web logdata .To achieve this clustering tool is used. It performs intwo phases. First it captures the web-log data. Then itanalyzes the data& discovers the hidden pattern. Agentrequires an agent communication language to describe &process agent request. The future internet will use PERL toencode information with meaningful structure & semantics.

  18. Design and performance evaluation of a state-space based AQM

    CERN Document Server

    Ariba, Yassine; Gouaisbaut, Frédéric; 10.1109/CTRQ.2008.15

    2009-01-01

    Recent research has shown the link between congestion control in communication networks and feedback control system. In this paper, the design of an active queue management (AQM) which can be viewed as a controller, is considered. Based on a state space representation of a linearized fluid flow model of TCP, the AQM design is converted to a state feedback synthesis problem for time delay systems. Finally, an example extracted from the literature and simulations via a network simulator NS (under cross traffic conditions) support our study.

  19. Performance evaluation of a web-based system to exchange Electronic Health Records using Queueing model (M/M/1).

    Science.gov (United States)

    de la Torre, Isabel; Díaz, Francisco Javier; Antón, Míriam; Martínez, Mario; Díez, José Fernando; Boto, Daniel; López, Miguel; Hornero, Roberto; López, María Isabel

    2012-04-01

    Response time measurement of a web-based system is essential to evaluate its performance. This paper shows a comparison of the response times of a Web-based system for Ophthalmologic Electronic Health Records (EHRs), TeleOftalWeb. It makes use of different database models like Oracle 10 g, dbXML 2.0, Xindice 1.2, and eXist 1.1.1. The system's modelling, which uses Tandem Queue networks, will allow us to estimate the service times of the different components of the system (CPU, network and databases). In order to calculate those times, associated to the different databases, benchmarking techniques are used. The final objective of the comparison is to choose the database system resulting in the lowest response time to TeleOftalWeb and to compare the obtained results using a new benchmarking.

  20. Sensor Network-Based Localization for Continuous Tracking Applications: Implementation and Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Franco Davoli

    2008-10-01

    Full Text Available The increasing interest in systems able to provide users with immersive services (e.g., domotics, context-aware applications, and immersive distance learning tools has encouraged the development of cheap and effective platforms aimed at tracking objects and people within a certain space. In this context, wireless sensor networks (WSNs can play a very important role, since specialized sensors can be fruitfully exploited in order to generate/receive signals by means of which the WSN can derive the position of nodes joined to the objects to be tracked. The paper presents an original localization platform that exploits a single-hop WSN, based on a Microchip MCU and a Cypress RF device, to track its moving nodes. Specifically, the nodes of the network are divided into three sets: the first set consists of anchor nodes that, according to the commands from the sink (the central node of the WSN, generate ultrasonic pulses. These pulses are received by the second set of (moving nodes, which estimate the pulse time trip and communicate it to the sink. Finally, the last set is constituted by general purpose nodes that collect any kind of data from the surrounding field. The sink gathers all the data, computes the position of moving nodes, and transfers information to external users on the Internet. The algorithms adopted to manage the network and to localize moving nodes are discussed. A working prototype based upon the hardware platform, software, and protocol described in this paper has been deployed and tested, and some results are shown. Simulation results of the localization system are presented to show system scalability.

  1. Performance Evaluation of ZnO based Rare Earth Element Doped Thin Films

    Directory of Open Access Journals (Sweden)

    Manish Sharma

    2013-10-01

    Full Text Available In DMS materials, a small fraction of a host semiconductor cation is substituted by magnetic ions. We chose as semiconducting host the transparent ZnO, with a bandgap of 3.3 eV at room temperature. Studies on ZnO doped with 3d transition metals indicated only small magnetic moments. The more recent results for Gd in GaN, indicating high magnetic moments, motivated us to investigate ZnO thin films doped with rare earth (RE metal ions. For the 3d transition metals, the 3d electrons are exterior and delocalized; leading to strong direct exchange interactions and high Curie temperatures, but often the orbital momentum is zero, leading to small total magnetic moments per atom. In RE metals, the 4f electrons are localized, exchange interactions are indirect, via 5d or 6s conduction electrons, but the high orbital momentum is leading to high total magnetic moments per atom, like 3.27μB for Nd. The Curie point for Nd is 19 K. In this paper we present the results of our study on ZnO films doped with Nd. Hall measurements are performed to investigate the electrical properties of films. Here we prepared and investigated ZnO films doped with different concentration of Nd. The films are grown on a-plane Al2O3 or SiO2 substrates. Hall investigations of electrical properties revealed the presence of a degenerate, highly conducting, film–substrate interface layer for the films grown on Al2O3; such an effect can be avoided, for example, by using SiO2 substrates. Magnetotransport measurements indicated no anomalous Hall effect, but a pronounced negative magneto resistance ratio that can be interpreted as a paramagnetic response of the system to the applied magnetic field. We would like to proceed with the surface sensitive techniques for investigating magnetic properties of ZnO:RE thin films.

  2. Evaluation of Mo99 and Tc99m Productions Based on a High-Performance Cyclotron

    Directory of Open Access Journals (Sweden)

    J. Esposito

    2013-01-01

    Full Text Available Following preliminary feasibility studies which started at Legnaro National Laboratories (LNL in 2011, the Italian National Institute for Nuclear Physics (INFN research activities are underway aiming at the alternative, accelerator-driven, Mo99/Tc99m production routes. One of the most promising approaches is to use 100Mo-enriched (i.e., >99% molybdenum metallic targets, bombarded with high-beam-current, high-energy proton cyclotrons. In order to get a comprehensive map of radionuclides expected, a detailed theoretical investigation has been carried out using the TALYS-TENDL 2012 excitation functions extended up to (p,6n, (p,p5n, and (p,2p4n levels. A series of quality parameters have thus been calculated both at the end of beam (EOB and at longer times. Results point out that accelerator-99Mo is of limited interest for a possible massive production because of the quite low specific activity with respect to reactor-99Mo. Accelerator-Tc99m quality parameters (i.e., radionuclidic purity (RNP, isotopic purity (IP, and specific activities calculated are instead quite close to the generator-Tc. Calculations at 15, 20, and 25 MeV have thus been performed to assess the best operative irradiation condition for Tc99m production while minimizing both the short-lived and long-lived Tc contaminant radionuclides. Although present in minimum quantities, Tc contaminants may indeed have an impact either on the pharmaceutical labeling procedures or on contributing to patient radiation dose during the diagnostic procedures.

  3. Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash

    Directory of Open Access Journals (Sweden)

    Abideng Hawa

    2013-01-01

    Full Text Available This study reports on the microstructure, compressive strength, and drying shrinkage of metakaolin (MK based geopolymers produced by partially replacing MK by oil palm ash (OPA. The OPA was used as raw material producing different molar ratios of SiO2/Al2O3 and CaO/SiO2. The geopolymer samples were cured at 80°C for 1, 2, or 4 hours and kept at ambient temperature until testing. The compressive strength was measured after 2, 6, and 24 hours and 7 and 28 days. The testing results revealed that the geopolymer with 5% OPA (SiO2 : Al2O3 = 2.88 : 1 gave the highest compressive strength. Scanning electron microscopy (SEM indicated that the 5% OPA sample had a dense-compact matrix and less unreacted raw materials which contributed to the higher compressive strength. In the X-ray diffraction (XRD patterns, the change of the crystalline phase after heat curing for 4 hours was easily detectable compared to the samples subjected to a shorter period of heat curing.

  4. Performance evaluation and microstructure characterization of metakaolin-based geopolymer containing oil palm ash.

    Science.gov (United States)

    Hawa, Abideng; Tonnayopas, Danupon; Prachasaree, Woraphot

    2013-01-01

    This study reports on the microstructure, compressive strength, and drying shrinkage of metakaolin (MK) based geopolymers produced by partially replacing MK by oil palm ash (OPA). The OPA was used as raw material producing different molar ratios of SiO₂/Al₂O₃ and CaO/SiO₂. The geopolymer samples were cured at 80°C for 1, 2, or 4 hours and kept at ambient temperature until testing. The compressive strength was measured after 2, 6, and 24 hours and 7 and 28 days. The testing results revealed that the geopolymer with 5% OPA (SiO₂  : Al₂O₃ = 2.88 : 1) gave the highest compressive strength. Scanning electron microscopy (SEM) indicated that the 5% OPA sample had a dense-compact matrix and less unreacted raw materials which contributed to the higher compressive strength. In the X-ray diffraction (XRD) patterns, the change of the crystalline phase after heat curing for 4 hours was easily detectable compared to the samples subjected to a shorter period of heat curing.

  5. Evaluation of the Performance of Financial Support for Agriculture in Guizhou Province Using Secondary Relative Benefit Model Based on DEA

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    We use the secondary relative benefit model based on DEA to evaluate the performance of agricultural financial expenditure in Guizhou Province, which can give due consideration to the production effectiveness determined by objective natural conditions, and management effectiveness of all regions (as decision-making body) in the use of financial fund for supporting agriculture. In general, there is north-south gradient difference in the performance of financial support for agriculture between regions in Guizhou Province. The drought in 2010 has significant impact on the technical efficiency in the whole province; the performance score of each item in Liupanshui City and Southwest Guizhou is very low; the technical efficiency and management efficiency in most regions need to be improved. In order to improve the performance of financial support for agriculture, we need to ensure the scale of input; at the same time, provide appropriate preferential financial policies for agricultural infrastructure, especially the construction of rural water conservancy, development and promotion of agricultural science and technology, and other fields; adopt the way of special check and acceptance of supporting projects to strengthen the use management of the fund for agriculture.

  6. Performance of human fecal anaerobe-associated PCR-based assays in a multi-laboratory method evaluation study

    Science.gov (United States)

    Layton, Blythe A.; Cao, Yiping; Ebentier, Darcy L.; Hanley, Kaitlyn; Ballesté, Elisenda; Brandão, João; Byappanahalli, Muruleedhara N.; Converse, Reagan; Farnleitner, Andreas H.; Gentry-Shields, Jennifer; Gourmelon, Michèle; Lee, Chang Soo; Lee, Jiyoung; Lozach, Solen; Madi, Tania; Meijer, Wim G.; Noble, Rachel; Peed, Lindsay; Reischer, Georg H.; Rodrigues, Raquel; Rose, Joan B.; Schriewer, Alexander; Sinigalliano, Chris; Srinivasan, Sangeetha; Stewart, Jill; ,; Laurie, C.; Wang, Dan; Whitman, Richard; Wuertz, Stefan; Jay, Jenny; Holden, Patricia A.; Boehm, Alexandria B.; Shanks, Orin; Griffith, John F.

    2013-01-01

    A number of PCR-based methods for detecting human fecal material in environmental waters have been developed over the past decade, but these methods have rarely received independent comparative testing in large multi-laboratory studies. Here, we evaluated ten of these methods (BacH, BacHum-UCD, Bacteroides thetaiotaomicron (BtH), BsteriF1, gyrB, HF183 endpoint, HF183 SYBR, HF183 Taqman®, HumM2, and Methanobrevibacter smithii nifH (Mnif)) using 64 blind samples prepared in one laboratory. The blind samples contained either one or two fecal sources from human, wastewater or non-human sources. The assay results were assessed for presence/absence of the human markers and also quantitatively while varying the following: 1) classification of samples that were detected but not quantifiable (DNQ) as positive or negative; 2) reference fecal sample concentration unit of measure (such as culturable indicator bacteria, wet mass, total DNA, etc); and 3) human fecal source type (stool, sewage or septage). Assay performance using presence/absence metrics was found to depend on the classification of DNQ samples. The assays that performed best quantitatively varied based on the fecal concentration unit of measure and laboratory protocol. All methods were consistently more sensitive to human stools compared to sewage or septage in both the presence/absence and quantitative analysis. Overall, HF183 Taqman® was found to be the most effective marker of human fecal contamination in this California-based study.

  7. SU-D-BRD-01: Cloud-Based Radiation Treatment Planning: Performance Evaluation of Dose Calculation and Plan Optimization

    Energy Technology Data Exchange (ETDEWEB)

    Na, Y; Kapp, D; Kim, Y; Xing, L [Stanford University School of Medicine, Stanford, CA (United States); Suh, T [Catholic UniversityMedical College, Seoul, Seoul (Korea, Republic of)

    2014-06-01

    Purpose: To report the first experience on the development of a cloud-based treatment planning system and investigate the performance improvement of dose calculation and treatment plan optimization of the cloud computing platform. Methods: A cloud computing-based radiation treatment planning system (cc-TPS) was developed for clinical treatment planning. Three de-identified clinical head and neck, lung, and prostate cases were used to evaluate the cloud computing platform. The de-identified clinical data were encrypted with 256-bit Advanced Encryption Standard (AES) algorithm. VMAT and IMRT plans were generated for the three de-identified clinical cases to determine the quality of the treatment plans and computational efficiency. All plans generated from the cc-TPS were compared to those obtained with the PC-based TPS (pc-TPS). The performance evaluation of the cc-TPS was quantified as the speedup factors for Monte Carlo (MC) dose calculations and large-scale plan optimizations, as well as the performance ratios (PRs) of the amount of performance improvement compared to the pc-TPS. Results: Speedup factors were improved up to 14.0-fold dependent on the clinical cases and plan types. The computation times for VMAT and IMRT plans with the cc-TPS were reduced by 91.1% and 89.4%, respectively, on average of the clinical cases compared to those with pc-TPS. The PRs were mostly better for VMAT plans (1.0 ≤ PRs ≤ 10.6 for the head and neck case, 1.2 ≤ PRs ≤ 13.3 for lung case, and 1.0 ≤ PRs ≤ 10.3 for prostate cancer cases) than for IMRT plans. The isodose curves of plans on both cc-TPS and pc-TPS were identical for each of the clinical cases. Conclusion: A cloud-based treatment planning has been setup and our results demonstrate the computation efficiency of treatment planning with the cc-TPS can be dramatically improved while maintaining the same plan quality to that obtained with the pc-TPS. This work was supported in part by the National Cancer Institute (1

  8. Performance Evaluation of Constrained Portfolios

    NARCIS (Netherlands)

    I. Pouchkarev (Igor)

    2005-01-01

    textabstractConventional performance evaluation methods strongly differentiate between the universe which is used for portfolio construction, and the universe which is used for the performance evaluation. Whilst by composing the portfolio we consider the complete opportunity set, in the last case we

  9. Evaluation of a novel chitosan-based flocculant with high flocculation performance, low toxicity and good floc properties.

    Science.gov (United States)

    Yang, Zhen; Li, Haijiang; Yan, Han; Wu, Hu; Yang, Hu; Wu, Qian; Li, Haibo; Li, Aimin; Cheng, Rongshi

    2014-07-15

    In this work, a novel chitosan-based flocculant, carboxymethyl chitosan-graft-poly[(2-methacryloyloxyethyl) trimethyl ammonium chloride] (CMC-g-PDMC), was designed and prepared successfully. Flocculation performance of CMC-g-PDMC was systematically evaluated using kaolin suspension, humic acid (HA) solution and kaolin-HA mixed suspension as synthetic wastewater under acidic, neutral and alkaline conditions, respectively. The experimental results demonstrated that CMC-g-PDMC exhibited lower optimal dosage, higher contaminant removal efficiency, wider applicable pH range, lower effluent toxicity and better floc properties for handling and disposal, in comparison with polyaluminum chloride. The high flocculation performance of CMC-g-PDMC was ascribed to two structural advantages of improved both positive charges and molecular weight. In addition, flocs characteristics including flocs formation, breakage, regrowth and fractal structure, were studied by an in-situ light scattering system during the flocculation process. Detailed analysis clearly illuminated the differences and relationship among floc size, fractal dimension and floc strength. Based on analysis of floc properties in combination with zeta potential measurements, flocculation mechanisms in different synthetic wastewater at various pHs were deeply discussed: charge neutralization or patching played the key role under different conditions, and the relationship between flocculation mechanisms and floc properties has been built. The effective and environment-friendly flocculant bear significant application potentials in water treatment fields.

  10. Performance Evaluation of 5G Millimeter-Wave Cellular Access Networks Using a Capacity-Based Network Deployment Tool

    Directory of Open Access Journals (Sweden)

    Michel Matalatala

    2017-01-01

    Full Text Available The next fifth generation (5G of wireless communication networks comes with a set of new features to satisfy the demand of data-intensive applications: millimeter-wave frequencies, massive antenna arrays, beamforming, dense cells, and so forth. In this paper, we investigate the use of beamforming techniques through various architectures and evaluate the performance of 5G wireless access networks, using a capacity-based network deployment tool. This tool is proposed and applied to a realistic area in Ghent, Belgium, to simulate realistic 5G networks that respond to the instantaneous bit rate required by the active users. The results show that, with beamforming, 5G networks require almost 15% more base stations and 4 times less power to provide more capacity to the users and the same coverage performances, in comparison with the 4G reference network. Moreover, they are 3 times more energy efficient than the 4G network and the hybrid beamforming architecture appears to be a suitable architecture for beamforming to be considered when designing a 5G cellular network.

  11. Dry Process Fuel Performance Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Myung Seung; Song, K. C.; Moon, J. S. and others

    2005-04-15

    The objective of the project is to establish the performance evaluation system of DUPIC fuel during the Phase II R and D. In order to fulfil this objectives, irradiation test of DUPIC fuel was carried out in HANARO using the non-instrumented and SPND-instrumented rig. Also, the analysis on the in-reactor behavior analysis of DUPIC fuel, out-pile test using simulated DUPIC fuel as well as performance and integrity assessment in a commercial reactor were performed during this Phase. The R and D results of the Phase II are summarized as follows : - Performance evaluation of DUPIC fuel via irradiation test in HANARO - Post irradiation examination of irradiated fuel and performance analysis - Development of DUPIC fuel performance code (modified ELESTRES) considering material properties of DUPIC fuel - Irradiation behavior and integrity assessment under the design power envelope of DUPIC fuel - Foundamental technology development of thermal/mechanical performance evaluation using ANSYS (FEM package)

  12. Evaluation of emergency department performance

    DEFF Research Database (Denmark)

    Sørup, Christian Michel; Jacobsen, Peter; Forberg, Jakob Lundager

    2013-01-01

    literature regard as being most relevant in assessing overall ED performance. Methods Following the PRISMA guidelines, a systematic literature review of review articles reporting accentuated ED performance measures was conducted in the databases of PubMed, Cochrane Library, and Web of Science. Study......Background Evaluation of emergency department (ED) performance remains a difficult task due to the lack of consensus on performance measures that reflects high quality, efficiency, and sustainability. Aim To describe, map, and critically evaluate which performance measures that the published...... eligibility criteria includes: 1) the main purpose was to discuss, analyse, or promote performance measures best reflecting ED performance, 2) the article was a review article, and 3) the article reported macro-level performance measures, thus reflecting an overall departmental performance level. Results...

  13. In vitro -in vivo performance evaluation of treated Plantago ovata husk based fast dissolving tablets of glipizide: Flashtab technology

    Directory of Open Access Journals (Sweden)

    Antesh Kumar Jha

    2014-01-01

    Full Text Available Physicians suggest premeal administration of glipizide (30 min before a meal because of longer disintegration time (approximately 15 min of conventional tablet. Hence, the dosage form was developed, called as fast dissolving tablet (FDT, which disintegrates rapidly within a minute. FDTs by Flashtab technology is based on a swellable agent and a superdisintegrant. In the current study, treated Plantago ovata husk (TPOH, and microcrystalline cellulose were utilized as natural superdisintegrant and swellable agent, respectively. FDT formulations were prepared by direct compression and evaluated for in vitro tablet performance, such as disintegration time, wetting time, hardness, friability, swelling and percent drug release. On the basis of finding, formulation with 15% TPOH concentration (TPOH 7 was selected as optimized formulation. To evaluate the in vitro performance, the formulation TPOH 7 and the marketed tablets (glynase were administered to rabbits. In the case of marketed tablet, the peak plasma-concentration of glipizide was obtained in 2.83 h of administration whereas it was 2 h for TPOH 7 indicating immediate absorption and therefore faster onset of action of the prepared FDT formulation than the marketed one. Drug interaction studies, performed by using FTIR spectroscopy, X-ray diffractometry and differential scanning calorimetric methods, indicate that the glipizide is compatible with the formulation components. The accelerated stability study (40°C ± 2°C/75% ±5% relative humidity for the optimized formulation showed a negligible change over time for the in vitro parameters. The results suggest that TPOH has promising potential for faster disintegration and fulfills the requirement of FDTs.

  14. Why performance-based contracting failed in Uganda--an "open-box" evaluation of a complex health system intervention.

    Science.gov (United States)

    Ssengooba, Freddie; McPake, Barbara; Palmer, Natasha

    2012-07-01

    Performance-based contracting (PBC) is a tool that links rewards to attainment of measurable performance targets. Significant problems remain in the methods used to evaluate this tool. The primary focus of evaluations on the effects of PBC (black-box) and less attention to how these effects arise (open-box) generates suboptimal policy learning. A black-box impact evaluation of PBC pilot by the Development Research Group of the World Bank (DRG) and the Ministry of Health (MOH) concluded that PBC was ineffective. This paper reports a theory-based case study intended to clarify how and why PBC failed to achieve its objectives. To explain the observed PBC implementation and responses of participants, this case study employed two related theories i.e. complex adaptive system and expectancy theory respectively. A prospective study trailed the implementation of PBC (2003-2006) while collecting experiences of participants at district and hospital levels. Significant problems were encountered in the implementation of PBC that reflected its inadequate design. As problems were encountered, hasty adaptations resulted in a de facto intervention distinct from the one implied at the design stage. For example, inadequate time was allowed for the selection of service targets by the health centres yet they got 'locked-in' to these poor choices. The learning curve and workload among performance auditors weakened the validity of audit results. Above all, financial shortfalls led to delays, short-cuts and uncertainty about the size and payment of bonuses. The lesson for those intending to implement similar interventions is that PBC should not be attempted 'on the cheap'. It requires a plan to boost local institutional and technical capacities of implementers. It also requires careful consideration of the responses of multiple actors - both insiders and outsiders to the intended change process. Given the costs and complexity of PBC implementation, strengthening conventional approaches

  15. Performance Evaluation of Alternative Relative Orientation Procedures for UAV-based Imagery with Prior Flight Trajectory Information

    Science.gov (United States)

    He, F.; Habib, A.

    2016-06-01

    Thanks to recent advances at the hardware (e.g., emergence of reliable platforms at low cost) and software (e.g., automated identification of conjugate points in overlapping images) levels, UAV-based 3D reconstruction has been widely used in various applications. However, mitigating the impact of outliers in automatically matched points in UAV imagery, especially when dealing with scenes that has poor and/or repetitive texture, remains to be a challenging task. In spite of the fact that existing literature has already demonstrated that incorporating prior motion information can play an important role in increasing the reliability of the matching process, there is a lack of methodologies that are mainly suited for UAV imagery. Assuming the availability of prior information regarding the trajectory of a UAV-platform, this paper presents a two-point approach for reliable estimation of Relative Orientation Parameters (ROPs) of UAV-based images. This approach is based on the assumption that the UAV platform is moving at a constant flying height while maintaining the camera in a nadir-looking orientation. For this flight scenario, a closed-form solution that can be derived using a minimum of two pairs of conjugate points is established. In order to evaluate the performance of the proposed approach, experimental tests using real stereo-pairs acquired from different UAV platforms have been conducted. The derived results from the comparative performance analysis against the Nistér five-point approach demonstrate that the proposed two-point approach is capable of providing reliable estimate of the ROPs from UAV-based imagery in the presence of poor and/or repetitive texture with high percentage of matching outliers.

  16. Performance Evaluation of Alternative Relative Orientation Procedures for UAV-based Imagery with Prior Flight Trajectory Information

    Directory of Open Access Journals (Sweden)

    F. He

    2016-06-01

    Full Text Available Thanks to recent advances at the hardware (e.g., emergence of reliable platforms at low cost and software (e.g., automated identification of conjugate points in overlapping images levels, UAV-based 3D reconstruction has been widely used in various applications. However, mitigating the impact of outliers in automatically matched points in UAV imagery, especially when dealing with scenes that has poor and/or repetitive texture, remains to be a challenging task. In spite of the fact that existing literature has already demonstrated that incorporating prior motion information can play an important role in increasing the reliability of the matching process, there is a lack of methodologies that are mainly suited for UAV imagery. Assuming the availability of prior information regarding the trajectory of a UAV-platform, this paper presents a two-point approach for reliable estimation of Relative Orientation Parameters (ROPs of UAV-based images. This approach is based on the assumption that the UAV platform is moving at a constant flying height while maintaining the camera in a nadir-looking orientation. For this flight scenario, a closed-form solution that can be derived using a minimum of two pairs of conjugate points is established. In order to evaluate the performance of the proposed approach, experimental tests using real stereo-pairs acquired from different UAV platforms have been conducted. The derived results from the comparative performance analysis against the Nistér five-point approach demonstrate that the proposed two-point approach is capable of providing reliable estimate of the ROPs from UAV-based imagery in the presence of poor and/or repetitive texture with high percentage of matching outliers.

  17. Measuring quality of occupational performance based on self-report and observation : development and validation of instruments to evaluate ADL task performance

    OpenAIRE

    Waehrens, Eva Ejlersen

    2010-01-01

    Background People with rheumatic or neurologic conditions are commonly referred for occupational therapy because of decreased ability to perform ADL tasks. Upon referral, occupational therapists use a client-centred, occupationfocused approach when evaluating a person's perceived and observed quality of ADL task performance to clarify the nature and extent of the person’s problems, plan interventions and determine effectiveness of interventions. Evaluation of the extent of problems and change...

  18. Evaluation of sloshing resistance performance for LNG carrier insulation system based on fluid-structure interaction analysis

    Science.gov (United States)

    Lee, Chi-Seung; Cho, Jin-Rae; Kim, Wha-Soo; Noh, Byeong-Jae; Kim, Myung-Hyun; Lee, Jae-Myung

    2013-03-01

    In the present paper, the sloshing resistance performance of a huge-size LNG carrier's insulation system is evaluated by the fluid-structure interaction (FSI) analysis. To do this, the global-local analysis which is based on the arbitrary Lagrangian-Eulerian (ALE) method is adopted to accurately calculate the structural behavior induced by internal LNG sloshing of a KC-1 type LNG carrier insulation system. During the global analysis, the sloshing flow and hydrodynamic pressure of internal LNG are analyzed by postulating the flexible insulation system as a rigid body. In addition, during the local analysis, the local hydroelastic response of the LNG carrier insulation system is computed by solving the local hydroelastic model where the entire and flexible insulation system is adopted and the numerical analysis results of the global analysis such as initial and boundary conditions are implemented into the local finite element model. The proposed novel analysis techniques can potentially be used to evaluate the structural integrity of LNG carrier insulation systems.

  19. Room for Improvement: Performance Evaluations.

    Science.gov (United States)

    Webb, Gisela

    1989-01-01

    Describes a performance management approach to library personnel management that stresses communication, clarification of goals, and reinforcement of new practices and behaviors. Each phase of the evaluation process (preparation, rating, administrative review, appraisal interview, and follow-up) and special evaluations to be used in cases of…

  20. Evaluation of a BGO-Based PET System for Single-Cell Tracking Performance by Simulation and Phantom Studies

    Directory of Open Access Journals (Sweden)

    Yu Ouyang PhD

    2016-05-01

    Full Text Available A recent method based on positron emission was reported for tracking moving point sources using the Inveon PET system. However, the effect of scanner background noise was not further explored. Here, we evaluate tracking with the Genisys4, a bismuth germanate-based PET system, which has no significant intrinsic background and may be better suited to tracking lower and/or faster activity sources. Position-dependent sensitivity of the Genisys4 was simulated in Geant4 Application for Tomographic Emission (GATE using a static 18F point source. Trajectories of helically moving point sources with varying activity and rotation speed were reconstructed from list-mode data as described previously. Simulations showed that the Inveon’s ability to track sources within 2 mm of localization error is limited to objects with a velocity-to-activity ratio < 0.13 mm/decay, compared to < 0.29 mm/decay for the Genisys4. Tracking with the Genisys4 was then validated using a physical phantom of helically moving [18F] fluorodeoxyglucose-in-oil droplets (< 0.24 mm diameter, 139-296 Bq, yielding < 1 mm localization error under the tested conditions, with good agreement between simulated sensitivity and measured activity (Pearson correlation R = .64, P << .05 in a representative example. We have investigated the tracking performance with the Genisys4, and results suggest the feasibility of tracking low activity, point source-like objects with this system.

  1. Performance-based liquefaction hazard evaluation%基于性态的液化危险性估计

    Institute of Scientific and Technical Information of China (English)

    符圣聪; 江静贝; 黄世敏

    2011-01-01

    利用地震事件出现概率及给定地震事件的液化条件概率可估计液化的危险性。液化条件概率由binary-logistic模型对液化和未液化历史情况的基本数据进行回归分析确定;给定地震事件出现概率来自常规的地震动危险性的概率分析。基于性态地震工程理念,将液化安全系数和标准贯入锤击数(SPT)分别作为工程需求参数,计算特定场址液化概率。计算结果可用液化安全系数或液化需求锤击数的危险曲线来表示。基于性态的液化危险性估计途径可能比常规的方法更合理和一致地预测不同地震区场址出现液化的可能性。应用上述方法对北京地区不同地段各种设定土层情况进行液化危险性分析,分别得到了液化危险曲线。为便于工程应用,根据上述分析得到的大量样本及液化标准贯入锤击数基准值概念和土层埋深水位影响系数,提出了北京地区液化危险性评估的简化方法。相信其他地震区采用类同的方法也会得到适合该地区的液化危险性分析结果。%The liquefaction condition probability of given seismic event and the annual probability of a seismic event are used to estimate liquefaction hazard at a specific site.The liquefaction condition probability is derived by the method of binary-logistic regression to analyze the database of field case histories of liquefaction and nonliquefaction occurrences.The annual probability of a seismic event is given by conventional earthquake hazard analysis.According to the conception of performance-based earthquake engineering,the factor of safety against liquefaction and penetration resistance are respectively adopted as a demand parameter for evaluation of liquefaction potential.The results can be expressed by hazard curves for factor of safety against liquefaction or demand penetration resistance.The performance-based approach could predict liquefaction hazard more accurately and

  2. Tribological performance evaluation of tungsten carbide-based cermets and development of a fracture mechanics wear model

    Energy Technology Data Exchange (ETDEWEB)

    Bhagat, R.B. [Pennsylvania State Univ., State College, PA (United States). Applied Research Lab.; Conway, J.C. Jr. [Pennsylvania State Univ., State College, PA (United States). Applied Research Lab.; Amateau, M.F. [Pennsylvania State Univ., State College, PA (United States). Applied Research Lab.; Brezler, R.A. III [Pennsylvania State Univ., State College, PA (United States). Applied Research Lab.

    1996-12-15

    Tungsten carbide tools may exhibit sudden brittle fracture at high stresses such as are encountered in shear and slitter knives. This has limited the use of tungsten carbide tools to certain applications in spite of their high hardness and wear resistance. The objective of this investigation is to evaluate the tribological performance of selected cermets and develop a fracture mechanics wear model. Six compositions of WC-Co materials (Co ranging from 4 to 30% by weight) with or without TiC, NbC, TaC, or Mo{sub 2}C were selected for relating wear modes of these tool materials to pertinent mechanical properties such as fracture toughness and hardness. The influence of mechanical properties such as Young`s modulus, hardness, fracture toughness, modulus of rupture, and Weibull modulus on wear rates and wear modes of the selected materials is presented and discussed. The major mechanisms of wear in WC-Co materials are discussed as they apply to the development of suitable relationships between wear and mechanical properties. The wear process is by the transfer of steel from the ring to the cemented carbide block specimens, initiation of mode I cracks normal to the mating surface, propagation of mode II cracks parallel to the wear surfaces and the subsequent separation of platelets with adhered WC and Co particles through adhesive forces with the steel ring. The wear rates of the cermets do not show a consistent relationship with mode I or mode II fracture toughness, but a general trend of decreasing wear rate with hardness is seen. This suggests that the tribological performance of these cermets depends on certain specific functions of pertinent parameters including fracture toughness, hardness, applied load, coefficient of friction and microstructural characteristics. A fracture mechanics-based wear model has been developed to relate the steady state wear rate (W{sub ss}) to hardness, mode II fracture toughness, coefficient of friction, and applied load. (orig./MM)

  3. Evaluating Judicial Performance Evaluation: A Conceptual Analysis

    Directory of Open Access Journals (Sweden)

    Joe McIntyre

    2014-12-01

    Full Text Available While the performance evaluation of judges has become a ubiquitous aspect of modern judicial administration, evaluation mechanisms of are too often utilised uncritically, without reflection on why we evaluate judges, and how ‘measurement’ furthers these objectives. This article provides a conceptual analysis of the role and purpose of performance evaluation, conceiving it as a limited tool of judicial accountability, which itself exists only to promote excellent judging. As such, the efficacy of evaluation mechanisms must always be assessed by reference to their impact on these overarching accountability objectives. The article explores the value of this conception approach by briefly examining three uses of performance evaluation: 1 judicial promotions; 2 judicial retention elections; and 3 judicial professional development. In doing so it illustrates how a clear conceptual approach invites a more nuanced and critical examination of the limitations and benefits of judicial performance evaluation programs. Mientras que la evaluación del rendimiento de los jueces se ha convertido en un aspecto omnipresente de la administración judicial moderna, los mecanismos de evaluación se utilizan con demasiada frecuencia de manera acrítica, sin reflexionar sobre las razones por las que evaluamos a los jueces, y cómo se alcanzan los objetivos buscados mediante la 'medición'. Este artículo ofrece un análisis conceptual de la función y el propósito de la evaluación del rendimiento, concibiéndola como una herramienta limitada de la responsabilidad judicial, que a su vez sólo existe para promover la excelencia judicial. Como tal, la eficacia de los mecanismos de evaluación siempre se debe comprobar en función de su impacto en los objetivos de responsabilidad globales. El artículo explora el valor de este enfoque examinando brevemente tres usos de la evaluación de rendimiento: 1 promociones judiciales; 2 elecciones para la reelección de

  4. Performance evaluation of Central European companies

    Directory of Open Access Journals (Sweden)

    Petr Fiala

    2015-10-01

    Full Text Available The paper presents a modelling approach for performance comparison of Central European companies on three levels: country, industry, and company. The approach is based on Data Envelopment Analysis and Analytic Hierarchy Process. The proposed model consists of two basic sections. The first section estimates the importance of selected industries in the countries, whereas the second section evaluates the performance of companies within industries. The results of both sections are synthesized and finally the country performance is estimated. The evaluation is based on the data set resulting from a survey of companies from selected industries.

  5. A PERFORMANCE EVALUATION INDEX SYSTEM FOR MULTIMEDIA COMMUNICATION NETWORKS AND FORECASTING FOR WEB-BASED NETWORK TRAFFIC

    Institute of Scientific and Technical Information of China (English)

    Wuyi YUE; Jifa GU; Xijin TANG

    2004-01-01

    This paper presents a new index system for the performance evaluation and network planning of multimedia communication systems using measurement on actual systems to support several different traffic types. In this index system, we develop an expert system to evaluate the performance of such multimedia communication networks including channel utilization and call blocking probability andpacket delay, and apply the network planning methods to optimize the networks and forecast thedemand of the growing multimedia communications systems. Two important planning problems for the multimedia communication systems are presented: optimization problem for construction of the world system and forecast problem for increasing traffic demands. We first discuss analysis methods,performance measures for the multimedia communication systems. Then, we describe network planning methods for the multimedia communication systems and give some efficiency network planning methods. Finally, we present some results studied in traffic forecast for the campus network and show the effectiveness of these methods.

  6. Evaluating the performance of two neutron spectrum unfolding codes based on iterative procedures and artificial neural networks

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz-Rodriguez, J. M.; Reyes Alfaro, A.; Reyes Haro, A.; Solis Sanches, L. O.; Miranda, R. Castaneda; Cervantes Viramontes, J. M. [Universidad Autonoma de Zacatecas, Unidad Academica de Ingenieria Electrica. Av. Ramon Lopez Velarde 801. Col. Centro Zacatecas, Zac (Mexico); Vega-Carrillo, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Ingenieria Electrica. Av. Ramon Lopez Velarde 801. Col. Centro Zacatecas, Zac., Mexico. and Unidad Academica de Estudios Nucleares. C. Cip (Mexico)

    2013-07-03

    In this work the performance of two neutron spectrum unfolding codes based on iterative procedures and artificial neural networks is evaluated. The first one code based on traditional iterative procedures and called Neutron spectrometry and dosimetry from the Universidad Autonoma de Zacatecas (NSDUAZ) use the SPUNIT iterative algorithm and was designed to unfold neutron spectrum and calculate 15 dosimetric quantities and 7 IAEA survey meters. The main feature of this code is the automated selection of the initial guess spectrum trough a compendium of neutron spectrum compiled by the IAEA. The second one code known as Neutron spectrometry and dosimetry with artificial neural networks (NDSann) is a code designed using neural nets technology. The artificial intelligence approach of neural net does not solve mathematical equations. By using the knowledge stored at synaptic weights on a neural net properly trained, the code is capable to unfold neutron spectrum and to simultaneously calculate 15 dosimetric quantities, needing as entrance data, only the rate counts measured with a Bonner spheres system. Similarities of both NSDUAZ and NSDann codes are: they follow the same easy and intuitive user's philosophy and were designed in a graphical interface under the LabVIEW programming environment. Both codes unfold the neutron spectrum expressed in 60 energy bins, calculate 15 dosimetric quantities and generate a full report in HTML format. Differences of these codes are: NSDUAZ code was designed using classical iterative approaches and needs an initial guess spectrum in order to initiate the iterative procedure. In NSDUAZ, a programming routine was designed to calculate 7 IAEA instrument survey meters using the fluence-dose conversion coefficients. NSDann code use artificial neural networks for solving the ill-conditioned equation system of neutron spectrometry problem through synaptic weights of a properly trained neural network. Contrary to iterative procedures, in

  7. Evaluating the performance of different predictor strategies in regression-based downscaling with a focus on glacierized mountain environments

    Science.gov (United States)

    Hofer, Marlis; Nemec, Johanna

    2016-04-01

    This study presents first steps towards verifying the hypothesis that uncertainty in global and regional glacier mass simulations can be reduced considerably by reducing the uncertainty in the high-resolution atmospheric input data. To this aim, we systematically explore the potential of different predictor strategies for improving the performance of regression-based downscaling approaches. The investigated local-scale target variables are precipitation, air temperature, wind speed, relative humidity and global radiation, all at a daily time scale. Observations of these target variables are assessed from three sites in geo-environmentally and climatologically very distinct settings, all within highly complex topography and in the close proximity to mountain glaciers: (1) the Vernagtbach station in the Northern European Alps (VERNAGT), (2) the Artesonraju measuring site in the tropical South American Andes (ARTESON), and (3) the Brewster measuring site in the Southern Alps of New Zealand (BREWSTER). As the large-scale predictors, ERA interim reanalysis data are used. In the applied downscaling model training and evaluation procedures, particular emphasis is put on appropriately accounting for the pitfalls of limited and/or patchy observation records that are usually the only (if at all) available data from the glacierized mountain sites. Generalized linear models and beta regression are investigated as alternatives to ordinary least squares regression for the non-Gaussian target variables. By analyzing results for the three different sites, five predictands and for different times of the year, we look for systematic improvements in the downscaling models' skill specifically obtained by (i) using predictor data at the optimum scale rather than the minimum scale of the reanalysis data, (ii) identifying the optimum predictor allocation in the vertical, and (iii) considering multiple (variable, level and/or grid point) predictor options combined with state

  8. Economics of place-based monitoring under the safe drinking water act, part III: performance evaluation of place-based monitoring strategies.

    Science.gov (United States)

    Brands, Edwin; Rajagopal, R

    2008-08-01

    The goals of environmental legislation and associated regulations are to protect public health, natural resources, and ecosystems. In this context, monitoring programs should provide timely and relevant information so that the regulatory community can implement legislation in a cost-effective and efficient manner. The Safe Drinking Water Act (SDWA) of 1974 attempts to ensure that public water systems (PWSs) supply safe water to its consumers. As is the case with many other federal environmental statutes, SDWA monitoring has been implemented in relatively uniform fashion across the USA. In this three part series, we present over 30 years of evidence to demonstrate unique patterns in water quality contaminants over space and time, develop alternative place-based monitoring approaches that exploit such patterns, and evaluate the economic performance of such approaches to current monitoring practice. Part III: Place-based (PBA) and current SDWA monitoring approaches were implemented on test datasets (1995-2001) from 19 water systems and evaluated based on the following criteria: percent of total detections, percent detections above threshold values (e.g. 20, 50, 90% of MCL), and cost. The PBA outperformed the current SDWA monitoring requirements in terms of total detections, missed only a small proportion of detections below the MCL, and captured all detections above 50% of the MCL. Essentially the same information obtained from current compliance monitoring requirements can be gained at approximately one-eighth the cost by implementing the PBA. Temporal sampling strategies were implemented on test datasets (1995-2001) from four water systems and evaluated by the following criteria: parameter estimation, percent deviation from "true" 90th, 95th, and 99th percentiles, and number of samples versus accuracy of the estimate. Non event-based (NEB) strategies were superior in estimating percentiles 1-50, but underestimated the higher percentiles. Event-based strategies were

  9. Race to the Top: evaluation of a novel performance-based financing initiative to promote healthcare delivery in rural Rwanda

    Directory of Open Access Journals (Sweden)

    Evrard Nahimana

    2016-11-01

    Full Text Available Background: Performance-based financing (PBF has demonstrated a range of successes and failures in improving health outcomes across low- and middle-income countries. Evidence indicates that the success of PBF depends, in large part, on the model selected, in relation to a variety of contextual factors. Objective: Partners In Health∣Inshuti Mu Buzima aimed to evaluate health outcomes associated with a novel capacity-building model of PBF at health centers throughout Kirehe district, Rwanda. Design: Thirteen health centers in Kirehe district, which provide healthcare to a population of over 300,000 people, agreed to participate in a PBF initiative scheme that integrated data feedback, quality improvement coaching, peer-to-peer learning, and district-level priority setting. Health centers’ progress toward collectively agreed upon site-specific health targets was assessed every 6 months for 18 months. Incentives were awarded only when health centers met goals on all three priorities health centers had collectively agreed upon: 90% coverage of community-based health insurance, 70% contraceptive prevalence rate, and zero acute severe malnutrition cases. Improvement across all four time points and facilities was measured using mixed-effects linear regression. Findings: At 6-month follow-up, 4 of 13 health centers had met 1 target. At 12-month follow-up, 7 centers had met 1 target, and by 18-month follow-up, 6 centers had met 2 targets and 2 centers had met all 3. Average health center performance had improved significantly across the district for all three targets: mean insurance coverage increased from 68% at baseline to 93% (p<0.001; mean number of acute malnutrition cases in the previous 6 months declined from 24 to 5 per facility (p<0.001; and contraceptive prevalence increased from 42 to 59% (p<0.001. A number of innovative improvement initiatives were identified. Conclusion: The combining of PBF, district engagement/support, and peer

  10. A State of the Art Review- Methods to Evaluate Electrical Performance of Composite Cross-arms and Composite-based Pylons

    DEFF Research Database (Denmark)

    Wang, Qian; Bak, Claus Leth; Silva, Filipe Miguel Faria da;

    2016-01-01

    A novel uni-body composite pylon has been proposed for 400 kV transmission lines with advantages of compacted size, friendly looking and cost competitiveness. As its configuration is quite different from the traditional lattice pylon, its electrical performance needs in-depth investigation...... and evaluation, for which electrical testing methods are essential. However, as research on composite-based pylons is still in initial stage, leaving international standards and theoretical analysis on this topic very limited, effective testing methods to evaluate the fully composite pylon’s electrical...... performance need to be studied. This paper sums up experience and key advances on testing methods to evaluate electrical performance of composite cross-arms and composite-based pylons. Based on state of the art review, several feasible testing methods that can be used to verify the feasibility of the novel...

  11. The Performance Evaluation of AODV-based and DSR-based Multi-radio Routing Protocols in Cognitive Radio Ad Hoc Network

    Directory of Open Access Journals (Sweden)

    Zamree Che-aron

    2013-07-01

    Full Text Available Due to the huge advancement of wireless technologies, the radio spectrum is one of the most heavily used and costly natural resources. Cognitive Radio (CR is a promising technology to solve the problem of radio spectrum shortage and spectrum underutilization by enabling unlicensed users to opportunistically access the available licensed bands in an intelligent and cautious manner. In Cognitive Radio Ad Hoc Networks (CRAHNs, which operate without centralized administration, the data routing is one of the most important issues to be taken into account and requires more study. In this study, we analyze and evaluate the performance of AODV-based and DSR-based multi-radio routing protocols (AODV-MR, extended DSR and MR-LQSR in CRAHN using simulations in NS-2. The metrics used for performance analysis are average throughput, average end-to-end delay and average jitter. From the simulation results, it is observed that the MR-LQSR protocol provides better performance in term of average throughput and gives smallest number of dropped packets. Whereas the extended DSR gives better results of average end-to-end delay and average jitter.

  12. Performance Evaluation of Security Protocols

    DEFF Research Database (Denmark)

    Bodei, Chiara; Buchholtz, Mikael; Curti, Michele

    2005-01-01

    We use a special operational semantics which drives us in inferring quantitative measures on systems describing cryptographis cryptographic protocols. We assign rates to transitions by only looking at these labels. The rates reflect the distributed architecture running applications and the use of...... of possibly different cryptosystems. We then map transition systems to Markov chains and evaluate performance of systems, using standard tools....

  13. A flat-panel detector based micro-CT system: performance evaluation for small-animal imaging

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Sang Chul; Kim, Ho Kyung; Chun, In Kon; Cho, Myung Hye; Lee, Soo Yeol; Cho, Min Hyoung [Graduate School of East-West Medical Science, Kyung Hee University, 1 Seochun, Kiheung, Yongin, Kyungki 449-701 (Korea, Republic of)

    2003-12-21

    A dedicated small-animal x-ray micro computed tomography (micro-CT) system has been developed to screen laboratory small animals such as mice and rats. The micro-CT system consists of an indirect-detection flat-panel x-ray detector with a field-of-view of 120 x 120 mm{sup 2}, a microfocus x-ray source, a rotational subject holder and a parallel data processing system. The flat-panel detector is based on a matrix-addressed photodiode array fabricated by a CMOS (complementary metal-oxide semiconductor) process coupled to a CsI:Tl (thallium-doped caesium iodide) scintillator as an x-ray-to-light converter. Principal imaging performances of the micro-CT system have been evaluated in terms of image uniformity, voxel noise and spatial resolution. It has been found that the image non-uniformity mainly comes from the structural non-uniform sensitivity pattern of the flat-panel detector and the voxel noise is about 48 CT numbers at the voxel size of 100 x 100 x 200 {mu}m{sup 3} and the air kerma of 286 mGy. When the magnification ratio is 2, the spatial resolution of the micro-CT system is about 14 lp/mm (line pairs per millimetre) that is almost determined by the flat-panel detector showing about 7 lp/mm resolving power. Through low-contrast phantom imaging studies, the minimum resolvable contrast has been found to be less than 36 CT numbers at the air kerma of 95 mGy. Some laboratory rat imaging results are presented.

  14. Evaluating an undergraduate interprofessional simulation-based educational module: communication, teamwork, and confidence performing cardiac resuscitation skills

    Directory of Open Access Journals (Sweden)

    Marian Luctkar-Flude

    2010-11-01

    Full Text Available Marian Luctkar-Flude1, Cynthia Baker1, Cheryl Pulling1, Robert McGraw2, Damon Dagnone2, Jennifer Medves1, Carly Turner-Kelly11School of Nursing, Queen’s University, Kingston, Ontario, Canada; 2School of Medicine, Queen’s University, Kingston, Ontario, CanadaPurpose: Interprofessional (IP collaboration during cardiac resuscitation is essential and contributes to patient wellbeing. The purpose of this study is to evaluate an innovative simulation-based IP educational module for undergraduate nursing and medical students on cardiac resuscitation skills.Methods: Nursing and medical trainees participated in a new cardiac resuscitation curriculum involving a 2-hour IP foundational cardiac resuscitation skills lab, followed by three 2-hour IP simulation sessions. Control group participants attended the existing two 2-hour IP simulation sessions. Study respondents (N = 71 completed a survey regarding their confidence performing cardiac resuscitation skills and their perceptions of IP collaboration.Results: Despite a consistent positive trend, only one out of 17 quantitative survey items were significantly improved for learners in the new curriculum. They were more likely to report feeling confident managing the airway during cardiac resuscitation (P = 0.001. Overall, quantitative results suggest that senior nursing and medical students were comfortable with IP communication and teamwork and confident with cardiac resuscitation skills. There were no significant differences between nursing students’ and medical students’ results. Through qualitative feedback, participants reported feeling comfortable learning with students from other professions and found value in the IP simulation sessions.Conclusion: Results from this study will inform ongoing restructuring of the IP cardiac resuscitation skills simulation module as defined by the action research process. Specific improvements that are suggested by these findings include strengthening the team

  15. Evaluating model performance of an ensemble-based chemical data assimilation system during INTEX-B field mission

    Directory of Open Access Journals (Sweden)

    A. F. Arellano Jr.

    2007-11-01

    Full Text Available We present a global chemical data assimilation system using a global atmosphere model, the Community Atmosphere Model (CAM3 with simplified chemistry and the Data Assimilation Research Testbed (DART assimilation package. DART is a community software facility for assimilation studies using the ensemble Kalman filter approach. Here, we apply the assimilation system to constrain global tropospheric carbon monoxide (CO by assimilating meteorological observations of temperature and horizontal wind velocity and satellite CO retrievals from the Measurement of Pollution in the Troposphere (MOPITT satellite instrument. We verify the system performance using independent CO observations taken on board the NSF/NCAR C-130 and NASA DC-8 aircrafts during the April 2006 part of the Intercontinental Chemical Transport Experiment (INTEX-B. Our evaluations show that MOPITT data assimilation provides significant improvements in terms of capturing the observed CO variability relative to no MOPITT assimilation (i.e. the correlation improves from 0.62 to 0.71, significant at 99% confidence. The assimilation provides evidence of median CO loading of about 150 ppbv at 700 hPa over the NE Pacific during April 2006. This is marginally higher than the modeled CO with no MOPITT assimilation (~140 ppbv. Our ensemble-based estimates of model uncertainty also show model overprediction over the source region (i.e. China and underprediction over the NE Pacific, suggesting model errors that cannot be readily explained by emissions alone. These results have important implications for improving regional chemical forecasts and for inverse modeling of CO sources and further demonstrate the utility of the assimilation system in comparing non-coincident measurements, e.g. comparing satellite retrievals of CO with in-situ aircraft measurements.

  16. A flat-panel detector based micro-CT system: performance evaluation for small-animal imaging.

    Science.gov (United States)

    Lee, Sang Chul; Kim, Ho Kyung; Chun, In Kon; Cho, Myung Hye; Lee, Soo Yeol; Cho, Min Hyoung

    2003-12-21

    A dedicated small-animal x-ray micro computed tomography (micro-CT) system has been developed to screen laboratory small animals such as mice and rats. The micro-CT system consists of an indirect-detection flat-panel x-ray detector with a field-of-view of 120 x 120 mm2, a microfocus x-ray source, a rotational subject holder and a parallel data processing system. The flat-panel detector is based on a matrix-addressed photodiode array fabricated by a CMOS (complementary metal-oxide semiconductor) process coupled to a CsI:T1 (thallium-doped caesium iodide) scintillator as an x-ray-to-light converter. Principal imaging performances of the micro-CT system have been evaluated in terms of image uniformity, voxel noise and spatial resolution. It has been found that the image non-uniformity mainly comes from the structural non-uniform sensitivity pattern of the flat-panel detector and the voxel noise is about 48 CT numbers at the voxel size of 100 x 100 x 200 microm3 and the air kerma of 286 mGy. When the magnification ratio is 2, the spatial resolution of the micro-CT system is about 14 1p/mm (line pairs per millimetre) that is almost determined by the flat-panel detector showing about 7 1p/mm resolving power. Through low-contrast phantom imaging studies, the minimum resolvable contrast has been found to be less than 36 CT numbers at the air kerma of 95 mGy. Some laboratory rat imaging results are presented.

  17. Catching up with the Vaughn express: Six years of standards-based teacher evaluation and performance pay.

    Directory of Open Access Journals (Sweden)

    Eileen M. Kellor

    2005-01-01

    Full Text Available Traditional methods of paying and evaluating teachers in the United States are longstanding, but discussions about changing these systems to support teacher quality and student achievement goals are becoming more common. Efforts to make significant changes to these programs can be difficult and take many years to design, gain approval, and implement; thus, few examples of alternative teacher compensation and evaluation systems exist. Relieved from many of the restrictions and requirements associated with most traditional public school systems, charter schools often are better positioned to implement changes more quickly than a traditional school, yet their experiences can provide useful information for others who are engaging in similar activities. Thus, the experience of a large urban charter school that designed and implemented an innovative teacher compensation system and standards-based teacher evaluation system that has been in place for six years offers important lessons in designing, implementing, evaluating and refining these systems.

  18. Performance evaluation of ant colony optimization-based solution strategies on the mixed-model assembly line balancing problem

    Science.gov (United States)

    Akpinar, Sener; Mirac Bayhan, G.

    2014-06-01

    The aim of this article is to compare the performances of iterative ant colony optimization (ACO)-based solution strategies on a mixed-model assembly line balancing problem of type II (MMALBP-II) by addressing some particular features of real-world assembly line balancing problems such as parallel workstations and zoning constraints. To solve the problem, where the objective is to minimize the cycle time (i.e. maximize the production rate) for a predefined number of workstations in an existing assembly line, two ACO-based approaches which differ in the mission assigned to artificial ants are used. Furthermore, each ACO-based approach is conducted with two different pheromone release strategies: global and local pheromone updating rules. The four ACO-based approaches are used for solving 20 representative MMALBP-II to compare their performance in terms of computational time and solution quality. Detailed comparison results are presented.

  19. A State-Based Modeling Approach for Efficient Performance Evaluation of Embedded System Architectures at Transaction Level

    Directory of Open Access Journals (Sweden)

    Anthony Barreteau

    2012-01-01

    Full Text Available Abstract models are necessary to assist system architects in the evaluation process of hardware/software architectures and to cope with the still increasing complexity of embedded systems. Efficient methods are required to create reliable models of system architectures and to allow early performance evaluation and fast exploration of the design space. In this paper, we present a specific transaction level modeling approach for performance evaluation of hardware/software architectures. This approach relies on a generic execution model that exhibits light modeling effort. Created models are used to evaluate by simulation expected processing and memory resources according to various architectures. The proposed execution model relies on a specific computation method defined to improve the simulation speed of transaction level models. The benefits of the proposed approach are highlighted through two case studies. The first case study is a didactic example illustrating the modeling approach. In this example, a simulation speed-up by a factor of 7,62 is achieved by using the proposed computation method. The second case study concerns the analysis of a communication receiver supporting part of the physical layer of the LTE protocol. In this case study, architecture exploration is led in order to improve the allocation of processing functions.

  20. Improvement of Automotive Part Supplier Performance Evaluation

    Science.gov (United States)

    Kongmunee, Chalermkwan; Chutima, Parames

    2016-05-01

    This research investigates the problem of the part supplier performance evaluation in a major Japanese automotive plant in Thailand. Its current evaluation scheme is based on experiences and self-opinion of the evaluators. As a result, many poor performance suppliers are still considered as good suppliers and allow to supply parts to the plant without further improvement obligation. To alleviate this problem, the brainstorming session among stakeholders and evaluators are formally conducted. The result of which is the appropriate evaluation criteria and sub-criteria. The analytical hierarchy process is also used to find suitable weights for each criteria and sub-criteria. The results show that a newly developed evaluation method is significantly better than the previous one in segregating between good and poor suppliers.

  1. Based on Grey Fuzzy Evaluation of Water Conservancy Project Management Performance Evaluation%基于灰色模糊评价的水利工程管理绩效评价

    Institute of Scientific and Technical Information of China (English)

    陈茜

    2015-01-01

    This paper introduces the performance evaluation based on grey fuzzy evaluation of water conservancy project management research significance,based on grey fuzzy evaluation of the performance evaluation of water conservancy project management research present situation,and improve the grey fuzzy evaluation of water conservancy project management performance evaluation of research that the strategy has carried on the deep discussion and analysis.%文中简单介绍了基于灰色模糊评价的水利工程管理绩效评价研究意义,针对基于灰色模糊评价的水利工程管理绩效评价研究现状,以及提高灰色模糊评价的水利工程管理绩效评价研究效果策略进行了深入的探讨和分析。

  2. A State of the Art Review- Methods to Evaluate Electrical Performance of Composite Cross-arms and Composite-based Pylons

    DEFF Research Database (Denmark)

    Wang, Qian; Bak, Claus Leth; Silva, Filipe Miguel Faria da;

    2016-01-01

    performance need to be studied. This paper sums up experience and key advances on testing methods to evaluate electrical performance of composite cross-arms and composite-based pylons. Based on state of the art review, several feasible testing methods that can be used to verify the feasibility of the novel......A novel uni-body composite pylon has been proposed for 400 kV transmission lines with advantages of compacted size, friendly looking and cost competitiveness. As its configuration is quite different from the traditional lattice pylon, its electrical performance needs in-depth investigation...

  3. Evaluating Judicial Performance: Editors’ Introduction

    Directory of Open Access Journals (Sweden)

    Francesco Contini

    2014-12-01

    Full Text Available The articles in this issue tackle the conceptual issues associated with defining good judging and the purposes of evaluating judges, and ask such questions as: What values are central to the judicial role? What knowledge, skills, abilities, and other qualities are important to judicial performance? What does scholarship tell us about judging and judicial performance? What are the challenges in measuring judicial performance, the extent to which existing evaluation programs can capture what it means to be a judge, and the potential for developing multi-method evaluation programs? An underlying theme is the nature and desirability of linking evaluations of individual judges with evaluations of the court system and the ways in which results from performance evaluation can be incorporated into educational and other programs designed to promote improvements in the quality of the judiciary. The papers cluster around three major themes: (i Conceptual and methodological issues; (ii Experiences of evaluating judges; and (iii Empirical research findings. Los artículos de este número abordan aspectos conceptuales asociados con el hecho de juzgar de forma correcta y los propósitos de evaluar a los jueces, y plantean preguntas como: ¿qué valores son básicos en el rol judicial? ¿Qué conocimiento, aptitudes, habilidades y otras cualidades son importantes para el rendimiento judicial? ¿Qué nos dice el mundo académico sobre el hecho de juzgar y el rendimiento judicial? ¿Cuáles son los retos en la medición del rendimiento judicial, hasta qué punto los programas de evaluación existentes pueden capturar lo que significa ser un juez, y el potencial para desarrollar programas de evaluación multidisciplinares? Un tema subyacente es la naturaleza y la deseabilidad de unir evaluaciones de jueces individuales con evaluaciones del sistema judicial, y las formas en las que los resultados del rendimiento judicial se pueden incorporar en programas educativos

  4. MCDA-C Methodology Based Performance Evaluation of Small and Medium-Sized Businesses at the City of Lages

    Directory of Open Access Journals (Sweden)

    Marcelo Nascimento

    2013-12-01

    Full Text Available When employed in a focused manner, corporate performance evaluation has proven to be instrumental for entrepreneurs as an important tool that contributes with performance improvements at their organizations. The descriptive study herein, prepared as of a questionnaire comprising 46 queries, poses to analyse the performance of micro and small companies (MSEs by employing the multicriteria methodology for constructive decision aiding (MCDA-C. As of respondent replies, MCDA-C descriptors were formed, shaping six prime groups so as to identify relevant factors that drive or hinder MSE success. The questionnaire was applied to managers in charge administering 25 small and medium-sized companies of Lages, a city within the Brazilian state of Santa Catarina. Study findings provide evidence as to the fact that (i 24% of surveyed companies, tend to go bankrupt; (ii managerial functions at the MSEs are the prime source of influence on negative outcomes; (iii from a financial control standpoint, surveyed companies fall far shorter than the minimum level deemed necessary to qualify as satisfactory; (iv those that present the best results, operate both within the domestic and international markets; (v the study placed under the spotlight the group “Evolution Stage”, evidencing the trend of ever increasing MSE expansion. This study revealed that corporate failure contributing factors are intensely interconnected and largely depend on the entrepreneur´s own performance, the prime contribution of findings residing in demonstrating that MCDA-C can be employed to analyse the performance of micro and small businesses.

  5. Proposal and Performance Evaluation of a Multicast Routing Protocol for Wireless Mesh Networks Based on Network Load

    Directory of Open Access Journals (Sweden)

    Kiyotaka Oe

    2015-01-01

    Full Text Available Wireless Mesh Networks (WMNs can provide wide range Wireless Local Area Networks (WLANs area by connecting Access Points (APs of WLANs with each other using radio communications. A routing protocol is very important to keep communication quality over radio multihop communications because radio waves are impacted much by surrounding environment. When we use multiuser shared applications like a video conference and an IP phone, it is predicted that large amount of traffic flows on network. Therefore, we should consider network loads to use these applications. In this paper, we propose a multicast routing protocol for WMNs which considers network loads and hop count. Furthermore, we evaluate performance by simulation. In the simulation results, we show that the proposed protocol has better performance than a conventional protocol (MAODV at high loaded scenario.

  6. Synthesis and Performance Evaluation of a New Deoiling Agent for Treatment of Waste Oil-Based Drilling Fluids

    Directory of Open Access Journals (Sweden)

    Pingting Liu

    2014-01-01

    Full Text Available Oil-based drilling fluid is used more and more in the field of oil and gas exploration. However, because of unrecyclable treating agent and hard treatment conditions, the traditional treating technologies of waste oil-based drilling fluid have some defects, such as waste of resource, bulky equipment, complex treatment processes, and low oil recovery rate. In this work, switchable deoiling agent (SDA, as a novel surfactant for treatment of waste oil-based drilling fluid, was synthesized by amine, formic acid, and formaldehyde solution. With this agent, the waste oil-based drilling fluid can be treated without complex process and expensive equipment. Furthermore, the agent used in the treatment can be recycled, which reduces waste of resource and energy. The switch performance, deoiling performance, structural characterization, and mechanisms of action are studied. The experimental results show that the oil content of the recycled oil is higher than 96% and more than 93% oil in waste oil-based drilling fluid can be recycled. The oil content of the solid residues of deoiling is less than 3%.

  7. Performance based fault diagnosis

    DEFF Research Database (Denmark)

    Niemann, Hans Henrik

    2002-01-01

    Different aspects of fault detection and fault isolation in closed-loop systems are considered. It is shown that using the standard setup known from feedback control, it is possible to formulate fault diagnosis problems based on a performance index in this general standard setup. It is also shown...

  8. Efficient Matrices for Evaluating the Performance of IEEE 802.16 based Mesh Network at Node Level

    Directory of Open Access Journals (Sweden)

    Deepak kumar

    2014-12-01

    Full Text Available Wimax stands for World Wide Interoperatability for Microwave Access. This technology is based on the IEEE 802.16 standard (also called as Broad band Wireless Access. Wimax is a telecommunication technology that provides wireless transmission of data in different transmission modes from Point-to-Point, Point-to-Multipoint providing the 75 mb/s broadband speed without the need of cables. Different Routing Protocols have been used in wireless network. This paper presented an analysis on those routing protocols especially designed for wireless networks. A study and comparison on the performance of three routing protocols (AODV, DSR, and DSDV for Mobile WiMAX environment is done. The performance matrix includes Packet Delivery fraction (PDF, Throughput, End to End Delay, and number of packet dropped were identified. The study used OPNET 14 simulator for the comparison on the performance analysis. Successfully results found that AODV protocol outperform the DSR and DSDV.

  9. Performability evaluation of the SIFT computer

    Science.gov (United States)

    Meyer, J. F.; Furchtgott, D. G.; Wu, L. T.

    1979-01-01

    Performability modeling and evaluation techniques are applied to the SIFT computer as it might operate in the computational evironment of an air transport mission. User-visible performance of the total system (SIFT plus its environment) is modeled as a random variable taking values in a set of levels of accomplishment. These levels are defined in terms of four attributes of total system behavior: safety, no change in mission profile, no operational penalties, and no economic process whose states describe the internal structure of SIFT as well as relavant conditions of the environment. Base model state trajectories are related to accomplishment levels via a capability function which is formulated in terms of a 3-level model hierarchy. Performability evaluation algorithms are then applied to determine the performability of the total system for various choices of computer and environment parameter values. Numerical results of those evaluations are presented and, in conclusion, some implications of this effort are discussed.

  10. Hospital evacuation; planning, assessment, performance and evaluation

    Institute of Scientific and Technical Information of China (English)

    Wabo Nero C; Örtenwall P; Khorram-Manesh A

    2012-01-01

    Objective: Malfunction in hospitals´ complex internal systems, or extern threats, may result in a hospital evacuation. Factors contributing to such evacuation must be identified, analyzed and action plans should be prepared. Our aims in this study were 1) to evaluate the use of risk and vulnerability analysis as a basis for hospital evacuation plan, 2) to identify risks/hazards triggering an evacuation and evaluate the respond needed and 3) to propose a template with main key points for planning, performance and evaluation of such evacuation. Methods: A risk and vulnerability analysis at two county hospitals along with a systematic online literature search based on the following keywords; “evacuation/closure”, “hospitals/medical facilities” and“disaster/hazards” alone or with “planning”, was conducted. Results: We found that although all hospitals have a disaster plan, there is a lack of knowledge and appropriate instruments to plan, perform and evaluate a hospital evacuation. Risk and vulnerability analysis can be used to reveal threats leading to an evacuation (e.g. on-going climate changes and terror actions). These key points can later be used to plan, perform and evaluate such evacuation. Conclusion: There is a need for an elaborated evacuation planning for hospitals. An evacuation plan should continuously be drilled based on a risk and vulnerability analysis. A general guide can be used as foundation to plan, perform and evaluate such plan.

  11. Performance evaluation of shape memory alloy/rubber-based isolation systems for seismic response mitigation of bridges

    Science.gov (United States)

    Ozbulut, Osman E.; Hurlebaus, Stefan

    2010-04-01

    Base isolation is an effective method of reducing seismic response of bridges during an earthquake. Rubber isolators are one of the most common types of base isolation systems. As an alternative to conventional rubber isolators such as high damping rubber bearing and lead rubber bearing, smart rubber bearing systems with shape memory alloys (SMAs) have been proposed in recent years. As a class of smart materials, shape memory alloys shows excellent re-centering and considerable damping capabilities which can be exploited to obtain an efficient seismic isolation system. This paper explores effectiveness of shape memory alloy/rubber-based isolation systems for protecting bridges against seismic loads by performing a sensitivity analysis. The isolation system considered in this study consists of a laminated rubber bearing which provides lateral flexibility while supplying high vertical load-carrying capacity and an auxiliary device made of multiple loops SMA wires. The SMA device offers additional energy dissipating and re-centering capability. A threespan continuous bridge is modeled with SMA/rubber-based isolation system. Numerical simulations of the bridge are conducted for various historical ground motions that are spectrally matched to a target design spectrum. The normalized yield strength, yield displacement and pre-stress level of the SMA device and ambient temperature are selected as parameters of the sensitivity study. The variation of seismic response of the bridge with considered parameters is assessed. The optimum values of the normalized yield strength and the yield displacement of the SMA device is found to be in the range of 0.20-0.25 and 40-50 mm, respectively. Also, the SMA/rubber-based isolation system is observed to be more effective when the SMA device is pre-stressed. In addition, it is found that ambient temperature considerably affects the performance of the bridge isolated by SMA/rubber-based isolators.

  12. Erosion of wind turbine blade coatings - Design and analysis of jet-based laboratory equipment for performance evaluation

    DEFF Research Database (Denmark)

    Zhang, Shizhong; Dam-Johansen, Kim; Nørkjær, Sten

    2015-01-01

    of the blades in such equipment. To reduce expensive blade maintenance repairs and to avoid out-of-service periods, energy-absorbing blade coatings are required to protect rotor blades from rain erosion. In this work we describe the design, construction and evaluation of a laboratory setup for fast screening...... of up to 22 coating samples that is based on water jet slugs. Our objective is to study the effect of the parameters involved in the rain erosion process and to correlate our experimental results with data obtained with the complex and expensive whirling arm rig, which has become the industry standard...

  13. Design of a neutron-TPC prototype and its performance evaluation based on an alpha-particle test

    Science.gov (United States)

    Huang, Meng; Li, Yu-Lan; Niu, Li-Bo; Li, Jin; Deng, Zhi; He, Li; Zhang, Hong-Yan; Cheng, Xiao-Lei; Fu, Jian-Qiang; Li, Yuan-Jing

    2015-08-01

    A neutron-TPC (nTPC) is being developed for use as a fast neutron spectrometer in the fields of nuclear physics, nuclear reactor operation monitoring, and thermo-nuclear fusion plasma diagnostics. An nTPC prototype based on a GEM-TPC (Time Projection Chamber with Gas Electron Multiplier amplification) has been assembled and tested using argon-hydrocarbon mixture as the working gas. By measuring the energy deposition of the recoil proton in the sensitive volume and the angle of the proton track, the incident neutron energy can be deduced. A Monte Carlo simulation was carried out to analyze the parameters affecting the energy resolution of the nTPC, and gave an optimized resolution under ideal conditions. An alpha particle experiment was performed to verify its feasibility, and to characterize its performance, including energy resolution and spatial resolution. Based on the experimental measurement and analysis, the energy resolution (FWHM) of the nTPC prototype is predicted to be better than 3.2% for 5 MeV incident neutrons, meeting the performance requirement (FWHM<5%) for the nTPC prototype.

  14. Portfolio optimization and performance evaluation

    DEFF Research Database (Denmark)

    Juhl, Hans Jørn; Christensen, Michael

    2013-01-01

    Based on an exclusive business-to-business database comprising nearly 1,000 customers, the applicability of portfolio analysis is documented, and it is examined how such an optimization analysis can be used to explore the growth potential of a company. As opposed to any previous analyses, optimal...... customer portfolios are determined, and it is shown how marketing decision-makers can use this information in their marketing strategies to optimize the revenue growth of the company. Finally, our analysis is the first analysis which applies portfolio based methods to measure customer performance...

  15. Performance-based risk-sharing arrangements-good practices for design, implementation, and evaluation: report of the ISPOR good practices for performance-based risk-sharing arrangements task force.

    Science.gov (United States)

    Garrison, Louis P; Towse, Adrian; Briggs, Andrew; de Pouvourville, Gerard; Grueger, Jens; Mohr, Penny E; Severens, J L Hans; Siviero, Paolo; Sleeper, Miguel

    2013-01-01

    There is a significant and growing interest among both payers and producers of medical products for agreements that involve a "pay-for-performance" or "risk-sharing" element. These payment schemes-called "performance-based risk-sharing arrangements" (PBRSAs)-involve a plan by which the performance of the product is tracked in a defined patient population over a specified period of time and the amount or level of reimbursement is based on the health and cost outcomes achieved. There has always been considerable uncertainty at product launch about the ultimate real-world clinical and economic performance of new products, but this appears to have increased in recent years. PBRSAs represent one mechanism for reducing this uncertainty through greater investment in evidence collection while a technology is used within a health care system. The objective of this Task Force report was to set out the standards that should be applied to "good practices"-both research and operational-in the use of a PBRSA, encompassing questions around the desirability, design, implementation, and evaluation of such an arrangement. This report provides practical recommendations for the development and application of state-of-the-art methods to be used when considering, using, or reviewing PBRSAs. Key findings and recommendations include the following. Additional evidence collection is costly, and there are numerous barriers to establishing viable and cost-effective PBRSAs: negotiation, monitoring, and evaluation costs can be substantial. For good research practice in PBRSAs, it is critical to match the appropriate study and research design to the uncertainties being addressed. Good governance processes are also essential. The information generated as part of PBRSAs has public good aspects, bringing ethical and professional obligations, which need to be considered from a policy perspective. The societal desirability of a particular PBRSA is fundamentally an issue as to whether the cost of

  16. Spatiotemporal model evaluation across Europe: A methodology based on expert knowledge, multiple datasets, physiography, flow signatures and performance metrics

    Science.gov (United States)

    Donnelly, Chantal; Andersson, Jafet; Arheimer, Berit; Gustafsson, David; Hundecha, Yeshewatesfa; Pechlivanidis, Ilias

    2015-04-01

    The hydrological model E-HYPE is spatially distributed with an average subbasin size of 200 km2 for continental Europe. The third version of the model (E-HYPE v3.0) has recently been released, building on experience in setting up multi-basin models at the large scale using open data from readily available sources. A methodology adopting a stepwise calibration of the model is used to optimize model performance to multiple datasets including (a) satellite estimates of potential evapotranspiration and ice cover, (b) in situ snow depth measurements, and (c) 116++ discharge stations representing a variety of catchment sizes, hydro-climatologies, physiographies and anthropogenic influences across Europe. Furthermore, the model is evaluated against an independent validation set of 750 discharge stations. This assists on determining how well the model represents the spatiotemporal variation in flow signatures including low, mean and high flows, flashiness, coefficient of variation and various scales of temporal variation (daily, seasonal and interannual). Assuming that the stations sufficiently represent the variation in catchment scales, hydro-climatology and physiography across Europe, the spread in performance of the validation stations may be assumed to represent the uncertainty in predicting an ungauged basin. This assumption will be further explored. Model evaluation using a large database of discharge data has the added value of informing on spatial errors, which can then be related to erroneous/uncertain input data (e.g. presence of undercatch in gridded precipitation databases), insufficient processes descriptions (e.g. groundwater recharge for a region), and limited knowledge on anthropogenic processes (e.g. extractions, regulation). This has then fed back into development of improved input data sets for precipitation, improved model process descriptions for irrigation and regulation and a new model module for deep aquifer interchange. E-HYPEv3.0 performs well

  17. CUDA Based Performance Evaluation of the Computational Efficiency of the DCT Image Compression Technique on Both the CPU and GPU

    Directory of Open Access Journals (Sweden)

    Kgotlaetsile Mathews Modieginyane

    2013-06-01

    Full Text Available Recent advances in computing such as the massively parallel GPUs (Graphical Processing Units,coupledwith the need to store and deliver large quantities of digital data especially images, has brought a numberof challenges for Computer Scientists, the research community and other stakeholders. These challenges,such as prohibitively large costs to manipulate the digital data amongst others, have been the focus of theresearch community in recent years and has led to the investigation of image compression techniques thatcan achieve excellent results. One such technique is the Discrete Cosine Transform, which helps separatean image into parts of differing frequencies and has the advantage of excellent energy-compaction.This paper investigates the use of the Compute Unified Device Architecture (CUDA programming modelto implement the DCT based Cordic based Loeffler algorithm for efficient image compression. Thecomputational efficiency is analyzed and evaluated under both the CPU and GPU. The PSNR (Peak Signalto Noise Ratio is used to evaluate image reconstruction quality in this paper. The results are presentedand discussed.

  18. Performance evaluation of two types of heated cables for distributed temperature sensing-based measurement of soil moisture content

    Directory of Open Access Journals (Sweden)

    Dingfeng Cao

    2016-04-01

    Full Text Available Distributed temperature sensing (DTS using heated cables has been recently developed for distributed monitoring of in-situ soil moisture content. In this method, the thermal and electrical properties of heated cables have a significant influence on the measurement accuracy of soil moisture content. In this paper, the performances of two heated cables, i.e. the carbon-fiber heated cable (CFHC and the metal-net heated cable (MNHC, are studied in the laboratory. Their structures, uniformity in the axial direction, measurement accuracy and suitability are evaluated. The test results indicate that the MNHC has a better uniformity in the axial direction than CFHC. Both CFHC and MNHC have high measurement accuracy. The CFHC is more suitable for short-distance measurement (≤500 m, while the MNHC can be used for long-distance measurement (>500 m.

  19. Numerical and experimental evaluation of the impact performance of advanced high-strength steel sheets based on a damage model

    Science.gov (United States)

    Ma, Ning; Park, Taejoon; Kim, Dongun; Kim, Chongmin; Chung, Kwansoo

    2010-06-01

    The impact performance in a Charpy impact test was experimentally and numerically studied for the advanced high-strength steel sheets (AHSS) TWIP940 and TRIP590 as well as the high-strength grade known as 340R. To characterize the mechanical properties, uni-axial simple tension tests were conducted to determine the anisotropic properties and strain rate sensitivities of these materials. In particular, the high-speed strain-rate sensitivity of TRIP590 and 340R (rate sensitive) was also characterized to account for the high strain rates involved in the Charpy impact test. To evaluate fracture behavior in the Charpy impact test, a new damage model including a triaxiality-dependent fracture criterion and hardening behavior with stiffness deterioration was introduced. The model was calibrated via numerical simulations and experiments involving simple tension and V-notch tests. The new damage model along with the anisotropic yield function Hill 1948 was incorporated into the ABAQUS/Explicit FEM code, which performed reasonably well to predict the impact energy absorbed during the Charpy impact test.

  20. Evaluation of algal biofilms on indium tin oxide (ITO for use in biophotovoltaic platforms based on photosynthetic performance.

    Directory of Open Access Journals (Sweden)

    Fong-Lee Ng

    Full Text Available In photosynthesis, a very small amount of the solar energy absorbed is transformed into chemical energy, while the rest is wasted as heat and fluorescence. This excess energy can be harvested through biophotovoltaic platforms to generate electrical energy. In this study, algal biofilms formed on ITO anodes were investigated for use in the algal biophotovoltaic platforms. Sixteen algal strains, comprising local isolates and two diatoms obtained from the Culture Collection of Marine Phytoplankton (CCMP, USA, were screened and eight were selected based on the growth rate, biochemical composition and photosynthesis performance using suspension cultures. Differences in biofilm formation between the eight algal strains as well as their rapid light curve (RLC generated using a pulse amplitude modulation (PAM fluorometer, were examined. The RLC provides detailed information on the saturation characteristics of electron transport and overall photosynthetic performance of the algae. Four algal strains, belonging to the Cyanophyta (Cyanobacteria Synechococcus elongatus (UMACC 105, Spirulina platensis. (UMACC 159 and the Chlorophyta Chlorella vulgaris (UMACC 051, and Chlorella sp. (UMACC 313 were finally selected for investigation using biophotovoltaic platforms. Based on power output per Chl-a content, the algae can be ranked as follows: Synechococcus elongatus (UMACC 105 (6.38×10(-5 Wm(-2/µgChl-a>Chlorella vulgaris UMACC 051 (2.24×10(-5 Wm(-2/µgChl-a>Chlorella sp.(UMACC 313 (1.43×10(-5 Wm(-2/µgChl-a>Spirulina platensis (UMACC 159 (4.90×10(-6 Wm(-2/µgChl-a. Our study showed that local algal strains have potential for use in biophotovoltaic platforms due to their high photosynthetic performance, ability to produce biofilm and generation of electrical power.

  1. Evaluating Performance Portability of OpenACC

    Energy Technology Data Exchange (ETDEWEB)

    Sabne, Amit J [ORNL; Sakdhnagool, Putt [ORNL; Lee, Seyong [ORNL; Vetter, Jeffrey S [ORNL

    2015-01-01

    Accelerator-based heterogeneous computing is gaining momentum in High Performance Computing arena. However, the increased complexity of the accelerator architectures demands more generic, high-level programming models. OpenACC is one such attempt to tackle the problem. While the abstraction endowed by OpenACC offers productivity, it raises questions on its portability. This paper evaluates the performance portability obtained by OpenACC on twelve OpenACC programs on NVIDIA CUDA, AMD GCN, and Intel MIC architectures. We study the effects of various compiler optimizations and OpenACC program settings on these architectures to provide insights into the achieved performance portability.

  2. Subjective performance evaluations and employee careers

    DEFF Research Database (Denmark)

    Frederiksen, Anders; Lange, Fabian; Kriechell, Ben

    Firms commonly use supervisor evaluations to assess the performance of employees who work in complex environments. Doubts persist whether their subjective nature invalidates using these performance measures to learn about careers of individuals and to inform theory in personnel economics. We...... examine personnel data from six large companies and establish how subjective ratings, interpreted as ordinal rankings of employee performances within narrowly defined peer-groups, correlate with objective career outcomes. We find many similarities across firms in how subjective ratings correlate with base...

  3. Performance evaluation of an anaerobic/aerobic landfill-based digester using yard waste for energy and compost production.

    Science.gov (United States)

    Yazdani, Ramin; Barlaz, Morton A; Augenstein, Don; Kayhanian, Masoud; Tchobanoglous, George

    2012-05-01

    The objective of this study was to evaluate a new alternative for yard waste management by constructing, operating and monitoring a landfill-based two-stage batch digester (anaerobic/aerobic) with the recovery of energy and compost. The system was initially operated under anaerobic conditions for 366 days, after which the yard waste was aerated for an additional 191 days. Off gas generated from the aerobic stage was treated by biofilters. Net energy recovery was 84.3MWh, or 46kWh per million metric tons of wet waste (as received), and the biochemical methane potential of the treated waste decreased by 83% during the two-stage operation. The average removal efficiencies of volatile organic compounds and non-methane organic compounds in the biofilters were 96-99% and 68-99%, respectively.

  4. Evaluation of the shape memory performances of poly(ε-caprolactone)-based tubular devices for potential biomedical applications

    Science.gov (United States)

    Pandini, Stefano; Borboni, Alberto; Bodini, Ileana; Vetturi, David; Cambiaghi, Danilo; Paderni, Katia; Messori, Massimo; Toselli, Maurizio; Riccò, Theonis

    2014-05-01

    The shape memory behavior of tubular specimens based on crosslinked poly(ɛ-caprolactone) was investigated in order to evaluate their ability i) to restore their shape after being folded in a more compact one, and ii) to exert stress under external confinement (recovery stress). The specimens were prepared following different crosslinking methodologies and with different network densities, in order to tailor the material response in terms of transformation temperatures and recovery stress capabilities. The devices are able to fully recover their shape once heated close to the melting temperature and to exert moderate stresses, that may be controlled through thickness and crosslink density, and whose values were employed to develop a new testing apparatus for the measurement of radial dilation capabilities.

  5. Analytical Performance Evaluation of Different Switch Solutions

    Directory of Open Access Journals (Sweden)

    Francisco Sans

    2013-01-01

    Full Text Available The virtualization of the network access layer has opened new doors in how we perceive networks. With this virtualization of the network, it is possible to transform a regular PC with several network interface cards into a switch. PC-based switches are becoming an alternative to off-the-shelf switches, since they are cheaper. For this reason, it is important to evaluate the performance of PC-based switches. In this paper, we present a performance evaluation of two PC-based switches, using Open vSwitch and LiSA, and compare their performance with an off-the-shelf Cisco switch. The RTT, throughput, and fairness for UDP are measured for both Ethernet and Fast Ethernet technologies. From this research, we can conclude that the Cisco switch presents the best performance, and both PC-based switches have similar performance. Between Open vSwitch and LiSA, Open vSwitch represents a better choice since it has more features and is currently actively developed.

  6. Evaluation of the reproductive performance of rabbits does fed a half-simplified diet based on cassava byproducts

    Directory of Open Access Journals (Sweden)

    Andréia Fróes Galuci Oliveira

    2011-11-01

    Full Text Available A total of 70 five-month-old female New Zealand White rabbits were assigned in a completely randomized design, over three reproductive cycles, with two treatments: a reference diet and a half-simplified diet containing 79.83% cassava byproduct. The study evaluated body weight and feed intake of does, feed cost, number and total body weight of kits at kindling and weaning per female during three cycles, number and percentage of mortality/female/cycle, and weight gain of kits from birth to weaning. No interaction was observed between the diets and among the reproductive cycles for any evaluated characteristics. The body weight of does at the moment of weaning was similar in both groups for all three reproductive cycles. However, does fed the half-simplified diet had lower feed intake during the three reproductive cycles and, consequently, more reproductive flaws. The number of kits at weaning, body weight of kits at kindling and weaning, weight gain of kits from birth to weaning, and total body weight of kits at weaning were lower for the group of does fed the half-simplified diet and, consequently, there was a higher number and percentage of dead kits in this group. The total numbers of kits at kindling and weaning and total body weight of kits at birth during all three reproductive cycles were similar between the groups; however, total body weight of weaning rabbits was higher for the animals receiving the reference diet. It is possible to conclude that although the use of the half-simplified diet decreases the reproductive performance of does, it reduces feed cost per kg of body weight by 23.63% compared with the reference diet, proving to be a viable nutritional option for rabbit production.

  7. 48 CFR 2936.604 - Performance evaluation.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Performance evaluation... Performance evaluation. (a) The HCA must establish procedures to evaluate architect-engineer contractor... reports must be made using Standard Form 1421, Performance Evaluation (Architect-Engineer) as...

  8. 13 CFR 304.4 - Performance evaluations.

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Performance evaluations. 304.4... ECONOMIC DEVELOPMENT DISTRICTS § 304.4 Performance evaluations. (a) EDA shall evaluate the management... of at least one (1) other District Organization in the performance evaluation on a...

  9. Web-Based vs. Paper-Based Homework to Evaluate Students' Performance in Introductory Physics Courses and Students' Perceptions: Two Years Experience

    Science.gov (United States)

    Demirci, Neset

    2010-01-01

    The main aim of this study was to assess and compare undergraduate students' homework performance using a web-based testing system with paper-based, hand-graded one in introductory physics courses. Students' perceptions about each method were then investigated. Every semester during the two-year period, one of the two identical sections of…

  10. Evaluating the Performance of Absolute RSSI Positioning Algorithm-Based Microzoning and RFID in Construction Materials Tracking

    Directory of Open Access Journals (Sweden)

    M. Truijens

    2014-01-01

    Full Text Available High accuracy of construction materials tracking with radio frequency identification technology (RFID is challenging to achieve. The microzoning method consists essentially of an absolute received signal strength indication (RSSI positioning algorithm on the basis of measuring the distance of tag from antennas base. In this paper, we analyse and examine the effects of microzoning method on the performance of RFID tags. A system was set up whereby RFID tags and antennas with the microzoning method were developed and studied. The performance of the tag antennas was studied with the practical read-range measurements. The study results showed that this absolute algorithm worked reliably and was suitable for RFID applications requiring identification of positions of onsite materials and components. The results also showed that the algorithm achieved a large read range and high accuracy. The study investigates the RFID solutions for Australian LNG (liquefied natural gas industry and was initiated by the collaboration between Woodside Energy, Curtin University, and Industrial Automation Group Pty Ltd.

  11. The performance evaluation of a new neural network based traffic management scheme for a satellite communication network

    Science.gov (United States)

    Ansari, Nirwan; Liu, Dequan

    1991-01-01

    A neural-network-based traffic management scheme for a satellite communication network is described. The scheme consists of two levels of management. The front end of the scheme is a derivation of Kohonen's self-organization model to configure maps for the satellite communication network dynamically. The model consists of three stages. The first stage is the pattern recognition task, in which an exemplar map that best meets the current network requirements is selected. The second stage is the analysis of the discrepancy between the chosen exemplar map and the state of the network, and the adaptive modification of the chosen exemplar map to conform closely to the network requirement (input data pattern) by means of Kohonen's self-organization. On the basis of certain performance criteria, whether a new map is generated to replace the original chosen map is decided in the third stage. A state-dependent routing algorithm, which arranges the incoming call to some proper path, is used to make the network more efficient and to lower the call block rate. Simulation results demonstrate that the scheme, which combines self-organization and the state-dependent routing mechanism, provides better performance in terms of call block rate than schemes that only have either the self-organization mechanism or the routing mechanism.

  12. Security Analysis and Performance Evaluation of Enhanced Threshold Proxy Signature Scheme Based on RSA for Known Signers

    Directory of Open Access Journals (Sweden)

    Raman Kumar

    2012-08-01

    Full Text Available An efficient threshold signature scheme solves the difficulties of the receiver to proof the approval of the document from the sender as well as detecting if the file has been altered by illegitimate parties. In these days there are plenty of signature schemes such as (t,n threshold proxy signature scheme. The network is a shared medium so that the weakness security attacks such as eavesdropping, replay attack and modification attack. Thus, we have to establish a common key for encrypting/decrypting our communications over an insecure network. In this scheme, a (t,n threshold proxy signature scheme based on RSA, any t or more proxy signers can cooperatively generate a proxy signature while t-1 or fewer of them can’t do it. The threshold proxy signature scheme uses the RSA cryptosystem to generate the private and the public key of the signers. Comparison is done on the basis of time complexity, space complexity and communication overhead. We compare the performance of four schemes: Hwang et al., Wen et al., Geng et al. and Fengying et al. with the performance of a scheme that has been proposed by the authors of this article earlier. In the proposed scheme, both the combiner and the secret share holder can verify the correctness of the information that they are receiving from each other. Therefore, the enhanced threshold proxy signature scheme is secure and efficient against notorious conspiracy attacks.

  13. Isotherm Studies for Performance Evaluation of Functionalized Carbon Nanotubes (CNT Based Polymer Composite Nanofiltration Membranes for Desalination

    Directory of Open Access Journals (Sweden)

    D. Deepa

    2015-03-01

    Full Text Available Composite Nanofiltration membranes were fabricated by incorporating Carbon Nanotubes (CNT and Polyvinylidene Fluoride (PVDF membranes. A suspension was prepared by dispersing CNT (30 minutes of sonication in Dimethyl Sulfoxide (DMSO solvent for 0.5 mg/ml. This suspension after vacuum filtration dispersed over PVDF membrane of pore size 0.22µm. Excess DMSO was removed by washing using Ethanol followed by Deionized water. Normal and various functionalized (Hydroxyl (-OH, Carboxylic (-COOH, Amine (-NH2 SWCNTs and MWCNTs were purchased and the CNT based polymer composite nanofiltration membranes were fabricated by vacuum filtration method at a uniform loading of 10mg/cm2 . The experimental results were used to evaluate the TDS removal efficiency of the fabricated membrane modules, which are normal and functionalized (4 composites in both SW and MW combinations CNT. The TDS removal efficiency of all the 8 composite membranes were observed under varied operating conditions viz., varying flow rate (100,150,200 and 250 ml/hr and influent TDS (2500, 3000, 4000 and 5000 mg/l. The flux of the membrane is varied 200 to 500 lit/m2 .hr. The Isotherm studies using the experimental data on Langmuir and Freundlich isotherm models validated the results of the experiment and are indicative of the role of adsorption of the functionalized CNT based polymer composite nanofiltration membranes which removing the TDS. The results showed that the amino functionalized SWCNTs based polymer composite (PVDF/SWCNTs nanofiltration membranes can be used as an effective adsorbent for desalination due to their high adsorption capacity.

  14. Weighting Performance Evaluation Criteria Base in Balanced Score Card Approach with Use of Combination Method Shapley value & Bull\\'s-eye

    Directory of Open Access Journals (Sweden)

    Mohammad Hassan Kamfiroozi

    2014-05-01

    Full Text Available Performance evaluation as a control tool was considered by managers in the organizations and manufactures. In this paper we decide to present a new model for performance evaluation and industrial companies ranking at uncertain conditions. Based on this, we implemented performance evaluation based on balance score card (BSC method. Beside, we tried to use three parameter interval grey numbers in lieu of linguistic variables. Then evaluation and weighting of fourth indicators is done with use of Bulls-eye-Shapley combination method that is counted as new approach in this article. Reason of utilization of three parameter interval grey numbers and combination method was decreasing of environmental uncertainty on data and model. This combination weighting method can be used as a new method in decision making Science. At final of this paper case study was implemented on industrial companies (nail makers that ranking of these companies is obtained by use of grey-TOPSIS method (that is a generalization of classic TOPSIS for three parameter interval grey numbers.

  15. 48 CFR 236.604 - Performance evaluation.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Performance evaluation... Architect-Engineer Services 236.604 Performance evaluation. (a) Preparation of performance reports. Use DD Form 2631, Performance Evaluation (Architect-Engineer), instead of SF 1421. (2) Prepare a...

  16. 一种基于VAHP—OWA的高校辅导员评价方法%A College Counselor Performance Evaluation Method Based on VAHP- OWA

    Institute of Scientific and Technical Information of China (English)

    李永刚

    2012-01-01

    Counselors are the backbone of ideological and political education in colleges and universities. The college counselor routine performance evaluation to reflect their work performance is an important job to keep their stable development. The paper builds a counselor performance evaluation system under the development concepts which including quality indictors, duties indictors, achievements e valuating indicators, and presents a new method based on VAHP - OWA to evaluate this system. Our case study has shown that the VAHP- OWA method is easily understood and operable, which makes it a practical and effective approach for the college counselor routine performance evaluation.%辅导员是高校学生工作中的骨干力量,对辅导员的工作进行常规化评价,以反映辅导员的工作状况和绩效,是辅导员队伍稳定发展的一项重要工作内容。以发展的观念建构包括素质指标体系、职责指标体系和绩效评价指标体系在内的辅导员发展性评价指标体系,同时提出一种基于VAHP—OWA的高校辅导员评价方法,实例证明该方法简单易懂,操作性强。

  17. A multiple-image-based method to evaluate the performance of deformable image registration in the pelvis

    Science.gov (United States)

    Saleh, Ziad; Thor, Maria; Apte, Aditya P.; Sharp, Gregory; Tang, Xiaoli; Veeraraghavan, Harini; Muren, Ludvig; Deasy, Joseph

    2016-08-01

    Deformable image registration (DIR) is essential for adaptive radiotherapy (RT) for tumor sites subject to motion, changes in tumor volume, as well as changes in patient normal anatomy due to weight loss. Several methods have been published to evaluate DIR-related uncertainties but they are not widely adopted. The aim of this study was, therefore, to evaluate intra-patient DIR for two highly deformable organs—the bladder and the rectum—in prostate cancer RT using a quantitative metric based on multiple image registration, the distance discordance metric (DDM). Voxel-by-voxel DIR uncertainties of the bladder and rectum were evaluated using DDM on weekly CT scans of 38 subjects previously treated with RT for prostate cancer (six scans/subject). The DDM was obtained from group-wise B-spline registration of each patient’s collection of repeat CT scans. For each structure, registration uncertainties were derived from DDM-related metrics. In addition, five other quantitative measures, including inverse consistency error (ICE), transitivity error (TE), Dice similarity (DSC) and volume ratios between corresponding structures from pre- and post- registered images were computed and compared with the DDM. The DDM varied across subjects and structures; DDMmean of the bladder ranged from 2 to 13 mm and from 1 to 11 mm for the rectum. There was a high correlation between DDMmean of the bladder and the rectum (Pearson’s correlation coefficient, R p  =  0.62). The correlation between DDMmean and the volume ratios post-DIR was stronger (R p  =  0.51 0.68) than the correlation with the TE (bladder: R p  =  0.46 rectum: R p  =  0.47), or the ICE (bladder: R p  =  0.34 rectum: R p  =  0.37). There was a negative correlation between DSC and DDMmean of both the bladder (R p  =  -0.23) and the rectum (R p  =  -0.63). The DDM uncertainty metric indicated considerable DIR variability across subjects and structures

  18. Fabrication and performance evaluation of a metal-based bimorph piezoelectric MEMS generator for vibration energy harvesting

    Science.gov (United States)

    Kuo, Chun-Liang; Lin, Shun-Chiu; Wu, Wen-Jong

    2016-10-01

    This paper presents the development of a bimorph microelectromechanical system (MEMS) generator for vibration energy harvesting. The bimorph generator is in cantilever beam structure formed by laminating two lead zirconate titanate thick-film layers on both sides of a stainless steel substrate. Aiming to scavenge vibration energy efficiently from the environment and transform into useful electrical energy, the two piezoelectric layers on the device can be poled for serial and parallel connections to enhance the output voltage or output current respectively. In addition, a tungsten proof mass is bonded at the tip of the device to adjust the resonance frequency. The experimental result shows superior performance the generator. At the 0.5 g base excitation acceleration level, the devices pooled for serial connection and the device poled for parallel connection possess an open-circuit output voltage of 11.6 VP-P and 20.1 VP-P, respectively. The device poled for parallel connection reaches a maximum power output of 423 μW and an output voltage of 15.2 VP-P at an excitation frequency of 143.4 Hz and an externally applied based excitation acceleration of 1.5 g, whereas the device poled serial connection achieves a maximum power output of 413 μW and an output voltage of 33.0 VP-P at an excitation frequency of 140.8 Hz and an externally applied base excitation acceleration of 1.5 g. To demonstrate the feasibility of the MEMS generator for real applications, we finished the demonstration of a self-powered Bluetooth low energy wireless temperature sensor sending readings to a smartphone with only the power from the MEMS generator harvesting from vibration.

  19. Performance evaluation of two personal bioaerosol samplers.

    Science.gov (United States)

    Tolchinsky, Alexander D; Sigaev, Vladimir I; Varfolomeev, Alexander N; Uspenskaya, Svetlana N; Cheng, Yung S; Su, Wei-Chung

    2011-01-01

    In this study, the performance of two newly developed personal bioaerosol samplers for monitoring the level of environmental and occupational airborne microorganisms was evaluated. These new personal bioaerosol samplers were designed based on a swirling cyclone with recirculating liquid film. The performance evaluation included collection efficiency tests using inert aerosols, the bioaerosol survival test using viable airborne microorganism, and the evaluation of using non-aqueous collection liquid for long-period sampling. The test results showed that these two newly developed personal bioaerosol samplers are capable of doing high efficiency, aerosol sampling (the cutoff diameters are around 0.7 μm for both samplers), and have proven to provide acceptable survival for the collected bioaerosols. By using an appropriate non-aqueous collection liquid, these two personal bioaerosol samplers should be able to permit continuous, long-period bioaerosol sampling with considerable viability for the captured bioaerosols.

  20. 40 CFR 63.5850 - How do I conduct performance tests, performance evaluations, and design evaluations?

    Science.gov (United States)

    2010-07-01

    ... test, performance evaluation, and design evaluation in 40 CFR part 63, subpart SS, that applies to you..., performance evaluations, and design evaluations? 63.5850 Section 63.5850 Protection of Environment... conduct performance tests, performance evaluations, and design evaluations? (a) If you are using any...

  1. Performance Evaluation of Tree Object Matching

    DEFF Research Database (Denmark)

    Somchaipeng, Kerawit; Sporring, Jon; Kreiborg, Sven

    2005-01-01

    Multi-Scale Singularity Trees (MSSTs) represents the deep structure of images in scale-space and provide both the connections between image features at different scales and their strengths. In this report we present and evaluate an algorithm that exploits the MSSTs for image matching. Two version...... database. Finally the performance is compared with algorithms based on the Scale Invariant Feature Transform (SIFT), and the Position of Catastrophes (CAT)....

  2. Contribution analysis as an evaluation strategy in the context of a sector-wide approach: Performance-based health financing in Rwanda

    Directory of Open Access Journals (Sweden)

    Martin Noltze

    2014-12-01

    Full Text Available Sector-wide approaches (SWAps emerged as a response to donor fragmentation and non-adjusted and parallel programming. In the health sector, SWAps have received considerable support by the international donor community due to their potential to reduce inefficiencies through alignment to common procedures and hence to increase development effectiveness. Evaluating development cooperation in the context of a SWAp, however, translates into methodological challenges for evaluators who have to disentangle the cumulative effects in strongly donor-aligned, complex sector environments. In this article the authors discussed the application of a methodological strategy for evaluating development interventions in complex settings – for example in the context of a SWAp –and reflected the suitability of the approach. The authors conducted a contribution analysis, a theory-based approach to evaluation, and exemplified the approach for an intervention of performance-based financing for Rwandan health workers supported by the Rwanda-German cooperation. The findings suggested that the Rwandan system of performance based financing increased service orientation and outputs of health professionals, but also indicated that negative motivational side effects and resource constraints are real. With regard to the methodological approach, the authors conclude that contribution analysis has a high potential to evaluate development cooperation in the context of a SWAp dueto its high flexibility to use different data collection tools and its capability to assess risks and rival explanations. Challenges can be identified with regard to the efficiency of the evaluation strategy and a remaining trade-off between scope and causal strength ofevidence.

  3. The Development of a Scientific Evaluation System of Force-on-Force (FOF) Exercise for Performance-based Regulation in Nuclear Security

    Energy Technology Data Exchange (ETDEWEB)

    Koh, Moonsung; Jung, Myungtak [Korea Institute of Nuclear Nonproliferation and Control, Daejeon (Korea, Republic of)

    2015-05-15

    A terrorist attack or sabotage at a nuclear facility could lead result in a great amount of loss of life and social chaos, in addition to serious radiological damage. As threats have been evolved more intelligent, divergent, advanced, the international societies including IAEA encourage for all member states to establish the performance-based regulation using Forceon- Force (FOF) exercise, computer simulation. Consequently, the performance evaluation for physical protection at nuclear facilities should focus on properly reacting to threat scenarios. Physical protection should also include detecting, blocking, delaying, interrupting including the human and technical factors the adversary having malicious intention of the realistic main threat element before he accomplishes the goal based on Design Basis Threat (DBT). After the completion of the FOF evaluation system, KINAC will evaluate, and later strengthen its overall security program in response to changes in the threat environment, technological advancements, and lessons learned. As a result, substantial improvements to a nuclear facility security can be predicted. These improvements will focus on a plant security force, physical barriers, intrusion detection systems, surveillance systems, and access controls. Through the building a Force-on-Force scientific evaluation system, KINAC will establish an efficient physical protection implementation system for nuclear energy facilities.

  4. Evaluation of gardenia yellow using crocetin from alkaline hydrolysis based on ultra high performance liquid chromatography and high-speed countercurrent chromatography.

    Science.gov (United States)

    Inoue, Koichi; Tanada, Chihiro; Nishikawa, Hiroaki; Matsuda, Satoru; Tada, Atsuko; Ito, Yusai; Min, Jun Zhe; Todoroki, Kenichiro; Sugimoto, Naoki; Toyo'oka, Toshimasa; Akiyama, Hiroshi

    2014-12-01

    Gardenia yellow is globally the most valuable spice and food color. It is generally a mixture of water-soluble carotenoid glycosyl esters which consist of crocetin bis(gentiobiosyl) ester as the main component. Crocetin is a natural carotenoid dicarboxylic acid that may be a candidate drug for pharmaceutical development, however, it is either present in trace amounts or is absent in natural gardenia yellow products. We here propose that crocetin produced by alkaline hydrolysis can be used to qualitatively evaluate gardenia yellow products using an ultra high performance liquid chromatographic assay. A useful and efficient isolation technique for isolating high-purity crocetin from gardenia yellow using high-speed countercurrent chromatography is described. High-speed countercurrent chromatographic fractionation followed by an ultra high performance liquid chromatographic assay showed that trans-crocetin is easily converted to about 15% cis-crocetin (85% trans-crocetin). Crocetin in gardenia yellow was quantitatively evaluated. Our approach is based on the hydrolysis process for converting crocetin glycosyl esters to crocetin before evaluation and isolation using the ultra high performance liquid chromatographic and high-speed countercurrent chromatographic methods. The combination of hydrolysis and chromatographic methods allows evaluation of the purity and quantity of crocetin in gardenia yellow.

  5. 48 CFR 36.604 - Performance evaluation.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Performance evaluation. 36.604 Section 36.604 Federal Acquisition Regulations System FEDERAL ACQUISITION REGULATION SPECIAL... Performance evaluation. See 42.1502(f) for the requirements for preparing past performance evaluations...

  6. [The methodological assessment and qualitative evaluation of psychometric performance tests based on the example of modern tests that assess reading and spelling skills].

    Science.gov (United States)

    Galuschka, Katharina; Rothe, Josefine; Schulte-Körne, Gerd

    2015-09-01

    This article looks at a means of objectively evaluating the quality of psychometric tests. This approach enables users to evaluate psychometric tests based on their methodological characteristics, in order to decide which instrument should be used. Reading and spelling assessment tools serve as examples. The paper also provides a review of German psychometric tests for the assessment of reading and spelling skills. This method facilitates the identification of psychometric tests.of high methodological quality which can be used for the assessment of reading and spelling skills. Reading performance should ideally be assessed with the following instruments: ELFE 1-6, LGVT 6-12, LESEN 6-7, LESEN 8-9, or WLLP-R. The tests to be used for the evaluation of spelling skills are DERET 1-2+, DERET 3-4+, WRT 1+, WRT 2+, WRT 3+, WRT 4+ or HSP 1-10.

  7. 40 CFR 63.2354 - What performance tests, design evaluations, and performance evaluations must I conduct?

    Science.gov (United States)

    2010-07-01

    ... evaluations, and performance evaluations must I conduct? 63.2354 Section 63.2354 Protection of Environment... tests, design evaluations, and performance evaluations must I conduct? (a)(1) For each performance test... procedures specified in subpart SS of this part. (3) For each performance evaluation of a continuous...

  8. An Evaluation of the Evidence Base for Performance Feedback to Improve Teacher Praise Using CEC's Quality Indicators

    Science.gov (United States)

    Sweigart, Chris A.; Collins, Lauren W.; Evanovich, Lauren L.; Cook, Sara Cothren

    2016-01-01

    Despite a rich body of empirical evidence that supports the use of teacher praise to improve student outcomes, it continues to be underused in practice. One method of ameliorating this problem is the use of performance feedback. Although some studies have indicated that the use of performance feedback is an effective approach for increasing…

  9. Performance evaluation of multi-stratum resources optimization with network functions virtualization for cloud-based radio over optical fiber networks.

    Science.gov (United States)

    Yang, Hui; He, Yongqi; Zhang, Jie; Ji, Yuefeng; Bai, Wei; Lee, Young

    2016-04-18

    Cloud radio access network (C-RAN) has become a promising scenario to accommodate high-performance services with ubiquitous user coverage and real-time cloud computing using cloud BBUs. In our previous work, we implemented cross stratum optimization of optical network and application stratums resources that allows to accommodate the services in optical networks. In view of this, this study extends to consider the multiple dimensional resources optimization of radio, optical and BBU processing in 5G age. We propose a novel multi-stratum resources optimization (MSRO) architecture with network functions virtualization for cloud-based radio over optical fiber networks (C-RoFN) using software defined control. A global evaluation scheme (GES) for MSRO in C-RoFN is introduced based on the proposed architecture. The MSRO can enhance the responsiveness to dynamic end-to-end user demands and globally optimize radio frequency, optical and BBU resources effectively to maximize radio coverage. The efficiency and feasibility of the proposed architecture are experimentally demonstrated on OpenFlow-based enhanced SDN testbed. The performance of GES under heavy traffic load scenario is also quantitatively evaluated based on MSRO architecture in terms of resource occupation rate and path provisioning latency, compared with other provisioning scheme.

  10. Autonomous Navigation Performance Evaluation Method Based on Trajectory Analysis%基于轨迹分析的自主导航性能评估方法

    Institute of Scientific and Technical Information of China (English)

    王勇鑫; 钱徽; 金卓军; 朱淼良

    2011-01-01

    在马尔可夫决策模型框架下,提出一种基于轨迹分析的计算评估方法,通过分析驾驶回报设置和车辆轨迹的特征期望衡量自主导航系统的性能.假定回报函数是回报特征的线性组合,通过逼近不同的车辆自主驾驶策略,求解应用于沙盒场景的回报设置,从而仿真导航轨迹的特征期望.实验结果表明,该方法能对自主导航系统的轨迹数据实现定性和定量评估.%This paper proposes a novel trajectory-analysis-based performance evaluation method, which assesses and compares the navigation performances by reward settings and feature expectations under Markov Decision Process(MDP) framework. Assuming that the reward function is a linear combination of known features, this method evaluates reward settings by approximating the driving styles of different land autonomous navigation systems. On this basis, reward settings are used to simulate the feature expectations of navigation trajectories in a standard land navigation environment called the sandbox. Experimental results show the validity of this method in both qualitative and quantitative performance evaluations.

  11. 基于KPI的公共图书馆绩效考核初探%Public Libraries Performance Evaluation Study Based on KPI

    Institute of Scientific and Technical Information of China (English)

    林金瑞

    2014-01-01

    绩效考核是对组织成员绩效周期内的工作业绩进行考核与评定,是绩效管理的核心环节,它不仅关系到组织整体绩效管理系统运行的效果,还与成员的利益密切相关。本文主要运用KPI绩效考核的理论和方法来对公共图书馆员工绩效考核问题进行探讨,构建基于KPI的公共图书馆绩效考核体系。%Performance appraisal is the evaluation on the members' work achievement in the period. It's the core link in the performance management, which not only concerns the whole work effect of the performance management system, but also has relation with the members' interest. I will mainly use the theory of performance appraisal based on KPI to investigate the public librarians. I will build the counselor's performance appraisal system of the public li-brary based on KPI.

  12. Theory and Practice on Teacher Performance Evaluation

    Institute of Scientific and Technical Information of China (English)

    Cai Yonghong; Lin Chongde

    2006-01-01

    Tcacher performance evaluation plays a key role in educational personnel reform.so it has been an important yet difficult issue in educational reform.Previous evaluations on teachers failed to make strict distinction among the three dominant types of evaluation,namely,capability,achievement.and effectiveness.Moreover,teacher performance evaluation was usually restricted to task performance,neglecting contextual performance.Most researches done in teachers'evaluation were only about college teachers.This Paper suggests that teacher performance evaluation should find its theoretical foundation in teacher performance constructs.After making literature review,critical case study,critical interview,and qualitative research,the authors propose a new construct of teacher performance and make necessary analysis for the construct of reliability and validity in empirical approaches.

  13. Performance Evaluation of a SOA-based Rack-To-Rack Switch for Optical Interconnects Exploiting NRZ-DPSK

    DEFF Research Database (Denmark)

    Karinou, Fotini; Borkowski, Robert; Prince, Kamau;

    2012-01-01

    We experimentally study the transmission performance of 10-Gb/s NRZ-DPSK through concatenated AWG MUX/DMUXs and SOAs employed in an optimized 64×64 optical supercomputer interconnect architecture. NRZ-DPSK offers 9-dB higher dynamic range compared to conventional IM/DD....

  14. Robotic Manipulator Control Performance Evaluation.

    Science.gov (United States)

    1986-08-01

    torque technique produces a control law analogous to the mathematically based exact linearization 1951, nonlinear feedback [201, and optimal control...law analogous to the mathematically based exact linearization [951, nonlinear feedback [201, and optimal control methods [651. Therefore the results...control law analogous to the mathematically based exact linearization [951, nonlinear feedback [201, and optimal control methods [65]. Knowledge about

  15. Medicare Administrative Contractor Performance Evaluation

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Centers for Medicare and Medicaid Services (CMS) has compiled a summary of overall Medicare Administrative Contractor (MAC) performance information as measured...

  16. Performance Evaluation of Image Fusion Algorithms for Underwater Images-A study based on PCA and DWT

    Directory of Open Access Journals (Sweden)

    Ansar MK

    2014-11-01

    Full Text Available In this paper, a comparative study between two image fusion algorithm based on PCA and DWT is carried out in underwater image domain. Underwater image fusion is emerged as one of the main image fusion area, here two or more images will be fused by retaining the most desirable characteristics of each underwater images. The DWT technique is used to decompose the input image into four frequency sub bands and the low-low sub band images will be considered in fusion processing. In PCA method significant eigen values will be considered in fusion process to retain the important characteristics of the input images. The results acquired from both experiments are tabulated and compared by considering the statistical measures such as Peak Signal to Noise Ratio (PSNR, Mean Square Error (MSE and Entropy. Results shows that underwater image fusion based on DWT outperforms the PCA based method.

  17. Applying distance-to-target weighing methodology to evaluate the environmental performance of bio-based energy, fuels, and materials

    NARCIS (Netherlands)

    Weiss, M.; Patel, M.K.; Heilmeier, H.; Bringezu, S.

    2007-01-01

    The enhanced use of biomass for the production of energy, fuels, and materials is one of the key strategies towards sustainable production and consumption. Various life cycle assessment (LCA) studies demonstrate the great potential of bio-based products to reduce both the consumption of non-renewabl

  18. IMU navigation performance evaluation method based on signal grafting technology%基于信号嫁接技术的IMU导航性能评估方法

    Institute of Scientific and Technical Information of China (English)

    高琳; 班亚龙; 牛小骥

    2015-01-01

    为了探究新型惯性测量单元( IMU)的导航定位精度以便选用,需要对其进行方便有效和低成本的测试评估。对一种新颖的基于信号嫁接技术的IMU导航性能评估方法进行了验证和分析。以三种中低精度IMU为样本,将该方法的评估结果与该IMU的现场测试结果对比,从而对该方法的评估效果进行验证。结果表明:相对于IMU的仿真评估,使用信号嫁接技术合成出的IMU数据在导航性能上与现场测试结果有更高的一致性,更为有效和可信。该方法相比于权威的现场测试评估具有成本低、效率高的独特优势,在中低精度惯性器件性能评估上具有很高的应用价值。%In order to evaluate navigation performance of inertial measurement unit( IMU),convenient,efficient and low-cost evaluation methods are needed. A new method based on signal grafting is verified and analyzed,to evaluate the navigation performance of IMU. Three kinds of medium and low precision IMUs are used as samples, to check the evaluation effectiveness of the proposed method,the evaluation results using this method are compared with their actual road test results. Experimental results show that the navigation performances of the grafted IMU data matched much better with that of the real IMU data compared with the simulation IMU data. The proposed signal grafting method is not only reliable and feasible,but also low-cost and efficient,therefore,it has high application value in IMU performance evaluation of medium and low precision.

  19. Performance evaluation of computer and communication systems

    CERN Document Server

    Le Boudec, Jean-Yves

    2011-01-01

    … written by a scientist successful in performance evaluation, it is based on his experience and provides many ideas not only to laymen entering the field, but also to practitioners looking for inspiration. The work can be read systematically as a textbook on how to model and test the derived hypotheses on the basis of simulations. Also, separate parts can be studied, as the chapters are self-contained. … the book can be successfully used either for self-study or as a supplementary book for a lecture. I believe that different types of readers will like it: practicing engineers and resea

  20. Evaluation on Construction Enterprises’ KPI Safety Performance Based on SEM%基于SEM的建筑施工企业KPI安全绩效评价

    Institute of Scientific and Technical Information of China (English)

    刘霁; 李云; 刘浪

    2011-01-01

    Considering the importance of production safety, service quality management, overall quality of employees and work efficiency of construction enterprises, the safety production factors of construction enterprises are discussed, and the safety performance of construction enterprises is evaluated comprehensively and objectively. The safety performance evaluation index system of construction enterprises is established by the KPI established based on the four dimensions of human factors, management systems, construction equipment and environmental conditions. The theory of structural equation model is introduced to the evaluation system, and the SEM of safety performance is established. The general procedure of the e-valuation method is summarized, and an applied example of quantitatively evaluating the safety performance of a certain construction enterprise is given. The results show that the factors influencing safety performance of the construction enterprise are man, management system, environmental condition and construction equipment in order according to their influencing importance degree.%鉴于建筑施工企业生产安全和服务质量管理以及企业员工综合素质和工作效率的重要性,探讨影响建筑施工企业安全生产的因素,并对建筑施工企业的安全绩效进行全面、客观的评价.采用关键绩效指标(KPI)建立基于人的因素、管理制度、施工设备和环境条件四维度的建筑施工企业安全绩效评价指标体系,研究将结构方程模型理论引入到评价体系中,构建安全绩效评价的结构方程模型(SEM).总结评价的一般程序,并结合实例,从定量的角度对某建筑施工企业安全绩效进行评价.结果表明,KPI评价体系和SEM评价模型评估得出建筑企业安全绩效影响因素的程度是:人的因素>管理制度>环境条件>施工设备.

  1. Software Project Performance Evaluation Based on Fuzzy Neural Network%基于FNN的软件项目绩效评价模型研究

    Institute of Scientific and Technical Information of China (English)

    于本海; 张金隆; 吴恒亮; 郑丽伟

    2011-01-01

    从分析软件项目绩效评价指标体系不完善、评价方法不规范和模型考虑因素过于单一入手,应用统计分析理论建立软件组织状态、软件项目自身特征的指标体系;以文献研究的方式,界定软件项目绩效的内涵;提出了一种新的网络拓扑结构设计方法,建立了基于模糊神经网络的软件项目绩效评价模型;引入改进粒子群学习算法,准确高效地解决了评价模型连接权系数的确定问题.实证研究表明,该模型能够有效地评价软件项目绩效和识别项目风险因素,对软件组织制定风险规避策略、改善项目绩效水平、提供了决策支持信息.%From the analysis of software project performance evaluation indicator system, owing to its incompleteness, excessive simple evaluation model, and informal approach, using the statistic a-nalysis theory, an indicator system about software organizations status and software projects characteristics is given. The connotation of software project performance is defined through literature research. Then, the author develops a software project performance evaluation model based on Fuzzy Neural Network using a new network topology structure, which precisely and efficiently resolves the problem of evaluation model' s connection right weights. The empirical research indicates that the model may effectively evaluate the software project performance and cognize project risk factors, provide risk avoiding measures, better project performance, and give decision-making support information.

  2. The Performance Evaluation of Green Supply Chain Based on Evidential Reasoning%基于证据理论的绿色供应链绩效评价

    Institute of Scientific and Technical Information of China (English)

    宋巧娜

    2011-01-01

    从业务流程、经济效益、绿色环保和客户服务4个方面分析了评价绿色供应链绩效应考虑的主要因素.建立了绿色供应链绩效评价指标体系,并进一步给出基于证据理论的绿色供应链绩效评价的模型和算法.最后通过实例分析,说明了该方法的有效性和实用性.%The main factors what should be considered when evaluating green supply chain are analyzed in term of business process, economic benefit, environmental protection and customer service in this paper. The index system of performance evaluation for green supply chain is established, further, an arithmetic and model of the performance evaluation in green supply chain assessment based on evidential reasoning also have been developed. Finally, an example shows that the method is effective and practical.

  3. 基于AHP与云模型的软件过程绩效评价方法%Software process performance evaluation based on AHP and cloud model

    Institute of Scientific and Technical Information of China (English)

    刘东飞

    2013-01-01

    To make software quality better and improvement the organization software process capability, software process performance evaluation based on AHP and cloud model is proposed. Under the premise of the analysis of organization process goal, process-sub process-measure items mapping is established. Through the collection of organization historical data, based on project measurement and product measurement, the process baseline is constructed. The AHP method determines the weight value of the various levels relative to the goal quantitatively. Based on the value, to analyze project measurement and product measurement, the cloud model is presented to evaluate process performance qualitatively, continuous improvement software process capability quantitatively. Finally, a practical application example is given out to prove the feasibility of the evaluation method.%为改进软件质量和提高组织软件过程能力,提出了一种基于AHP与云模型的软件过程绩效评价方法.在对组织过程目标分析的前提下,建立起过程-子过程-度量项的映射关系.通过采集组织的历史数据,以项目测量和产品测量为基础,建立过程基线,运用AHP方法定量的确定出各层次对目标的权重值.基于此,结合云模型分析项目测量和产品测量数据,对过程绩效进行定性评价,持续性量化的改进软件过程能力.同时还给出了该方法的实际应用,应用结果表明了该评价方法的可行性.

  4. Performance Evaluation of Engineering Project Risk Based on Factor Analysis%基于因子分析对工程项目风险评价

    Institute of Scientific and Technical Information of China (English)

    崔楷

    2012-01-01

    Based on factor analysis of multivariate statistical analysis, aim directly at engineering project management practice, establishment the index system of engineering project performance evaluation, and use the SPSS software make a factor analysis of the data of engineering project, the final order factor score make evaluation value of the engineering project performance. This article studies the performance of engineering project risk provides a reasonable, practical feasibility of approach.%针对工程项目管理的实际,以多元统计分析中的因子分析为基础,建立了工程项目风险的评价指标体系,运用SPSS软件,对工程项目管理的数据进行因子分析,最后以因子得分作为工程项目风险的综合评价值,得出影响工程项目风险的重要因素,从而抓住重要因素,提高效率.

  5. Applying distance-to-target weighing methodology to evaluate the environmental performance of bio-based energy, fuels, and materials

    OpenAIRE

    Weiss, M.; Patel, M.K.; H. Heilmeier; Bringezu, S.

    2007-01-01

    The enhanced use of biomass for the production of energy, fuels, and materials is one of the key strategies towards sustainable production and consumption. Various life cycle assessment (LCA) studies demonstrate the great potential of bio-based products to reduce both the consumption of non-renewable energy resources and greenhouse gas emissions. However, the production of biomass requires agricultural land and is often associated with adverse environmental effects such as eutrophication of s...

  6. Performance evaluation of biogas burners

    Energy Technology Data Exchange (ETDEWEB)

    Chandra, A.; Tiwari, G.N.; Srivastava, V.K.; Yadav, Y.P. (Indian Inst. of Tech., New Delhi (India). Centre of Energy Studies)

    1991-01-01

    The results of testing some biogas burners of various brands are presented. A wide variation is found in their performance under similar conditions of testing. Parametric investigations have also been carried out on a typical biogas burner. These investigations reveal that the burner efficiency is a strong function of biogas flow pressure, pan-size and its position over the burner head. (author).

  7. Metrics for Offline Evaluation of Prognostic Performance

    Data.gov (United States)

    National Aeronautics and Space Administration — Prognostic performance evaluation has gained significant attention in the past few years.*Currently, prognostics concepts lack standard definitions and suffer from...

  8. Synthesis of some novel non ionic surfactants based on tolyltriazole and evaluation their performance as corrosion inhibitors for carbon steel

    Directory of Open Access Journals (Sweden)

    M.A. Migahed

    2013-06-01

    Full Text Available Five new synthesized non ionic surfactants (I–V were synthesized and characterized using FTIR and NMR spectroscopic methods. Performance of the synthesized compounds as corrosion inhibitors for X- 65 type carbon steel in oil wells formation water was investigated by various techniques such as weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS. It was found that the percentage inhibition efficiency (η% increases by increasing the inhibitor concentration until the critical micelle concentration (CMC is reached. Also, the results showed enhancement in inhibition efficiencies with increasing both molecular size of the surfactant and the degree of ethoxylation. Potentiodynamic polarization curves indicated that the inhibitors under investigation act as mixed type. The data obtained from electrochemical impedance spectroscopy (EIS were analyzed to model the corrosion inhibition process through equivalent circuit. Finally, the nature of the protective film formed on carbon steel surface was analyzed by SEM and EDX techniques.

  9. 基于BSC的企业知识管理绩效评价模型及评价方法研究%Study on Performance Evaluation Model and Evaluation Method of Enterprise Knowledge Management Based on Balanced Score Card

    Institute of Scientific and Technical Information of China (English)

    张瑞红

    2011-01-01

    This article analyzes the relationship between balanced score card and knowledge management performance evaluation , and constructs the fuzzy comprehensive evaluation model of the performance evaluation indicators system based on balanced score card by analytic hierarchy process. Finally, the paper uses the model to evaluate the knowledge management performance by AHP - FCE. A quantifiable scientific evaluation method is provided.%分析出平衡计分卡和知识管理绩效评价的关系,应用层次分析法从平衡计分卡角度构建了知识管理绩效评价指标体系的三层模糊综合评价模型,结合该模型运用AHP-FCE方法对知识管理绩效进行评价,为知识管理绩效评价提供了可量化的科学评价方法.

  10. Performance evaluation of object based greenhouse detection from Sentinel-2 MSI and Landsat 8 OLI data: A case study from Almería (Spain)

    Science.gov (United States)

    Novelli, Antonio; Aguilar, Manuel A.; Nemmaoui, Abderrahim; Aguilar, Fernando J.; Tarantino, Eufemia

    2016-10-01

    This paper shows the first comparison between data from Sentinel-2 (S2) Multi Spectral Instrument (MSI) and Landsat 8 (L8) Operational Land Imager (OLI) headed up to greenhouse detection. Two closely related in time scenes, one for each sensor, were classified by using Object Based Image Analysis and Random Forest (RF). The RF input consisted of several object-based features computed from spectral bands and including mean values, spectral indices and textural features. S2 and L8 data comparisons were also extended using a common segmentation dataset extracted form VHR World-View 2 (WV2) imagery to test differences only due to their specific spectral contribution. The best band combinations to perform segmentation were found through a modified version of the Euclidian Distance 2 index. Four different RF classifications schemes were considered achieving 89.1%, 91.3%, 90.9% and 93.4% as the best overall accuracies respectively, evaluated over the whole study area.

  11. Treatment of agro based industrial wastewater in sequencing batch reactor: performance evaluation and growth kinetics of aerobic biomass.

    Science.gov (United States)

    Lim, J X; Vadivelu, V M

    2014-12-15

    A sequencing batch reactor (SBR) with a working volume of 8 L and an exchange ratio of 25% was used to enrich biomass for the treatment of the anaerobically treated low pH palm oil mill effluent (POME). The influent concentration was stepwise increased from 5000 ± 500 mg COD/L to 11,500 ± 500 mg COD/L. The performance of the reactor was monitored at different organic loading rates (OLRs). It was found that approximately 90% of the COD content of the POME wastewater was successfully removed regardless of the OLR applied to the SBR. Cycle studies of the SBR show that the oxygen uptake by the biomass while there is no COD reduction may be due to the oxidation of the storage product by the biomass. Further, the growth kinetic parameters of the biomass were determined in batch experiments using respirometer. The maximum specific growth rate (μmax) was estimated to be 1.143 day(-1) while the half saturation constant (Ks) with respect to COD was determined to be 0.429 g COD/L. The decay coefficient (bD) and biomass yield (Y) were found to be 0.131 day(-1) and 0.272 mg biomass/mg COD consumed, respectively.

  12. 基于模糊综合评价的客户知识管理绩效评价研究%Fuzzy Comprehensive Evaluation Based on Customer Knowledge Management Performance Evaluation

    Institute of Scientific and Technical Information of China (English)

    李玉保

    2012-01-01

    In this paper, the perfonnance evaluation of customer knowledge management is regarded as the research object. First of all, the paper analyzes enterprise knowledge management perfonnance evaluation and customer knowledge management. Then, based on CMAT,it builds the customer knowledge management performance evaluation index system. Finally, it gives the model the evaluation process of the fuzzy comprehensive evaluation. All of the information can provide a research framework to cany out customer knowledge management performance evaluation effectively for enterprises.%以客户知识管理绩效评价为研究对象.对企业知识管理绩效评价和客户知识管理进行了分析.建立了基于CMAT的客户知识管理绩效评价指标体系.给出了模糊综合评价的评价过程模型.为企业有效实施客户知识管理绩效评价提供了一个研究框架.

  13. On the development and performance evaluation of a multiobjective GA-based RBF adaptive model for the prediction of stock indices

    Directory of Open Access Journals (Sweden)

    Babita Majhi

    2014-09-01

    Full Text Available This paper develops and assesses the performance of a hybrid prediction model using a radial basis function neural network and non-dominated sorting multiobjective genetic algorithm-II (NSGA-II for various stock market forecasts. The proposed technique simultaneously optimizes two mutually conflicting objectives: the structure (the number of centers in the hidden layer and the output mean square error (MSE of the model. The best compromised non-dominated solution-based model was determined from the optimal Pareto front using fuzzy set theory. The performances of this model were evaluated in terms of four different measures using Standard and Poor 500 (S&P500 and Dow Jones Industrial Average (DJIA stock data. The results of the simulation of the new model demonstrate a prediction performance superior to that of the conventional radial basis function (RBF-based forecasting model in terms of the mean average percentage error (MAPE, directional accuracy (DA, Thelis’ U and average relative variance (ARV values.

  14. Evaluating harvest-based control of invasive fish with telemetry: Performance of sea lamprey traps in the Great Lakes

    Science.gov (United States)

    Holbrook, Christopher; Bergstedt, Roger A.; Barber, Jessica M.; Bravener, Gale A; Jones, Michael L.; Krueger, Charles C.

    2016-01-01

    Physical removal (e.g., harvest via traps or nets) of mature individuals may be a cost-effective or socially acceptable alternative to chemical control strategies for invasive species, but requires knowledge of the spatial distribution of a population over time. We used acoustic telemetry to determine the current and possible future role of traps to control and assess invasive sea lampreys, Petromyzon marinus, in the St. Marys River, the connecting channel between Lake Superior and Lake Huron. Exploitation rates (i.e., fractions of an adult sea lamprey population removed by traps) at two upstream locations were compared among three years and two points of entry to the system. Telemetry receivers throughout the drainage allowed trap performance (exploitation rate) to be partitioned into two components: proportion of migrating sea lampreys that visited trap sites (availability) and proportion of available sea lampreys that were caught by traps (local trap efficiency). Estimated exploitation rates were well below those needed to provide population control in the absence of lampricides and were limited by availability and local trap efficiency. Local trap efficiency estimates for acoustic-tagged sea lampreys were lower than analogous estimates regularly obtained using traditional mark–recapture methods, suggesting that abundance had been previously underestimated. Results suggested major changes would be required to substantially increase catch, including improvements to existing traps, installation of new traps, or other modifications to attract and retain more sea lampreys. This case study also shows how bias associated with telemetry tags can be estimated and incorporated in models to improve inferences about parameters that are directly relevant to fishery management.

  15. A performance evaluation of a new iron oxide-based porous ceramsite (IPC) in biological aerated filters.

    Science.gov (United States)

    Bao, Teng; Chen, Tianhu; Ezzatahmadi, Naeim; Rathnayake, Suramya I; Chen, Dong; Wille, Marie-Luise; Frost, Ray

    2017-04-01

    A novel medium containing iron oxide-based porous ceramsite (IPC) and commercial ceramsite (CC) was used in two laboratory-scale upflow biological aerated filters (BAFs) to treat city wastewater to compare their efficacy in wastewater treatment. The IPC BAF and CC BAF were operated in water at 20-26°C, an air/water (A/W) ratio of: 3:1 and hydraulic retention times (HRTs) of 7, 3.5, 1.75, and 0.5 h and the removal of ammonia nitrogen (NH3-N), total nitrogen (TN), total organic carbon (TOC), and phosphorus (P) were studied. Our results indicated that IPC BAF was superior to CC BAF in terms of TOC, TN, NH3-N, and P removal. IPC had higher total porosity and larger total surface area than CC. The interconnected porous structure of IPC was suitable to microbial growth, protozoan, and metazoan organisms were primarily found in the accumulated biofilm layer. Biomass, in the biofilm layer, was detected at three distinct distances (300, 900, and 1500 mm) from the bottom of the inlet filter, again indicating that the IPC was more suitable for biomass growth. The presence of biomass improves the simultaneous removal efficiency of nitrogen and phosphorus in the IPC BAF. Thus, our findings support IPC as a material for use in filter media in wastewater treatment BAFs.

  16. Performance evaluation of an automotive thermoelectric generator

    Science.gov (United States)

    Dubitsky, Andrei O.

    Around 40% of the total fuel energy in typical internal combustion engines (ICEs) is rejected to the environment in the form of exhaust gas waste heat. Efficient recovery of this waste heat in automobiles can promise a fuel economy improvement of 5%. The thermal energy can be harvested through thermoelectric generators (TEGs) utilizing the Seebeck effect. In the present work, a versatile test bench has been designed and built in order to simulate conditions found on test vehicles. This allows experimental performance evaluation and model validation of automotive thermoelectric generators. An electrically heated exhaust gas circuit and a circulator based coolant loop enable integrated system testing of hot and cold side heat exchangers, thermoelectric modules (TEMs), and thermal interface materials at various scales. A transient thermal model of the coolant loop was created in order to design a system which can maintain constant coolant temperature under variable heat input. Additionally, as electrical heaters cannot match the transient response of an ICE, modelling was completed in order to design a relaxed exhaust flow and temperature history utilizing the system thermal lag. This profile reduced required heating power and gas flow rates by over 50%. The test bench was used to evaluate a DOE/GM initial prototype automotive TEG and validate analytical performance models. The maximum electrical power generation was found to be 54 W with a thermal conversion efficiency of 1.8%. It has been found that thermal interface management is critical for achieving maximum system performance, with novel designs being considered for further improvement.

  17. Automated attenuation-based tube voltage selection for body CTA: Performance evaluation of 192-slice dual-source CT

    Energy Technology Data Exchange (ETDEWEB)

    Winklehner, Anna; Gordic, Sonja; Lauk, Eliane; Frauenfelder, Thomas; Alkadhi, Hatem; Husarik, Daniela B. [University Hospital Zurich, Institute for Diagnostic and Interventional Radiology, Zurich (Switzerland); Leschka, Sebastian [University Hospital Zurich, Institute for Diagnostic and Interventional Radiology, Zurich (Switzerland); Division of Radiology and Nuclear Medicine, St. Gallen (Switzerland)

    2015-08-15

    To assess radiation dose and image quality in body CT-angiography (CTA) with automated attenuation-based tube voltage selection (ATVS) on a 192-slice dual-source CT (DSCT). Forty patients (69.5 ± 9.6 years) who had undergone body CTA with ATVS (ref.kVp 100, ref.mAs 90) using a 2x192-slice CT in single-source mode were retrospectively included. All patients had undergone prior CTA with a 2x128-slice CT and ATVS with identical imaging and contrast media protocols, serving for comparison. Images were reconstructed with iterative reconstruction at similar strength levels. Radiation dose was determined. Image quality was assessed semi-quantitatively (1:excellent, 5:non-diagnostic), aortic attenuation, noise and CNR were determined. As compared to 128-slice DSCT, 192-slice DSCT selected tube voltages were lower in 30 patients (75 %), higher in 3 (7.5 %), and similar in 7 patients (17.5 %). CTDI{sub vol} was lower with 192-slice DSCT (4.7 ± 1.9 mGy vs. 5.8 ± 2.1 mGy; p < 0.001). Subjective image quality, mean aortic attenuation (342 ± 67HU vs. 268 ± 67HU) and CNR (9.8 ± 2.5 vs. 8.2 ± 2.9) were higher with 192-slice DSCT (all p < 0.01), all datasets being diagnostic. Our study suggests that ATVS of 192-slice DSCT for body CTA is associated with an improved image quality and further radiation dose reduction of 19 % compared to 128-slice DSCT. (orig.)

  18. TAP 2: Performance-Based Training Manual

    Energy Technology Data Exchange (ETDEWEB)

    1993-08-01

    Cornerstone of safe operation of DOE nuclear facilities is personnel performing day-to-day functions which accomplish the facility mission. Performance-based training is fundamental to the safe operation. This manual has been developed to support the Training Accreditation Program (TAP) and assist contractors in efforts to develop performance-based training programs. It provides contractors with narrative procedures on performance-based training that can be modified and incorporated for facility-specific application. It is divided into sections dealing with analysis, design, development, implementation, and evaluation.

  19. PERFORMANCE EVALUATION: LITERATURE REVIEW AND TIME EVOLUTION.

    Directory of Open Access Journals (Sweden)

    Pintea Mirela-Oana

    2012-07-01

    Full Text Available Performance evaluation of an economic entity requires approaching several criteria, such as industry and economic entity type, managerial and entrepreneurial strategy, competitive environment, human and material resources available, using a system of appropriate performance indicators for this purpose.The exigencies of communication occurred on the growing number of phenomena that marked the global economy in recent decades (internationalization and relocation of business crises and turmoil in financial markets, demand performance measurement to be made in a comprehensive way by financial and non-financial criteria. Indicators are measures of performance used by management to measure, report and improve performance of the economic entity. The relationship between indicators and management is ensured by the existence of performance measurement systems. Studies to date indicate that economic entities using balanced performance measurement systems as a key management tool registered superior performance compared to entities not using such systems. This study attempts to address the issue of performance evaluation by presenting opinions of different authors concerning the process of performance measurement and to present, after revising the literature, the evolution of the performance evaluation systems. We tried to do this literature review because sustainable development and, therefore, globalization require new standards of performance that exceeds the economic field, both for domestic companies as well as international ones. So, these standards should be integrated into corporate strategy development to ensure sustainability of activities undertaken by harmonizing the economic, social and environmental objectives. To assess the performance of economic entities it is required that performance evaluation to be done with a balanced multidimensional system, including both financial ratios and non-financial indicators in order to reduce the limits of

  20. High-Performance Monopropellants and Catalysts Evaluated

    Science.gov (United States)

    Reed, Brian D.

    2004-01-01

    The NASA Glenn Research Center is sponsoring efforts to develop advanced monopropellant technology. The focus has been on monopropellant formulations composed of an aqueous solution of hydroxylammonium nitrate (HAN) and a fuel component. HAN-based monopropellants do not have a toxic vapor and do not need the extraordinary procedures for storage, handling, and disposal required of hydrazine (N2H4). Generically, HAN-based monopropellants are denser and have lower freezing points than N2H4. The performance of HAN-based monopropellants depends on the selection of fuel, the HAN-to-fuel ratio, and the amount of water in the formulation. HAN-based monopropellants are not seen as a replacement for N2H4 per se, but rather as a propulsion option in their own right. For example, HAN-based monopropellants would prove beneficial to the orbit insertion of small, power-limited satellites because of this propellant's high performance (reduced system mass), high density (reduced system volume), and low freezing point (elimination of tank and line heaters). Under a Glenn-contracted effort, Aerojet Redmond Rocket Center conducted testing to provide the foundation for the development of monopropellant thrusters with an I(sub sp) goal of 250 sec. A modular, workhorse reactor (representative of a 1-lbf thruster) was used to evaluate HAN formulations with catalyst materials. Stoichiometric, oxygen-rich, and fuelrich formulations of HAN-methanol and HAN-tris(aminoethyl)amine trinitrate were tested to investigate the effects of stoichiometry on combustion behavior. Aerojet found that fuelrich formulations degrade the catalyst and reactor faster than oxygen-rich and stoichiometric formulations do. A HAN-methanol formulation with a theoretical Isp of 269 sec (designated HAN269MEO) was selected as the baseline. With a combustion efficiency of at least 93 percent demonstrated for HAN-based monopropellants, HAN269MEO will meet the I(sub sp) 250 sec goal.

  1. Model performance evaluation (validation and calibration) in model-based studies of therapeutic interventions for cardiovascular diseases : a review and suggested reporting framework.

    Science.gov (United States)

    Haji Ali Afzali, Hossein; Gray, Jodi; Karnon, Jonathan

    2013-04-01

    Decision analytic models play an increasingly important role in the economic evaluation of health technologies. Given uncertainties around the assumptions used to develop such models, several guidelines have been published to identify and assess 'best practice' in the model development process, including general modelling approach (e.g., time horizon), model structure, input data and model performance evaluation. This paper focuses on model performance evaluation. In the absence of a sufficient level of detail around model performance evaluation, concerns regarding the accuracy of model outputs, and hence the credibility of such models, are frequently raised. Following presentation of its components, a review of the application and reporting of model performance evaluation is presented. Taking cardiovascular disease as an illustrative example, the review investigates the use of face validity, internal validity, external validity, and cross model validity. As a part of the performance evaluation process, model calibration is also discussed and its use in applied studies investigated. The review found that the application and reporting of model performance evaluation across 81 studies of treatment for cardiovascular disease was variable. Cross-model validation was reported in 55 % of the reviewed studies, though the level of detail provided varied considerably. We found that very few studies documented other types of validity, and only 6 % of the reviewed articles reported a calibration process. Considering the above findings, we propose a comprehensive model performance evaluation framework (checklist), informed by a review of best-practice guidelines. This framework provides a basis for more accurate and consistent documentation of model performance evaluation. This will improve the peer review process and the comparability of modelling studies. Recognising the fundamental role of decision analytic models in informing public funding decisions, the proposed

  2. Research on Evaluation Model of HEI Scientific and Technology Research Team Performance Evaluation Based on AHP and TOPSIS%基于AHP和TOPSIS的高校科研团队绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    包含丽; 郑伟; 韦小青

    2012-01-01

    The paper established an evaluation index system of HEI scientific research team performance, and put forward evaluation model based on analytical hierarchy process ( AHP) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) by similarity to an ideal solution ( TOPSIS) . Using AHP, the evaluation index was made. The posi-tive ideal solution, negative ideal solution and proximity were calculated. The rank of HEI scientific and technology re-search team performance evaluation was made by comparing the proximity. An example was analysis to validate the practica-bility and feasibility of the established index system and model. The results proved the evaluation index system could give a new kind of methods for HEI scientific research team performance evaluation.%建立了高技科研团队绩效评价指标体系,提出了基于层次分析法(AHP)和逼近理想求解的排序法(TOPSIS)的高校科研团队绩效评价模型,利用AHP确定评价指标的权重、TOPSIS排序法,计算正、负理想解和接近度;依据接近度对高校科研团队绩效评价指标进行比较,并进行了实例分析.分析结果表明:论文构建的科研团队评价指标体系具有一定的实用性,为高校科研团队绩效提供了一种评价依据.

  3. Performance evaluation of reflective electro-absorption modulator based optical source using a broadband light seed source for colorless WDM-PON applications.

    Science.gov (United States)

    Kim, Chul Han

    2013-05-20

    The performance of reflective electro-absorption modulator (R-EAM) based optical source has been evaluated for the use in high-capacity wavelength-division multiplexed passive optical networks (WDM-PONs). In our measurements, a broadband light source (BLS) was used as a seeding source for the cost-effective implementation of R-EAM based optical source. At first, a bit-error rate (BER) floor at 10(-6) was observed even in a back-to-back configuration with the BLS seeded R-EAM source. This is mainly because of the excess intensity noise (EIN) within BLS and the signal-to-noise ratio (SNR) degradation induced by a high insertion loss of R-EAM. To mitigate both effects of EIN and SNR degradation, a reflective semiconductor optical amplifier (RSOA) was also used for the implementation of our BLS seeded R-EAM source. Then, we have evaluated the impact of various noises, such as EIN, chromatic dispersion of transmission fiber and in-band crosstalk, on the system's performance using our BLS seeded R-EAM optical source. From the results, we have found that a 3-dB bandwidth of the BLS seeded R-EAM optical source should be wider than ~0.8 nm to achieve an error-free transmission of 1.25 Gb/s signal. We have also confirmed that there was a trade-off between the dispersion- and the in-band crosstalk-induced penalties due to the wide source bandwidth of our BLS seeded R-EAM source, like the cases of BLS seeded RSOA and Fabry-Perot laser diode (FP-LD) sources.

  4. Performance Evaluation of Frequent Subgraph Discovery Techniques

    Directory of Open Access Journals (Sweden)

    Saif Ur Rehman

    2014-01-01

    Full Text Available Due to rapid development of the Internet technology and new scientific advances, the number of applications that model the data as graphs increases, because graphs have highly expressive power to model a complicated structure. Graph mining is a well-explored area of research which is gaining popularity in the data mining community. A graph is a general model to represent data and has been used in many domains such as cheminformatics, web information management system, computer network, and bioinformatics, to name a few. In graph mining the frequent subgraph discovery is a challenging task. Frequent subgraph mining is concerned with discovery of those subgraphs from graph dataset which have frequent or multiple instances within the given graph dataset. In the literature a large number of frequent subgraph mining algorithms have been proposed; these included FSG, AGM, gSpan, CloseGraph, SPIN, Gaston, and Mofa. The objective of this research work is to perform quantitative comparison of the above listed techniques. The performances of these techniques have been evaluated through a number of experiments based on three different state-of-the-art graph datasets. This novel work will provide base for anyone who is working to design a new frequent subgraph discovery technique.

  5. Evaluation of Performance Indexes of Emergency Department

    Directory of Open Access Journals (Sweden)

    Alireza Baratloo

    2015-02-01

    Full Text Available Introduction: The importance of evaluating performance indicators in the emergency department, as one of the most important departments of hospital, is obvious to everyone. Therefore, in this study we aimed to appraise the five performance indicators, approved by the ministry of health, in Shohadaye Tajrish hospital, Tehran, Iran. Methods: In a descriptive cross-sectional study based on the profiles of all the patients admitted to the emergency department, performance indicators in the emergency department were evaluated. The study was divided into 2 parts about the establishment of emergency medicine system and training the medical staff: the first 6 months of 1392 and the second. Then these 2 periods were compared using Mann-Whitney U test while P< 0.05 was considered as the level of significance. Results: Of the studied indicators, mean triage time was 6.04 minutes in the first 6 months which was reduced to 1.5 minutes in the second 6 months (p=0.016. In addition, the percentage of patients who moved out of the department in 12 hours was lowered from 97.3% in the first period to 90.4% in the second (p=0.004. While, the percentage of patients who were decided upon in 6 hours (p=0.2, unsuccessful CPR percentage (p=0.34 and patients discharged against medical advice (p=0.42 showed no significant difference. Conclusion: The results of this study showed that the establishment of the emergency medicine system in the emergency department could lead to more efficient triage. Due to the differences made after their establishment including: different pattern of the patients admitted, increased stay of the patients in the department due to their need for prolonged intensive care, a raise in patient referral to the hospital by pre-hospital services and a higher percentage of occupied hospital beds, other indicators have not shown a significant improvement.

  6. ATAMM enhancement and multiprocessor performance evaluation

    Science.gov (United States)

    Stoughton, John W.; Mielke, Roland R.; Som, Sukhamoy; Obando, Rodrigo; Malekpour, Mahyar R.; Jones, Robert L., III; Mandala, Brij Mohan V.

    1991-01-01

    ATAMM (Algorithm To Architecture Mapping Model) enhancement and multiprocessor performance evaluation is discussed. The following topics are included: the ATAMM model; ATAMM enhancement; ADM (Advanced Development Model) implementation of ATAMM; and ATAMM support tools.

  7. Performance Evaluation of Deluge Protocol Based on Contiki/COOJA%基于Contiki/COOJA平台的Deluge协议性能测试

    Institute of Scientific and Technical Information of China (English)

    徐顶鑫; 易卫东

    2011-01-01

    Wireless reprogramming is to reprogram sensors wirelessly in situ. It is a key service for the development, deployment and maintenance of wireless sensor network. Large object data dissemination protocol is fundamental to support wireless reprogramming. Deluge is such a protocol and widely used in the TinyOS platform. In this paper, we evaluate the performance of Deluge through intensive simulation based on Contiki/COOJA platform. The evaluation metrics include time-to-completion, energy consumption, and transmission efficiency. Contiki implements a subtle mechanism at system level to support software-based on-line energy estimation of the sensor nodes. We adopt this method to evaluate the energy consumption of Deluge. On the other hand, we examine carefully the communication activities involved in the data dissemination process, especially the broadcast primitive. By analyzing our experiment results, we summarize both the advantages and problems of the Deluge protocol and put forward some method to improve its performance.%无线再编程就是对布置在现场的传感器节点进行远程程序代码更新.它对于无线传感器网络的开发、部署以及维护至关重要.大对象(large object)数据分发协议是无线再编程技术的基础.Deluge协议是一个为支持无线再编程而设计的代码分发协议,它在TinyOS平台上已经取得了广泛的应用.将用COOJA仿真器在Contiki平台上对Deluge协议的性能进行深入的测试.测试指标包括编程时间,能耗,以及传输效率等.Contiki在操作系统层面内建了支持对节点能耗水平进行在线测试的新机制,采用该方法来测量Deluge的能耗.同时,详细测试并分析了在Deluge代码分发过程中所涉及到的各种通信行为,重点分析了其采用广播方式进行通信的优缺点.最后,根据实验结果,提出了对Deluge进行改进的方法.

  8. Performance evaluation methodology for historical document image binarization.

    Science.gov (United States)

    Ntirogiannis, Konstantinos; Gatos, Basilis; Pratikakis, Ioannis

    2013-02-01

    Document image binarization is of great importance in the document image analysis and recognition pipeline since it affects further stages of the recognition process. The evaluation of a binarization method aids in studying its algorithmic behavior, as well as verifying its effectiveness, by providing qualitative and quantitative indication of its performance. This paper addresses a pixel-based binarization evaluation methodology for historical handwritten/machine-printed document images. In the proposed evaluation scheme, the recall and precision evaluation measures are properly modified using a weighting scheme that diminishes any potential evaluation bias. Additional performance metrics of the proposed evaluation scheme consist of the percentage rates of broken and missed text, false alarms, background noise, character enlargement, and merging. Several experiments conducted in comparison with other pixel-based evaluation measures demonstrate the validity of the proposed evaluation scheme.

  9. Performance Evaluation of Portfolios with Margin Requirements

    OpenAIRE

    Hui Ding; Zhongbao Zhou; Helu Xiao; Chaoqun Ma; Wenbin Liu

    2014-01-01

    In financial markets, short sellers will be required to post margin to cover possible losses in case the prices of the risky assets go up. Only a few studies focus on the optimization and performance evaluation of portfolios in the presence of margin requirements. In this paper, we investigate the theoretical foundation of DEA (data envelopment analysis) approach to evaluate the performance of portfolios with margin requirements from a different perspective. Under the mean-variance framework,...

  10. 基于EVA视角下的报业集团绩效评价%Discussion on the Performance Evaluation of Press Group Based on EVA

    Institute of Scientific and Technical Information of China (English)

    张新星

    2015-01-01

    In recent years, China’s press industry is developing rapidly. At the same time of developing the traditional business, some press groups explore the cross-regional, cross-industrial, multi-faceted and multi-level development on the basis of their own resources. Their development level is being affected by mar⁃ket factors more and more obviously.But the traditional financial performance evaluation system based on the income, profit, net assets yield and others can not meet the needs of the modern press group ’s multi level gover⁃nance structure and diversification management . Taking the Economic Value Added (EVA) as the break⁃through point, this paper has done a preliminary discussion on the method and system of performance evaluation of press groups .%近年来,我国报业发展迅猛,一些报业集团在坚持发展传统主业的同时,依托自身资源优势进行了跨地区、跨行业、多方位、多层次的发展探索,其发展程度、发展水平受市场因素的影响也越来越明显。而传统的收入、利润、净资产收益率等财务绩效评价体系已满足不了现代报业集团多层级结构治理和多元化经营需要。本文以经济增加值(EVA)为切入点,对报业集团的绩效评价方法、体系进行了初步探讨。

  11. Evaluation of high-performance computing software

    Energy Technology Data Exchange (ETDEWEB)

    Browne, S.; Dongarra, J. [Univ. of Tennessee, Knoxville, TN (United States); Rowan, T. [Oak Ridge National Lab., TN (United States)

    1996-12-31

    The absence of unbiased and up to date comparative evaluations of high-performance computing software complicates a user`s search for the appropriate software package. The National HPCC Software Exchange (NHSE) is attacking this problem using an approach that includes independent evaluations of software, incorporation of author and user feedback into the evaluations, and Web access to the evaluations. We are applying this approach to the Parallel Tools Library (PTLIB), a new software repository for parallel systems software and tools, and HPC-Netlib, a high performance branch of the Netlib mathematical software repository. Updating the evaluations with feed-back and making it available via the Web helps ensure accuracy and timeliness, and using independent reviewers produces unbiased comparative evaluations difficult to find elsewhere.

  12. Assessment beyond Performance: Phenomenography in Educational Evaluation

    Science.gov (United States)

    Micari, Marina; Light, Gregory; Calkins, Susanna; Streitwieser, Bernhard

    2007-01-01

    Increasing calls for accountability in education have promoted improvements in quantitative evaluation approaches that measure student performance; however, this has often been to the detriment of qualitative approaches, reducing the richness of educational evaluation as an enterprise. In this article the authors assert that it is not merely…

  13. Performance evaluation of PL-11 platelet analyzer

    Institute of Scientific and Technical Information of China (English)

    张有涛

    2013-01-01

    Objective To evaluate and report the performance of PL-11 platelet analyzer. Methods Intravenous blood sam-ples anticoagulated with EDTA-K2 and sodium citrate were tested by the PL-11 platelet analyzer to evaluate the intra-assay and interassay coefficient of variation(CV),

  14. Building Leadership Talent through Performance Evaluation

    Science.gov (United States)

    Clifford, Matthew

    2015-01-01

    Most states and districts scramble to provide professional development to support principals, but "principal evaluation" is often lost amid competing priorities. Evaluation is an important method for supporting principal growth, communicating performance expectations to principals, and improving leadership practice. It provides leaders…

  15. A VV&A evaluation system based on hierarchical evaluation

    Institute of Scientific and Technical Information of China (English)

    FANG Ke; YANG Ming; WANG Zi-cai

    2005-01-01

    Evaluation is the major activity of performing Verification, Validation and Accreditation (VV&A) of a simulation system. Unfortunately, there is a lack of reasonable and operable evaluation methods. Moreover,there are other problems to address in VV&A evaluation, such as index definition, conclusion analysis, etc. In this paper, a VV&A evaluation system is introduced to try to resolve these problems. The system is based on a method called hierarchical evaluation, and it uses a good combination of evaluation processes and indexes.First, a thorough analysis of the VV&A evaluation' s essentials and principles are given, then the uncertainty of the evaluation results caused by various analysis of the evaluators is pointed out, then a hierarchical evaluation mechanism based on evaluator weight and evaluation hierarchy is brought forward, and finally a comprehensive VV&A evaluation system with evaluation flow processing, index management and hierarchical evaluation fulfillment is established. The system gives good consideration to ease of operation, reasonableness of evaluation conclusion, and the ability to comprehensively resolve VV&A problems. Since VV&A is attracting more and more recognition, it is meaningful to provide a good system for implementing credible simulation systems. It is hoped that this VV&A evaluation will provide a good way.

  16. 基于灰色聚类决策的图像分割性能评价%Performance evaluation based on grey clustering of segmentation

    Institute of Scientific and Technical Information of China (English)

    吴志川; 彭国华

    2012-01-01

    In view of the performance analyses of image segmentation, a hierarchical synthetic evaluation method is proposed based on the grey clustering. The method obtains the appropriate albinism function by target characteristic, then the scattered information produces cluster matrix. The new method can distinguish the performances from different segmentation algorithms easily. The experiments show that the method has higher sensitivity and lower singularity than other methods, and can be more effectively used to analyze the performance of segmentation algorithms.%针对图像分割的性能分析问题,运用灰色聚类决策技术建立一种多层次的综合评估方法.该方法通过图像多个分割指标的特点,得到合适的白化函数,再通过白化函数和灰色聚类权值的分析计算,将收集到的分散信息生成灰色聚类矩阵,以此对图像分割性能进行分类;其评估结果的离散性高,便于区分不同分割算法的性能.应用实例表明,该方法很好地克服了以往评估方法的不灵敏性和奇异性,从而使评判更容易进行.

  17. Multilingual Database Management System: A Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Nurul H.M. Saad

    2011-01-01

    Full Text Available Problem statement: The use of English as well as Arabic language is increasingly evident in the aspects of international business and finance. This study explored the management of multilingual data in multilingual system, to cater two or more different speakers of Internet users. Approach: The proposed method divided into two ends: The front-end that consisted of the Client and the Translator components and the back-end where the management module and the database located. In this method, a single encoded table required to store information and corresponding dictionaries needed to store the multilingual data. The proposed method based on the framework presented in previous work with some modification to suit with characteristics of chosen languages. Results: Experimental evaluation was performed in storage requirement and mathematical analysis had been used to show the time of each database operations for both of the traditional and the proposed method. Conclusion/Recommendations: The proposed method found to be consistently performed well in the developed multilingual system.

  18. Performance Evaluation of Yunnan Railway Based on DEA Method%基于DEA的云南铁路绩效研究

    Institute of Scientific and Technical Information of China (English)

    王琢; 赖应良

    2013-01-01

      随着当代经济的高速发展,作为资源大省的云南省,其经济增长很大程度上依靠长距离、大能力的铁路运输来实现,科学评价铁路的运营状况具有重要意义。基于DEA方法对云南铁路2002—2011年整个行业的统计数据进行收集整理,建立数学模型,进行绩效评价,并运用DEAP软件求解。结果认为,2002—2006年由于建设滞后,云南铁路运能严重不足从而成为制约经济发展的主要障碍之一,2007—2011年云南铁路的绩效在现有体制下已经无法再提高,规模效率也趋于稳定,要想在更高层次上提高铁路行业绩效,必须进一步推进改革。%With the rapid development of the contemporary economy,the economic growth of Yunnan Province depends on the long-distance,large-capacity rail transport. The railway operational status of the scientific evaluation has important significance. Statistics based on the DEA methods of the entire industry of Yunnan Railway 2002—2011 were collected to establish the mathematical model,to evaluate the performance,and to solve using DEAP software. From 2002 to 2006,Yunnan railway transport capacity was serious weakened,thus becoming one of the major obstacles that impede economic development. Yunnan Railway’s performance in 2007—2011 under the current system has been unable to further increase the efficiency of scale to stabilize at a higher level. In order to improve the performance of the railway industry,the reform must be further promoted.

  19. An improved multilevel fuzzy comprehensive evaluation algorithm for security performance

    Institute of Scientific and Technical Information of China (English)

    LI Ling-juan; SHEN Ling-tong

    2006-01-01

    It is of great importance to take various factors into account when evaluating the network security performance.Multilevel fuzzy comprehensive evaluation is a relatively valid method. However, the traditional multilevel fuzzy comprehensive evaluation algorithm relies on the expert's knowledge and experiences excessively, and the result of the evaluation is usually less accurate. In this article, an improved multilevel fuzzy comprehensive evaluation algorithm, based on fuzzy sets core and entropy weight is presented. Furthermore, a multilevel fuzzy comprehensive evaluation model of P2P network security performance has also been designed, and the improved algorithm is used to make an instant computation based on the model. The advantages of the improved algorithm can be embodied in comparison with the traditional evaluation algorithm.

  20. Warehousing Performance Evaluation for Logistics Enterprises Based on Entropy Method%基于熵值法的物流公司仓储绩效评价

    Institute of Scientific and Technical Information of China (English)

    杨志伟

    2011-01-01

    The paper establishes the index system for the evaluation of warehousing performance of logistics enterprises and uses the entropy method to do the objective evaluation, yielding performance ranking for the reference of concerned logistics personnel.%建立了物流企业仓储运营绩效评价指标体系,并用熵值法对不同仓库的绩效进行了较为客观的分析评价,得出绩效排名以供相关物流人员参考.

  1. Performance Evaluation of Portfolios with Margin Requirements

    Directory of Open Access Journals (Sweden)

    Hui Ding

    2014-01-01

    Full Text Available In financial markets, short sellers will be required to post margin to cover possible losses in case the prices of the risky assets go up. Only a few studies focus on the optimization and performance evaluation of portfolios in the presence of margin requirements. In this paper, we investigate the theoretical foundation of DEA (data envelopment analysis approach to evaluate the performance of portfolios with margin requirements from a different perspective. Under the mean-variance framework, we construct the optimization model and portfolio possibility set on considering margin requirements. The convexity of the portfolio possibility set is proved and the concept of efficiency in classical economics is extended to the portfolio case. The DEA models are then developed to evaluate the performance of portfolios with margin requirements. Through the simulations carried out in the end, we show that, with adequate portfolios, DEA can be used as an effective tool in computing the efficiencies of portfolios with margin requirements for the performance evaluation purpose. This study can be viewed as a justification of DEA into performance evaluation of portfolios with margin requirements.

  2. Evaluating student performance in clinical dietetics.

    Science.gov (United States)

    Novascone, M A

    1985-06-01

    The focus of this study was on the development and field-testing of a set of behaviorally anchored rating scales for evaluating the clinical performance of dietetic students. The scales emphasized the application of skills and knowledge. A variation of the Smith-Kendall technique was used to develop the scales. The 42 participants involved in instrument development included dietetic students, didactic and clinical instructors, and dietetic practitioners. The completed instrument contained 8 dimension statements and 70 behavioral anchors. The instrument was field-tested in 16 clinical rotations within 8 dietetic education programs. Evaluators not only rated student performance but also critiqued the format and content of the scales. The mid-to-upper portions of each scale were used most frequently, and little score variation within or across programs was noted. The scales were deemed appropriate for formative evaluation; however, some evaluators who had to grade students' performance expressed a desire for performance standards defined in terms of grades. Because the process used to develop the instrument facilitated the articulation of performance criteria, it is recommended as a practical approach to setting performance standards.

  3. Study of internal performance evaluation based on integrated supply chain%基于集成化供应链的内部绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    尚利; 王爱军; 吕玉惠

    2015-01-01

    供应商作为供应链中重要的环节,它的内部绩效表现己经成为企业面对的共性和关键问题。有效的供应链管理与绩效评价是供应链管理过程中不可分割的重要组成部分,要有效地管理供应链就必须对供应链项目绩效进行评估。从供应链内部角度构建集成化供应链项目绩效评价指标体系,初步构建绩效评价模型,并运用层次分析法和模糊综合评价法对供应链绩效进行评价。%As an important link in the supply chain,Suppliers’inner performance has become a common and key problem in the face of enterprises. The effective supply chain management and performance evaluation are the impartible important part in the process of supply chain management. This study tries to construct an integrated supply chain performance index system from the internal side of supply chain. A performance evaluation model was built preliminarily. The performance evaluation of in⁃tegrated supply chain was performed with AHP and FCE.

  4. Research Performance Evaluation: Some Critical Thoughts on Standard Bibliometric Indicators

    Science.gov (United States)

    Anninos, Loukas N.

    2014-01-01

    The bibliometric methodology is an established technique for research evaluation as it offers an objective determination and comparison of research performance. This paper aims to critically assess some standard bibliometric indicators commonly used (based on publication and citation counts) to evaluate academic units, and examine whether there…

  5. Performance Evaluation of CRW Reef-Scale and Broad-Scale SST-Based Coral Monitoring Products in Fringing Reef Systems of Tobago

    Directory of Open Access Journals (Sweden)

    Shaazia S. Mohammed

    2015-12-01

    Full Text Available Satellite-derived sea surface temperature (SST is used to monitor coral bleaching through the National Oceanic and Atmospheric Administration’s Coral Reef Watch (CRW Decision Support System (DSS. Since 2000, a broad-scale 50 km SST was used to monitor thermal stress for coral reefs globally. However, some discrepancies were noted when applied to small-scale fringing coral reefs. To address this, CRW created a new DSS, specifically targeted at or near reef scales. Here, we evaluated the new reef-scale (5 km resolution products using in situ temperature data and coral bleaching surveys which were also compared with the heritage broad-scale (50 km for three reefs (Buccoo Reef, Culloden and Speyside of the southern Caribbean island of Tobago. Seasonal and annual biases indicated the new 5 km SST generally represents the conditions at these reefs more accurately and more consistently than the 50 km SST. Consistency between satellite and in situ temperature data influences the performance of anomaly-based predictions of bleaching: the 5 km DHW product showed better consistency with bleaching observations than the 50 km product. These results are the first to demonstrate the improvement of the 5 km products over the 50 km predecessors and support their use in monitoring thermal stress of reefs in the southern Caribbean.

  6. Performance evaluation of the general characteristics based off-lattice Boltzmann and DUGKS methods for low speed continuum flows: A comparative study

    CERN Document Server

    Zhu, Lianhua; Guo, Zhaoli

    2015-01-01

    The general characteristics based off-lattice Boltzmann scheme (BKG) proposed by Bardow et~al.(2006), and the discrete unified gas kinetic scheme (DUGKS) are two methods that successfully overcome the time step restriction by the collision time, which is commonly seen in many other kinetic schemes. Basically, the BKG scheme is a time splitting scheme, while the DUGKS is an un-split finite volume scheme. In this work, we first perform a theoretical analysis of the two schemes in the finite volume framework by comparing their numerical flux evaluations. It is found that the effects of collision term are considered in the reconstructions of the cell-interface distribution function in both schemes, which explains why they can overcome the time step restriction and can give accurate results even as the time step is much larger than the collision time. The difference between the two schemes lies in the treatment of the integral of the collision term, in which the Bardow's scheme uses the rectangular rule while the ...

  7. Performance Evaluation of Automobile Distribution Logistics Based on Quantitative Results%基于结果量化的汽车销售物流绩效评估

    Institute of Scientific and Technical Information of China (English)

    李蓉; 杨林玲; 王向银; 刘坚

    2011-01-01

    以汽车销售物流绩效服务水平为研究对象,将平衡计分卡法和层次分析法引入汽车销售物流的绩效评价中,构建了系统科学全面的汽车销售物流绩效评价体系并确定了指标的客观权重,设计了目标实现指数,实现了评价结果与企业战略规划对比,为汽车销售物流业务的量化绩效评估和持续改进提供了有效技术手段.实例验证了该方法的可操作性和实用性.%Aiming at increasing the performance level of automobile distribution logistics, a systematic and comprehensive quantitative performance evaluation system for automotive distribution logistics is developed in this paper. To evaluate the performance in the system, the index weights are determined by combining the balanced seorecard method (BSC) and analytic hierarchy process (AHP). In the system, it presents goal realization indices such that the quantitative performance evaluation results can be compared with the planned one. In this way, it can promote the continuous improvement of the performance. The feasibility, operability, and practicability of the proposed method are verified through examples.

  8. Methods of Evaluating Performances for Marketing Strategies

    OpenAIRE

    Ioan Cucu

    2005-01-01

    There are specific methods for assessing and improving the effectiveness of a marketing strategy. A marketer should state in the marketing plan what a marketing strategy is supposed to accomplish. These statements should set forth performance standards, which usually are stated in terms of profits, sales, or costs. Actual performance must be measured in similar terms so that comparisons are possible. This paper describes sales analysis and cost analysis, two general ways of evaluating the act...

  9. Performance evaluations of demountable electrical connections

    Science.gov (United States)

    Niemann, R. C.; Cha, Y. S.; Hull, J. R.; Buckles, W. E.; Daugherty, M. A.

    Electrical conductors operating in cryogenic environments can require demountable connections along their lengths. The connections must have low resistance and high reliability and should allow ready assembly and disassembly. In this work, the performance of two types of connections has been evaluated. The first connection type is a clamped surface-to-surface joint. The second connection type is a screwed joint that incorporates male and female machine-thread components. The connections for copper conductors have been evaluated experimentally at 77 K. Experimental variables included thread surface treatment and assembly methods. The results of the evaluations are presented.

  10. Smith Newton Vehicle Performance Evaluation - Cumulative (Brochure)

    Energy Technology Data Exchange (ETDEWEB)

    2014-08-01

    The Fleet Test and Evaluation Team at the U.S. Department of Energy's National Renewable Energy Laboratory is evaluating and documenting the performance of electric and plug-in hybrid electric drive systems in medium-duty trucks across the nation. U.S. companies participating in this evaluation project received funding from the American Recovery and Reinvestment Act to cover part of the cost of purchasing these vehicles. Through this project, Smith Electric Vehicles is building and deploying 500 all-electric medium-duty trucks that will be deployed by a variety of companies in diverse climates across the country.

  11. Reinvigorating performance evaluation: first steps in a local health department.

    Science.gov (United States)

    Smith, Kathleen N; Gunzenhauser, Jeffrey D; Fielding, Jonathan E

    2010-01-01

    The ability of a local health department to assess and improve employee performance through an effective evaluation process is critical to overall organizational success. A constructive performance evaluation process not only provides meaningful feedback on work performance but also provides opportunities to reinforce work behaviors that support the organization's mission, to recognize exceptional work, and to guide future growth and learning. The Los Angeles County Department of Public Health is creating a new approach to performance evaluation that recognizes 3 distinct components of work performance: standard business practices, competencies, and standards of practice. This multidimensional perspective acknowledges that the expectations of workers are complex and that evaluations of performance are not easily captured with single-dimension assessment tools. This report describes the conceptual relationships of these 3 components and how they integrate to form a single performance evaluation process. Key elements within this structure include a base document of competencies for all workers, expanded competency sets for professional staff, role-specific duty statements for workers who perform similar work, and standards of competent practice related to the mission of units to which individuals are assigned. Key first steps are to define the terminology of performance evaluation and to create role-specific duty statements.

  12. The Evaluation of the Effect of Processing Parameters on Adhesion Performance of Polyether based TPU over mold on to Polycarbonate Substrate

    Science.gov (United States)

    Patankar, Mukund Purushottam

    The overmolding process involves the use of two separate materials to form one cohesive component. The final product is a single piece, made out of polymers with very different mechanical properties that must be safe and permanently bonded together throughout its useful life. The first shot is generally a hard plastic and is referred to as a substrate the second material is generally a soft thermoplastic elostomer (TPE) and referred as overmold. The rigid substrate is used for structural purposes, and the softer materials are expected to take care of the user comfort. Overmolding can add immeasurable value to product design by enhancing the comforts for user, ergonomics, and ease of use. It finds applications in household appliances, hand tools, automotive interiors, hand held computers and medical devices. The most common problems with overmolding are insufficient chemical or mechanical bonding of the polymers, incomplete filling of one or more components, and flashing of overmold. This paper deals with adhesion issues and describes the study performed to evaluate the effect of processing parameters on adhesion performance of Polyether based TPU over mold on to Polycarbonate Substrate. The study established the effect of various processing parameters on the adhesion of overmold to substrate. In addition effect of various surface roughness of substrate on adhesion was also determined. Study also describes the criteria used to design specimen and the specimen tool was build. The specimens were molded using design of experiments. The specimens were tested using Inston universal testing machine by establishing the test procedure and test set up to yield consistent results. The force at which constant peel occurred, called peel force was determined for all experiments. The study concludes that melt temperature is the most dominating factor and the specimen molded with lower melt temperature results in good bond. Light roughness on the substrate surface further enhances

  13. Research on Operator's Comprehensive Performance Evaluation Index Based on Stock Option Incentive%股权激励下经营者综合业绩评价指标研究

    Institute of Scientific and Technical Information of China (English)

    李峰; 方炜

    2012-01-01

    This paper describes the operator performance evaluation index of current situation and problem using the stock option incentive. Based on this, it builds stock option incentive-based operator comprehensive performance evaluation index system and evaluation criteria through performance result, competency method and behavioral expression in three areas. Finally, it uses fuzzy comprehensive evaluation method to quantify the qualitative index.%介绍了股权激励下企业经营者业绩考核指标的现状和问题,在此基础上从绩效产出、胜任素质和行为表现三方面出发,构建了基于股权激励的经营者综合业绩考核指标体系以及评价标准,运用模糊综合评价方法量化了定性指标.

  14. Performance Evaluation and Simulation of Pressurized Gasification

    Directory of Open Access Journals (Sweden)

    C. Mohanraj

    2012-08-01

    Full Text Available The emergence of biomass based energy warrants the evaluation of syn-gas from biomass gasification as a fuel for power systems. The earlier investigations reveal that the operating parameters strongly affect the syn gas quality. The gasifier performance was investigated with different operating pressure. The downdraft gasifier has tested with silver oak woodchips of size approximately 12mm×12mm×12mm. The total feed of 8-8.5kg of wood was fed into the system and an airflow rate of 130 lpm supplied by compressor and the gasifier was tested different pressure conditions. The main variables namely oxidation zone temperature, combustible gas contents (H2, CO & CH4, calorific value, gas production rate and conversion efficiency was studied. The percentage of total combustible gas is varied between 30.60% - 35.97% and the average composition is N2 = 44.29% – 54.78%, CH4 = 0.62% – 1.51%, H2 = 15.7% – 25.48%, CO = 7.96% – 11.4%, CO2 = 11.37% – 19.70%. The calorific value of syn gas was found to vary between 3.860 MJ/m3 – 4.374.94 MJ/m3. The conversion efficiency varied between 86.8% - 73.7%.Computational fluid dynamics (CFD method was used to predict the performance of the down draft biomass gasifier. For simulation purpose the combustion zone of the gasifier was separately modeled and analyzed.

  15. Achieving "Fairness" in Data Fusion Performance Evaluation Development

    Science.gov (United States)

    2006-04-30

    Performance Evaluation Development 5b. GRANT NUMBER F49620-03-1-0037 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER Dr. James Llinas 5e...Evaluation Methods for Network Centric Data-Fusion Capable Tactical Platforms Kedar Sambhoos, Satyaki Ghosh Dastidar, James Llinas Christopher Bowman...were based settings were as follows: 8. ensor ID: Sensor matix wer based 1. Targets: 6 targets upon entity class confusion matrix per sensor mode. 2

  16. Measures of Searcher Performance: A Psychometric Evaluation.

    Science.gov (United States)

    Wildemuth, Barbara M.; And Others

    1993-01-01

    Describes a study of medical students that was conducted to evaluate measures of performance on factual searches of INQUIRER, a full-text database in microbiology. Measures relating to recall, precision, search term overlap, and efficiency are discussed; reliability and construct validity are considered; and implications for future research are…

  17. 48 CFR 436.604 - Performance evaluation.

    Science.gov (United States)

    2010-10-01

    ... CATEGORIES OF CONTRACTING CONSTRUCTION AND ARCHITECT-ENGINEER CONTRACTS Architect-Engineer Service 436.604... require a performance evaluation report on the work done by the architect-engineer after the completion of or during the construction of the designed project....

  18. Performance evaluation of lightweight piezocomposite curved actuator

    Science.gov (United States)

    Goo, Nam Seo; Kim, Cheol; Park, Hoon C.; Yoon, Kwang J.

    2001-07-01

    A numerical method for the performance evaluation of LIPCA actuators is proposed using a finite element method. Fully-coupled formulations for piezo-electric materials are introduced and eight-node incompatible elements used. After verifying the developed code, the behavior of LIPCA actuators is investigated.

  19. Performance evaluation of an air solar collector

    Science.gov (United States)

    1979-01-01

    Indoor tests on signal-glazed flat-plate collector are described in report. Marhsall Space Flight Center solar simulator is used to make tests. Test included evaluations on thermal performance under various combinations of flow rate, incident flux, inlet temperature, and wind speed. Results are presented in graph/table form.

  20. The FY 1998 Battelle performance evaluation and incentive fee agreement

    Energy Technology Data Exchange (ETDEWEB)

    Davis, T.L.

    1998-01-07

    Fiscal Year 1998 represents the second full year utilizing a results-oriented, performance-based contract. This document describes the critical outcomes, objectives, performance indicators, expected levels of performance, and the basis for the evaluation of the Contractors performance for the period October 1, 1997 through September 30, 1998, as required by Articles entitled Use of Objective Standards of Performance, Self Assessment and Performance Evaluation and Critical Outcomes Review of the Contract DE-AC06-76RL01830. In partnership with the Contractor and other key customers, the Department of Energy (DOE) Richland Operations Office has defined six critical outcomes that serve as the core for the Contractors performance evaluation. The Contractor also utilizes these outcomes as a basis for overall management of the Laboratory. The Critical Outcome system focuses all of the customer desires into specific objectives and performance indicators, with supporting measures to track and foster continued improvement in meeting the needs (outcomes) of the Laboratory`s customers. Section 1 provides information on how the overall performance rating for the Contractor will be determined. Section 2 provides the detailed information concerning critical outcomes, objectives, performance indicators and expectations of performance. Section 3 describes the commitments for documenting and reporting the Laboratory`s self-evaluation.

  1. 海运物流企业绩效研究%Performance Evaluation of the Maritime Logistics Enterprise based on DEA

    Institute of Scientific and Technical Information of China (English)

    宋成; 袁海燕

    2015-01-01

    为科学准确的评价我国海运物流企业的绩效水平,选取13家上市的海运物流企业,采用因子分析的方法对相关数据进行简化,从海运物流企业的偿债能力、经营发展能力、盈利能力、资本结构、未来发展方面构建海运物流企业绩效评价指标体系,运用数据包络分析方法对这些企业绩效情况进行实证分析,建立了投入产出的DEA模型,以此得出海运物流企业管理绩效评价值和前沿面图,结合评价结果和企业实际运营情况证实了这种方法对海运物流企业绩效研究有较好的应用价值.%In order to evaluate the maritime logistics enterprise performance in china scientifically and accurately,this paper selects 13 listed maritime logistics enterprises,simplifies the published financial data by the factor analysis method and builds the maritime logistics enterprises performance evaluation index system from the solvency of maritime logistics enterprises, the development capabilities, the profitability, the capital structure and the future developments. It analyzes the maritime logistics enterprises performance using the data envelopment analysis method,gives the input-output DEA model,draws the maritime logistics enterprise management performance evaluation results. Finally,the practicalities are proved by the comprehensive evaluation results and the actual operating conditions.

  2. Evaluation of port logistics performance based on fuzzy comprehensive analysis%基于模糊综合分析的港口物流绩效评价

    Institute of Scientific and Technical Information of China (English)

    张丽凤; 占鹏飞

    2013-01-01

    As the economic globalization develops deeply , the trades among countries become more frequent , which makes the port logistics activities be in an increasingly important role in the economic development , and the evaluation of the port logistics activities performance is a kind of effective means to enhance the competitiveness in port logistics activities.How to analyse and evaluate the port logistics operation performance scientifically and com -prehensively has become the topic part to be solved in the logistics activities .This paper constructs index system of the port logistics performance comprehensive evaluation , and then applies the synthetic vague mathematical analy-sis method to evaluate and analyse quantitatively the performance of the port logistics activities .The paper about Jinzhou port logistics activities is an empirical analysis , and the results can really reflect the port logistics activities situation.%  对港口物流绩效进行评价是提升港口物流竞争力的一种有效手段,如何科学、全面地分析和评判港口物流的运营绩效,已成为港口物流迫切需要解决的课题。论文构建了一个港口物流绩效综合评价指标体系,运用模糊综合数学分析方法对港口物流的绩效进行了量化评判与分析。通过对锦州港口物流绩效进行的实证分析表明,该指标体系能够比较真实的反映其港口的物流状况。

  3. Behavioral patterns of environmental performance evaluation programs.

    Science.gov (United States)

    Li, Wanxin; Mauerhofer, Volker

    2016-11-01

    During the past decades numerous environmental performance evaluation programs have been developed and implemented on different geographic scales. This paper develops a taxonomy of environmental management behavioral patterns in order to provide a practical comparison tool for environmental performance evaluation programs. Ten such programs purposively selected are mapped against the identified four behavioral patterns in the form of diagnosis, negotiation, learning, and socialization and learning. Overall, we found that schemes which serve to diagnose environmental abnormalities are mainly externally imposed and have been developed as a result of technical debates concerning data sources, methodology and ranking criteria. Learning oriented scheme is featured by processes through which free exchange of ideas, mutual and adaptive learning can occur. Scheme developed by higher authority for influencing behaviors of lower levels of government has been adopted by the evaluated to signal their excellent environmental performance. The socializing and learning classified evaluation schemes have incorporated dialogue, participation, and capacity building in program design. In conclusion we consider the 'fitness for purpose' of the various schemes, the merits of our analytical model and the future possibilities of fostering capacity building in the realm of wicked environmental challenges.

  4. 基于PDCA的供应链视角下物流客户服务绩效评价研究%Performance Evaluation Logistics Customer Service from Supply Chain Perspective Based on PDCA Cycle

    Institute of Scientific and Technical Information of China (English)

    汪利虹; 刘志学

    2012-01-01

    在系统总结国内外相关文献的基础上,设计了基于PDCA循环的供应链视角下物流客户服务绩效评价流程,并针对每个流程给出了控制重点,旨在通过对绩效评价流程的规范管理,不断提高物流客户服务绩效和供应链整体绩效水平.在绩效评价方案设计环节提出了给予供应链整体绩效提升的物流客户服务绩效评价方法和指标体系,在绩效评价方案实施环节给出了应用模糊层次分析法选择物流服务商的步骤.%Based on classic PDCA cycle control theory, we study process management of logistics customer service performance evaluation from supply chain perspective. On the basis of systematic review of related literature at home and abroad, we propose a process of logistics customer service performance evaluation from supply chain perspective based on PDCA cycle, and in the light of each process control key points are given for the improvement of standard management of performance evaluation process and the performance level of logistics customer service and supply chain. In the performance evaluation scheme design, we put forward logistics customer service performance evaluation method and index system to improve the overall performance of the supply chain. And in the performance evaluation scheme we lay out implementation method of logistics customer services of the chosen procedure based on fuzzy analytic hierarchy process.

  5. Performance Evaluation of MANET in Realistic Environment

    Directory of Open Access Journals (Sweden)

    Shailender Gupta

    2012-07-01

    Full Text Available In order to facilitate communication in Mobile Ad hoc Network (MANET, routing protocols are developed. The performance of these protocols depends upon various factors such as: transmission range, number of nodes deployed and mobility of the nodes. Another factor which affects the performance of MANET routing protocols is the environment in which ad hoc network is deployed. The MANET environment may contain obstacles such as mountains lakes, buildings and river. These obstacles restrict nodes movement but may or may not obstruct the effective transmission range of nodes deployed. This paper is an effort to evaluate the performance of MANET routing protocols in presence of obstacles by designing a simulator in MATLAB-10. To make the situation more realistic obstacle of different shapes, size, number and type were introduced in the simulation region. We found significant impact of the same on the performance of routing protocols

  6. Performance evaluation soil samples utilizing encapsulation technology

    Energy Technology Data Exchange (ETDEWEB)

    Dahlgran, James R.

    1997-12-01

    Performance evaluation soil samples and method of their preparation are described using encapsulation technology to encapsulate analytes which are introduced into a soil matrix for analysis and evaluation by analytical laboratories. Target analytes are mixed in an appropriate solvent at predetermined concentrations. The mixture is emulsified in a solution of polymeric film forming material. The emulsified solution is polymerized to form microcapsules. The microcapsules are recovered, quantitated and introduced into a soil matrix in a predetermined ratio to form soil samples with the desired analyte concentration.

  7. Theory-Based Stakeholder Evaluation

    Science.gov (United States)

    Hansen, Morten Balle; Vedung, Evert

    2010-01-01

    This article introduces a new approach to program theory evaluation called theory-based stakeholder evaluation or the TSE model for short. Most theory-based approaches are program theory driven and some are stakeholder oriented as well. Practically, all of the latter fuse the program perceptions of the various stakeholder groups into one unitary…

  8. Analytical Framework for Performance Evaluation of Research Organizations

    Directory of Open Access Journals (Sweden)

    Nagesh R. Iyer

    2014-07-01

    Full Text Available Performance evaluation is an important measure of the total quality management, which can be used to assess the performance of an individual or an organization with respect to set goals and targets. The metrics/parameters used for evaluating the performance and the way in which these are measured by using appropriate tools and techniques play a major role in the evaluation process. Performance evaluation is even more challenging in the case of R and D organizations, where the outcome/output may not be tangible/measurable and varies from one organization to another, depending on the nature, vision, charter and character. A methodology is proposed to arrive at a framework that can help in objectively assessing or evaluating the performance of each of the laboratories of CSIR (Council of Scientific and Industrial Research based on four knowledge portfolios which are appropriately given weightages according to the impact they have on the four goods viz-Public, Private, Social and Strategic Appropriate parameters have been identified which can help in objectively evaluating the performance of the laboratory. The proposed analytical framework will facilitate quantification of performance of an R and D organization to enable resource allocation in a rational manner.

  9. Semi-quantitative study to evaluate the performance of a HACCP-based food safety management system in Japanese milk processing plants

    NARCIS (Netherlands)

    Sampers, I.; Toyofuku, H.; Luning, P.A.; Uyttendaele, M.; Jacxsens, L.

    2012-01-01

    This study aimed to gain an insight in the performance of Hazard Analysis and Critical Control Points (HACCP)-based food safety management systems (FSMS) implemented in Japanese milk processing plants. Since 1995, Japan has a comprehensive approval system for food manufacturing establishments by eva

  10. A study on relationship between operating cash flows and performance evaluation criteria based on the theory of constraints (TOC versus traditional method

    Directory of Open Access Journals (Sweden)

    Mohammad Sadegh Arabi Ashtiani

    2013-08-01

    Full Text Available This study presents an empirical investigation to measure the relationship between traditional accounting performance measurement as well as theory of constraint-based figures with operating cash flow. Traditional accounting measurement includes net profit and return of investment and theory of constraint method includes net profit and return of investment based on theory of constraints. The study selects 69 firms list on Tehran Stock Exchange over the period 2000-2010. Using panel data and fixed effect, the study performs regression analysis and the results confirm that there was a positive relationship between net profit measured by theory of constraints and cash flow and it can be effectively used for performance measurement.

  11. Performance evaluation of a full line of medical diagnostic displays and test of a web-based service for remote calibration and quality assurance

    Science.gov (United States)

    Busoni, S.; Belli, G.; Taddeucci, A.; Targetti, S.; Menchi, I.; Gori, C.; Capaccioli, L.; Falivene, A.; Spanò, G.; Guasti, A.; Saletti, P.; Rossi, F.

    2009-02-01

    Main goal of this study is to compare the performances of a full line of LCD diagnostic display systems, in terms of white point luminance, accuracy and stability over time, GSDF conformance and luminance uniformity, and to test a web-based service for remote calibration and QA in a large hospital. The display systems under test included 3MP and 5MP grayscale, 2MP and 6MP color and 5MP mammography LCD monitors, all manufactured by BARCO, for a total amount of 119 units. Measured performances were all within the acceptance range proposed by the major international protocols and show a very good stability in time, except for a few cases. The web-based service for remote QA and calibration resulted well suited for the management of a large scale medical facility, where high performance displays are in use and time saving QA programs and a central QA policy are both needed.

  12. Performance evaluation software moving object detection and tracking in videos

    CERN Document Server

    Karasulu, Bahadir

    2013-01-01

    Performance Evaluation Software: Moving Object Detection and Tracking in Videos introduces a software approach for the real-time evaluation and performance comparison of the methods specializing in moving object detection and/or tracking (D&T) in video processing. Digital video content analysis is an important item for multimedia content-based indexing (MCBI), content-based video retrieval (CBVR) and visual surveillance systems. There are some frequently-used generic algorithms for video object D&T in the literature, such as Background Subtraction (BS), Continuously Adaptive Mean-shift (CMS),

  13. Performance management in the Slovak higher education system: preliminary evaluation

    Directory of Open Access Journals (Sweden)

    Juraj Nemec

    2007-10-01

    Full Text Available The aim of our paper is a preliminary evaluation of the introduction of performance management and performance financing arrangements in the Slovak higher education system – accreditation and formula based performance financing. This evaluation will be mainly based on the assessment of short-term impacts of the above mentioned instruments and is expected to invite further professional discussion. We feel that the data and brief analysis included are sufficient enough to show that the Slovak system represents a typical example of the potential of performance management and performance financing being significantly limited, if not destroyed. Not only because of improperly defined indicators, which are too much input and quantity orientated, but very much also due to a lack of resources (the ratio of public expenditures for higher education to the GDP in Slovakia is significantly below EU average, as well as the politicization of the system.

  14. Model Performance Evaluation and Scenario Analysis (MPESA) Tutorial

    Science.gov (United States)

    This tool consists of two parts: model performance evaluation and scenario analysis (MPESA). The model performance evaluation consists of two components: model performance evaluation metrics and model diagnostics. These metrics provides modelers with statistical goodness-of-fit m...

  15. Cage-based performance capture

    CERN Document Server

    Savoye, Yann

    2014-01-01

    Nowadays, highly-detailed animations of live-actor performances are increasingly easier to acquire and 3D Video has reached considerable attentions in visual media production. In this book, we address the problem of extracting or acquiring and then reusing non-rigid parametrization for video-based animations. At first sight, a crucial challenge is to reproduce plausible boneless deformations while preserving global and local captured properties of dynamic surfaces with a limited number of controllable, flexible and reusable parameters. To solve this challenge, we directly rely on a skin-detached dimension reduction thanks to the well-known cage-based paradigm. First, we achieve Scalable Inverse Cage-based Modeling by transposing the inverse kinematics paradigm on surfaces. Thus, we introduce a cage inversion process with user-specified screen-space constraints. Secondly, we convert non-rigid animated surfaces into a sequence of optimal cage parameters via Cage-based Animation Conversion. Building upon this re...

  16. Web-based Projects Evaluation Management System

    Directory of Open Access Journals (Sweden)

    S. Al-Zoubi

    2008-01-01

    Full Text Available This project designs a Web-based evaluation management system for the College of Arts and Sciences (CAS. Problem statement: The Msc students in College of Arts and Sciences (CAS in applied sciences had to take their final project as a project paper in order to fulfill the requirements of their programs and be able to graduate. The final project was evaluated in two parts; first part is representing 40% of the total mark and evaluated by evaluators. Second part was representing 60% of the total mark and evaluated by the student's supervisor. These evaluation were done manually. Both the evaluators and supervisors had to fill in the evaluation forms manually and submit them to the office. Approach: The design research methodology or sometimes called "improvement research" contained the major steps: Awareness the problem, suggestion, development, evaluation and conclusion. Results: Both evaluators and supervisors can fill in the evaluation forms through the Internet. Bring the advantage of saving time and resources over traditional paper and pencil scan sheet method. For enhancing the performance of current final project evaluation process in College of Arts and Sciences (CAS this study proposed a web based evaluation management system to replace the current paper forms used by the evaluators and supervisors. Conclusion: Implementing this system will enable the evaluation results to be entered, presume and retrieved anytime anywhere.

  17. Sensor performance evaluation analysis of imitation fingerprint

    Science.gov (United States)

    Yu, Kyung-hee; Lee, Hyunsuk; Bae, You-suk

    2008-04-01

    The fingerprint recognition is the most developed field in the biometrics recognition and it can apply to the various applications. So the various studies are in progress for an enhancement of fingerprint recognition performance. In this paper, we will study the fingerprint recognition sensor. The fingerprint becomes input using fingerprint sensor to the fingerprint recognition system and the performance of the sensor has an effect on the fingerprint quality. Therefore, the improvement of system performance is possible by improving the performance of sensor. In this paper, we will study sensors which can be protected or unprotected from artificial fingerprint attack. We make various artificial fingerprints, and test sensors to overcome artificial fingerprint attack. We will analyze results of scanning test according to the various sensors and propose the method using the histogram of the normal image in order to measure the performance of these sensors. The measured characteristics are the resolution, shift, gradient, contrast, and rotation. The purpose of this paper is to propose the ways of the performance measurement which can be a criterion to evaluate the sensor performance.

  18. Automated Laser Seeker Performance Evaluation System (ALSPES)

    Science.gov (United States)

    Martin, Randal G.; Robinson, Elisa L.

    1988-01-01

    The Automated Laser Seeker Performance Evaluation System (ALSPES), which supports the Hellfire missile and Copperhead projectile laser seekers, is discussed. The ALSPES capabilities in manual and automatic operation are described, and the ALSPES test hardware is examined, including the computer system, the laser/attenuator, optics systems, seeker test fixture, and the measurement and test equipment. The calibration of laser energy and test signals in ALSPES is considered.

  19. Communication processes, public administration and performance evaluation

    OpenAIRE

    Arta Musaraj

    2011-01-01

    Albanian efforts to fulfill European standards and norm in its Public Administration and service delivery, are becoming a research argument for academics and practitioners as well. Even if significant efforts have been made in this direction there is still a gap in analyzing the link between the communication process which creates and delivers the public service, effect of the used tools in service provision and delivery, the performance evaluation of this sector and the future of the sector ...

  20. Fiscal year 1999 Battelle performance evaluation and fee agreement

    Energy Technology Data Exchange (ETDEWEB)

    DAVIS, T.L.

    1998-10-22

    Fiscal Year 1999 represents the third fill year utilizing a results-oriented, performance-based evaluation for the Contractor's operations and management of the DOE Pacific Northwest National Laboratory (here after referred to as the Laboratory). However, this is the first year that the Contractor's fee is totally performance-based utilizing the same Critical Outcomes. This document describes the critical outcomes, objectives, performance indicators, expected levels of performance, and the basis for the evaluation of the Contractor's performance for the period October 1, 1998 through September 30, 1999, as required by Clauses entitled ''Use of Objective Standards of Performance, Self Assessment and Performance Evaluation'' and ''Performance Measures Review'' of the Contract DE-ACO6-76RL01830. Furthermore, it documents the distribution of the total available performance-based fee and the methodology set for determining the amount of fee earned by the Contractor as stipulated within the causes entitled ''Estimated Cost and Annual Fee,'' ''Total Available Fee'' and ''Allowable Costs and Fee.'' In partnership with the Contractor and other key customers, the Department of Energy (DOE) Headquarters (HQ) and Richland Operations Office (RL) has defined four critical outcomes that serve as the core for the Contractor's performance-based evaluation and fee determination. The Contractor also utilizes these outcomes as a basis for overall management of the Laboratory.

  1. 基于模糊TOPSIS的绿色供应链绩效评价%Green supply chain performance evaluation based on fuzzy TOPSIS

    Institute of Scientific and Technical Information of China (English)

    张毕西; 张明珠; 韩正涛

    2014-01-01

    针对绿色供应链管理问题,建立改进的绿色供应链综合绩效评价体系,运用模糊TOPSIS方法构建模糊加权评价矩阵,计算出了各方案与理想解之间的相对贴近度,从而比较不同方案之间的差别,为供应链绩效的评价提供重要决策依据。实证分析验证了该方法的实用性和有效性。%Aiming at the problem of green supply chain management, an improved comprehensive green supply chain performance evaluation system was established, and the fuzzy TOPSIS method was used to build weighted fuzzy evaluation matrix to calculate the relative closeness degree between the programs and the ideal solution , so as to compare the differences between different solutions, and provide important decision basis for the supply chain performance evaluation. Finally, the empirical analysis verified the practicality and effectiveness of the method.

  2. Performance Evaluation of New Energy Projects Based on EVA%基于EVA的新能源工程项目绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    施金龙; 马旭歌

    2016-01-01

    率先尝试将EVA与新能源工程项目绩效评价相结合,探讨了EVA在新能源工程的实用性。通过剖析新能源工程项目绩效评价体系的现状与缺陷,经理论分析与实证研究后发现:我国新能源工程项目绩效评价体系应吸收EVA指标,且EVA可以转变公司的价值导向,但不能完全取缔传统绩效指标。应结合新能源工程项目的特点,采取EVA与传统绩效指标相结合的方式,同时加强市场监管促进运行机制制度化,以期为新能源工程项目相关人员提供更加准确、客观的财务信息。%To explore the practicability of EVA in new energy projects,this paper takes the lead in combining EVA with performance evaluation of new energy projects. With a series of theoretical and empirical analysis,considering the current situation and defects of the performance evaluation system of the new energy projects,it can be concluded that the performance evaluation system of new energy industry in China should include EVA index. EVA can change the value orientation of the corporation. But traditional performance indicators should be incorporated. In order to provide the related users with more accurate and objective financial information,the characteristics of the new energy project should be taken into consideration. EVA should be combined with traditional performance indicators when evaluatingenterprise's performance. In addition,it is necessary to strengthen market supervision to promote mechanisminstitutionalization.

  3. Preclinical Performance Evaluation of Percutaneous Glucose Biosensors

    Science.gov (United States)

    Soto, Robert J.; Schoenfisch, Mark H.

    2015-01-01

    The utility of continuous glucose monitoring devices remains limited by an obstinate foreign body response (FBR) that degrades the analytical performance of the in vivo sensor. A number of novel materials that resist or delay the FBR have been proposed as outer, tissue-contacting glucose sensor membranes as a strategy to improve sensor accuracy. Traditionally, researchers have examined the ability of a material to minimize the host response by assessing adsorbed cell morphology and tissue histology. However, these techniques do not adequately predict in vivo glucose sensor function, necessitating sensor performance evaluation in a relevant animal model prior to human testing. Herein, the effects of critical experimental parameters, including the animal model and data processing methods, on the reliability and usefulness of preclinical sensor performance data are considered. PMID:26085566

  4. Port operating performance evaluation based on EVA comprehensive scorecard%基于EVA综合计分卡的港口经营业绩评价

    Institute of Scientific and Technical Information of China (English)

    张昕伟; 谢新连

    2011-01-01

    为对我国港口经营业绩进行较为全面的评价,将经济增加值评价方法与平衡计分卡方法相结合,构造EVA综合计分卡评价方法.运用层次分析法对各指标构造两两判断比较矩阵,计算权重向量,并进行实例分析.EVA综合计分卡使港口评价兼顾财务指标与非财务指标,体现港口企业的长期发展能力,可真实反映港口经营状况,为企业决策者提供决策支持.%EVA comprehensive score card evaluation system was constructed combing the evaluation and economic value added method with balanced scorecard method to give a more comprehensive evaluation to our port operating performance.Each index of analytic hierarchy process opposite comparative matrix was constructed,and weight vector was calculated,and example calculation was carried out.It is indicated that EVA comprehensive score card evaluation system considers both financial index and non-financial indicators,and embodies the long-term development ability of the port enterprises,which can really reflect port operation situation,and provide decision support for enterprise decision makers.

  5. Simulation-Based Evaluation of the Performances of an Algorithm for Detecting Abnormal Disease-Related Features in Cattle Mortality Records.

    Science.gov (United States)

    Perrin, Jean-Baptiste; Durand, Benoît; Gay, Emilie; Ducrot, Christian; Hendrikx, Pascal; Calavas, Didier; Hénaux, Viviane

    2015-01-01

    We performed a simulation study to evaluate the performances of an anomaly detection algorithm considered in the frame of an automated surveillance system of cattle mortality. The method consisted in a combination of temporal regression and spatial cluster detection which allows identifying, for a given week, clusters of spatial units showing an excess of deaths in comparison with their own historical fluctuations. First, we simulated 1,000 outbreaks of a disease causing extra deaths in the French cattle population (about 200,000 herds and 20 million cattle) according to a model mimicking the spreading patterns of an infectious disease and injected these disease-related extra deaths in an authentic mortality dataset, spanning from January 2005 to January 2010. Second, we applied our algorithm on each of the 1,000 semi-synthetic datasets to identify clusters of spatial units showing an excess of deaths considering their own historical fluctuations. Third, we verified if the clusters identified by the algorithm did contain simulated extra deaths in order to evaluate the ability of the algorithm to identify unusual mortality clusters caused by an outbreak. Among the 1,000 simulations, the median duration of simulated outbreaks was 8 weeks, with a median number of 5,627 simulated deaths and 441 infected herds. Within the 12-week trial period, 73% of the simulated outbreaks were detected, with a median timeliness of 1 week, and a mean of 1.4 weeks. The proportion of outbreak weeks flagged by an alarm was 61% (i.e. sensitivity) whereas one in three alarms was a true alarm (i.e. positive predictive value). The performances of the detection algorithm were evaluated for alternative combination of epidemiologic parameters. The results of our study confirmed that in certain conditions automated algorithms could help identifying abnormal cattle mortality increases possibly related to unidentified health events.

  6. Simulation-Based Evaluation of the Performances of an Algorithm for Detecting Abnormal Disease-Related Features in Cattle Mortality Records.

    Directory of Open Access Journals (Sweden)

    Jean-Baptiste Perrin

    Full Text Available We performed a simulation study to evaluate the performances of an anomaly detection algorithm considered in the frame of an automated surveillance system of cattle mortality. The method consisted in a combination of temporal regression and spatial cluster detection which allows identifying, for a given week, clusters of spatial units showing an excess of deaths in comparison with their own historical fluctuations. First, we simulated 1,000 outbreaks of a disease causing extra deaths in the French cattle population (about 200,000 herds and 20 million cattle according to a model mimicking the spreading patterns of an infectious disease and injected these disease-related extra deaths in an authentic mortality dataset, spanning from January 2005 to January 2010. Second, we applied our algorithm on each of the 1,000 semi-synthetic datasets to identify clusters of spatial units showing an excess of deaths considering their own historical fluctuations. Third, we verified if the clusters identified by the algorithm did contain simulated extra deaths in order to evaluate the ability of the algorithm to identify unusual mortality clusters caused by an outbreak. Among the 1,000 simulations, the median duration of simulated outbreaks was 8 weeks, with a median number of 5,627 simulated deaths and 441 infected herds. Within the 12-week trial period, 73% of the simulated outbreaks were detected, with a median timeliness of 1 week, and a mean of 1.4 weeks. The proportion of outbreak weeks flagged by an alarm was 61% (i.e. sensitivity whereas one in three alarms was a true alarm (i.e. positive predictive value. The performances of the detection algorithm were evaluated for alternative combination of epidemiologic parameters. The results of our study confirmed that in certain conditions automated algorithms could help identifying abnormal cattle mortality increases possibly related to unidentified health events.

  7. Operator performance evaluation using multi criteria decision making methods

    Science.gov (United States)

    Rani, Ruzanita Mat; Ismail, Wan Rosmanira; Razali, Siti Fatihah

    2014-06-01

    Operator performance evaluation is a very important operation in labor-intensive manufacturing industry because the company's productivity depends on the performance of its operators. The aims of operator performance evaluation are to give feedback to operators on their performance, to increase company's productivity and to identify strengths and weaknesses of each operator. In this paper, six multi criteria decision making methods; Analytical Hierarchy Process (AHP), fuzzy AHP (FAHP), ELECTRE, PROMETHEE II, Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) and VlseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) are used to evaluate the operators' performance and to rank the operators. The performance evaluation is based on six main criteria; competency, experience and skill, teamwork and time punctuality, personal characteristics, capability and outcome. The study was conducted at one of the SME food manufacturing companies in Selangor. From the study, it is found that AHP and FAHP yielded the "outcome" criteria as the most important criteria. The results of operator performance evaluation showed that the same operator is ranked the first using all six methods.

  8. Performance Evaluation of Wavelet Based on Human Visual System%基于人的视觉系统的小波性能评价

    Institute of Scientific and Technical Information of China (English)

    胡海平; 莫玉龙

    2002-01-01

    We have constructed a compactly supported biorthogonal wavelet that approximates the modulation transfer function (MTF) of human visual system in the frequency domain. In this paper, we evaluate performance of the constructed wavelet, and compare it with the widely used Daubechies 9-7, Daubechies 9-3 and GBCW-9-7 wavelets. The result shows that coding performance of the constructed wavelet is better than Daubechies 9-3, and is competitive with Daubechies 9-7 and GBCW-9-7 wavelets. Like Daubechies 9-3wavelet, the filter coefficients of the constructed wavelet are all dyadic fractions, and the tap is less than Daubechies 9-7 and GBCW9-7. It has an attractive feature in the realization of discrete wavelet transform.

  9. A Practical Frame-Work for the Performance Evaluation of Classical Frequency Planning Schemes in OFDM Based on Markov’s Model

    Directory of Open Access Journals (Sweden)

    G. Santhosh Kumar

    2014-01-01

    Full Text Available In this paper, we propose a frame-work for the performance evaluation of frequency allocation schemes in 3G LTE OFDMA systems. We first develop an analytical model for collisions in an OFDMA system for an arbitrary number of users in the different cells. We then calculate the capacity of the system using a Markov model and taking into account the inter-cell interference and its impact on the adaptive modulation. We finally apply this model to compare three frequency allocation schemes, namely reuse 1, reuse 3, and a mix of reuse 1 and 3. Our results show that a mix of reuse 1 and 3 schemes outperforms a reuse 1 scheme in terms of better cell-edge performance, and outperforms also a reuse 3 scheme by achieving an higher cell throughput.

  10. Performance improvement of software component with partial evaluation

    Institute of Scientific and Technical Information of China (English)

    MAO Hong-yan; HUANG Lin-peng; LI Ming-lu

    2008-01-01

    To avoid the complexity and inefficiency for specific applications of the current software architecture, a novel approach using partial evaluation is proposed to improve the running performance of components. The generic program was specialized into domain-specific realization for the known knowledge and environments. The syntax and semantic(adj.) were analyzed based on byte code instruction sequences, and partial evaluation rules depicted how to perform the specialization. The partial evaluation for object-oriented programs was imple-mented. The experimental results show that partial evaluation is effective to speed up the running efficiency. The more generality and scalability can be obtained by the integration of partial evaluation with the favorable de-sign mechanisms and compiler optimization technology.

  11. Experimental Evaluation for the Microvibration Performance of a Segmented PC Method Based High Technology Industrial Facility Using 1/2 Scale Test Models

    Directory of Open Access Journals (Sweden)

    Sijun Kim

    2017-01-01

    Full Text Available The precast concrete (PC method used in the construction process of high technology industrial facilities is limited when applied to those with greater span lengths, due to the transport length restriction (maximum length of 15~16 m in Korea set by traffic laws. In order to resolve this, this study introduces a structural system with a segmented PC system, and a 1/2 scale model with a width of 9000 mm (hereafter Segmented Model is manufactured to evaluate vibration performance. Since a real vibrational environment cannot be reproduced for vibration testing using a scale model, a comparative analysis of their relative performances is conducted in this study. For this purpose, a 1/2 scale model with a width of 7200 mm (hereafter Nonsegmented Model of a high technology industrial facility is additionally prepared using the conventional PC method. By applying the same experiment method for both scale models and comparing the results, the relative vibration performance of the Segmented Model is observed. Through impact testing, the natural frequencies of the two scale models are compared. Also, in order to analyze the estimated response induced by the equipment, the vibration responses due to the exciter are compared. The experimental results show that the Segmented Model exhibits similar or superior performances when compared to the Nonsegmented Model.

  12. Performance evaluation of titanium dioxide based dye-sensitized solar cells under the influence of anodization steps, nanotube length and ionic liquid-free redox electrolyte solvents

    Science.gov (United States)

    Cheong, Y. L.; Beh, K. P.; Yam, F. K.; Hassan, Z.

    2016-06-01

    In this work, highly ordered titanium dioxide (TiO2) nanotube (NT) arrays were synthesized on titanium foil using electrochemical anodization method. The morphological aspects of the nanotubes based on different anodization duration and number of anodization steps (maximum two) have been investigated. The nanotube arrays subsequently used as photoanode in a dye-sensitized solar cell (DSSC) assembly. The studies on the effects of different solvents for triiodide/iodide redox electrolyte and NT length towards the performance of DSSC were conducted. It is known that electrolyte solvent can significantly affect the photovoltaic conversion efficiency. It is noteworthy that longer NT length tends to yield higher efficiency due to better dye adsorption. However, when the NTs exceeded certain length the efficiency decreases instead. Meanwhile, a comparison of DSSC performance based on number of anodization steps on titanium was performed. Highly ordered NT arrays could be obtained using two-steps anodization, which proved to have positive effects on the DSSC performance. The highest photovoltaic conversion efficiency in this work is 2.04%, achieved by two-step anodization. The corresponding average nanotubes length was ˜18 μm, with acetonitrile (ACN) as the redox electrolyte solvent.

  13. 基于PCA的生产企业物流绩效评价%PCA-Based Performance Evaluation of Material Flow in Manufacturing Enterprise

    Institute of Scientific and Technical Information of China (English)

    方永美; 刘伟章; 杨振刚; 陆翠萍

    2011-01-01

    目前我国在物流绩效评价方面的研究大多数集中在第三方物流、供应链物流方面,而生产企业物流方面的研究比较少.拟对生产企业的物流绩效评价进行研究,构建一套符合生产企业物流的绩效评价体系,运用PCA方法对企业内部的物流进行绩效评价,有助于企业降低生产成本,提高服务质量.%There is a large body of research reports on third party logistics and supply chain for inter-enterprises. However, less research attention is paid for material flow in a manufacturing enterprise. The performance evaluation of material flow in an enterprise is addressed in this paper and an evaluation system is developed. It adopts Principal Components Analysis (PCA) to assess the performance. The system is helpful for enterprises to reduce production cost and improve service quality.

  14. Performance and Dependability Evaluation: Successes, Failures and Challenges

    NARCIS (Netherlands)

    Haverkort, Boudewijn R.

    2008-01-01

    Over the last 40 years, the field of model-based performance and dependability evaluation has seen important developments, successes and scientific breakthroughs. However, the field has not matured into a key engineering discipline which is heavily called upon by computer system and software enginee

  15. Performance indicators for the statistical evaluation of digital image classifications

    NARCIS (Netherlands)

    D'Urso, G.; Menenti, M.

    1996-01-01

    A statistical procedure is proposed to evaluate the algorithms for the numerical classification of images. The approach is based on the derivation of performance indicators from measurements of signature separability and thresholding analysis. Although these measurements are not new in image process

  16. Evaluating the financial performance of Companies from the Pharmaceutical Industry

    Directory of Open Access Journals (Sweden)

    BABA Mirela Camelia

    2017-01-01

    Full Text Available The pharmaceutical industry has become a highly competitive environment, which is why performance represents the key element to stay on a market. Evaluating the performance of the economic entities from this sector is of high importance for the management, shareholders, trading partners and creditors. This study focuses on investigating and analyzing the financial statements for 12 drug producing companies in Romania. The analysis is based on data corresponding to the period 2008-2015.

  17. Seismic Performance Evaluation of Concentrically Braced Frames

    Science.gov (United States)

    Hsiao, Po-Chien

    Concentrically braced frames (CBFs) are broadly used as lateral-load resisting systems in buildings throughout the US. In high seismic regions, special concentrically braced frames (SCBFs) where ductility under seismic loading is necessary. Their large elastic stiffness and strength efficiently sustains the seismic demands during smaller, more frequent earthquakes. During large, infrequent earthquakes, SCBFs exhibit highly nonlinear behavior due to brace buckling and yielding and the inelastic behavior induced by secondary deformation of the framing system. These response modes reduce the system demands relative to an elastic system without supplemental damping. In design the re reduced demands are estimated using a response modification coefficient, commonly termed the R factor. The R factor values are important to the seismic performance of a building. Procedures put forth in FEMAP695 developed to R factors through a formalized procedure with the objective of consistent level of collapse potential for all building types. The primary objective of the research was to evaluate the seismic performance of SCBFs. To achieve this goal, an improved model including a proposed gusset plate connection model for SCBFs that permits accurate simulation of inelastic deformations of the brace, gusset plate connections, beams and columns and brace fracture was developed and validated using a large number of experiments. Response history analyses were conducted using the validated model. A series of different story-height SCBF buildings were designed and evaluated. The FEMAP695 method and an alternate procedure were applied to SCBFs and NCBFs. NCBFs are designed without ductile detailing. The evaluation using P695 method shows contrary results to the alternate evaluation procedure and the current knowledge in which short-story SCBF structures are more venerable than taller counterparts and NCBFs are more vulnerable than SCBFs.

  18. Comparative Evaluation of Software Features and Performances.

    Science.gov (United States)

    Cecconi, Daniela

    2016-01-01

    Analysis of two-dimensional gel images is a crucial step for the determination of changes in the protein expression, but at present, it still represents one of the bottlenecks in 2-DE studies. Over the years, different commercial and academic software packages have been developed for the analysis of 2-DE images. Each of these shows different advantageous characteristics in terms of quality of analysis. In this chapter, the characteristics of the different commercial software packages are compared in order to evaluate their main features and performances.

  19. A Proposed RTN Officer Performance Evaluation System

    Science.gov (United States)

    1989-12-01

    Taa& No. WokI Unlit Acca ~def 11¶. TITLE (biclde Securiy ClassifiCation) A PROPOSED ROYAL THAI NAVY OFIICER PERFORM NCE EVALUATION SYSTEM 12. PERSONAL...Ii m -0-w ~~10- 1. - lie p1 - * -- --- trI I. JrI IE1 ... - ... . -- . .. t.J I I I - - r. .. . . ..- - ’gl ! i i - • - . • -- •..--.,J .. .a...opirt 6440W intvn soprirl illiphn. LklenL .win1111110.00 AF Forest 700. AUG 80 COMPANY GRlAVE OFFICESI P1 "flO1MANC6 l~.4 Figure 3,12 U.S. Air Force

  20. The Research on the Academic Performance Evaluation Indicator System Based on Citation Data%基于引文数据的学术绩效评价指标体系研究

    Institute of Scientific and Technical Information of China (English)

    李昌健; 刘伟; 夏绍模; 陶雪莲

    2015-01-01

    简要介绍了学术绩效评价的产生背景,阐述了引文与引文数据的概念以及引文数据在学术绩效评价中的应用,归纳了学术绩效评价中基于引文数据的各类指标及其意义,并详细列举了这些指标的查询数据库。%ABSTRACT:This paper briefly introduces the generation background of academic performance evaluation, expounds the concept of citation and citation data as well as the application of the citation data in academic performance evaluation, summarizes various indicators based on the citation data in the academic performance evaluation and their significance, and lists in detail the source database of these indicators.

  1. Performance Evaluation of MANET Routing Protocols

    Directory of Open Access Journals (Sweden)

    Hrituparna Paul

    2012-07-01

    Full Text Available The task of finding and sustaining routes in Mobile Ad-hoc Networks (MANETS is an important factor in determining the efficiency of any MANET protocol. MANET characteristically is an autonomous system of mobile nodes connected by wireless links without any centralised infrastructure. Absence of fixed infrastructures and host mobility thus network may experience rapid and unpredictable topology changes. Hence, routing is required in order to perform communication among the entire network. There are several routing protocols namely proactive, reactive and hybrid etc. In this paper we will discuss the active research work on these routing protocols and its performance evaluation. To this end, we adopt a simulation approach, which is more suitable to this kind of analysis

  2. Performance evaluation of MPEG internet video coding

    Science.gov (United States)

    Luo, Jiajia; Wang, Ronggang; Fan, Kui; Wang, Zhenyu; Li, Ge; Wang, Wenmin

    2016-09-01

    Internet Video Coding (IVC) has been developed in MPEG by combining well-known existing technology elements and new coding tools with royalty-free declarations. In June 2015, IVC project was approved as ISO/IEC 14496-33 (MPEG- 4 Internet Video Coding). It is believed that this standard can be highly beneficial for video services in the Internet domain. This paper evaluates the objective and subjective performances of IVC by comparing it against Web Video Coding (WVC), Video Coding for Browsers (VCB) and AVC High Profile. Experimental results show that IVC's compression performance is approximately equal to that of the AVC High Profile for typical operational settings, both for streaming and low-delay applications, and is better than WVC and VCB.

  3. Irradiation and performance evaluation of DUPIC fuel

    Energy Technology Data Exchange (ETDEWEB)

    Bae, Ki Kwang; Yang, M. S.; Song, K. C. [and others

    2000-05-01

    The objectives of the project is to establish the performance evaluation system for the experimental verification of DUPIC fuel. The scope and content for successful accomplishment of the phase 1 objectives is established as follows : irradiation test of DUPIC fuel at HANARO using a noninstrument capsule, study on the characteristics of DUPIC pellets, development of the analysis technology on the thermal behaviour of DUPIC fuel, basic design of a instrument capsule. The R and D results of the phase 1 are summarized as follows : - Performance analysis technology development of DUPIC fuel by model development for DUPIC fuel, review on the extendability of code(FEMAXI-IV, FRAPCON-3, ELESTRESS). - Study on physical properties of DUPIC fuel by design and fabrication of the equipment for measuring the thermal property. - HANARO irradiation test of simulated DUPIC fuel by the noninstrument capsule development. - PIE and result analysis.

  4. Evaluating noise performance of the IUCAA sidecar drive electronics controller (ISDEC) based system for TMT on-instrument wavefront sensing (OIWFS) application

    Science.gov (United States)

    Burse, Mahesh; Chattopadhyay, Sabyasachi; Ramaprakash, A. N.; Sinha, Sakya; Prabhudesai, Swapnil; Punnadi, Sujit; Chordia, Pravin; Kohok, Abhay

    2016-07-01

    As a part of a design study for the On-Instrument Low Order Wave-front Sensor (OIWFS) for the TMT Infra-Red Imaging Spectrograph (IRIS), we recently evaluated the noise performance of a detector control system consisting of IUCAA SIDECAR DRIVE ELECRONICS CONTROLLER (ISDEC), SIDECAR ASIC and HAWAII-2RG (H2RG) MUX. To understand and improve the performance of this system to serve as a near infrared wavefront sensor, we implemented new read out modes like multiple regions of interest with differential multi-accumulate readout schemes for the HAWAII-2RG (H2RG) detector. In this system, the firmware running in SIDECAR ASIC programs the detector for ROI readout, reads the detector, processes the detector output and writes the digitized data into its internal memory. ISDEC reads the digitized data from ASIC, performs the differential multi-accumulate operations and then sends the processed data to a PC over a USB interface. A special loopback board was designed and used to measure and reduce the noise from SIDECAR ASIC DC biases2. We were able to reduce the mean r.m.s read noise of this system down to 1-2 e. for any arbitrary window frame of 4x4 size at frame rates below about 200 Hz.

  5. Evaluating cryostat performance for naval applications

    Science.gov (United States)

    Knoll, David; Willen, Dag; Fesmire, James; Johnson, Wesley; Smith, Jonathan; Meneghelli, Barry; Demko, Jonathan; George, Daniel; Fowler, Brian; Huber, Patti

    2012-06-01

    The Navy intends to use High Temperature Superconducting Degaussing (HTSDG) coil systems on future Navy platforms. The Navy Metalworking Center (NMC) is leading a team that is addressing cryostat configuration and manufacturing issues associated with fabricating long lengths of flexible, vacuum-jacketed cryostats that meet Navy shipboard performance requirements. The project includes provisions to evaluate the reliability performance, as well as proofing of fabrication techniques. Navy cryostat performance specifications include less than 1 Wm-1 heat loss, 2 MPa working pressure, and a 25-year vacuum life. Cryostat multilayer insulation (MLI) systems developed on the project have been validated using a standardized cryogenic test facility and implemented on 5-meterlong test samples. Performance data from these test samples, which were characterized using both LN2 boiloff and flow-through measurement techniques, will be presented. NMC is working with an Integrated Project Team consisting of Naval Sea Systems Command, Naval Surface Warfare Center-Carderock Division, Southwire Company, nkt cables, Oak Ridge National Laboratory (ORNL), ASRC Aerospace, and NASA Kennedy Space Center (NASA-KSC) to complete these efforts. Approved for public release; distribution is unlimited. This material is submitted with the understanding that right of reproduction for governmental purposes is reserved for the Office of Naval Research, Arlington, Virginia 22203-1995.

  6. Performance Evaluation of LDA, CCA and AAM

    Directory of Open Access Journals (Sweden)

    M. Jasmine Pemeena Priyadarsini

    2015-03-01

    Full Text Available Wouldn't we love to replace passwords access control to avoid theft, forgotten passwords? Wouldn't we like to enter the security areas just in seconds? Yes the answer is face recognition. In this study we explore and compare the performance of three algorithms namely LDA, CCA, AAM. LDA (an evolution of PCA is a dimensionality reduction technique where it solves the problem of illumination to some extent, maximizing the inter class separation and minimizing the intra class variations. CCA, a measure of linear relationship between two multidimensional variables where it takes the advantage of PCA and LDA for maximizing the correlation and better performance. AAM is a model based approach where it just picks the landmarks of the images for recognition therefore reducing the error rate and producing good performance rate.

  7. Evaluation of the use of performance reference compounds in an oasis-HLB adsorbent based passive sampler for improving water concentration estimates of polar herbicides in freshwater

    Science.gov (United States)

    Mazzella, N.; Lissalde, S.; Moreira, S.; Delmas, F.; Mazellier, P.; Huckins, J.N.

    2010-01-01

    Passive samplers such as the Polar Organic Chemical Integrative Sampler (POCIS) are useful tools for monitoring trace levels of polar organic chemicals in aquatic environments. The use of performance reference compounds (PRC) spiked into the POCIS adsorbent for in situ calibration may improve the semiquantitative nature of water concentration estimates based on this type of sampler. In this work, deuterium labeled atrazine-desisopropyl (DIA-d5) was chosen as PRC because of its relatively high fugacity from Oasis HLB (the POCIS adsorbent used) and our earlier evidence of its isotropic exchange. In situ calibration of POCIS spiked with DIA-d5was performed, and the resulting time-weighted average concentration estimates were compared with similar values from an automatic sampler equipped with Oasis HLB cartridges. Before PRC correction, water concentration estimates based on POCIS data sampling ratesfrom a laboratory calibration exposure were systematically lower than the reference concentrations obtained with the automatic sampler. Use of the DIA-d5 PRC data to correct POCIS sampling rates narrowed differences between corresponding values derived from the two methods. Application of PRCs for in situ calibration seems promising for improving POCIS-derived concentration estimates of polar pesticides. However, careful attention must be paid to the minimization of matrix effects when the quantification is performed by HPLC-ESI-MS/MS. ?? 2010 American Chemical Society.

  8. 13 CFR 306.7 - Performance evaluations of University Centers.

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Performance evaluations of... Development Program § 306.7 Performance evaluations of University Centers. (a) EDA will: (1) Evaluate each... evaluation period. (b) The performance evaluation will determine in part whether a University Center...

  9. 48 CFR 1252.216-72 - Performance evaluation plan.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Performance evaluation....216-72 Performance evaluation plan. As prescribed in (TAR) 48 CFR 1216.406(b), insert the following clause: Performance Evaluation Plan (OCT 1994) (a) A Performance Evaluation Plan shall be...

  10. 48 CFR 436.201 - Evaluation of contractor performance.

    Science.gov (United States)

    2010-10-01

    ... Construction 436.201 Evaluation of contractor performance. Preparation of performance evaluation reports. In addition to the requirements of FAR 36.201, performance evaluation reports shall be prepared for indefinite... of services to be ordered exceeds $500,000.00. For these contracts, performance evaluation...

  11. 40 CFR 35.9055 - Evaluation of recipient performance.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Evaluation of recipient performance. 35... Evaluation of recipient performance. The Regional Administrator will oversee each recipient's performance... schedule for evaluation in the assistance agreement and will evaluate recipient performance and...

  12. Exergy-Economic Criteria for Evaluating Heat Exchanger Performance

    Institute of Scientific and Technical Information of China (English)

    Wu Shuangying; Li Yourong

    2001-01-01

    Based on the exergy-economic analysis of heat exchanger heat transfer and flow process, two new exergyeconomic criteria which are defined as the total costs per unit heat transfer rate ηt t for heat transfer exchanger and the net profit per unit heat recovery rate ηr for heat recovery exchanger respectively are put forward.Furthermore, the application of criteria is illustrated by the evaluation of down-flow, counter-flow and cross-flow heat exchangers performance. The methods employed and results presented in this paper can serve as a guide for the performance evaluation of heat exchangers.

  13. 基于模糊评估的供应链知识管理绩效评价研究%The Research on Performance Evaluation of Supply Chain Knowledge Management Based on Fuzzy Evaluation

    Institute of Scientific and Technical Information of China (English)

    黄青良; 卢祖展; 刘长波

    2013-01-01

    In this paper, on the basis of previous studies, we divide the supply chain knowledge management activities into knowledge creation, knowledge accumulation, inowledge sharing, knowledge utilization and knowledge internalization to construct the supply chain knowledge management performance evaluation system. Setting evaluation index for each management activity, we use AHP and fuzzy evaluation method to evaluate the supply chain knowledge management performance. The paper provides the powerful tool for the supply chain enterprises to evaluate the knowledge management performance and help them manage knowledge effectively.%在前人研究的基础之上,将供应链知识管理活动分为知识创造、知识积累、知识共享、知识利用和知识内化五个方面,构建供应链知识管理绩效的评价体系,并对每一管理活动设置相应的评价指标,运用AHP方法和模糊评估法给出了供应链知识管理绩效评阶的方法,为供应链企业进行有效的知识管理提供有力的工具.

  14. A simplified methd of evaluating the seismic performance of buildings

    Institute of Scientific and Technical Information of China (English)

    Ashutosh Bagchi

    2004-01-01

    This paper presents a simplified method of evaluating the seismic performance of buildings. The proposed method is based on the transformation of a multiple degree of freedom (MDOF) system to an equivalent single degree of freedom (SDOF) system using a simple and intuitive process. The proposed method is intended for evaluating the seismic pertormance of the buildings at the intermediate stages in design, while a rigorous method would be applied to the final design. The performance of the method is evaluated using a series of buildings which are assumed to be located in Victoria in western Canada, and designed based on the upcoming version of the National Building Code of Canada which is due to bc published in 2005. To resist lateral loads, some of these buildings contain reinforced concrete moment resisting frames,while others contain reinforced concrete shear walls. Each building model has been subjected to a set of site-specific seismic spectrum compatible ground motion records, and the response has been determined using the proposed method and the general method for MDOF systems. The results from the study indicate that the proposed method can serve as a useful tool for evaluation of seismic performance of buildings, and carrying out performance based design.

  15. Evaluation of the performance of information theory-based methods and cross-correlation to estimate the functional connectivity in cortical networks.

    Directory of Open Access Journals (Sweden)

    Matteo Garofalo

    Full Text Available Functional connectivity of in vitro neuronal networks was estimated by applying different statistical algorithms on data collected by Micro-Electrode Arrays (MEAs. First we tested these "connectivity methods" on neuronal network models at an increasing level of complexity and evaluated the performance in terms of ROC (Receiver Operating Characteristic and PPC (Positive Precision Curve, a new defined complementary method specifically developed for functional links identification. Then, the algorithms better estimated the actual connectivity of the network models, were used to extract functional connectivity from cultured cortical networks coupled to MEAs. Among the proposed approaches, Transfer Entropy and Joint-Entropy showed the best results suggesting those methods as good candidates to extract functional links in actual neuronal networks from multi-site recordings.

  16. Evaluation of the Performance of Information Theory-Based Methods and Cross-Correlation to Estimate the Functional Connectivity in Cortical Networks

    Science.gov (United States)

    Garofalo, Matteo; Nieus, Thierry; Massobrio, Paolo; Martinoia, Sergio

    2009-01-01

    Functional connectivity of in vitro neuronal networks was estimated by applying different statistical algorithms on data collected by Micro-Electrode Arrays (MEAs). First we tested these “connectivity methods” on neuronal network models at an increasing level of complexity and evaluated the performance in terms of ROC (Receiver Operating Characteristic) and PPC (Positive Precision Curve), a new defined complementary method specifically developed for functional links identification. Then, the algorithms better estimated the actual connectivity of the network models, were used to extract functional connectivity from cultured cortical networks coupled to MEAs. Among the proposed approaches, Transfer Entropy and Joint-Entropy showed the best results suggesting those methods as good candidates to extract functional links in actual neuronal networks from multi-site recordings. PMID:19652720

  17. Study on Performance Evaluation of Equipment Inventory Control Based on ANP%基于ANP的器材库存控制绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    杨学强; 李文俊

    2015-01-01

    In this paper, in view of the practical characteristics of the equipment inventory control, built the index system composing of three aspects, then applied it to the performance evaluation of the equipment inventory control and at the end, used the ANP software Super Decision to solve the corresponding system model, proving the validity of the index system established in this paper.%针对器材库控制实际特点,从库存控制投入、服务水平、库存控制质量三个维度构建了指标体系,运用ANP评价法,对器材库存控制绩效进行综合评价,应用ANP软件Super Decision进行模型求解,结果表明该方法是有效的。

  18. Ground truth and benchmarks for performance evaluation

    Science.gov (United States)

    Takeuchi, Ayako; Shneier, Michael; Hong, Tsai Hong; Chang, Tommy; Scrapper, Christopher; Cheok, Geraldine S.

    2003-09-01

    Progress in algorithm development and transfer of results to practical applications such as military robotics requires the setup of standard tasks, of standard qualitative and quantitative measurements for performance evaluation and validation. Although the evaluation and validation of algorithms have been discussed for over a decade, the research community still faces a lack of well-defined and standardized methodology. The range of fundamental problems include a lack of quantifiable measures of performance, a lack of data from state-of-the-art sensors in calibrated real-world environments, and a lack of facilities for conducting realistic experiments. In this research, we propose three methods for creating ground truth databases and benchmarks using multiple sensors. The databases and benchmarks will provide researchers with high quality data from suites of sensors operating in complex environments representing real problems of great relevance to the development of autonomous driving systems. At NIST, we have prototyped a High Mobility Multi-purpose Wheeled Vehicle (HMMWV) system with a suite of sensors including a Riegl ladar, GDRS ladar, stereo CCD, several color cameras, Global Position System (GPS), Inertial Navigation System (INS), pan/tilt encoders, and odometry . All sensors are calibrated with respect to each other in space and time. This allows a database of features and terrain elevation to be built. Ground truth for each sensor can then be extracted from the database. The main goal of this research is to provide ground truth databases for researchers and engineers to evaluate algorithms for effectiveness, efficiency, reliability, and robustness, thus advancing the development of algorithms.

  19. Evaluating the role of behavioral factors and practical constraints in the performance of an agent-based model of farmer decision making

    DEFF Research Database (Denmark)

    Malawska, Anna Katarzyna; Topping, Christopher John

    2016-01-01

    Farmer decision making models often focus on the behavioral assumptions in the representation of the decision making, applying bounded rationality theory to shift away from the generally criticized profit maximizer approach. Although complex on the behavioral side, such representations are usually...... and pesticide usage using an existing economic farm optimization model. We then gradually modified the model to include practical agronomic constraints and assumptions reflecting bounded rationality, and assessed the explanatory power of the added model components. The assessments were based on comparisons...... of the practical constraints improved the model performance more than the modifications in the behavioral assumptions....

  20. The Comprehensive Comparative Evaluation of Job Performance Based on Topsis Method%基于Topsis法的作业业绩综合比较评价

    Institute of Scientific and Technical Information of China (English)

    狄浩

    2014-01-01

    The role of job cost method is not only for approximate calculation cost, also provides strong support for the job cost management, in order to continuously eliminate waste, achieve continuous improvement and improve customer value, and finally realize enterprises' strategic objectives. This paper takes the basic idea of Topsis method as guidance, analyzes comprehensive comparative evaluation of job performance, takes objective evaluation of enterprise advancement, offers the decision basis for improving enterprise cost management.%作业成本法的作用不仅仅是为了近似精确计算成本,还为作业成本管理提供有力支持,以达到不断消除浪费、实现持续改善、提高客户价值,并最终实现企业战略目标。本文以Topsis法基本思想为指导,分析作业业绩综合比较评价,客观评价企业相关作业的先进性,为改进企业成本管理提供决策依据。

  1. Policy Decomposition for Evaluation Performance Improvement of PDP

    Directory of Open Access Journals (Sweden)

    Fan Deng

    2014-01-01

    Full Text Available In conventional centralized authorization models, the evaluation performance of policy decision point (PDP decreases obviously with the growing numbers of rules embodied in a policy. Aiming to improve the evaluation performance of PDP, a distributed policy evaluation engine called XDPEE is presented. In this engine, the unicity of PDP in the centralized authorization model is changed by increasing the number of PDPs. A policy should be decomposed into multiple subpolicies each with fewer rules by using a decomposition method, which can have the advantage of balancing the cost of subpolicies deployed to each PDP. Policy decomposition is the key problem of the evaluation performance improvement of PDPs. A greedy algorithm with O(nlgn time complexity for policy decomposition is constructed. In experiments, the policy of the LMS, VMS, and ASMS in real applications is decomposed separately into multiple subpolicies based on the greedy algorithm. Policy decomposition guarantees that the cost of subpolicies deployed to each PDP is equal or approximately equal. Experimental results show that (1 the method of policy decomposition improves the evaluation performance of PDPs effectively and that (2 the evaluation time of PDPs reduces with the growing numbers of PDPs.

  2. Blind Source Parameters for Performance Evaluation of Despeckling Filters

    Directory of Open Access Journals (Sweden)

    Nagashettappa Biradar

    2016-01-01

    Full Text Available The speckle noise is inherent to transthoracic echocardiographic images. A standard noise-free reference echocardiographic image does not exist. The evaluation of filters based on the traditional parameters such as peak signal-to-noise ratio, mean square error, and structural similarity index may not reflect the true filter performance on echocardiographic images. Therefore, the performance of despeckling can be evaluated using blind assessment metrics like the speckle suppression index, speckle suppression and mean preservation index (SMPI, and beta metric. The need for noise-free reference image is overcome using these three parameters. This paper presents a comprehensive analysis and evaluation of eleven types of despeckling filters for echocardiographic images in terms of blind and traditional performance parameters along with clinical validation. The noise is effectively suppressed using the logarithmic neighborhood shrinkage (NeighShrink embedded with Stein’s unbiased risk estimation (SURE. The SMPI is three times more effective compared to the wavelet based generalized likelihood estimation approach. The quantitative evaluation and clinical validation reveal that the filters such as the nonlocal mean, posterior sampling based Bayesian estimation, hybrid median, and probabilistic patch based filters are acceptable whereas median, anisotropic diffusion, fuzzy, and Ripplet nonlinear approximation filters have limited applications for echocardiographic images.

  3. CATTLE PRODUCTIVE PERFORMANCE EVALUATION CONFINED SUBMITTED IMMUNOCASTRATION

    Directory of Open Access Journals (Sweden)

    J. M. Maluf

    2016-09-01

    Full Text Available In order to evaluate the performance and carcass characteristics of cattle cross breeds ½ Aberdeen Angus x ½Nelore and Nelore confined submitted to immunocastration 218 male animals were used, feedlot, averaging 342 kg, divided into three experimental groups, T1: 117 steers ½ Angus x ½ Nelore no castrated (ANC, T2: 51 Nelore steers uncastrated (NNC and T3: 50 Nellore steers immunocastrated (NIC. The experiment lasted 144 days of confinement. The selection of animals for group formation was according to the individual weight, breed, sex condition and age. For immunocastration it wasused Bopriva® vaccine. The rating was finished according to the parameter used by the meatpacking industry ranging from 1 to 5. The experimental design was completely randomized in three groups. For the analyzes the variables studied statistics were submitted to analysis of variance (ANOVA and Tukey test both at the 5% level of significance. The results showed differences (p <0.01 at various features of productive performance and carcass between treatments. For slaughter weight, the ANC animals were higher (with 582.1 kg to Nelore, regardless of sexual condition, and the NNC were in turn heavier than the NIC, 527.4 and 503.7 respectively. Finally, it observed that the use of immunocastration in Nellore animals provided a decrease in productive performance of confined animals, but provided better finish carcass similar to crossbred (ANC.

  4. Performance evaluation of a motor-imagery-based EEG-Brain computer interface using a combined cue with heterogeneous training data in BCI-Naive subjects

    Directory of Open Access Journals (Sweden)

    Lee Youngbum

    2011-10-01

    Full Text Available Abstract Background The subjects in EEG-Brain computer interface (BCI system experience difficulties when attempting to obtain the consistent performance of the actual movement by motor imagery alone. It is necessary to find the optimal conditions and stimuli combinations that affect the performance factors of the EEG-BCI system to guarantee equipment safety and trust through the performance evaluation of using motor imagery characteristics that can be utilized in the EEG-BCI testing environment. Methods The experiment was carried out with 10 experienced subjects and 32 naive subjects on an EEG-BCI system. There were 3 experiments: The experienced homogeneous experiment, the naive homogeneous experiment and the naive heterogeneous experiment. Each experiment was compared in terms of the six audio-visual cue combinations and consisted of 50 trials. The EEG data was classified using the least square linear classifier in case of the naive subjects through the common spatial pattern filter. The accuracy was calculated using the training and test data set. The p-value of the accuracy was obtained through the statistical significance test. Results In the case in which a naive subject was trained by a heterogeneous combined cue and tested by a visual cue, the result was not only the highest accuracy (p Conclusions We propose the use of this measuring methodology of a heterogeneous combined cue for training data and a visual cue for test data by the typical EEG-BCI algorithm on the EEG-BCI system to achieve effectiveness in terms of consistence, stability, cost, time, and resources management without the need for a trial and error process.

  5. Analysis and Evaluation of Using a Tuning Inductance on the Performance of Gilbert Cell-Based CMOS Sub-Harmonic Mixer

    Directory of Open Access Journals (Sweden)

    Alireza Saberkari

    2012-03-01

    Full Text Available The effect of using a tuning inductance on the performance of a Gilbert cell-based two level transistor CMOS sub-harmonic mixer is investigated. The tuning inductor used between the RF and LO switching stages causes conversion gain enhancement and noise figure improvement. Additionally, it compensates LO distortion due to the phase mismatch of LO signals in the sub-harmonic mixer. The design procedure is done in 0.18 :m CMOS process at 1.8 V supply voltage and 2.4 GHz frequency and reveals that the mixer has exhibited high performance after a FOM-based comparison, without increase the power consumption of 5 mW. The inductive connection between the RF and LO stages causes 7 dB enhancement of conversion gain and 7.3 and 6 dB improvement of noise figure and LO distortion, respectively while the mixer has achieved up to 8 dB conversion gain, 0.5 dBm IIP3, and 13.8 dB noise figure.

  6. Evaluating the Performance of Wavelet-based Data-driven Models for Multistep-ahead Flood Forecasting in an Urbanized Watershed

    Science.gov (United States)

    Kasaee Roodsari, B.; Chandler, D. G.

    2015-12-01

    A real-time flood forecast system is presented to provide emergency management authorities sufficient lead time to execute plans for evacuation and asset protection in urban watersheds. This study investigates the performance of two hybrid models for real-time flood forecasting at different subcatchments of Ley Creek watershed, a heavily urbanized watershed in the vicinity of Syracuse, New York. Hybrid models include Wavelet-Based Artificial Neural Network (WANN) and Wavelet-Based Adaptive Neuro-Fuzzy Inference System (WANFIS). Both models are developed on the basis of real time stream network sensing. The wavelet approach is applied to decompose the collected water depth timeseries to Approximation and Detail components. The Approximation component is then used as an input to ANN and ANFIS models to forecast water level at lead times of 1 to 10 hours. The performance of WANN and WANFIS models are compared to ANN and ANFIS models for different lead times. Initial results demonstrated greater predictive power of hybrid models.

  7. International Space Station Sustaining Engineering: A Ground-Based Test Bed for Evaluating Integrated Environmental Control and Life Support System and Internal Thermal Control System Flight Performance

    Science.gov (United States)

    Ray, Charles D.; Perry, Jay L.; Callahan, David M.

    2000-01-01

    As the International Space Station's (ISS) various habitable modules are placed in service on orbit, the need to provide for sustaining engineering becomes increasingly important to ensure the proper function of critical onboard systems. Chief among these are the Environmental Control and Life Support System (ECLSS) and the Internal Thermal Control System (ITCS). Without either, life onboard the ISS would prove difficult or nearly impossible. For this reason, a ground-based ECLSS/ITCS hardware performance simulation capability has been developed at NASA's Marshall Space Flight Center. The ECLSS/ITCS Sustaining Engineering Test Bed will be used to assist the ISS Program in resolving hardware anomalies and performing periodic performance assessments. The ISS flight configuration being simulated by the test bed is described as well as ongoing activities related to its preparation for supporting ISS Mission 5A. Growth options for the test facility are presented whereby the current facility may be upgraded to enhance its capability for supporting future station operation well beyond Mission 5A. Test bed capabilities for demonstrating technology improvements of ECLSS hardware are also described.

  8. Performance Evaluation of Four DEM-Based Fluvial Terrace Mapping Methods Across Variable Geomorphic Settings: Application to the Sheepscot River Watershed, Maine

    Science.gov (United States)

    Hopkins, A. J.; Snyder, N. P.

    2014-12-01

    Fluvial terraces are utilized in geomorphic studies as recorders of land-use, climate, and tectonic history. Advances in digital topographic data, such as high-resolution digital elevation models (DEMs) derived from airborne lidar surveys, has promoted the development of several methods used to extract terraces from DEMs based on their characteristic morphology. The post-glacial landscape of the Sheepscot River watershed, Maine, where strath and fill terraces are present and record Pleistocene deglaciation, Holocene eustatic forcing, and Anthropocene land-use change, was selected to implement a comparison between terrace mapping methodologies. At four study sites within the watershed, terraces were manually mapped to facilitate the comparison between fully and semi-automated DEM-based mapping procedures, including: (1) edge detection functions in Matlab, (2) feature classification algorithms developed by Wood (1996), (3) spatial relationships between interpreted terraces and surrounding topography (Walter et al., 2007), and (4) the TerEx terrace mapping toolbox developed by Stout and Belmont (2014). Each method was evaluated based on its accuracy and ease of implementation. The four study sites have varying longitudinal slope (0.1% - 5%), channel width (lidar DEMs.

  9. Game Performance Evaluation in Male Goalball Players

    Directory of Open Access Journals (Sweden)

    Molik Bartosz

    2015-12-01

    Full Text Available Goalball is a Paralympic sport exclusively for athletes who are visually impaired and blind. The aims of this study were twofold: to describe game performance of elite male goalball players based upon the degree of visual impairment, and to determine if game performance was related to anthropometric characteristics of elite male goalball players. The study sample consisted of 44 male goalball athletes. A total of 38 games were recorded during the Summer Paralympic Games in London 2012. Observations were reported using the Game Efficiency Sheet for Goalball. Additional anthropometric measurements included body mass (kg, body height (cm, the arm span (cm and length of the body in the defensive position (cm. The results differentiating both groups showed that the players with total blindness obtained higher means than the players with visual impairment for game indicators such as the sum of defense (p = 0.03 and the sum of good defense (p = 0.04. The players with visual impairment obtained higher results than those with total blindness for attack efficiency (p = 0.04, the sum of penalty defenses (p = 0.01, and fouls (p = 0.01. The study showed that athletes with blindness demonstrated higher game performance in defence. However, athletes with visual impairment presented higher efficiency in offensive actions. The analyses confirmed that body mass, body height, the arm span and length of the body in the defensive position did not differentiate players’ performance at the elite level.

  10. Man versus Machine: Software Training for Surgeons-An Objective Evaluation of Human and Computer-Based Training Tools for Cataract Surgical Performance.

    Science.gov (United States)

    Din, Nizar; Smith, Phillip; Emeriewen, Krisztina; Sharma, Anant; Jones, Simon; Wawrzynski, James; Tang, Hongying; Sullivan, Paul; Caputo, Silvestro; Saleh, George M

    2016-01-01

    This study aimed to address two queries: firstly, the relationship between two cataract surgical feedback tools for training, one human and one software based, and, secondly, evaluating microscope control during phacoemulsification using the software. Videos of surgeons with varying experience were enrolled and independently scored with the validated PhacoTrack motion capture software and the Objective Structured Assessment of Cataract Surgical Skill (OSACCS) human scoring tool. Microscope centration and path length travelled were also evaluated with the PhacoTrack software. Twenty-two videos correlated PhacoTrack motion capture with OSACCS. The PhacoTrack path length, number of movements, and total procedure time were found to have high levels of Spearman's rank correlation of -0.6792619 (p = 0.001), -0.6652021 (p = 0.002), and -0.771529 (p = 0001), respectively, with OSACCS. Sixty-two videos evaluated microscope camera control. Novice surgeons had their camera off the pupil centre at a far greater mean distance (SD) of 6.9 (3.3) mm, compared with experts of 3.6 (1.6) mm (p ≪ 0.05). The expert surgeons maintained good microscope camera control and limited total pupil path length travelled 2512 (1031) mm compared with novices of 4049 (2709) mm (p ≪ 0.05). Good agreement between human and machine quantified measurements of surgical skill exists. Our results demonstrate that surrogate markers for camera control are predictors of surgical skills.

  11. Empirical Evaluation of Diagnostic Algorithm Performance Using a Generic Framework

    Directory of Open Access Journals (Sweden)

    Arjan van Gemund

    2010-01-01

    Full Text Available A variety of rule-based, model-based and datadriven techniques have been proposed for detection and isolation of faults in physical systems. However, there have been few efforts to comparatively analyze the performance of these approaches on the same system under identical conditions. One reason for this was the lack of a standard framework to perform this comparison. In this paper we introduce a framework, called DXF, that provides a common language to represent the system description, sensor data and the fault diagnosis results; a run-time architecture to execute the diagnosis algorithms under identical conditions and collect the diagnosis results; and an evaluation component that can compute performance metrics from the diagnosis results to compare the algorithms. We have used DXF to perform an empirical evaluation of 13 diagnostic algorithms on a hardware testbed (ADAPT at NASA Ames Research Center and on a set of synthetic circuits typically used as benchmarks in the model-based diagnosis community. Based on these empirical data we analyze the performance of each algorithm and suggest directions for future development.

  12. Resarch on the Performance Evaluation Method of ERP Sandbox Course Based on the Improved Triangular FAHP%基于改进的三角FAHP的ERP沙盘课程成绩评价方法研究

    Institute of Scientific and Technical Information of China (English)

    陈群

    2015-01-01

    分析了现有的ERP沙盘课程的成绩评价方法,考虑到决策判断的模糊性,提出基于改进的三角模糊层次分析法进行该课程的成绩评价,解决了当前评价方法在指标权重及权重值确定上的主观性,最后通过算例验证了该方法的有效性。%This article analyze the existing performance Evaluation Method of Enterprise Resource Planning Sandbox Course, considering the fuzziness of the decision, proposing a performance Evaluation Method based on improved triangular fuzzy hierarchy analysis method, solving the subjectivity in the current evaluation methods. Finally, a numerical example is given to verify the validity of this method.

  13. Performance-based inspection and maintenance strategies

    Energy Technology Data Exchange (ETDEWEB)

    Vesely, W.E.

    1995-04-01

    Performance-based inspection and maintenance strategies utilize measures of equipment performance to help guide inspection and maintenance activities. A relevant measure of performance for safety system components is component unavailability. The component unavailability can also be input into a plant risk model such as a Probabilistic Risk Assessment (PRA) to determine the associated plant risk performance. Based on the present and projected unavailability performance, or the present and projected risk performance, the effectiveness of current maintenance activities can be evaluated and this information can be used to plan future maintenance activities. A significant amount of information other than downtimes or failure times is collected or can be collected when an inspection or maintenance is conducted which can be used to estimate the component unavailability. This information generally involves observations on the condition or state of the component or component piecepart. The information can be detailed such as the amount of corrosion buildup or can be general such as the general state of the component described as {open_quotes}high degradation{close_quotes}, {open_quotes}moderate degradation{close_quotes}, or {open_quotes}low degradation{close_quotes}. Much of the information collected in maintenance logs is qualitative and fuzzy. As part of an NRC Research program on performance-based engineering modeling, approaches have been developed to apply Fuzzy Set Theory to information collected on the state of the component to determine the implied component or component piecepart unavailability. Demonstrations of the applications of Fuzzy Set Theory are presented utilizing information from plant maintenance logs. The demonstrations show the power of Fuzzy Set Theory in translating engineering information to reliability and risk implications.

  14. 基于过程管理的高校实验课程成绩考评%Performance Evaluation in University Experimental Courses Based on Process Management

    Institute of Scientific and Technical Information of China (English)

    杨琴

    2011-01-01

    实验课程成绩考评是实验教学的重要内容,在高校实验课程成绩考评过程中引入过程管理的理念,既关注实验结果,更注重实验过程;变事后监督为事前、事中监督。这有利于改变片面注重理论知识与实验结果的取向,而更加重视实验的过程和实验的方法,有助于客观、公正、准确地评价学生学习状况,激发学生学习兴趣,促进实验教学内容、实验方法的改革,提高实验教学质量。%Experimental course grade evaluation is important to experiment teaching practice.The introduction of the concept of process management to the practice of university experimental course grade evaluation does not only concern the experimental results,but also lays more focus on experimental process.In other words,it shifts subsequence supervision to that before and in the event.The measure contributes to altering the idea of one-sided emphasis on theoretical knowledge and experimental results to more attention to the process and method.Furthermore,it helps appraise learning performance objectively,fairly and precisely,stimulate students' interest in learning and promote the reform of teaching content and method,and therefore improve the quality of experiment teaching practice.

  15. 48 CFR 3052.216-72 - Performance evaluation plan.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Performance evaluation... CONTRACT CLAUSES Text of Provisions and Clauses 3052.216-72 Performance evaluation plan. As prescribed in... Evaluation Plan (DEC 2003) (a) A Performance Evaluation Plan shall be unilaterally established by...

  16. 48 CFR 236.201 - Evaluation of contractor performance.

    Science.gov (United States)

    2010-10-01

    ... CONTRACTS Special Aspects of Contracting for Construction 236.201 Evaluation of contractor performance. (a) Preparation of performance evaluation reports. Use DD Form 2626, Performance Evaluation (Construction... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Evaluation of...

  17. Performance Evaluation of Photovoltaic Solar Air Conditioning

    Directory of Open Access Journals (Sweden)

    Snegirjovs A.

    2016-12-01

    Full Text Available Information on the electrical-driven solar air conditioning (SAC is rather scanty. A considerable body of technical data mostly concerns large-scale photo-voltaic solar air conditioning (PV-SAC systems. Reliable information about the energy output has arisen only in recent years; however, it is still not easily accessible, and sometimes its sources are closed. Despite these facts, solar energy researchers, observers and designers devote special attention to this type of SAC systems. In this study, performance evaluation is performed for the PV-SAC technology, in which low-power (up to 15 kWp of cooling power on average systems are used. Such a system contains a PV electric-driven compression chiller with cold and heat sensible thermal storage capacities, and a rejected energy unit used for preheating domestic hot water (DHW. In a non-cooling season, it is possible to partly employ the system in the reverse mode for DHW production. In this mode, the ambient air serves as a heat source. Besides, free cooling is integrated in the PV-SAC concept.

  18. Performance Evaluation of Photovoltaic Solar Air Conditioning

    Science.gov (United States)

    Snegirjovs, A.; Shipkovs, P.; Lebedeva, K.; Kashkarova, G.; Migla, L.; Gantenbein, P.; Omlin, L.

    2016-12-01

    Information on the electrical-driven solar air conditioning (SAC) is rather scanty. A considerable body of technical data mostly concerns large-scale photo-voltaic solar air conditioning (PV-SAC) systems. Reliable information about the energy output has arisen only in recent years; however, it is still not easily accessible, and sometimes its sources are closed. Despite these facts, solar energy researchers, observers and designers devote special attention to this type of SAC systems. In this study, performance evaluation is performed for the PV-SAC technology, in which low-power (up to 15 kWp of cooling power on average) systems are used. Such a system contains a PV electric-driven compression chiller with cold and heat sensible thermal storage capacities, and a rejected energy unit used for preheating domestic hot water (DHW). In a non-cooling season, it is possible to partly employ the system in the reverse mode for DHW production. In this mode, the ambient air serves as a heat source. Besides, free cooling is integrated in the PV-SAC concept.

  19. 服务组合排编规范性能分析研究%Stochastic-petri-net-based approach to modeling and performance evaluation of choreography-based service composition

    Institute of Scientific and Technical Information of China (English)

    刘毅; 薛红超; 夏云霓; 杨骏

    2011-01-01

    伴随Web服务而生的服务组装技术,因能实现服务的复用和增值而成为学术界和工业界关注的焦点.目前主流的服务组合规范可以分为基于编写(orchestration-based规范,如WS-BPEL)和基于排编(choreography-based规范,如WSCI和WS-CDL)两大类.目前对服务组合规范的研究多偏重于功能分析和性质验证的方面,而数量化特性,特别是性能的研究却相对薄弱.运用随机Petri网对基于WSCI规范描述的服务组合进行了建模和性能分析.基于WSCI的组合服务转换为随机Petri网描述,在其基础上导出连续时间马氏过程的状态变迁模型,在马氏过程的转移强度矩阵上进行一系列计算以获得对性能的评价.在实例研究中运用蒙特卡洛实验和置信区间分析的方法,对上一步获得的理论结果进行了检验.%Web service composition refers to the creation of new services by combining functionalities provided by existing ones.Current Web service choreography proposals, such as WSCI,WS-CDL and BPEL, provide notations for describing the message flows in Web service collaborations.The kernel of WSCI consists of simple communication primitives that may be combined using control-flow constructs expressing sequence,branching,parallelism,synchronization,etc.Many efforts have been made on functional formalization and property verification of WSCI-based service compositions.However, performance facet of WSCI-based service composition is yet to be given,the importance it deserves.In this paper,a stochastic-Petri-net-based approach is introduced to predict the performance of Web service choreographed using WSCI.This approach translates WSCI-based composition into general stochastic Petri net and obtains analytical estimation of process-completion-time based on the continuous-time Markov chain derived from the Petri net.In the case study,the Monte-carlo experiments and confidence interval analysis are used to validate theoretical evaluations.

  20. Performance Evaluation Method for Dissimilar Aircraft Designs

    Science.gov (United States)

    Walker, H. J.

    1979-01-01

    A rationale is presented for using the square of the wingspan rather than the wing reference area as a basis for nondimensional comparisons of the aerodynamic and performance characteristics of aircraft that differ substantially in planform and loading. Working relationships are developed and illustrated through application to several categories of aircraft covering a range of Mach numbers from 0.60 to 2.00. For each application, direct comparisons of drag polars, lift-to-drag ratios, and maneuverability are shown for both nondimensional systems. The inaccuracies that may arise in the determination of aerodynamic efficiency based on reference area are noted. Span loading is introduced independently in comparing the combined effects of loading and aerodynamic efficiency on overall performance. Performance comparisons are made for the NACA research aircraft, lifting bodies, century-series fighter aircraft, F-111A aircraft with conventional and supercritical wings, and a group of supersonic aircraft including the B-58 and XB-70 bomber aircraft. An idealized configuration is included in each category to serve as a standard for comparing overall efficiency.

  1. Novel evaluation method of TCP performance over satellite links

    Institute of Scientific and Technical Information of China (English)

    Wang Lina; Gu Xuemai

    2006-01-01

    A novel and efficient method to evaluate the transmission control protocol (TCP) performance over satellite links is presented. A TCP module is divided into three functional blocks, namely data processing, congestion control and error control. The re-established TCP module is easy to update TCP congestion control strategy or error control strategy. With the proposed analysis approach, the interactions between different congestion control and error control mechanisms, as well as the performance of various combination protocols in satellite environments have been investigated. Simulation results obtained through a series of experiments have shown that SNACK-based error control strategy can perform well with any other congestion control strategy. The best performance can be achieved by TCP New Reno congestion control strategy and SNACK-based error control strategy.

  2. EVALUATION OF TYPES OF STRESS COPING MECHANISMS OF INDIVIDUALS PARTICIPATING IN PSYCHOLOGICAL PERFORMANCE CONSULTANCY TRAINING ON FOOTBALL BASED ON VARIOUS PARAMETERS

    Directory of Open Access Journals (Sweden)

    Meriç

    2016-04-01

    Full Text Available This study attempts to analyze the individualways of coping with stress based on various variables. The study group is comprised of people who attended Training for Psychological Performance Counselling in Football held by the Turkish Football Federation. There were 114 participants in total. The “Ways of Coping Scale”, developed by Folkman and Lazarus (1980 and revised and recreated by Şahin and Durak (1995, was employed in this study. Statistical analyses of the data were performed through frequency analysis, Mann-Whitney U analysis, and Kruskal Wallis H analysis via SPSS 15.0. It was seen at the end of the study that the most frequently preferred way of coping with stress is “self-confidence”. It was also seen that the ways of coping with stress significantly differ by gender. The female participants resorted statistically more to the “submissiveness” compared to the male participants while coping with stress (p<0.05. However, no significant difference was detected between the participants in terms of coping with stress by age, profession, and whether they engage in licensed sport activities.

  3. The Construction of the Performance Management Teaching Portfolio Evaluation System

    Institute of Scientific and Technical Information of China (English)

    范华

    2016-01-01

    Two of the evaluation, Teaching Portfolio and Performance Management, have being introduced in this article, in order to lead to the construction of the Performance Management Teaching Portfolio Evaluation System.The Performance Manage-ment Teaching Portfolio Evaluation System has advantages of both Teaching Portfolio and Performance Management. The arti-cle also also has listed the elements and some examples of the Performance Management Teaching Portfolio Evaluation System.

  4. Performance of an algebraic-based PSS

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez, Juan M.; Sanchez, Victor M. [CINVESTAV - Unidad Guadalajara, Av. Cientifica 1145, Col, El Bajio, Zapopan, Jal. (Mexico); Correa, Rosa Elvira [Universidad Nacional de Colombia, Sede Medellin, Colombia (Mexico)

    2011-02-15

    The conventional power system stabilizer (PSS) contributes to the undamped electromechanical oscillations enhancement. This paper explores a PSS, which is based on physical concepts that allow a novel PSS to evaluate its output using simple decision rules. This PSS is formulated in an algebraic way, which eases its assembling and coordination. Results show the conventional and the novel PSS performances to damp out inter-area oscillations in a dynamic equivalent of an actual power grid. The feasibility of the novel PSS is demonstrated through its coordinated operation. It is tested on a real time board to emulate a single-machine infinite-bus (SMIB). (author)

  5. Theoretical fundament modifications performed in the evaluation system at the Internal Medicine ward round performance.

    Directory of Open Access Journals (Sweden)

    Luis Alberto Corona Martínez

    2003-04-01

    Full Text Available The medical clinic department in the medicine school located in Cienfuegos city, Cuba performed modifications to the evaluation system in the subject Internal Medicine during the academic course 1999-2000. The main ideas are shown in this investigation constituting the theoretical backgrounds of the changes performed due to the identified deficiencies found and based on the actual pedagogical concepts and acceptation. It is emphasized on the need that the whole system of evaluation should be pertinent, productive, wide, profound, and conformed by the diversity of instruments, so that its instructive, educative, oriented, motivated, and feedback functions should be accomplished.

  6. Seismic performance evaluation of concrete gravity dams

    Energy Technology Data Exchange (ETDEWEB)

    Yamaguchi, Y.; Sasaki, T.; Kanenawa, K. [Public Works Research Institute, Tsukuba City (Japan); Hall, R.; Yule, D. [United States Army Engineer Research and Development Center, Vicksburg, MS (United States); Matheu, E. [Louisiana State Univ., Baton Rouge, LA (United States); Chudgar, A. [United States Army Corps of Engineers, Washington, DC (United States)

    2004-07-01

    This paper addresses technical issues related to seismic design practices and current evaluation methods in Japan and the United States. Nonlinear analysis procedures can identify the ultimate capacity of existing concrete dams, taking into account the most critical nonlinear phenomena controlling the response. A numerical model of a non-overflow monolith of Koyna Dam, subject to earthquake motion, is used as a case study to compare the different approaches for seismic evaluation of concrete gravity dams currently employed in the two countries. The complexity of nonlinear analysis procedures and the scarcity of appropriate calibration strategies force analysts to frequently interpret results using their own judgment. It was concluded that the influence of the input parameters and ground excitation on the nonlinear dynamic response should be investigated in order to identify the most critical conditions. It was also suggested that methodologies for qualitative damage estimation based on results from linear analyses could be used to develop a systematic assessment tool and reference framework for the adequate interpretation of results. 14 refs., 2 tabs., 13 figs.

  7. Study on Evaluation of Logistics Enterprise Performance Based on Management Effectiveness%基于管理有效性的物流企业绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    杨俊峰

    2014-01-01

    鉴于传统绩效评价的局限性,在建立物流企业绩效评价体系的基础上,通过管理有效性的方法对我国27家物流企业2011-2012年间的数据进行管理绩效的实证分析,根据评价结果使企业认识到管理的差距与不足,同时验证了管理有效性的评价方法是对传统绩效评价的有效补充。%In this paper, in view of the limitation of the traditional performance evaluation methods and on the basis of the establishment of the logistics enterprise performance evaluation system, we analyzed empirically the management performance of 27 Chinese logistics enterprises for the period between 2011 and 2012 and then demonstrated the management effectiveness based evaluation process was a sufficient supplement to the traditional performance evaluation systems.

  8. Explanation Based Generalisation = Partial Evaluation

    NARCIS (Netherlands)

    Harmelen, van F.A.H.; Bundy, A.

    1988-01-01

    We argue that explanation-based generalisation as recently proposed in the machine learning literature is essentially equivalent to partial evaluation, a well known technique in the functional and logic programming literature. We show this equivalence by analysing the definitions and underlying algo

  9. MTA Computer Based Evaluation System.

    Science.gov (United States)

    Brenner, Lisa P.; And Others

    The MTA PLATO-based evaluation system, which has been implemented by a consortium of schools of medical technology, is designed to be general-purpose, modular, data-driven, and interactive, and to accommodate other national and local item banks. The system provides a comprehensive interactive item-banking system in conjunction with online student…

  10. Performance Evaluation of the CloudStack Private Cloud

    Directory of Open Access Journals (Sweden)

    Mumtaz M.Ali AL-Mukhtar

    2014-02-01

    Full Text Available The number of open source cloud platforms is increasing day by day.The features of these platforms vary significantly and this creates a difficulty for cloud consumers to choose the platforms based on their requirments.In this paper we build a private cloud using Cloudstack , a popular open source platform used to built Infrastructure as a Service(IaaS cloud.We presents its architecure and analyze performance of virtual machines initiated and managed by the Cloudstack in terms of CPU usage,memory bandwidth,disk I/O speed and networking performance using suitable benchmarks.Different vitual machine management operations such as add ,delete and live migration are also evaluated .The performance evaluation of Cloudstack can help to determine its suability to be adopted as on premise cloud solution.

  11. Performance Evaluation of CDMA Router for Network-On-Chip

    Directory of Open Access Journals (Sweden)

    Anant W. Hinganikar

    2012-06-01

    Full Text Available This paper presents the performance evaluation of router based on code division multiple access technique (CDMA for Network-on-Chip (NoC. The design is synthesized using Xilinx Virtex4 XC4VLX200 device. The functional behavior is verified using Modelsim XE III 6.2 C. The delay and throughput values are obtained for variable payload sizes. Throughput-Power and Delay-Power characteristics are also verified for NoC.

  12. PERFORMANCE EVALUATION OF MULTICRYPT ENCRYPTION MECHANISM

    Directory of Open Access Journals (Sweden)

    John Prakash Arockiasamy

    2012-01-01

    Full Text Available Multicast communication allows a single message packet to be routed to multiple nodes simultaneously. Membership in a multicast group is dynamic, allowing nodes to enter and leave the multicast session. Besides the benefits, multicast communication presents the challenge of securing the communication. In order to preserve confidentiality the general encryption mechanism used for point to point communications are used. A specific encryption mechanism rather a general one is needed to suit the multicast communication requirements wherein the life time of a secret key is very short and requires a frequent change. Moreover, the next generation wireless networks have very limited resources and need a light weight security mechanism. The proposed cipher, Multicrypt, is similar to the One Time Pad and Hill cipher based on a sub band coding scheme using the principle of Orthogonal Vectors. The proposed cipher is based on the assumption of Computational Diffie Hellman problem and insolvability of Hadamard conjecture. It is designed to have multiple keys to decrypt the message like asymmetric cryptosystem so that a (key compromise of a member would not lead to compromise of the entire system, less computational and communicational overheads, less storage complexity and there is no need for state-full members. This study also presents an extensive security analysis and the performance analysis with RSA, a public key encryption mechanism used to establish session keys. With the help of security analysis the study proves that brute force attack does not compromise the system. Multicrypt cryptosystem has the capability of dynamically adding and revoking members. The performance of Multicrypt is relatively better in terms of key setup time, encryption time, decryption time, encryption throughput and decryption throughput than RSA in the simulated setup. The proposed cipher is also proved to be secure against IND-CPA and IND-CCA attacks.

  13. Management of Human Performance in Offshore Platform Maintenance Based on Fuzzy Comprehensive Evaluation%海洋钻井平台维修中的人因管理

    Institute of Scientific and Technical Information of China (English)

    余建星; 张贵珍; 柴松; 马维林

    2012-01-01

    Shengli oilfield;horizontal well;screen;long life;intelligentWith higher reliability of the offshore production equipment, human reliability becomes more and more important in determining safety in the gas and oil production industry. As a matter of fact,management of human factor in platform maintenance is a significant aspect of human reliability management. Current methods that are aimed at controlling human error in maintenance have two vital disadvantages. On the one hand, they tend to be reactive rather proactive; on the other hand they are qualitative description rather than quantitative assessment. However, a successful plan to manage human factor should not only be able to find out causes of the past accidents and damages but also be able to detect which issue is most likely to lead to future incidents. Therefore, Fuzzy Comprehensive Evaluation, which is semi-qualitative and semi-quantitative, is used in this article. Through a fuzzy assessment of factors that affect maintenance performance, weaknesses and problems of the organization can be recognized, thus helping preventing human error from happening.%人员可靠性越来越成为制约海样钻井平台生产安全的重要因素,海洋平台维修中的人为因素管理是人因可靠性的一个重要方面.目前国内外控制维修中人为差错方法,一方面趋向于被动反应式而不是主动前瞻式的管理;另一方面属于定性评价而非定量分析.选用定性与定量结合的模糊综合评价法,对维修组织各因素的安全性进行评价,找出弱项,以预防维修中人为差错的产生.

  14. Performance Evaluation of Routing Protocols in MANET

    Directory of Open Access Journals (Sweden)

    Smitha Sunny

    2015-01-01

    Full Text Available Mobile Ad-Hoc Network (MANET is an autonomous system that is composed of the mobile nodes which communicates through wireless links without any preexisting infrastructure. MANET is a collection of mobile nodes which can self-organize freely and dynamically into arbitrary and temporary network topologies. Mobile nodes in ad-hoc networks function as a router and can dynamically establish routes among themselves by means of a routing protocol. Routing protocols in mobile ad-hoc network helps node to send and receive packets. Therefore, selection of an appropriate routing protocol is an integral part of establishing a MANET. A suitable and effective routing mechanism helps to extend the successful deployment of mobile ad-hoc networks. An attempt has been made to compare the performance between on-demand reactive routing protocols namely AODV, DSR and proactive routing protocol namely DSDV for Constant Bit Rate (CBR traffic by varying network scope i.e. number of participating nodes as well as by varying the speed. The parameters used for evaluation are Packet delivery ratio (PDR, Normalized routing overhead, Average end to end delay (Delay, Throughput and Average Energy consumption. The simulations are carried out using Network Simulator NS2:34.

  15. Performance Evaluation of an Infrared Thermocouple

    Directory of Open Access Journals (Sweden)

    Te-Ching Shen

    2010-11-01

    Full Text Available The measurement of the leaf temperature of forests or agricultural plants is an important technique for the monitoring of the physiological state of crops. The infrared thermometer is a convenient device due to its fast response and nondestructive measurement technique. Nowadays, a novel infrared thermocouple, developed with the same measurement principle of the infrared thermometer but using a different detector, has been commercialized for non-contact temperature measurement. The performances of two-kinds of infrared thermocouples were evaluated in this study. The standard temperature was maintained by a temperature calibrator and a special black cavity device. The results indicated that both types of infrared thermocouples had good precision. The error distribution ranged from −1.8 °C to 18 °C as the reading values served as the true values. Within the range from 13 °C to 37 °C, the adequate calibration equations were the high-order polynomial equations. Within the narrower range from 20 °C to 35 °C, the adequate equation was a linear equation for one sensor and a two-order polynomial equation for the other sensor. The accuracy of the two kinds of infrared thermocouple was improved by nearly 0.4 °C with the calibration equations. These devices could serve as mobile monitoring tools for in situ and real time routine estimation of leaf temperatures.

  16. Model of service-oriented catering supply chain performance evaluation

    Directory of Open Access Journals (Sweden)

    Juanqiong Gou

    2013-03-01

    Full Text Available Purpose: The aim of this paper is constructing a performance evaluation model for service-oriented catering supply chain. Design/methodology/approach: With the research on the current situation of catering industry, this paper summarized the characters of the catering supply chain, and then presents the service-oriented catering supply chain model based on the platform of logistics and information. At last, the fuzzy AHP method is used to evaluate the performance of service-oriented catering supply chain. Findings: With the analysis of the characteristics of catering supply chain, we construct the performance evaluation model in order to guarantee the food safety, logistics efficiency, price stability and so on. Practical implications: In order to evolve an efficient and effective service supply chain, it can not only used to own enterprise improvement, but also can be used for selecting different customers, to choose a different model of development. Originality/value: This paper has a new definition of service-oriented catering supply chain. And it offers a model to evaluate the performance of this catering supply chain.

  17. 10 CFR 1045.9 - RD classification performance evaluation.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false RD classification performance evaluation. 1045.9 Section... classification performance evaluation. (a) Heads of agencies shall ensure that RD management officials and those... RD or FRD documents shall have their personnel performance evaluated with respect to...

  18. 48 CFR 2452.216-73 - Performance evaluation plan.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Performance evaluation plan... 2452.216-73 Performance evaluation plan. As prescribed in 2416.406(e)(3), insert the following clause in all award fee contracts: Performance Evaluation Plan (AUG 1987) (a) The Government...

  19. 48 CFR 8.406-7 - Contractor Performance Evaluation.

    Science.gov (United States)

    2010-10-01

    ... Performance Evaluation. Ordering activities must prepare an evaluation of contractor performance for each... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Contractor Performance Evaluation. 8.406-7 Section 8.406-7 Federal Acquisition Regulations System FEDERAL ACQUISITION...

  20. 48 CFR 1552.209-76 - Contractor performance evaluations.

    Science.gov (United States)

    2010-10-01

    ... 1552.209-76 Contractor performance evaluations. As prescribed in section 1509.170-1, insert the following clause in all applicable solicitations and contracts. Contractor Performance Evaluations (OCT 2002... compliance with safety standards performance categories if deemed appropriate for the evaluation or...

  1. 40 CFR 35.515 - Evaluation of performance.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Evaluation of performance. 35.515....515 Evaluation of performance. (a) Joint evaluation process. The applicant and the Regional... Administrator's decision under the dispute processes in 40 CFR 31.70. (d) Evaluation reports. The...

  2. 40 CFR 35.115 - Evaluation of performance.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Evaluation of performance. 35.115... Evaluation of performance. (a) Joint evaluation process. The applicant and the Regional Administrator will... requirements for progress reporting under 40 CFR 31.40(b). (b) Elements of the evaluation process....

  3. Activity based costing the performance breakthrough

    CERN Document Server

    Turney, Peter B B

    1996-01-01

    Activity-based costing is a method of measuring the cost and performance of activities, products and customers. It is increasingly being seen as a more accurate method of costing than conventional costing systems, which are being superseded by the fact that automation means that direct material and labour consumption is now a far less accurate means of apportioning overheads. This practical book outlines why conventional cost systems fail, before going on to cover the advantages of activity-based costing, and describing how to put the system in place successfully, and how to apply the lessons learnt quickly. The book takes the reader step-by-step through the various processes involved, from setting up the system, through its operation, to evaluation of the results.

  4. Performance Evaluation of Sonar Equipment Based on Grey-AHP%基于灰色层次分析法的声纳装备性能评估磁

    Institute of Scientific and Technical Information of China (English)

    张朋坤; 胡金华; 袁骏; 张卫

    2015-01-01

    针对声纳装备性能评估中性能指标的不确定性与层次性,在构建声纳装备性能指标体系的基础上,引入了灰色层次分析法(GAHP),给出了具体的评估模型与步骤,并以典型声纳装备为例对模型进行验证,结果表明该方法可以较为准确地反映声纳装备的实际使用情况,能够适用于声纳装备性能的评估。%Aiming at the fuzziness and hierarchy of performance indexes in performance evaluation of sonar equipment , it adopts the grey analytical hierarchy process based on building the scheme performance indexes system of sonar equipment . The concrete processes of the evaluation model are described .And with the typical sonar equipment for example carried on a verification on model ,the result indicates that the model can reflect the actual situation of sonar equipment correctly and can be used in performance evaluation of sonar equipment .

  5. High-Q Wafer Level Package Based on Modified Tri-Layer Anodic Bonding and High Performance Getter and Its Evaluation for Micro Resonant Pressure Sensor.

    Science.gov (United States)

    Wang, Liying; Du, Xiaohui; Wang, Lingyun; Xu, Zhanhao; Zhang, Chenying; Gu, Dandan

    2017-03-16

    In order to achieve and maintain a high quality factor (high-Q) for the micro resonant pressure sensor, this paper presents a new wafer level package by adopting cross-layer anodic bonding technique of the glass/silicon/silica (GSS) stackable structure and integrated Ti getter. A double-layer structure similar to a silicon-on-insulator (SOI) wafer is formed after the resonant layer and the pressure-sensitive layer are bonded by silicon direct bonding (SDB). In order to form good bonding quality between the pressure-sensitive layer and the glass cap layer, the cross-layer anodic bonding technique is proposed for vacuum package by sputtering Aluminum (Al) on the combination wafer of the pressure-sensitive layer and the resonant layer to achieve electrical interconnection. The model and the bonding effect of this technique are discussed. In addition, in order to enhance the performance of titanium (Ti) getter, the prepared and activation parameters of Ti getter under different sputtering conditions are optimized and discussed. Based on the optimized results, the Ti getter (thickness of 300 nm to 500 nm) is also deposited on the inside of the glass groove by magnetron sputtering to maintain stable quality factor (Q). The Q test of the built testing system shows that the number of resonators with a Q value of more than 10,000 accounts for more than 73% of the total. With an interval of 1.5 years, the Q value of the samples remains almost constant. It proves the proposed cross-layer anodic bonding and getter technique can realize high-Q resonant structure for long-term stable operation.

  6. Performances evaluation of different open source

    Directory of Open Access Journals (Sweden)

    Arun Patel

    2016-06-01

    Full Text Available In Open sources DEMs such as SRTM, ASTER and Cartosat-1, various factors affecting the accuracy of satellite based DEM such as errors during data collection, systematic errors and unknown errors that are geographically dependent on terrain conditions cannot be avoided. For these reasons it is very necessary to check and compare the performances and validation of the above mentioned different satellite based DEMs. Accuracy assessment of these DEM has been done using DGPS points. For these points proper interpolation of the surface was developed using different interpolation techniques. For the generation of the surface the first step was converting the satellite based DEMs height into linear interpolation contour maps of 1 m interval. Then came selecting random sample points on the contour line and generating the interpolated surface using different interpolation techniques such as IDW, GPI, RBF, OK and UK, LPI, TR and BI, which are commonly used in geomorphology research. This interpolated surface helps in proper representation of the terrain and was checked under different terrain surfaces. For validation of DGPS points the height was taken for ground control points and standard statistical tests such as ME and RMSE were applied. From above investigation, it is reveals that above mention DEMs which are used for study. Cartosat-1 (30 m data product is better than SRTM (90 m and ASTER (30 m because it had produced low RMSE of 3.49 m without applying the interpolation method. Investigation also reveals after applying the interpolation techniques on this data error can be reduced. In the case of Cartosat-1 and SRTM, low RMSE and ME were produced by the BI method, where Cartosat-1 DEM had an RMSE of 3.36 m with ME of −2.74 m, respectively. But in this case, RMSE and ME of SRTM is 2.73 m and −0.36 m, respectively. BI is designed for image processing and can be used for imagery were a maximum height variation in satellite DEM and terrain

  7. Unsupervised Performance Evaluation of Image Segmentation

    Directory of Open Access Journals (Sweden)

    Chabrier Sebastien

    2006-01-01

    Full Text Available We present in this paper a study of unsupervised evaluation criteria that enable the quantification of the quality of an image segmentation result. These evaluation criteria compute some statistics for each region or class in a segmentation result. Such an evaluation criterion can be useful for different applications: the comparison of segmentation results, the automatic choice of the best fitted parameters of a segmentation method for a given image, or the definition of new segmentation methods by optimization. We first present the state of art of unsupervised evaluation, and then, we compare six unsupervised evaluation criteria. For this comparative study, we use a database composed of 8400 synthetic gray-level images segmented in four different ways. Vinet's measure (correct classification rate is used as an objective criterion to compare the behavior of the different criteria. Finally, we present the experimental results on the segmentation evaluation of a few gray-level natural images.

  8. Evaluation method for the drying performance of enzyme containing formulations

    DEFF Research Database (Denmark)

    Sloth, Jakob; Bach, P.; Jensen, Anker Degn;

    2008-01-01

    A method is presented for fast and cheap evaluation of the performance of enzyme containing formulations in terms of preserving the highest enzyme activity during spray drying. The method is based on modeling the kinetics of the thermal inactivation reaction which occurs during the drying process....... Relevant kinetic parameters are determined from differential scanning calorimeter (DSC) experiments and the model is used to simulate the severity of the inactivation reaction for temperatures and moisture levels relevant for spray drying. After conducting experiments and subsequent simulations...... for a number of different formulations it may be deduced which formulation performs best. This is illustrated by a formulation design study where 4 different enzyme containing formulations are evaluated. The method is validated by comparison to pilot scale spray dryer experiments....

  9. Performance evaluation of advanced industrial SPECT system with diverging collimator.

    Science.gov (United States)

    Park, Jang Guen; Jung, Sung-Hee; Kim, Jong Bum; Moon, Jinho; Yeom, Yeon Soo; Kim, Chan Hyeong

    2014-12-01

    An advanced industrial SPECT system with 12-fold-array diverging collimator was developed for flow visualization in industrial reactors and was discussed in the previous study. The present paper describes performance evaluation of the SPECT system under both static- and dynamic- flow conditions. Under static conditions, the movement of radiotracer inside the test reactor was compared with that of color tracer (blue ink) captured with a high-speed camera. The comparison of the reconstructed images obtained with the radiotracer and the SPECT system showed fairly good agreement with video-frames of the color tracer obtained with the camera. Based on the results of the performance evaluation, it is concluded that the SPECT system is suitable for investigation and visualization of flows in industrial flow reactors.

  10. Performance evaluation of effluent treatment plant for automobile industry

    Energy Technology Data Exchange (ETDEWEB)

    Ansari, Farid [Department of Applied Science and Humanities, PDM College of Engineering, Bahadurgarh (Haryana) (India); Pandey, Yashwant K. [School of Energy and Environmental Studies, Devi Ahilya Vishwavidyalaya, Indore (India); Kumar, P.; Pandey, Priyanka [Department of Environmental Science, Post Graduate College Ghazipur (IN

    2013-07-01

    The automobile industry’s wastewater not only contains high levels of suspended and total solids such as oil, grease, dyestuff, chromium, phosphate in washing products, and coloring, at various stages of manufacturing but also, a significant amount of dissolved organics, resulting in high BOD or COD loads. The study reveals the performance, evaluation and operational aspects of effluent treatment plant and its treatability, rather than the contamination status of the real property. The Results revealed that the treated effluent shows most of the parameters are within permissible limits of Central Pollution Control Board (CPCB), India and based on the site visits, discussion with operation peoples, evaluation of process design, treatment system, existing effluent discharge, results of sample analyzed and found that effluent treatment plant of automobile industry are under performance satisfactory.

  11. 基于灰色系统理论的军队油料节约人员360度绩效评估%360-Degree Performance Evaluation of Military POL-saving Personnel Based on Grey System Theory

    Institute of Scientific and Technical Information of China (English)

    刘训标; 郭继坤; 戴俊; 王红旗

    2013-01-01

    In this paper,based on 360-degree performance evaluation,the performance evaluation indicators system of mili-tary POL-saving personnel is established with 4 level indicators and 16 second indicators from morality,abilities,performance and achievements. The weights of each layer’s indicators are determined based on the theory of AHP. The principle and method of grey system theory are applied to establish a multilevel grey evaluation model,and 360-degree performance evaluation of 5 common POL-saving persons in a certain POL-saving group is obtained. The findings indicate that the method can not only systematically synthe-size“the poor information”provided by each appraiser,but also work out the grey class and order of priority of the persons evaluat-ed. The grey class and corresponding appraisal weight of the indexes can also be obtained,so the goal of 360-degree performance feedback can be achieved well. The study provides a new perspective and method for the performance management of POL-saving personnel.%基于360度绩效评估理论,从德、能、勤、绩4个方面构建了包含4个1级指标和16个2级指标的军队油料节约人员360度绩效评估指标体系。利用层次分析法确定了各评估指标的权重,运用灰色系统理论的原理和方法,构建了多层次灰色评估模型,并对某油料节约小组5位油料节约人员进行了360度绩效评估。案例应用表明,此方法具有系统综合各层评估者提供的“贫信息”的优点,不仅能得出被评估者的灰类及优劣顺序,而且得到了各指标所属灰类和具体的灰色评价权值,使360度绩效较好地实现了绩效反馈的目的。该研究为军队油料节约人员绩效管理工作提供了新的思路和方法。

  12. UNIX-based operating systems robustness evaluation

    Science.gov (United States)

    Chang, Yu-Ming

    1996-01-01

    Robust operating systems are required for reliable computing. Techniques for robustness evaluation of operating systems not only enhance the understanding of the reliability of computer systems, but also provide valuable feed- back to system designers. This thesis presents results from robustness evaluation experiments on five UNIX-based operating systems, which include Digital Equipment's OSF/l, Hewlett Packard's HP-UX, Sun Microsystems' Solaris and SunOS, and Silicon Graphics' IRIX. Three sets of experiments were performed. The methodology for evaluation tested (1) the exception handling mechanism, (2) system resource management, and (3) system capacity under high workload stress. An exception generator was used to evaluate the exception handling mechanism of the operating systems. Results included exit status of the exception generator and the system state. Resource management techniques used by individual operating systems were tested using programs designed to usurp system resources such as physical memory and process slots. Finally, the workload stress testing evaluated the effect of the workload on system performance by running a synthetic workload and recording the response time of local and remote user requests. Moderate to severe performance degradations were observed on the systems under stress.

  13. Solar power plant performance evaluation: simulation and experimental validation

    Science.gov (United States)

    Natsheh, E. M.; Albarbar, A.

    2012-05-01

    In this work the performance of solar power plant is evaluated based on a developed model comprise photovoltaic array, battery storage, controller and converters. The model is implemented using MATLAB/SIMULINK software package. Perturb and observe (P&O) algorithm is used for maximizing the generated power based on maximum power point tracker (MPPT) implementation. The outcome of the developed model are validated and supported by a case study carried out using operational 28.8kW grid-connected solar power plant located in central Manchester. Measurements were taken over 21 month's period; using hourly average irradiance and cell temperature. It was found that system degradation could be clearly monitored by determining the residual (the difference) between the output power predicted by the model and the actual measured power parameters. It was found that the residual exceeded the healthy threshold, 1.7kW, due to heavy snow in Manchester last winter. More important, the developed performance evaluation technique could be adopted to detect any other reasons that may degrade the performance of the P V panels such as shading and dirt. Repeatability and reliability of the developed system performance were validated during this period. Good agreement was achieved between the theoretical simulation and the real time measurement taken the online grid connected solar power plant.

  14. Performance evaluation of local colour invariants

    NARCIS (Netherlands)

    Burghouts, G.J.; Geusebroek, J.M.

    2009-01-01

    In this paper, we compare local colour descriptors to grey-value descriptors. We adopt the evaluation framework of Mikolayzcyk and Schmid. We modify the framework in several ways. We decompose the evaluation framework to the level of local grey-value invariants on which common region descriptors are

  15. A key performance measures for evaluating cold supply chain performance in farm industry

    Directory of Open Access Journals (Sweden)

    Shashi Shashi

    2015-08-01

    Full Text Available The main objective of this study was to develop a set of measures, evaluate their importance and effect in cold supply chain performance. This investigation reviewed previous research works on all the stages of the farm product supply chain. Based on farm product supply chain, 4 measures with 31 metrics were identified and developed to measure the cold supply chain performance. A survey was organized to establish the importance and the effect of identified measures. The 5 point Likert scale questionnaire was distributed among SC academics and practitioners. The observed finding infers that the measurement instrument was substantiating for evaluating cold supply chain performance in farm industry. The new developed metrics will help firms improve the visibility of supply among partners and in better decision making. The investigation was enfolded up through the plan of direction intended for future study.

  16. 基于Lawler-Porter综合激励模型的职业院校教学团队绩效评价%On the Performance Evaluation of Teaching Team in Higher Vocational Colleges Based on Lawler-Porter Model

    Institute of Scientific and Technical Information of China (English)

    徐旦

    2015-01-01

    Lawler-Porter综合激励模型的研究前提、研究范式和研究结论为职业院校教学团队绩效评价的构建及其形成机制提供了较为清晰的理论路径.基于Lawler-Porter综合激励模型的职业院校教学团队绩效评价构建包括:改进绩效评价方法;丰富绩效评价主客体;拓展绩效评价量化指标;形成多元化评价标准.基于Lawler-Porter综合激励模型的职业院校教学团队绩效评价形成机制包括:创设良好的工作环境;建立积极的制度环境;形成紧贴社会需求的专业环境;塑造和谐积极的文化环境.%From the perspective of team members, teaching teams, or vocational schools, the effective evaluation of teaching teams in vocational colleges is an important carrier to promote the development of teachers' professional , encourage teaching teams to serve the community, improve the quality of technical skills training and improve the level of vocational colleges. The research premise, paradigm and conclusions of Lawler-Porter Model provide a clear theoretical path for the construction of teaching team performance evaluation and its formation mechanism in vocational colleges. The construction of performance evaluation of teaching teams in Vocational Colleges based on Lawler-Porter Model includes: improving the performance evaluation method, enriching the subjective and object of performance evaluation, developing the quantitative index of performance evaluation, and forming a diversified evaluation standard. The formation mechanism includes: creating a good working environment, establishing a positive institutional environment, forming a professional environment that is close to the social needs, and creating a harmonious and active cultural environment.

  17. Supply Chain Performance Evaluation: Trends and Challenges

    Directory of Open Access Journals (Sweden)

    Ezutah U. Olugu

    2009-01-01

    Full Text Available Problem statement: In today’s manufacturing world, globalization policies and rejuvenation have created a more intensive competition amongst manufacturers. On the other hand, manufacturers have turned to the option of adopting innovative technologies, process re-engineering and strategies such as efficient supply chain management to achieve a sustainable competitive advantage. Effective supply chain performance measurement has been identified as a key issue towards efficient supply chain management. To explore the extent of research in supply chain performance measurement and establish the gap in knowledge in supply chain performance measurement using fuzzy logic operation. Approach: Literatures in the area of supply chain performance measurement had been extensively reviewed. Both traditional and fuzzy logic approaches to supply chain performance measurement were scrutinized. Further scrutiny was carried out to establish potential research areas in the application of fuzzy logic operations in supply chain performance measurement. Results: The supply chain performance measurement using fuzzy logic operation was identified as a new direction in measuring the uncertainty and ambiguity surrounding supply chain performance measurement. Direction for further studies in the application of fuzzy logic operation in supply chain management and its performance measurement were also identified. Conclusion: Result of this study implied that there is still a gap in knowledge in the area of supply chain performance measurement. This new direction of studies involved extending the existing supply chains to incorporate product recovery after the useful life.

  18. Performance analysis of GYRO: a tool evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Worley, P [Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831-6016 (United States); Candy, J [General Atomics, PO Box 85608, San Diego, CA 92186-5608 (United States); Carrington, L [San Diego Supercomputer Center, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0505 (United States); Huck, K [Computer and Information Science Department, 1202 University of Oregon, Eugene, OR 97403-1202 (United States); Kaiser, T [San Diego Supercomputer Center, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0505 (United States); Mahinthakumar, G [Department of Civil Engineering, North Carolina State University, Raleigh, NC 27695-7908 (United States); Malony, A [Computer and Information Science Department, 1202 University of Oregon, Eugene, OR 97403-1202 (United States); Moore, S [Innovative Computing Laboratory, University of Tennessee, 1122 Volunteer Blvd., Suite 413, Knoxville, TN 37996-3450 (United States); Reed, D [Renaissance Computing Institute, University of North Carolina at Chapel Hill, CB 7583, Carr Building, Chapel Hill, NC 27599-7583 (United States); Roth, P [Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831-6016 (United States); Shan, H [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Shende, S [Computer and Information Science Department, 1202 University of Oregon, Eugene, OR 97403-1202 (United States); Snavely, A [San Diego Supercomputer Center, Univ. of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0505 (United States); Sreepathi, S [Dept. of Computer Science, North Carolina State Univ., Raleigh, NC 27695-7908 (United States); Wolf, F [Innovative Computing Lab., Univ. of Tennessee, 1122 Volunteer Blvd., Suite 413, Knoxville, TN 37996-3450 (United States); Zhang, Y [Renaissance Computing Inst., Univ. of North Carolina at Chapel Hill, CB 7583, Carr Building, Chapel Hill, NC 27599-7583 (United States)

    2005-01-01

    The performance of the Eulerian gyrokinetic-Maxwell solver code GYRO is analyzed on five high performance computing systems. First, a manual approach is taken, using custom scripts to analyze the output of embedded wallclock timers, floating point operation counts collected using hardware performance counters, and traces of user and communication events collected using the profiling interface to Message Passing Interface (MPI) libraries. Parts of the analysis are then repeated or extended using a number of sophisticated performance analysis tools: IPM, KOJAK, SvPablo, TAU, and the PMaC modeling tool suite. The paper briefly discusses what has been discovered via this manual analysis process, what performance analyses are inconvenient or infeasible to attempt manually, and to what extent the tools show promise in accelerating or significantly extending the manual performance analyses.

  19. Performance Analysis of GYRO: A Tool Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Worley, P.; Roth, P.; Candy, J.; Shan, Hongzhang; Mahinthakumar,G.; Sreepathi, S.; Carrington, L.; Kaiser, T.; Snavely, A.; Reed, D.; Zhang, Y.; Huck, K.; Malony, A.; Shende, S.; Moore, S.; Wolf, F.

    2005-06-26

    The performance of the Eulerian gyrokinetic-Maxwell solver code GYRO is analyzed on five high performance computing systems. First, a manual approach is taken, using custom scripts to analyze the output of embedded wall clock timers, floating point operation counts collected using hardware performance counters, and traces of user and communication events collected using the profiling interface to Message Passing Interface (MPI) libraries. Parts of the analysis are then repeated or extended using a number of sophisticated performance analysis tools: IPM, KOJAK, SvPablo, TAU, and the PMaC modeling tool suite. The paper briefly discusses what has been discovered via this manual analysis process, what performance analyses are inconvenient or infeasible to attempt manually, and to what extent the tools show promise in accelerating or significantly extending the manual performance analyses.

  20. Staff Performance Evaluation in Public Organizations

    Directory of Open Access Journals (Sweden)

    Drumea C.

    2014-12-01

    Full Text Available In public Organizations staff performance is difficult to measure in absence of overall quantitative performance indicators. There are also the qualitative indicators that give an overview on staff’s motivation, strive, ability, commitment to values, teamwork. These aspects are even less easy to illustrate, in private and public sectors equally. In both cases, measuring staff performance at work, as well as its input on the global performance of the organization is a difficult task which has in practice different approaches. Subsequently, this paper is discussing the system indicators and performance triggers used in International Organizations UN affiliated, in order to adjust staff classification and benefits to their staff’s performance.

  1. 基于可持续发展理念和AHP的高校绩效评价研究%Research on University Performance Evaluation Based on Sustainable Development Theory and AHP

    Institute of Scientific and Technical Information of China (English)

    姜彤彤

    2011-01-01

    It is useful to allocate higher education resources rationally by evaluating university performance. Firstly, this paper establishes a general performance evaluation system including 4 level indicators and 18 secondary indicators based on sustainable development theory. Secondly, a pair-wise judgments comparison matrix is constructed using AHP method, and in the meanwhile the weight of indexes is computed. Finally, this paper analyzes and evaluates the performance of Finance and Economics universities directly under the administration of Ministry.%为了以绩效为导向合理分配高等教育资源,必须进行高校绩效的综合评价。首先,在可持续发展理念指导下,建立由4个一级指标和18个二级指标组成的高校绩效综合评价指标体系;其次,应用层次分析法构造两两判断矩阵,在层次单排序和总排序基础上计算各指标权重;最后,基于教育部直属财经类高校数据进行实证研究,并对结果加以分析。

  2. 基于平衡记分卡的村级社会管理绩效评估指标体系研究%On the Evaluation Index System of Rural Social Management Performance based on the Balanced Scorecard

    Institute of Scientific and Technical Information of China (English)

    杜伟珊; 肖湘雄

    2013-01-01

    In order to strengthen the effectiveness of village-level social management , social management of village-level performance evaluation index system in-depth investigation and analysis to determine the village's main social management performance evaluation index , based on the balanced scorecard in the innovation , to build the village level of social management performance evaluation index system , and uses AHP method for the quantitative analysis of some indicators.%为了加强村级社会管理实效,对村级社会管理绩效评估指标体系的构建进行了深入调查和分析,确定了村级社会管理绩效评估的主干指标,在创新平衡记分卡的基础上,构建了村级社会管理绩效评估指标体系,并运用AHP法对部分指标进行了定量分析。

  3. Performance Evaluation of 802.11p-Based Ad Hoc Vehicle-to-Vehicle Communications for Usual Applications Under Realistic Urban Mobility

    Directory of Open Access Journals (Sweden)

    Patrick Sondi

    2016-05-01

    Full Text Available In vehicular ad hoc networks, participating vehicles organize themselves in order to support lots of emerging applications. While network infrastructure can be dimensioned correctly in order to provide quality of service support to both vehicle-to-vehicle and vehicle-to-infrastructure communications, there are still many issues to achieve the same performance using only ad hoc vehicle-to-vehicle communications. This paper investigates the performance of such communications for complete applications including their specific packet size, packet acknowledgement mechanisms and quality of service requirements. The simulation experiments are performed using Riverbed (OPNET Modeler on a network topology made of 50 nodes equipped with IEEE 802.11p technology and following realistic trajectories in the streets of Paris at authorized speeds. The results show that almost all application types are well supported, provided that the source and the destination have a direct link. Particularly, it is pointed out that introducing supplementary hops in a communication has more effects on end-to-end delay and loss rate rather than mobility of the nodes. The study also shows that ad hoc reactive routing protocols degrade performance by increasing the delays while proactive ones introduce the same counter performance by increasing the network load with routing traffic. Whatever the routing protocol adopted, the best performance is obtained only while small groups of nodes communicate using at most two-hop routes.

  4. Effects of boiling duration in processing of White Paeony Root on its overall quality evaluated by ultra-high performance liquid chromatography quadrupole/time-of-flight mass spectrometry based metabolomics analysis and high performance liquid chromatography quantification.

    Science.gov (United States)

    Ming, Kong; Xu, Jun; Liu, Huan-Huan; Xu, Jin-Di; Li, Xiu-Yang; Lu, Min; Wang, Chun-Ru; Chen, Hu-Biao; Li, Song-Lin

    2017-01-01

    Boiling processing is commonly used in post-harvest handling of White Paeony Root (WPR), in order to whiten the herbal materials and preserve the bright color, since such WPR is empirically considered to possess a higher quality. The present study was designed to investigate whether and how the boiling processing affects overall quality of WPR. First, an ultra-high performance liquid chromatography quadrupole/time-of-flight mass spectrometry-based metabolomics approach coupled with multivariate statistical analysis was developed to compare the holistic quality of boiled and un-boiled WPR samples. Second, ten major components in WPR samples boiled for different durations were quantitatively determined using high performance liquid chromatography to further explore the effects of boiling time on the holistic quality of WPR, meanwhile the appearance of the processed herbal materials was observed. The results suggested that the boiling processing conspicuously affected the holistic quality of WPR by simultaneously and inconsistently altering the chemical compositions and that short-time boiling processing between 2 and 10 min could both make the WPR bright-colored and improve the contents of major bioactive components, which were not achieved either without boiling or with prolonged boiling. In conclusion, short-term boiling (2-10 min) is recommended for post-harvest handling of WPR.

  5. 可持续发展视阈下企业绩效BSC-AHP-FCE评价研究%The Research on BSC-AHP-FCE Evaluation of Enterprise Performance Based on Sustainable Development

    Institute of Scientific and Technical Information of China (English)

    霍江林; 刘素荣

    2012-01-01

    结合我国企业绩效评价的发展需要,按照可持续发展战略的要求,结合平衡计分卡的四维指导思想,改进平衡计分卡的结构内容,从持续增长财务、相关利益反映、QHSE运营流程、持续创新能力四个维度构建绩效评价指标体系,运用层次分析法确定指标递阶层次结构和权重,构建模糊综合评价模型,分层次进行模糊综合评价,并针对样本企业展开实例应用。%At present, the concept of sustainable development has been integrated into enterprise manage- ment level, but specific performance evaluation still needs to continuously explore. Combined with the needs of enterprise performance evaluation in our country, and reference to previous research, according to the require- ments of the sustainable development strategy, based on BSC(the Balanced Score Card)four-dimensional guiding ideology, improve the structure of Balanced Scorecard, establish performance evaluation index system comprising of the continued growth in financial, related interests reflected, QHSE operational processes and continuous in- novation. And apply AHP to determine the indicators structure and weights, then constuct fuzzy comprehensive evaluation model, proceed hierarchical fuzzy comprehensive evaluation, and an application example analysis.

  6. Evaluating Judicial Performance and Addressing Gender Bias

    Directory of Open Access Journals (Sweden)

    Angela Melville

    2014-12-01

    Full Text Available Elek and Rottman argue that judicial evaluation is often biased against women and minority judges. The need to address bias is important, however often the desire for diversity seems so self-evident as to belie deeper analysis. This paper examines the two main rationales for gender equality on the bench. First, female judges are often considered necessary in order to bring a gendered perspective to judging, however it is argued that this rationale is flawed. Second, an alternative rationale based on equality and legitimacy is offered which avoids gender essentialism. While debates typically focus on these two rationales, a third rationale embraces both difference and equality/legitimacy. The presence of female judges has an important symbolic value which destabilises existing fraternal legal norms. Finally, increasing the number of female judges may not necessarily change judging, and this paper also analyses how the transformative potential offered by judicial diversity can work in practice. Elek y Rottman defienden que la evaluación judicial suele estar sesgada en contra de las mujeres y los jueces pertenecientes a minorías. La necesidad de abordar el sesgo es importante, sin embargo a menudo el deseo de diversidad parece tan evidente como para contradecir un análisis más profundo. Este artículo examina los dos motivos principales para la igualdad de género en el banquillo. En primer lugar, las mujeres jueces a menudo se consideran necesarias para aportar una perspectiva de género al hecho de juzgar, sin embargo, se defiende que este razonamiento es erróneo. En segundo lugar, se ofrece una alternativa lógica basada en la igualdad y la legitimidad que evita el esencialismo de género. Mientras que los debates suelen centrarse en estas dos razones, una tercera justificación abarca tanto la diferencia como la igualdad/legitimidad. La presencia de mujeres en la judicatura tiene un importante valor simbólico que desestabiliza las normas

  7. 挣时管理:一种基于挣值的项目进度绩效评价方法%Earned time:a new optimal method of project schedule performance evaluation based on earned value

    Institute of Scientific and Technical Information of China (English)

    郭文静; 周晓宏

    2014-01-01

    The Earned Value Management methodology is a very important and systematic technique that evaluates project performance.This paper studies the disadvantages and limitations of traditional earned value method while evaluating the project Schedule Performance from the application point of view based on the introduction of the traditional earned value management method,and puts forward a performance evaluation method called Earned Time method.It corrects the deviation from traditional earned value method when evaluating the project Schedule Performance,and all the information needed comes form the traditional earned value management.%挣值管理方法是现代项目管理中评价项目绩效的一个非常重要的系统方法。本文在对传统挣值管理方法简要介绍基础上,从实际应用角度就传统挣值管理方法在项目进度绩效评价方面存在的不足和局限进行分析,提出了一种基于时间进度的进度绩效评价方法-挣时分析法。该方法能够改进传统挣值法在进度评价方面的偏差,而且该方法所有信息都来自传统挣值分析,不需要增加额外的信息。

  8. Performance evaluation of enterprise architecture using fuzzy sequence diagram

    Directory of Open Access Journals (Sweden)

    Mohammad Atasheneh

    2014-01-01

    Full Text Available Developing an Enterprise Architecture is a complex task and to control the complexity of the regulatory framework we need to measure the relative performance of one system against other available systems. On the other hand, enterprise architecture cannot be organized without the use of a logical structure. The framework provides a logical structure for classifying architectural output. Among the common architectural framework, the C4ISR framework and methodology of the product is one of the most popular techniques. In this paper, given the existing uncertainties in system development and information systems, a new version of UML called Fuzzy-UML is proposed for enterprise architecture development based on fuzzy Petri nets. In addition, the performance of the system is also evaluated based on Fuzzy sequence diagram.

  9. Evaluation of Mosix—Linux Farm Performances in GRID Environment

    Institute of Scientific and Technical Information of China (English)

    F.Barone; M.DERose; 等

    2001-01-01

    The MOSIX extensions to the Linux Operating System allow the creation of high-performance Linux Farms and an excellent integration of the several CPUs of the Farm,whose computational power can be furtherly inereased and made more effective by netorking them within the GRID environment .Following this strategy,we started to perform computational tests using two independent farrms within the GRID environment.In particular,we performed a preliminary evaluation of the distributed computing efficiency with a MOSIX Linux farm in the simulation of gravitational waves data analysis from coalescing binaries.To this task,two different techniques were compared.the classical matched filters technique and one of its possible evolutions,based on a global optimisation technique.

  10. EVALUATION OF HOTEL SERVICE-PERFORMANCE PROCESS IN BULGARIA

    Directory of Open Access Journals (Sweden)

    Georgina Lukanova

    2010-06-01

    Full Text Available The paper analyses the hotel service-performance process in Bulgarian hotels, which is based on the results of the research about tourists’ opinion on basic moments in service process. One of the most important characteristics of hotel industry is the leading role of the human factor in service-performance process. It cannot be accomplished without the participation of the customer and without the participation of the staff.This makes the evaluation of service process strongly subjective. Because of this, customer needs satisfaction is a big challenge for the hotel management. Under the present conditions of an increased competition, satisfying customers means offering service-performance process, which not only meets, but also exceeds guests’expectations. This can be achieved by a preliminary study of their requirements and expectations.

  11. ECG compression: evaluation of FFT, DCT, and WT performance.

    Science.gov (United States)

    GholamHosseini, H; Nazeran, H; Moran, B

    1998-12-01

    This work investigates a set of ECG data compression schemes to compare their performances in compressing and preparing ECG signals for automatic cardiac arrhythmia classification. These schemes are based on transform methods such as fast Fourier transform (FFT), discrete cosine transform (DCT), wavelet transform (WT), and their combinations. Each specific transform is applied to a pre-selected data segment from the MIT-BIH database and then compression is performed in the new domain. These transformation methods are known as an important class of ECG compression techniques. The WT has been shown as the most efficient method for further improvement. A compression ratio of 7.98 to 1 has been achieved with a percent of root mean square difference (PRD) of 0.25%, indicating that the wavelet compression technique offers the best performance over the other evaluated methods.

  12. 基于平衡记分卡的村集体组织绩效评价可行性分析%Feasibility Analysis on Performance Evaluation of Rural Collective Organizations Based on Balanced Score Card

    Institute of Scientific and Technical Information of China (English)

    冯江涛

    2011-01-01

    结合平衡记分卡及村集体组织的特征,从3个方面对平衡记分卡应用于村集体组织绩效评价进行了可行性分析,并指出了其应用中的两个关键注意点.%Combining with the characteristics of balanced score card and rural collective organizations, the paper took feasibility analysis on the performance evaluation of rural collective organizations based on balanced score card from 3 aspects, and pointed out two key attention points in its application.

  13. 48 CFR 1536.201 - Evaluation of contracting performance.

    Science.gov (United States)

    2010-10-01

    ... Contracting for Construction 1536.201 Evaluation of contracting performance. (a) The Contracting Officer will... will file the form in the contractor performance evaluation files which it maintains. (e) The Quality... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Evaluation of...

  14. 48 CFR 36.201 - Evaluation of contractor performance.

    Science.gov (United States)

    2010-10-01

    ... Contracting for Construction 36.201 Evaluation of contractor performance. See 42.1502(e) for the requirements for preparing past performance evaluations for construction contracts. ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Evaluation of...

  15. 48 CFR 2936.201 - Evaluation of contractor performance.

    Science.gov (United States)

    2010-10-01

    ... Construction 2936.201 Evaluation of contractor performance. The HCA must establish procedures to evaluate... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Evaluation of contractor performance. 2936.201 Section 2936.201 Federal Acquisition Regulations System DEPARTMENT OF LABOR...

  16. Cognitive performance modeling based on general systems performance theory.

    Science.gov (United States)

    Kondraske, George V

    2010-01-01

    General Systems Performance Theory (GSPT) was initially motivated by problems associated with quantifying different aspects of human performance. It has proved to be invaluable for measurement development and understanding quantitative relationships between human subsystem capacities and performance in complex tasks. It is now desired to bring focus to the application of GSPT to modeling of cognitive system performance. Previous studies involving two complex tasks (i.e., driving and performing laparoscopic surgery) and incorporating measures that are clearly related to cognitive performance (information processing speed and short-term memory capacity) were revisited. A GSPT-derived method of task analysis and performance prediction termed Nonlinear Causal Resource Analysis (NCRA) was employed to determine the demand on basic cognitive performance resources required to support different levels of complex task performance. This approach is presented as a means to determine a cognitive workload profile and the subsequent computation of a single number measure of cognitive workload (CW). Computation of CW may be a viable alternative to measuring it. Various possible "more basic" performance resources that contribute to cognitive system performance are discussed. It is concluded from this preliminary exploration that a GSPT-based approach can contribute to defining cognitive performance models that are useful for both individual subjects and specific groups (e.g., military pilots).

  17. Performance-Based Services Acquisition

    Science.gov (United States)

    2011-02-01

    Nonetheless, it is clear that contracting will continue to play an important role in the DoD even after the U.S. military presence is reduced in Iraq and...13 R.C., Jr. 2006). PBSA became the latest term for outcomes-based contracting after the issuance of the Office of Federal Procurement Policy’s...demand through two phenomena known as the whiplash effect and supply push. Currently, the system has high and rising maintenance costs, long

  18. 基于熵权灰靶理论的港口物流绩效评价%A Port Logistics Performance Evaluation Based on Entropy Gray Target Theory

    Institute of Scientific and Technical Information of China (English)

    黄永燊; 蒋恵园

    2015-01-01

    为了弥补传统物流绩效评价方法只给出综合评价值的不足,在构建港口物流绩效评价指标体系的基础上,结合熵值法和灰靶理论建立了熵权灰靶理论模型,运用该模型对港口物流绩效水平进行实证分析。研究结果表明:2011年上海港物流绩效水平最优,其次是天津港、青岛港、宁波港、广州港和大连港,熵权灰靶理论用于港口物流绩效评价是切实可行的。该理论在丰富港口物流绩效评价方法的同时,为今后提高港口物流服务水平提供相应的参考依据。%In order to make up for the shortcomings that traditional logistics evaluation method only gives the comprehensive evaluation value, after constructing the port logistics performance evaluation index sys-tem, an entropy gray target theory model is established based on gray target theory and entropy method.An empirical analysis of port logistics performance level is conducted by using this model.The results show that Shanghai Port logistics performance level is optimal in 2011, followed by Tianjin Port, Qingdao Port, Ningbo Port, Guangzhou Port and Dalian Port, and the entropy gray target theory is feasible in port logis-tics performance evaluation.This theory not only enriches the port logistics performance evaluation meth-ods, but also provides corresponding reference to improving the port logistics performance level in the fu-ture.

  19. Key performance indicators and companies logistic strategy evaluation

    OpenAIRE

    Galyna Tarasiuk; Oleg Rudkivskyi; Оlga Pohaydak

    2013-01-01

    In the article are proposed key performance indicators in company’s logistic strategy evaluation; defined a need to develop key performance indicators in company’s logistic strategy evaluation; disclosed the features of using key performance indicators in company’s logistic activity; proposed stages of key performance indicators system implementation in company’s logistic system; proposed use key performance indicators in accordance with the specific company’s logistic strategy (cost-oriented...

  20. Style Analysis and Performance Evaluation of Dutch Mutual Funds

    NARCIS (Netherlands)

    Ter Horst, J.R.; Nijman, T.E.; de Roon, F.A.

    1998-01-01

    In this paper we show how style analysis of mutual funds can be used to circumvent the problem of self-reported investment styles, and to improve relative performance evaluation. Subsequently, we relate style analysis to performance evaluation and present results on the performance of Dutch mutual f

  1. Performance Evaluation of DOA Estimation using MATLAB

    OpenAIRE

    Balabadrapatruni, Sai Suhas

    2012-01-01

    This paper presents the performance analysis of directions of arrival estimation techniques, Subspace and the Non-Subspace methods. In this paper, exploring the analysis category of high resolution and super resolution algorithms, presentation of description, comparison and the performance and resolution analyses of these algorithms are made. Sensitivity to various perturbations and the effect of parameters related to the design of the sensor array itself such as the number of array elements ...

  2. Performance Evaluation of Biometric Template Update

    CERN Document Server

    Giot, Romain; Dorizzi, Bernadette

    2012-01-01

    Template update allows to modify the biometric reference of a user while he uses the biometric system. With such kind of mechanism we expect the biometric system uses always an up to date representation of the user, by capturing his intra-class (temporary or permanent) variability. Although several studies exist in the literature, there is no commonly adopted evaluation scheme. This does not ease the comparison of the different systems of the literature. In this paper, we show that using different evaluation procedures can lead in different, and contradictory, interpretations of the results. We use a keystroke dynamics (which is a modality suffering of template ageing quickly) template update system on a dataset consisting of height different sessions to illustrate this point. Even if we do not answer to this problematic, it shows that it is necessary to normalize the template update evaluation procedures.

  3. Fiscal year 1998 Battelle performance evaluation agreement revision 1

    Energy Technology Data Exchange (ETDEWEB)

    DAVIS, T.L.

    1998-10-22

    Fiscal Year 1998 represents the second full year utilizing a results-oriented, performance-based contract. This document describes the critical outcomes, objectives, performance indicators, expected levels of performance, and the basis for the evaluation of the Contractors performance for the period October 1, 1997 through September 30, 1998, as required by Articles entitled Use of Objective Standards of Performance, Self Assessment and Performance Evaluation and Critical Outcomes Review of the Contract DE-AC08-76RLO1830. In partnership with the Contractor and other key customers, the Department of Energy (DOE) Richland Operations Office has defined six critical outcomes that same as the core for the Contractors performance evaluation. The Contractor also utilizes these outcomes as a basis for overall management of the Laboratory. As stated above six critical outcomes have been established for FY 1998. These outcomes are based on the following needs identified by DOE-HQ, RL and other customers of the Laboratory. Our Energy Research customer desires relevant, quality and cost effective science. Our Environmental Management customer wants technology developed, demonstrated, and deployed to solve environmental cleanup issues. To ensure the diversification and viability of the Laboratory as a National asset, RL and HQ alike want to increase the Science and Technical contributions of PNNL related to its core capabilities. RL wants improved leadership/management, cost-effective operations, and maintenance of a work environment, which fosters innovative thinking and high morale. RL and HQ alike desire compliance with environment, safety and health (ES and H) standards and disciplined conduct of operations for protection of the worker, environment, and the public, As with all of Hanford, DOE expects contribution of the Laboratory to the economic development of the Tri-Cities community, and the region, to build a new local economy that is less reliant on the Hanford mission

  4. Quantitative and chemical fingerprint analysis for the quality evaluation of Isatis indigotica based on ultra-performance liquid chromatography with photodiode array detector combined with chemometric methods.

    Science.gov (United States)

    Shi, Yan-Hong; Xie, Zhi-Yong; Wang, Rui; Huang, Shan-Jun; Li, Yi-Ming; Wang, Zheng-Tao

    2012-01-01

    A simple and reliable method of ultra-performance liquid chromatography with photodiode array detector (UPLC-PDA) was developed to control the quality of Radix Isatidis (dried root of Isatis indigotica) for chemical fingerprint analysis and quantitative analysis of eight bioactive constituents, including R,S-goitrin, progoitrin, epiprogoitrin, gluconapin, adenosine, uridine, guanosine, and hypoxanthine. In quantitative analysis, the eight components showed good regression (R > 0.9997) within test ranges, and the recovery method ranged from 99.5% to 103.0%. The UPLC fingerprints of the Radix Isatidis samples were compared by performing chemometric procedures, including similarity analysis, hierarchical clustering analysis, and principal component analysis. The chemometric procedures classified Radix Isatidis and its finished products such that all samples could be successfully grouped according to crude herbs, prepared slices, and adulterant Baphicacanthis cusiae Rhizoma et Radix. The combination of quantitative and chromatographic fingerprint analysis can be used for the quality assessment of Radix Isatidis and its finished products.

  5. Techno-economic performance evaluation of direct steam generation solar tower plants with thermal energy storage systems based on high-temperature concrete and encapsulated phase change materials

    Science.gov (United States)

    Guédez, R.; Arnaudo, M.; Topel, M.; Zanino, R.; Hassar, Z.; Laumert, B.

    2016-05-01

    Nowadays, direct steam generation concentrated solar tower plants suffer from the absence of a cost-effective thermal energy storage integration. In this study, the prefeasibility of a combined sensible and latent thermal energy storage configuration has been performed from thermodynamic and economic standpoints as a potential storage option. The main advantage of such concept with respect to only sensible or only latent choices is related to the possibility to minimize the thermal losses during system charge and discharge processes by reducing the temperature and pressure drops occurring all along the heat transfer process. Thermodynamic models, heat transfer models, plant integration and control strategies for both a pressurized tank filled with sphere-encapsulated salts and high temperature concrete storage blocks were developed within KTH in-house tool DYESOPT for power plant performance modeling. Once implemented, cross-validated and integrated the new storage model in an existing DYESOPT power plant layout, a sensitivity analysis with regards of storage, solar field and power block sizes was performed to determine the potential impact of integrating the proposed concept. Even for a storage cost figure of 50 USD/kWh, it was found that the integration of the proposed storage configuration can enhance the performance of the power plants by augmenting its availability and reducing its levelized cost of electricity. As expected, it was also found that the benefits are greater for the cases of smaller power block sizes. Specifically, for a power block of 80 MWe a reduction in levelized electricity costs of 8% was estimated together with an increase in capacity factor by 30%, whereas for a power block of 126 MWe the benefits found were a 1.5% cost reduction and 16% availability increase.

  6. 基于成本收益法的高校图书馆数字资源绩效评估%Research on University Library ’s Digital Resources Performance Evaluation Based on Cost Benefit Method

    Institute of Scientific and Technical Information of China (English)

    浮肖肖

    2015-01-01

    This paper discusses university library’s digital resources performance evaluation based on cost benefit method from five aspects of the benefit index system, the cost index system, the determination of evaluation index weight, the quantization of digital resource digital resources of university library index, and the comparative analysis of digital resource’s cost and benefit.%从收益指标体系、成本指标体系、评价指标权重的确定、数字资源指标量化、数字资源成本与收益的比较分析5个方面,论述了基于成本收益法的高校图书馆数字资源绩效评估。

  7. An evaluation method of organizational performance based on the comparative advantage and empirical research%基于比较优势的组织绩效评价方法及实证研究

    Institute of Scientific and Technical Information of China (English)

    贾建锋; 赵希男; 孙世敏

    2011-01-01

    本文按照目标规划的思想,依据q-范数距离,从最有利于被评价者的角度确定其权重系数.提出了一种基于比较优势的组织绩效评价方法.在此基础上,本文从现有赢利能力、市场对未来赢利能力的预期、风险度、成长性与短期偿债能力五个维度构建了绩效评价的指标体系,以50家上市公司作为研究样本,采用本文提出的基于比较优势的组织绩效评价方法进行了实证研究.研究发现:首先,不同上市公司在绩效评价各维度上的表现是不同的,这体现了它们各自的比较优势;其次,分别站在每家样本企业的角度对50家样本企业的绩效进行了排序,使之找了自己学习的标杆;最后,在汇集所有参评对象意见的基础上,获得了50家上市公司比较优势排序的综合结论.%In accordance with the idea of goal programming and q - norm distance, an evaluation method of organizational performance based on comparative advantage is put forward, and the weights are determined from the angle propitious to the evaluated themselves. On this basis, the index system of performance evaluation is built from five dimensions, i.e. current profitability, market expectations of future profitability, risk, growth, and short - term solvency. According to the method mentioned above, an empirical research on 50 listed companies' performance is carried out. The conclusions are as follows: firstly, the performance of listed companies in different dimensions is different, which reflects their respectively comparative advantage; secondly, the evaluation results from the view of 50 listed companies, which is favorable for listed companies to find their benchmark are obtained; thirdly, the ranking lists of comparative advantage for 50 listed companies are acquired based on collecting ali the views of the object being evaluated.

  8. Performance Evaluation of Balanced Pension Plans

    NARCIS (Netherlands)

    L. Andreu (Laura); L.A.P. Swinkels (Laurens)

    2009-01-01

    textabstractThis paper examines the ability of balanced pension plan managers to successfully time the equity and bond market and select the appropriate assets within these markets. In order to evaluate both market timing abilities in these balanced pension plans, we extend the traditional equity ma

  9. Performance Evaluation of Tree Object Matching

    DEFF Research Database (Denmark)

    Somchaipeng, Kerawit; Sporring, Jon; Kreiborg, Sven;

    2005-01-01

    Multi-Scale Singularity Trees (MSSTs) represents the deep structure of images in scale-space and provide both the connections between image features at different scales and their strengths. In this report we present and evaluate an algorithm that exploits the MSSTs for image matching. Two version...

  10. Subjective performance evaluations and employee careers

    DEFF Research Database (Denmark)

    Frederiksen, Anders; Lange, Fabian; Kriechel, Ben

    such data are for evaluating theories in personnel economics and whether findings from such data generalize to the labor force at large. In this paper, we examine personnel data from six large companies and establish how subjective ratings, interpreted as ordinal rankings of employees within narrowly...

  11. Research on Performance Evaluation of Group A Based on the Balanced Scorecard%基于平衡计分卡的A集团绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    郑永娟

    2012-01-01

    文章通过对A集团绩效评价现状,分析了A集团的经营现状及现行的绩效评价体系提出了A集团绩效评价改进,构建了新的绩效评价体系.%This paper evaluates the current state of performance of Group A, analyzes the current situation of the business performance and the performance evaluation system, measures are raised to improve the performance of Group A and a new performance evaluation system is constructed.

  12. Evaluation of Activity Recognition Algorithms for Employee Performance Monitoring

    Directory of Open Access Journals (Sweden)

    Mehreen Mumtaz

    2012-09-01

    Full Text Available Successful Human Resource Management plays a key role in success of any organization. Traditionally, human resource managers rely on various information technology solutions such as Payroll and Work Time Systems incorporating RFID and biometric technologies. This research evaluates activity recognition algorithms for employee performance monitoring. An activity recognition algorithm has been implemented that categorized the activity of employee into following in to classes: job activities and non-job related activities. Finally, the algorithm will compute the time which employee spent in job related and non-job related activities. This paper presents a novel architecture based upon video analytics that can facilitate Human Resource Managers in real time.

  13. 基于BSC的供应链绩效评价因子分析%Factor Analysis of Supply Chain Performance Evaluation Based on BSC

    Institute of Scientific and Technical Information of China (English)

    唐永俊

    2014-01-01

    借助若干可量化和可操作的指标进行了实例分析与验证,将复杂的供应链系统分解成若干子系统,建立了包括顾客满意度评价、供应链财务评价和供应链绿色度评价等子系统,运用因子分析法对其进行分析并得出结论,对实施供应链绩效控制有一定的指导和借鉴意义。%In this paper, we decomposed a complex supply chain system into several subsystems including the customer satisfaction subsystem, supply chain financial evaluation subsystem and supply chain greenness evaluation subsystem, etc., and at the end applied factor analysis in the process which yielded several useful conclusions.

  14. TAP 2, Performance-Based Training Manual

    Energy Technology Data Exchange (ETDEWEB)

    1991-07-01

    Training programs at DOE nuclear facilities should provide well- trained, qualified personnel to safely and efficiently operate the facilities in accordance with DOE requirements. A need has been identified for guidance regarding analysis, design, development, implementation, and evaluation of consistent and reliable performance-based training programs. Accreditation of training programs at Category A reactors and high-hazard and selected moderate-hazard nonreactor facilities will assure consistent, appropriate, and cost-effective training of personnel responsible for the operation, maintenance, and technical support of these facilities. Training programs that are designed and based on systematically job requirements, instead of subjective estimation of trainee needs, yield training activities that are consistent and develop or improve knowledge, skills, and abilities that can be directly related to the work setting. Because the training is job-related, the content of these programs more efficiently and effectively meets the needs of the employee. Besides a better trained work force, a greater level of operational reactor safety can be realized. This manual is intended to provide an overview of the accreditation process and a brief description of the elements necessary to construct and maintain training programs that are based on the requirements of the job. Two comparison manuals provide additional information to assist contractors in their efforts to accredit training programs.

  15. 基于平衡记分卡法制造业供应链绩效评价体系研究%Study on performance evaluation system of manufacturing supply chain based on balanced scorecard

    Institute of Scientific and Technical Information of China (English)

    刘秋生; 张利梅

    2011-01-01

    Performance evaluation is an important management strategy in manufacturing supply chain,while the traditional way of examination ignored the feedback effects.This paper constructs a performance evaluation index system from the whole perspectives of supply chain and constituents of manufacturing supply chain,based on the improved balance scorecard theory and manufacturing supply chain management practice.Finally,it establishes evaluation pattern by factor analysis and verifies the adaptability of performance evaluation index system by examples of manufacturing supply chain in Jiangsu and Zhejiang area.%绩效考核是我国制造业供应链的一项重要的管理战略,传统的考核方式忽视了评价结果对供应链运行的反馈作用,不再适应现代制造业管理需要。利用改进的平衡记分卡理论,密切联系制造业供应链的绩效管理的实践经验,从整体的供应链与供应链组成成员2个层面建立基于平衡记分卡法的制造业供应链绩效评价指标体系,并利用因子分析法原理构建绩效评价模型。最后通过对苏浙地区的制造业供应链绩效的构建实践,验证了该绩效评价体系的适应性。

  16. Performance evaluation of 1 kw PEFC

    Energy Technology Data Exchange (ETDEWEB)

    Komaki, Hideaki [Ishikawajima-Harima Heavy Industries Co., Ltd. Tokyo (Japan); Tsuchiyama, Syozo [Shipbuilding Research Association, Minato-ky, Tokyo (Japan)

    1996-12-31

    This report covers part of a joint study on a PEFC propulsion system for surface ships, summarized in a presentation to this Seminar, entitled {open_quote}Study on a PEFC Propulsion System for Surface Ships{close_quotes}, and which envisages application to a 1,500 DWT cargo vessel. The aspect treated here concerns the effects brought on PEFC operating performance by conditions particular to shipboard operation. The performance characteristics were examined through tests performed on a 1 kw stack and on a single cell (Manufactured by Fuji Electric Co., Ltd.). The tests covered the items (1) to (4) cited in the headings of the sections that follow. Specifications of the stack and single cell are as given.

  17. 基于修正模糊评价的建筑行业员工绩效评价方法研究%Employee performance evaluation method of construction industry based on the modified fuzzy evaluation

    Institute of Scientific and Technical Information of China (English)

    韦建华

    2011-01-01

    随着国际建筑市场的飞速发展,我国建筑行业也如雨后春笋般地快速崛起.但是快速发展的同时,也给建筑企业带来了一定的负面效应一一在建筑行业人才短缺的前提下,企业如何才能更有效地建立对本单位员工评价的方法,从而根据员工表现行为制定更为科学的措施.本文通过对传统的模糊综合方法进行分析修正,再用修正后的方法来评价建筑行业员工的绩效表现,结果表明,采用修正后的方法使得模糊评判具有更强的客观性和可行性.%With the rapid development of the international construction market, China's construction industry has mush-roomed rapidly rising, but excessive growth has also brought certain negative effect - - under the premise of talent shortage in the construction industry, how to build a more efficient evaluation methods of the employee in order to take scientific meas-ures. This paper revises the traditional method of fuzzy comprehensive amendments, and evaluates employee performance of construction industry. The result indicates that the revised method is more objective and feasible.

  18. Design and performance evaluation of the "iTIVA" algorithm for manual infusion of intravenous anesthetics based on effect-site target

    NARCIS (Netherlands)

    D.E. Ramírez (David Eduardo); J.A. Calvache (Jose Andrés)

    2016-01-01

    textabstractIntroduction: Remifentanil and propofol infusion using TCI pumps has proven to be beneficial for the practice of anesthesia but the availability of these systems is limited. Objective: Designing a pharmacokinetic model-based algorithm for calculating manual infusion regimens to achieve p

  19. Performance evaluation of SAR/GMTI algorithms

    Science.gov (United States)

    Garber, Wendy; Pierson, William; Mcginnis, Ryan; Majumder, Uttam; Minardi, Michael; Sobota, David

    2016-05-01

    There is a history and understanding of exploiting moving targets within ground moving target indicator (GMTI) data, including methods for modeling performance. However, many assumptions valid for GMTI processing are invalid for synthetic aperture radar (SAR) data. For example, traditional GMTI processing assumes targets are exo-clutter and a system that uses a GMTI waveform, i.e. low bandwidth (BW) and low pulse repetition frequency (PRF). Conversely, SAR imagery is typically formed to focus data at zero Doppler and requires high BW and high PRF. Therefore, many of the techniques used in performance estimation of GMTI systems are not valid for SAR data. However, as demonstrated by papers in the recent literature,1-11 there is interest in exploiting moving targets within SAR data. The techniques employed vary widely, including filter banks to form images at multiple Dopplers, performing smear detection, and attempting to address the issue through waveform design. The above work validates the need for moving target exploitation in SAR data, but it does not represent a theory allowing for the prediction or bounding of performance. This work develops an approach to estimate and/or bound performance for moving target exploitation specific to SAR data. Synthetic SAR data is generated across a range of sensor, environment, and target parameters to test the exploitation algorithms under specific conditions. This provides a design tool allowing radar systems to be tuned for specific moving target exploitation applications. In summary, we derive a set of rules that bound the performance of specific moving target exploitation algorithms under variable operating conditions.

  20. PERFORMANCE EVALUATION OF CHINESE NEW FUNDS

    Institute of Scientific and Technical Information of China (English)

    倪苏云; 翁轶丛; 吴冲锋

    2001-01-01

    he performance of Chinese investment funds was empirically analyzed using the following models, i.e. Jensen model, Treynor-Mazuy (T-M) model amd Merton-Henriksson model. The results show that T-M model is fitted to Chinese investment funds best among these three. But none of them can perfectly interpret the new funds' performance. So, the idea suggested by Jagannathan, Korajczyk (J-K) to extend the test was adopted in this paper, and the results show that J-K model augmented from the M-H can explain the source of excess return of fund Anxin.