WorldWideScience

Sample records for logistic network construction

  1. Research on 6R Military Logistics Network

    Science.gov (United States)

    Jie, Wan; Wen, Wang

    The building of military logistics network is an important issue for the construction of new forces. This paper has thrown out a concept model of 6R military logistics network model based on JIT. Then we conceive of axis spoke y logistics centers network, flexible 6R organizational network, lean 6R military information network based grid. And then the strategy and proposal for the construction of the three sub networks of 6Rmilitary logistics network are given.

  2. The Construction of Vegetable Logistics Network System%构建蔬菜物流网络系统

    Institute of Scientific and Technical Information of China (English)

    罗素

    2014-01-01

    文中根据实际情况及蔬菜的特点,建设了针对蔬菜的物流网络系统,包括了物流流程规划设计、仓库布局、加工中心设计与布局、配送方案设计等。%The paper , according to the characteristics of the actual situation and vegetables , the construction of logistics network system for the vegetables ,including the planning and design of logistics processes ,warehouse layout ,design and layout processing centers ,distribution plan design .

  3. Reverse logistics in the Brazilian construction industry.

    Science.gov (United States)

    Nunes, K R A; Mahler, C F; Valle, R A

    2009-09-01

    In Brazil most Construction and Demolition Waste (C&D waste) is not recycled. This situation is expected to change significantly, since new federal regulations oblige municipalities to create and implement sustainable C&D waste management plans which assign an important role to recycling activities. The recycling organizational network and its flows and components are fundamental to C&D waste recycling feasibility. Organizational networks, flows and components involve reverse logistics. The aim of this work is to introduce the concepts of reverse logistics and reverse distribution channel networks and to study the Brazilian C&D waste case.

  4. 山西省物流网络建设模式研究%Construction Mode of Logistics Network in Shanxi Province

    Institute of Scientific and Technical Information of China (English)

    张越

    2014-01-01

    Accelerate the development of the logistics enterprise information meet the needs of market economic development and the logistics enterprise development in Shanxi Province. Logistics Information is the important way to leap-forward development of logistics industry in Shanxi. The use of modern logistics industry, logistics technology information construction, To Integrate enterprise supply chain with the help of logistics information network platform and modern logistics technology in Shanxi, are important in the current economic transition and enterprise innovation in Shanxi.%物流业的发展对于促进山西省商品流通与企业生产成本的降低起到了关键作用,物流信息化是山西物流业跨越式发展的重要途径,将现代化的物流技术充分运用到物流业的信息化建设中,通过物流信息网络平台的建设对全省企业供应链进行整合对山西省当前经济转轨和企业创新具有重要意义。

  5. Reverse Logistics Network Structures and Design

    NARCIS (Netherlands)

    M. Fleischmann (Moritz)

    2001-01-01

    textabstractLogistics network design is commonly recognized as a strategic supply chain issue of prime importance. The location of production facilities, storage concepts, and transportation strategies are major determinants of supply chain performance. This chapter considers logistics network

  6. Reverse Logistics Network Structures and Design

    NARCIS (Netherlands)

    M. Fleischmann (Moritz)

    2001-01-01

    textabstractLogistics network design is commonly recognized as a strategic supply chain issue of prime importance. The location of production facilities, storage concepts, and transportation strategies are major determinants of supply chain performance. This chapter considers logistics network desi

  7. Reverse logistics in the construction industry.

    Science.gov (United States)

    Hosseini, M Reza; Rameezdeen, Raufdeen; Chileshe, Nicholas; Lehmann, Steffen

    2015-06-01

    Reverse logistics in construction refers to the movement of products and materials from salvaged buildings to a new construction site. While there is a plethora of studies looking at various aspects of the reverse logistics chain, there is no systematic review of literature on this important subject as applied to the construction industry. Therefore, the objective of this study is to integrate the fragmented body of knowledge on reverse logistics in construction, with the aim of promoting the concept among industry stakeholders and the wider construction community. Through a qualitative meta-analysis, the study synthesises the findings of previous studies and presents some actions needed by industry stakeholders to promote this concept within the real-life context. First, the trend of research and terminology related with reverse logistics is introduced. Second, it unearths the main advantages and barriers of reverse logistics in construction while providing some suggestions to harness the advantages and mitigate these barriers. Finally, it provides a future research direction based on the review. © The Author(s) 2015.

  8. Logistics Transformation through Sense-and-Respond Logistics Network

    OpenAIRE

    2005-01-01

    Proceedings Paper (for Acquisition Research Program) Commercial and military logistics continue to evolve from amassing supplies, through supply chain management, to (more recently) sense-and-respond networks. The realization that ''demand-pull'' is inherently more efficient than a ''supply-push'' strategy propels the migration from supply chains to demand networks. Major commercial enterprises in the United States and abroad have already transformed their supply chains to include Sense-...

  9. Logistic description of investment and construction management

    Directory of Open Access Journals (Sweden)

    Sborshchikov Sergey Borisovich

    2014-01-01

    Full Text Available The article is devoted to the questions of defining dynamic behavior of investment and construction activity as a technical and economic system and its formalized description. It is offered to use the term "condition vector" as one of the main characteristics while describing investment and construction activity. Logistic interpretation of a sustainable development of investment and construction defines the concept of optimum trajectory, which considers various dependencies of its components (construction operations, their preparation, design, material, technique, personnel, information, investment, etc.. It is necessary to point out that this state is homeostatic, which means, the managing system must provide continuous monitoring of each system component of investment and construction activities in accordance with the sustainable development pathway. The concept of dynamic balance used in logistics is identical to the concept of homeostatic balance, which is accepted in system engineering. It is defined as a property of technical and economic system, which implies that its deviations from the development pathway lie within admissible values.

  10. Flexible Sensor Network Reprogramming for Logistics

    NARCIS (Netherlands)

    Evers, L.; Havinga, P.J.M.; Kuper, J.

    2007-01-01

    Besides the currently realized applications, Wireless Sensor Networks can be put to use in logistics processes. However, doing so requires a level of flexibility and safety not provided by the current WSN software platforms. This paper discusses a logistics scenario, and presents SensorScheme, a run

  11. Planning logistics network for recyclables collection

    National Research Council Canada - National Science Library

    Ratkovic, Branislava; Popovic, Drazen; Radivojevic, Gordana; Bjelic, Nenad

    2014-01-01

    .... This paper presents a modeling approach that can be used for designing one part of recycling logistics network through defining optimal locations of collection points, and possible optimal scheduling...

  12. 多级煤炭物流网络优化选择模型的构建与应用%Construction and application of multi-level coal logistics network optimization model

    Institute of Scientific and Technical Information of China (English)

    汪文生; 曾志猛; 王娟

    2011-01-01

    Analysis suggests the main objective of the coal logistics systems optimization design is to minimize the total cost of the logistics network, transportation costs, storage costs, logistics infrastructure construction costs and ordering costs are the main costs of coal logistics system, the largest share is transportation costs among them, accounting for 53%. Gave a quantitative logistics cost calculation method of coal logistics system. It set up a multi-level coal logistics network optimization model under the condition of customer demand, order mode, resource supply and construction funds, applying the mixed integer programming. It analyzed coal logistics network of Yangquan Company Shanxi Coal Transportation and Sales Group Co. , Ltd. The coal logistics network optimization model can effectively reduce the coal logistics costs.%通过分析认为,物流系统总费用最小化是煤炭物流网络优化设计的主要目标,运输费用、储存费用、物流设施建设费用、订货费用是煤炭物流系统最主要费用,其中以运输费用份额最大,约占53%.给出了煤炭物流系统物流费用的定量计算方法,以客户需求、订货方式、资源供应、建设资金等为主要约束条件,应用混合整数规划方法,建立了多级煤炭物流网络优化模型,并对山西煤销集团阳泉公司的煤炭物流网络进行了应用分析,结果表明构建的煤炭物流网络优化选择模型能有效降低煤炭物流费用.

  13. Delivery Time Reliability Model of Logistics Network

    OpenAIRE

    Liusan Wu; Qingmei Tan; Yuehui Zhang

    2013-01-01

    Natural disasters like earthquake and flood will surely destroy the existing traffic network, usually accompanied by delivery delay or even network collapse. A logistics-network-related delivery time reliability model defined by a shortest-time entropy is proposed as a means to estimate the actual delivery time reliability. The less the entropy is, the stronger the delivery time reliability remains, and vice versa. The shortest delivery time is computed separately based on two different assum...

  14. Logistics Mode and Network Planning for Recycle of Crop Straw Resources

    Institute of Scientific and Technical Information of China (English)

    Lingyun; ZHOU; Weidong; GU; Qing; ZHANG

    2013-01-01

    To realize the straw biomass industrialized development,it should speed up building crop straw resource recycle logistics network, increasing straw recycle efficiency,and reducing straw utilization cost. On the basis of studying straw recycle process,this paper presents innovative concept and property of straw recycle logistics network,analyses design thinking of straw recycle logistics network,and works out straw recycle logistics mode and network topological structure. Finally,it comes up with construction and operation strategies of the straw logistics network from infrastructure,organization network,and information platform.

  15. Current situation and countermeasures of port logistics park information construction

    Directory of Open Access Journals (Sweden)

    Zhen Liu

    2013-03-01

    Full Text Available Purpose: Improve work efficiency of logistics park department, and drive the economy of the park and its surrounding areas. Design/methodology/approach: Analyze the information development situation and existent questions of current national logistics park, and design proper scheme to meet the demand of port logistics park. Findings: Proposed an information construction implementation plan using technology of the Internet of things which can be applied to port logistics park. Designed a scheme for the park information construction and explained the system's implementation strategy and implementation steps. Practical implications: The proposed construction program is particularly suitable for the northwest port logistics parks in China, and also has reference function to other logistics park construction. Originality/value: Group the information construction of the logistics park into four levels, three types of users, and two requirements. The scheme is innovative and comprehensive, which can ensure the development of port logistics park.

  16. Research on Constructing Modern Logistics Network System of Wanjiang City Belt%皖江城市带现代物流网络体系的构建研究

    Institute of Scientific and Technical Information of China (English)

    毕学成; 胡庆十; 毕学进

    2012-01-01

    承接产业示范转移,皖江城市带发展现代物流业势在必行。通过研究发现,皖江城市带构建现代物流网络体系条件成熟。根据皖江城市带各城市的基础条件,确定合肥、芜湖和安庆为物流网络的区域中心城市,通过“轴三角”连接,依据区域中心城市的辐射能力和完全覆盖为原则,最终确定皖江城市带现代物流网络体系。最后,从打造产业转移示范平台、培育高端物流人才等方面为构建皖江城市带现代物流体系提出了保障性建议。%To undertake the industrial transfer demonstration of Wanjiang City Belt, the development of modem logistics industry is imperative. Through studies, conditions of constructing modem logistics network system of Wanjiang City Belt have been mature. According to the hasic conditions of each city in Wanjiang City Belt, Hefei, Wuhu and Anqing as regional center cities of logistics network have been determined. Connected through the "axial triangle", according to the principles of radiation capacity and complete covering from the regional central city, modern logistics network system of Waniiang City Belt have l:~een ultimately confirmed. Finally, indemnificatory recommendations for the construction of modem logistics system in Wanjiang City Belt have been put forward from building the industrial transfer demonstration platform, to training high-end logistics talents.

  17. Construction of hazard maps of Hantavirus contagion using Remote Sensing, logistic regression and Artificial Neural Networks: case Araucan\\'ia Region, Chile

    CERN Document Server

    Alvarez, G; Salinas, R

    2016-01-01

    In this research, methods and computational results based on statistical analysis and mathematical modelling, data collection in situ in order to make a hazard map of Hanta Virus infection in the region of Araucania, Chile are presented. The development of this work involves several elements such as Landsat satellite images, biological information regarding seropositivity of Hanta Virus and information concerning positive cases of infection detected in the region. All this information has been processed to find a function that models the danger of contagion in the region, through logistic regression analysis and Artificial Neural Networks

  18. Impact of Different Carbon Policies on City Logistics Network

    Directory of Open Access Journals (Sweden)

    Yang Jianhua

    2015-01-01

    Full Text Available A programming model for a four-layer urban logistics distribution network is constructed and revised based on three types of carbon emissions policies such as Carbon tax, carbon emissions Cap, Carbon Trade. Effects of different policies on logistics costs and carbon emissions are analyzed based on a spatial Logistics Infrastructure layout of Beijing. Research findings are as follows: First, based on low-carbon policies, the logistics costs and carbon emissions can be changed by different modes of transport in a certain extent; second, only when carbon taxes and carbon trading prices are higher, carbon taxes and carbon trading policies can reduce carbon emissions while not significantly increase logistics costs at the same time, and more effectively achieve carbon reduction targets than use carbon cap policy.

  19. 京津冀轴辐式区域物流网络的构建与对策%Construction and Suggestion of Hub-and-spoke Logistics Network for Beijing-Tianjin-Hebei

    Institute of Scientific and Technical Information of China (English)

    李明芳; 薛景梅

    2015-01-01

    为提高京津冀区域物流效率,借助主成分分析法和城市引力模型,结合京津冀区域物流体系特征,构建了轴辐式区域物流网络。研究表明:京津冀区域物流可以构建为“四轴九辐”的网络结构,北京、天津、石家庄和唐山作为轴心城市,其他九个城市作为辐心城市,各自所辖县市作为腹地,辐心城市物流经过轴心城市集散实现区域内以及与区域外的货物流通。结合轴心城市物流现状和未来功能定位,从轴心城市未来物流建设、城市间物流设施规划建设、区域子物流网络构建以及物流信息系统建设等方面提出对策建议。%In order to improve the efficiency of regional logistics in Beijing-Tianjin-Hebei,a hub-and-spoke logistics network has been constructed,which has used the principal component method and city gravitation model. Research shows that the regional logistics for Beijing-Tianjin-Hebei should be a structure with four hubs and nine spokes. Beijing,Tianjin, Shijiazhuang,and Tangshan should act as the hubs in the logistics network,and the other nine cities should act as the spokes. The hub cities will act as distributions for the spoke cities’logistics within and outside of Beijing-Tianjin-Hebei. Combining with the future function position of Beijing-Tianjin-Hebei,several suggestions has been put forward from the aspects of cities’future logistics construction,logistics facilities planning,regional logistic sub-network,and logistics information system.

  20. Performance evaluation of interconnected logistics networks confronted to hub disruptions

    OpenAIRE

    2016-01-01

    International audience; This paper investigates performance of interconnected logistics networks confronted to disruptions at hub level. With traditional supply chain network design, companies define and optimize their own logistics networks, resulting in current logistics systems being a set of independent heterogeneous logistics networks. The concept of PI aims to integrate independent logistics networks into a global, open, interconnected system. Prior research has shown that the new organ...

  1. Constructive neural network learning

    OpenAIRE

    Lin, Shaobo; Zeng, Jinshan; Zhang, Xiaoqin

    2016-01-01

    In this paper, we aim at developing scalable neural network-type learning systems. Motivated by the idea of "constructive neural networks" in approximation theory, we focus on "constructing" rather than "training" feed-forward neural networks (FNNs) for learning, and propose a novel FNNs learning system called the constructive feed-forward neural network (CFN). Theoretically, we prove that the proposed method not only overcomes the classical saturation problem for FNN approximation, but also ...

  2. Designing eco-effective reverse logistics networks

    NARCIS (Netherlands)

    Souza, De Vitor; Borsato, Milton; Bloemhof-Ruwaard, Jacqueline

    2016-01-01

    Reverse Logistics Networks (RLNs) have grown in importance after return policies became compulsory. Lately, questions have been raised whether they are as helpful to the environment as possible. Efforts have been conducted to optimize RLNs in terms of their eco-efficiency, minimizing costs and emiss

  3. Designing eco-effective reverse logistics networks

    NARCIS (Netherlands)

    Souza, De Vitor; Borsato, Milton; Bloemhof-Ruwaard, Jacqueline

    2016-01-01

    Reverse Logistics Networks (RLNs) have grown in importance after return policies became compulsory. Lately, questions have been raised whether they are as helpful to the environment as possible. Efforts have been conducted to optimize RLNs in terms of their eco-efficiency, minimizing costs and

  4. 稀土逆向物流网络的组建方案、功能及要素%Construction scheme, function and elements of the reverse logistics network in rare earth industry

    Institute of Scientific and Technical Information of China (English)

    许礼刚

    2015-01-01

    通过分析稀土产业逆向物流的特点,总结稀土产业逆向物流资源在国内的分布状况,探寻其逆向物流网络的组建方案,再依据稀土回收再利用的流程,提出逆向物流网络实现的功能,重点从稀土逆向物流设施设备的选择和逆向物流层级设计2个方面构建逆向物流网络体系,降低因放射性等因素对自然环境的污染和损害,同时做好最优化利用稀土资源,借此加快稀土产业逆向物流的发展,维护稀土资源的持续利用。%By analyzing the features of the reverse logistics in rare earth industry, summarizing the distribution of the resources in China and exploring the scheme of reverse logistics network, the function of establishing the reverse logistics network was put forward according to the recycling procedures of rare earth. The key point was to construct the network system from two aspects-the selection of the rare earth reverse logistics equipment and the design of the reverse logistics level and reduce the pollution and damage to the natural environment caused by radiation and so on. At the same time, optimum use of rare earth resource should be made to accelerate the development of reverse logistics in rare earth industry and maintain the sustainable utilization of rare earth.

  5. Spreadsheets In Function Of Optimisation Of Logistics Network

    OpenAIRE

    Drago Pupavac; Mimo Draskovic

    2007-01-01

    This scientific paper discusses how estimated spreadsheets functions in logistics networks optimisation. The suggested working hypothesis for efficacy of estimated spreadsheets in designing logistics networks is proved and a practical example. In this way the given model can be applied to all logistics networks of similar problem capacity. Logistics network model confronting estimated spreadsheets present a real world at a level needed for understanding the problem of optimisation of logistic...

  6. Simulation Research of Space-Time Evolution of Emergency Logistics Network Reliability Based on Complex Network Theory

    Directory of Open Access Journals (Sweden)

    Li Huang

    2013-01-01

    Full Text Available We propose the conception and evaluation indexes of emergency logistics network connecting reliability to construct evaluation index system of complex network reliability, and describe these indexes quantitatively to evaluate the network connecting reliability. Moreover, the network topological model and the simulation methods of reliability measurement when the network is under attack are present. Finally, we take three classical emergency logistics networks as examples, and through emulation analysis we obtain the connecting reliability changing situation of these three networks under random attack, the changing curve of the ratio of effective demand nodes and emergence supply mileage of emergency logistics network with same network density but different forms, and then evaluate the emergency logistics network connecting reliability. This can provide references for the designing of emergency logistics network with high reliability and analysis means for research in other fields.

  7. Delivery Time Reliability Model of Logistics Network

    Directory of Open Access Journals (Sweden)

    Liusan Wu

    2013-01-01

    Full Text Available Natural disasters like earthquake and flood will surely destroy the existing traffic network, usually accompanied by delivery delay or even network collapse. A logistics-network-related delivery time reliability model defined by a shortest-time entropy is proposed as a means to estimate the actual delivery time reliability. The less the entropy is, the stronger the delivery time reliability remains, and vice versa. The shortest delivery time is computed separately based on two different assumptions. If a path is concerned without capacity restriction, the shortest delivery time is positively related to the length of the shortest path, and if a path is concerned with capacity restriction, a minimax programming model is built to figure up the shortest delivery time. Finally, an example is utilized to confirm the validity and practicality of the proposed approach.

  8. Planning logistics network for recyclables collection

    Directory of Open Access Journals (Sweden)

    Ratković Branislava

    2014-01-01

    Full Text Available Rapid urbanization, intensified industrialization, rise of income, and a more sophisticated form of consumerism are leading to an increase in the amount and toxicity of waste all over the world. Whether reused, recycled, incinerated or put into landfill sites, the management of household and industrial waste yield financial and environmental costs. This paper presents a modeling approach that can be used for designing one part of recycling logistics network through defining optimal locations of collection points, and possible optimal scheduling of vehicles for collecting recyclables. [Projekat Ministarstva nauke Republike Srbije, br. TR36005

  9. Electronic Commerce Logistics Network Optimization Based on Swarm Intelligent Algorithm

    Directory of Open Access Journals (Sweden)

    Yabing Jiao

    2013-09-01

    Full Text Available This article establish an efficient electronic commerce logistics operation system to reduce distribution costs and build a logistics network operation model based on around the B2C electronic commerce enterprise logistics network operation system. B2C electronic commerce transactions features in the enterprise network platform. To solve the NP-hard problem this article use hybrid ant colony algorithm, particle swarm algorithm and group swarm intelligence algorithm to get a best solution. According to the intelligent algorithm, design of electronic commerce logistics network optimization system, enter the national 22 electronic commerce logistics network for validation. Through the experiment to verify the optimized logistics cost greatly decreased. This research can help B2C electronic commerce enterprise logistics network to optimize decision-making under the premise of ensuring the interests of consumers and service levels also can be an effective way for enterprises to improve the efficiency of logistics services and reduce operation costs

  10. The Transportation Cost Analysis and Logistics Network Construction of Biomass Materials%生物质原料运输成本分析与物流网络设计

    Institute of Scientific and Technical Information of China (English)

    张国晨; 孙飞; 刘胜男

    2011-01-01

    Based on field research and getting information and data from relevant resources, the study is about logistics network of biomass costs. This is the first time study of logistics costs of raw materials costs , especially transportation cost analysis, detailed cost. Second, in the premise of determining the logistics costs of raw materials and storage positions, through the establishment of a reasonable mathematical model and optimizing the calculation by Matlab, we could get the best raw materials scheduling scheme of lowest costs on transportation ,inventory and operating ,thus offer some reference for this kind of enterprise on network construction of raw materials logistics and optimization.%物流网络的设计对于生物质原料企业的发展至关重要,以包头市某企业作为研究对象,通过对生物质原料运输成本的归纳分析,在明确原料物流成本和收储点位置的前提下,构建生物质原料物流网络模型.利用仿真优化、生物质原料物流网络模型,能够达到运输成本、库存成本、运营成本最优的原料调度方案,从而为生物质原料企业的原料物流网络建设和优化提供一定的参考与借鉴价值.

  11. Determinants of Distribution Logistics in the Construction Industry

    Science.gov (United States)

    Bukova, Bibiana; Brumercikova, Eva; Kondek, Pavol

    2017-03-01

    Global business is currently still influenced by the economic crisis and the economic development in each country of the EU. The construction sector is among the most affected sectors of the national economies. The production of building material is a part of the construction industry. Several companies of this sector in the European Union use business logistics effectively. The overall efficiency of the company is influenced by many various external and internal determinants, especially the distribution logistics.

  12. Creating the networking enterprises - logistics determinants

    Directory of Open Access Journals (Sweden)

    Ewa Kulińska

    2014-06-01

    Full Text Available Background: The article describes the determinants of creating network enterprises with peculiar consideration of logistic factors which are conditioning the organization of processes, exchange of resources and competences. On the basis of literature analysis, there is proposed a model of creating network enterprises. A model is verified in the application part of the thesis. Methods: Within the publication a literature review of submitted scope of the interest was presented, as well as the empirical research. A research substance attaches the enterprises created on the basis of the reactivation of organizations which has collapsed due to bankruptcy proceeding. The research was based upon direct interviews with employees of the net-forming entities. Results and conclusions: Results of the research shows that taking up the cooperation and net-cooperation was the only possibility for new entities to come into existence, that were  based upon old assets and human resources liquidated during bankruptcy proceeding. There was indentified many determinants of enterprises network cooperation, however due to the research a conclusion draws, that basic factors of creating network cooperation are those which are profit-achieving oriented.

  13. Combining logistic regression and neural networks to create predictive models.

    OpenAIRE

    Spackman, K. A.

    1992-01-01

    Neural networks are being used widely in medicine and other areas to create predictive models from data. The statistical method that most closely parallels neural networks is logistic regression. This paper outlines some ways in which neural networks and logistic regression are similar, shows how a small modification of logistic regression can be used in the training of neural network models, and illustrates the use of this modification for variable selection and predictive model building wit...

  14. Logistic regression against a divergent Bayesian network

    Directory of Open Access Journals (Sweden)

    Noel Antonio Sánchez Trujillo

    2015-01-01

    Full Text Available This article is a discussion about two statistical tools used for prediction and causality assessment: logistic regression and Bayesian networks. Using data of a simulated example from a study assessing factors that might predict pulmonary emphysema (where fingertip pigmentation and smoking are considered; we posed the following questions. Is pigmentation a confounding, causal or predictive factor? Is there perhaps another factor, like smoking, that confounds? Is there a synergy between pigmentation and smoking? The results, in terms of prediction, are similar with the two techniques; regarding causation, differences arise. We conclude that, in decision-making, the sum of both: a statistical tool, used with common sense, and previous evidence, taking years or even centuries to develop; is better than the automatic and exclusive use of statistical resources.

  15. Strategies on the Implementation of China's Logistics Information Network

    Science.gov (United States)

    Dong, Yahui; Li, Wei; Guo, Xuwen

    The economic globalization and trend of e-commerce network have determined that the logistics industry will be rapidly developed in the 21st century. In order to achieve the optimal allocation of resources, a worldwide rapid and sound customer service system should be established. The establishment of a corresponding modern logistics system is the inevitable choice of this requirement. It is also the inevitable choice for the development of modern logistics industry in China. The perfect combination of modern logistics and information network can better promote the development of the logistics industry. Through the analysis of Status of Logistics Industry in China, this paper summed up the domestic logistics enterprise logistics information system in the building of some common problems. According to logistics information systems planning methods and principles set out logistics information system to optimize the management model.

  16. Decision-making on reverse logistics in the construction industry

    Directory of Open Access Journals (Sweden)

    Thanwadee Chinda

    2016-02-01

    Full Text Available With the growing competition, many construction organizations attempt to improve their productivity, quality, and efficiency. Construction waste management, by means of reverse logistics, becomes a key issue to improve the productivity, and raise the company’s green image. In this study, four reverse logistics methods-direct reuse, remanufacturing, recycling, and landfill-are considered to manage construction and demolition (C&D waste. Two factors (economic and site-specific with their 15 sub-factors affecting the decisions to implement the reverse logistics are examined. The hierarchy model of reverse logistics decisions, developed through the analytic hierarchy process, reveal the importance of the economic factor over the site-specific factor. It is suggested that the transportation cost, the processing cost, the specific sorting technology, and the limited project time must be first considered before making decisions on reverse logistics plans. The construction company can utilize the developed hierarchy model to decide on the most appropriate reverse logistics plan to achieve the best benefits.

  17. Application of wireless sensor network technology in logistics information system

    Science.gov (United States)

    Xu, Tao; Gong, Lina; Zhang, Wei; Li, Xuhong; Wang, Xia; Pan, Wenwen

    2017-04-01

    This paper introduces the basic concepts of active RFID (WSN-ARFID) based on wireless sensor networks and analyzes the shortcomings of the existing RFID-based logistics monitoring system. Integrated wireless sensor network technology and the scrambling point of RFID technology. A new real-time logistics detection system based on WSN and RFID, a model of logistics system based on WSN-ARFID is proposed, and the feasibility of this technology applied to logistics field is analyzed.

  18. Modeling of Robust Design of Remanufacturing Logistics Networks

    Institute of Scientific and Technical Information of China (English)

    XIA Shou-chang; XI Li-feng

    2005-01-01

    The uncertainty of time, quantity and quality of recycling products leads to the bad stability and flexibility of remanufacturing logistics networks, while general design only covers the minimizing logistics cost, so robust design is presented to solve it. The mathematical model of remanufacturing logistics networks is built on the stochastic distribution of uncontrollable factors, and robust objectives are presented. The basic elements of robust design of remanufacturing logistics are redefined, and each part of mathematical model is explained in detail as well. Robust design of remanufacturing logistics networks is a problem of multi-objective optimization in essence.

  19. Robust Optimization of Fourth Party Logistics Network Design under Disruptions

    Directory of Open Access Journals (Sweden)

    Jia Li

    2015-01-01

    Full Text Available The Fourth Party Logistics (4PL network faces disruptions of various sorts under the dynamic and complex environment. In order to explore the robustness of the network, the 4PL network design with consideration of random disruptions is studied. The purpose of the research is to construct a 4PL network that can provide satisfactory service to customers at a lower cost when disruptions strike. Based on the definition of β-robustness, a robust optimization model of 4PL network design under disruptions is established. Based on the NP-hard characteristic of the problem, the artificial fish swarm algorithm (AFSA and the genetic algorithm (GA are developed. The effectiveness of the algorithms is tested and compared by simulation examples. By comparing the optimal solutions of the 4PL network for different robustness level, it is indicated that the robust optimization model can evade the market risks effectively and save the cost in the maximum limit when it is applied to 4PL network design.

  20. A Mathematical Model to Improve the Performance of Logistics Network

    Directory of Open Access Journals (Sweden)

    Muhammad Izman Herdiansyah

    2012-01-01

    Full Text Available The role of logistics nowadays is expanding from just providing transportation and warehousing to offering total integrated logistics. To remain competitive in the global market environment, business enterprises need to improve their logistics operations performance. The improvement will be achieved when we can provide a comprehensive analysis and optimize its network performances. In this paper, a mixed integer linier model for optimizing logistics network performance is developed. It provides a single-product multi-period multi-facilities model, as well as the multi-product concept. The problem is modeled in form of a network flow problem with the main objective to minimize total logistics cost. The problem can be solved using commercial linear programming package like CPLEX or LINDO. Even in small case, the solver in Excel may also be used to solve such model.Keywords: logistics network, integrated model, mathematical programming, network optimization

  1. A Mathematical Model to Improve the Performance of Logistics Network

    Directory of Open Access Journals (Sweden)

    Muhammad Izman Herdiansyah

    2012-01-01

    Full Text Available The role of logistics nowadays is expanding from just providing transportation and warehousing to offering total integrated logistics. To remain competitive in the global market environment, business enterprises need to improve their logistics operations performance. The improvement will be achieved when we can provide a comprehensive analysis and optimize its network performances. In this paper, a mixed integer linier model for optimizing logistics network performance is developed. It provides a single-product multi-period multi-facilities model, as well as the multi-product concept. The problem is modeled in form of a network flow problem with the main objective to minimize total logistics cost. The problem can be solved using commercial linear programming package like CPLEX or LINDO. Even in small case, the solver in Excel may also be used to solve such model.Keywords: logistics network, integrated model, mathematical programming, network optimization

  2. Discussion on the Logistics Construction of Railway Container Freight Stations

    Institute of Scientific and Technical Information of China (English)

    迟永林; 张锦

    2002-01-01

    From the perspective of logistics, the article discusses some essential functions and service functions of railway container freight stations. Then it plans the construction of the logistics operation system of container freight stations, and designs five main operating yards such as deconsolidation and groupage yard, storage and distribution yard, container receiving-departure yard, container stack yard, and special cargo yard. The management pattern is discussed under the direction of modern business management theory. The ideas presented in this article is significant to the construction of railway container freight stations.

  3. A robust optimization model for green regional logistics network design with uncertainty in future logistics demand

    Directory of Open Access Journals (Sweden)

    Dezhi Zhang

    2015-12-01

    Full Text Available This article proposes a new model to address the design problem of a sustainable regional logistics network with uncertainty in future logistics demand. In the proposed model, the future logistics demand is assumed to be a random variable with a given probability distribution. A set of chance constraints with regard to logistics service capacity and environmental impacts is incorporated to consider the sustainability of logistics network design. The proposed model is formulated as a two-stage robust optimization problem. The first-stage problem before the realization of future logistics demand aims to minimize a risk-averse objective by determining the optimal location and size of logistics parks with CO2 emission taxes consideration. The second stage after the uncertain logistics demand has been determined is a scenario-based stochastic logistics service route choices equilibrium problem. A heuristic solution algorithm, which is a combination of penalty function method, genetic algorithm, and Gauss–Seidel decomposition approach, is developed to solve the proposed model. An illustrative example is given to show the application of the proposed model and solution algorithm. The findings show that total social welfare of the logistics system depends very much on the level of uncertainty in future logistics demand, capital budget for logistics parks, and confidence levels of the chance constraints.

  4. Risk assessment of logistics outsourcing based on BP neural network

    Science.gov (United States)

    Liu, Xiaofeng; Tian, Zi-you

    The purpose of this article is to evaluate the risk of the enterprises logistics outsourcing. To get this goal, the paper first analysed he main risks existing in the logistics outsourcing, and then set up a risk evaluation index system of the logistics outsourcing; second applied BP neural network into the logistics outsourcing risk evaluation and used MATLAB to the simulation. It proved that the network error is small and has strong practicability. And this method can be used by enterprises to evaluate the risks of logistics outsourcing.

  5. Reverse logistics network design: a holistic life cycle approach

    National Research Council Canada - National Science Library

    Daaboul, Joanna; Le Duigou, Julien; Penciuc, Diana; Eynard, Benoît

    2014-01-01

    .... This article addresses the issue of designing the reverse logistics network assuring the needed volume of recycled aluminum for the production of L-shaped front lower control arms for personal cars. It details the developed method and demonstrator for designing a reverse logistics network based on a life cycle assessment.

  6. AML (Logistics Center) Local Area Network -

    Data.gov (United States)

    Department of Transportation — The AML LAN is designed to facilitate the services and resources needed to support the operations of the FAA Logistics Center users. The AML LAN provides support for...

  7. Generalized multidirectional fuzzy map model of the logistics system networks

    Science.gov (United States)

    Ji, Chun-Rong; Liu, Ming-Yuan; Li, Yan; He, Yue M.

    1997-07-01

    By conducting [0, 1] treatment to time consuming of logistics system network key links, and regarding the time consumed by manufacture, inspection, storage, assembling, packing and market as a kind of existent extent of the joint and the time consumed by materials handling, transportation and logistics information as the connection strength between joints in a generalized multi-directional fuzzy map, a generalized multi-directional fuzzy map model of logistics system networks is built. The mutual flow among network joints and the special form of generalized fuzzy matrix is analyzed. Finally, an example of model building is given.

  8. A characterization of logistics networks for product recovery

    NARCIS (Netherlands)

    Fleischmann, Moritz; Krikke, H.R.; Dekker, Rommert; Flapper, Simme Douwe P.

    2000-01-01

    Recovery of used products is receiving much attention recently due to growing environmental concern. Efficient implementation requires appropriate logistics structures to be set up for the arising goods flow from users to producers. We investigate the design of such logistics networks. As a basis

  9. Logistics outsourcing for economies in business networks

    OpenAIRE

    Juntunen, J

    2010-01-01

    Abstract The fundamental choice among governance mechanism is whether to externally organize transactions outside the boundary of the firm in the market, or whether to internally organize transactions within the firm's boundaries. In other words, major decision which is made on the firm's organizational strategy culminates in the make-or-buy decisions. In business and especially in the context of logistics, the worldwide usage and importance of outsourcing has grown dramatically over the l...

  10. Risks Analysis of Logistics Financial Business Based on Evidential Bayesian Network

    Directory of Open Access Journals (Sweden)

    Ying Yan

    2013-01-01

    Full Text Available Risks in logistics financial business are identified and classified. Making the failure of the business as the root node, a Bayesian network is constructed to measure the risk levels in the business. Three importance indexes are calculated to find the most important risks in the business. And more, considering the epistemic uncertainties in the risks, evidence theory associate with Bayesian network is used as an evidential network in the risk analysis of logistics finance. To find how much uncertainty in root node is produced by each risk, a new index, epistemic importance, is defined. Numerical examples show that the proposed methods could provide a lot of useful information. With the information, effective approaches could be found to control and avoid these sensitive risks, thus keep logistics financial business working more reliable. The proposed method also gives a quantitative measure of risk levels in logistics financial business, which provides guidance for the selection of financing solutions.

  11. For Researching the Construction of Agricultural Products Cold-chain Logistics Network in Yunnan Province%云南省农产品冷链物流网络的构建研究

    Institute of Scientific and Technical Information of China (English)

    刘丽萍

    2014-01-01

    The Yunnan fresh agricultural products due to the existence of series of abuses the link of the cold chain logistics of fresh agricultural products,which has not yet formed a production,supply and marketing integration of cold chain logistics system,which led to the Yunnan fresh agricultural products less competitive,hinder the steady income of farmers.Therefore,actively build Yunnan fresh agricultural products cold chain logistics network system can effectively promote the development of industry chain,increase farmers'benefit,is an important way to solve the obstacles of fresh agricultural products development at present.This article from the Yunnan fresh food cold chain logistics line,organization,information network structure analysis of cold chain logistics network in the south.%云南生鲜农产品由于其冷链物流环节存在系列弊端,致使生鲜农产品尚未形成生产、供应及销售一体化冷链物流体系,这导致云南生鲜农产品缺乏相应的竞争力,直接阻碍了农民的稳定收入。为此,积极构建云南生鲜农产品冷链物流网络体系能有效促进产业链发展,增加农民受益,是解决当前阻碍生鲜农产品发展的重要途径。文中从云南生鲜冷链物流的线路、组织、信息等网络结构方面分析云南冷链物流网络的状况。

  12. Cities and transport networks in shipping and logistics research

    OpenAIRE

    Ducruet, César; Lugo, Igor

    2013-01-01

    International audience; While shipping and logistics studies often describe the flows and networks on the level of firms and terminals rather than cities, urban studies pay limited attention to transport infrastructure and material flows. The renewal of network analysis based on complex systems will be discussed in this paper as a potential bridge between those two approaches. It particularly focuses on how transport and urban elements can be mutually integrated. The main conclusion points at...

  13. Network Design in Reverse Logistics: A Quantitative Model

    NARCIS (Netherlands)

    Krikke, H.R.; Kooij, E.J.; Schuur, Peter; Speranza, M. Grazia; Stähly, Paul

    1999-01-01

    The introduction of (extended) producer responsibility forces Original Equipment Manufacturers to solve entirely new managerial problems. One of the issues concerns the physical design of the reverse logistic network, which is a problem that fits into the class of facility-location problems. Since

  14. A Methodology for Assessing Eco-Efficiency in Logistics Networks

    NARCIS (Netherlands)

    Quariguasi Frota Neto, J.; Walther, G.; Bloemhof, J.M.; Nunen, van J.A.E.E.; Spengler, T.

    2009-01-01

    Recent literature on sustainable logistics networks points to two important questions: (i) How to spot the preferred solution(s) balancing environmental and business concerns? (ii) How to improve the understanding of the trade-offs between these two dimensions? We posit that a visual exploration of

  15. A Methodology for Assessing Eco-Efficiency in Logistics Networks

    NARCIS (Netherlands)

    J. Quariguasi Frota Neto (João); G. Walther; J.M. Bloemhof-Ruwaard (Jacqueline); J.A.E.E. van Nunen (Jo); T. Spengler

    2007-01-01

    textabstractRecent literature on sustainable logistics networks points to two important questions: (i) How to spot the preferred solution(s) balancing environmental and business concerns? (ii) How to improve the understanding of the trade-offs between these two dimensions? We posit that a complete

  16. A Methodology for Assessing Eco-efficiency in Logistics Networks

    NARCIS (Netherlands)

    J. Quariguasi Frota Neto (João); G. Walther; J.M. Bloemhof-Ruwaard (Jacqueline); J.A.E.E. van Nunen (Jo); T. Spengler

    2006-01-01

    textabstractRecent literature on sustainable logistics networks points to two important questions: (i) How to spot the preferred solution(s) balancing environmental and business concerns? (ii) How to improve the understanding of the trade-offs between these two dimensions? We posit that a complete

  17. Bifurcation Analysis of Equilibria in Competitive Logistic Networks with Adaptation

    Science.gov (United States)

    Raimondi, A.; Tebaldi, C.

    2008-04-01

    A general n-node network is considered for which, in absence of interactions, each node is governed by a logistic equation. Interactions among the nodes take place in the form of competition, which also includes adaptive abilities through a (short term) memory effect. As a consequence the dynamics of the network is governed by a system of n2 nonlinear ordinary differential equations. As a first step, equilibria and their stability are investigated analytically for the general network in dependence of the relevant parameters, namely the strength of competition, the adaptation rate and the network size. The existence of classes of invariant subspaces, related to symmetries, allows the introduction of a reduced model, four dimensional, where n appears as a parameter, which give full account of existence and stability for the equilibria in the network.

  18. Consumer Choice Prediction: Artificial Neural Networks versus Logistic Models

    Directory of Open Access Journals (Sweden)

    Christopher Gan

    2005-01-01

    Full Text Available Conventional econometric models, such as discriminant analysis and logistic regression have been used to predict consumer choice. However, in recent years, there has been a growing interest in applying artificial neural networks (ANN to analyse consumer behaviour and to model the consumer decision-making process. The purpose of this paper is to empirically compare the predictive power of the probability neural network (PNN, a special class of neural networks and a MLFN with a logistic model on consumers’ choices between electronic banking and non-electronic banking. Data for this analysis was obtained through a mail survey sent to 1,960 New Zealand households. The questionnaire gathered information on the factors consumers’ use to decide between electronic banking versus non-electronic banking. The factors include service quality dimensions, perceived risk factors, user input factors, price factors, service product characteristics and individual factors. In addition, demographic variables including age, gender, marital status, ethnic background, educational qualification, employment, income and area of residence are considered in the analysis. Empirical results showed that both ANN models (MLFN and PNN exhibit a higher overall percentage correct on consumer choice predictions than the logistic model. Furthermore, the PNN demonstrates to be the best predictive model since it has the highest overall percentage correct and a very low percentage error on both Type I and Type II errors.

  19. 汽车逆向物流网络规划%Automobile Reverse Logistics Network Planning

    Institute of Scientific and Technical Information of China (English)

    黄莉

    2016-01-01

    With the development of social economy,all walks of life are path of informatization,automobile reverse logistics,to the road network development.One is with the integer linear programming to construct network hybrid model of automobile reverse logistics,secondly,the design of the automobile reverse logistics network optimization model of heuristic algorithm based on genetic algorithm,three is to validate the network algorithm is effective,and it is implemented by an example. In this paper,from the problems existing in the automobile reverse logistics based on hypothesis model analysis,in view of the enterprise reverse logistics network planning problem put forward constructive methods,in order to in the future the same study can play a reference role.%随着社会经济的发展,各行各业都走向信息化道路,汽车逆向物流也是如此,走向了网络发展之路。一是用整数线性规划构建汽车逆向物流的网络混合的模型,二是设计了汽车逆向物流网络优化模型的启发式算法—基于遗传算法,三是验证网络算法是否有效,这一点是通过算例来实现的。文中从汽车逆向物流存在的问题基础上进行假设模型分析,针对企业逆向物流网络规划问题提出建设性的方法,以期在今后的同等研究中能够起到借鉴作用。

  20. Sequential Construction of Costly Networks

    Energy Technology Data Exchange (ETDEWEB)

    Gutfraind, Alexander [Los Alamos National Laboratory

    2011-01-01

    Natural disasters or attacks often disrupt infrastructure networks requiring a costly recovery. This motivates an optimization problem where the objecitve is to construct the nodes of a graph G(V;E), and the cost of each node is dependent on the number of its neighbors previously constructed, or more generally, any properties of the previously-completed subgraph. In this optimization problem the objective is to find a permutation of the nodes which results in the least construction cost. We prove that in the case where the cost of nodes is a convex function in the number of neighbors, the optimal construction sequence is to start at a single node and move outwards. We also introduce algorithms and heuristics for solving various instances of the problem. Those methods can be applied to help reduce the cost of recovering from disasters as well as to plan the deployment of new network infrastructure.

  1. CONSTRUCTION OF HUB-AND-SPOKE LOGISTICS NETWORK BASED ON TRAFFIC COST IN THE AREA AROUND POYANG LAKE%基于交通运输成本的环鄱阳湖区“轴-辐”物流网络构建研究

    Institute of Scientific and Technical Information of China (English)

    王鑫磊; 刘耀彬

    2013-01-01

    The development of the regional logistics industry plays an important role in the development of economic in the area around the Poyang Lake,and how to reduce logistics cost is the key of the industry.Thus,scientifically constructing a logistics network has a significant impact on the economic spatial pattern there.According to the characteristics of logistics system around lake,this paper puts forward the methods about hub-and-spoke logistics network based on traffic cost,and proposed the scientific analysis method considering the various transportation factors.The grid network analysis method is more scientific,and the method of potential energy is improved than the traditional model.In this paper,thirteen indicators were selected to establish a logistics network evaluation index system,and identify for each research unit of corresponding logistics comprehensive strength index with two main factors was identified.According to the index,the different levels of hub city were sorted and determined.Moreover,based on the weighted average travel time,the time cost for radiation limits of a hub city was measured by the potential energy model.Thus,it enabled the construct of hub-and-spoke logistics network in the area around the Poyang Lake.This study indicated that the logistics network had been formed in area around the Poyang Lake,with Nanchang for the first level hub city,Jiujiang,Nanchang County,Jingdezhen,Fuzhou,Zhangshu for the second level,and other counties for the third level.The space pattern of logistics network looked like Nanchang as the nuclear,and Jiujiang,Nanchang County,Jingdezhen,Fuzhou,Zhangshu as the five hearts in the area around the Poyang Lake.The radiation scope of Nanchang included all of the area around the Poyang Lake,and other five hub cities included the area around themselves.From the incidence of the logistics network,four main logistics axis had formed,such as Nanchang to Jiujiang,Nanchang to Jingdezhen,Nanchang to Fuzhou,and Nanchang to

  2. Logistics Mode and Network Planning for Recycle of Crop Straw Resources

    OpenAIRE

    Zhou, Lingyun; Gu, Weidong; Zhang, Qing

    2013-01-01

    To realize the straw biomass industrialized development, it should speed up building crop straw resource recycle logistics network, increasing straw recycle efficiency, and reducing straw utilization cost. On the basis of studying straw recycle process, this paper presents innovative concept and property of straw recycle logistics network, analyses design thinking of straw recycle logistics network, and works out straw recycle logistics mode and network topological structure. Finally, it come...

  3. Resource Allocation Optimization Model of Collaborative Logistics Network Based on Bilevel Programming

    Directory of Open Access Journals (Sweden)

    Xiao-feng Xu

    2017-01-01

    Full Text Available Collaborative logistics network resource allocation can effectively meet the needs of customers. It can realize the overall benefit maximization of the logistics network and ensure that collaborative logistics network runs orderly at the time of creating value. Therefore, this article is based on the relationship of collaborative logistics network supplier, the transit warehouse, and sellers, and we consider the uncertainty of time to establish a bilevel programming model with random constraints and propose a genetic simulated annealing hybrid intelligent algorithm to solve it. Numerical example shows that the method has stronger robustness and convergence; it can achieve collaborative logistics network resource allocation rationalization and optimization.

  4. Sustainable Logistics Network Modeling for Enterprise Supply Chain

    Directory of Open Access Journals (Sweden)

    Lan Zhu

    2017-01-01

    Full Text Available With the expansion of the study about green logistics, sustainable supply chain management (SSCM has appeared as a new concept in current economic circumstance. This paper studies the sustainability optimization of enterprise logistics network from a strategic perspective and proposes a multiobjective sustainable logistics optimization model considering three dimensions of sustainability: economy, environment, and society. In this model, the environment factor was measured with a Life Cycle Assessment (LCA method based on Chinese Life Cycle Database (CLCD, while for social factors, Sustainability Reporting Guidelines (GRI are utilized to quantify the social performance. Moreover, the model was solved with an adapted version of the ε-constraint method named augment constraint algorithm (AUGMENCON through GAMS software. The numerical experiment results of a computer manufacturer supply chain show that the proposed model is able to integrate all dimensions of sustainability and simultaneously prove the capability of AUGMENCON in providing a set of trade-off solutions for the decision makers to make different decisions under different environment and social requirements.

  5. Construction Logistics Improvements Using the SCOR Model - Tornet Case

    OpenAIRE

    Persson, Fredrik; Bengtsson, Jonas; Gustad, Örjan

    2010-01-01

    International audience; The cost for house production is rising in Sweden. Compared with other consumer goods, the cost for houses have had a steeper increase over the last decades. Initiatives such as Lean Construction and Prefabrication have emerged in the construction industry to reduce the cost of house production and thereby the cost of the house itself. These initiatives have collected a lot of ideas and tools from the automotive industry and a lot of good examples are emerging that lea...

  6. Research Situation and Thoughts on the Logistics Network System of Straw Supply Chain

    OpenAIRE

    Wang, Xue; CHANG Zhi-zhou; Wang, Xiao-hua

    2016-01-01

    Establishing and improving straw supply chain logistics network system is the premise and guarantee to achieve the industrial development of straw utilization. This paper summarized the relevant literatures, comparative analysed the transportation dispersion type and 2 kinds of intensive logistics modes. Intensive model is the inheritance and development of distributed logistics mode, from a long-time perspective, intensive logistics mode is more conducive to reduce logistics costs, improve t...

  7. An Optimal Hierarchical Decision Model for a Regional Logistics Network with Environmental Impact Consideration

    Directory of Open Access Journals (Sweden)

    Dezhi Zhang

    2014-01-01

    Full Text Available This paper proposes a new model of simultaneous optimization of three-level logistics decisions, for logistics authorities, logistics operators, and logistics users, for regional logistics network with environmental impact consideration. The proposed model addresses the interaction among the three logistics players in a complete competitive logistics service market with CO2 emission charges. We also explicitly incorporate the impacts of the scale economics of the logistics park and the logistics users’ demand elasticity into the model. The logistics authorities aim to maximize the total social welfare of the system, considering the demand of green logistics development by two different methods: optimal location of logistics nodes and charging a CO2 emission tax. Logistics operators are assumed to compete with logistics service fare and frequency, while logistics users minimize their own perceived logistics disutility given logistics operators’ service fare and frequency. A heuristic algorithm based on the multinomial logit model is presented for the three-level decision model, and a numerical example is given to illustrate the above optimal model and its algorithm. The proposed model provides a useful tool for modeling competitive logistics services and evaluating logistics policies at the strategic level.

  8. An optimal hierarchical decision model for a regional logistics network with environmental impact consideration.

    Science.gov (United States)

    Zhang, Dezhi; Li, Shuangyan; Qin, Jin

    2014-01-01

    This paper proposes a new model of simultaneous optimization of three-level logistics decisions, for logistics authorities, logistics operators, and logistics users, for regional logistics network with environmental impact consideration. The proposed model addresses the interaction among the three logistics players in a complete competitive logistics service market with CO2 emission charges. We also explicitly incorporate the impacts of the scale economics of the logistics park and the logistics users' demand elasticity into the model. The logistics authorities aim to maximize the total social welfare of the system, considering the demand of green logistics development by two different methods: optimal location of logistics nodes and charging a CO2 emission tax. Logistics operators are assumed to compete with logistics service fare and frequency, while logistics users minimize their own perceived logistics disutility given logistics operators' service fare and frequency. A heuristic algorithm based on the multinomial logit model is presented for the three-level decision model, and a numerical example is given to illustrate the above optimal model and its algorithm. The proposed model provides a useful tool for modeling competitive logistics services and evaluating logistics policies at the strategic level.

  9. An Optimal Hierarchical Decision Model for a Regional Logistics Network with Environmental Impact Consideration

    Science.gov (United States)

    Zhang, Dezhi; Li, Shuangyan

    2014-01-01

    This paper proposes a new model of simultaneous optimization of three-level logistics decisions, for logistics authorities, logistics operators, and logistics users, for regional logistics network with environmental impact consideration. The proposed model addresses the interaction among the three logistics players in a complete competitive logistics service market with CO2 emission charges. We also explicitly incorporate the impacts of the scale economics of the logistics park and the logistics users' demand elasticity into the model. The logistics authorities aim to maximize the total social welfare of the system, considering the demand of green logistics development by two different methods: optimal location of logistics nodes and charging a CO2 emission tax. Logistics operators are assumed to compete with logistics service fare and frequency, while logistics users minimize their own perceived logistics disutility given logistics operators' service fare and frequency. A heuristic algorithm based on the multinomial logit model is presented for the three-level decision model, and a numerical example is given to illustrate the above optimal model and its algorithm. The proposed model provides a useful tool for modeling competitive logistics services and evaluating logistics policies at the strategic level. PMID:24977209

  10. Logistics Distribution Center Location Evaluation Based on Genetic Algorithm and Fuzzy Neural Network

    Science.gov (United States)

    Shao, Yuxiang; Chen, Qing; Wei, Zhenhua

    Logistics distribution center location evaluation is a dynamic, fuzzy, open and complicated nonlinear system, which makes it difficult to evaluate the distribution center location by the traditional analysis method. The paper proposes a distribution center location evaluation system which uses the fuzzy neural network combined with the genetic algorithm. In this model, the neural network is adopted to construct the fuzzy system. By using the genetic algorithm, the parameters of the neural network are optimized and trained so as to improve the fuzzy system’s abilities of self-study and self-adaptation. At last, the sampled data are trained and tested by Matlab software. The simulation results indicate that the proposed identification model has very small errors.

  11. Establishment of Agricultural Logistics Warehouse Receipt Pledge System in New Rural Construction

    Institute of Scientific and Technical Information of China (English)

    Yan; PANG; Jiage; ZHAI

    2014-01-01

    New rural construction needs a strong financial support. However,agriculture is a high-risk industry; one big obstacle restricting Chinese rural economic development is financing difficulty in the agricultural products producing and processing enterprises. This paper,on the foundation of analyzing the current situation of Chinese agricultural products market,with the theory of modern logistics finance,puts forward the approach of establishing Chinese agricultural products logistics pledge system,and illustrates the function of agricultural products logistics warehouse receipt pledge system in the new rural construction.

  12. Research on Reliability and Cost Integrated Optimization Algorithm of Construction Project Logistics System

    Directory of Open Access Journals (Sweden)

    Xiaoping Bai

    2013-01-01

    Full Text Available The structure of the construction project logistics system is decomposed in detail; some uncertain factors affecting system reliability are analyzed. This paper applies the probability-influence coordinate graph to screen out the logistics subsystem that has great influence on system reliability under the conditions of occurring failure, and establishes an allocation model of the reliability index in construction project logistics system based on the restriction of cost, makes use of the presented model and algorithm to calculate the cost-based reliability, contrasts it with the index reliability assigned by the scoring method to the optimal distribution value of reliability index and the optimal cost. The presented detailed methods and steps can offer the meaningful reference for reliability optimization management of the logistics system in the construction project.

  13. The concept of network organization and design of networks in logistics

    OpenAIRE

    Evtodieva, T. E.; Davydova, N. N.; Videneeva, S. V.; V. A. Fedorov; ФЕДОРОВ В.А.; ДАВЫДОВА Н.Н.

    2016-01-01

    The urgency of the analyzed problem is due to the dynamic development of the market, which requires businesses to establish long-term trust relationships, levels of internal hierarchy, to emphasize their core competencies and to build alliances with independent suppliers or distributors throughout the market chain, which is typical for the network business method. The purpose of the article is to examine the phenomenon of network organization in logistics and the development of the theory and...

  14. Global Logistic Network of Courier Services for the 21" Century

    Directory of Open Access Journals (Sweden)

    Ratko Zelenika

    2006-09-01

    Full Text Available The development of logistics has contributed a lot to all thebranches of economy. A successful economic subject cannotexist without a well-developed logistic branch. In economicsthe organization of logistics is becoming a strategic element regardingthe policy making of enterprises. Logistics belongs to anarea that will play an important role in our lives; therefore, thedevelopment of a logistic system is of an exceptional significancefor the economy and also for the non-economic sphere ofactivities. So, modem logistics enables us to bring into line differentinterests in management of material current. Global organizersof logistic services are developing and specializing insome essential services, such as combining of cargo into assemblyconsignments and also their distribution. The biggest globaltenderers of logistic services are considered, DHL, TNT,FEDEX, UPS ...

  15. Emerging global logistics networks : Implications for transport systems and policies

    NARCIS (Netherlands)

    Tavasszy, LA; Ruijgrok, CJ; Thissen, MJPM

    2003-01-01

    Logistics chains are constantly changing to facilitate increasingly global movements. In qualitative terms, long term trends in logistics services indicate a growing degree of product customization and an increased responsiveness in order delivery. These trends impact on the development of

  16. Logistics orchestration scenarios in a potted plant supply chain network

    NARCIS (Netherlands)

    Keizer, de M.; Groot, J.J.; Bloemhof, J.M.; Vorst, van der J.G.A.J.

    2014-01-01

    The Dutch potted plant sector has a dominant international position, but new marketing channels and emerging markets on distance call for new logistics concepts. This paper explores the potential of an advanced logistics concept, i.e. logistics orchestration, that aims for improved collaboration

  17. Logistics orchestration scenarios in a potted plant supply chain network

    NARCIS (Netherlands)

    Keizer, de M.; Groot, J.J.; Bloemhof, J.M.; Vorst, van der J.G.A.J.

    2014-01-01

    The Dutch potted plant sector has a dominant international position, but new marketing channels and emerging markets on distance call for new logistics concepts. This paper explores the potential of an advanced logistics concept, i.e. logistics orchestration, that aims for improved collaboration bet

  18. THE INFORMATIONAL SYSTEM FOR THE COLLABORATIVE LOGISTICS NETWORKS

    Directory of Open Access Journals (Sweden)

    NAIANA ŢARCĂ

    2011-01-01

    Full Text Available This paper presents an informatic system designed for collaborative logistic networks. The informational system is composed of structured informational modules that can easily be modified in order to facilitate the testing of the different algorithms that are being used. The informational system has two components, in the form of web application modules, which are connected to the user-specific modules (THE CLIENT WEB APPLICATION and to the server-specific modules (THE SERVER WEB APPLICATION, respectively. These two modules operate the transmission of information, the demands of the client and the offers generated by the server. The designed informational system has been tested in actual operating conditions, by co-optating ten EMSs from the Bihor county area. Some of the elements considered positive by the users, in the testing period, were: usability, the automatic assignment of a motor vehicle according to the characteristics of the product, the automatic route generation, the selection of goods according to the cluster “route” of the system.

  19. Information Theoretic Measures to Infer Feedback Dynamics in Coupled Logistic Networks

    Directory of Open Access Journals (Sweden)

    Allison Goodwell

    2015-10-01

    Full Text Available A process network is a collection of interacting time series nodes, in which interactions can range from weak dependencies to complete synchronization. Between these extremes, nodes may respond to each other or external forcing at certain time scales and strengths. Identification of such dependencies from time series can reveal the complex behavior of the system as a whole. Since observed time series datasets are often limited in length, robust measures are needed to quantify strengths and time scales of interactions and their unique contributions to the whole system behavior. We generate coupled chaotic logistic networks with a range of connectivity structures, time scales, noise, and forcing mechanisms, and compute variance and lagged mutual information measures to evaluate how detected time dependencies reveal system behavior. When a target node is detected to receive information from multiple sources, we compute conditional mutual information and total shared information between each source node pair to identify unique or redundant sources. While variance measures capture synchronization trends, combinations of information measures provide further distinctions regarding drivers, redundancies, and time dependencies within the network. We find that imposed network connectivity often leads to induced feedback that is identified as redundant links, and cannot be distinguished from imposed causal linkages. We find that random or external driving nodes are more likely to provide unique information than mutually dependent nodes in a highly connected network. In process networks constructed from observed data, the methods presented can be used to infer connectivity, dominant interactions, and systemic behavioral shift.

  20. Logistics at the Amazon forest: the challenge of Urucu-Manaus pipeline construction

    Energy Technology Data Exchange (ETDEWEB)

    Freitas, Ricardo Magalhaes; Araujo, Jorge Marques de; Barbosa, Gilberto Rodrigues; Campos, Marcos Zeferino Teixeira [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil)

    2009-07-01

    The predominant difficulties and logistics complexities at the Amazon Region, required of the technical body responsible for the construction of the Undertaking Urucu-Manaus Pipeline, technological knowledge and a profound background of the regional particularities, qualities that were determinants for the execution of this significant work. The logistics solutions, supported on an accurate and adequate planning for people, equipment and material mobilization for several front services, were planned considering the constant climatic variables, river flood and dry periods and with the monitoring daily routines of the communities located around the pipeline construction influence area. (author)

  1. Emerging global logistics networks : Implications for transport systems and policies

    NARCIS (Netherlands)

    Tavasszy, LA; Ruijgrok, CJ; Thissen, MJPM

    2003-01-01

    Logistics chains are constantly changing to facilitate increasingly global movements. In qualitative terms, long term trends in logistics services indicate a growing degree of product customization and an increased responsiveness in order delivery. These trends impact on the development of technolog

  2. Automatic Thesaurus Construction Using Bayesian Networks.

    Science.gov (United States)

    Park, Young C.; Choi, Key-Sun

    1996-01-01

    Discusses automatic thesaurus construction and characterizes the statistical behavior of terms by using an inference network. Highlights include low-frequency terms and data sparseness, Bayesian networks, collocation maps and term similarity, constructing a thesaurus from a collocation map, and experiments with test collections. (Author/LRW)

  3. NETWORK-CENTRIC WARFARE AND SOME PARTICULAR ASPECTS OF LOGISTICS BASED ON NETWORKING

    Directory of Open Access Journals (Sweden)

    Petrişor JALBĂ

    2015-04-01

    Full Text Available Within the framework of the current revolution in military affairs, at the End of the Cold War a new concept was born: the concept of War Based on Computer Networking or NCW Network Centric-Warfare which was established as a central element of modern military operations. Determined by theprogress recorded in the field of communication systems of all types, technology of information (HI-Tech, IT, war based on computer networking brings a change in the war paradigm and its inherent components In this respect, logistics based on computer networking represents one of the ways in which the reality of the battlefield is preserved which enhances the joint perspective upon the military forces.

  4. Simulation Modeling and Statistical Network Tools for Improving Collaboration in Military Logistics

    Science.gov (United States)

    2008-10-01

    AFRL-RH-WP-TR-2009-0110 Simulation Modeling and Statistical Network Tools for Improving Collaboration in Military Logistics...SUBTITLE Simulation Modeling and Statistical Network Tools for Improving Collaboration in Military Logistics 5a. CONTRACT NUMBER FA8650-07-1-6848...8 1 1.0 SUMMARY This final technical report describes the research findings of the project Simulation Modeling and Statistical Network

  5. Research Situation and Thoughts on the Logistics Network System of Straw Supply Chain

    Directory of Open Access Journals (Sweden)

    WANG Xue

    2016-01-01

    Full Text Available Establishing and improving straw supply chain logistics network system is the premise and guarantee to achieve the industrial development of straw utilization. This paper summarized the relevant literatures, comparative analysed the transportation dispersion type and 2 kinds of intensive logistics modes. Intensive model is the inheritance and development of distributed logistics mode, from a long-time perspective, intensive logistics mode is more conducive to reduce logistics costs, improve the economic benefits of straw supply chain network. The qualitative and quantitative analysis methods for the location of straw storage and transportation were summarized, and the combination of qualitative and quantitative analysis methods was needed. Three levels of evaluation index system of straw logistics mode selection were put forward, and the reliability evaluation method of straw supply chain logistics network was proposed, which provides a systematic and comprehensive decision-making method for the selection of straw logistics mode. At the same time, the paper put forward that we should strengthen the research on the network system, intelligent, information of the straw logistics, and promote the industrialization of the straw and the evolution of the market.

  6. A mathematical model for optimization of an integrated network logistic design

    Directory of Open Access Journals (Sweden)

    Lida Tafaghodi

    2011-10-01

    Full Text Available In this study, the integrated forward/reverse logistics network is investigated, and a capacitated multi-stage, multi-product logistics network design is proposed by formulating a generalized logistics network problem into a mixed-integer nonlinear programming model (MINLP for minimizing the total cost of the closed-loop supply chain network. Moreover, the proposed model is solved by using optimization solver, which provides the decisions related to the facility location problem, optimum quantity of shipped product, and facility capacity. Numerical results show the power of the proposed MINLP model to avoid th sub-optimality caused by separate design of forward and reverse logistics networks and to handle various transportation modes and periodic demand.

  7. Modeling and Optimization of Food Cold-chain Intelligent Logistics Distribution Network

    Directory of Open Access Journals (Sweden)

    Wuxue Jiang

    2015-03-01

    Full Text Available Aiming at improving the efficiency of food cold-chain logistics network, shortening the logistic time of food and reducing the logistics cost of food, this study analyzes the optimization strategy and various cost factors of the supply network of food cold chain and establishes and expands a kind of logistics network model adapting to the food cold-chain logistics. We use an improved genetic algorithm to solve the model and design an effective coding scheme, through the modified adaptive crossover probability and mutation probability, we integrate them into the elitism strategy, which has effectively avoided the prematurity of the algorithm and improved the operation efficiency of the algorithm. In the same instance, compared with the simple genetic algorithm, this study puts forward that the average running time and the average iteration number of the improved genetic algorithm have reduced nearly 50%, which has proved the feasibility and the effectiveness of the model and the algorithm.

  8. Research on robust optimization of emergency logistics network considering the time dependence characteristic

    Science.gov (United States)

    WANG, Qingrong; ZHU, Changfeng; LI, Ying; ZHANG, Zhengkun

    2017-06-01

    Considering the time dependence of emergency logistic network and complexity of the environment that the network exists in, in this paper the time dependent network optimization theory and robust discrete optimization theory are combined, and the emergency logistics dynamic network optimization model with characteristics of robustness is built to maximize the timeliness of emergency logistics. On this basis, considering the complexity of dynamic network and the time dependence of edge weight, an improved ant colony algorithm is proposed to realize the coupling of the optimization algorithm and the network time dependence and robustness. Finally, a case study has been carried out in order to testify validity of this robustness optimization model and its algorithm, and the value of different regulation factors was analyzed considering the importance of the value of the control factor in solving the optimal path. Analysis results show that this model and its algorithm above-mentioned have good timeliness and strong robustness.

  9. Construction of risk prediction model of type 2 diabetes mellitus based on logistic regression

    Directory of Open Access Journals (Sweden)

    Li Jian

    2017-01-01

    Full Text Available Objective: to construct multi factor prediction model for the individual risk of T2DM, and to explore new ideas for early warning, prevention and personalized health services for T2DM. Methods: using logistic regression techniques to screen the risk factors for T2DM and construct the risk prediction model of T2DM. Results: Male’s risk prediction model logistic regression equation: logit(P=BMI × 0.735+ vegetables × (−0.671 + age × 0.838+ diastolic pressure × 0.296+ physical activity× (−2.287 + sleep ×(−0.009 +smoking ×0.214; Female’s risk prediction model logistic regression equation: logit(P=BMI ×1.979+ vegetables× (−0.292 + age × 1.355+ diastolic pressure× 0.522+ physical activity × (−2.287 + sleep × (−0.010.The area under the ROC curve of male was 0.83, the sensitivity was 0.72, the specificity was 0.86, the area under the ROC curve of female was 0.84, the sensitivity was 0.75, the specificity was 0.90. Conclusion: This study model data is from a compared study of nested case, the risk prediction model has been established by using the more mature logistic regression techniques, and the model is higher predictive sensitivity, specificity and stability.

  10. Comprehensive Logistics

    CERN Document Server

    Gudehus, Timm

    2012-01-01

    Modern logistics comprises operative logistics, analytical logistics and management of logistic networks. Central task of operative logistics is the efficient supply of required goods at the right place within the right time. Tasks of analytical logistics are designing optimal networks and systems, developing strategies for planning, scheduling and operation, and organizing efficient order and performance processes. Logistic management plans, implements and operates logistic networks and schedules orders, stocks and resources. This reference-book offers a unique survey of modern logistics. It contains proven strategies, rules and tools for the solution of a multitude of logistic problems. The analytically derived algorithms and formulas can be used for the computer-based planning of logistic systems and for the dynamic scheduling of orders and resources in supply networks. They enable significant improvements of performance, quality and costs. Their application is demonstrated by several examples from industr...

  11. Application of statistical distribution theory to launch-on-time for space construction logistic support

    Science.gov (United States)

    Morgenthaler, George W.

    1989-01-01

    The ability to launch-on-time and to send payloads into space has progressed dramatically since the days of the earliest missile and space programs. Causes for delay during launch, i.e., unplanned 'holds', are attributable to several sources: weather, range activities, vehicle conditions, human performance, etc. Recent developments in space program, particularly the need for highly reliable logistic support of space construction and the subsequent planned operation of space stations, large unmanned space structures, lunar and Mars bases, and the necessity of providing 'guaranteed' commercial launches have placed increased emphasis on understanding and mastering every aspect of launch vehicle operations. The Center of Space Construction has acquired historical launch vehicle data and is applying these data to the analysis of space launch vehicle logistic support of space construction. This analysis will include development of a better understanding of launch-on-time capability and simulation of required support systems for vehicle assembly and launch which are necessary to support national space program construction schedules. In this paper, the author presents actual launch data on unscheduled 'hold' distributions of various launch vehicles. The data have been supplied by industrial associate companies of the Center for Space Construction. The paper seeks to determine suitable probability models which describe these historical data and that can be used for several purposes such as: inputs to broader simulations of launch vehicle logistic space construction support processes and the determination of which launch operations sources cause the majority of the unscheduled 'holds', and hence to suggest changes which might improve launch-on-time. In particular, the paper investigates the ability of a compound distribution probability model to fit actual data, versus alternative models, and recommends the most productive avenues for future statistical work.

  12. Application of statistical distribution theory to launch-on-time for space construction logistic support

    Science.gov (United States)

    Morgenthaler, George W.

    1989-01-01

    The ability to launch-on-time and to send payloads into space has progressed dramatically since the days of the earliest missile and space programs. Causes for delay during launch, i.e., unplanned 'holds', are attributable to several sources: weather, range activities, vehicle conditions, human performance, etc. Recent developments in space program, particularly the need for highly reliable logistic support of space construction and the subsequent planned operation of space stations, large unmanned space structures, lunar and Mars bases, and the necessity of providing 'guaranteed' commercial launches have placed increased emphasis on understanding and mastering every aspect of launch vehicle operations. The Center of Space Construction has acquired historical launch vehicle data and is applying these data to the analysis of space launch vehicle logistic support of space construction. This analysis will include development of a better understanding of launch-on-time capability and simulation of required support systems for vehicle assembly and launch which are necessary to support national space program construction schedules. In this paper, the author presents actual launch data on unscheduled 'hold' distributions of various launch vehicles. The data have been supplied by industrial associate companies of the Center for Space Construction. The paper seeks to determine suitable probability models which describe these historical data and that can be used for several purposes such as: inputs to broader simulations of launch vehicle logistic space construction support processes and the determination of which launch operations sources cause the majority of the unscheduled 'holds', and hence to suggest changes which might improve launch-on-time. In particular, the paper investigates the ability of a compound distribution probability model to fit actual data, versus alternative models, and recommends the most productive avenues for future statistical work.

  13. MODELS AND METHODS FOR LOGISTICS HUB LOCATION: A REVIEW TOWARDS TRANSPORTATION NETWORKS DESIGN

    Directory of Open Access Journals (Sweden)

    Carolina Luisa dos Santos Vieira

    Full Text Available ABSTRACT Logistics hubs affect the distribution patterns in transportation networks since they are flow-concentrating structures. Indeed, the efficient moving of goods throughout supply chains depends on the design of such networks. This paper presents a literature review on the logistics hub location problem, providing an outline of modeling approaches, solving techniques, and their applicability to such context. Two categories of models were identified. While multi-criteria models may seem best suited to find optimal locations, they do not allow an assessment of the impact of new hubs on goods flow and on the transportation network. On the other hand, single-criterion models, which provide location and flow allocation information, adopt network simplifications that hinder an accurate representation of the relationshipbetween origins, destinations, and hubs. In view of these limitations we propose future research directions for addressing real challenges of logistics hubs location regarding transportation networks design.

  14. THE GLOBAL MARITIME PORTS IN LOGISTICS CHAINS AND SUPPLY NETWORKS

    Directory of Open Access Journals (Sweden)

    Henryk SALMONOWICZ

    2014-12-01

    Full Text Available This article applies to the new role of seaports in the global economy and logistics. The paper presents trends in the development of the world economy and the dynamics of global trade. Attention was drawn to the role of different modes of transport to use global trade, especially on transcontinental nature of sea and air transport. The influence of the processes taking place in the global economy on a new role of seaports in the mass movement of cargo between points of origin and reception.

  15. Logistic centres in the Hungarian traffic network -A Current Smvey

    Directory of Open Access Journals (Sweden)

    Geza Schubert

    2003-07-01

    Full Text Available As Europe's economic integration proceeds, Hungary- situatedin the continent's geometric centre - is called upon to accommodatea huge volume of transit traffic. Congestion on thecountry's highways, already a serious problem, makes it desirableto shift transit freight traffic onto railways. For this purpose,and also to make transportation generally more efficient,the so-called logistic service centres are being established. Theseare expected to play a decisive role in the European freight trafficnetwork. An expeditious extension of their services is urgentlyneeded.

  16. A Lyapunov-Razumikhin approach for stability analysis of logistics networks with time-delays

    Science.gov (United States)

    Dashkovskiy, Sergey; Karimi, Hamid Reza; Kosmykov, Michael

    2012-05-01

    Logistics network represents a complex system where different elements that are logistic locations interact with each other. This interaction contains delays caused by time needed for delivery of the material. Complexity of the system, time-delays and perturbations in a customer demand may cause unstable behaviour of the network. This leads to the loss of the customers and high inventory costs. Thus the investigation of the network on stability is desired during its design. In this article we consider local input-to-state stability of such logistics networks. Their behaviour is described by a functional differential equation with a constant time-delay. We are looking for verifiable conditions that guarantee stability of the network under consideration. Lyapunov-Razumikhin functions and the local small gain condition are utilised to obtain such conditions. Our stability conditions for the logistics network are based on the information about the interconnection properties between logistic locations and their production rates. Finally, numerical results are provided to demonstrate the proposed approach.

  17. Sustainable reverse logistics network design for household plastic waste

    NARCIS (Netherlands)

    Bing, X.; Bloemhof, J.M.; Vorst, van der J.G.A.J.

    2014-01-01

    Plastic recycling is a legal requirement and can yield environmental benefits. In the Netherlands, there is a complex network of various collection methods, separation centers, sorting centers and reprocessors. The first step of the recycling system, separating plastics from other waste, can occur w

  18. Sustainable reverse logistics network design for household plastic waste

    NARCIS (Netherlands)

    Bing, X.; Bloemhof, J.M.; Vorst, van der J.G.A.J.

    2014-01-01

    Plastic recycling is a legal requirement and can yield environmental benefits. In the Netherlands, there is a complex network of various collection methods, separation centers, sorting centers and reprocessors. The first step of the recycling system, separating plastics from other waste, can occur

  19. Intensification of Development of Mixed Transportation of Freight in Ukraine through Formation of the Network of Transportation and Logistic Centres and Transportation and Logistic Clusters

    Directory of Open Access Journals (Sweden)

    Karpenko Oksana O.

    2013-11-01

    Full Text Available Development of mixed transportation is a prospective direction of development of the transportation system of Ukraine. The article analyses the modern state of development of mixed transportation of freight in Ukraine. The most popular types of combined transportation (refers to multi-modal are container and contrailer trains, which are formed both in Ukraine (Viking and Yaroslav and in other countries, first of all, Belarus (Zubr. One of the reasons of underdevelopment of mixed transportation of freight in Ukraine is absence of a developed network of transportation and logistic centres. The article offers to form a network of transportation and logistic centres in Ukraine as a way of intensification of development of mixed transportations of freight, since they facilitate co-ordination of use of various types of transport and support integrated management of material flows. Transportation and logistic centres should become a start-up complex, around which transportation and logistic clusters would be gradually formed. Transportation and logistic clusters is a new efficient form of network organisation and management of transportation and logistic services and they also ensure growth of efficiency of use of the regional transportation and logistic potential of Ukraine. The article shows prospective supporting transportation and logistic centres and centres of formation of transportation and logistic clusters in the territory of Ukraine. Formation of efficient transportation and logistic system of Ukraine on the basis of a network of transportation and logistic clusters would facilitate entering of Ukraine into the world transportation environment and would allow acceleration of introduction of efficient logistic schemes of freight delivery, in particular, mixed transportation of freight.

  20. Comparison of artificial neural networks with logistic regression for detection of obesity.

    Science.gov (United States)

    Heydari, Seyed Taghi; Ayatollahi, Seyed Mohammad Taghi; Zare, Najaf

    2012-08-01

    Obesity is a common problem in nutrition, both in the developed and developing countries. The aim of this study was to classify obesity by artificial neural networks and logistic regression. This cross-sectional study comprised of 414 healthy military personnel in southern Iran. All subjects completed questionnaires on their socio-economic status and their anthropometric measures were measured by a trained nurse. Classification of obesity was done by artificial neural networks and logistic regression. The mean age±SD of participants was 34.4 ± 7.5 years. A total of 187 (45.2%) were obese. In regard to logistic regression and neural networks the respective values were 80.2% and 81.2% when correctly classified, 80.2 and 79.7 for sensitivity and 81.9 and 83.7 for specificity; while the area under Receiver-Operating Characteristic (ROC) curve were 0.888 and 0.884 and the Kappa statistic were 0.600 and 0.629 for logistic regression and neural networks model respectively. We conclude that the neural networks and logistic regression both were good classifier for obesity detection but they were not significantly different in classification.

  1. A multimodal logistics service network design with time windows and environmental concerns

    Science.gov (United States)

    Zhang, Dezhi; He, Runzhong; Wang, Zhongwei

    2017-01-01

    The design of a multimodal logistics service network with customer service time windows and environmental costs is an important and challenging issue. Accordingly, this work established a model to minimize the total cost of multimodal logistics service network design with time windows and environmental concerns. The proposed model incorporates CO2 emission costs to determine the optimal transportation mode combinations and investment selections for transfer nodes, which consider transport cost, transport time, carbon emission, and logistics service time window constraints. Furthermore, genetic and heuristic algorithms are proposed to set up the abovementioned optimal model. A numerical example is provided to validate the model and the abovementioned two algorithms. Then, comparisons of the performance of the two algorithms are provided. Finally, this work investigates the effects of the logistics service time windows and CO2 emission taxes on the optimal solution. Several important management insights are obtained. PMID:28934272

  2. A multimodal logistics service network design with time windows and environmental concerns.

    Science.gov (United States)

    Zhang, Dezhi; He, Runzhong; Li, Shuangyan; Wang, Zhongwei

    2017-01-01

    The design of a multimodal logistics service network with customer service time windows and environmental costs is an important and challenging issue. Accordingly, this work established a model to minimize the total cost of multimodal logistics service network design with time windows and environmental concerns. The proposed model incorporates CO2 emission costs to determine the optimal transportation mode combinations and investment selections for transfer nodes, which consider transport cost, transport time, carbon emission, and logistics service time window constraints. Furthermore, genetic and heuristic algorithms are proposed to set up the abovementioned optimal model. A numerical example is provided to validate the model and the abovementioned two algorithms. Then, comparisons of the performance of the two algorithms are provided. Finally, this work investigates the effects of the logistics service time windows and CO2 emission taxes on the optimal solution. Several important management insights are obtained.

  3. Vehicle Routing Problem Solving Method for a Cooperative Logistics Network by Using Multi-Stage GA

    Science.gov (United States)

    Onoyama, Takashi; Maekawa, Takuya; Kubota, Sen; Tsuruta, Setsuo; Komoda, Norihisa

    A GA applied VRP (Vehicle Routing Problem) solving-method which realizes optimization of a cooperative logistics network is proposed. For this optimization a VRP solving-method that can obtain human expert-level solution, which realizes steady logistics operation, in interactive response time is required. The multi-stage GA enables to obtain the accurate solution under both hard and weak time constraints in interactive response time. Moreover, to realize the stable logistics operation, the daily fluctuation of shipping volume is taken into the fitness value of each individual in GA. The experimental result reveals the proposed method obtains the accurate solution that realizes the stable operation in interactive response time.

  4. Railway optimal network simulation for the development of regional transport-logistics system

    Directory of Open Access Journals (Sweden)

    Mikhail Borisovich Petrov

    2013-12-01

    Full Text Available The dependence of logistics on mineral fuel is a stable tendency of regions development, though when making strategic plans of logistics in the regions, it is necessary to provide the alternative possibilities of power-supply sources change together with population density, transport infrastructure peculiarities, and demographic changes forecast. On the example of timber processing complex of the Sverdlovsk region, the authors suggest the algorithm of decision of the optimal logistics infrastructure allocation. The problem of regional railway network organization at the stage of slow transition from the prolonged stagnation to the new development is carried out. The transport networks’ configurations of countries on the Pacific Rim, which successfully developed nowadays, are analyzed. The authors offer some results of regional transport network simulation on the basis of artificial intelligence method. These methods let to solve the task with incomplete data. The ways of the transport network improvement in the Sverdlovsk region are offered.

  5. A fuzzy multi-objective optimization model for sustainable reverse logistics network design

    DEFF Research Database (Denmark)

    Govindan, Kannan; Paam, Parichehr; Abtahi, Amir Reza

    2016-01-01

    a multi-echelon multi-period multi-objective model for a sustainable reverse logistics network. To reflect all aspects of sustainability, we try to minimize the present value of costs, as well as environmental impacts, and optimize the social responsibility as objective functions of the model. In order......Decreasing the environmental impact, increasing the degree of social responsibility, and considering the economic motivations of organizations are three significant features in designing a reverse logistics network under sustainability respects. Developing a model, which can simultaneously consider...

  6. Construction Research of Cloud Logistics Service Platform in Logistics Park%物流园区云物流服务平台的构建研究

    Institute of Scientific and Technical Information of China (English)

    盛维龙; 程腊梅

    2014-01-01

    In order to improve work efficiency and service level of logistics park ,cloud logistics service based on the cloud computing will be applicated .This paper introduces the concept of cloud computing and cloud logistics services ,and designs a model of logistics service system of logistics park based on the cloud service ,and then analysises the structure of cloud logistics services platform from a technical point.At last,we use a practical example to explain how the platform were constructed and operated.%为提高物流园区的工作效率和服务水平,引入了以云计算为基础的云物流。文中介绍了云计算及云物流的概念,根据物流园区作业流程,构建了一种基于云服务的物流园区服务系统模型,并在此基础上给出了云物流服务平台的技术构架,最后以案例分析说明了云物流的构建和应用。

  7. Часть 1. Transport logistics in terms of Olympics venue construction in Sochi

    Directory of Open Access Journals (Sweden)

    Valentin A. Babaev

    2011-05-01

    Full Text Available The article highlights one of the possible methods of solving logistic problems concerning construction of Olympics-2014 venues in Sochi. Focuses on mathematical programming of the aspect.

  8. 论高校绿色后勤建设%On Construction of Green University Logistics

    Institute of Scientific and Technical Information of China (English)

    刘晓青

    2014-01-01

    Recently, Construction of Green universities, which focuses mainly on green logistics, is the most important goal for univer-sities. Departments of Logistic administration and construction are the organizer, builder and runner of green campuses, which have three functions including realizer of environment education, practitioner of green technology, and undertaker of green campus. To fulfill such purposes, it is necessary to carry out a comprehensive "green education", and promote energy-saving awareness and environment protec-tion, of which such four green moves as logistic administration and services, campus infrastructure, campus afforestation, and campus envi-ronment administration are the focuses.%在新的时期,以绿色后勤建设为主要内容的绿色大学建设成为各高校最重要的工作目标。高校后勤管理和建设部门是绿色校园的组织者、建设者和运营者,具有实现环境教育功能、参与实践绿色科技和承担绿色校园建设的三重作用。为推进绿色后勤建设,就必须积极开展全面绿色教育,全面推进节能环保建设,着力于后勤管理服务、校园基础建设、校园绿化建设、校园环境管理四个绿色化建设。

  9. Predicting drug-target interactions by dual-network integrated logistic matrix factorization

    Science.gov (United States)

    Hao, Ming; Bryant, Stephen H.; Wang, Yanli

    2017-01-01

    In this work, we propose a dual-network integrated logistic matrix factorization (DNILMF) algorithm to predict potential drug-target interactions (DTI). The prediction procedure consists of four steps: (1) inferring new drug/target profiles and constructing profile kernel matrix; (2) diffusing drug profile kernel matrix with drug structure kernel matrix; (3) diffusing target profile kernel matrix with target sequence kernel matrix; and (4) building DNILMF model and smoothing new drug/target predictions based on their neighbors. We compare our algorithm with the state-of-the-art method based on the benchmark dataset. Results indicate that the DNILMF algorithm outperforms the previously reported approaches in terms of AUPR (area under precision-recall curve) and AUC (area under curve of receiver operating characteristic) based on the 5 trials of 10-fold cross-validation. We conclude that the performance improvement depends on not only the proposed objective function, but also the used nonlinear diffusion technique which is important but under studied in the DTI prediction field. In addition, we also compile a new DTI dataset for increasing the diversity of currently available benchmark datasets. The top prediction results for the new dataset are confirmed by experimental studies or supported by other computational research.

  10. Implementation of Genetic Algorithm in Network Modelling of Multi-level Reverse Logistics for Single Product

    Directory of Open Access Journals (Sweden)

    Siva Prasad Darla

    2014-08-01

    Full Text Available In this study, a multi level reverse logistics network is developed for a single product. Reverse logistics is a logistic activity beginning from intake of products returned by customers to selling of remanufactured or new products in market; so, it is considered that reverse flow of used products is from various sources like customers, dealers, retailers, manufacturers, etc., to remanufacturer and followed by transportation to secondary market. Due to uncertainties, any traditional supply chain approach to identify potential manufacturing facilities in this situation cannot be employed. Hence, Genetic Algorithm (GA is used for optimization and minimization of various costs involved in reverse logistics process. A sample numerical data is considered to test performance of the proposed model.

  11. MODELING AND ROBUST DESIGN OF REMANUFACTURING LOGISTICS NETWORKS BASED ON DESIGN OF EXPERIMENT

    Institute of Scientific and Technical Information of China (English)

    Xia Shouchang; Xi Lifeng; Hu Zongwu

    2004-01-01

    The uncertainty of time, quantity and quality of recycling products leads to the bad stability and flexibility of remanufacturing logistics networks, and general design only covered the minimizing logistics cost, thus, robust design is presented here to solve the uncertainty. The mathematical model of remanufacturing logistics networks is built based on stochastic distribution of uncontrollable factors, and robust objectives are presented. The integration of mathematical simulation and design of experiment method is performed to do sensitive analysis. The influence of each factor and level on the system is investigated, and the main factors and optimum combination are studied. The numbers of factors, level of each factor and design process of experiment are investigated as well. Finally, the process of robust design based on design of experiment is demonstrated by a detailed example.

  12. Combining the Performance Strengths of the Logistic Regression and Neural Network Models: A Medical Outcomes Approach

    Directory of Open Access Journals (Sweden)

    Wun Wong

    2003-01-01

    Full Text Available The assessment of medical outcomes is important in the effort to contain costs, streamline patient management, and codify medical practices. As such, it is necessary to develop predictive models that will make accurate predictions of these outcomes. The neural network methodology has often been shown to perform as well, if not better, than the logistic regression methodology in terms of sample predictive performance. However, the logistic regression method is capable of providing an explanation regarding the relationship(s between variables. This explanation is often crucial to understanding the clinical underpinnings of the disease process. Given the respective strengths of the methodologies in question, the combined use of a statistical (i.e., logistic regression and machine learning (i.e., neural network technology in the classification of medical outcomes is warranted under appropriate conditions. The study discusses these conditions and describes an approach for combining the strengths of the models.

  13. Evolutionary biosemiotics and multilevel construction networks.

    Science.gov (United States)

    Sharov, Alexei A

    2016-12-01

    In contrast to the traditional relational semiotics, biosemiotics decisively deviates towards dynamical aspects of signs at the evolutionary and developmental time scales. The analysis of sign dynamics requires constructivism (in a broad sense) to explain how new components such as subagents, sensors, effectors, and interpretation networks are produced by developing and evolving organisms. Semiotic networks that include signs, tools, and subagents are multilevel, and this feature supports the plasticity, robustness, and evolvability of organisms. The origin of life is described here as the emergence of simple self-constructing semiotic networks that progressively increased the diversity of their components and relations. Primitive organisms have no capacity to classify and track objects; thus, we need to admit the existence of proto-signs that directly regulate activities of agents without being associated with objects. However, object recognition and handling became possible in eukaryotic species with the development of extensive rewritable epigenetic memory as well as sensorial and effector capacities. Semiotic networks are based on sequential and recursive construction, where each step produces components (i.e., agents, scaffolds, signs, and resources) that are needed for the following steps of construction. Construction is not limited to repair and reproduction of what already exists or is unambiguously encoded, it also includes production of new components and behaviors via learning and evolution. A special case is the emergence of new levels of organization known as metasystem transition. Multilevel semiotic networks reshape the phenotype of organisms by combining a mosaic of features developed via learning and evolution of cooperating and/or conflicting subagents.

  14. Modelling the Cost Performance of a Given Logistics Network Operating Under Regular and Irregular Conditions

    NARCIS (Netherlands)

    Janic, M.

    2009-01-01

    This paper develops an analytical model for the assessment of the cost performance of a given logistics network operating under regular and irregular (disruptive) conditions. In addition, the paper aims to carry out a sensitivity analysis of this cost with respect to changes of the most influencing

  15. Determine the optimal carrier selection for a logistics network based on multi-commodity reliability criterion

    Science.gov (United States)

    Lin, Yi-Kuei; Yeh, Cheng-Ta

    2013-05-01

    From the perspective of supply chain management, the selected carrier plays an important role in freight delivery. This article proposes a new criterion of multi-commodity reliability and optimises the carrier selection based on such a criterion for logistics networks with routes and nodes, over which multiple commodities are delivered. Carrier selection concerns the selection of exactly one carrier to deliver freight on each route. The capacity of each carrier has several available values associated with a probability distribution, since some of a carrier's capacity may be reserved for various orders. Therefore, the logistics network, given any carrier selection, is a multi-commodity multi-state logistics network. Multi-commodity reliability is defined as a probability that the logistics network can satisfy a customer's demand for various commodities, and is a performance indicator for freight delivery. To solve this problem, this study proposes an optimisation algorithm that integrates genetic algorithm, minimal paths and Recursive Sum of Disjoint Products. A practical example in which multi-sized LCD monitors are delivered from China to Germany is considered to illustrate the solution procedure.

  16. Comparison of a Bayesian Network with a Logistic Regression Model to Forecast IgA Nephropathy

    Directory of Open Access Journals (Sweden)

    Michel Ducher

    2013-01-01

    Full Text Available Models are increasingly used in clinical practice to improve the accuracy of diagnosis. The aim of our work was to compare a Bayesian network to logistic regression to forecast IgA nephropathy (IgAN from simple clinical and biological criteria. Retrospectively, we pooled the results of all biopsies (n=155 performed by nephrologists in a specialist clinical facility between 2002 and 2009. Two groups were constituted at random. The first subgroup was used to determine the parameters of the models adjusted to data by logistic regression or Bayesian network, and the second was used to compare the performances of the models using receiver operating characteristics (ROC curves. IgAN was found (on pathology in 44 patients. Areas under the ROC curves provided by both methods were highly significant but not different from each other. Based on the highest Youden indices, sensitivity reached (100% versus 67% and specificity (73% versus 95% using the Bayesian network and logistic regression, respectively. A Bayesian network is at least as efficient as logistic regression to estimate the probability of a patient suffering IgAN, using simple clinical and biological data obtained during consultation.

  17. Comparison of a Bayesian network with a logistic regression model to forecast IgA nephropathy.

    Science.gov (United States)

    Ducher, Michel; Kalbacher, Emilie; Combarnous, François; Finaz de Vilaine, Jérome; McGregor, Brigitte; Fouque, Denis; Fauvel, Jean Pierre

    2013-01-01

    Models are increasingly used in clinical practice to improve the accuracy of diagnosis. The aim of our work was to compare a Bayesian network to logistic regression to forecast IgA nephropathy (IgAN) from simple clinical and biological criteria. Retrospectively, we pooled the results of all biopsies (n = 155) performed by nephrologists in a specialist clinical facility between 2002 and 2009. Two groups were constituted at random. The first subgroup was used to determine the parameters of the models adjusted to data by logistic regression or Bayesian network, and the second was used to compare the performances of the models using receiver operating characteristics (ROC) curves. IgAN was found (on pathology) in 44 patients. Areas under the ROC curves provided by both methods were highly significant but not different from each other. Based on the highest Youden indices, sensitivity reached (100% versus 67%) and specificity (73% versus 95%) using the Bayesian network and logistic regression, respectively. A Bayesian network is at least as efficient as logistic regression to estimate the probability of a patient suffering IgAN, using simple clinical and biological data obtained during consultation.

  18. Hybrid optimization and simulation to design a logistics network for distributing perishable products

    NARCIS (Netherlands)

    Keizer, de M.; Haijema, R.; Bloemhof-Ruwaard, J.M.; Vorst, van der J.G.A.J.

    2015-01-01

    Dynamics in product quality complicate the design of logistics networks for perishable products, like flowers and other agricultural products. Complications especially arise when multiple products from different origins have to come together for processes like bundling. This paper presents a new MIL

  19. Using ROC curves to compare neural networks and logistic regression for modeling individual noncatastrophic tree mortality

    Science.gov (United States)

    Susan L. King

    2003-01-01

    The performance of two classifiers, logistic regression and neural networks, are compared for modeling noncatastrophic individual tree mortality for 21 species of trees in West Virginia. The output of the classifier is usually a continuous number between 0 and 1. A threshold is selected between 0 and 1 and all of the trees below the threshold are classified as...

  20. Business case Oce: Reverse logistic network re-design for copiers

    NARCIS (Netherlands)

    Krikke, H.R.; van Harten, Aart; Schuur, Peter

    1999-01-01

    The introduction of extended producer responsibility forces Original Equipment Manufacturers to set up a logistic network for take back, processing and recovery of discarded products. In this paper, we discuss a business case study carried out at Océ, a copier firm in Venlo (NL). It concerns the

  1. Modelling the Cost Performance of a Given Logistics Network Operating Under Regular and Irregular Conditions

    NARCIS (Netherlands)

    Janic, M.

    2009-01-01

    This paper develops an analytical model for the assessment of the cost performance of a given logistics network operating under regular and irregular (disruptive) conditions. In addition, the paper aims to carry out a sensitivity analysis of this cost with respect to changes of the most influencing

  2. Structure-preserving model reduction of large-scale logistics networks. Applications for supply chains

    Science.gov (United States)

    Scholz-Reiter, B.; Wirth, F.; Dashkovskiy, S.; Makuschewitz, T.; Schönlein, M.; Kosmykov, M.

    2011-12-01

    We investigate the problem of model reduction with a view to large-scale logistics networks, specifically supply chains. Such networks are modeled by means of graphs, which describe the structure of material flow. An aim of the proposed model reduction procedure is to preserve important features within the network. As a new methodology we introduce the LogRank as a measure for the importance of locations, which is based on the structure of the flows within the network. We argue that these properties reflect relative importance of locations. Based on the LogRank we identify subgraphs of the network that can be neglected or aggregated. The effect of this is discussed for a few motifs. Using this approach we present a meta algorithm for structure-preserving model reduction that can be adapted to different mathematical modeling frameworks. The capabilities of the approach are demonstrated with a test case, where a logistics network is modeled as a Jackson network, i.e., a particular type of queueing network.

  3. A strategic decision support system for logistics and supply chain network design

    Indian Academy of Sciences (India)

    T BISWAS; SUSMITA SAMANTA

    2016-06-01

    This paper aims to develop a strategic decision support system for logistics and supply chain network design of a multi-stage, multi-commodity, and multi-period distribution and transportation system. A mixed integer linear programming model is proposed to tackle the problem while minimizing the operating,transportation and handling cost through all tiers of the supply chain network. A genetic algorithm based method has been proposed to solve the problem in a large scale realistic environment. The efficacy of the developed strategic decision support model in achieving better utilization of network and resources to fulfill the customer demand is demonstrated using illustrative scenarios inspired from the real case of a logistics company

  4. Construction of Network Management Information System of Agricultural Products Supply Chain Based on 3PLs

    OpenAIRE

    Gao, Shujin; Yang, Qiangxian

    2010-01-01

    The necessity to construct the network management information system of 3PLs agricultural supply chain is analyzed, showing that 3PLs can improve the overall competitive advantage of agricultural supply chain. 3PLs changes the homogeneity management into specialized management of logistics service and achieves the alliance of the subjects at different nodes of agricultural products supply chain. Network management information system structure of agricultural products supply chain based on 3PL...

  5. An inquiry into the characteristics, applicability and prerequisites of Radio-Frequency Identification (RFID solutions in transport networks and logistics

    Directory of Open Access Journals (Sweden)

    Antoniu Ovidiu Balint

    2013-09-01

    Full Text Available The use of intelligent solution represents the key factor for developing both the logistics sector and the economic environment. This paper analyses the Radio-Frequency Identification (RFID technology and its role in the Supply Chain Management (SCM especially in logistics and transport networks. The main objective is to demonstrate that RFID represents a solution for improving the transport networks and logistics sector by implementing various complex and intelligent solutions that can improve the actual economic environment

  6. Dynamics of delayed-coupled chaotic logistic maps: Influence of network topology, connectivity and delay times

    Indian Academy of Sciences (India)

    Arturo C Martí; Marcelo Ponce; Cristina Masoller

    2008-06-01

    We review our recent work on the synchronization of a network of delay-coupled maps, focusing on the interplay of the network topology and the delay times that take into account the finite velocity of propagation of interactions. We assume that the elements of the network are identical ( logistic maps in the regime where the individual maps, without coupling, evolve in a chaotic orbit) and that the coupling strengths are uniform throughout the network. We show that if the delay times are su±ciently heterogeneous, for adequate coupling strength the network synchronizes in a spatially homogeneous steady state, which is unstable for the individual maps without coupling. This synchronization behavior is referred to as `suppression of chaos by random delays' and is in contrast with the synchronization when all the interaction delay times are homogeneous, because with homogeneous delays the network synchronizes in a state where the elements display in-phase time-periodic or chaotic oscillations. We analyze the influence of the network topology considering four different types of networks: two regular (a ring-type and a ring-type with a central node) and two random (free-scale Barabasi-Albert and small-world Newman-Watts). We find that when the delay times are sufficiently heterogeneous the synchronization behavior is largely independent of the network topology but depends on the network's connectivity, i.e., on the average number of neighbors per node.

  7. Manufacturing plant location selection in logistics network using Analytic Hierarchy Process

    Directory of Open Access Journals (Sweden)

    Ping-Yu Chang

    2015-11-01

    Full Text Available Purpose: In recent years, numerous companies have moved their manufacturing plants to China to capitalize on lower cost and tax. Plant location has such an impact on cost, stocks, and logistics network but location selection in the company is usually based on subjective preference of high ranking managers. Such a decision-making process might result in selecting a location with a lower fixed cost but a higher operational cost. Therefore, this research adapts real data from an electronics company to develop a framework that incorporates both quantitative and qualitative factors for selecting new plant locations. Design/methodology/approach: In-depth interviews were conducted with 12 high rank managers (7 of them are department manager, 2 of them are vice-president, 1 of them is senior engineer, and 2 of them are plant manager in the departments of construction, finance, planning, production, and warehouse to determine the important factors. A questionnaire survey is then conducted for comparing factors which are analyzed using the Analytic Hierarchy Process (AHP. Findings: Results show that the best location chosen by the developed framework coincides well with the company’s primal production base. The results have been presented to the company’s high ranking managers for realizing the accuracy of the framework. Positive responses of the managers indicate usefulness of implementing the proposed model into reality, which adds to the value of this research. Practical implications: The proposed framework can save numerous time-consuming meetings called to compromise opinions and conflictions from different departments in location selection. Originality/value: This paper adapts the Analytic Hierarchy Process (AHP to incorporate quantitative and qualitative factors which are obtained through in-depth interviews with high rank managers in a company into the location decision.

  8. The Construction of Cold-Chain Logistics Park of Agricultural Products in Sanshui from Two-stage Perspective

    Institute of Scientific and Technical Information of China (English)

    Jianhui; HUANG; Wei; WANG; Quan; LI

    2015-01-01

    This paper firstly analyzed the operation model,market positioning,market demand forecast as well as market competition and challenges,park site selection,and transportation conditions for construction of the Cold-Chain Logistics Park of Agricultural Products in Sanshui.Then,it presented the overall planning scheme for construction of the Cold-Chain Logistics Park of Agricultural Products from a progressive two-stage perspective of overall planning and stage-by-stage implementation.The first stage mainly performs the function as a transaction platform of agricultural products and meanwhile provides customers with agricultural products storage and inspection services.The second stage adds value-added services such as distribution processing,modified atmosphere storage,freezing and refrigeration,market price information distribution,E-commerce of agricultural products and personalized services.It is expected to provide references and suggestions for the construction of the Cold-Chain Logistics Park of Agricultural Products.

  9. Design of a Multiobjective Reverse Logistics Network Considering the Cost and Service Level

    Directory of Open Access Journals (Sweden)

    Shuang Li

    2012-01-01

    Full Text Available Reverse logistics, which is induced by various forms of used products and materials, has received growing attention throughout this decade. In a highly competitive environment, the service level is an important criterion for reverse logistics network design. However, most previous studies about product returns only focused on the total cost of the reverse logistics and neglected the service level. To help a manufacturer of electronic products provide quality postsale repair service for their consumer, this paper proposes a multiobjective reverse logistics network optimisation model that considers the objectives of the cost, the total tardiness of the cycle time, and the coverage of customer zones. The Nondominated Sorting Genetic Algorithm II (NSGA-II is employed for solving this multiobjective optimisation model. To evaluate the performance of NSGA-II, a genetic algorithm based on weighted sum approach and Multiobjective Simulated Annealing (MOSA are also applied. The performance of these three heuristic algorithms is compared using numerical examples. The computational results show that NSGA-II outperforms MOSA and the genetic algorithm based on weighted sum approach. Furthermore, the key parameters of the model are tested, and some conclusions are drawn.

  10. A Multi-Stage Reverse Logistics Network Problem by Using Hybrid Priority-Based Genetic Algorithm

    Science.gov (United States)

    Lee, Jeong-Eun; Gen, Mitsuo; Rhee, Kyong-Gu

    Today remanufacturing problem is one of the most important problems regarding to the environmental aspects of the recovery of used products and materials. Therefore, the reverse logistics is gaining become power and great potential for winning consumers in a more competitive context in the future. This paper considers the multi-stage reverse Logistics Network Problem (m-rLNP) while minimizing the total cost, which involves reverse logistics shipping cost and fixed cost of opening the disassembly centers and processing centers. In this study, we first formulate the m-rLNP model as a three-stage logistics network model. Following for solving this problem, we propose a Genetic Algorithm pri (GA) with priority-based encoding method consisting of two stages, and introduce a new crossover operator called Weight Mapping Crossover (WMX). Additionally also a heuristic approach is applied in the 3rd stage to ship of materials from processing center to manufacturer. Finally numerical experiments with various scales of the m-rLNP models demonstrate the effectiveness and efficiency of our approach by comparing with the recent researches.

  11. Comparison of Artificial Neural Networks and Logistic Regression Analysis in the Credit Risk Prediction

    Directory of Open Access Journals (Sweden)

    Hüseyin BUDAK

    2012-11-01

    Full Text Available Credit scoring is a vital topic for Banks since there is a need to use limited financial sources more effectively. There are several credit scoring methods that are used by Banks. One of them is to estimate whether a credit demanding customer’s repayment order will be regular or not. In this study, artificial neural networks and logistic regression analysis have been used to provide a support to the Banks’ credit risk prediction and to estimate whether a credit demanding customers’ repayment order will be regular or not. The results of the study showed that artificial neural networks method is more reliable than logistic regression analysis while estimating a credit demanding customer’s repayment order.

  12. Considering on Construction of Information Platform of Military Logistics Integration%对军事物流一体化信息平台建设的思考

    Institute of Scientific and Technical Information of China (English)

    宫志萍; 刘金彪; 张智文

    2011-01-01

    研究了美军在军事物流信息化建设方面的基本做法:强化核心信息系统建设,实现军事物流可视化;坚持标准化和系列化;打造可视化后勤网络,实现军事物流运作信息的实时获取;开发联合决策支持工具。阐述了美军的做法时我军的启示,并就我军开展军事物流一体化信息平台建设的总体目标、总体要求、主要内容、技术实现思路和需要解决的关键技术问题等方面,提出了宏观思路和总体构想。%The basic approaches of US military logistics informationization construction were introduced, which were strengthening core information system construction and realizing military logistics visibility, standardization and serialization, building visible logistics network and real time acquiring of the information of military logistics operation, and developing joint decision support tools. The inspirations of the approaches US army were discussed. Macro ideas and overall visions of carrying out military logistics information platform construction were put forward, including overall goals, overall requirements, main content, technical implementation ideas, and the key technical problems needed to be solved.

  13. Logistic growth for the Nuzi cuneiform tablets: Analyzing family networks in ancient Mesopotamia

    Science.gov (United States)

    Ueda, Sumie; Makino, Kumi; Itoh, Yoshiaki; Tsuchiya, Takashi

    2015-03-01

    We reconstruct the published year of each cuneiform tablet of the Nuzi society in ancient Mesopotamia. The tablets are on land transaction, marriage, loan, slavery contracts, etc. The number of tablets seems to increase by logistic growth. It may show the dynamics of concentration of lands or other properties into few powerful families in a period of about sixty years and most of them are in about thirty years. We reconstruct family trees and social networks of Nuzi and estimate the published years of cuneiform tablets consistently with the trees and networks, formulating least squares problems with linear inequality constraints.

  14. Study on Forecasting of Agricultural Produce Logistics Demand of Xinjiang Construction Corps%兵团农产品物流需求预测研究

    Institute of Scientific and Technical Information of China (English)

    成观雄; 朱叶; 喻晓玲

    2014-01-01

    探讨了兵团农产品物流发展现状、存在问题及其制约因素。运用灰色模型和神经网络两种方法对兵团农产品物流需求进行预测,并进行了组合预测,具有一定的实际意义。%In this paper, we discussed the current status, existing problems and restricting factors of the agricultural produce logistics of the Xinjiang Construction Corps, then used the grey model and neural network to forecast the demand for agricultural produce logistics by the Corps, and at the end, performed a combination forecasting which was of certain practical significance.

  15. Automatic Construction of Hierarchical Road Networks

    Science.gov (United States)

    Yang, Weiping

    2016-06-01

    This paper describes an automated method of constructing a hierarchical road network given a single dataset, without the presence of thematic attributes. The method is based on a pattern graph which maintains nodes and paths as junctions and through-traffic roads. The hierarchy is formed incrementally in a top-down fashion for highways, ramps, and major roads directly connected to ramps; and bottom-up for the rest of major and minor roads. Through reasoning and analysis, ramps are identified as unique characteristics for recognizing and assembling high speed roads. The method makes distinctions on the types of ramps by articulating their connection patterns with highways. Major and minor roads will be identified by both quantitative and qualitative analysis of spatial properties and by discovering neighbourhood patterns revealed in the data. The result of the method would enrich data description and support comprehensive queries on sorted exit or entry points on highways and their related roads. The enrichment on road network data is important to a high successful rate of feature matching for road networks and to geospatial data integration.

  16. Constructive Thoughts on Chinese Army Logistics Equipment%论我军后勤装备建设思想

    Institute of Scientific and Technical Information of China (English)

    马小平

    2012-01-01

    This paper summarizes the historic and realistic, theoretical and practical, professional and comprehensive fea tures of logistics equipment constructive thoughts. It analyzes the ideological content regarding the development, applica tion, management and supplying of the logistics equipment in details. It generalizes the experiences and achievements of the Chinese army logistics equipment construction from a theoretical perspective.%总结了后勤装备建设思想的历史性与现实性、理论性与实践性、专业性与综合性的特征,详细分析了我军后勤装备发展、运用、管理和保障的思想内容,从理论角度概括了我军后勤装备建设的经验成果。

  17. Selected aspects of the logistics network of public hospitals in the competitive market of health services

    Directory of Open Access Journals (Sweden)

    Justyna Majchrzak-Lepczyk

    2016-12-01

    Full Text Available Background: The below considerations provide an overview of the issues of sustainable development, logistics, to financial engineering instruments and the role of intellectual capital in the process of transformation of public hospitals. The aim of this research was to assess the competitiveness of the network of public hospitals in the market of health services based on literature studies, as well as empirical research. Methods: Empirical study using a questionnaire survey was conducted in the period from January 2007 to December 2011, in the area of Warmia and Mazury, Pomerania and Wielkopolska. The goal of this questionnaire survey was to know the medical staff reviews issues related to adaptation to the nature of the network of public hospitals methods and logistics tools, sustainable development, corporate social responsibility - CSR. The study was carried out in 104 public hospitals, on a sample of 8975 respondents. Results and conclusions: Analysis of the completed study showed that the logistic processes and their improvement in the health sector play a significant role. The surveyed entities explicitly draw attention to the need for information systems,  pro-environment activities, access to information, or the use of GS1 global standards. These tools allow you to increase the efficiency of supply chains, ensuring not only tracking and tracing of products from the manufacturer to the patient, but also enabling better protection against making a mistake or counterfeit products.

  18. Logistics orchestration in the ornamental plant supply chain network: towards responsive and differentiated demand driven networks

    NARCIS (Netherlands)

    Vorst, van der J.G.A.J.; Duineveld, M.P.J.; Scheer, F.P.

    2007-01-01

    At the moment the Dutch ornamental plant sector has a dominant international position fulfilling about 44% of the European market. However, emerging markets are positioned at a great distance requiring new logistics concepts to operate efficiently and effectively, new marketing channels become appar

  19. Pb-free production of telecommunication network equipment: Technological and logistical challenges

    Energy Technology Data Exchange (ETDEWEB)

    Michel, H.J. [Siemens AG, ICN M and L TDC CE MC, Bruchsal (Germany)

    2004-07-01

    Legislation in Europe and China will ban the use of SnPb solder in electronic devices by July 2006. Even though there will be an exemption for telecommunication network infrastructure equipment, component market and supply chain issues will nevertheless affect such high-tech products, and strongly influence logistics during the transition to ''Pb-free.'' The Siemens group ''Information and Communication Networks'' (ICN) produces high-technology modules for telecommunication networks. To prepare for cost-effective conversion to lead-free within ICN, an interdisciplinary team was formed. The presentation highlights critical issues and shows how the team is proceeding to confront them. (orig.)

  20. Logistics orchestration in the ornamental plant supply chain network: towards responsive and differentiated demand driven networks

    OpenAIRE

    Vorst, van der, H.A.; Duineveld, M.P.J.; Scheer, F.P.

    2007-01-01

    At the moment the Dutch ornamental plant sector has a dominant international position fulfilling about 44% of the European market. However, emerging markets are positioned at a great distance requiring new logistics concepts to operate efficiently and effectively, new marketing channels become apparent which require increased responsiveness and product diversification, and new competitors like Spain and Italy are entering the arena. If no action is taken, the Dutch might loose their renowned ...

  1. CALS Test Network Sacramento Air Logistics Center. CALS/EDI Transfer Test Number 2, Quick Short Test Report.

    Science.gov (United States)

    2007-11-02

    McClellan AFB , CA. The test required CALS data (MIL-R-28002A Raster) to be sent in an EDI (Electronic Data Interchange) envelope over a commercial VAN...Livermore National Laboratory EC/EDI (Electronic Commerce Through Electronic Data Interchange) Project, and the Sacramento Air Logistics Center (SM-ALC...Value Added Network). CALS Test Network Sacramento Air Logistics Center CALS/EDI Data Transfer Test Number 2 Quick Short Test Report.

  2. Constructal tree networks for heat transfer

    Energy Technology Data Exchange (ETDEWEB)

    Ledezma, G.A.; Bejan, A.; Errera, M.R. [Department of Mechanical Engineering and Materials Science, Box 90300, Duke University, Durham, North Carolina 27708-0300 (United States)

    1997-07-01

    This paper addresses the fundamental problem of how to connect a heat generating volume to a point heat sink by using a finite amount of high-conductivity material that can be distributed through the volume. The problem is one of optimizing the access (or minimizing the thermal resistance) between a finite-size volume and one point. The solution is constructed by covering the volume with a sequence of building blocks, which proceeds toward larger sizes (assemblies), hence, the {open_quotes}constructal{close_quotes} name for this approach. Optimized numerically at each stage are geometric features such as the overall shape of the building block, its number of constituents, and the internal distribution of high-conductivity inserts. It is shown that in the optimal design, the high-conductivity material has a distribution with the shape of a tree. Every aspect of the tree architecture is deterministic: the shapes of the largest assembly and all its constituents, the number of branches at each level of assembly, the relative position of building blocks in each assembly, and the relative thicknesses of successive branches. The finer, innermost details of the tree architecture (e.g., the branching angle) have a negligible effect on the overall thermal resistance. The main conclusion is that the structure, working mechanism, and minimal resistance of the tree network can be obtained deterministically, and that the constrained optimization of access routes accounts for the macroscopic structure in nature. {copyright} {ital 1997 American Institute of Physics.}

  3. Study on Logistics Enterprise Knowledge Network Based on Social Network Theory%基于社会网络理论的物流企业知识网络研究

    Institute of Scientific and Technical Information of China (English)

    孙源

    2013-01-01

    基于社会网络理论对物流企业的知识网络进行了研究.基于社会网络分析,从网络的结构特征和关系特征入手,构建物流企业的知识网络,从理论角度丰富和完善了物流企业知识管理研究.%In this paper, on the basis of the social network theory, we studied the knowledge network of the logistics enterprises and then through social network analysis and starting from its structural and relational characteristics, constructed the knowledge network of these enterprises, theoretically enriching and completing the researches on knowledge management of logistics enterprises.

  4. A hybrid solution approach for a multi-objective closed-loop logistics network under uncertainty

    Science.gov (United States)

    Mehrbod, Mehrdad; Tu, Nan; Miao, Lixin

    2014-09-01

    The design of closed-loop logistics (forward and reverse logistics) has attracted growing attention with the stringent pressures of customer expectations, environmental concerns and economic factors. This paper considers a multi-product, multi-period and multi-objective closed-loop logistics network model with regard to facility expansion as a facility location-allocation problem, which more closely approximates real-world conditions. A multi-objective mixed integer nonlinear programming formulation is linearized by defining new variables and adding new constraints to the model. By considering the aforementioned model under uncertainty, this paper develops a hybrid solution approach by combining an interactive fuzzy goal programming approach and robust counterpart optimization based on three well-known robust counterpart optimization formulations. Finally, this paper compares the results of the three formulations using different test scenarios and parameter-sensitive analysis in terms of the quality of the final solution, CPU time, the level of conservatism, the degree of closeness to the ideal solution, the degree of balance involved in developing a compromise solution, and satisfaction degree.

  5. Multimodal Logistics Network Design over Planning Horizon through a Hybrid Meta-Heuristic Approach

    Science.gov (United States)

    Shimizu, Yoshiaki; Yamazaki, Yoshihiro; Wada, Takeshi

    Logistics has been acknowledged increasingly as a key issue of supply chain management to improve business efficiency under global competition and diversified customer demands. This study aims at improving a quality of strategic decision making associated with dynamic natures in logistics network optimization. Especially, noticing an importance to concern with a multimodal logistics under multiterms, we have extended a previous approach termed hybrid tabu search (HybTS). The attempt intends to deploy a strategic planning more concretely so that the strategic plan can link to an operational decision making. The idea refers to a smart extension of the HybTS to solve a dynamic mixed integer programming problem. It is a two-level iterative method composed of a sophisticated tabu search for the location problem at the upper level and a graph algorithm for the route selection at the lower level. To keep efficiency while coping with the resulting extremely large-scale problem, we invented a systematic procedure to transform the original linear program at the lower-level into a minimum cost flow problem solvable by the graph algorithm. Through numerical experiments, we verified the proposed method outperformed the commercial software. The results indicate the proposed approach can make the conventional strategic decision much more practical and is promising for real world applications.

  6. Artificial neural network, genetic algorithm, and logistic regression applications for predicting renal colic in emergency settings.

    Science.gov (United States)

    Eken, Cenker; Bilge, Ugur; Kartal, Mutlu; Eray, Oktay

    2009-06-03

    Logistic regression is the most common statistical model for processing multivariate data in the medical literature. Artificial intelligence models like an artificial neural network (ANN) and genetic algorithm (GA) may also be useful to interpret medical data. The purpose of this study was to perform artificial intelligence models on a medical data sheet and compare to logistic regression. ANN, GA, and logistic regression analysis were carried out on a data sheet of a previously published article regarding patients presenting to an emergency department with flank pain suspicious for renal colic. The study population was composed of 227 patients: 176 patients had a diagnosis of urinary stone, while 51 ultimately had no calculus. The GA found two decision rules in predicting urinary stones. Rule 1 consisted of being male, pain not spreading to back, and no fever. In rule 2, pelvicaliceal dilatation on bedside ultrasonography replaced no fever. ANN, GA rule 1, GA rule 2, and logistic regression had a sensitivity of 94.9, 67.6, 56.8, and 95.5%, a specificity of 78.4, 76.47, 86.3, and 47.1%, a positive likelihood ratio of 4.4, 2.9, 4.1, and 1.8, and a negative likelihood ratio of 0.06, 0.42, 0.5, and 0.09, respectively. The area under the curve was found to be 0.867, 0.720, 0.715, and 0.713 for all applications, respectively. Data mining techniques such as ANN and GA can be used for predicting renal colic in emergency settings and to constitute clinical decision rules. They may be an alternative to conventional multivariate analysis applications used in biostatistics.

  7. A Methodology to Exploit Profit Allocation in Logistics Joint Distribution Network Optimization

    Directory of Open Access Journals (Sweden)

    Yong Wang

    2015-01-01

    Full Text Available Logistics joint distribution network (LJDN optimization involves vehicle routes scheduling and profit allocation for multiple distribution centers. This is essentially a combinational and cooperative game optimization problem seeking to serve a number of customers with a fleet of vehicles and allocate profit among multiple centers. LJDN routing optimization based on customer clustering units can alleviate the computational complexity and improve the calculation accuracy. In addition, the profit allocation mechanism can be realized based on cooperative game theory through a negotiation procedure by the Logistics Service Provider (LSP. This paper establishes a model to minimize the total cost of the multiple centers joint distribution network when each distribution center is assigned to serve a series of distribution units. An improved particle swarm optimization (PSO algorithm is presented to tackle the model formulation by assigning distribution centers (DCs to distribution units. Improved PSO algorithm combines merits of PSO algorithm and genetic algorithm (GA with global and local search capabilities. Finally, a Shapley value model based on cooperative game theory is proposed to obtain the optimal profit allocation strategy among distribution centers from nonempty coalitions. The computational results from a case study in Guiyang city, China, suggest the optimal sequential coalition of distribution centers can be achieved according to Strictly Monotonic Path (SMP.

  8. Research on Cross-border Logistics Network Construction and Industry Linkage Development Based on the "Belt and Road" Strategy--The Top-level Design of Integration Field Theory%基于“一带一路”跨境物流网络构建的产业联动发展--集成场理论的顶层设计思路

    Institute of Scientific and Technical Information of China (English)

    董千里

    2015-01-01

    channel network,and so on. At the same time,we should,first,pay attention to cultivate or introduce the cross-border logistic integrator,and better organize the related business type,scale and pattern of realization;second,we should pay attention to improve the attraction of logistic integration of inland international hub base unclear;and third,we should pay attention to the connection and integration of the function of cross-border inland international hub,domestic geography centers,purchase centers,manufacturing centers, distribution centers and financial centers. Besides,we should also apply the knowledge chain to sustainable innovation in terms of the design and construction of connection key.

  9. Construction of the Korean VLBI Network (KVN)

    CERN Document Server

    Kim, H G; Sohn, B W; Oh, S J; Je, D H; Wi, S O; Song, M G

    2004-01-01

    Korea's new VLBI project to construct the Korean VLBI Network (KVN) started in 2001, as a 7-year project that is fully funded by our government. We plan to build 3 new high-precision radio telescopes of 21-m diameter in 3 places in Korea, which will be exclusively used for VLBI observations. We will install the 2/8, 22 and 43 GHz HEMT receivers within 2007 as a first target, and later we will expand the receiving frequency up to 86 and 129 GHz for astronomical, geodetic, and earth science VLBI research. The millimeter-wave VLBI will be the ultimate goal of KVN. For the front-ends, we are going to install a multi-channel receiver system that employs low-pass filters within a quasi-optical beam transportation system. This receiver system will give reliable phase calibrations for millimeter-wave VLBI as well as enable simultaneous multi-frequency band observations. The hard-disk type new Mark 5 will be used as the main recorder of KVN. We have completed the design of the KVN DAS system of 2 Gsps sampling rate, w...

  10. Location and logistics

    OpenAIRE

    Alumura, Sibel A.; Karab, Bahar Y.; Melo, M. Teresa

    2013-01-01

    Facility location decisions play a critical role in designing logistics networks. This article provides some guidelines on how location decisions and logistics functions can be integrated into a single mathematical model to optimize the configuration of a logistics network. This will be illustrated by two generic models, one supporting the design of a forward logistics network and the other addressing the specific requirements of a reverse logistics network. Several special cases and extensio...

  11. Location and logistics

    OpenAIRE

    Alumura, Sibel A.; Karab, Bahar Y.; Melo, M. Teresa

    2013-01-01

    Facility location decisions play a critical role in designing logistics networks. This article provides some guidelines on how location decisions and logistics functions can be integrated into a single mathematical model to optimize the configuration of a logistics network. This will be illustrated by two generic models, one supporting the design of a forward logistics network and the other addressing the specific requirements of a reverse logistics network. Several special cases and extensio...

  12. Manufacturing enterprise’s logistics operational cost simulation and optimization from the perspective of inter-firm network

    Directory of Open Access Journals (Sweden)

    Chun Fu

    2015-05-01

    Full Text Available Purpose: By studying the case of a Changsha engineering machinery manufacturing firm, this paper aims to find out the optimization tactics to reduce enterprise’s logistics operational cost. Design/methodology/approach: This paper builds the structure model of manufacturing enterprise’s logistics operational costs from the perspective of inter-firm network and simulates the model based on system dynamics. Findings: It concludes that applying system dynamics in the research of manufacturing enterprise’s logistics cost control can better reflect the relationship of factors in the system. And the case firm can optimize the logistics costs by implement joint distribution. Research limitations/implications: This study still lacks comprehensive consideration about the variables quantities and quantitative of the control factors. In the future, we should strengthen the collection of data and information about the engineering manufacturing firms and improve the logistics operational cost model. Practical implications: This study puts forward some optimization tactics to reduce enterprise’s logistics operational cost. And it is of great significance for enterprise’s supply chain management optimization and logistics cost control. Originality/value: Differing from the existing literatures, this paper builds the structure model of manufacturing enterprise’s logistics operational costs from the perspective of inter-firm network and simulates the model based on system dynamics.

  13. Using metaheuristic and fuzzy system for the optimization of material pull in a push-pull flow logistics network

    OpenAIRE

    Afshin Mehrsai; Hamid-Reza Karimi; Klaus-Dieter Thoben; Bernd Scholz-Reiter

    2013-01-01

    Alternative material flow strategies in logistics networks have crucial influences on the overall performance of the networks. Material flows can follow push, pull, or hybrid systems. To get the advantages of both push and pull flows in networks, the decoupling-point strategy is used as coordination mean. At this point, material pull has to get optimized concerning customer orders against pushed replenishment-rates. To compensate the ambiguity and uncertainty of both dynamic flows, fuzzy set ...

  14. Using Metaheuristic and Fuzzy System for the Optimization of Material Pull in a Push-Pull Flow Logistics Network

    OpenAIRE

    Afshin Mehrsai; Hamid-Reza Karimi; Klaus-Dieter Thoben; Bernd Scholz-Reiter

    2013-01-01

    Alternative material flow strategies in logistics networks have crucial influences on the overall performance of the networks. Material flows can follow push, pull, or hybrid systems. To get the advantages of both push and pull flows in networks, the decoupling-point strategy is used as coordination mean. At this point, material pull has to get optimized concerning customer orders against pushed replenishment-rates. To compensate the ambiguity and uncertainty of both dynamic flows, fuzzy set ...

  15. 流线网络的物流组织优化模型研究%Stream line network logistics organization optimization

    Institute of Scientific and Technical Information of China (English)

    彭永涛; 王坤; 李向前

    2012-01-01

    An abstract cost function of the streamline network is developed based on the basic features of the construction and operation of the streamline network. In order to lower the logistics cost and improve the logistics efficiency, an optimization model with capacity constraint is presented to minimize the total cost, including constructing cost and operating cost. The model is converted into a variational inequality, and the equivalence between the variational inequality and the solution of optimization model is proven. An optimum logistics organization scheme is obtained by solving the variational inequality. The results of a numerical example show reasonability and feasibility of the proposed model and method, and it can help enterprises operate their logistics network.%通过分析流线网络建设与运营的基本特征,构建了流线网络的抽象成本函数,为了降低物流成本和提高物流效率,建立以能力供给为约束,以网络建设和运营成本最小为目标的优化模型.将模型转化为相应的变分不等式,证明变分不等式与优化模型解的等价性,通过解变分不等式得到最优物流组织方案,算例验证了模型合理性和可行性,为企业对物流网络的经营提供理论支持.

  16. A Simple and Robust Gray Image Encryption Scheme Using Chaotic Logistic Map and Artificial Neural Network

    Directory of Open Access Journals (Sweden)

    Adelaïde Nicole Kengnou Telem

    2014-01-01

    Full Text Available A robust gray image encryption scheme using chaotic logistic map and artificial neural network (ANN is introduced. In the proposed method, an external secret key is used to derive the initial conditions for the logistic chaotic maps which are employed to generate weights and biases matrices of the multilayer perceptron (MLP. During the learning process with the backpropagation algorithm, ANN determines the weight matrix of the connections. The plain image is divided into four subimages which are used for the first diffusion stage. The subimages obtained previously are divided into the square subimage blocks. In the next stage, different initial conditions are employed to generate a key stream which will be used for permutation and diffusion of the subimage blocks. Some security analyses such as entropy analysis, statistical analysis, and key sensitivity analysis are given to demonstrate the key space of the proposed algorithm which is large enough to make brute force attacks infeasible. Computing validation using experimental data with several gray images has been carried out with detailed numerical analysis, in order to validate the high security of the proposed encryption scheme.

  17. Urban Growth Modelling with Artificial Neural Network and Logistic Regression. Case Study: Sanandaj City, Iran

    Directory of Open Access Journals (Sweden)

    SASSAN MOHAMMADY

    2013-01-01

    Full Text Available Cities have shown remarkable growth due to attraction, economic, social and facilities centralization in the past few decades. Population and urban expansion especially in developing countries, led to lack of resources, land use change from appropriate agricultural land to urban land use and marginalization. Under these circumstances, land use activity is a major issue and challenge for town and country planners. Different approaches have been attempted in urban expansion modelling. Artificial Neural network (ANN models are among knowledge-based models which have been used for urban growth modelling. ANNs are powerful tools that use a machine learning approach to quantify and model complex behaviour and patterns. In this research, ANN and logistic regression have been employed for interpreting urban growth modelling. Our case study is Sanandaj city and we used Landsat TM and ETM+ imageries acquired at 2000 and 2006. The dataset used includes distance to main roads, distance to the residence region, elevation, slope, and distance to green space. Percent Area Match (PAM obtained from modelling of these changes with ANN is equal to 90.47% and the accuracy achieved for urban growth modelling with Logistic Regression (LR is equal to 88.91%. Percent Correct Match (PCM and Figure of Merit for ANN method were 91.33% and 59.07% and then for LR were 90.84% and 57.07%, respectively.

  18. System evaluation of logistics performance: Proposal for a supply network in a Public Higher Education Institution

    Directory of Open Access Journals (Sweden)

    Alberto de Oliveira Cardoso Neto

    2017-06-01

    Full Text Available The recent quest for efficiency in public companies in Brazil was one of the motives to elaborate this paper, which had a public Institution of Higher Education (IHE as its subject of study. The IHE profiled possesses a multi-campus structure and the distribution of its consumer items is performed by the institution’s own warehouse. Through field research, it became apparent that the supply of these items had some problems, such as items out of stock, orders with delayed delivery, items past their shelf life etc. Therefore, this paper article aimed to propose an evaluation system of the logistical services at the IHE studied, based on performance indicators developed from mangers’ perceptions about the problems occurring in the distribution of consumer items. In addition, an index, calculated from diverse indicators, was proposed which would be able to express the performance of the logistics service of the IHE studied, and reflect the perceptions of the main users of this service. It is understood that the solution proposed here can be applied to any two-echelon supply network.

  19. Stegobot: construction of an unobservable communication network leveraging social behavior

    CERN Document Server

    Nagaraja, Shishir; Piyawongwisal, Pratch; Singh, Vijit; Agarwal, Pragya; Borisov, Nikita

    2011-01-01

    We propose the construction of an unobservable communications network using social networks. The communication endpoints are vertices on a social network. Probabilistically unobservable communication channels are built by leveraging image steganography and the social image sharing behavior of users. All communication takes place along the edges of a social network overlay connecting friends. We show that such a network can provide decent bandwidth even with a far from optimal routing mechanism such as restricted flooding. We show that such a network is indeed usable by constructing a botnet on top of it, called Stegobot. It is designed to spread via social malware attacks and steal information from its victims. Unlike conventional botnets, Stegobot traffic does not introduce new communication endpoints between bots. We analyzed a real-world dataset of image sharing between members of an online social network. Analysis of Stegobot's network throughput indicates that stealthy as it is, it is also functionally p...

  20. Constructing backbone network by using tinker algorithm

    Science.gov (United States)

    He, Zhiwei; Zhan, Meng; Wang, Jianxiong; Yao, Chenggui

    2017-01-01

    Revealing how a biological network is organized to realize its function is one of the main topics in systems biology. The functional backbone network, defined as the primary structure of the biological network, is of great importance in maintaining the main function of the biological network. We propose a new algorithm, the tinker algorithm, to determine this core structure and apply it in the cell-cycle system. With this algorithm, the backbone network of the cell-cycle network can be determined accurately and efficiently in various models such as the Boolean model, stochastic model, and ordinary differential equation model. Results show that our algorithm is more efficient than that used in the previous research. We hope this method can be put into practical use in relevant future studies.

  1. Discussion on Key Problems and Counter Measures of Logistics Management in Construction Supply Chains%工程供应链中物流管理的关键问题与对策研究

    Institute of Scientific and Technical Information of China (English)

    李真; 杜建国; 孟庆峰

    2014-01-01

    Construction supply chain logistics management is quite important for performance. Firstly,according to the actual operation of project logistics,we build a conceptual model of construction supply chain logistics management. The characteristic and key issues in process of construction supply chain logistics management are proposed. In order to improve performance of construction supply chain logistics management,some strategies are proposed: constructing logistics operation principles like"integration","coordination" and "sharing";unified planning logistics systems and building reliable logistics network;building strategic partnerships with suppliers and integrating logistics transport capacity;building information sharing mechanisms between construction contractor and materials supplier. Those strategies aim to provide a theoretical basis for improving logistics and supply chain management project performance.%工程供应链物流管理对于工程系统绩效具有十分重要的意义。根据工程物流的实际运作情况,构建出工程供应链物流管理的概念模型并对其进行系统分析。在此基础上,提出了工程供应链物流管理的特点及其面临的关键问题;并遵循工程供应链物流管理的协调优化思想给出几点策略建议:构建“集成”、“协调”与“共享”的物流运作原则;统一规划物流运作系统,构建可靠的物流运作网络;与供应商构建战略伙伴关系,整合物流运营商的运输能力;构建施工承包商与物资供应商的信息共享机制等,旨在为提高工程供应链中物流管理的绩效提供理论依据。

  2. Constructive feedforward neural networks using hermite polynomial activation functions.

    Science.gov (United States)

    Ma, Liying; Khorasani, K

    2005-07-01

    In this paper, a constructive one-hidden-layer network is introduced where each hidden unit employs a polynomial function for its activation function that is different from other units. Specifically, both a structure level as well as a function level adaptation methodologies are utilized in constructing the network. The functional level adaptation scheme ensures that the "growing" or constructive network has different activation functions for each neuron such that the network may be able to capture the underlying input-output map more effectively. The activation functions considered consist of orthonormal Hermite polynomials. It is shown through extensive simulations that the proposed network yields improved performance when compared to networks having identical sigmoidal activation functions.

  3. Study on Logistics Park EDI platform Construction%物流园区的EDI平台建设初探

    Institute of Scientific and Technical Information of China (English)

    袁惠莉

    2011-01-01

    从EDI的基本技术人手,介绍了EDI平台的相关概念;分析了物流园区EDI平台应具有的功能和可能的技术实现方案;最终得出搭建EDI平台与物流园区发展之间关系的结论.%The paper starts from the basic technology of EDI to introduce the related concepts of EDI platform and analyzes the necessary functions of a logistics park EDI platform and the technical solution. Finally it comments on the relationship between EDI platform construction and logistics park development.

  4. Comparison of logistic regression and artificial neural network in low back pain prediction: second national health survey.

    Science.gov (United States)

    Parsaeian, M; Mohammad, K; Mahmoudi, M; Zeraati, H

    2012-01-01

    The purpose of this investigation was to compare empirically predictive ability of an artificial neural network with a logistic regression in prediction of low back pain. Data from the second national health survey were considered in this investigation. This data includes the information of low back pain and its associated risk factors among Iranian people aged 15 years and older. Artificial neural network and logistic regression models were developed using a set of 17294 data and they were validated in a test set of 17295 data. Hosmer and Lemeshow recommendation for model selection was used in fitting the logistic regression. A three-layer perceptron with 9 inputs, 3 hidden and 1 output neurons was employed. The efficiency of two models was compared by receiver operating characteristic analysis, root mean square and -2 Loglikelihood criteria. The area under the ROC curve (SE), root mean square and -2Loglikelihood of the logistic regression was 0.752 (0.004), 0.3832 and 14769.2, respectively. The area under the ROC curve (SE), root mean square and -2Loglikelihood of the artificial neural network was 0.754 (0.004), 0.3770 and 14757.6, respectively. Based on these three criteria, artificial neural network would give better performance than logistic regression. Although, the difference is statistically significant, it does not seem to be clinically significant.

  5. Construction of Integrated Perception and Response in Military Logistics Systems%一体化感知与响应的军事物流体系建设研究

    Institute of Scientific and Technical Information of China (English)

    倪明仿; 辛涛; 郭小亮; 吴秀鹏

    2011-01-01

    提出构建一体化感知与响应的军事物流体系,详细阐述了其内涵及必要性,在此基础上,进一步提出构建思路,包括指导原则、总体目标及建设重点,最后指出还必须重视物流网络、物流要素以及物流运作等军事物流支撑体系建设,以期为提高部队军事物流保障能力提供参考.%The paper proposes to build a millitary logistics system capable of integrated perception and response. It first elaborates on its intension and entailment, then proceeds to introduces the construction plan, including guiding principles, general objectives, and construction priorities, and at the end, points out that constructions of military logistics support systems such as logistics network, logistics elements,and logistics operation, etc., should not be neglected.

  6. A unified constructive network model for problem-solving.

    Science.gov (United States)

    Takahashi, Y

    1996-01-01

    We develop a neural network model that relieves time-consuming trial-and-error computer experiments usually performed in problem-solving with networks where problems, including the traveling salesman problem, pattern matching and pattern classification/learning, are formulated as optimization problems with constraint. First, we specify and uniquely distinguish the model as a set of constituent functions that should comply with restrictive conditions. Next, we demonstrate that it is unified, i.e., it yields most current networks. Finally, we verify that it is constructive, that is, we show a standard method that systematically constructs from a given optimization problem a particular network in that model to solve it.

  7. Designing a Reverse Logistics Network for End-of-Life Vehicles Recovery

    Directory of Open Access Journals (Sweden)

    Masoud Zarei

    2010-01-01

    Full Text Available The environmental factors are receiving increasing attention in different life cycle stages of products. When a product reaches its End-Of-Life (EOL stage, the management of its recovery process is affected by the environmental and also economical factors. Selecting efficient methods for the collection and recovery of EOL products has become an important issue. The European Union Directive 2000/53/EC extends the responsibility of the vehicle manufacturers to the postconsumer stage of the vehicle. In order to fulfill the requirements of this Directive and also efficient management of the whole recovery process, the conceptual framework of a reverse logistics network is presented. The distribution of new vehicles in an area and also collecting the End-of-Life Vehicles (ELVs and their recovery are considered jointly. It is assumed that the new vehicles distributors are also responsible for collecting the ELVs. Then a mathematical model is developed which minimizes the costs of setting up the network and also the relevant transportation costs. Because of the complexity of the model, a solution methodology based on the genetic algorithm is designed which enables achieving good quality solutions in a reasonable algorithm run time.

  8. Discussion on The Construction of The Circumpacific Documents Information Network

    Institute of Scientific and Technical Information of China (English)

    ZhuYan

    1994-01-01

    While entering an information society, the humanity how to construct a circumpacific doctmlent information network has become an topic of conmmon interest to nations across the circumpacific. I think the following points are worth discussing:

  9. Incremental construction of LSTM recurrent neural network

    OpenAIRE

    Ribeiro, Evandsa Sabrine Lopes-Lima; Alquézar Mancho, René

    2002-01-01

    Long Short--Term Memory (LSTM) is a recurrent neural network that uses structures called memory blocks to allow the net remember significant events distant in the past input sequence in order to solve long time lag tasks, where other RNN approaches fail. Throughout this work we have performed experiments using LSTM networks extended with growing abilities, which we call GLSTM. Four methods of training growing LSTM has been compared. These methods include cascade and ...

  10. Constructing an Intelligent Patent Network Analysis Method

    Directory of Open Access Journals (Sweden)

    Chao-Chan Wu

    2012-11-01

    Full Text Available Patent network analysis, an advanced method of patent analysis, is a useful tool for technology management. This method visually displays all the relationships among the patents and enables the analysts to intuitively comprehend the overview of a set of patents in the field of the technology being studied. Although patent network analysis possesses relative advantages different from traditional methods of patent analysis, it is subject to several crucial limitations. To overcome the drawbacks of the current method, this study proposes a novel patent analysis method, called the intelligent patent network analysis method, to make a visual network with great precision. Based on artificial intelligence techniques, the proposed method provides an automated procedure for searching patent documents, extracting patent keywords, and determining the weight of each patent keyword in order to generate a sophisticated visualization of the patent network. This study proposes a detailed procedure for generating an intelligent patent network that is helpful for improving the efficiency and quality of patent analysis. Furthermore, patents in the field of Carbon Nanotube Backlight Unit (CNT-BLU were analyzed to verify the utility of the proposed method.

  11. Constructing minimum-cost flow-dependent networks

    Science.gov (United States)

    Thomas, Doreen A.; Weng, Jia F.

    2002-09-01

    In the construction of a communication network, the length of the network is an important but not unique factor determining the cost of the network. Among many possible network models, Gilbert proposed a flow-dependent model in which flow demands are assigned between each pair of points in a given point set A, and the cost per unit length of a link in the network is a function of the flow through the link. In this paper we first investigate the properties of this Gilbert model: the concavity of the cost function, decomposition, local minimality, the number of Steiner points and the maximum degree of Steiner points. Then we propose three heuristics for constructing minimum cost Gilbert networks. Two of them come from the fact that generally a minimum cost Gilbert network stands between two extremes: the complete network G(A) on A and the edge-weighted Steiner minimal tree W(A) on A. The first heuristic starts with G(A) and reduces the cost by splitting angles; the second one starts with both G(A) and W(A), and reduces the cost by selecting low cost paths. As a generalisation of the second heuristic, the third heuristic constructs a new Gilbert network of less cost by hybridising known Gilbert networks. Finally we discuss some considerations in practical applications.

  12. The Location Decisions of Foreign Logistics Firms in China : Does Transport Network Capacity Matter?

    OpenAIRE

    Anthony Chin; Hong Junjie

    2005-01-01

    In recent years the logistic needs have created tremendous pressure on the ‘hard’ transport infrastructure. Logistics and the harness of information technology are the key facilitators of mobility. The Chinese logistics market is still in its infancy and creates tremendous opportunities for investors. It recognized as one of important driving forces both for national economy and business. Beijing, Tianjin, Shanghai, Shenzhen and Guanzhou aspire to be regional or international logistics hubs a...

  13. Reverse logistics network for municipal solid waste management: The inclusion of waste pickers as a Brazilian legal requirement.

    Science.gov (United States)

    Ferri, Giovane Lopes; Chaves, Gisele de Lorena Diniz; Ribeiro, Glaydston Mattos

    2015-06-01

    This study proposes a reverse logistics network involved in the management of municipal solid waste (MSW) to solve the challenge of economically managing these wastes considering the recent legal requirements of the Brazilian Waste Management Policy. The feasibility of the allocation of MSW material recovery facilities (MRF) as intermediate points between the generators of these wastes and the options for reuse and disposal was evaluated, as well as the participation of associations and cooperatives of waste pickers. This network was mathematically modelled and validated through a scenario analysis of the municipality of São Mateus, which makes the location model more complete and applicable in practice. The mathematical model allows the determination of the number of facilities required for the reverse logistics network, their location, capacities, and product flows between these facilities. The fixed costs of installation and operation of the proposed MRF were balanced with the reduction of transport costs, allowing the inclusion of waste pickers to the reverse logistics network. The main contribution of this study lies in the proposition of a reverse logistics network for MSW simultaneously involving legal, environmental, economic and social criteria, which is a very complex goal. This study can guide practices in other countries that have realities similar to those in Brazil of accelerated urbanisation without adequate planning for solid waste management, added to the strong presence of waste pickers that, through the characteristic of social vulnerability, must be included in the system. In addition to the theoretical contribution to the reverse logistics network problem, this study aids in decision-making for public managers who have limited technical and administrative capacities for the management of solid wastes. Copyright © 2015 Elsevier Ltd. All rights reserved.

  14. Corporate and supply chain network governance of third party logistics service providers: Effects on buyers’ intention to continue the relationship

    Directory of Open Access Journals (Sweden)

    Salih Börteçine Avci

    2017-06-01

    Full Text Available This study focuses on the impact of corporate governance, supply chain network governance and competencies such as sales and logistics competence on buyers’ intention to relationship continuity. A total number of 258 questionnaires were distributed to Turkish manufacturing firms, selected using cross-sectional sampling method from the Istanbul and Edirne Chamber of Commerce and Industry in Turkey. The data of survey was analysed using PLS-SEM model with WARP PLS 5.0 software. Our findings indicate that corporate governance and supply chain network governance seem to have a positive effect on sales competence and logistics competence, and together, they influence buyers’ intention to relationship continuity. In this respect, the outcomes of this study may provide valuable insights for the third-party logistics (3PL literature in terms of buyers’ intention to relationship continuity.

  15. An Optimization Model for Expired Drug Recycling Logistics Networks and Government Subsidy Policy Design Based on Tri-level Programming

    Directory of Open Access Journals (Sweden)

    Hui Huang

    2015-07-01

    Full Text Available In order to recycle and dispose of all people’s expired drugs, the government should design a subsidy policy to stimulate users to return their expired drugs, and drug-stores should take the responsibility of recycling expired drugs, in other words, to be recycling stations. For this purpose it is necessary for the government to select the right recycling stations and treatment stations to optimize the expired drug recycling logistics network and minimize the total costs of recycling and disposal. This paper establishes a tri-level programming model to study how the government can optimize an expired drug recycling logistics network and the appropriate subsidy policies. Furthermore, a Hybrid Genetic Simulated Annealing Algorithm (HGSAA is proposed to search for the optimal solution of the model. An experiment is discussed to illustrate the good quality of the recycling logistics network and government subsides obtained by the HGSAA. The HGSAA is proven to have the ability to converge on the global optimal solution, and to act as an effective algorithm for solving the optimization problem of expired drug recycling logistics network and government subsidies.

  16. An Optimization Model for Expired Drug Recycling Logistics Networks and Government Subsidy Policy Design Based on Tri-level Programming.

    Science.gov (United States)

    Huang, Hui; Li, Yuyu; Huang, Bo; Pi, Xing

    2015-07-01

    In order to recycle and dispose of all people's expired drugs, the government should design a subsidy policy to stimulate users to return their expired drugs, and drug-stores should take the responsibility of recycling expired drugs, in other words, to be recycling stations. For this purpose it is necessary for the government to select the right recycling stations and treatment stations to optimize the expired drug recycling logistics network and minimize the total costs of recycling and disposal. This paper establishes a tri-level programming model to study how the government can optimize an expired drug recycling logistics network and the appropriate subsidy policies. Furthermore, a Hybrid Genetic Simulated Annealing Algorithm (HGSAA) is proposed to search for the optimal solution of the model. An experiment is discussed to illustrate the good quality of the recycling logistics network and government subsides obtained by the HGSAA. The HGSAA is proven to have the ability to converge on the global optimal solution, and to act as an effective algorithm for solving the optimization problem of expired drug recycling logistics network and government subsidies.

  17. 军事应急物流网络模型研究%Research on Military Emergency Logistics Network Model

    Institute of Scientific and Technical Information of China (English)

    陈军; 智军; 时光

    2015-01-01

    文中针对军事应急物流体系基础设施的基本特征,把军事应急物流中的专业设施和功能设施抽象为网络节点,按照连通性将网络节点之间的物流线路作为网络边,最终建立了多种运输方式联合运输条件下的物流保障网络模型,并对其基本特征进行了分析。%For the basic characteristics of the military infrastructure of emergency logistics system, the professional and functional facilities in the military emergency logistics are abstracted for the network node.According to the connectivity,logistics route between network nodes are set as network edge.Finally it establishes a logistics support network model and its basic characteristics are analyzed.

  18. Properties of Healthcare Teaming Networks as a Function of Network Construction Algorithms

    CERN Document Server

    Zand, Martin S; Farooq, Samir A; Fucile, Christopher; Ghoshal, Grourab; White, Robert J; Quill, Caroline M; Rosenberg, Alexander; Serrano, Hugo; Chafi, Hassan; Boudreau, Timothy

    2016-01-01

    Network models of healthcare systems can be used to examine how providers collaborate, communicate, refer patients to each other. Most healthcare service network models have been constructed from patient claims data, using billing claims to link patients with providers. The data sets can be quite large, making standard methods for network construction computationally challenging and thus requiring the use of alternate construction algorithms. While these alternate methods have seen increasing use in generating healthcare networks, there is little to no literature comparing the differences in the structural properties of the generated networks. To address this issue, we compared the properties of healthcare networks constructed using different algorithms and the 2013 Medicare Part B outpatient claims data. Three different algorithms were compared: binning, sliding frame, and trace-route. Unipartite networks linking either providers or healthcare organizations by shared patients were built using each method. We...

  19. Seeded Bayesian Networks: Constructing genetic networks from microarray data

    Directory of Open Access Journals (Sweden)

    Quackenbush John

    2008-07-01

    Full Text Available Abstract Background DNA microarrays and other genomics-inspired technologies provide large datasets that often include hidden patterns of correlation between genes reflecting the complex processes that underlie cellular metabolism and physiology. The challenge in analyzing large-scale expression data has been to extract biologically meaningful inferences regarding these processes – often represented as networks – in an environment where the datasets are often imperfect and biological noise can obscure the actual signal. Although many techniques have been developed in an attempt to address these issues, to date their ability to extract meaningful and predictive network relationships has been limited. Here we describe a method that draws on prior information about gene-gene interactions to infer biologically relevant pathways from microarray data. Our approach consists of using preliminary networks derived from the literature and/or protein-protein interaction data as seeds for a Bayesian network analysis of microarray results. Results Through a bootstrap analysis of gene expression data derived from a number of leukemia studies, we demonstrate that seeded Bayesian Networks have the ability to identify high-confidence gene-gene interactions which can then be validated by comparison to other sources of pathway data. Conclusion The use of network seeds greatly improves the ability of Bayesian Network analysis to learn gene interaction networks from gene expression data. We demonstrate that the use of seeds derived from the biomedical literature or high-throughput protein-protein interaction data, or the combination, provides improvement over a standard Bayesian Network analysis, allowing networks involving dynamic processes to be deduced from the static snapshots of biological systems that represent the most common source of microarray data. Software implementing these methods has been included in the widely used TM4 microarray analysis package.

  20. How to construct the statistic network? An association network of herbaceous

    Directory of Open Access Journals (Sweden)

    WenJun Zhang

    2012-06-01

    Full Text Available In present study I defined a new type of network, the statistic network. The statistic network is a weighted and non-deterministic network. In the statistic network, a connection value, i.e., connection weight, represents connection strength and connection likelihood between two nodes and its absolute value falls in the interval (0,1]. The connection value is expressed as a statistical measure such as correlation coefficient, association coefficient, or Jaccard coefficient, etc. In addition, all connections of the statistic network can be statistically tested for their validity. A connection is true if the connection value is statistically significant. If all connection values of a node are not statistically significant, it is an isolated node. An isolated node has not any connection to other nodes in the statistic network. Positive and negative connection values denote distinct connectiontypes (positive or negative association or interaction. In the statistic network, two nodes with the greater connection value will show more similar trend in the change of their states. At any time we can obtain a sample network of the statistic network. A sample network is a non-weighted and deterministic network. Thestatistic network, in particular the plant association network that constructed from field sampling, is mostly an information network. Most of the interspecific relationships in plant community are competition and cooperation. Therefore in comparison to animal networks, the methodology of statistic network is moresuitable to construct plant association networks. Some conclusions were drawn from this study: (1 in the plant association network, most connections are weak and positive interactions. The association network constructed from Spearman rank correlation has most connections and isolated taxa are fewer. From net linear correlation,linear correlation, to Spearman rank correlation, the practical number of connections and connectance in the

  1. A new method for constructing networks from binary data

    Science.gov (United States)

    van Borkulo, Claudia D.; Borsboom, Denny; Epskamp, Sacha; Blanken, Tessa F.; Boschloo, Lynn; Schoevers, Robert A.; Waldorp, Lourens J.

    2014-08-01

    Network analysis is entering fields where network structures are unknown, such as psychology and the educational sciences. A crucial step in the application of network models lies in the assessment of network structure. Current methods either have serious drawbacks or are only suitable for Gaussian data. In the present paper, we present a method for assessing network structures from binary data. Although models for binary data are infamous for their computational intractability, we present a computationally efficient model for estimating network structures. The approach, which is based on Ising models as used in physics, combines logistic regression with model selection based on a Goodness-of-Fit measure to identify relevant relationships between variables that define connections in a network. A validation study shows that this method succeeds in revealing the most relevant features of a network for realistic sample sizes. We apply our proposed method to estimate the network of depression and anxiety symptoms from symptom scores of 1108 subjects. Possible extensions of the model are discussed.

  2. Logistics of community smallpox control through contact tracing and ring vaccination: a stochastic network model

    Directory of Open Access Journals (Sweden)

    Portnoy Diane L

    2004-08-01

    Full Text Available Abstract Background Previous smallpox ring vaccination models based on contact tracing over a network suggest that ring vaccination would be effective, but have not explicitly included response logistics and limited numbers of vaccinators. Methods We developed a continuous-time stochastic simulation of smallpox transmission, including network structure, post-exposure vaccination, vaccination of contacts of contacts, limited response capacity, heterogeneity in symptoms and infectiousness, vaccination prior to the discontinuation of routine vaccination, more rapid diagnosis due to public awareness, surveillance of asymptomatic contacts, and isolation of cases. Results We found that even in cases of very rapidly spreading smallpox, ring vaccination (when coupled with surveillance is sufficient in most cases to eliminate smallpox quickly, assuming that 95% of household contacts are traced, 80% of workplace or social contacts are traced, and no casual contacts are traced, and that in most cases the ability to trace 1–5 individuals per day per index case is sufficient. If smallpox is assumed to be transmitted very quickly to contacts, it may at times escape containment by ring vaccination, but could be controlled in these circumstances by mass vaccination. Conclusions Small introductions of smallpox are likely to be easily contained by ring vaccination, provided contact tracing is feasible. Uncertainties in the nature of bioterrorist smallpox (infectiousness, vaccine efficacy support continued planning for ring vaccination as well as mass vaccination. If initiated, ring vaccination should be conducted without delays in vaccination, should include contacts of contacts (whenever there is sufficient capacity and should be accompanied by increased public awareness and surveillance.

  3. Challenges of UK/Irish Contractors regarding Material Management and Logistics in Confined Site Construction

    Directory of Open Access Journals (Sweden)

    Spillane, John P

    2011-12-01

    Full Text Available The aim of this paper is to identify the various managerial issues encountered by UK/Irish contractors in the management of materials in confined urban construction sites. Through extensive literature review, detailed interviews, case studies, cognitive mapping, causal loop diagrams, questionnaire survey and documenting severity indices, a comprehensive insight into the materials management concerns within a confined construction site environment is envisaged and portrayed. The leading issues highlighted are: that contractors’ material spatial requirements exceed available space, it is difficult to coordinate the storage of materials in line with the programme, location of the site entrance makes delivery of materials particularly difficult, it is difficult to store materials on-site due to the lack of space, and difficult to coordinate the storage requirements of the various sub-contractors. With the continued development of confined urban centres and the increasing high cost of materials, any marginal savings made on-site would translate into significant monetary savings at project completion. Such savings would give developers a distinct competitive advantage in this challenging economic climate. As on-site management professionals successfully identify, acknowledge and counteract the numerous issues illustrated, the successful management of materials on a confined urban construction site becomes attainable.

  4. A Location-Inventory-Routing Problem in Forward and Reverse Logistics Network Design

    Directory of Open Access Journals (Sweden)

    Qunli Yuchi

    2016-01-01

    Full Text Available We study a new problem of location-inventory-routing in forward and reverse logistic (LIRP-FRL network design, which simultaneously integrates the location decisions of distribution centers (DCs, the inventory policies of opened DCs, and the vehicle routing decision in serving customers, in which new goods are produced and damaged goods are repaired by a manufacturer and then returned to the market to satisfy customers’ demands as new ones. Our objective is to minimize the total costs of manufacturing and remanufacturing goods, building DCs, shipping goods (new or recovered between the manufacturer and opened DCs, and distributing new or recovered goods to customers and ordering and storage costs of goods. A nonlinear integer programming model is proposed to formulate the LIRP-FRL. A new tabu search (NTS algorithm is developed to achieve near optimal solution of the problem. Numerical experiments on the benchmark instances of a simplified version of the LIRP-FRL, the capacitated location routing problem, and the randomly generated LIRP-FRL instances demonstrate the effectiveness and efficiency of the proposed NTS algorithm in problem resolution.

  5. Current Situations and Developing Tendency of China Post's Logistic Technology

    Institute of Scientific and Technical Information of China (English)

    XU Ru-wei; LI Xue-ping

    2004-01-01

    This paper briefly introduces the construction of China Post's physical network and information network and offers some general ideas about how to develop modern postal logistics. It dwells on the sortation technology, the Chinese Character Recognition Technology and the current situations and tendencies of the Research and Development (R&D) of the Logistic Information Management System.

  6. Reverse logistics network for municipal solid waste management: The inclusion of waste pickers as a Brazilian legal requirement

    Energy Technology Data Exchange (ETDEWEB)

    Ferri, Giovane Lopes, E-mail: giovane.ferri@aluno.ufes.br [Department of Engineering and Technology, Federal University of Espírito Santo – UFES, Rodovia BR 101 Norte, Km 60, Bairro Litorâneo, São Mateus, ES, 29.932-540 (Brazil); Diniz Chaves, Gisele de Lorena, E-mail: gisele.chaves@ufes.br [Department of Engineering and Technology, Federal University of Espírito Santo – UFES, Rodovia BR 101 Norte, Km 60, Bairro Litorâneo, São Mateus, ES, 29.932-540 (Brazil); Ribeiro, Glaydston Mattos, E-mail: glaydston@pet.coppe.ufrj.br [Transportation Engineering Programme, Federal University of Rio de Janeiro – UFRJ, Centro de Tecnologia, Bloco H, Sala 106, Cidade Universitária, Rio de Janeiro, 21949-900 (Brazil)

    2015-06-15

    Highlights: • We propose a reverse logistics network for MSW involving waste pickers. • A generic facility location mathematical model was validated in a Brazilian city. • The results enable to predict the capacity for screening and storage centres (SSC). • We minimise the costs for transporting MSW with screening and storage centres. • The use of SSC can be a potential source of revenue and a better use of MSW. - Abstract: This study proposes a reverse logistics network involved in the management of municipal solid waste (MSW) to solve the challenge of economically managing these wastes considering the recent legal requirements of the Brazilian Waste Management Policy. The feasibility of the allocation of MSW material recovery facilities (MRF) as intermediate points between the generators of these wastes and the options for reuse and disposal was evaluated, as well as the participation of associations and cooperatives of waste pickers. This network was mathematically modelled and validated through a scenario analysis of the municipality of São Mateus, which makes the location model more complete and applicable in practice. The mathematical model allows the determination of the number of facilities required for the reverse logistics network, their location, capacities, and product flows between these facilities. The fixed costs of installation and operation of the proposed MRF were balanced with the reduction of transport costs, allowing the inclusion of waste pickers to the reverse logistics network. The main contribution of this study lies in the proposition of a reverse logistics network for MSW simultaneously involving legal, environmental, economic and social criteria, which is a very complex goal. This study can guide practices in other countries that have realities similar to those in Brazil of accelerated urbanisation without adequate planning for solid waste management, added to the strong presence of waste pickers that, through the

  7. Significance of Trans-European Transport Networks for Logistics Centre Localization as Exemplified by the Łódź Region

    OpenAIRE

    Szymon WIŚNIEWSKI

    2015-01-01

    This work complements and structures knowledge in the field of logistics centres (with focus on the Łódź region). It presents a thorough analysis of strategic documents of the European Union in reference to the functioning of international transport networks. It also provides a detailed description of logistics facilities operations from the theoretical standpoint and definition of relations in points where logistics centres and TEN-T networks overlap. The result of this work is a set of reco...

  8. Construction of Military Logistics Experimentation Teaching Platform%军事物流实验教学平台建设

    Institute of Scientific and Technical Information of China (English)

    魏学将; 张颖

    2016-01-01

    结合军事物流专业人才培养需要,在对军事物流实验教学平台的建设目标和总体框架进行分析的基础上,从基础实验平台、业务实训平台、仿真优化平台和技术创新平台等四个方面对实验教学平台的建设任务进行了详细阐述。%In this paper, in view of the demand in the cultivation of the military logistics professional talents, and on the basis of an analysis of the objective and general framework in the construction of the military logistics experimentation teaching platform, we elaborated on the tasks in the development of such platform from the angels of fundamental experimentation platform, task practical training platform, simulation optimization platform and technical innovation platform.

  9. Design of an integrated forward and reverse logistics network optimi-zation model for commercial goods management

    Directory of Open Access Journals (Sweden)

    Eva Ponce-Cueto

    2015-01-01

    Full Text Available In this study, an optimization model is formulated for designing an integrated forward and reverse logistics network in the consumer goods industry. The resultant model is a mixed-integer linear programming model (MILP. Its purpose is to minimize the total costs of the closed-loop supply chain network. It is important to note that the design of the logistics network may involve a trade-off between the total costs and the optimality in commercial goods management. The model comprises a discrete set as potential locations of unlimited capacity warehouses and fixed locations of customers’ zones. It provides decisions related to the facility location and customers’ requirements satisfaction, all of this related with the inventory and shipment decisions of the supply chain. Finally, an application of this model is illustrated by a real-life case in the food and drinks industry. We can conclude that this model can significantly help companies to make decisions about problems associated with logistics network design.

  10. The spatial prediction of landslide susceptibility applying artificial neural network and logistic regression models: A case study of Inje, Korea

    Science.gov (United States)

    Saro, Lee; Woo, Jeon Seong; Kwan-Young, Oh; Moung-Jin, Lee

    2016-02-01

    The aim of this study is to predict landslide susceptibility caused using the spatial analysis by the application of a statistical methodology based on the GIS. Logistic regression models along with artificial neutral network were applied and validated to analyze landslide susceptibility in Inje, Korea. Landslide occurrence area in the study were identified based on interpretations of optical remote sensing data (Aerial photographs) followed by field surveys. A spatial database considering forest, geophysical, soil and topographic data, was built on the study area using the Geographical Information System (GIS). These factors were analysed using artificial neural network (ANN) and logistic regression models to generate a landslide susceptibility map. The study validates the landslide susceptibility map by comparing them with landslide occurrence areas. The locations of landslide occurrence were divided randomly into a training set (50%) and a test set (50%). A training set analyse the landslide susceptibility map using the artificial network along with logistic regression models, and a test set was retained to validate the prediction map. The validation results revealed that the artificial neural network model (with an accuracy of 80.10%) was better at predicting landslides than the logistic regression model (with an accuracy of 77.05%). Of the weights used in the artificial neural network model, `slope' yielded the highest weight value (1.330), and `aspect' yielded the lowest value (1.000). This research applied two statistical analysis methods in a GIS and compared their results. Based on the findings, we were able to derive a more effective method for analyzing landslide susceptibility.

  11. RESULTS OF INTRODUCTION OF A PROCESS APPROACH TO MANAGEMENT OF SUBJECTS OF SMALL BUSINESS (on an example of logistic service of the construction enterprise

    Directory of Open Access Journals (Sweden)

    E. V. Folomeev

    2013-01-01

    Full Text Available The article is devoted to subjects of small business of construction branch, their place in branch and to problems of management by them. The question of need of introduction of the most effective methods of management by the construction organization, in particular, a process approach is brought up. In article the characteristic of separate elements of this approach is given, methods and ways of their realization at the enterprise from the point of view of allocation and optimization of costs of the enterprise from the logistical point of view are considered and results of its introduction on an example of logistic service of the construction enterprise are given..

  12. On construction of supply chain logistics in tobacco industry%论烟草供应链物流建设

    Institute of Scientific and Technical Information of China (English)

    冰火; 禾木

    2014-01-01

    The necessity and importance of constructing supply chain logistics were readdressed in line with development need of tobacco industry by reviewing growth and advantages of supply chain management. Based on objective analysis of pressing issues, integrated measures towards constructing tobacco supply chain logistics were put forward with right strategic positioning as prerequisite, quality customer service as the core, lean management as focal point, advanced technology as strong support, building internet of things as breakthrough and professional and specialized operation as development direction.%阐述了供应链管理的兴起与优势,根据行业发展需求,重新审视了烟草物流的重要性和建设烟草供应链物流的必然性。按照供应链管理要求,客观分析了烟草物流亟待解决的问题,提出战略定位是供应链物流建设的前提,客户服务是供应链物流的核心,精益管理是供应链物流的重点,先进技术是供应链物流的支撑,物联网建设是供应链物流的突破,专业运作是供应链物流的方向的烟草供应链物流建设路径。

  13. Logistical Support for the Installation of the Plate Boundary Observatory GPS and Borehole Strainmeter Networks

    Science.gov (United States)

    Kurnik, C.; Austin, K.; Coyle, B.; Dittmann, T.; Feaux, K.; Friesen, B.; Johnson, W.; Mencin, D.; Pauk, B.; Walls, C.

    2007-12-01

    The Plate Boundary Observatory (PBO), part of the NSF-funded EarthScope project, is designed to study the three- dimensional strain field resulting from deformation across the active boundary zone between the Pacific and North American plates in the western United States. To meet these goals, UNAVCO will install 880 continuous GPS stations, 103 borehole strainmeter stations, 28 tiltmeters, and five laser strainmeters by October 2008. Such a broad network presents significant logisitical challenges, including moving supplies, equipment, and personnel around 6 million square kilometers, and this requires accurate tracking and careful planning. The PBO logistics chain includes the PBO headquarters at UNAVCO in Boulder, Colorado and five regional offices in the continental United States and Alaska, served by dozens of suppliers spread across the globe. These offices are responsible for building and maintaining sites in their region. Most equipment and supplies first arrive in Boulder, where they are tagged and entered into a UNAVCO-wide equipment database, assembled and quality checked as necessary, and sent on to the appropriate regional office. Larger items which are costly to store and ship from Boulder, such as batteries or long sections of stainless steel pipe and bar required for monuments, are shipped directly from the supplier to each region as needed. These supplies and equipment are also tracked through the ordering, delivery, installation, and maintenance cycle via Earned Value Management techniques which allow us to meet NSF and other Federal procurement rules. Early prototypes and assembly configurations aid the development of material and supply budgets. A thorough understanding of Federal procurement rules at project start up is critical as the project moves forward.

  14. Using Metaheuristic and Fuzzy System for the Optimization of Material Pull in a Push-Pull Flow Logistics Network

    Directory of Open Access Journals (Sweden)

    Afshin Mehrsai

    2013-01-01

    Full Text Available Alternative material flow strategies in logistics networks have crucial influences on the overall performance of the networks. Material flows can follow push, pull, or hybrid systems. To get the advantages of both push and pull flows in networks, the decoupling-point strategy is used as coordination mean. At this point, material pull has to get optimized concerning customer orders against pushed replenishment-rates. To compensate the ambiguity and uncertainty of both dynamic flows, fuzzy set theory can practically be applied. This paper has conceptual and mathematical parts to explain the performance of the push-pull flow strategy in a supply network and to give a novel solution for optimizing the pull side employing Conwip system. Alternative numbers of pallets and their lot-sizes circulating in the assembly system are getting optimized in accordance with a multi-objective problem; employing a hybrid approach out of meta-heuristics (genetic algorithm and simulated annealing and fuzzy system. Two main fuzzy sets as triangular and trapezoidal are applied in this technique for estimating ill-defined waiting times. The configured technique leads to smoother flows between push and pull sides in complex networks. A discrete-event simulation model is developed to analyze this thesis in an exemplary logistics network with dynamics.

  15. Using probabilistic cache scheme to construct the small world network

    Institute of Scientific and Technical Information of China (English)

    ZOU Fu-tai; YI Ping; MA Fan-yuan; LI Jian-hua

    2007-01-01

    Recently some P2P systems have constructed the small world network using the small world model so as to improve the routing performance. In this paper, we propose a novel probabilistic cache scheme to construct the small world network based on the small world model and use it to improve CAN, that is, PCCAN ( Probabilistic Cache - based CAN). PCCAN caches the long contact. It uses the worm routing replacing mechanism and probabilistic replacing strategy on the cache. The probabilistic cache scheme proves to be an efficient approach to model the small world phenomenon. Experiments in both the static and the dynamic network show that PCCAN can converge to the steady state with the cache scheme, and the routing performance is significantly improved with additional low overheads in the network compared with CAN.

  16. Predicting China’s SME Credit Risk in Supply Chain Financing by Logistic Regression, Artificial Neural Network and Hybrid Models

    Directory of Open Access Journals (Sweden)

    You Zhu

    2016-05-01

    Full Text Available Based on logistic regression (LR and artificial neural network (ANN methods, we construct an LR model, an ANN model and three types of a two-stage hybrid model. The two-stage hybrid model is integrated by the LR and ANN approaches. We predict the credit risk of China’s small and medium-sized enterprises (SMEs for financial institutions (FIs in the supply chain financing (SCF by applying the above models. In the empirical analysis, the quarterly financial and non-financial data of 77 listed SMEs and 11 listed core enterprises (CEs in the period of 2012–2013 are chosen as the samples. The empirical results show that: (i the “negative signal” prediction accuracy ratio of the ANN model is better than that of LR model; (ii the two-stage hybrid model type I has a better performance of predicting “positive signals” than that of the ANN model; (iii the two-stage hybrid model type II has a stronger ability both in aspects of predicting “positive signals” and “negative signals” than that of the two-stage hybrid model type I; and (iv “negative signal” predictive power of the two-stage hybrid model type III is stronger than that of the two-stage hybrid model type II. In summary, the two-stage hybrid model III has the best classification capability to forecast SMEs credit risk in SCF, which can be a useful prediction tool for China’s FIs.

  17. The Construction of Corporate Social Responsibility in Network Societies

    DEFF Research Database (Denmark)

    Schultz, Friederike; Castello, Itziar; Morsing, Mette

    2013-01-01

    The paper introduces the communication view on Corporate Social Responsibility (CSR), which regards CSR as communicatively constructed in dynamic interaction processes in today's networked societies. Building on the idea that communication constitutes organizations we discuss the potentially......-normative view on CSR, which highlights the societal conditions and role of corporations in creating norms. We argue that both the established views, by not sufficiently acknowledging communication dynamics in networked societies, remain biased in three ways: control-biased, consistency-biased, and consensus...

  18. A multi-echelon reverse logistics network design for product recovery-a case of truck tire remanufacturing

    DEFF Research Database (Denmark)

    Sasikumar, P.; Kannan, Govindan; Haq, A. Noorul

    2010-01-01

    called retreading) from the used tire is proposed in this work. The implementation of such remanufacturing system usually requires an appropriate reverse logistics network for choosing the physical locations, facilities, and transportation links to convey the used products from customers...... to the remanufacturing facility and from there to secondary markets. The main objective of this work is to develop a mixed integer nonlinear programming model for maximizing the profit of a multi-echelon reverse logistics network and also to present a real-life case study of truck tire remanufacturing for the secondary...... is a profitable one by the way of cost reduction. Sensitivity analysis of the model is also presented to find the maximum allowable distance between the customers and initial collection points....

  19. Improving the Input of Classified Neural Networks Through Feature Construction

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A general classification algorithm of neural networks is unable to obtain satisfied results because of the uncertain problems existing among the features in most classification programs, such as interaction. With new features constructed by optimizing decision trees of examples, the input of neural networks is improved and an optimized classification algorithm based on neural networks is presented. A concept of dispersion of a classification program is also introduced too in this paper. At the end of the paper, an analysis is made with an example.``

  20. Construction of ontology augmented networks for protein complex prediction.

    Science.gov (United States)

    Zhang, Yijia; Lin, Hongfei; Yang, Zhihao; Wang, Jian

    2013-01-01

    Protein complexes are of great importance in understanding the principles of cellular organization and function. The increase in available protein-protein interaction data, gene ontology and other resources make it possible to develop computational methods for protein complex prediction. Most existing methods focus mainly on the topological structure of protein-protein interaction networks, and largely ignore the gene ontology annotation information. In this article, we constructed ontology augmented networks with protein-protein interaction data and gene ontology, which effectively unified the topological structure of protein-protein interaction networks and the similarity of gene ontology annotations into unified distance measures. After constructing ontology augmented networks, a novel method (clustering based on ontology augmented networks) was proposed to predict protein complexes, which was capable of taking into account the topological structure of the protein-protein interaction network, as well as the similarity of gene ontology annotations. Our method was applied to two different yeast protein-protein interaction datasets and predicted many well-known complexes. The experimental results showed that (i) ontology augmented networks and the unified distance measure can effectively combine the structure closeness and gene ontology annotation similarity; (ii) our method is valuable in predicting protein complexes and has higher F1 and accuracy compared to other competing methods.

  1. Constructing low-dimensional molecular networks on metal surfaces

    NARCIS (Netherlands)

    Pham, Tuan Anh

    2016-01-01

    The construction of one- as well as two-dimensional molecular networks confined to surfaces is nowadays considered as a promising alternative to the conventional top-down approach for the design and development of future electronic devices. In the framework of this doctoral thesis, various low-dimen

  2. A Constructive Neural-Network Approach to Modeling Psychological Development

    Science.gov (United States)

    Shultz, Thomas R.

    2012-01-01

    This article reviews a particular computational modeling approach to the study of psychological development--that of constructive neural networks. This approach is applied to a variety of developmental domains and issues, including Piagetian tasks, shift learning, language acquisition, number comparison, habituation of visual attention, concept…

  3. A Constructive Neural-Network Approach to Modeling Psychological Development

    Science.gov (United States)

    Shultz, Thomas R.

    2012-01-01

    This article reviews a particular computational modeling approach to the study of psychological development--that of constructive neural networks. This approach is applied to a variety of developmental domains and issues, including Piagetian tasks, shift learning, language acquisition, number comparison, habituation of visual attention, concept…

  4. Algorithms for Constructing Overlay Networks For Live Streaming

    CERN Document Server

    Andreev, Konstantin; Meyerson, Adam; Saks, Jevan; Sitaraman, Ramesh K

    2011-01-01

    We present a polynomial time approximation algorithm for constructing an overlay multicast network for streaming live media events over the Internet. The class of overlay networks constructed by our algorithm include networks used by Akamai Technologies to deliver live media events to a global audience with high fidelity. We construct networks consisting of three stages of nodes. The nodes in the first stage are the entry points that act as sources for the live streams. Each source forwards each of its streams to one or more nodes in the second stage that are called reflectors. A reflector can split an incoming stream into multiple identical outgoing streams, which are then sent on to nodes in the third and final stage that act as sinks and are located in edge networks near end-users. As the packets in a stream travel from one stage to the next, some of them may be lost. A sink combines the packets from multiple instances of the same stream (by reordering packets and discarding duplicates) to form a single in...

  5. 物流管理专业群建设%On the Construction of Logistics Management Professional Groups

    Institute of Scientific and Technical Information of China (English)

    李东; 金廷芳

    2012-01-01

    The comprehensive implementation of the training model of "three phase in one major,each have different focuses" in Logistics Management professional group has proved effective in continuous improvement of the quality of personnel training;"position-related certificate and competency based" curriculum system of professional job has been basically established;"working-process-oriented and project-based"curriculum reform began to take effect;the software and hardware of in-school practical training center with real-life situations and projects is gradually built;students can adapt to the new working environment in a short time;the "win-win scenario for school and enterprise" has achieved with the successful launch of on-site practical training base inside enterprises;a team of "highly qualified,highly educated teachers with senior professional titles and international vision" have outstanding teaching ability and extensive research achievement;construction has centered on every aspects of logistics industry and enhanced the social services capacity of logistics significantly.%物流管理专业群全面践行"一分三、各侧重"的人才培养模式,人才培养质量不断提高;"岗证对接、能力本位",以职业岗位能力为标杆的课程体系基本建立;"以工作过程为导向,以项目为载体"的课程改革初见成效;"真情境、实项目、软硬并进"的校内实训中心逐步建成,学生就业适应期短;"校企共赢"的校外实习基地,成效显著;"三高一先"的专业师资队伍,教学能力强、科研成果丰富;全方位对接物流产业,引领行业发展的社会服务能力显著增强。

  6. 基于云计算技术的物流信息平台建设%Construction of Logistics Information Platform Based on Cloud Computing Technology

    Institute of Scientific and Technical Information of China (English)

    黄华

    2016-01-01

    Cloud computing technologies play a key role in the construction of logistics information platform, is the combination of the Internet technology and the construction of logistics, has an important role in the development of logistics industry now. The article mainly analyzes the construction of logistics information platform based on cloud computing technology, designed to provide certain reference to promote the construction of logistics information technology.%云计算技术运用在物流信息平台建设中发挥核心作用,是互联网技术与物流建设相结合的产物,在现在物流行业发展中占据重要地位。文章主要分析云计算技术基础上的物流信息平台建设,旨在为促进物流信息技术建设提供一定借鉴。

  7. Wireless Sensor Networks for Resources Tracking at Building Construction Sites

    Institute of Scientific and Technical Information of China (English)

    SHEN Xuesong; CHEN Wu; LU Ming

    2008-01-01

    We evaluate the technical feasibility of applying emerging wireless network technologies for re-sources tracking at building construction sites.We first identify practical constraints in solving resource-tracking problems in an enclosed or partially covered environment.We then compare pros and cons of available localization principles and examine the latest wireless communication technologies,including Wi-Fi,Bluetooth,Ultra-Wideband(UWB)and ZigBee.We find that the ZigBee-based wireless sensor network and the received signal strength indicator(RSSI)localization method are most promising to tackle on-site tracking of construction resources.Finally,we anticipate some application challenges associated with deploying wireless sensor networks for resources tracking in the practical context.

  8. Study on Reverse Logistics Network Planning Model of Electronic Product%电子产品逆向物流网络规划模型研究

    Institute of Scientific and Technical Information of China (English)

    贾红雨; 王会娟

    2012-01-01

    在分析和比较各类回收网络特点的基础上,提出了一种适合中国电子废弃物回收物流管理和分析的正逆向集成回收网络结构,该结构较现有其他研究将维修/退货产品及二手市场收益作为考虑要素,在此基础上考虑到电子废弃物回收过程的不确定性,建立了基于混合整数线性规划(MILP)方法的以网络建设和运营费用最小为目标函数的物流网络模型,并采用案例数据对模型的适用性加以验证。%On the basis of analyzing and comparing the differ- ent characteristics of reeyeling networks, put forward a combi-nation of the forward and reverse recovery network structure which suitable for China's electronic waste recycling logistics management and analysis, compared with other existing struc- ture, this structure took repair/return products and second- hand market gains as consider elements. Based on this, in consideration of the uncertainty of electronic waste recycling process, built a logistics network model which based on mixed integer linear programming (MILP) method, took the minimum cost of network construction and operation as objective func- tion, and by using case data to validate the applicability of the model.

  9. Research of Construction and Development of Military Logistics Bases%综合性军事物流基地建设发展研究

    Institute of Scientific and Technical Information of China (English)

    戴强; 王维俊; 毛龙波

    2012-01-01

    In this paper, we discussed in—depth the line of thinking in the construction and development of military logistics bases, analyzed its precise positioning and specific orientation and introduced the principles in the construction of comprehensive military logistics bases.%深入探讨了我国军事物流基地建设发展思路,分析了我军物流基地建设发展的精准定位和具体定向,并介绍了综合性军事物流基地的建设原则.

  10. Research on the Implementation of Logistics Financial Business in the Network Logistics Enterprises%网络型物流企业实施物流金融业务的探究

    Institute of Scientific and Technical Information of China (English)

    孙珊珊; 刘宏伟; 汪传雷

    2015-01-01

    This article from the basic characteristics of networked logistics enterprise and logistics finance,analysis of the current third -party logistics enterprises to implement the logistics financial business faced assessment of corporate finance qualification and the problem of inadequate supervision,creative proposed by networked logistics enterprise carrying out logistics finance business.A lot of small and medium enterprises in China are facing cash flow problems,logistics finance has “more for less”situation,the network of logistics enterprises to implement the logistics financial services to credit and according to the customer demand choice supervision mode,to meet the financing needs of customers on the basis of promoting customer demand for production and sales.%文中从网络型物流企业和物流金融的基本特征出发,分析当前第三方物流企业实施物流金融业务时面临的评估融资企业资质及监管不力的问题,创造性的提出由网络型物流企业实施物流金融业务。我国的很多中小企业面临现金流的问题,物流金融业存在“需多供少”的现状,文中网络型物流企业实施物流金融业务的再授信和根据客户需求选择监管地的模式,能够在满足客户融资需求的基础上促进客户的生产和销售需求。

  11. A Study on the Composition of Construction Logistics Costs%建设工程项目物流成本分析

    Institute of Scientific and Technical Information of China (English)

    方媛; 吴兆堂

    2012-01-01

    以预制构件为对象,综合分析了工程物料从生产工厂制造至按设计图纸吊装到建筑物指定位置过程的各个物流环节涉及的各项活动,基于此过程建立了工程项目物流模型,并使用基于作业活动的成本分析法研究工程项目物流成本构成。研究结果将有助于工程项目参与各方更全面、详细地了解工程物流过程及相关成本构成,进而达到对工程项目总成本的有效控制。%With the advancement of construction technologies and materials, more and more processes are conducted off site. The advantages of using prefabricated components are widely documented, which include a lower project cost ,better quality control ,faster assembly on site, and lesser waste. However, extensive use of off-site fabrication demands for a higher management control on the logistics process. Failing to do so may result in multi-handling and delays which could compound the time and cost pressure of a construction project. In this paper, the construction logistics process which captures the movement of precast concrete components from the prefabrication yard to the construction site is introduced. The respective logistics costs are identified based on the activity-based costing approach. This paper should help managers and planners to increase their understanding on construction logistics activities and their corresponding costs so as to increase their bid competitiveness and improve the chance of success at the construction stage by minirnising the construction logistics costs.

  12. Integrated disaster relief logistics: a stepping stone towards viable civil-military networks?

    Science.gov (United States)

    Tatham, Peter; Rietjens, Sebastiaan Bas

    2016-01-01

    The twenty-first century has seen a significant rise in all forms of disasters and this has resulted in military and humanitarian organisations becoming more frequently engaged in the provision of support to those affected. Achieving an efficient and effective logistic preparation and response is one of the key elements in mitigating the impact of such events, but the establishment of mechanisms to deliver an appropriately integrated civil-military approach remains elusive. Not least because of the high percentage of assistance budgets spent on logistics, this area is considered to represent fertile ground for developing improved processes and understanding. In practice, the demands placed on civilian and military logisticians are broadly similar, as is the solution space. Speaking a common language and using common concepts, it is argued, therefore, that the logistic profession should be in the vanguard of the development of an improved civil-military interface.

  13. Constructing Battery-Aware Virtual Backbones in Wireless Sensor Networks

    Directory of Open Access Journals (Sweden)

    Chi Ma

    2007-05-01

    Full Text Available A critical issue in battery-powered sensor networks is to construct energy efficient virtual backbones for network routing. Recent study in battery technology reveals that batteries tend to discharge more power than needed and reimburse the over-discharged power if they are recovered. In this paper we first provide a mathematical battery model suitable for implementation in sensor networks. We then introduce the concept of battery-aware connected dominating set (BACDS and show that in general the minimum BACDS (MBACDS can achieve longer lifetime than the previous backbone structures. Then we show that finding a MBACDS is NP-hard and give a distributed approximation algorithm to construct the BACDS. The resulting BACDS constructed by our algorithm is at most (8+Δopt size, where Δ is the maximum node degree and opt is the size of an optimal BACDS. Simulation results show that the BACDS can save a significant amount of energy and achieve up to 30% longer network lifetime than previous schemes.

  14. Constructing Battery-Aware Virtual Backbones in Wireless Sensor Networks

    Directory of Open Access Journals (Sweden)

    Yang Yuanyuan

    2007-01-01

    Full Text Available A critical issue in battery-powered sensor networks is to construct energy efficient virtual backbones for network routing. Recent study in battery technology reveals that batteries tend to discharge more power than needed and reimburse the over-discharged power if they are recovered. In this paper we first provide a mathematical battery model suitable for implementation in sensor networks. We then introduce the concept of battery-aware connected dominating set (BACDS and show that in general the minimum BACDS (MBACDS can achieve longer lifetime than the previous backbone structures. Then we show that finding a MBACDS is NP-hard and give a distributed approximation algorithm to construct the BACDS. The resulting BACDS constructed by our algorithm is at most opt size, where is the maximum node degree and opt is the size of an optimal BACDS. Simulation results show that the BACDS can save a significant amount of energy and achieve up to longer network lifetime than previous schemes.

  15. Workload-Aware Tree Construction Algorithm for Wireless Sensor Networks

    Directory of Open Access Journals (Sweden)

    Kayiram Kavitha

    2012-04-01

    Full Text Available Wireless Sensor Networks play a vital role in applications like disaster management and human relief, habitat monitoring, studying the weather and eco systems, etc. Since the location of deployment of these WSNs is usually remote, the source of energy is restricted to battery. A Significant amount of work has been done by researchers in the past to achieve energy efficiency in WSNs. In this paper we propose a scheme to optimize the power utilization in a WSN. Many of the WSN applications form a tree topology for communication. In a WSN, that adopts tree topology, it is observed that the nodes at higher levels of the tree tend to consume more power when compared to those at lowerlevels. In our proposed workload-aware query/result routing tree construction scheme, we construct thefinal routing tree by keeping in mind the workload of nodes at various levels of the tree. This way, the tree construction takes place with workload at each level being evenly distributed among the nodes at that level. The proposed approach not only increases the lifetime of the network, but also utilizes the battery power optimally. Simulation results show a considerable increase in the lifetime, and effectiveness of the wireless senor network, as a result of applying our proposed tree construction technique.

  16. 事业单位后勤部门职工队伍建设思路漫谈%Idea for Public Institution Logistics Department Staff Team Construction

    Institute of Scientific and Technical Information of China (English)

    张娜

    2014-01-01

    在建设和谐社会的过程当中,事业单位的后勤部门是一支非常重要的队伍。重视和加强事业单位后勤部门的职工队伍建设,将能够让后勤部门做好相关工作和提高后勤部门的服务质量,使事业单位健康发展。%In the process of building a harmonious society, the logistics department of public institutions is a very important team. To attach great importance to and strengthen the institutions logistics department staff team construction will be able to let the logistics department to do related work and improve the service quality of logistics department, leading to the healthy development of public institutions.

  17. Construction Of Lean Logistics Management System in Tobacco Industry%论烟草行业精益物流管理体系建设

    Institute of Scientific and Technical Information of China (English)

    邱莹; 张丹羽; 谢继超

    2011-01-01

    The paper first introduces in detail the construction of lean logistics management system in tobacco industry, analyzes the concept of lean logistics as well as the main content and conditions of implementation of tobacco industry lean logistics sysem and finally formulates a model for the lean logistics managementy of tobacco industry that is multi-layered, multi-modular and continuously and circularly improving.%就烟草行业“精益物流”管理体系建设进行了较详尽的阐述,分析了精益物流的含义、烟草行业精益物流建设的主要内容、实施条件,并最终建立多层次、多模块、不断循环上升的烟草行业精益物流管理体系模型.

  18. 我国循环经济下绿色物流体系的构建%Construction of Green Logistics System under China's Circular Economy

    Institute of Scientific and Technical Information of China (English)

    陈晓玥

    2012-01-01

    阐述绿色物流与循环经济的关系,通过理论与实证分析,指出物流虽然对经济发展做出了巨大贡献,但伴随着运输、仓储、配送、包装、装卸搬运、流通加工等物流功能的实现,也产生了许多环境问题。提出构建绿色物流体系的几条路径:企业物流绿色化;发展第三方物流,建立城市物流分层配送系统;构建供应链绿色物流系统以及通过政策引导,树立绿色物流理念。%This paper illustrates the relationship between green logistics and circular economy. Based on theory and practice, the logistics functions of transportation, storage, distribution, packaging, handling, and processing cause many environmental problems though they contribute greatly to the economic growth. To build the green logistics system, this essay puts forward four approaches including construction of the green enterprise's logistics system, development of Third Party Logistics and stratified logistics service in cities, establishment of green supply chain of logisitics system, and fostering a public awareness of green logistics through government policies.

  19. 城市公共物流信息平台功能与结构设计%Study on Construction of City Public Logistics Information Platform

    Institute of Scientific and Technical Information of China (English)

    卢志滨; 叶蔓

    2012-01-01

    City public logistics information platform is the core and key factor of the development of modern logistics. Through the construction of logistics information platform, it can greatly promote the information-oriented for modem logistics development. The concept and characteristic of logistics information platform are defined and the role and significance of city logistics information platform have been analyzed. Based on the analysis of city logistics information platform system function and stnacture, the overall framework of the hierarchy software and hardware for information platform have been built and designed.%城市公共物流信息平台的建设是发展现代物流的核心和关键,通过建设物流信息平台可以极大地推动现代物流向信息化方向发展。通过对城市公共物流信息平台的概念、特征、作用和意义等分析.探讨了城市公共物流信息平台的系统功能与结构,在此基础上设计了信息平台的总体框架、层次结构及软硬件。

  20. Developing a decision-making framework for levels of logistics outsourcing in food supply chain networks

    NARCIS (Netherlands)

    Hsiao, L.; Vorst, van der J.G.A.J.; Kemp, R.G.M.; Omta, S.W.F.

    2010-01-01

    Purpose – The purpose of this paper is to present a decision-making framework for outsourcing levels of logistics activities. These are: execution level of basic activities (such as transportation, warehousing); value-added activities; planning and control level of activities (such as transportation

  1. A Comparison of Logistic Regression, Neural Networks, and Classification Trees Predicting Success of Actuarial Students

    Science.gov (United States)

    Schumacher, Phyllis; Olinsky, Alan; Quinn, John; Smith, Richard

    2010-01-01

    The authors extended previous research by 2 of the authors who conducted a study designed to predict the successful completion of students enrolled in an actuarial program. They used logistic regression to determine the probability of an actuarial student graduating in the major or dropping out. They compared the results of this study with those…

  2. A Comparison of Logistic Regression, Neural Networks, and Classification Trees Predicting Success of Actuarial Students

    Science.gov (United States)

    Schumacher, Phyllis; Olinsky, Alan; Quinn, John; Smith, Richard

    2010-01-01

    The authors extended previous research by 2 of the authors who conducted a study designed to predict the successful completion of students enrolled in an actuarial program. They used logistic regression to determine the probability of an actuarial student graduating in the major or dropping out. They compared the results of this study with those…

  3. Research on the Construction of Emergency Logistics Supply Chain%应急物流供应链构建研究

    Institute of Scientific and Technical Information of China (English)

    刘玲丽

    2014-01-01

    文中在阐释应急物流及其供应链概念的基础上,分析了应急物流供应链的特点及流程,构建了应急物流供应链结构模型,探讨了应急物流供应链的构建原则、参与主体构成、协同机制的建立及信息平台的构建等相关问题。%Base on the definition of emergency logistics supply chain ,this paper analyses it's characteristic and flow.The paper also structures a model of emergency logistics supply chain and discusses the relevant questions about the emergency logistics supply chain construction principles ,it's main participants ,coordination mechanism ,information platform construction and so on.

  4. A DATA MINING METHOD BASED ON CONSTRUCTIVE NEURAL NETWORKS

    Institute of Scientific and Technical Information of China (English)

    Wang Lunwen; Zhang Ling

    2007-01-01

    In this letter, Constructive Neural Networks (CNN) is used in large-scale data mining. By introducing the principle and characteristics of CNN and pointing out its deficiencies, fuzzy theory is adopted to improve the covering algorithms. The threshold of covering algorithms is redefined. "Extended area" for test samples is built. The inference of the outlier is eliminated. Furthermore, "Sphere Neighborhood (SN)" are constructed. The membership functions of test samples are given and all of the test samples are determined accordingly. The method is used to mine large wireless monitor data (about 3 × 107 data points), and knowledge is found effectively.

  5. Construction of Network Management Information System of Agricultural Products Supply Chain Based on 3PLs

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The necessity to construct the network management information system of 3PLs agricultural supply chain is analyzed,showing that 3PLs can improve the overall competitive advantage of agricultural supply chain.3PLs changes the homogeneity management into specialized management of logistics service and achieves the alliance of the subjects at different nodes of agricultural products supply chain.Network management information system structure of agricultural products supply chain based on 3PLs is constructed,including the four layers (the network communication layer,the hardware and software environment layer,the database layer,and the application layer) and 7 function modules (centralized control,transportation process management,material and vehicle scheduling,customer relationship,storage management,customer inquiry,and financial management).Framework for the network management information system of agricultural products supply chain based on 3PLs is put forward.The management of 3PLs mainly includes purchasing management,supplier relationship management,planning management,customer relationship management,storage management and distribution management.Thus,a management system of internal and external integrated agricultural enterprises is obtained.The network management information system of agricultural products supply chain based on 3PLs has realized the effective sharing of enterprise information of agricultural products supply chain at different nodes,establishing a long-term partnership revolving around the 3PLs core enterprise,as well as a supply chain with stable relationship based on the supply chain network system,so as to improve the circulation efficiency of agricultural products,and to explore the sales market for agricultural products.

  6. Research on Collaborative Innovative in Logistics Services Industry Based on Network Governance%基于网络治理的物流服务业协同创新研究

    Institute of Scientific and Technical Information of China (English)

    薛传利

    2016-01-01

    随着科技和信息技术的发展,物流服务业作为一种新兴的现代服务业不断发挥着自己应有的魔力和魅力,激励和引领着物流企业的升级和改造。而目前低端的不成体系的物流服务业,已经不能适应社会化大生产下物流企业日益激烈的竞争。物流服务业的协同创新,对提高物流企业的核心竞争力,优化物流资源配置显得急切和必要。本文基于网络治理的相关理论研究,分析了物流服务业协同创新的相关理论,构建了基于网络治理的物流服务业协同创新概念模型,并以该模型为基础总结出物流服务业提高创新绩效的具体路径,以此来优化整个物流行业的运营环境和经营业绩。%With the development of science and technology and information technology, logistics industry as an emerging modern service industry should continue to play their own magical and attractive role in logistics services industry, inspire and lead the logistics enterprises to upgrade and transformation. However the current low-end logistics service fragmentation, it has been unable to meet the next large-scale socialized production logistics enterprises’ increasingly fierce competition. Collaborative innovation of logistics services, it can enhance the core competitiveness of logistics enterprises, optimize logistics resources seem urgent and necessary. In this paper, the theory of network governance for analyzing the logistics industry collaborative innovation theory is constructed based on the logistics industry collaborative innovation network conceptual model of governance, and summed up the model-based logistics services to improve the innovation performance of concrete path, in order to optimize the entire logistics industry operating environment and business performance.

  7. 我国物流园区建设前期程序初探%A Study on the Preliminary Procedures of Logistics Park Construction

    Institute of Scientific and Technical Information of China (English)

    邢虎松

    2015-01-01

    This paper systematically summarizes the preliminary procedures of logistics park planning and construction ,and the purposes and effects of each preliminary procedure .By learning from German experi-ence in the construction of logistics parks ,this study points out the problems in the preliminary procedures of logistics park planning and construction .For example ,the project operators neglect the planning in con-struction projects ;the government ignores the overall planning of the urban logistics and lacks the regulato-ry planning of the project land .T herefore ,the paper raises general ideas to improve the preliminary proce-dures of logistics park planning and construction ,and brings out reasonable proposals in which the govern-ment should play the leading role in planning .T he research also contends that the project operators should improve the planning and test the feasibility of the logistics park construction ,and that the government should strengthen the supervision in the construction processes of specific logistics project .%系统梳理我国目前物流园区建设的前期规划程序步骤以及各个程序的目的和作用,借鉴德国物流园区规划建设的经验,可知目前我国物流园区的规划建设前期程序中存在项目建设主体“重建设、轻规划”、政府“一事一议、缺少总体谋划”和项目用地缺少控制性详细规划的问题。由此,政府应完善物流园区规划建设前期程序的总体思路,并根据总体思路提出物流园区发展中的规划主导,促进园区项目建设主体对总归、可研的重视程度,加强对具体物流项目建设的过程监管。

  8. Construction of the NIFS campus information network, NIFS-LAN

    Energy Technology Data Exchange (ETDEWEB)

    Tsuda, Kenzo; Yamamoto, Takashi; Kato, Takeo; Nakamura, Osamu; Watanabe, Kunihiko; Watanabe, Reiko; Tsugawa, Kazuko; Kamimura, Tetsuo

    2000-10-01

    The advanced NIFS campus information network, NIFS-LAN, was designed and constructed as an informational infrastructure in 1996, 1997 and 1998 fiscal year. NIFS-LAN was composed of three autonomous clusters classified from research purpose; Research Information cluster, Large Helical Device Experiment cluster and Large-Scale Computer Simulation Research cluster. Many ATM(Asychronous Transfer Mode) switching systems and switching equipments were used for NIFS-LAN. Here, the outline of NIFS-LAN is described. (author)

  9. Signalling network construction for modelling plant defence response.

    Directory of Open Access Journals (Sweden)

    Dragana Miljkovic

    Full Text Available Plant defence signalling response against various pathogens, including viruses, is a complex phenomenon. In resistant interaction a plant cell perceives the pathogen signal, transduces it within the cell and performs a reprogramming of the cell metabolism leading to the pathogen replication arrest. This work focuses on signalling pathways crucial for the plant defence response, i.e., the salicylic acid, jasmonic acid and ethylene signal transduction pathways, in the Arabidopsis thaliana model plant. The initial signalling network topology was constructed manually by defining the representation formalism, encoding the information from public databases and literature, and composing a pathway diagram. The manually constructed network structure consists of 175 components and 387 reactions. In order to complement the network topology with possibly missing relations, a new approach to automated information extraction from biological literature was developed. This approach, named Bio3graph, allows for automated extraction of biological relations from the literature, resulting in a set of (component1, reaction, component2 triplets and composing a graph structure which can be visualised, compared to the manually constructed topology and examined by the experts. Using a plant defence response vocabulary of components and reaction types, Bio3graph was applied to a set of 9,586 relevant full text articles, resulting in 137 newly detected reactions between the components. Finally, the manually constructed topology and the new reactions were merged to form a network structure consisting of 175 components and 524 reactions. The resulting pathway diagram of plant defence signalling represents a valuable source for further computational modelling and interpretation of omics data. The developed Bio3graph approach, implemented as an executable language processing and graph visualisation workflow, is publically available at http://ropot.ijs.si/bio3graph/and can be

  10. Spam Source Clustering by Constructing Spammer Network with Correlation Measure

    Science.gov (United States)

    Shin, Jeongkyu; Kim, Seunghwan

    Spam filtering is one of the most challenging problems in electric message systems. In general, recent studies on specifying real spam source are based on content filtering because spammers usually falsify their origin. We propose a method to specify spam source based on structural analysis with complex network. We assume that each spam sources either has the same victim list or uses the same spam-hosting program. We treat spam source - target relationship as a bipartite network and construct weighted spam source network by network projection using correlation measure. We find that community clustering methods are inappropriate with spammer network. We group spammers with gradient-based grouping, which uses correlations between nodes as gradient between nodes. We convert them into local minima, which helps to cluster spammers into a few spam source groups. We investigate the weblog spam data with the proposed method and validate it. The method that we propose can be applied to diverse categorization problems, such as multiple text categorization and network subunit clustering.

  11. An Agent-Based Manufacturing Management System for Production and Logistics within Cross-Company Regional and National Production Networks

    Directory of Open Access Journals (Sweden)

    S. Heinrich

    2005-03-01

    Full Text Available The goal is the development of a simultaneous, dynamic, technological as well as logistical real-time planning and an organizational control of the production by the production units themselves, working in the production network under the use of Multi-Agent-Technology. The design of the multi-agent-based manufacturing management system, the models of the single agents, algorithms for the agent-based, decentralized dispatching of orders, strategies and data management concepts as well as their integration into the SCM, basing on the solution described, will be explained in the following.

  12. An Agent-based Manufacturing Management System for Production and Logistics within Cross-Company Regional and National Production Networks

    Directory of Open Access Journals (Sweden)

    T. Hanel

    2008-11-01

    Full Text Available The goal is the development of a simultaneous, dynamic, technological as well as logistical real-time planning and an organizational control of the production by the production units themselves, working in the production network under the use of Multi-Agent-Technology. The design of the multi-agent-based manufacturing management system, the models of the single agents, algorithms for the agent-based, decentralized dispatching of orders, strategies and data management concepts as well as their integration into the SCM, basing on the solution described, will be explained in the following.

  13. Construction of a multimedia application on public network

    Science.gov (United States)

    Liu, Jang; Wang, Chwan-Huei; Tseng, Ming-Yu; Hsiao, Sun-Lang; Luo, Wen-Hen; Tseng, Yung-Mean; Hung, Feng-Yue

    1994-04-01

    This paper describes our perception of current developments in networking, telecommunication and technology of multimedia. As such, we have taken a constructive view. From this standpoint, we devised a client server architecture that veils servers from their customers. It adheres to our conviction that network and location independence for serve access is a future trend. We have constructed an on-line KARAOKE on an existing CVS (Chinese Videotex System) to test the workability of this architecture and it works well. We are working on a prototype multimedia service network which is a miniature client server structure of our proposal. A specially designed protocol is described. Through this protocol, an one-to-many connection can be set up and to provide for multimedia applications, new connections can be established within a basic connection. So continuous media may have their own connections without being interrupted by other media, at least from the view of an application. We have advanced a constructive view which is not a framework itself. But it is tantamount to a framework, in building systems as assembly of methods, technics, designs, and ideas. This is what a framework does with more flexibility and availability.

  14. Fuzzy Naive Bayesian for constructing regulated network with weights.

    Science.gov (United States)

    Zhou, Xi Y; Tian, Xue W; Lim, Joon S

    2015-01-01

    In the data mining field, classification is a very crucial technology, and the Bayesian classifier has been one of the hotspots in classification research area. However, assumptions of Naive Bayesian and Tree Augmented Naive Bayesian (TAN) are unfair to attribute relations. Therefore, this paper proposes a new algorithm named Fuzzy Naive Bayesian (FNB) using neural network with weighted membership function (NEWFM) to extract regulated relations and weights. Then, we can use regulated relations and weights to construct a regulated network. Finally, we will classify the heart and Haberman datasets by the FNB network to compare with experiments of Naive Bayesian and TAN. The experiment results show that the FNB has a higher classification rate than Naive Bayesian and TAN.

  15. Research on the Construction of Food Industrial Correlation Network Model

    Directory of Open Access Journals (Sweden)

    Yu Zhenlei

    2015-05-01

    Full Text Available As the objective existence of economy, the relational and spatial structure of Industrial correlation not only determines the quality and level of economic growth, but is regarded as the important source of gaining competitive advantages. Based on the input-output model and network model of food industry, this study focuses on the method and application of the construction of food industrial correlation network model. Analyzing the connotation of food industrial correlation, the article finds the way to describe it with graphs. What’s more, these graphs and network theory are used to design the index coefficient of industrial correlation to show the food industrial correlation and its structure feature.

  16. 煤炭物流网络风险分析与应对研究%Research On Risk Analysis and Risk Coping of Coal Logistics Network System

    Institute of Scientific and Technical Information of China (English)

    吉迎东

    2012-01-01

      The coal logistics network is a new form of organization of the coal industry, based on a comprehensive risk management theory and methods, combined with China's coal logistics network characteristics, the paper analyze and describe its basic operation mode, identify demand uncertainty risk of coal logistics network, risk of price fluctuations, the risk of network interruption and congestion, the risk of competition in the industry, network complexity and transmission risk, the risk of the logistics network integrity and dynamic. In order to prevent risk of coal logistics network, put forward to accelerate network integration and optimization, information sharing platform to promote the network alliance-building, the establishment of the evaluation of network partners as the risk response strategies of coal logistics network and optimization system.%  煤炭物流网络是煤炭产业的一种新型组织形式,文中基于全面风险管理理论与方法,结合中国煤炭物流网络特征,分析和描述了其基本运行模式,并对煤炭物流网络的需求不确定性风险、价格波动风险、网络中断和拥塞风险、行业竞争风险、网络复杂性与传递性风险、物流网络整体性与动态性风险进行了辨识,提出了加快网络整合优化、建立信息共享平台、推动网络联盟建设、建立网络合作伙伴评价与优选体系作为煤炭物流网络的风险应对策略。

  17. An Efficient Construction of Secure Network Co ding

    Institute of Scientific and Technical Information of China (English)

    ZHANG Jing-li; TANG Ping; MA Song-ya

    2016-01-01

    Under the assumption that the wiretapper can get at most r(rnetwork code with transmitting rate n−r by a properly chosen matrix Q−1. They also gave the construction for searching such an n × n nonsingular matrix Q. In this paper, we find that their method implies an efficient construction of Q. That is to say, Q can be taken as a special block lower triangular matrix with diagonal subblocks being the (n−r) × (n−r) and r × r identity matrices, respectively. Moreover, complexity analysis is made to show the efficiency of the specific construction.

  18. 物流企业人力资源建设初探%A Preliminary Exploration of Human Resources Construction of Logistics Enterprises

    Institute of Scientific and Technical Information of China (English)

    陈佳丽

    2014-01-01

    针对物流企业人力资源的特征,从人力资源规划、招聘与录用、培训开发、绩效考核和薪酬管理等角度探讨了物流企业人力资源建设问题。%In this paper, in view of the characteristics of the human resources of logistics enterprises, we explored the problems in the construction of the human resources system of the logistics enterprises from the aspects of human resources planning, recruitment and enrollment, training and development, performance evaluation, and payment management, etc.

  19. Artificial neural networks versus bivariate logistic regression in prediction diagnosis of patients with hypertension and diabetes

    National Research Council Canada - National Science Library

    Adavi, Mehdi; Salehi, Masoud; Roudbari, Masoud

    2016-01-01

    ...) and Artificial Neutral Network (ANN) in concurrent diagnosis of diabetes and hypertension. This cross-sectional study was performed with 12000 Iranian people in 2013 using stratified- cluster sampling...

  20. Googling social interactions: web search engine based social network construction.

    Science.gov (United States)

    Lee, Sang Hoon; Kim, Pan-Jun; Ahn, Yong-Yeol; Jeong, Hawoong

    2010-07-21

    Social network analysis has long been an untiring topic of sociology. However, until the era of information technology, the availability of data, mainly collected by the traditional method of personal survey, was highly limited and prevented large-scale analysis. Recently, the exploding amount of automatically generated data has completely changed the pattern of research. For instance, the enormous amount of data from so-called high-throughput biological experiments has introduced a systematic or network viewpoint to traditional biology. Then, is "high-throughput" sociological data generation possible? Google, which has become one of the most influential symbols of the new Internet paradigm within the last ten years, might provide torrents of data sources for such study in this (now and forthcoming) digital era. We investigate social networks between people by extracting information on the Web and introduce new tools of analysis of such networks in the context of statistical physics of complex systems or socio-physics. As a concrete and illustrative example, the members of the 109th United States Senate are analyzed and it is demonstrated that the methods of construction and analysis are applicable to various other weighted networks.

  1. Constructing general partial differential equations using polynomial and neural networks.

    Science.gov (United States)

    Zjavka, Ladislav; Pedrycz, Witold

    2016-01-01

    Sum fraction terms can approximate multi-variable functions on the basis of discrete observations, replacing a partial differential equation definition with polynomial elementary data relation descriptions. Artificial neural networks commonly transform the weighted sum of inputs to describe overall similarity relationships of trained and new testing input patterns. Differential polynomial neural networks form a new class of neural networks, which construct and solve an unknown general partial differential equation of a function of interest with selected substitution relative terms using non-linear multi-variable composite polynomials. The layers of the network generate simple and composite relative substitution terms whose convergent series combinations can describe partial dependent derivative changes of the input variables. This regression is based on trained generalized partial derivative data relations, decomposed into a multi-layer polynomial network structure. The sigmoidal function, commonly used as a nonlinear activation of artificial neurons, may transform some polynomial items together with the parameters with the aim to improve the polynomial derivative term series ability to approximate complicated periodic functions, as simple low order polynomials are not able to fully make up for the complete cycles. The similarity analysis facilitates substitutions for differential equations or can form dimensional units from data samples to describe real-world problems.

  2. Planning the City Logistics Terminal Location by Applying the Green p-Median Model and Type-2 Neurofuzzy Network

    Directory of Open Access Journals (Sweden)

    Dragan Pamučar

    2016-01-01

    Full Text Available The paper herein presents green p-median problem (GMP which uses the adaptive type-2 neural network for the processing of environmental and sociological parameters including costs of logistics operators and demonstrates the influence of these parameters on planning the location for the city logistics terminal (CLT within the discrete network. CLT shows direct effects on increment of traffic volume especially in urban areas, which further results in negative environmental effects such as air pollution and noise as well as increased number of urban populations suffering from bronchitis, asthma, and similar respiratory infections. By applying the green p-median model (GMM, negative effects on environment and health in urban areas caused by delivery vehicles may be reduced to minimum. This model creates real possibilities for making the proper investment decisions so as profitable investments may be realized in the field of transport infrastructure. The paper herein also includes testing of GMM in real conditions on four CLT locations in Belgrade City zone.

  3. Planning the City Logistics Terminal Location by Applying the Green p-Median Model and Type-2 Neurofuzzy Network.

    Science.gov (United States)

    Pamučar, Dragan; Vasin, Ljubislav; Atanasković, Predrag; Miličić, Milica

    2016-01-01

    The paper herein presents green p-median problem (GMP) which uses the adaptive type-2 neural network for the processing of environmental and sociological parameters including costs of logistics operators and demonstrates the influence of these parameters on planning the location for the city logistics terminal (CLT) within the discrete network. CLT shows direct effects on increment of traffic volume especially in urban areas, which further results in negative environmental effects such as air pollution and noise as well as increased number of urban populations suffering from bronchitis, asthma, and similar respiratory infections. By applying the green p-median model (GMM), negative effects on environment and health in urban areas caused by delivery vehicles may be reduced to minimum. This model creates real possibilities for making the proper investment decisions so as profitable investments may be realized in the field of transport infrastructure. The paper herein also includes testing of GMM in real conditions on four CLT locations in Belgrade City zone.

  4. Towards a Diagnostic Instrument to Identify Improvement Opportunities for Quality Controlled Logistics in Agrifood Supply Chain Networks

    Directory of Open Access Journals (Sweden)

    Jack G.A.J. van der Vorst

    2011-10-01

    Full Text Available  Western-European consumers have become not only more demanding on product availability in retail outlets but also on other food attributes such as quality, integrity, and safety. When (redesigning food supply-chain networks, from a logistics point of view, one has to consider these demands next to traditional efficiency and responsiveness requirements. The concept ‘quality controlled logistics’ (QCL hypothesizes that if product quality in each step of the supply chain can be predicted in advance, goods flows can be controlled in a pro-active manner and better chain designs can be established resulting in higher product availability, constant quality, and less product losses. The paper discusses opportunities of using real-time product quality information for improvement of the design and management of ‘AgriFood Supply Chain Networks’, and presents a preliminary diagnostic instrument for assessment of ‘critical quality’ and ‘logistics control’ points in the supply chain network. Results of a tomato-chain case illustrate the added value of the QCL concept for identifying improvement opportunities in the supply chain as to increase both product availability and quality. Future research aims for the further development of the diagnostic instrument and the quantification of costs and benefits of QCL scenarios.

  5. Transmission Risks of Schistosomiasis Japonica: Extraction from Back-propagation Artificial Neural Network and Logistic Regression Model

    Science.gov (United States)

    Xu, Jun-Fang; Xu, Jing; Li, Shi-Zhu; Jia, Tia-Wu; Huang, Xi-Bao; Zhang, Hua-Ming; Chen, Mei; Yang, Guo-Jing; Gao, Shu-Jing; Wang, Qing-Yun; Zhou, Xiao-Nong

    2013-01-01

    Background The transmission of schistosomiasis japonica in a local setting is still poorly understood in the lake regions of the People's Republic of China (P. R. China), and its transmission patterns are closely related to human, social and economic factors. Methodology/Principal Findings We aimed to apply the integrated approach of artificial neural network (ANN) and logistic regression model in assessment of transmission risks of Schistosoma japonicum with epidemiological data collected from 2339 villagers from 1247 households in six villages of Jiangling County, P.R. China. By using the back-propagation (BP) of the ANN model, 16 factors out of 27 factors were screened, and the top five factors ranked by the absolute value of mean impact value (MIV) were mainly related to human behavior, i.e. integration of water contact history and infection history, family with past infection, history of water contact, infection history, and infection times. The top five factors screened by the logistic regression model were mainly related to the social economics, i.e. village level, economic conditions of family, age group, education level, and infection times. The risk of human infection with S. japonicum is higher in the population who are at age 15 or younger, or with lower education, or with the higher infection rate of the village, or with poor family, and in the population with more than one time to be infected. Conclusion/Significance Both BP artificial neural network and logistic regression model established in a small scale suggested that individual behavior and socioeconomic status are the most important risk factors in the transmission of schistosomiasis japonica. It was reviewed that the young population (≤15) in higher-risk areas was the main target to be intervened for the disease transmission control. PMID:23556015

  6. Neural network for graphs: a contextual constructive approach.

    Science.gov (United States)

    Micheli, Alessio

    2009-03-01

    This paper presents a new approach for learning in structured domains (SDs) using a constructive neural network for graphs (NN4G). The new model allows the extension of the input domain for supervised neural networks to a general class of graphs including both acyclic/cyclic, directed/undirected labeled graphs. In particular, the model can realize adaptive contextual transductions, learning the mapping from graphs for both classification and regression tasks. In contrast to previous neural networks for structures that had a recursive dynamics, NN4G is based on a constructive feedforward architecture with state variables that uses neurons with no feedback connections. The neurons are applied to the input graphs by a general traversal process that relaxes the constraints of previous approaches derived by the causality assumption over hierarchical input data. Moreover, the incremental approach eliminates the need to introduce cyclic dependencies in the definition of the system state variables. In the traversal process, the NN4G units exploit (local) contextual information of the graphs vertices. In spite of the simplicity of the approach, we show that, through the compositionality of the contextual information developed by the learning, the model can deal with contextual information that is incrementally extended according to the graphs topology. The effectiveness and the generality of the new approach are investigated by analyzing its theoretical properties and providing experimental results.

  7. 基于成本最优的重点物流中心的选定与布局——以福建烟草物流网络为例%Based on the Cost of the Optimal Focus Logistics Center Selection and Layout ——Fujian tobacco logistics network for example

    Institute of Scientific and Technical Information of China (English)

    李志勇

    2012-01-01

    Logistics network system structure clear, related to modern logistics operation efficiency and cost. Regional logistics center to have pri- mary and secondary and hierarchical structure, according to the distribution of scale and efficiency need, need to choose from among several key lo- gistics Center as the key node distribution network construction. In order to realize the key center the optimal coverage, network layout optimiza- tion and the play of function of center.%物流网络体系结构的明晰,关乎现代物流运作的效率和成本。区域内的物流中心要有主次和层级之分,根据配送规模和效率的需要,需从中选出若干重点物流中心作为整个配送物流网络的关键节点来建设。以期实现重点中·心的最优覆盖率、网络的布局优化和中心功能的发挥。

  8. Research on Construction of Comprehensive Evaluation Model of Agriculture Logistics Capability%粮食物流能力综合评价模型构建研究

    Institute of Scientific and Technical Information of China (English)

    洪运华

    2012-01-01

    粮食物流能力是粮食产业链或粮食企业核心能力的重要组成,是实现竞争优势的重要手段。是根食物流系统整体能力的综合反映。文章界定粮食物流能力的内涵,介绍粮食物流能力综合评价指标,构建粮食物流能力综合评价模型。%Agriculture logistics capability is the important composition of grain industry chain or the grain enterprise core ability, is the important method of realizing the competitive advantage, is the synthesis reflection of grain logistics system overall capability. The thesis limits the definition of agriculture logistics capability, introduces comprehensive evaluation indices and constructs comprehensive evaluation model.

  9. Thought on Constructing the Logistics Legal System in China%我国物流法律体系建设的思考

    Institute of Scientific and Technical Information of China (English)

    陈刚; 张敏

    2012-01-01

    The paper first analyzes the current situation of and existing problems in the construction of the logistics legal system in China and in view of the actuality of the formulation of laws and regulations for the logistics industry, argues that logistics legalization should be pushed forward steadily and in order, with several specific measures proposed.%我国物流业的快速发展及物流业在国民经济社会中的重要作用,使得建市统一物流法的呼声越来越高.通过分析现状及存在问题,结合物流业及相关法律制定的实际情况,给出了物流立法应稳健有序进行的基本原则及具体措施.

  10. 浅析建设铁路物流基地的可行途径%Analysis on Feasible Ways to the Construction of Railway Logistic Base

    Institute of Scientific and Technical Information of China (English)

    肖峰

    2014-01-01

    The competition is increasingly fierce along with the development of logistic industry .How to consolidate and expand the market share of railway freight transport?How to occupy the important position of the logistic industry?To speed up the construction of the railway logistics base is one of the strategic for future of China Railway Corporation (CRC).June 15th in 2013,freight organizational reform dominated by CRC changed the original way ,and had a far -reaching impact on business operations and management of railway logistics enterprise .This title will explore the feasible ways of railway logistics enterprises in the development and construction of logistics base under the new situation .%随着物流产业快速发展,竞争也日趋激烈,如何巩固和扩大铁路货运,继续占据物流行业的重要地位,铁路总公司把加快物流基地(园区)建设作为未来发展的总体战略之一。2013年6月15日,铁路实施的货运组织改革改变了原有铁路运输组织方式,对铁路物流企业的经营和管理产生极为深远的影响。文中将探讨铁路物流企业在新的形势下开发建设物流基地的可行途径。

  11. CREATING A RISK-BASED NETWORK FOR HAZMAT LOGISTICS BY ROUTE PRIORITIZATION WITH AHP

    Directory of Open Access Journals (Sweden)

    Watchara SATTAYAPRASERT

    2008-01-01

    A mathematical model, formulated by the criteria priority of each factor and its risk level was used for the prioritization. The results show that participants rank the risk of having a road accident as the top priority, followed by the risk of carriage unit explosion and the consequences of an incident (47.8%, 27.4% and 24.8% respectively. To examine this model, data for logistics of gasoline and diesel fuel in Rayong Province (Thailand were used for the model application. From the calculation, it was possible to reduce the risk of road accidents and the consequences by approximately 6.8% and 38.5% respectively by choosing the best alternative route instead of the current one.

  12. Model for Building a Distribution Network Based on the Multivariate Analysis of the Industrial and Logistical Potential of Regions

    Directory of Open Access Journals (Sweden)

    Alexander Vladimirovich Kirillov

    2015-12-01

    Full Text Available The international integration of the Russian economy is connected to the need of the realization of the competitive advantages of the geopolitical position of Russia, the industrial potential of regions, the logistic infrastructure of transport corridors. This article discusses the design model of the supply chain (distribution network based on the multivariate analysis and the methodology of the substantiation of its configuration based on the cost factors and the level of the logistics infrastructure development. For solving the problem of placing one or more logistics centers in the service area, a two-stage algorithm is used. At the first stage, the decisions on the reasonability of the choice of one or another version of the development are made with А. В. Кириллов, В. Е. Целин 345 ЭКОНОМИКА РЕГИОНА №4 (2015 the use of the “Make or Buy” standard model. The criterion of decision making is the guaranteed overcoming of the threshold of “indifference” taking into account the statistical characteristics of costs for options of “buy” and “make” depending on the volume of consumption of goods or services. At the second stage, the Ardalan’s heuristic method is used for the evaluation of the choice of placing one or more logistics centers in the service area. The model parameters are based on the assessment of the development prospects of the region and its investment potential (existence and composition of employment, production, natural resources, financial and consumer opportunities, institutional, innovation, infrastructure capacity. Furthermore, such criteria as a regional financial appeal, professionally trained specialists, the competitive advantages of the promoted company and others are analyzed. An additional criterion is the development of the priority matrix, which considers such factors as difficulties of customs registration and certification, a level of regional transport

  13. Causality in Psychiatry: A Hybrid Symptom Network Construct Model

    Directory of Open Access Journals (Sweden)

    Gerald eYoung

    2015-11-01

    Full Text Available Causality or etiology in psychiatry is marked by standard biomedical, reductionistic models (symptoms reflect the construct involved that inform approaches to nosology, or classification, such as in the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition; American Psychiatric Association, 2013. However, network approaches to symptom interaction (i.e., symptoms are formative of the construct; e.g., McNally, Robinaugh, Wu, Wang, Deserno, & Borsboom, 2014, for PTSD (posttraumatic stress disorder are being developed that speak to bottom-up processes in mental disorder, in contrast to the typical top-down psychological construct approach. The present article presents a hybrid top-down, bottom-up model of the relationship between symptoms and mental disorder, viewing symptom expression and their causal complex as a reciprocally dynamic system with multiple levels, from lower-order symptoms in interaction to higher-order constructs affecting them. The hybrid model hinges on good understanding of systems theory in which it is embedded, so that the article reviews in depth nonlinear dynamical systems theory (NLDST. The article applies the concept of emergent circular causality (Young, 2011 to symptom development, as well. Conclusions consider that symptoms vary over several dimensions, including: subjectivity; objectivity; conscious motivation effort; and unconscious influences, and the degree to which individual (e.g., meaning and universal (e.g., causal processes are involved. The opposition between science and skepticism is a complex one that the article addresses in final comments.

  14. Causality in Psychiatry: A Hybrid Symptom Network Construct Model

    Science.gov (United States)

    Young, Gerald

    2015-01-01

    Causality or etiology in psychiatry is marked by standard biomedical, reductionistic models (symptoms reflect the construct involved) that inform approaches to nosology, or classification, such as in the DSM-5 [Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition; (1)]. However, network approaches to symptom interaction [i.e., symptoms are formative of the construct; e.g., (2), for posttraumatic stress disorder (PTSD)] are being developed that speak to bottom-up processes in mental disorder, in contrast to the typical top-down psychological construct approach. The present article presents a hybrid top-down, bottom-up model of the relationship between symptoms and mental disorder, viewing symptom expression and their causal complex as a reciprocally dynamic system with multiple levels, from lower-order symptoms in interaction to higher-order constructs affecting them. The hybrid model hinges on good understanding of systems theory in which it is embedded, so that the article reviews in depth non-linear dynamical systems theory (NLDST). The article applies the concept of emergent circular causality (3) to symptom development, as well. Conclusions consider that symptoms vary over several dimensions, including: subjectivity; objectivity; conscious motivation effort; and unconscious influences, and the degree to which individual (e.g., meaning) and universal (e.g., causal) processes are involved. The opposition between science and skepticism is a complex one that the article addresses in final comments. PMID:26635639

  15. Discussion on the Construction of Regional Logistics Growth Pole Model%浅谈区域物流增长极模型的构建

    Institute of Scientific and Technical Information of China (English)

    王娟; 刘勤兰; 李钧

    2011-01-01

    以区域物流及区域经济的理论为基础,具体阐述了区域物流、区域物流中心及区域经济非均衡发展理论——增长极理论,并将其结合提出了增长极物流的概念。区域发展的增长极物流就是在区域内选取经济发展、物流发展及资源禀赋力强的地区作为物流发展的极点城市,对该地区加大发展力度并辐射区域内其余城市,从而带动整个区域物流的发展。最后,在该理论提出的基础上,选取不同评价指标构建了区域物流增长极模型并对其进行诠释以期对区域物流增长极的选取及发展方向提供依据。%Based on the regional logistics and regional economic theory as the foundation,this paper elaborated the specific regional logistics,regional logistics center and the unbalanced regional economic development theory——the theory of growth pole,and the combination of the growth pole of logistics concept.The growth pole of regional development in the area of logistics is the selection of economic development,logistics development and resource endowment and strong area as the city logistics development pole,to this area to increase development strength and radiation area remaining city,thus boosting the development of the regional logistics.Finally,this paper puts forward the theory basis,select the different evaluation index construction of the growth pole of regional logistics model and carries on the explanation to regional logistics growth pole selection and development to provide a basis for the direction.

  16. The Research of Collaborative Logistics Alliance Schema Based on the Theory of Organization Networks%组织网络下的协同物流联盟模式研究

    Institute of Scientific and Technical Information of China (English)

    张梦雅; 张庆英; 索绍婷; 陈鸯; 谭永斌

    2015-01-01

    On the background of economic integration and network organization, basing on the theory of “Collaborative logistics alliance”, this paper makes a depth research on the collaborative logistics service model in logistics enterprise.The collaborative logistics alliance basis of network organization has been put,and building an IFOE model for it.Besides,it will give the detailed analysis of process in dynamic construction.%文中在经济全球化、一体化及组织网络化的大背景下,运用“协同物流联盟”理论对物流企业间协同物流的服务模式进行深入研究,提出了基于组织网络化的协同物流联盟,在此基础上建立了协同物流联盟的IFOE模型,详细分析了基于组织网络化的协同物流联盟动态组建过程。

  17. 智慧物流信息平台的构建%Logistics Information Platform Construction of Wisdom

    Institute of Scientific and Technical Information of China (English)

    罗人述

    2014-01-01

    Intelligent logistics information platform is to provide a Collaboration platformintegrating logistics services.In this paper,it narrates the existing problems of logistics information platform after analyzing the current logistics information platform development situation.And then introduces the architecture of intelligent logistics information platform,then puts forward some suggestions with the case of Guangdong Province.%智慧物流信息平台是提供整合物流产业服务的协同平台。文中通过分析我国目前物流信息平台的发展现状,阐述了物流信息平台建设所存在的问题。然后给出了智慧物流信息平台总体架构的实现,以广东省为例进行分析并提出了智慧物流信息平台建设的建议。

  18. Current Status of Logistics Network Optimization for Fresh Agricultural Product%生鲜农产品物流网络优化的研究现状

    Institute of Scientific and Technical Information of China (English)

    狄卫民; 王黎

    2014-01-01

    为提高生鲜农产品物流网络规划水平,从物流网络概念、运输管理和共同配送三个方面分析了生鲜农产品物流网络优化的定性研究成果,从物流设施选址的多属性决策方法、物流网络优化的混合整数规划方法和融入生鲜农产品腐烂特征的物流网络建模方法三个方面总结了该问题的定量研究成果。%To promote planning level of fresh agricultural product logistics network, this paper analyses the qualitative research findings of the network optimization from such three aspects as logistics network conception, transportation management and joint distribution, surveys the quantitative findings from the following three aspects:multiple attribute decision making method for logistics facility location, mixed integer programming method for logis-tics network optimization and logistics network modeling method with decay characteristics for fresh agricultural prod-uct.

  19. Campaign-level dynamic network modelling for spaceflight logistics for the flexible path concept

    Science.gov (United States)

    Ho, Koki; de Weck, Olivier L.; Hoffman, Jeffrey A.; Shishko, Robert

    2016-06-01

    This paper develops a network optimization formulation for dynamic campaign-level space mission planning. Although many past space missions have been designed mainly from a mission-level perspective, a campaign-level perspective will be important for future space exploration. In order to find the optimal campaign-level space transportation architecture, a mixed-integer linear programming (MILP) formulation with a generalized multi-commodity flow and a time-expanded network is developed. Particularly, a new heuristics-based method, a partially static time-expanded network, is developed to provide a solution quickly. The developed method is applied to a case study containing human exploration of a near-Earth object (NEO) and Mars, related to the concept of the Flexible Path. The numerical results show that using the specific combinations of propulsion technologies, in-situ resource utilization (ISRU), and other space infrastructure elements can reduce the initial mass in low-Earth orbit (IMLEO) significantly. In addition, the case study results also show that we can achieve large IMLEO reduction by designing NEO and Mars missions together as a campaign compared with designing them separately owing to their common space infrastructure pre-deployment. This research will be an important step toward efficient and flexible campaign-level space mission planning.

  20. 逆向物流网络研究综述与展望%Review and Outlook on the Adverse Logistics Network

    Institute of Scientific and Technical Information of China (English)

    左泽平; 谭观音; 徐波

    2012-01-01

    Based on the definition of reverse logistics, the paper reviewed the development, characteristics, framework model, planning and design of reverse logistics. It is found that a universal framework of reverse logistics network structure and multi-cycle, dynamic reverse logistics network planning and design functions needs afurther study.%基于逆向物流的界定,对逆向物流网络的发展、特点、框架模型、规划设计进行综合评述.研究发现,普适性的逆向物流网络结构架构和多周期、动态性的逆向物流网络规划设计函需深入研究.

  1. Optimising reverse logistics network to support policy-making in the case of Electrical and Electronic Equipment.

    Science.gov (United States)

    Achillas, Ch; Vlachokostas, Ch; Aidonis, D; Moussiopoulos, N; Iakovou, E; Banias, G

    2010-12-01

    Due to the rapid growth of Waste Electrical and Electronic Equipment (WEEE) volumes, as well as the hazardousness of obsolete electr(on)ic goods, this type of waste is now recognised as a priority stream in the developed countries. Policy-making related to the development of the necessary infrastructure and the coordination of all relevant stakeholders is crucial for the efficient management and viability of individually collected waste. This paper presents a decision support tool for policy-makers and regulators to optimise electr(on)ic products' reverse logistics network. To that effect, a Mixed Integer Linear Programming mathematical model is formulated taking into account existing infrastructure of collection points and recycling facilities. The applicability of the developed model is demonstrated employing a real-world case study for the Region of Central Macedonia, Greece. The paper concludes with presenting relevant obtained managerial insights. Copyright © 2010 Elsevier Ltd. All rights reserved.

  2. Placing Safety Stock in Logistic Networks under Guaranteed-Service Time Inventory Models: An Application to the Automotive Industry

    Directory of Open Access Journals (Sweden)

    L.A. Moncayo-Martínez

    2014-06-01

    Full Text Available The aim of this paper is to solve the problem of placing safety stock over a Logistic Network (LN that is represented by a Generic Bill of Materials (GBOM. Thus the LN encompasses supplying, assembling, and delivering stages. We describe, in detail, the recursive algorithm based on Dynamic Programming (DP to solve the placing safety stock problem under guaranteed-service time models. We also develop a java-based application (JbA that both models the LN and runs the recursive DP algorithm. We solved a real case of a company that manufactures fixed brake and clutch pedal modules of cars’ brake system. After running JbA, the levels of inventory decreased by zero in 55 out of 65 stages.

  3. Construction of coffee transcriptome networks based on gene annotation semantics.

    Science.gov (United States)

    Castillo, Luis F; Galeano, Narmer; Isaza, Gustavo A; Gaitán, Alvaro

    2012-07-24

    Gene annotation is a process that encompasses multiple approaches on the analysis of nucleic acids or protein sequences in order to assign structural and functional characteristics to gene models. When thousands of gene models are being described in an organism genome, construction and visualization of gene networks impose novel challenges in the understanding of complex expression patterns and the generation of new knowledge in genomics research. In order to take advantage of accumulated text data after conventional gene sequence analysis, this work applied semantics in combination with visualization tools to build transcriptome networks from a set of coffee gene annotations. A set of selected coffee transcriptome sequences, chosen by the quality of the sequence comparison reported by Basic Local Alignment Search Tool (BLAST) and Interproscan, were filtered out by coverage, identity, length of the query, and e-values. Meanwhile, term descriptors for molecular biology and biochemistry were obtained along the Wordnet dictionary in order to construct a Resource Description Framework (RDF) using Ruby scripts and Methontology to find associations between concepts. Relationships between sequence annotations and semantic concepts were graphically represented through a total of 6845 oriented vectors, which were reduced to 745 non-redundant associations. A large gene network connecting transcripts by way of relational concepts was created where detailed connections remain to be validated for biological significance based on current biochemical and genetics frameworks. Besides reusing text information in the generation of gene connections and for data mining purposes, this tool development opens the possibility to visualize complex and abundant transcriptome data, and triggers the formulation of new hypotheses in metabolic pathways analysis.

  4. The Research about the Comparison of RBF Neural Network with Logistic Regression%RBF神经网络与logistic回归模型的对比研究

    Institute of Scientific and Technical Information of China (English)

    姚应水; 叶明全

    2011-01-01

    目的 RBF神经网络是一种重要的数据挖掘分类模型,探讨RBF神经网络在解决判别分析问题中的应用.方法 通过实例比较RBF神经网络和logistic回归模型的性能优劣.结果 RBF神经网络的回代拟合效果和泛化能力明显优于logistic回归模型.结论RBF神经网络在医学统计学领域中具有较好的应用前景.%Objective RBF neural network is an important data mining classification model in data mining. To explore the application of RBF neural network on medical discriminant analysis through comparing with logistic regression. Methods Comparing the prediction results by some statistical indexes of the RBF neural network and the logistic regression by using an example. Results The comparison results of the prediction performance between RBF neural network and logistic regression show that RBF neural network is much better than logistic regression for the data. Conclusion RBF neural network will make a better facture of its appfi-cadon in medical researches.

  5. The Logistic of Empty Containers′ Return in the Liner-Shipping Network

    Directory of Open Access Journals (Sweden)

    Belayachi Naima

    2017-09-01

    Full Text Available The Maritime Transport is a favoured tool regarding the universal exchanges because it has gone through several evolutions. Indeed, the containerization is considered as one of the most remarkable improvements in the shipping. The containers are rented by shipping companies. However, these companies meet an empty container availability problem at some ports of Maritime Transport Network (MTN to satisfy the demands of clients. The objective of this work is to solve the problem of the imbalance of the distribution of containers and look for empty containers at less cost to meet the demands of clients. As a result, the authors propose an application to represent the MTN, and provide a balanced distribution of containers. The work presented in this article is based on a heuristic method by neighbourhood. It allows the process of the clients' demands and transfers of full containers as well as the research of empty containers by optimizing the cost of theirs return.

  6. System Construction of Reverse Logistics of Retired Home Appliance Products%退役家电产品逆向物流体系构建

    Institute of Scientific and Technical Information of China (English)

    何敏; 邓梅玲

    2016-01-01

    In order to construct the reverse logistics system of the retired home appliance products for the household electrical appliance manufacturers, this paper mainly uses the method of literature research, starts from the channel members and channel activities of reverse logistics, and discusses the characteristics of the reverse logistics system of the retired home appliance products in three models, in order to provide an effective way for household electrical ap-pliance manufacturers when choosing the reverse logistics system.%为构建家电生产企业的退役家电产品逆向物流体系,本文主要用文献研究的方法,以逆向物流的渠道成员和渠道活动为出发点,探讨三种模式下的退役家电产品逆向物流体系的特点,为家电生产企业在选择逆向物流体系时提供行之有效的思路和方法。

  7. Modification of the method of construction of value chain industrial enterprises with regard to financial involvement of staff of logistics

    Directory of Open Access Journals (Sweden)

    Butrin A.G.

    2017-01-01

    Full Text Available The article presents the author’s method of building an efficient value chain in an industrial plant, based on a well-known concept of the value of M. Porter, and other members of the Harvard Business School. Its novelty lies in the fact that, first, the operation captured still poorly known financial stream; second, extended value chain border due to the inclusion of all members of the value within the supply chain management concept. This will speed up capital turnover and reduce costs in terms of integration of all participants in the value chain. Cash flow still remains little known in the concepts of financial management and financial logistics. However, the adaptation of key provisions in the crisis lie is the effective use of financial logistics methods.

  8. Olympic Effect on Beijing Logistics

    Institute of Scientific and Technical Information of China (English)

    Guo Liqin

    2008-01-01

    @@ Olympic logistics network as preparationIn 2003, the Beijing municipal government proposed the blueprint for three key logistics projects for the 2008 Olympics. It planned to build three logistics bases (at Yancun in Fangshan District, Majuqiao in Tongzhou, and Shahe in Changping District) along with four logistics centers (at Tianzhu in Chaoyang, Shibajiadian in Chaoyang, Dazhuang in Daxing, and Mentougou).

  9. Hash function construction using weighted complex dynamical networks

    Institute of Scientific and Technical Information of China (English)

    Song Yu-Rong; Jiang Guo-Ping

    2013-01-01

    A novel scheme to construct a hash function based on a weighted complex dynamical network (WCDN) generated from an original message is proposed in this paper.First,the original message is divided into blocks.Then,each block is divided into components,and the nodes and weighted edges are well defined from these components and their relations.Namely,the WCDN closely related to the original message is established.Furthermore,the node dynamics of the WCDN are chosen as a chaotic map.After chaotic iterations,quantization and exclusive-or operations,the fixed-length hash value is obtained.This scheme has the property that any tiny change in message can be diffused rapidly through the WCDN,leading to very different hash values.Analysis and simulation show that the scheme possesses good statistical properties,excellent confusion and diffusion,strong collision resistance and high efficiency.

  10. Analysis of Problems in Construction of Logistics Public Information Platform%物流公共信息平台建设问题探析

    Institute of Scientific and Technical Information of China (English)

    林秋平

    2012-01-01

    In this paper, we proposed the three modes of the operation of the logistics information platform, which were government sponsored mode, enterprise independent investment mode and enterprise-dominated and government-supported mode, which could, hopefully, provide reference in the construction of the logistics public information platform.%针对物流公共信息平台在建设过程中存在的像平台生存的诚信环境的建立、平台的盈利模式、平台的定位等问题,提出物流信息平台运营的三种模式,即政府出资建设模式、企业自主投资建设模式和“政府搭台、企业唱戏”模式,希望能对物流信息建设提供参考.

  11. 景区物流管理信息系统的构建探讨%Construction of Logistics Management Information System of Scenic Spots

    Institute of Scientific and Technical Information of China (English)

    蔡登火

    2012-01-01

    以景区物流作为切入视角,阐述了景区物流管理信息系统的架构模式,探讨了景区物流管理信息系统的构建策略,以期使我国景区、景点等地方物流经济以及服务水准得到大幅度提升,从而取得良好经济收益.%In this paper we elaborated on the architecture and mode of the logistics management information system of scenic spots and discussed the strategy for its construction in a bid to improve the local logistics economy and service level of the scenic areas and spots of China.

  12. A simulation-based robust biofuel facility location model for an integrated bio-energy logistics network

    Directory of Open Access Journals (Sweden)

    Jae-Dong Hong

    2014-10-01

    Full Text Available Purpose: The purpose of this paper is to propose a simulation-based robust biofuel facility location model for solving an integrated bio-energy logistics network (IBLN problem, where biomass yield is often uncertain or difficult to determine.Design/methodology/approach: The IBLN considered in this paper consists of four different facilities: farm or harvest site (HS, collection facility (CF, biorefinery (BR, and blending station (BS. Authors propose a mixed integer quadratic modeling approach to simultaneously determine the optimal CF and BR locations and corresponding biomass and bio-energy transportation plans. The authors randomly generate biomass yield of each HS and find the optimal locations of CFs and BRs for each generated biomass yield, and select the robust locations of CFs and BRs to show the effects of biomass yield uncertainty on the optimality of CF and BR locations. Case studies using data from the State of South Carolina in the United State are conducted to demonstrate the developed model’s capability to better handle the impact of uncertainty of biomass yield.Findings: The results illustrate that the robust location model for BRs and CFs works very well in terms of the total logistics costs. The proposed model would help decision-makers find the most robust locations for biorefineries and collection facilities, which usually require huge investments, and would assist potential investors in identifying the least cost or important facilities to invest in the biomass and bio-energy industry.Originality/value: An optimal biofuel facility location model is formulated for the case of deterministic biomass yield. To improve the robustness of the model for cases with probabilistic biomass yield, the model is evaluated by a simulation approach using case studies. The proposed model and robustness concept would be a very useful tool that helps potential biofuel investors minimize their investment risk.

  13. Network design and operational modelling for construction green supply chain management

    Directory of Open Access Journals (Sweden)

    Pengfei Zhou Dong Chen

    2013-01-01

    Full Text Available Based on studying organizational structure of Construction Green Supply Chain Management (CGSCM, a mathematical programming model of CGSCM was proposed. The model aimed to maximize the aggregate profits of normalized construction logistics, the reverse logistics and the environmental performance. Numerical experiments show that the proposed approach can improve the aggregate profit effectively. In addition, return ratio, subsidies from governmental organizations, and environmental performance were analyzed for CGSCM performance. Herein, the proper return, subsidy and control strategy could optimize construction green supply chain.

  14. Research of the Reliability of Agile Logistics Network on Agro-Product%敏捷农产品物流网络可靠性研究

    Institute of Scientific and Technical Information of China (English)

    冯国壁; 刘罡; 王伟; 李学军

    2012-01-01

    物流网络的可靠性是衡量农产品物流能否及时顺利地完成指定任务的重要指标。在实际网络中每条边的容量都可以取不同的值或失效,状态是随机的。对于易腐性的农产品来说,物流网络的可靠性就更为重要了。文章提出用随机流网络来模拟农产品物流网络,并加上时间的限定来体现敏捷性的要求,用在最小割集基础上的一种简单的方法来评价敏捷农产品物流网络的可靠性。%Reliability of logistics network is important indices to measure whether agro-product logistics can successful accomplish the appointive task in time. In the real network, every arcs all have several possible capacities and may fail, their states are randomness. To perishable agro-product, the reliability of logistics network is more important. This paper proposes a stochastic flow network for simulating agile logistics network on agro-product, and adds the time constraint to reflect the demand of agility. In addition, it uses a simple algorithm based on minimal cuts to evaluate the reliability of agile agro-product logistics network under time constraint.

  15. Analysis of Characteristics of Logistics Scale-Free Distribution Network%物流配送网络的无标度网络特征研究

    Institute of Scientific and Technical Information of China (English)

    张旭凤; 张永安

    2011-01-01

    The paper analyzes the process of the simple-to-complex evolution of logistics distribution networks. Using a typical logistics distribution network operated by a third-party logistics company as the foundation of the study and its logistics distribution network practical operation as the study object, the paper records the node relationship through a large number of site surveys, and calculates the node degree distribution of the logistics distribution network using MATLAB Program. The result of the calculation proves that power law index of the node degree distribution is in compliance with the characteristics of the scale-free network, which provides the theoretical basis for establishing a generative model of the distribution nodes and client nodes in the network.%首先分析了物流配送网络逐渐由简单到复杂的演变过程,然后以一类典型第三方物流企业为主体的物流配送网络为基础,以实际运营的物流配送网络为研究对象,通过大量调研记录网络中各个节点之间的关系,利用MATLAB程序实现物流配送网络节点度分布的计算,最后通过计算结果分析发现节点度分布的幂律指数符合无标度网络的特征,以物流配送网络无标度网络的特征为基础,为建立物流配送网络中的配送节点和客户节点的生成模型提供理论基础.

  16. Logistics Information System Construction in Military Medical University%军医大学后勤信息系统建设初探

    Institute of Scientific and Technical Information of China (English)

    孙晓希; 李玮

    2011-01-01

    研究军医大学信息化建设过程中遇到的问题,针对后勤信息信息系统、业务管理系统、日常保障系统等三级后勤信息系统建设进行论证和分析.结合实际对军医大学后勤保障信息化系统的建设和发展探讨,充分利用学校科研资源、先进设备,走具有军医大学特色的信息化建设道路.%The article focused on the problems of the military medical university information construction. The author demonstrated and analyzed the logistics information systems, business management systems, daily support system, and also discussed the construction and development of the Logistics support information system. The author suggested that military medical university should make full use of the school research resources, advanced e-quipments, to proceed to the distinctive information construction way.

  17. Study on the Construction and Optimization of Hubei Coal Logistics System%湖北煤炭物流系统构建及优化研究

    Institute of Scientific and Technical Information of China (English)

    尤美虹; 胡榆; 陶君成

    2016-01-01

    煤炭是湖北的主要能源,占全省能源消费总量的比重为62%。湖北既是一个用煤大省,又是一个产煤小省,93%以上的煤炭、98%以上的电煤消费需要依靠外省调入。发展现代煤炭物流,优化煤炭物流系统,对提高物流效率、降低物流成本、增强煤炭稳定供应能力、保障全省能源安全具有重要意义。文中以能源和物流两个视角,分析了湖北煤炭物流发展面临的挑战,从规划、运行及监管方面提出了煤炭物流系统构建和运行优化策略。%Coal is the main energy in Hubei,accounting for the proportion of the total energy consumption of the province is 62%.Hubei is a big province with coal,but also a small coal producing province,more than 93% of coal,more than 98% of the electricity consumption need rely on other provinces transferred.Developing modern coal logistics,optimizing the coal logistics system,to improve the efficiency of logistics,reduce logistics costs,and enhance the stability of coal supply capacity,to protect the province's energy security is of great significance.Based on two perspectives of energy and logistics,this paper analyzes the challenges facing the development of Hubei coal logistics,and puts forward the construction and operation optimization strategy of the coal logistics system from the aspects of planning,operation and supervision.

  18. 考虑随机行驶时间的商贸物流网络设计问题研究%Study on Trade Logistics Network Design with Stochastic Traveling Time Consideration

    Institute of Scientific and Technical Information of China (English)

    景春光

    2016-01-01

    In this paper, in view of the issues in the design of the trade logistics network and with the minimal network establishment cost as the target, we attempted to finalize the location of the various levels of distribution centers on the network and the running route of the logistics vehicles. During the optimization process, we considered the stochasticity of the traveling time of the logistics vehicles and established the programming model targeting at minimizing the total distribution center construction cost and the expected logistics distribution cost. Then we adopted the genetic algorithm to solve the model and presented the programming and calculation steps. At the end, through a numerical example, we demonstrated the validity of the model and algorithm.%针对商贸物流网络设计问题,以最小化商贸物流网络构建成本为优化目标,同时决策商贸物流各级配送中心的选址与商贸物流车辆的配送路径。在优化过程中考虑物流车辆行驶时间具有随机特性,以各级配送中心建设成本最小化、物流配送成本期望值最小化为目标,构建了多目标规划模型。选用遗传算法提出了设计模型的求解算法并给出了编码设置,物流配送成本计算等关键步骤设计。最后,采取算例验证了模型与算法的有效性。

  19. 广西电子废弃物逆向物流网络模糊规划设计%A Network Design Based on the Fuzzy Programming of Guangxi WEEE of the Reverse Logistics

    Institute of Scientific and Technical Information of China (English)

    邱建伟; 刘枚莲

    2012-01-01

    With the coming of low-carbon times, a large number of electronic waste has appeared. More emphasis has been placed on how to recycle and dispose of electrical waste and electronic equipment effectively. During the process of resource utilization of electronic waste, the construction of the reverse logistics network is considered as a key link. Efforts should be made to design the reverse logistics network of electronic waste, to use fuzzy parameters to describe the uncertain recovery quantity, to construct network models of the reverse logistics of electronic waste , to make the idea and the method of fuzzy programming, and to solve the question with clariy method. This essay is to analyze the models according to different confidence levels so that conclusion could be made to establish the transfer warehouses, the treatment centers and the landfill sites in Nanning, Guigang and Liuzhou.%随着低碳时代的到来,如何有效回收和处理日益增多的电子废弃物已引起人们高度关注.在电子废弃物资源化利用过程中,逆向物流网络构建是一个关键环节.设计电子废弃物逆向物流网络,利用模糊参数描述不确定的回收量,构建电子废弃物逆向物流网络模型,借助模糊规划思想和解决方法,将所建模糊规划模型清晰化求解.针对不同置信水平对模型进行分析,得出在南宁、贵港及柳州建立中转仓库、处理中心和填埋场.

  20. Role of logistics centres in national logistics system

    Directory of Open Access Journals (Sweden)

    2010-06-01

    Full Text Available This article presents a division of logistics centres according to various criteria and specifies their role in a national logistics system. It provides a classification of the main logistics network nodes. It also describes those features of logistics centres that have an impact on zoning development of towns and regions. The current situation in the national logistics system has been presented here against theoretical analyses and also a concept for the development of a logistics centre network in Poland has been formulated.

  1. LOGISTICS IN KNOWLEDGE BASED ECONOMY

    OpenAIRE

    Stefan NEDELEA

    2013-01-01

    In the context of contemporary economy logistics changes refer to the emergence of new inter-organizational logistics structures such as logistics networks, and to a number of alterations in organizations’ vision and conduct regarding the role and importance of knowledge. The research focuses on identifying the instruments promoting inter-organizational knowledge transfer within logistics networks provided that each organization relies on its own knowledge and organizational skills to ensure ...

  2. LOGISTICS IN KNOWLEDGE BASED ECONOMY

    OpenAIRE

    Stefan NEDELEA

    2013-01-01

    In the context of contemporary economy logistics changes refer to the emergence of new inter-organizational logistics structures such as logistics networks, and to a number of alterations in organizations’ vision and conduct regarding the role and importance of knowledge. The research focuses on identifying the instruments promoting inter-organizational knowledge transfer within logistics networks provided that each organization relies on its own knowledge and organizational skills to ensure ...

  3. Eco-efficient based logistics network design in hybrid manufacturing/ remanufacturing system in low-carbon economy

    Directory of Open Access Journals (Sweden)

    Yacan Wang

    2013-03-01

    Full Text Available Purpose: Low-carbon economy requires the pursuit of eco-efficiency, which is a win-win situation between economic and environmental efficiency. In this paper the question of trading off the economic and environmental effects embodied in eco-efficiency in the hybrid manufacturing/remanufacturing logistics network design in the context of low-carbon economy is examined.Design/methodology/approach: A multi-objective mixed integer linear programming model to find the optimal facility locations and materials flow allocation is established. In the objective function, three minimum targets are set: economic cost, CO2 emission and waste generation. Through an iterative algorithm, the Pareto Boundary of the problem is obtained.Findings: The results of numeric study show that in order to achieve a Pareto improvement over an original system, three of the critical rates (i.e. return rate, recovery rate, and cost substitute rate should be increased.Practical implications: To meet the need of low-carbon dioxide, an iso- CO2 emission curve in which decision makers have a series of optimal choices with the same CO2 emission but different cost and waste generation is plotted. Each choice may have different network design but all of these are Pareto optimal solutions, which provide a comprehensive evaluation of both economics and ecology for the decision making.Originality/value: This research chooses carbon emission as one of the three objective functions and uses Pareto sets to analyze how to balance profitability and environmental impacts in designing remanufacturing closed-loop supply chain in the context of low-carbon economy.

  4. Weifang Logistics Industry Development and the Construction of Talent Team%潍坊物流产业发展与物流人才队伍建设

    Institute of Scientific and Technical Information of China (English)

    赵小娟

    2013-01-01

      The logistics is an important part of service industry, it has the huge development potential and broad prospects. Weifang has the good condition and unique advantage turning into Shandong Peninsula logistics center, as it has superior location, convenient transportation, rich resources and good logistics service. This paper, put forward the countermeasures about related key emphasis in work and the construction of talent team.%  物流业是服务业的重要组成部分,发展潜力巨大,前景十分广阔。潍坊区位优越、交通便捷、资源丰富、物流服务水平较高,具有发展成为山东半岛物流中心的良好条件和独特优势。本文对相关工作重点和物流人才队伍建设提出对策。

  5. Hospital Logistics Management Based on Network Environment%依托网络环境规范医院后勤管理

    Institute of Scientific and Technical Information of China (English)

    马晓明

    2013-01-01

    Purpose To mining using the network environment , improve logistics standardization manage-ment.Method Relying on the office network to complete the line pipe network teaching special education; And used of office software to control the small and scattered unit personnel , material distribution, equipment mainte-nance, asset management.Result The office network system using the human , financial, material management, improved logistics service quality and efficiency , standardized material flow in order so that work really into stand-ardized logistics management.Conclusion The paperless office model based on network environment , simplified the complex logistics management, effectively avoiding the traditional logistics management inefficient and cumber -some state.%目的:挖掘利用网络环境,搞好后勤规范化管理。方法依托办公网络,以网络授课完成行管专题教育;利用办公软件实现对小散单位人员管控、物资发放、设备维修、资产管理。结果利用办公网络系统进行人、财、物管理,提高后勤服务质量和效率,规范物资流通秩序,使后勤管理进入规范化。结论网络环境下的无纸化办公模式,将复杂的后勤管理工作简便化,有效避免传统的后勤管理状态下的低效与繁琐。

  6. Seismic features and automatic discrimination of deep and shallow induced-microearthquakes using neural network and logistic regression

    Science.gov (United States)

    Mousavi, S. Mostafa; Horton, Stephen, P.; Langston, Charles A.; Samei, Borhan

    2016-07-01

    We develop an automated strategy for discriminating deep microseismic events from shallow ones on the basis of the waveforms recorded on a limited number of surface receivers. Machine-learning techniques are employed to explore the relationship between event hypocenters and seismic features of the recorded signals in time, frequency, and time-frequency domains. We applied the technique to 440 microearthquakes -1.7deep and shallow events based on the knowledge gained from existing patterns. The cross validation test showed that events with depth shallower than 250 m can be discriminated from events with hypocentral depth between 1000 to 2000 m with 88% and 90.7% accuracy using logistic regression (LR) and artificial neural network (ANN) models, respectively. Similar results were obtained using single station seismograms. The results show that the spectral features have the highest correlation to source depth. Spectral centroids and 2D cross-correlations in the time-frequency domain are two new seismic features used in this study that showed to be promising measures for seismic event classification. The used machine learning techniques have application for efficient automatic classification of low energy signals recorded at one or more seismic stations.

  7. Seismic features and automatic discrimination of deep and shallow induced-microearthquakes using neural network and logistic regression

    Science.gov (United States)

    Mousavi, S. Mostafa; Horton, Stephen P.; Langston, Charles A.; Samei, Borhan

    2016-10-01

    We develop an automated strategy for discriminating deep microseismic events from shallow ones on the basis of the waveforms recorded on a limited number of surface receivers. Machine-learning techniques are employed to explore the relationship between event hypocentres and seismic features of the recorded signals in time, frequency and time-frequency domains. We applied the technique to 440 microearthquakes -1.7 train the system to discriminate between deep and shallow events based on the knowledge gained from existing patterns. The cross-validation test showed that events with depth shallower than 250 m can be discriminated from events with hypocentral depth between 1000 and 2000 m with 88 per cent and 90.7 per cent accuracy using logistic regression and artificial neural network models, respectively. Similar results were obtained using single station seismograms. The results show that the spectral features have the highest correlation to source depth. Spectral centroids and 2-D cross-correlations in the time-frequency domain are two new seismic features used in this study that showed to be promising measures for seismic event classification. The used machine-learning techniques have application for efficient automatic classification of low energy signals recorded at one or more seismic stations.

  8. PRODUCTION NETWORKS, AND DIGITAL LOGISTICS AS A TOOL FOR REGIONAL DEVELOPMENT: THE WOOD PROCESSING INDUSTRY IN THE CITY OF BURI, SÃO PAULO

    Directory of Open Access Journals (Sweden)

    Eunice Helena Sguizzardi Abascal

    2010-11-01

    Full Text Available In Brazil municipalities and regions face nowadays plenty of challenges to achieve a sustainable development founded in logistic and productive relationship networks. These networks and respective operations require knowledge and domain of productive possibilities and business opportunities that can develop themselves in regional and endogenous territorial scales. These challenges derive of the fact that municipalities are part of many government and administrative regions in brazilian states to actuate in solidary and synergic way, potentializing relationships with respective congeners. Networks formation requests a rigorous knowledge of the socioeconomic conditions, the municipalities and the regions characters, and it requests TIC (Communication and Information Technologies instrumental use, being able to give ways to expand and to know the social actors that are related and their potential partners through digital networks. This type of networks enables a synchronic management of territorial and economic complexities, in real time (just in time. This article analyzes by critical way the causes of socioeconomic depression of Sao Paulo State southwest region, with the objective of identifying the responsible factors of its stagnation. It also analyzes specific characteristics of Buri Municipality that is situated in southwest Sao Paulo State region. Showing business networks formation based on the transformation wood industry. This natural product is available in the region, here we investigate the local development possibilities, productive and logistic networks (Material Networks and we suggest digital networks use. These actions not just only create regional advantages, but indeed releases Sao Paulo metropolis: either its spaces and its circulation highways, unduly congested due vehicle concentration that is responsible by transport, state and federal logistic.

  9. Comparative analysis of false discovery rate methods in constructing metabolic association networks.

    Science.gov (United States)

    Koo, Imhoi; Yao, Sen; Zhang, Xiang; Kim, Seongho

    2014-08-01

    Gaussian graphical model (GGM)-based method, a key approach to reverse engineering biological networks, uses partial correlation to measure conditional dependence between two variables by controlling the contribution from other variables. After estimating partial correlation coefficients, one of the most critical processes in network construction is to control the false discovery rate (FDR) to assess the significant associations among variables. Various FDR methods have been proposed mainly for biomarker discovery, but it still remains unclear which FDR method performs better for network construction. Furthermore, there is no study to see the effect of the network structure on network construction. We selected the six FDR methods, the linear step-up procedure (BH95), the adaptive linear step-up procedure (BH00), Efron's local FDR (LFDR), Benjamini-Yekutieli's step-up procedure (BY01), Storey's q-value procedure (Storey01), and Storey-Taylor-Siegmund's adaptive step-up procedure (STS04), to evaluate their performances on network construction. We further considered two network structures, random and scale-free networks, to investigate their influence on network construction. Both simulated data and real experimental data suggest that STS04 provides the highest true positive rate (TPR) or F1 score, while BY01 has the highest positive predictive value (PPV) in network construction. In addition, no significant effect of the network structure is found on FDR methods.

  10. 物流公共信息平台建设问题研究%Study on Construction of Logistics Public Information Platform

    Institute of Scientific and Technical Information of China (English)

    杨翠

    2012-01-01

    介绍了物流公共信息平台及其结构体系,分析了建设物流公共信息平台的重要意义,以及建设物流公共信息平台的三种主要服务模式.针对目前物流公共信息平台建设过程中存在的问题,提出了构建物流公共信息平台的原则.%The paper first introduces the structural system of a logistics public information platform, analyzes the significance and three major service modes of its construction and in view of the existing problems, proposes the principles to be followed in the construction process.

  11. Evaluation of Performance of Logistics Park Construction Projects%物流园区建设项目绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    邱慧芳; 郝生跃

    2012-01-01

    为了有效评价物流园区建设阶段的绩效,以及为物流园区的后续运营提供良好条件,构建物流园区建设项目绩效评价模型,包括客观性的“硬绩效”和主观性的“软绩效”,使得评价指标体系更符合实际;最后结合层次分析法和专家打分法对某市物流园区建设项目的绩效评价进行案例分析.%To evaluate the performance of the construction of a logistics park and to create beneficial conditions for its smooth running, the paper establishes the evaluation index system which considers the objective "hard performance" as well as the subjective "soft performance", making the results obtained truer to the practical situation. Then a case study is conducted on the logistics park construction project in a certain city using AHP and expert scoring.

  12. 舟山国际物流岛建设路径分析与选择%Path Analysis and Choice on Construction of Zhoushan International Logistic Island

    Institute of Scientific and Technical Information of China (English)

    庄韶辉

    2012-01-01

    Based on the construction connotation and objectives of Zhoushan International Logistic Island, an analysis has been made on the internal and extemal environment which influences the fulfillment of the objectives under the SWOT analytical method. In accordance with the analysis, and also followed by the principles of "Making full use of opportunities, avoiding threats, developing strengths and overcoming weaknesses" ,coping strategies have been tentatively proposed in response to different environmental combination in this paper, which are also used as the basic path of the construction of Zhoushan International Logistic Island.%文章在提出舟山国际物流岛建设内涵及目标的基础上,运用SWOT分析方法,对影响目标达成的内、外部环境进行了分析,根据分析情况并遵循“利用机遇,回避威胁,发挥优势,克服劣势”的原则,拟定了不同环境组合下的应对策略,以此作为舟山国际物流岛建设的基本路径。

  13. 浅论逆向物流网络及其价值分析%Analysis of the Reverse Logistics Network and Its Value

    Institute of Scientific and Technical Information of China (English)

    孙丹; 于晓龙

    2014-01-01

    逆向物流日益引起企业的广泛重视。本文着重分析了其产生来源,介绍了物流网络结构的四种基本类型,并对逆向物流网络进行了价值分析,认为企业通过构建逆向物流网络能够有效降低企业成本,提升企业竞争力;提高顾客满意程度,提升企业形象;保护环境,承担社会责任。%Reverse logistics has attracted wide attention of enterprises recently. This paper mainly analyzes its origin, introduces four basic types of logistics network structure of reverse logistics network, and analyses its value, proposes that enterprises can effectively reduce the cost of enterprise, enhance the competitiveness of enterprises through the establishment of reverse logistics network, improve customer satisfaction, enhance corporate image;protect environment and achieve social responsibility.

  14. 基于蜂窝技术的物流网络模式探讨%To discuss the logistics model in the view of enterprise network

    Institute of Scientific and Technical Information of China (English)

    李菲; 徐艳梅

    2011-01-01

    经济全球化,世界工厂的出现,把物流从企业业务中分离出来,并进一步将其置于网络之中。本文采用企业网络的观点分析物流的网络化发展趋势,提出一种基于蜂窝技术的物流网络模式,通过此模式的研究对我国物流企业未来的发展提供一定的启示。%As the appearance of words such as "The economical globalization" and "the industrial workshop of the world", logistics has been detached from the business of the enterprises, and further put in the network. On the basis of analysis of the logistics enterprise networking trends in the network view, the article puts forward a logistics model based on cellular technology. The model will provide some enlightenment for the future development of China's logistics enterprises.

  15. Reverse Logistics

    OpenAIRE

    Kulikova, Olga

    2016-01-01

    This thesis was focused on the analysis of the concept of reverse logistics and actual reverse processes which are implemented in mining industry and finding solutions for the optimization of reverse logistics in this sphere. The objective of this paper was the assessment of the development of reverse logistics in mining industry on the example of potash production. The theoretical part was based on reverse logistics and mining waste related literature and provided foundations for further...

  16. TripNet: A Heuristic Algorithm for Constructing Rooted Phylogenetic Networks from Triplets

    CERN Document Server

    Poormohammadi, Hadi; Tusserkani, Ruzbeh

    2012-01-01

    The problem of constructing an optimal rooted phylogenetic network from a set of rooted triplets is an NP-hard problem. In this paper, we present a heuristic algorithm called TripNet which tries to construct an optimal rooted phylogenetic network from an arbitrary set of triplets. We prove some theorems to justify the performance of the algorithm.

  17. 美军物流标准化建设的现状、特点与启示%Status, Feature, and Inspiration of Construction of US Military Logistics Standardization

    Institute of Scientific and Technical Information of China (English)

    焦红; 杨会军; 王敏; 黄秋爽

    2011-01-01

    重点研究了美军物流标准化建设的现状、内容及特点,在此基础上结合我军物流建设实际,提出了对策和建议,对我军军事物流建设有着重要现实意义。%The status, content, and feature of US military logistics standardization was studied. Countermeasures for logistics construction of our army were put forward through analysis of the actuality. The purpose was to provide reference for logistics construction of our army.

  18. SELECTED PROBLEMS OF REVERSE LOGISTICS IN POLAND

    OpenAIRE

    Agata Mesjasz-Lech

    2009-01-01

    This paper presents the essence of reverse logistics and directions of physical and information flows between logistic network partners. It also analyses effects of implementation of the principles of reverse logistics in Poland in the years 2004-2007

  19. A Remote Sensing Based Approach for the Assessment of Debris Flow Hazards Using Artificial Neural Network and Binary Logistic Regression Modeling

    Science.gov (United States)

    El Kadiri, R.; Sultan, M.; Elbayoumi, T.; Sefry, S.

    2013-12-01

    Efforts to map the distribution of debris flows, to assess the factors controlling their development, and to identify the areas prone to their development are often hampered by the absence or paucity of appropriate monitoring systems and historical databases and the inaccessibility of these areas in many parts of the world. We developed methodologies that heavily rely on readily available observations extracted from remote sensing datasets and successfully applied these techniques over the the Jazan province, in the Red Sea hills of Saudi Arabia. We first identified debris flows (10,334 locations) from high spatial resolution satellite datasets (e.g., GeoEye, Orbview), and verified a subset of these occurrences in the field. We then constructed a GIS to host the identified debris flow locations together with co-registered relevant data (e.g., lithology, elevation) and derived products (e.g., slope, normalized difference vegetation index, etc). Spatial analysis of the data sets in the GIS sets indicated various degrees of correspondence between the distribution of debris flows and various variables (e.g., stream power index, topographic position index, normalized difference vegetation index, distance to stream, flow accumulation, slope and soil weathering index, aspect, elevation) suggesting a causal effect. For example, debris flows were found in areas of high slope, low distance to low stream orders and low vegetation index. To evaluate the extent to which these factors control landslide distribution, we constructed and applied: (1) a stepwise input selection by testing all input combinations to make the final model more compact and effective, (2) a statistic-based binary logistic regression (BLR) model, and (3) a mathematical-based artificial neural network (ANN) model. Only 80% (8267 locations) of the data was used for the construction of each of the models and the remaining samples (2067 locations) were used for the accuracy assessment purposes. Results

  20. Comparison of artificial neural network and logistic regression models for predicting in-hospital mortality after primary liver cancer surgery.

    Directory of Open Access Journals (Sweden)

    Hon-Yi Shi

    Full Text Available BACKGROUND: Since most published articles comparing the performance of artificial neural network (ANN models and logistic regression (LR models for predicting hepatocellular carcinoma (HCC outcomes used only a single dataset, the essential issue of internal validity (reproducibility of the models has not been addressed. The study purposes to validate the use of ANN model for predicting in-hospital mortality in HCC surgery patients in Taiwan and to compare the predictive accuracy of ANN with that of LR model. METHODOLOGY/PRINCIPAL FINDINGS: Patients who underwent a HCC surgery during the period from 1998 to 2009 were included in the study. This study retrospectively compared 1,000 pairs of LR and ANN models based on initial clinical data for 22,926 HCC surgery patients. For each pair of ANN and LR models, the area under the receiver operating characteristic (AUROC curves, Hosmer-Lemeshow (H-L statistics and accuracy rate were calculated and compared using paired T-tests. A global sensitivity analysis was also performed to assess the relative significance of input parameters in the system model and the relative importance of variables. Compared to the LR models, the ANN models had a better accuracy rate in 97.28% of cases, a better H-L statistic in 41.18% of cases, and a better AUROC curve in 84.67% of cases. Surgeon volume was the most influential (sensitive parameter affecting in-hospital mortality followed by age and lengths of stay. CONCLUSIONS/SIGNIFICANCE: In comparison with the conventional LR model, the ANN model in the study was more accurate in predicting in-hospital mortality and had higher overall performance indices. Further studies of this model may consider the effect of a more detailed database that includes complications and clinical examination findings as well as more detailed outcome data.

  1. Classification of Urban Aerial Data Based on Pixel Labelling with Deep Convolutional Neural Networks and Logistic Regression

    Science.gov (United States)

    Yao, W.; Poleswki, P.; Krzystek, P.

    2016-06-01

    The recent success of deep convolutional neural networks (CNN) on a large number of applications can be attributed to large amounts of available training data and increasing computing power. In this paper, a semantic pixel labelling scheme for urban areas using multi-resolution CNN and hand-crafted spatial-spectral features of airborne remotely sensed data is presented. Both CNN and hand-crafted features are applied to image/DSM patches to produce per-pixel class probabilities with a L1-norm regularized logistical regression classifier. The evidence theory infers a degree of belief for pixel labelling from different sources to smooth regions by handling the conflicts present in the both classifiers while reducing the uncertainty. The aerial data used in this study were provided by ISPRS as benchmark datasets for 2D semantic labelling tasks in urban areas, which consists of two data sources from LiDAR and color infrared camera. The test sites are parts of a city in Germany which is assumed to consist of typical object classes including impervious surfaces, trees, buildings, low vegetation, vehicles and clutter. The evaluation is based on the computation of pixel-based confusion matrices by random sampling. The performance of the strategy with respect to scene characteristics and method combination strategies is analyzed and discussed. The competitive classification accuracy could be not only explained by the nature of input data sources: e.g. the above-ground height of nDSM highlight the vertical dimension of houses, trees even cars and the nearinfrared spectrum indicates vegetation, but also attributed to decision-level fusion of CNN's texture-based approach with multichannel spatial-spectral hand-crafted features based on the evidence combination theory.

  2. Modeling social influence through network autocorrelation : constructing the weight matrix

    NARCIS (Netherlands)

    Leenders, RTAJ

    2002-01-01

    Many physical and social phenomena are embedded within networks of interdependencies, the so-called 'context' of these phenomena. In network analysis, this type of process is typically modeled as a network autocorrelation model. Parameter estimates and inferences based on autocorrelation models, hin

  3. Methodologies for the assessment of earthquake-triggered landslides hazard. A comparison of Logistic Regression and Artificial Neural Network models.

    Science.gov (United States)

    García-Rodríguez, M. J.; Malpica, J. A.; Benito, B.

    2009-04-01

    In recent years, interest in landslide hazard assessment studies has increased substantially. They are appropriate for evaluation and mitigation plan development in landslide-prone areas. There are several techniques available for landslide hazard research at a regional scale. Generally, they can be classified in two groups: qualitative and quantitative methods. Most of qualitative methods tend to be subjective, since they depend on expert opinions and represent hazard levels in descriptive terms. On the other hand, quantitative methods are objective and they are commonly used due to the correlation between the instability factors and the location of the landslides. Within this group, statistical approaches and new heuristic techniques based on artificial intelligence (artificial neural network (ANN), fuzzy logic, etc.) provide rigorous analysis to assess landslide hazard over large regions. However, they depend on qualitative and quantitative data, scale, types of movements and characteristic factors used. We analysed and compared an approach for assessing earthquake-triggered landslides hazard using logistic regression (LR) and artificial neural networks (ANN) with a back-propagation learning algorithm. One application has been developed in El Salvador, a country of Central America where the earthquake-triggered landslides are usual phenomena. In a first phase, we analysed the susceptibility and hazard associated to the seismic scenario of the 2001 January 13th earthquake. We calibrated the models using data from the landslide inventory for this scenario. These analyses require input variables representing physical parameters to contribute to the initiation of slope instability, for example, slope gradient, elevation, aspect, mean annual precipitation, lithology, land use, and terrain roughness, while the occurrence or non-occurrence of landslides is considered as dependent variable. The results of the landslide susceptibility analysis are checked using landslide

  4. 关于加强军事物流学科专业建设的认识与思考%Reflections on Strengthening Construction of Disciplinary Specialty of Military Logistics

    Institute of Scientific and Technical Information of China (English)

    刘士通; 段秀兵; 荀烨; 刘文开

    2013-01-01

    To strengthen the construction of the disciplinary specialty of military logistics,is the inevitable requirement of training high-quality military logistics talents. According to the present situation of the construction of the disciplinary spe-cialty of military logistics,the construction goal,development direction and planning scheme,of the disciplinary specialty of military logistics,is discussed in this paper.%  加强军事物流学科专业建设,是培养高素质军事物流人才的必然要求。针对学院军事物流学科专业建设现状,就军事物流学科专业建设目标、发展方向、规划方案等问题进行了探讨。

  5. Employing Social Network Construction and Analysis in Web Structure Optimization

    Science.gov (United States)

    Xagi, Mohamad; Guerbas, Abdelghani; Kianmehr, Keivan; Karampelas, Panagiotis; Ridley, Mick; Alhajj, Reda; Rokne, Jon

    The world wide web is growing continuously and rapidly; it is quickly facilitating the migration of tasks of the daily life into web-based. This trend shows time will come when everyone is forced to use the web for daily activities. Naive users arc the major concern of such a shift; so, it is necessary to have the web ready to serve them. We argue that this requires well optimized websites for users to quickly locate the information they arc looking for. This, on the other hand, becomes more and more important due to the widespread reliance on the many services available on the Internet nowadays. It is true that search engines can facilitate the task of finding the information one is looking for. However, search engines will never replace but do complement the optimization of a website's internal structure based on previously recorded user behavior. In this chapter, wc will present a novel approach for identifying problematic structures in websites. This method consists of two phases. The first phase compares user behavior, derived via web log mining techniques, to a combined analysis of the website's link structure obtained by applying three methods leading to more robust framework and hence strong and consistent outcome: (1) constructing and analyzing a social network of the pages constituting the website by considering both the structure and the usage information; (2) applying the Weighted PageRank algorithm; and (3) applying the Hypertext Induced Topic Selection (HITS) method. In the second phase, we use the term frequency-inverse document frequency (TFIDF) measure to investigate further the correlation between the page that contains the link and the linked to pages in order to further support the findings of the first phase of our approach. We will then show how to use these intermediate results in order to point out problematic website structures to the website owner.

  6. Constructing Edge-Colored Graph for Heterogeneous Networks

    Institute of Scientific and Technical Information of China (English)

    侯睿; 武继刚; 陈亚文; 张海波; 隋秀峰

    2015-01-01

    In order to build a fault-tolerant network, heterogeneous facilities are arranged in the network to prevent homogeneous faults from causing serious damage. This paper uses edge-colored graph to investigate the features of a network topology which is survivable after a set of homogeneous devices malfunction. We propose an approach to designing such networks under arbitrary parameters. We also show that the proposed approach can be used to optimize inter-router connections in network-on-chip to reduce the additional consumption of energy and time delay.

  7. Construction and development of China digital seismological observation network

    Institute of Scientific and Technical Information of China (English)

    LIU Rui-feng; GAO Jing-chun; CHEN Yun-tai; WU Zhong-liang; HUANG Zhi-bin; XU Zhi-guo; SUN Li

    2008-01-01

    The seismological observation system in China has experienced rapid development over the Tenth Five-year Plan period. China Earthquake Administration (CEA) has completed the establishment of China digital seismological observation network. CEA has accomplished analog-to-digital conversion of the existing seismological observation systems and set up a number of new digital seismic stations. This indicates full digitization of seismological ob-servation in China. This paper presents an overview of the scale, layout principle and major functions of the up-dated national digital seismograph network, regional digital seismograph network, and digital seismograph net-work for volcano monitoring and mobile digital seismograph networks in China.

  8. 一种基于变权的物流网络成长模型%A Growth Model of Logistics Network Based on Variable Weight

    Institute of Scientific and Technical Information of China (English)

    周晓; 辛琦

    2014-01-01

    复杂网络理论为研究大规模物流网络提供了理论基础,利用复杂网络理论,构建了一种基于变权的物流网络成长模型。网络的成长通过选择原有物流节点满足新的物流需求,即建立新的连接来实现,节点的选择则以多个指标的变权综合评价结果为依据。多指标的变权综合评价方法考虑了决策者的指标均衡偏好,以此对指标权重进行调整,克服了单一指标评价的局限性和多指标常权综合评价的不科学性。仿真结果表明:该模型能够使物流网络在符合决策者指标均衡偏好的节点获得更大的优先连接概率的规则下成长,并且成长起来的物流网络的节点度分布服从幂律分布。%Complex network theory provides a theoretical basis for the study of large-scale logistics network.In this paper,using the theory of complex network,we have built a growth model of logistics network based on variable weight,in which the network is grown by selecting original nodes to meet the new logistics demand,namely,establishing a new connection between them;and the node selection is based on the results of comprehensive evaluation of multiple index with variable weight. Considered the index equilibrium preference,the method of multiple index comprehensive evaluation based on variable weight can adjust the index weight,and can overcome the limitations of the single index evaluation and the unreasonableness of the multiple index comprehensive evaluation with invariable weights.The simulation result shows that:this model make the logistics network growing under the rule that the nodes meeting index equilibrium preference can obtain greater priority connection probability,and node degree distribution of logistics network follows power-law distribution.

  9. Constructing, conducting and interpreting animal social network analysis.

    Science.gov (United States)

    Farine, Damien R; Whitehead, Hal

    2015-09-01

    1. Animal social networks are descriptions of social structure which, aside from their intrinsic interest for understanding sociality, can have significant bearing across many fields of biology. 2. Network analysis provides a flexible toolbox for testing a broad range of hypotheses, and for describing the social system of species or populations in a quantitative and comparable manner. However, it requires careful consideration of underlying assumptions, in particular differentiating real from observed networks and controlling for inherent biases that are common in social data. 3. We provide a practical guide for using this framework to analyse animal social systems and test hypotheses. First, we discuss key considerations when defining nodes and edges, and when designing methods for collecting data. We discuss different approaches for inferring social networks from these data and displaying them. We then provide an overview of methods for quantifying properties of nodes and networks, as well as for testing hypotheses concerning network structure and network processes. Finally, we provide information about assessing the power and accuracy of an observed network. 4. Alongside this manuscript, we provide appendices containing background information on common programming routines and worked examples of how to perform network analysis using the r programming language. 5. We conclude by discussing some of the major current challenges in social network analysis and interesting future directions. In particular, we highlight the under-exploited potential of experimental manipulations on social networks to address research questions.

  10. 基于RBF神经网络的物流园区选址评价体系研究%Logistics Park Location Evaluation System Based on RBF Neural Network Research

    Institute of Scientific and Technical Information of China (English)

    王蕾

    2014-01-01

    Because of the construction of logistics park in our country is in operation of the site planning and management need to explore in practice ,therefore,this article in view of the logistics park location selection problem ,to build the site selection evaluation system model based on RBF neural network to applied research ,will be for our country's logistics park planning and development provides a new theoretical basis and the overall framework of reference .%由于我国物流园区的建设在选址规划和管理运作方面还需在实际中探索,因此,文中针对物流园区选址问题,构建基于RBF神经网络的选址评价体系模型进行应用研究,将为我国的物流园区规划发展提供了新的理论基础和整体框架参考。

  11. 福建省网上生鲜超市物流配送信息系统构建的研究%Construction of logistics delivery information system of Fujian online fresh food supermarkets

    Institute of Scientific and Technical Information of China (English)

    林贤福

    2012-01-01

    网络技术的不断进步,形成了一个庞大的虚拟性网络社会,深刻改变着消费的购买习惯,社会大部分人群开始使用并逐渐依赖网络购物.本文通过构建福建省网上生鲜超市物流配送信息系统,探索网上生鲜超市经营模式,有利于进一步提升我省传统生鲜超市的竞争力,推动福建电子商务产业链延伸和扩展.%With the development of network technology, a huge fictional network society has been formed. It has profoundly changed the consumers" purchasing habits. Most people begin to use and gradually rely on online shopping. By constructing a fresh supermarket logistics delivery information sys- tem in Fujian Province, this research explores the online supermarket business model. It is not only conducive to further enhance the competitiveness of the traditional fresh food supermarket in the province, but also promotes the Fujian industrial chain extension and expansion of e-commerce.

  12. 区域性公共物流信息平台的构建路径分析%Path for Construction of Regional Logistics Public Information Platform

    Institute of Scientific and Technical Information of China (English)

    邓汝春; 陈广仁

    2012-01-01

    在调研、分析经济区域内的物流发展和信息化,各经济主体的功能需求,明确建设目标和任务的基础上,设计各子系统平台,采用一定的技术方法进行系统集成,并构建起系统安全运行机制,从而建设一个高效、敏捷的区域性公共物流信息平台.%The paper first investigates the relationship between logistics informatization and the development of regional economy, analyzes the functional demand of the various economic agents and achieves a clear view of the objectives and tasks in the construction of the regional logistics public information platform. On such basis, it configures the subsystems of the platform, integrates the systems using certain technical solutions and establishes a safe operation mechanism for the platform.

  13. 浅谈陕西航空物流综合信息平台建设%The Construction of Civil Aviation Logistics Information Platform in Shaanxi

    Institute of Scientific and Technical Information of China (English)

    郁苏炜

    2014-01-01

    Considered the demand of Western Development, the construction of Aviation Logistics information platform is very important. This paper proposes a model of the platform include Architecture, standard, and the function. This platform will provide a stable environment for the development of Civil Aviation Logistics in Shaanxi.%按照国家西部大开发战略部署和“关中-天水经济区发展规划”,结合陕西经济发展和对外开放的需要,通过建设符合国际航空物流数据标准、融合电子口岸、电子商务功能,涵盖物流产业链和物流产业资金链、具备强大数据处理能力的航空物流信息平台体系,进一步提高内陆口岸通关能力,为陕西对外开放和经济社会发展做出贡献。

  14. 军队后勤软件建设成本控制方法研究%Methods for Controlling Construction Costs Military Logistics Software

    Institute of Scientific and Technical Information of China (English)

    周达华; 李昂欣; 刘伟

    2015-01-01

    Based on actual military work, the paper estimated the size of the design and planning from a macro to micro project implementation were discussed. Cost control in the study based on the theory, summarized formed a military logistics software system construction cost control effective methodology.%结合军队实际工作,文章将规模估计从宏观的规划设计和到微观的项目实施进行了论述。在研究成本控制理论基础上,总结形成了对军队后勤软件系统建设成本控制行之有效的一套方法。

  15. Application of Wireless Sensor Networks in Intelligent Logistics%无线传感器网络在智能物流中的设计分析

    Institute of Scientific and Technical Information of China (English)

    江峰

    2013-01-01

      无线传感器网络是信息技术中一种全新的信息获取和处理技术,无线传感网络在基础设施安全、生态环境监控、物流管理、智能交通控制以及工业和军事领域等都具有十分广泛的应用。无线传感器网络在智能物流中的应用能够通过运用节点网络协同感知、处理和传输采集数据以及通过网关接入外部网络等特点,从而能够使人们方便快捷的获取感知区域的行为和信息,以达到提升物流的智能化和信息化的水平。这里具体进行分析无线传感器在智能物流中的设计及应用。%The wireless sensor network, as a new information acquisition and processing technology, is widely applied in infrastructure security, ecological environment surveillance and control, logistics management, intelligent traffic control as well as military and industry fields. Wireless sensor network in the intelligent logistics application, by using node network cooperative perception, processing and transmission of collected data as well as access to external network through the gateway, enables the people to conveniently and quickly obtain the behavior and information of sensing regions, thus to promote the level of logistics intelligence and information. This paper specifically discusses the design and application of wireless sensor in intelligent logistics.

  16. Research on the Reconstruction of Urban and Rural Logistic Networks in the Era of Big Data%大数据时代城乡物流网络重构研究

    Institute of Scientific and Technical Information of China (English)

    陶君成; 潘林; 初叶萍

    2016-01-01

    Accurately understanding the carrier role of urban and rural logistic networks in new economy is of great significance for getting rid of China’s dual structure,realizing the integrated development of both rural and urban areas,and promoting the inclusive growth in both rural and urban areas. From the aspect of real economy,the strategic value of urban and rural logistic networks is:first,to promote the interaction of urban social resources and rural natural resource and realize innovation in resources distribution pattern;second,to guarantee the circulation traceability of original rural products and realize innovation in circulation pattern of fresh products;and third,to promote the corresponding construction of logistic distribution center and related communities and realize path innovation in rural urbanization. The principle and way of thinking in developing urban and rural logistic networks is to realize“sharing”building with the help of big data,establish logistic networks from three different levels,share different resources of nodes and routes,make powerful main players to lead the construction of urban and rural logistic networks,as so on.%正确认识城乡物流网络的新经济载体作用,对破除我国城乡二元结构、实现城乡一体化发展、促进城乡包容性增长具有非常重要的意义。从实体经济视角看,城乡物流网络的战略价值在于,推进城市社会资源与农村自然资源的交互激活,实现资源配置方式创新;保障农村原生产品流通溯源,实现生鲜流通方式创新;契合物流集散地与城镇所在地社区建设,实现农村城镇化建设路径创新。而发展城乡物流网络的原则和思路是利用大数据共享式重构,倡导建立县、乡镇、村三级物流网点,重点按照新经济流向选择乡、村物流集散地和服务点并优化运输配送网络,实现平台信息共享及资源渠道整合;补齐渠道下沉短板,共

  17. 逆向物流配送网络优化方法研究%Study on Optimization of Reverse Logistics Distribution Networks

    Institute of Scientific and Technical Information of China (English)

    王庆

    2014-01-01

    对逆向物流网络的原理和优化进行深入分析,从企业的效益及核心竞争力出发,结合逆向物流网络的特点,在比较归纳逆向物流一般模型的基础上,提出一种新的物流网络模式,并建立了线性规划模型,结合实际案例分析,对逆向物流网络规划模型的有效性进行验证,为企业解决相关实际问题提供参考。%In this paper, we analyzed in-depth the principle in the optimization of reverse logistics networks, then in connection with the characteristics of the networks and on the basis of a summary and comparison of the generic reverse logistics model, proposed a new logistics network model and the corresponding linear programming model, and at the end, through a case study, verified the effectiveness of the models proposed.

  18. Conference Logistics Management 2013

    CERN Document Server

    Haasis, Hans-Dietrich; Kopfer, Herbert; Kotzab, Herbert; Schönberger, Jörn

    2015-01-01

    This contributed volume contains the collected research papers presented at the Logistik-Management-Konferenz 2013 organized by the VHB Wissenschaftliche Kommission Logistik, held in Bremen 2013. The papers reflect the current state-of-the-art in logistics and supply chain management, focusing on environmental sustainability in logistics and supply chain network dynamics and control. The target audience primarily comprises research experts in the field as well as practitioners but the book may also be beneficial for graduate students.

  19. Dynamic Innovation strategies and stable networks in the construction industry

    DEFF Research Database (Denmark)

    Andersen, Poul Houman; Cook, Nicole; Marceau, Jane

    2004-01-01

    This paper investigate the role of interorganisational networking for technology diffusion in an industry characterized by very limited R&D activity. Udgivelsesdato: APR......This paper investigate the role of interorganisational networking for technology diffusion in an industry characterized by very limited R&D activity. Udgivelsesdato: APR...

  20. Dynamic Innovation strategies and stable networks in the construction industry

    DEFF Research Database (Denmark)

    Andersen, Poul Houman; Cook, Nicole; Marceau, Jane

    2004-01-01

    This paper investigate the role of interorganisational networking for technology diffusion in an industry characterized by very limited R&D activity. Udgivelsesdato: APR......This paper investigate the role of interorganisational networking for technology diffusion in an industry characterized by very limited R&D activity. Udgivelsesdato: APR...

  1. Computational Logistics

    DEFF Research Database (Denmark)

    Pacino, Dario; Voss, Stefan; Jensen, Rune Møller

    2013-01-01

    This book constitutes the refereed proceedings of the 4th International Conference on Computational Logistics, ICCL 2013, held in Copenhagen, Denmark, in September 2013. The 19 papers presented in this volume were carefully reviewed and selected for inclusion in the book. They are organized...... in topical sections named: maritime shipping, road transport, vehicle routing problems, aviation applications, and logistics and supply chain management....

  2. Computational Logistics

    DEFF Research Database (Denmark)

    This book constitutes the refereed proceedings of the 4th International Conference on Computational Logistics, ICCL 2013, held in Copenhagen, Denmark, in September 2013. The 19 papers presented in this volume were carefully reviewed and selected for inclusion in the book. They are organized...... in topical sections named: maritime shipping, road transport, vehicle routing problems, aviation applications, and logistics and supply chain management....

  3. Reverse logistics

    NARCIS (Netherlands)

    M.P. de Brito (Marisa); S.D.P. Flapper; R. Dekker (Rommert)

    2002-01-01

    textabstractThis paper gives an overview of scientific literature that describes and discusses cases of reverse logistics activities in practice. Over sixty case studies are considered. Based on these studies we are able to indicate critical factors for the practice of reverse logistics. In addi

  4. Study on Return Reverse Logistics of Network Transactions%网络交易中退货逆向物流管理研究

    Institute of Scientific and Technical Information of China (English)

    赵淑红

    2015-01-01

    The increasingly high goods return rate makes more and more enterprises realize the importance of return reverse logistics management.The reason for highly goods return rate on network transactions caused by businesses,consumers, online shopping platform and logistics distribution is analyzed,and the forward logistics together with reverse logistics structure under network environment are researched.Access control to goods return is much more important.The reverse logistics processing center of return goods and information processing center is presented to improve the speed and efficiency of returned goods processing.%居高不下的退货率使得越来越多的企业意识到退货逆向物流管理的重要性。文中从网络交易中涉及到的网络交易商家、消费者、网络购物平台以及物流配送四个方面分析了网络销售高退货率的原因;对电子商务环境下正向物流和退货逆向物流网络结构进行分析;指出加强退货逆向物流管理应从退货逆向物流入口控制,通过建立退货逆向物流中心和加强退货逆向物流信息管理等措施提高退货逆向物流的处理速度和效率。

  5. Study on Network System Construction of Forest Ecological in Huaining New Town

    Institute of Scientific and Technical Information of China (English)

    HUANGQingfeng; WUZemin; WANGJianan; HUANGChenglin; LIBao; QIANNimiao

    2004-01-01

    Urban forest is an important composition and the window and soul of modern cities, which has a close relationship with ecological environment and investing environment. So urban forest has been constructed in China. Huaining County could hold of the historical opportunity and come up with the great blueprint of forest ecological network system construction for the new town. This paper mainly introduces the guiding ideas, principles, goals and overall layouts of the construction in the new town, and hope that it will be a model for other county-level forest ecological network system construction in China.

  6. 区域性国际物流综合服务平台构建研究%Study On Constructing the Internationally-faced Regional Logistics Integrated Service Platform

    Institute of Scientific and Technical Information of China (English)

    王成林; 蒲锋; 田雪; 杨丽; 王克金

    2011-01-01

    The paper first analyzes the background characteristics of international logistics operations and concludes on the attributes of the international logistics agents. Then it briefly overviews the current status of the construction of international logistics service platforms, on the basis of which, requirements on the construction of the internationally-faced regional logistics integrated service platform are analyzed and the service mode of such platform is proposed.%分析了国际物流的背景特征,得出了国际物流参与主体属性,并对国际物流服务平台建设现状进行了简要分析,在此基础上分析了区域性国际物流综合服务平台构建的构建需求,提出了区域性国际物流综合服务平台的服务模式.

  7. OSMnx: New Methods for Acquiring, Constructing, Analyzing, and Visualizing Complex Street Networks

    CERN Document Server

    Boeing, Geoff

    2016-01-01

    Scholars have studied street networks in many ways. However, there are some limitations to the current urban planning/street network analysis literature. To address these challenges, this study presents a new tool to make the collection of data and creation and analysis of street networks simple, consistent, and automatable. OSMnx is a new Python package that downloads administrative boundary shapes and street networks from OpenStreetMap. OSMnx contributes five significant new capabilities for researchers and city planners: first, the automatic downloading of administrative place boundaries and shapefiles; second, the tailored and automated downloading and constructing of street networks from OpenStreetMap (including driving, walking, biking, etc.); third, the automated correction and simplification of network topology; fourth, the ability to save street networks to disk as shapefiles, GraphML, or SVG files; and fifth, the ability to analyze street networks, calculate routes, project and visualize the network...

  8. 基于云计算的物流园区信息服务平台构建研究%Construction Research of Logistics Park Information Service Platform Based on Cloud Computing

    Institute of Scientific and Technical Information of China (English)

    陈翠萍; 黄章树; 李宝玉

    2015-01-01

    The construction of logistics park information service platform for the logistics park is of great significance in these areas:the integration of logistics resources, improve the level of logistics information, improve the operating efficiency of logistics,reduce logistics costs and so on.This paper first introduces the concept of cloud computing,analyzes the demand and the orientation of logistics park information service platform,then constructs the logistics park information service platform based on cloud computing,and describes each module function and the key technology of platform construction.This can provide some reference value for the enterprises and units engaged in the research of the domestic logistics park informatization.%物流园区信息服务平台的建设对物流园区在整合物流资源、提高物流信息化水平、提升物流作业效率以及降低物流成本等方面都有着重要作用。文中首先引入了云计算概念,分析了物流园区信息服务平台的需求以及平台的定位,规划和构建了基于云计算的物流园区信息服务平台,并阐述了各模块功能设计和平台构建的关键技术。此可为从事国内物流园区信息化研究的企业和单位提供一些参考价值。

  9. Constructing ecological interaction networks by correlation analysis: hints from community sampling

    Directory of Open Access Journals (Sweden)

    WenJun Zhang

    2011-09-01

    Full Text Available A set of methodology for constructing ecological interaction networks by correlation analysis of community sampling data was presented in this study. Nearly 30 data sets at different levels of taxa for different sampling seasons and locations were used to construct networks and find network properties. I defined the network constructed by Pearson linear correlation is the linear network, and the network constructed by quasi-linear correlation measure (e.g., Spearman correlation is the quasi-linear network. Two taxa with statistically significant linear or quasi-linear correlation are determined to interact. The quasi-linear network is more general than linear network.The results reveled that correlation distributions of Pearson linear correlation and partial linear correlation constructed networks are unimodal functions and most of them are short-head (mostly negative correlations and long-tailed (mostly positive correlations. Spearman correlation distributions are either long-head and short-tailed unimodal functions or monotonically increasing functions. It was found that both mean partial linear correlation and mean Pearson linear correlation were approximately 0. The proportion of positive (partial linear correlations declined significantly with the increase in taxa. The mean (partial linear correlation declined significantly with the increase of taxa. More than 90% of network interactions are positive interactions. The average connectance was 9.8% (9.3% for (partial linear correlation constructed network. The parameter λ in power low distribution (L(x=x-λ increased as the decline of taxon level (from functional group to species for the partial linear correlation constructed network. λ is in average 0.8 to 0.9. The number of (positive interactions increased with the number of taxa for both linear and partial linear correlations constructed networks. The addition of a taxon would result in an increase of 0.4 (0.3 interactions (positive

  10. An Algorithmic Perspective on Some Network Design, Construction and Analysis Problems

    CERN Document Server

    Andreica, Mugurel Ionut; Andreica, Romulus; Andreica, Angela

    2009-01-01

    Efficient network design, construction and analysis are important topics, considering the highly dynamic environment in which data communication occurs nowadays. In this paper we address several problems concerning these topics from an algorithmic point of view.

  11. Study on Strategy for Constructing Chang-Zhu-Tan Urban Green Logistics System%构建长株潭城市绿色物流体系策略研究

    Institute of Scientific and Technical Information of China (English)

    王阳军; 周建; 芦娟

    2012-01-01

    分析了绿色物流的内涵,在充分探究长株谭区域物流业需求特征的基础上,结合长株潭地区绿色物流产业需求特征,提出了建设长株潭城市绿色物流体系的策略和建议.%The paper analyzes the intension of green logistics and, in connection with the demand characteristics of the green logistics industry of the Chang-Zhu-Tan region, proposes the strategy and suggestions for construction the green logistics system of the region.

  12. A Study on the Strategies of Informationization Construction for the Third-party Logistics Enterprises%第三方物流企业信息化建没的策略研究

    Institute of Scientific and Technical Information of China (English)

    黄宁

    2009-01-01

    The third-party logistics has become the development trend of social division of labor and the modern logistics, while the informatonization construction is helpful for improving the operation efficiency of modem logistics cost per unit. Therefore, it requires the third-party logistics enterprises to carry out informationization construction. The article analyzes the status quo of informationization of China's third-party logistics enterprises, and researches on the strategies of information-ization construction for them to guide logistics enterprises to implement informationization scientifically and reasonably.%第三方物流已经成为社会化分工和现代物流发展的方向,而信息化建设有助于提高现代物流单位成本的运作效率,这就迫切要求第三方物流企业进行信息化建设.文章分析了我国第三方物流企业信息化的现状,并对当前我国第三方物流企业信息化建设策略进行研究,以指导物流企业科学、合理地实施信息化.

  13. On the Brand Construction Strategy of the Third Party Logistics Enterprise Based on the Customer Competition%基于客户竞争的第三方物流企业品牌建设策略研究

    Institute of Scientific and Technical Information of China (English)

    王冬

    2014-01-01

    The satisfaction degree of the logistics customers is the center of the enterprise profit, and trying to build customer competitiveness is indispensable work of the brand construction of each logistics enterprise. Aimed at the status that the third party logistics enterprises don't pay attention to the brand construction, the reality value of the 4C marketing combination on logistics enterprise brand construction should be realized, and the following strategies should be taken: make clear of the brand concept of the enterprise;improve the logistics service quality;maintain the logistics enterprise's brand image, and innovate and develop the brand strategy.%物流客户的满意度是企业利润的中心,倾力打造客户竞争力是每个物流企业品牌建设不可或缺的工作。针对第三方物流企业不重视品牌建设的现状,应发挥4C营销组合对物流企业品牌建设的现实价值,采取以下策略:明确本企业品牌理念;提升物流服务质量;维护物流企业品牌形象,创新发展品牌战略。

  14. Construction of tunable radial basis function networks using orthogonal forward selection.

    Science.gov (United States)

    Chen, Sheng; Hong, Xia; Luk, Bing L; Harris, Chris J

    2009-04-01

    An orthogonal forward selection (OFS) algorithm based on leave-one-out (LOO) criteria is proposed for the construction of radial basis function (RBF) networks with tunable nodes. Each stage of the construction process determines an RBF node, namely, its center vector and diagonal covariance matrix, by minimizing the LOO statistics. For regression application, the LOO criterion is chosen to be the LOO mean-square error, while the LOO misclassification rate is adopted in two-class classification application. This OFS-LOO algorithm is computationally efficient, and it is capable of constructing parsimonious RBF networks that generalize well. Moreover, the proposed algorithm is fully automatic, and the user does not need to specify a termination criterion for the construction process. The effectiveness of the proposed RBF network construction procedure is demonstrated using examples taken from both regression and classification applications.

  15. 基于信息网络的物流供应链管理模式研究%Logistics Supply Chain Management Mode Based on Information Network

    Institute of Scientific and Technical Information of China (English)

    王新桥

    2014-01-01

    Logistics supply # as the central part of the supply chain,its important influence in the competition of the market become self-evident.The paper mainly analyzes the concept of logistics supply chain management and its significance, and the main problems exist in the logistics supply chain management,and put forward the targeted logistics supply chain management mode based on information network.%物流供应作为供应链中的中心环节,它对于市场竞争的重要影响变得不言而喻。文中主要分析了物流供应链管理概念及其意义,企业物流供应链管理中存在的主要问题,并有针对性的提出了基于信息网络的物流供应链管理模式。

  16. Logistic regression and artificial neural network models for mapping of regional-scale landslide susceptibility in volcanic mountains of West Java (Indonesia)

    Science.gov (United States)

    Ngadisih, Bhandary, Netra P.; Yatabe, Ryuichi; Dahal, Ranjan K.

    2016-05-01

    West Java Province is the most landslide risky area in Indonesia owing to extreme geo-morphological conditions, climatic conditions and densely populated settlements with immense completed and ongoing development activities. So, a landslide susceptibility map at regional scale in this province is a fundamental tool for risk management and land-use planning. Logistic regression and Artificial Neural Network (ANN) models are the most frequently used tools for landslide susceptibility assessment, mainly because they are capable of handling the nature of landslide data. The main objective of this study is to apply logistic regression and ANN models and compare their performance for landslide susceptibility mapping in volcanic mountains of West Java Province. In addition, the model application is proposed to identify the most contributing factors to landslide events in the study area. The spatial database built in GIS platform consists of landslide inventory, four topographical parameters (slope, aspect, relief, distance to river), three geological parameters (distance to volcano crater, distance to thrust and fault, geological formation), and two anthropogenic parameters (distance to road, land use). The logistic regression model in this study revealed that slope, geological formations, distance to road and distance to volcano are the most influential factors of landslide events while, the ANN model revealed that distance to volcano crater, geological formation, distance to road, and land-use are the most important causal factors of landslides in the study area. Moreover, an evaluation of the model showed that the ANN model has a higher accuracy than the logistic regression model.

  17. Performance Evaluation for Coal Logistics Transportation Network%煤炭物流运输网络绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    管小俊

    2011-01-01

    After reviewing the current status of researches on coal logistics network system and coal logistics performance evaluation both at home and abroad, the paper establishes an performance evaluation indicator system for coal logistics transportation networks, proposes an AHP and fuzzy comprehensive evaluation based evaluation method, and finally formulates an evaluation model which is applied to the evaluation and comment of a specific nunerical example.%结合国内外对煤炭物流运输网络和物流绩效评价的研究现状,根据评价体系的设计思路,建立了煤炭物流运输网络绩效评价指标体系,提出了一种基于AHP和模糊综合评价法的煤炭物流运输网络绩效评价方法,最后结合了具体的算例进行评价和结论分析.

  18. Digging into construction: social networks and their potential impact on knowledge transfer.

    Science.gov (United States)

    Carlan, N A; Kramer, D M; Bigelow, P; Wells, R; Garritano, E; Vi, P

    2012-01-01

    A six-year study is exploring the most effective ways to disseminate ideas to reduce musculoskeletal disorders (MSDs) in the construction sector. The sector was targeted because MSDs account for 35% of all lost time injuries. This paper reports on the organization of the construction sector, and maps potential pathways of communication, including social networks, to set the stage for future dissemination. The managers, health and safety specialists, union health and safety representatives, and 28 workers from small, medium and large construction companies participated. Over a three-year period, data were collected from 47 qualitative interviews. Questions were guided by the PARIHS (Promoting Action on Research Implementation in Health Services) knowledge-transfer conceptual framework and adapted for the construction sector. The construction sector is a complex and dynamic sector, with non-linear reporting relationships, and divided and diluted responsibilities. Four networks were identified that can potentially facilitate the dissemination of new knowledge: worksite-project networks; union networks; apprenticeship program networks; and networks established by the Construction Safety Association/Infrastructure Health and Safety Association. Flexible and multi-directional lines of communication must be used in this complex environment. This has implications for the future choice of knowledge transfer strategies.

  19. Comparisons of topological properties in autism for the brain network construction methods

    Science.gov (United States)

    Lee, Min-Hee; Kim, Dong Youn; Lee, Sang Hyeon; Kim, Jin Uk; Chung, Moo K.

    2015-03-01

    Structural brain networks can be constructed from the white matter fiber tractography of diffusion tensor imaging (DTI), and the structural characteristics of the brain can be analyzed from its networks. When brain networks are constructed by the parcellation method, their network structures change according to the parcellation scale selection and arbitrary thresholding. To overcome these issues, we modified the Ɛ -neighbor construction method proposed by Chung et al. (2011). The purpose of this study was to construct brain networks for 14 control subjects and 16 subjects with autism using both the parcellation and the Ɛ-neighbor construction method and to compare their topological properties between two methods. As the number of nodes increased, connectedness decreased in the parcellation method. However in the Ɛ-neighbor construction method, connectedness remained at a high level even with the rising number of nodes. In addition, statistical analysis for the parcellation method showed significant difference only in the path length. However, statistical analysis for the Ɛ-neighbor construction method showed significant difference with the path length, the degree and the density.

  20. Influence of the time scale on the construction of financial networks.

    Directory of Open Access Journals (Sweden)

    Frank Emmert-Streib

    Full Text Available BACKGROUND: In this paper we investigate the definition and formation of financial networks. Specifically, we study the influence of the time scale on their construction. METHODOLOGY/PRINCIPAL FINDINGS: For our analysis we use correlation-based networks obtained from the daily closing prices of stock market data. More precisely, we use the stocks that currently comprise the Dow Jones Industrial Average (DJIA and estimate financial networks where nodes correspond to stocks and edges correspond to none vanishing correlation coefficients. That means only if a correlation coefficient is statistically significant different from zero, we include an edge in the network. This construction procedure results in unweighted, undirected networks. By separating the time series of stock prices in non-overlapping intervals, we obtain one network per interval. The length of these intervals corresponds to the time scale of the data, whose influence on the construction of the networks will be studied in this paper. CONCLUSIONS/SIGNIFICANCE: Numerical analysis of four different measures in dependence on the time scale for the construction of networks allows us to gain insights about the intrinsic time scale of the stock market with respect to a meaningful graph-theoretical analysis.

  1. The Networked Student Model for Construction of Personal Learning Environments: Balancing Teacher Control and Student Autonomy

    Science.gov (United States)

    Drexler, Wendy

    2010-01-01

    Principles of networked learning, constructivism, and connectivism inform the design of a test case through which secondary students construct personal learning environments for the purpose of independent inquiry. Emerging web applications and open educational resources are integrated to support a "Networked Student Model" that promotes…

  2. The construction of multimedia teaching resource base based on campus network

    Science.gov (United States)

    Yuan, Bin

    2017-03-01

    Multimedia teaching is the important embodiment of modern education, is an important approach to improve the quality of teaching. In the current environment, campus network construction and application of multimedia teaching resource must be combined with school practice, explore the resources integration of multimedia technology in the campus network environment, in order to realize the long-term development of higher education.

  3. Influence of the time scale on the construction of financial networks.

    Science.gov (United States)

    Emmert-Streib, Frank; Dehmer, Matthias

    2010-09-30

    In this paper we investigate the definition and formation of financial networks. Specifically, we study the influence of the time scale on their construction. For our analysis we use correlation-based networks obtained from the daily closing prices of stock market data. More precisely, we use the stocks that currently comprise the Dow Jones Industrial Average (DJIA) and estimate financial networks where nodes correspond to stocks and edges correspond to none vanishing correlation coefficients. That means only if a correlation coefficient is statistically significant different from zero, we include an edge in the network. This construction procedure results in unweighted, undirected networks. By separating the time series of stock prices in non-overlapping intervals, we obtain one network per interval. The length of these intervals corresponds to the time scale of the data, whose influence on the construction of the networks will be studied in this paper. Numerical analysis of four different measures in dependence on the time scale for the construction of networks allows us to gain insights about the intrinsic time scale of the stock market with respect to a meaningful graph-theoretical analysis.

  4. The Networked Student Model for Construction of Personal Learning Environments: Balancing Teacher Control and Student Autonomy

    Science.gov (United States)

    Drexler, Wendy

    2010-01-01

    Principles of networked learning, constructivism, and connectivism inform the design of a test case through which secondary students construct personal learning environments for the purpose of independent inquiry. Emerging web applications and open educational resources are integrated to support a "Networked Student Model" that promotes…

  5. Constructing Social Networks from Unstructured Group Dialog in Virtual Worlds

    Science.gov (United States)

    Shah, Fahad; Sukthankar, Gita

    Virtual worlds and massively multi-player online games are rich sources of information about large-scale teams and groups, offering the tantalizing possibility of harvesting data about group formation, social networks, and network evolution. However these environments lack many of the cues that facilitate natural language processing in other conversational settings and different types of social media. Public chat data often features players who speak simultaneously, use jargon and emoticons, and only erratically adhere to conversational norms. In this paper, we present techniques for inferring the existence of social links from unstructured conversational data collected from groups of participants in the Second Life virtual world. We present an algorithm for addressing this problem, Shallow Semantic Temporal Overlap (SSTO), that combines temporal and language information to create directional links between participants, and a second approach that relies on temporal overlap alone to create undirected links between participants. Relying on temporal overlap is noisy, resulting in a low precision and networks with many extraneous links. In this paper, we demonstrate that we can ameliorate this problem by using network modularity optimization to perform community detection in the noisy networks and severing cross-community links. Although using the content of the communications still results in the best performance, community detection is effective as a noise reduction technique for eliminating the extra links created by temporal overlap alone.

  6. ANAT: a tool for constructing and analyzing functional protein networks.

    Science.gov (United States)

    Yosef, Nir; Zalckvar, Einat; Rubinstein, Assaf D; Homilius, Max; Atias, Nir; Vardi, Liram; Berman, Igor; Zur, Hadas; Kimchi, Adi; Ruppin, Eytan; Sharan, Roded

    2011-10-25

    Genome-scale screening studies are gradually accumulating a wealth of data on the putative involvement of hundreds of genes in various cellular responses or functions. A fundamental challenge is to chart the molecular pathways that underlie these systems. ANAT is an interactive software tool, implemented as a Cytoscape plug-in, for elucidating functional networks of proteins. It encompasses a number of network inference algorithms and provides access to networks of physical associations in several organisms. In contrast to existing software tools, ANAT can be used to infer subnetworks that connect hundreds of proteins to each other or to a given set of "anchor" proteins, a fundamental step in reconstructing cellular subnetworks. The interactive component of ANAT provides an array of tools for evaluating and exploring the resulting subnetwork models and for iteratively refining them. We demonstrate the utility of ANAT by studying the crosstalk between the autophagic and apoptotic cell death modules in humans, using a network of physical interactions. Relative to published software tools, ANAT is more accurate and provides more features for comprehensive network analysis. The latest version of the software is available at http://www.cs.tau.ac.il/~bnet/ANAT_SI.

  7. Quantum Google Algorithm: Construction and Application to Complex Networks

    CERN Document Server

    Paparo, G D; Comellas, F; Martin-Delgado, M A

    2014-01-01

    We review the main findings on the ranking capabilities of the recently proposed Quantum PageRank algorithm (G.D. Paparo et al., Sci. Rep. 2, 444 (2012) and G.D. Paparo et al., Sci. Rep. 3, 2773 (2013)) applied to large complex networks. The algorithm has been shown to identify unambiguously the underlying topology of the network and to be capable of clearly highlighting the structure of secondary hubs of networks. Furthermore, it can resolve the degeneracy in importance of the low-lying part of the list of rankings. Examples of applications include real-world instances from the WWW, which typically display a scale-free network structure and models of hierarchical networks. The quantum algorithm has been shown to display an increased stability with respect to a variation of the damping parameter, present in the Google algorithm, and a more clearly pronounced power-law behaviour in the distribution of importance among the nodes, as compared to the classical algorithm.

  8. Logistical Worlds

    Directory of Open Access Journals (Sweden)

    Ned Rossiter

    2014-03-01

    Full Text Available As the managerial art and science of coordinating the movement of people, finance and things, logistical operations are central to contemporary capital. Despite its materiality in the form of communications and transport infrastructure, logistics remains an abstract machine for many. This is largely due to the compartmental structure of global supply chains and the invisibility of code. In registering the mediating force of logistics, the essay considers parametric politics as an architecture of intervention for both game design and software development. There are implications here not only for gameplay, but also the invention of method and governance of labour. How, for instance, might game design facilitate the production of a political knowledge of logistics? This becomes a matter to address for labour power vis-à-vis collective research on infrastructure, software and global supply chains.

  9. Construction of Network Fault Simulation Platform and Event Samples Acquisition Techniques for Event Correlation

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Event correlation is one key technique in network fault management. For the event sample acqui sition problem in event correlation, a novel approach is proposed to collect the samples by constructing net work simtmulation platform. The platform designed can set kinds of network faults according to user's demand and generate a lot of network fault events, which will benefit the research on efficient event correlation tech niques.

  10. An Instruction Language for Self-Construction in the Context of Neural Networks

    OpenAIRE

    Frederic eZubler; Andreas eHauri; Sabina ePfister; Whatley, Adrian M; Matthew eCook; Rodney eDouglas

    2011-01-01

    Biological systems are based on an entirely different concept of construction than human artifacts. They construct themselves by a process of self-organization that is a systematic spatio-temporal generation of, and interaction between, various specialized cell types. We propose a framework for designing gene-like codes for guiding the self-construction of neural networks. The description of neural development is formalized by defining a set of primitive actions taken locally by neural precur...

  11. Análise do lead time nos processos logísticos de uma rede varejista de flores/Analysis of the lead time in the logistics processes of a retail flower network

    National Research Council Canada - National Science Library

    Luciana Torres Correia de Mello; Hugo Carlos Mansano Dornfeld; Givaldo Guilherme dos Santos; Débora Passos; Rafael Ribeiro; Moacir Godinho Filho

    2016-01-01

    .... The aim of this study was to analyze the lead time of logistics processes of a flower retailer network with headquarters in Campinas/SP using the tool Manufacturing Critical-path Time of the Quick...

  12. Construction of a new adaptive wavelet network and its learning algorithm

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A new adaptive learning algorithm for constructing and training wavelet networks is proposed based on the time-frequency localization properties of wavelet frames and the adaptive projection algorithm. The exponential convergence of the adaptive projection algorithm in finite-dimensional Hilbert spaces is constructively proved, with exponential decay ratios given with high accuracy. The learning algorithm can sufficiently utilize the time-frequency information contained in the training data, iteratively determines the number of the hidden layer nodes and the weights of wavelet networks, and solves the problem of structure optimization of wavelet networks. The algorithm is simple and efficient, as illustrated by examples of signal representation and denoising.

  13. Constructing and Classifying Email Networks from Raw Forensic Images

    Science.gov (United States)

    2016-09-01

    Washington DC 20503. 1. AGENCY USE ONLY (Leave Blank) 2. REPORT DATE September 2016 3. REPORT TYPE AND DATES COVERED Master’s Thesis 09-01-2014 to 09-17...main difference was the computation time. For example, on a 1275-node jazz musician network, the fast algorithm ran to completion in about one

  14. Polynomial Time Algorithms for Multicast Network Code Construction

    NARCIS (Netherlands)

    Jaggi, S.; Sanders, P.; Chou, P.A.; Effros, M.; Egner, S.; Jain, K.; Tolhuizen, L.M.G.

    2005-01-01

    The famous max-flow min-cut theorem states that a source node can send information through a network ( ) to a sink node at a rate determined by the min-cut separating and . Recently, it has been shown that this rate can also be achieved for multicasting to several sinks provided that the

  15. A GIS analysis of suitability for construction aggregate recycling sites using regional transportation network and population density features

    Science.gov (United States)

    Robinson, G.R.; Kapo, K.E.

    2004-01-01

    Aggregate is used in road and building construction to provide bulk, strength, support, and wear resistance. Reclaimed asphalt pavement (RAP) and reclaimed Portland cement concrete (RPCC) are abundant and available sources of recycled aggregate. In this paper, current aggregate production operations in Virginia, Maryland, and the District of Columbia are used to develop spatial association models for the recycled aggregate industry with regional transportation network and population density features. The cost of construction aggregate to the end user is strongly influenced by the cost of transporting processed aggregate from the production site to the construction site. More than 60% of operations recycling aggregate in the mid-Atlantic study area are located within 4.8 km (3 miles) of an interstate highway. Transportation corridors provide both sites of likely road construction where aggregate is used and an efficient means to move both materials and on-site processing equipment back and forth from various work sites to the recycling operations. Urban and developing areas provide a high market demand for aggregate and a ready source of construction debris that may be processed into recycled aggregate. Most aggregate recycling operators in the study area are sited in counties with population densities exceeding 77 people/km2 (200 people/mile 2). No aggregate recycling operations are sited in counties with less than 19 people/km2 (50 people/mile2), reflecting the lack of sufficient long-term sources of construction debris to be used as an aggregate source, as well as the lack of a sufficient market demand for aggregate in most rural areas to locate a recycling operation there or justify the required investment in the equipment to process and produce recycled aggregate. Weights of evidence analyses (WofE), measuring correlation on an area-normalized basis, and weighted logistic regression (WLR), are used to model the distribution of RAP and RPCC operations relative

  16. Interactive Naive Bayesian network: A new approach of constructing gene-gene interaction network for cancer classification.

    Science.gov (United States)

    Tian, Xue W; Lim, Joon S

    2015-01-01

    Naive Bayesian (NB) network classifier is a simple and well-known type of classifier, which can be easily induced from a DNA microarray data set. However, a strong conditional independence assumption of NB network sometimes can lead to weak classification performance. In this paper, we propose a new approach of interactive naive Bayesian (INB) network to weaken the conditional independence of NB network and classify cancers using DNA microarray data set. We selected the differently expressed genes (DEGs) to reduce the dimension of the microarray data set. Then, an interactive parent which has the biggest influence among all DEGs is searched for each DEG. And then we calculate a weight to represent the interactive relationship between a DEG and its parent. Finally, the gene-gene interaction network is constructed. We experimentally test the INB network in terms of classification accuracy using leukemia and colon DNA microarray data sets, then we compare it with the NB network. The INB network can get higher classification accuracies than NB network. And INB network can show the gene-gene interactions visually.

  17. A greedy construction heuristic for the liner service network design problem

    DEFF Research Database (Denmark)

    Brouer, Berit Dangaard

    The Liner Service Network Design Problem (LSN-DP) is the problem of constructing a set of routes for a heterogeneous vessel fleet of a global liner shipping operator. Routes in the liner shipping context are non-simple, cyclic routes constructed for a specific vessel type. The problem...... is challenging due to the size of a global liner shipping operation and due to the hub-and-spoke network design, where a high percentage of the total cargo is transshipped. We present the first construction heuristic for large scale instances of the LSN-DP. The heuristic is able to find a solution for a real...

  18. 基于关系数据库的蒙文局部本体构建及整合%Construction of Mongolian Logistics Ontology Based on Relational Database

    Institute of Scientific and Technical Information of China (English)

    苏依拉; 王一云; 谭艳梅

    2014-01-01

    针对网络中存在的大量有价值却未被利用的 Web 信息,通过构建本体对深层的 Web 信息进行描述,从而达到检索、利用和共享的目的。基于对蒙文特点、信息处理面临的难题以及当前的研究成果进行了分析,提出了一种基于关系数据库的蒙文本体自动构建方法,并以内蒙古地区物流数据为例,设计实现了蒙文物流本体的自动构建及推理查询系统。原型系统对所获得的本体进行了实例化,并利用 Jena 推理子系统对所构建本体的一致性及推理能力进行了验证,将基于规则的推理应用到内蒙古物流领域业务决策过程中。%In view of the large number of valuable Web information that has not been used existing in the network, by constructing ontology the deep Web information can be described to achieve the purpose of retrieval and utilization and sharing. Based on the analysis of the Mongolian features, challenges of information processing, and the current research results, this paper proposes an automatically Mongolian ontology building method based on relational database, and designs Mongolian logistics automatically building ontology and reasoning query system taking logistics data in Inner Mongolia as an example. First, the obtained ontology is instantiated by the prototype system, and it is also verified on the help of Jena reasoning subsystem. The consistency and reasoning ability of the obtained Ontology were verified. Finally, this prototype system was applied to the decision-making process in the field of logistics business in Inner Mongolia.

  19. Least-inference methods for constructing networks of trophic flows

    NARCIS (Netherlands)

    Ulanowicz, R.E.; Scharler, U.M.

    2008-01-01

    The construction of material and energy budgets within ecosystems has long been accomplished via manual calculation. Recently, optimization techniques have been adapted to automate the procedure, but these methods require assumptions that may not square with biological reality. Two algorithms are de

  20. Construction of Course Ubiquitous Learning Based on Network

    Science.gov (United States)

    Wang, Xue; Zhang, Wei; Yang, Xinhui

    2017-01-01

    Ubiquitous learning has been more and more recognized, which describes a new generation of learning from a new point of view. Ubiquitous learning will bring the new teaching practice and teaching reform, which will become an essential way of learning in 21st century. Taking translation course as a case study, this research constructed a system of…

  1. Massive-scale gene co-expression network construction and robustness testing using random matrix theory.

    Science.gov (United States)

    Gibson, Scott M; Ficklin, Stephen P; Isaacson, Sven; Luo, Feng; Feltus, Frank A; Smith, Melissa C

    2013-01-01

    The study of gene relationships and their effect on biological function and phenotype is a focal point in systems biology. Gene co-expression networks built using microarray expression profiles are one technique for discovering and interpreting gene relationships. A knowledge-independent thresholding technique, such as Random Matrix Theory (RMT), is useful for identifying meaningful relationships. Highly connected genes in the thresholded network are then grouped into modules that provide insight into their collective functionality. While it has been shown that co-expression networks are biologically relevant, it has not been determined to what extent any given network is functionally robust given perturbations in the input sample set. For such a test, hundreds of networks are needed and hence a tool to rapidly construct these networks. To examine functional robustness of networks with varying input, we enhanced an existing RMT implementation for improved scalability and tested functional robustness of human (Homo sapiens), rice (Oryza sativa) and budding yeast (Saccharomyces cerevisiae). We demonstrate dramatic decrease in network construction time and computational requirements and show that despite some variation in global properties between networks, functional similarity remains high. Moreover, the biological function captured by co-expression networks thresholded by RMT is highly robust.

  2. Massive-scale gene co-expression network construction and robustness testing using random matrix theory.

    Directory of Open Access Journals (Sweden)

    Scott M Gibson

    Full Text Available The study of gene relationships and their effect on biological function and phenotype is a focal point in systems biology. Gene co-expression networks built using microarray expression profiles are one technique for discovering and interpreting gene relationships. A knowledge-independent thresholding technique, such as Random Matrix Theory (RMT, is useful for identifying meaningful relationships. Highly connected genes in the thresholded network are then grouped into modules that provide insight into their collective functionality. While it has been shown that co-expression networks are biologically relevant, it has not been determined to what extent any given network is functionally robust given perturbations in the input sample set. For such a test, hundreds of networks are needed and hence a tool to rapidly construct these networks. To examine functional robustness of networks with varying input, we enhanced an existing RMT implementation for improved scalability and tested functional robustness of human (Homo sapiens, rice (Oryza sativa and budding yeast (Saccharomyces cerevisiae. We demonstrate dramatic decrease in network construction time and computational requirements and show that despite some variation in global properties between networks, functional similarity remains high. Moreover, the biological function captured by co-expression networks thresholded by RMT is highly robust.

  3. Logistic regression.

    Science.gov (United States)

    Nick, Todd G; Campbell, Kathleen M

    2007-01-01

    The Medical Subject Headings (MeSH) thesaurus used by the National Library of Medicine defines logistic regression models as "statistical models which describe the relationship between a qualitative dependent variable (that is, one which can take only certain discrete values, such as the presence or absence of a disease) and an independent variable." Logistic regression models are used to study effects of predictor variables on categorical outcomes and normally the outcome is binary, such as presence or absence of disease (e.g., non-Hodgkin's lymphoma), in which case the model is called a binary logistic model. When there are multiple predictors (e.g., risk factors and treatments) the model is referred to as a multiple or multivariable logistic regression model and is one of the most frequently used statistical model in medical journals. In this chapter, we examine both simple and multiple binary logistic regression models and present related issues, including interaction, categorical predictor variables, continuous predictor variables, and goodness of fit.

  4. Customer-oriented network trade and logistics of firewood; Metsahakkeen ja pilkkeiden asiakaslahtoeinen verkkokauppa ja logistiikka - PUUT34

    Energy Technology Data Exchange (ETDEWEB)

    Tahvanainen, T.; Sikanen, L. [Finnish Forest Research Institute, Helsinki (Finland)

    2005-07-01

    The small-scale use of firewood is the second largest source of wood based energy after industrial residues in Finland. Objectives of this project, funded by European Regional Development Fund via Tekes and Finnish companies, were to develop logistic systems for small scale use of wood fuels and produce information and material for advisors and consults. The small-scale use of wood fuels increases constantly and e-commerce of chopped firewood is developing especially in Eastern Finland. Currently, the most severe bottlenecks are in the integration of production and delivery logistics, availability of raw material, as well as in the non-professional way of working. In the project, technological alternatives of supply chains, cost structures as well as constraints and preconditions for the economically sustainable operations were clarified. Project ended with following results: 'Typical features of North-Karelian firewood entrepreneur', identifying wood fuel resources in forest planning, new biomass models for estimating availability of energy wood in young stands, simulation studies about delivery logistics, cost structure of firewood supply chains and feasibility of integrating firewood transport to other transport services. Also education and training materials were produced for advisory organizations, like Finnish forestry centers. (orig.)

  5. Customer-oriented network trade and logistics of firewood; Metsaehakkeen ja pilkkeiden asiakaslaehtoeinen verkkokauppa ja logistiikka - PUUT34

    Energy Technology Data Exchange (ETDEWEB)

    Tahvanainen, T. [Joensuun Tiedepuisto Oy, Joensuu (Finland); Sikanen, L. [Finnish Forest Research Institute, Joensuu (Finland)

    2007-07-01

    The small-scale use of firewood is the second largest source of wood based energy after industrial residues in Finland. Objectives of this project, funded by European Regional Development Fund via Tekes and Finnish companies, were to develop logistic systems for small scale use of wood fuels and produce information and material for advisors and consults. The small-scale use of wood fuels increases constantly and e-commerce of chopped firewood is developing especially in Eastern Finland. Currently, the most severe bottlenecks are in the integration of production and delivery logistics, availability of raw material, as well as in the non-professional way of working. In the project, technological alternatives of supply chains, cost structures as well as constraints and preconditions for the economically sustainable operations were clarified. Project ended with following results: 'Typical features of North-Karelian firewood entrepreneur', identifying wood fuel resources in forest planning, new biomass models for estimating availability of energy wood in young stands, simulation studies about delivery logistics, cost structure of firewood supply chains and feasibility of integrating firewood transport to other transport services. Also education and training materials were produced for advisory organizations, like Finnish forestry centers. (orig.)

  6. On the Construction of Knowledge-type University Logistic Team under the New Situation%新形势下高校后勤知识型团队建设探析

    Institute of Scientific and Technical Information of China (English)

    赵言秀

    2013-01-01

    A knowledge-type university logistic team helps to enhance the working efficiency and service level of university logistics, and promote the harmonious development of universities. This paper analyzes the current situation of university logistic team construction and the characteristics of the knowledge-type university logistic team, and proposes counter-measures.%高校后勤知识型团队建设能提高后勤工作效率和服务水平,促进高校的和谐发展。本文分析了高校后勤团队建设的现状和高校后勤知识型团队的特征,提出了高校后勤知识型团队建设的对策。

  7. 快递物流网站建设现状及发展对策研究%Study on Current Status and Development Strategy of Construction of Expedited Logistics Sites

    Institute of Scientific and Technical Information of China (English)

    蒋元芳; 曹树国

    2012-01-01

    从快递物流企业的需求入手,对当前物流网站存在的问题进行分析总结,针对物流网站建设和运营过程中存在的问题尤其是技术方面存在的问题,提出了一些改进建议,并对物流网站发展进行了展望.%In this paper, starting from the demand of the expedited logistics enterprises, we analyzed and summarized the problems in current logistics websites, in view of the problems in the construction and operation of logistics websites, the technical problems in particular, proposed several suggestions for improvement, and predicted the development of logistics websites.

  8. Tecnologia da informação e integração das redes logísticas Information technology and logistics network integration

    Directory of Open Access Journals (Sweden)

    Regina Meyer Branski

    2013-06-01

    Full Text Available A integração das atividades logísticas constitui um grande desafio e envolve, além da empresa, seus parceiros externos. As tecnologias de informação têm papel central neste processo, já que fornecem a infraestrutura e os aplicativos que permitem a troca de informação necessária para a integração. O trabalho tem como objetivo apresentar um modelo - baseado nas tecnologias de informação - para análise das fases de integração externa entre operadores e os demais agentes da rede logística. A análise foi construída a partir de um estudo de casos realizado com quatro operadores logísticos com atuação no mercado brasileiro. A pesquisa identificou as tecnologias utilizadas pelos operadores no processo logístico e analisou sua contribuição para o estabelecimento da logística integrada baseando-se em três parâmetros - integração dos fluxos de materiais, produtos e informação; sua coordenação; e o estabelecimento de parcerias entre os agentes. A partir dos elementos levantados na pesquisa, o estudo apontou a existência de três níveis de integração externa entre o operador e os demais agentes da rede: plena, parcial e inexistente. A rede logística constitui uma rede de valor quando há integração plena e o estabelecimento de parcerias entre os operadores e os demais agentes.The integration of logistics activities is a major challenge that involves the company's internal and external partners. Information technology (IT plays a central role in this process since it provides infrastructure and software applications that allow the exchange of information needed to achieve such integration. The aim of this paper is propose a based IT model to analyze the external integration stages between third-party logistics providers (3PL and the other agents of the logistics network. The analysis was based on a multiple case study conducted in four 3PLs operating in Brazil. This research identified and analyzed the technologies

  9. An Examination of the Topology and Measurement of the Alexithymia Construct Using Network Analysis.

    Science.gov (United States)

    Watters, Carolyn A; Taylor, Graeme J; Quilty, Lena C; Bagby, R Michael

    2016-01-01

    There is some ongoing controversy surrounding the definition and measurement of the alexithymia construct. Whereas most researchers describe 4 components comprising the construct (difficulty identifying feelings, difficulty describing feelings, restricted fantasizing, and externally oriented thinking), some include a 5th component, which is defined as "reduced experiencing of emotional feelings." This study examined the topology and measurement of alexithymia using the method of network analysis with data from a heterogeneous multilanguage sample (N = 1,696) that had completed the Bermond-Vorst Alexithymia Questionnaire (BVAQ; Vorst & Bermond, 2001 ). The BVAQ includes an Emotionalizing subscale for assessing the purported 5th component; we compared the network analyses conducted both with and without the Emotionalizing items. The results revealed strong associations between Emotionalizing and Analyzing (externally oriented thinking) items, but Emotionalizing items had almost as many negative as positive connections with items assessing the other components of the construct. A comparison of communities identified by modularity analyses of the 2 networks failed to support emotionalizing as a distinct component of the construct. In addition, network metrics revealed that Fantasizing items were particularly weak within both networks, suggesting that reduced fantasizing might be a peripheral component of the alexithymia construct. Implications for the measurement and treatment of alexithymia are discussed.

  10. Review of pore network modelling of porous media: Experimental characterisations, network constructions and applications to reactive transport

    Science.gov (United States)

    Xiong, Qingrong; Baychev, Todor G.; Jivkov, Andrey P.

    2016-09-01

    Pore network models have been applied widely for simulating a variety of different physical and chemical processes, including phase exchange, non-Newtonian displacement, non-Darcy flow, reactive transport and thermodynamically consistent oil layers. The realism of such modelling, i.e. the credibility of their predictions, depends to a large extent on the quality of the correspondence between the pore space of a given medium and the pore network constructed as its representation. The main experimental techniques for pore space characterisation, including direct imaging, mercury intrusion porosimetry and gas adsorption, are firstly summarised. A review of the main pore network construction techniques is then presented. Particular focus is given on how such constructions are adapted to the data from experimentally characterised pore systems. Current applications of pore network models are considered, with special emphasis on the effects of adsorption, dissolution and precipitation, as well as biomass growth, on transport coefficients. Pore network models are found to be a valuable tool for understanding and predicting meso-scale phenomena, linking single pore processes, where other techniques are more accurate, and the homogenised continuum porous media, used by engineering community.

  11. Construction of tunable supramolecular networks studied by scanning tunneling microscopy

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    In this review we describe a family of organic-based host frameworks which can accommodate guest molecules. The aim of the study is to test the adjustability of this class of mimic structures that may lead to new interesting functions. Emphasis of our research is placed upon four aspects: 1) thermal properties, 2) surface photochemistry, 3) fullerene adsorption, and 4) guest inclusion. It is envisioned that such approach of nanoporous molecular networks might be developed into a new family of useful soft frameworks for studies toward shape-selective catalysis, molecular recognition, self-assembly, and host-guest supramolecular chemistry.

  12. Slowness logistics

    OpenAIRE

    Paché, Gilles

    2007-01-01

    Abstract Works conducted in logistics management mostly emphasize the importance of a `time compression' strategy to develop a sustainable competitive advantage. At the level of the design, manufacturing or distribution of products to consumers, high-speed orientation is now considered to be a universal source of performance. Drawing from current developments in the French food retailing industry, the paper...

  13. Identifying causal networks linking cancer processes and anti-tumor immunity using Bayesian network inference and metagene constructs.

    Science.gov (United States)

    Kaiser, Jacob L; Bland, Cassidy L; Klinke, David J

    2016-03-01

    Cancer arises from a deregulation of both intracellular and intercellular networks that maintain system homeostasis. Identifying the architecture of these networks and how they are changed in cancer is a pre-requisite for designing drugs to restore homeostasis. Since intercellular networks only appear in intact systems, it is difficult to identify how these networks become altered in human cancer using many of the common experimental models. To overcome this, we used the diversity in normal and malignant human tissue samples from the Cancer Genome Atlas (TCGA) database of human breast cancer to identify the topology associated with intercellular networks in vivo. To improve the underlying biological signals, we constructed Bayesian networks using metagene constructs, which represented groups of genes that are concomitantly associated with different immune and cancer states. We also used bootstrap resampling to establish the significance associated with the inferred networks. In short, we found opposing relationships between cell proliferation and epithelial-to-mesenchymal transformation (EMT) with regards to macrophage polarization. These results were consistent across multiple carcinomas in that proliferation was associated with a type 1 cell-mediated anti-tumor immune response and EMT was associated with a pro-tumor anti-inflammatory response. To address the identifiability of these networks from other datasets, we could identify the relationship between EMT and macrophage polarization with fewer samples when the Bayesian network was generated from malignant samples alone. However, the relationship between proliferation and macrophage polarization was identified with fewer samples when the samples were taken from a combination of the normal and malignant samples. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:470-479, 2016.

  14. Geographical networks stochastically constructed by a self-similar tiling according to population

    CERN Document Server

    Hayashi, Yukio

    2010-01-01

    In real communication and transportation networks, the geographical positions of nodes are very important for the efficiency and the tolerance of connectivity. Considering spatially inhomogeneous positions of nodes according to a population, we introduce a multi-scale quartered (MSQ) network that is stochastically constructed by recursive subdivision of polygonal faces as a self-similar tiling. It has several advantages: the robustness of connectivity, the bounded short path lengths, and the shortest distance routing algorithm in a distributive manner. Furthermore, we show that the MSQ network is more efficient with shorter link lengths and more suitable with lower load for avoiding traffic congestion than other geographical networks which have various topologies ranging from river to scale-free networks. These results will be useful for providing an insight into the future design of ad hoc network infrastructures.

  15. Geographical networks stochastically constructed by a self-similar tiling according to population

    Science.gov (United States)

    Hayashi, Yukio; Ono, Yasumasa

    2010-07-01

    In real communication and transportation networks, the geographical positions of nodes are very important for the efficiency and the tolerance of connectivity. Considering spatially inhomogeneous positions of nodes according to a population, we introduce a multiscale quartered (MSQ) network that is stochastically constructed by recursive subdivision of polygonal faces as a self-similar tiling. It has several advantages: the robustness of connectivity, the bounded short path lengths, and the shortest distance routing algorithm in a distributive manner. Furthermore, we show that the MSQ network is more efficient with shorter link lengths and more suitable with lower load for avoiding traffic congestion than other geographical networks which have various topologies ranging from river to scale-free networks. These results will be useful for providing an insight into the future design of ad hoc network infrastructures.

  16. Research on reverse logistics location under uncertainty environment based on grey prediction

    Science.gov (United States)

    Zhenqiang, Bao; Congwei, Zhu; Yuqin, Zhao; Quanke, Pan

    This article constructs reverse logistic network based on uncertain environment, integrates the reverse logistics network and distribution network, and forms a closed network. An optimization model based on cost is established to help intermediate center, manufacturing center and remanufacturing center make location decision. A gray model GM (1, 1) is used to predict the product holdings of the collection points, and then prediction results are carried into the cost optimization model and a solution is got. Finally, an example is given to verify the effectiveness and feasibility of the model.

  17. A Constructive Algorithm for Feedforward Neural Networks for Medical Diagnostic Reasoning

    CERN Document Server

    Siddiquee, Abu Bakar; Kamruzzaman, S M

    2010-01-01

    This research is to search for alternatives to the resolution of complex medical diagnosis where human knowledge should be apprehended in a general fashion. Successful application examples show that human diagnostic capabilities are significantly worse than the neural diagnostic system. Our research describes a constructive neural network algorithm with backpropagation; offer an approach for the incremental construction of nearminimal neural network architectures for pattern classification. The algorithm starts with minimal number of hidden units in the single hidden layer; additional units are added to the hidden layer one at a time to improve the accuracy of the network and to get an optimal size of a neural network. Our algorithm was tested on several benchmarking classification problems including Cancer1, Heart, and Diabetes with good generalization ability.

  18. A project plan for construction and cabling of picture archiving and communication system network

    Institute of Scientific and Technical Information of China (English)

    罗敏; 王小林; 罗松; 雷文勇; 王学健; 温洪宇; 吴红星

    2003-01-01

    Objective To determine a network solution to meet the network requirements of the heavy data flow, load balance, and potential network storms from expansion of picture archiving and communication system (PACS) application.Methods Intel Netstructure 480T Giga Switch was used as the main switch and connected to each building by fiber channel at 1 Giga speed to archive 100 MB/s to each port. At the same time, the in-dependence of the original network construction was physically kept. The layer 3 and 4 switchers were used as load balance to reduce the heavy load of the network, and all the cabling for PACS used the super CAT5 along with the Intel NetStructure 1520 to prepare for potential network storms.Results An advanced intranet was set up to fully meet the high standard requirement of the PACS. The foundation for upgrading the whole network system to 1 Giga application was built to achieve sharing and transmission of images, information, and patient data within the hospital. The base was established for the standardized management of the hospital.Conclusion Good planning is the first step in setting up PACS, and the equipment from the necessary platform to run PACS and all kinds of hospital information system (HIS). The networking construction is the foundation of e-hospital.

  19. A Neural Network Model for Construction Projects Site Overhead Cost Estimating in Egypt

    CERN Document Server

    ElSawy, Ismaail; Razek, Mohammed Abdel

    2011-01-01

    Estimating of the overhead costs of building construction projects is an important task in the management of these projects. The quality of construction management depends heavily on their accurate cost estimation. Construction costs prediction is a very difficult and sophisticated task especially when using manual calculation methods. This paper uses Artificial Neural Network (ANN) approach to develop a parametric cost-estimating model for site overhead cost in Egypt. Fifty-two actual real-life cases of building projects constructed in Egypt during the seven year period 2002-2009 were used as training materials. The neural network architecture is presented for the estimation of the site overhead costs as a percentage from the total project price.

  20. A new method for constructing infinite families of k-tight optimal double loop networks

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    The double loop network (DLN) is a circulant digraph with n nodes and outdegree 2. DLN has been widely used in the designing of local area networks and distributed systems. In this paper, a new method for constructing infinite families of k-tight optimal DLN is presented.method, where the number nk(t,a) of their nodes is a polynomial of degree 2 in t and contains a parameter a. And a conjecture is proposed.

  1. Construction of Haptic Transmission Network for Haptic Broadcasting by Articulated Multilateral Control

    Science.gov (United States)

    Ishii, Takumi; Katsura, Seiichiro

    Recently, haptic broadcasting technology has received considerable attention, and the construction of haptic broadcasting network is desired. In this paper, we propose a method of the construction of haptic transmission networks for haptic broadcasting by articulated multilateral control. The proposed method can be used to realize the following; 1) real-time-controlled haptic transmission between many systems and 2) change in the number of systems without modifying the control systems. As a result, it is possible to receive force feedback from remote environments when many haptic devices are connected to each other. The experimental results prove the feasibility of the proposed method.

  2. Lunar Commercial Mining Logistics

    Science.gov (United States)

    Kistler, Walter P.; Citron, Bob; Taylor, Thomas C.

    2008-01-01

    Innovative commercial logistics is required for supporting lunar resource recovery operations and assisting larger consortiums in lunar mining, base operations, camp consumables and the future commercial sales of propellant over the next 50 years. To assist in lowering overall development costs, ``reuse'' innovation is suggested in reusing modified LTS in-space hardware for use on the moon's surface, developing product lines for recovered gases, regolith construction materials, surface logistics services, and other services as they evolve, (Kistler, Citron and Taylor, 2005) Surface logistics architecture is designed to have sustainable growth over 50 years, financed by private sector partners and capable of cargo transportation in both directions in support of lunar development and resource recovery development. The author's perspective on the importance of logistics is based on five years experience at remote sites on Earth, where remote base supply chain logistics didn't always work, (Taylor, 1975a). The planning and control of the flow of goods and materials to and from the moon's surface may be the most complicated logistics challenges yet to be attempted. Affordability is tied to the innovation and ingenuity used to keep the transportation and surface operations costs as low as practical. Eleven innovations are proposed and discussed by an entrepreneurial commercial space startup team that has had success in introducing commercial space innovation and reducing the cost of space operations in the past. This logistics architecture offers NASA and other exploring nations a commercial alternative for non-essential cargo. Five transportation technologies and eleven surface innovations create the logistics transportation system discussed.

  3. 广州批发市场的供应物流空间格局及其形成机制%Spatial Patterns and Their Formation Mechanism of Supply Logistics Network of Wholesale Markets in Guangzhou

    Institute of Scientific and Technical Information of China (English)

    潘裕娟; 曹小曙

    2012-01-01

    Urban wholesale markets are distribution centers that integrate the information flow, trade flow, and material flow; and their logistics activities belong to the urban logistics activities. Based on the data of an investigation in the wholesale markets of Guangzhou city, this paper examines the spatial patterns of supply logistics network by using social network analysis. Firstly, a 2-mode matrix comprising 19 supplying places and 21 receiving places is constructed, with the visualization of the relationship between places. Some conclusions can be drawn as follows. (1) The allocation of logistics nodes is characterized by surrounding traffic lines, concentrating in inner cities, and distributing to spheres. (2) Most of the goods in wholesale markets come from districts outside Guangzhou city, especially from foreign countries, other provinces, other parts of the Pearl River Delta, and northern Guangdong Province. (3) The 21 receiving places vary greatly in goods quantities, and form a reversed y-shaped pattern in the city. Secondly, applying the centrality analysis of the logistics network through measuring the indicators of degree centrality, closeness centrality and betweenness centrality, the core-edge places of the network are identified. Results indicate that the Pearl River Delta, other provinces and Baiyun District are the core supplying places, the wholesale markets of Liuhua and Zhongda are core receiving places; while Nansha District and Huangpu Maogang wholesale market are the edge places in the network. Finally, this paper discusses the formation mechanism of the spatial patterns in four aspects: the city character, the urban spatial disparity, the industrial cluster, and the logistics service. In brief, by analyzing the spatial patterns and their formation mechanism of supply logistics network of wholesale markets in Guangzhou, this paper is expected to provide helpful reference for the future optimization of the urban logistics space.%城市批发市

  4. Immigrant maternal depression and social networks. A multilevel Bayesian spatial logistic regression in South Western Sydney, Australia.

    Science.gov (United States)

    Eastwood, John G; Jalaludin, Bin B; Kemp, Lynn A; Phung, Hai N; Barnett, Bryanne E W

    2013-09-01

    The purpose is to explore the multilevel spatial distribution of depressive symptoms among migrant mothers in South Western Sydney and to identify any group level associations that could inform subsequent theory building and local public health interventions. Migrant mothers (n=7256) delivering in 2002 and 2003 were assessed at 2-3 weeks after delivery for risk factors for depressive symptoms. The binary outcome variables were Edinburgh Postnatal Depression Scale scores (EPDS) of >9 and >12. Individual level variables included were: financial income, self-reported maternal health, social support network, emotional support, practical support, baby trouble sleeping, baby demanding and baby not content. The group level variable reported here is aggregated social support networks. We used Bayesian hierarchical multilevel spatial modelling with conditional autoregression. Migrant mothers were at higher risk of having depressive symptoms if they lived in a community with predominantly Australian-born mothers and strong social capital as measured by aggregated social networks. These findings suggest that migrant mothers are socially isolated and current home visiting services should be strengthened for migrant mothers living in communities where they may have poor social networks.

  5. Green Maritime Logistics

    DEFF Research Database (Denmark)

    Psaraftis, Harilaos N.

    2014-01-01

    chain management. The traditional analysis of these problems has been in terms of cost- benefit and other optimization criteria from the point of view of the logistics provider, carrier, shipper, or other end-user. Such traditional analysis by and large either ignores environmental issues, or considers......Typical problems in maritime logistics include, among others, optimal ship speed, ship routing and scheduling, fleet deployment, fleet size and mix, weather routing, intermodal network design, modal split, transshipment, queuing at ports, terminal management, berth allocation, and total supply...... them of secondary importance. Green maritime logistics tries to bring the environmental dimension into the problem, and specifically the dimension of emissions reduction, by analyzing various trade-offs and exploring ‘win-win’ solutions. This talk takes a look at the trade-offs that are at stake...

  6. Extended evolution: A conceptual framework for integrating regulatory networks and niche construction.

    Science.gov (United States)

    Laubichler, Manfred D; Renn, Jürgen

    2015-11-01

    This paper introduces a conceptual framework for the evolution of complex systems based on the integration of regulatory network and niche construction theories. It is designed to apply equally to cases of biological, social and cultural evolution. Within the conceptual framework we focus especially on the transformation of complex networks through the linked processes of externalization and internalization of causal factors between regulatory networks and their corresponding niches and argue that these are an important part of evolutionary explanations. This conceptual framework extends previous evolutionary models and focuses on several challenges, such as the path-dependent nature of evolutionary change, the dynamics of evolutionary innovation and the expansion of inheritance systems.

  7. The research of constructing dynamic cognition model based on brain network

    Directory of Open Access Journals (Sweden)

    Fang Chunying

    2017-03-01

    Full Text Available Estimating the functional interactions and connections between brain regions to corresponding process in cognitive, behavioral and psychiatric domains is a central pursuit for understanding the human connectome. Few studies have examined the effects of dynamic evolution on cognitive processing and brain activation using brain network model in scalp electroencephalography (EEG data. Aim of this study was to investigate the brain functional connectivity and construct dynamic programing model from EEG data and to evaluate a possible correlation between topological characteristics of the brain connectivity and cognitive evolution processing. Here, functional connectivity between brain regions is defined as the statistical dependence between EEG signals in different brain areas and is typically determined by calculating the relationship between regional time series using wavelet coherence. We present an accelerated dynamic programing algorithm to construct dynamic cognitive model that we found that spatially distributed regions coherence connection difference, the topologic characteristics with which they can transfer information, producing temporary network states. Our findings suggest that brain dynamics give rise to variations in complex network properties over time after variation audio stimulation, dynamic programing model gives the dynamic evolution processing at different time and frequency. In this paper, by applying a new construct approach to understand whole brain network dynamics, firstly, brain network is constructed by wavelet coherence, secondly, different time active brain regions are selected by network topological characteristics and minimum spanning tree. Finally, dynamic evolution model is constructed to understand cognitive process by dynamic programing algorithm, this model is applied to the auditory experiment, results showed that, quantitatively, more correlation was observed after variation audio stimulation, the EEG function

  8. Characterizing system dynamics with a weighted and directed network constructed from time series data

    Science.gov (United States)

    Sun, Xiaoran; Small, Michael; Zhao, Yi; Xue, Xiaoping

    2014-06-01

    In this work, we propose a novel method to transform a time series into a weighted and directed network. For a given time series, we first generate a set of segments via a sliding window, and then use a doubly symbolic scheme to characterize every windowed segment by combining absolute amplitude information with an ordinal pattern characterization. Based on this construction, a network can be directly constructed from the given time series: segments corresponding to different symbol-pairs are mapped to network nodes and the temporal succession between nodes is represented by directed links. With this conversion, dynamics underlying the time series has been encoded into the network structure. We illustrate the potential of our networks with a well-studied dynamical model as a benchmark example. Results show that network measures for characterizing global properties can detect the dynamical transitions in the underlying system. Moreover, we employ a random walk algorithm to sample loops in our networks, and find that time series with different dynamics exhibits distinct cycle structure. That is, the relative prevalence of loops with different lengths can be used to identify the underlying dynamics.

  9. Constructing minimal phylogenetic networks from softwired clusters is fixed parameter tractable

    CERN Document Server

    Kelk, Steven

    2011-01-01

    Here we show that, given a set of clusters C on a set of taxa X, where |X|=n, it is possible to determine in time f(k).poly(n) whether there exists a level-<= k network (i.e. a network where each biconnected component has reticulation number at most k) that represents all the clusters in C in the softwired sense, and if so to construct such a network. This extends a polynomial time result from "On the elusiveness of clusters" by Kelk, Scornavacca and Van Iersel(2011). By generalizing the concept of "level-k generator" to general networks, we then extend this fixed parameter tractability result to the problem where k refers not to the level but to the reticulation number of the whole network.

  10. An Optimal CDS Construction Algorithm with Activity Scheduling in Ad Hoc Networks

    Science.gov (United States)

    Penumalli, Chakradhar; Palanichamy, Yogesh

    2015-01-01

    A new energy efficient optimal Connected Dominating Set (CDS) algorithm with activity scheduling for mobile ad hoc networks (MANETs) is proposed. This algorithm achieves energy efficiency by minimizing the Broadcast Storm Problem [BSP] and at the same time considering the node's remaining energy. The Connected Dominating Set is widely used as a virtual backbone or spine in mobile ad hoc networks [MANETs] or Wireless Sensor Networks [WSN]. The CDS of a graph representing a network has a significant impact on an efficient design of routing protocol in wireless networks. Here the CDS is a distributed algorithm with activity scheduling based on unit disk graph [UDG]. The node's mobility and residual energy (RE) are considered as parameters in the construction of stable optimal energy efficient CDS. The performance is evaluated at various node densities, various transmission ranges, and mobility rates. The theoretical analysis and simulation results of this algorithm are also presented which yield better results. PMID:26221627

  11. Construction of citrus gene coexpression networks from microarray data using random matrix theory.

    Science.gov (United States)

    Du, Dongliang; Rawat, Nidhi; Deng, Zhanao; Gmitter, Fred G

    2015-01-01

    After the sequencing of citrus genomes, gene function annotation is becoming a new challenge. Gene coexpression analysis can be employed for function annotation using publicly available microarray data sets. In this study, 230 sweet orange (Citrus sinensis) microarrays were used to construct seven coexpression networks, including one condition-independent and six condition-dependent (Citrus canker, Huanglongbing, leaves, flavedo, albedo, and flesh) networks. In total, these networks contain 37 633 edges among 6256 nodes (genes), which accounts for 52.11% measurable genes of the citrus microarray. Then, these networks were partitioned into functional modules using the Markov Cluster Algorithm. Significantly enriched Gene Ontology biological process terms and KEGG pathway terms were detected for 343 and 60 modules, respectively. Finally, independent verification of these networks was performed using another expression data of 371 genes. This study provides new targets for further functional analyses in citrus.

  12. A Hybrid Constructive Algorithm for Single-Layer Feedforward Networks Learning.

    Science.gov (United States)

    Wu, Xing; Rózycki, Paweł; Wilamowski, Bogdan M

    2015-08-01

    Single-layer feedforward networks (SLFNs) have been proven to be a universal approximator when all the parameters are allowed to be adjustable. It is widely used in classification and regression problems. The SLFN learning involves two tasks: determining network size and training the parameters. Most current algorithms could not be satisfactory to both sides. Some algorithms focused on construction and only tuned part of the parameters, which may not be able to achieve a compact network. Other gradient-based optimization algorithms focused on parameters tuning while the network size has to be preset by the user. Therefore, trial-and-error approach has to be used to search the optimal network size. Because results of each trial cannot be reused in another trial, it costs much computation. In this paper, a hybrid constructive (HC)algorithm is proposed for SLFN learning, which can train all the parameters and determine the network size simultaneously. At first, by combining Levenberg-Marquardt algorithm and least-square method, a hybrid algorithm is presented for training SLFN with fixed network size. Then,with the hybrid algorithm, an incremental constructive scheme is proposed. A new randomly initialized neuron is added each time when the training entrapped into local minima. Because the training continued on previous results after adding new neurons, the proposed HC algorithm works efficiently. Several practical problems were given for comparison with other popular algorithms. The experimental results demonstrated that the HC algorithm worked more efficiently than those optimization methods with trial and error, and could achieve much more compact SLFN than those construction algorithms.

  13. A computational framework for the automated construction of glycosylation reaction networks.

    Directory of Open Access Journals (Sweden)

    Gang Liu

    Full Text Available Glycosylation is among the most common and complex post-translational modifications identified to date. It proceeds through the catalytic action of multiple enzyme families that include the glycosyltransferases that add monosaccharides to growing glycans, and glycosidases which remove sugar residues to trim glycans. The expression level and specificity of these enzymes, in part, regulate the glycan distribution or glycome of specific cell/tissue systems. Currently, there is no systematic method to describe the enzymes and cellular reaction networks that catalyze glycosylation. To address this limitation, we present a streamlined machine-readable definition for the glycosylating enzymes and additional methodologies to construct and analyze glycosylation reaction networks. In this computational framework, the enzyme class is systematically designed to store detailed specificity data such as enzymatic functional group, linkage and substrate specificity. The new classes and their associated functions enable both single-reaction inference and automated full network reconstruction, when given a list of reactants and/or products along with the enzymes present in the system. In addition, graph theory is used to support functions that map the connectivity between two or more species in a network, and that generate subset models to identify rate-limiting steps regulating glycan biosynthesis. Finally, this framework allows the synthesis of biochemical reaction networks using mass spectrometry (MS data. The features described above are illustrated using three case studies that examine: i O-linked glycan biosynthesis during the construction of functional selectin-ligands; ii automated N-linked glycosylation pathway construction; and iii the handling and analysis of glycomics based MS data. Overall, the new computational framework enables automated glycosylation network model construction and analysis by integrating knowledge of glycan structure and enzyme

  14. A hierarchical virtual backbone construction protocol for mobile ad hoc networks

    Directory of Open Access Journals (Sweden)

    Bharti Sharma

    2016-07-01

    Full Text Available We propose a hierarchical backbone construction protocol for mobile ad hoc networks. Our protocol is based on the idea of using an efficient extrema finding method to create clusters comprising the nodes that are within certain prespecified wireless hop distance. Afterward, we apply our ‘diameter’ algorithm among clusters to identify the dominating nodes that are, finally, connected via multi-hop virtual links to construct the backbone. We present the analytic as well as simulation study of our algorithm and also a method for the dynamic maintenance of constructed backbone. In the end, we illustrate the use of the virtual backbone with the help of an interesting application.

  15. The Research of Constructing Logistics Statistical Index System%物流统计指标体系构建研究

    Institute of Scientific and Technical Information of China (English)

    徐娟

    2011-01-01

    Although the rapid development of China's logistics industry, but there is no scientific, practical, accurate and effective statistical indicators system with corresponding. So it can not accurately and effectively reflect the development of the logistics industry. In this paper, we build a set of logistics statistical indicators system according the development trend of modem logistics.%虽然我国的物流业发展迅速,但却没有科学使用、准确有效的统计指标体系与之相适应,因此不能准确有效地了解物流业的发展状况。结合现代物流的发展趋势,构建了一套物流统计指标体系。

  16. Criteria of Categorizing Logistics and Distribution Centres

    OpenAIRE

    Darko Babić; Anđelko Šćukanec; Kristijan Rogic

    2011-01-01

    Logistics and distribution centres represent very significant infrastructure elements of the macro-logistic system. The creation of the logistics and distribution centres and their connection into a wide (global) network have resulted in the creation of conditions for an adequate distribution of labour and significant increase in the productivity of all the logistics elements and processes, noting that the logistics and distribution centres in this concept have a superregional significance. ...

  17. 大连建设东北亚国际物流中心的思考%Thinking On Construction of The Northeast Asia International Logistics Center in Dalian

    Institute of Scientific and Technical Information of China (English)

    徐丰伟

    2011-01-01

    It is necessary for Dalian to set up The Northeast Asia International Logistics Center to achieve its goals: to enhance city competitiveness,to promote the development of regional economy in Northeast China,to implement the national strategies of development.The following composition introduces the available advantages that Dalian has as well as posers that Dalian needs to fight against.Insightful advice to promote development of this logistics center is also provided in the following part in the line of policy and service system,port resources,network system of logistics,logistics market and the main body of logistics,logistics information network and platform.%大连建设东北亚国际物流中心是实现国家发展战略和东北区域经济发展的客观要求,也是提升大连城市竞争力的有效途径。本文分析了大连建设东北亚国际物流中心过程中已具备的优势和面临的问题,并从政策和服务体系、港口资源和物流网络体系、物流市场及主体、物流信息化网络和平台等方面提出了推进大连东北亚国际物流中心的建议。

  18. 服务轨道交通产业集群的株洲市物流信息平台构建研究*%Service Rail Transit Industry Cluster of Zhuzhou City Logistics Information Platform Construction Research

    Institute of Scientific and Technical Information of China (English)

    刘鑫

    2013-01-01

    Construction of rail transit industry cluster of zhuzhou city logistics information platform,in zhuzhou city economic development plays an important role.Based on the path of the city logistics information platform to build,to refine the service under the rail transit industry cluster of city logistics information platform structure mode.%构建轨道交通产业集群的株洲市物流信息平台,对于株洲市经济的发展具有重要作用。文中通过对市级物流信息平台的路径构建,提炼了服务轨道交通产业集群下的市级物流信息平台结构模型。

  19. The Discursive Construction of Teachers’ Desirable Identity on a Social Networking Site

    Directory of Open Access Journals (Sweden)

    Radzuwan Ab Rashid

    2016-09-01

    Full Text Available This study is situated in the broader identity-construction literature. Bringing discourse community theory to examine teachers’ postings on Facebook Timelines, we explored how teachers discursively construct socially desirable identities to fit into the Timeline community. Data were gathered from the Status updates and Comments on 29 Timelines belonged to Malaysian English language teachers who were purposively chosen as they often posted and commented on teaching-related issues on their Timelines. The analysis shows that the commonest form of identity construction on the teachers’ Timelines was as an engager which had been carefully constructed to portray positive self-image. This paper concludes that when participating on a public networking site, the teachers were being strategic as not to construct identities which could tarnish their professional image. Keywords: English language teachers, Malaysia, discursive identity, Facebook, engager

  20. A Networked Learning Model for Construction of Personal Learning Environments in Seventh Grade Life Science

    Science.gov (United States)

    Drexler, Wendy

    2010-01-01

    The purpose of this design-based research case study was to apply a networked learning approach to a seventh grade science class at a public school in the southeastern United States. Students adapted Web applications to construct personal learning environments for in-depth scientific inquiry of poisonous and venomous life forms. API widgets were…

  1. Regulatory Network Construction in Arabidopsis using genome-wide gene expression QTLs

    NARCIS (Netherlands)

    Keurentjes, J.J.B.; Fu, J.J.; Terpstra, I.R.; Garcia, J.M.; van den Ackerveken, G.; Snoek, L.B.; Peeters, A.J.M.; Vreugdenhil, D.; Koornreef, M.; Jansen, R.C.

    2007-01-01

    Regulatory network construction in Arabidopsis by using genome-wide gene expression quantitative trait loci.Keurentjes JJ, Fu J, Terpstra IR, Garcia JM, van den Ackerveken G, Snoek LB, Peeters AJ, Vreugdenhil D, Koornneef M, Jansen RC. Laboratory of Genetics, Wageningen University, Arboretumlaan 4,

  2. 广东省农产品绿色物流系统构建及其运作模式研究%RESEARCH ON AGRICULTURAL PRODUCT GREEN LOGISTICS TECHNOLOGY SYSTEM CONSTRUCTION AND ITS OPERATION IN GUANGDONG PROVINCE

    Institute of Scientific and Technical Information of China (English)

    陈宝丹

    2016-01-01

    At present, the logistics industry of agricultural products has become a new growth to accelerate the con-struction of new rural areas and the development of rural economy. At the same time, with the change of people′s consumption concept, the demand for the distribution of agricultural products has gradually transformed into a healthy and environmentally friendly, safe and efficient logistics model. Therefore, we should pay attention to not only the green production process of agricultural products, but also the construction of agricultural logistics system and its operation mode. The demand for agricultural products in Guangdong province is high, while therequirement of green agricultural products logistics distribution mode is relatively higher. Taking Guangdong province as an ex-ample, this paper analyzed the problems of the green logistics of agricultural products, such as the backward green logistics concepts, the low green degree of the transport of agricultural products,and so on. It constructed the green logistics system of agricultural products logistics from center node, regional planning, and logistics channel, and discussed the green logistics mode, i. e. , the wholesale market leading mode, industry association leading mode, and the third party logistics enterprise dominant mode. At the same time in order to ensure the normal operation of the green logistics, it was necessary to implement the policy, talent, technology, capital and safeguard measures to effectively reduce the cost of the logistics of agricultural products, enhance rural economic benefit at the same time, and promote a significant increase in the wage income of farmers.%目前,农产品物流产业已经成为加快新农村建设与促进农村经济发展的新增长点。同时,随着人们消费理念的转变,对农产品的配送要求逐步转变为健康环保、安全快捷的物流模式,因此既要注意农产品的绿色生产过程,更要重视农产品物流

  3. Construction and Analysis of Functional Networks in the Gut Microbiome of Type 2 Diabetes Patients

    Institute of Scientific and Technical Information of China (English)

    Lianshuo Li; Zicheng Wang; Peng He; Shining Ma; Jie Du; Rui Jiang

    2016-01-01

    Although networks of microbial species have been widely used in the analysis of 16S rRNA sequencing data of a microbiome, the construction and analysis of a complete microbial gene network are in general problematic because of the large number of microbial genes in metagenomics studies. To overcome this limitation, we propose to map microbial genes to functional units, includ-ing KEGG orthologous groups and the evolutionary genealogy of genes:Non-supervised Ortholo-gous Groups (eggNOG) orthologous groups, to enable the construction and analysis of a microbial functional network. We devised two statistical methods to infer pairwise relationships between microbial functional units based on a deep sequencing dataset of gut microbiome from type 2 dia-betes (T2D) patients as well as healthy controls. Networks containing such functional units and their significant interactions were constructed subsequently. We conducted a variety of analyses of global properties, local properties, and functional modules in the resulting functional networks. Our data indicate that besides the observations consistent with the current knowledge, this study provides novel biological insights into the gut microbiome associated with T2D.

  4. Measuring Regulatory Restrictions in Logistics Services

    OpenAIRE

    Claire HOLLWEG; Marn-Heong WONG

    2009-01-01

    This study measures the extent of restrictions on trade in logistics services in the ASEAN+6 economies by constructing a logistics regulatory restrictiveness index for each economy that quantifies the extent of government regulations faced by logistics service providers. This is the first study of its kind to construct a regulatory index of the entire logistics sector, which includes the main modes of international transport and customs restrictions. The indices show that large differences ex...

  5. Comparison of logistic regression and neural network classifiers in the detection of hard exudates in retinal images.

    Science.gov (United States)

    Garcia, Maria; Valverde, Carmen; Lopez, Maria I; Poza, Jesus; Hornero, Roberto

    2013-01-01

    Diabetic Retinopathy (DR) is a common cause of visual impairment in industrialized countries. Automatic recognition of DR lesions in retinal images can contribute to the diagnosis and screening of this disease. The aim of this study is to automatically detect one of these lesions: hard exudates (EXs). Based on their properties, we extracted a set of features from image regions and selected the subset that best discriminated between EXs and the retinal background using logistic regression (LR). The LR model obtained, a multilayer perceptron (MLP) classifier and a radial basis function (RBF) classifier were subsequently used to obtain the final segmentation of EXs. Our database contained 130 images with variable color, brightness, and quality. Fifty of them were used to obtain the training examples. The remaining 80 images were used to test the performance of the method. The highest statistics were achieved for MLP or RBF. Using a lesion based criterion, our results reached a mean sensitivity of 95.9% (MLP) and a mean positive predictive value of 85.7% (RBF). With an image-based criterion, we achieved a 100% mean sensitivity, 87.5% mean specificity and 93.8% mean accuracy (MLP and RBF).

  6. APPLICATION OF INTERFIRM NETWORKS CONCEPTS IN THE RETAIL SECTION: AN APPLICATION OF THE BROKER CONCEPTS AND OPERATORS LOGISTICS IN DISTRIBUTING COMPANIES OF FOODS

    Directory of Open Access Journals (Sweden)

    Gesinaldo Ataíde Cândido

    2006-06-01

    Full Text Available One of main the practical ones adopted for the organizations in the current environment business-oriented and of management has been the application of the principles of nets, based in the concepts of the partnership, the association and the co-operation. The experiences of this new type of practical of management have been successful in diverse economic sectors, creating better conditions for the attainment of competitive advantages. In this work, a study is made to see the possibility of application in the sector of food distribution, inside of the new perspectives of the supply management and the logistic one. In this direction, the work makes a diagnosis of the retail sector, verifying the possibilities of the application of the principles of nets in a together operating company to the representation sector and food distribution, from a process of strategic change, considering a management model based in the concepts of brokers and logistic operator, which they substitute and/or they incorporate the diverse involved agents with the food distribution, which are: the commercial representative, the deliverer and the wholesaler. Key words: competitiveness, network organizational, chain of supply.

  7. A case study using support vector machines, neural networks and logistic regression in a GIS to identify wells contaminated with nitrate-N

    Science.gov (United States)

    Dixon, Barnali

    2009-09-01

    Accurate and inexpensive identification of potentially contaminated wells is critical for water resources protection and management. The objectives of this study are to 1) assess the suitability of approximation tools such as neural networks (NN) and support vector machines (SVM) integrated in a geographic information system (GIS) for identifying contaminated wells and 2) use logistic regression and feature selection methods to identify significant variables for transporting contaminants in and through the soil profile to the groundwater. Fourteen GIS derived soil hydrogeologic and landuse parameters were used as initial inputs in this study. Well water quality data (nitrate-N) from 6,917 wells provided by Florida Department of Environmental Protection (USA) were used as an output target class. The use of the logistic regression and feature selection methods reduced the number of input variables to nine. Receiver operating characteristics (ROC) curves were used for evaluation of these approximation tools. Results showed superior performance with the NN as compared to SVM especially on training data while testing results were comparable. Feature selection did not improve accuracy; however, it helped increase the sensitivity or true positive rate (TPR). Thus, a higher TPR was obtainable with fewer variables.

  8. Constructing Logistics E-commerce Platform Based on Internet of Things%基于物联网技术的物流电子商务平台构建

    Institute of Scientific and Technical Information of China (English)

    韩嘉; 李宗平

    2012-01-01

    Expounding the impacts of Internet of Things technology for logistics e -commerce in intelligenttraceability, intelligent monitoring, intelligent collaborative operation and intelligent management. Combining Internet of Things characteristics and logistics e -commerce development trend, provide professional online logistics service and other value-added services throughout all links of logistics for logistics enterprises, suppliers, manufacturers, retailers, partners, customers, the government and the bank. Based on the SOA framework and the three-tier of Internet of Things, to design the logistics e-commerce platform framework based Internet of Things, which including logistics resources layer, data collection layer, network communication layer, data layer, application layer and user layer. Finally, analyze the future development of the platform.%阐述了物联网技术对物流电子商务在智能追溯、智能监控、智能协同作业和智能管理四个方面的影响.结合物联网技术特点和物流电子商务发展趋势,面向物流企业、供应商、制造商、零售商、合作伙伴、客户、政府和银行等,为其提供贯穿物流所有环节的专业化在线物流服务和其他增值服务.以SOA架构和物联网三层架构为基础,对基于物联网技术的物流电子商务平台进行设计,其架构包括物流资源层、数据采集层、网络通信层、数据层、应用层和用户层.最后,分析该平台未来发展展望.

  9. Construction of Pipelined Strategic Connected Dominating Set for Mobile Ad Hoc Networks

    Directory of Open Access Journals (Sweden)

    Ceronmani Sharmila

    2016-06-01

    Full Text Available Efficient routing between nodes is the most important challenge in a Mobile Ad Hoc Network (MANET. A Connected Dominating Set (CDS acts as a virtual backbone for routing in a MANET. Hence, the construction of CDS based on the need and its application plays a vital role in the applications of MANET. The PipeLined Strategic CDS (PLS-CDS is constructed based on strategy, dynamic diameter and transmission range. The strategy used for selecting the starting node is, any source node in the network, which has its entire destination within a virtual pipelined coverage, instead of the node with maximum connectivity. The other nodes are then selected based on density and velocity. The proposed CDS also utilizes the energy of the nodes in the network in an optimized manner. Simulation results showed that the proposed algorithm is better in terms of size of the CDS and average hop per path length.

  10. Comparison of Artificial Neural Network with Logistic Regression as Classification Models for Variable Selection for Prediction of Breast Cancer Patient Outcomes

    Directory of Open Access Journals (Sweden)

    Valérie Bourdès

    2010-01-01

    Full Text Available The aim of this study was to compare multilayer perceptron neural networks (NNs with standard logistic regression (LR to identify key covariates impacting on mortality from cancer causes, disease-free survival (DFS, and disease recurrence using Area Under Receiver-Operating Characteristics (AUROC in breast cancer patients. From 1996 to 2004, 2,535 patients diagnosed with primary breast cancer entered into the study at a single French centre, where they received standard treatment. For specific mortality as well as DFS analysis, the ROC curves were greater with the NN models compared to LR model with better sensitivity and specificity. Four predictive factors were retained by both approaches for mortality: clinical size stage, Scarff Bloom Richardson grade, number of invaded nodes, and progesterone receptor. The results enhanced the relevance of the use of NN models in predictive analysis in oncology, which appeared to be more accurate in prediction in this French breast cancer cohort.

  11. Sensitivity analysis applied to the construction of radial basis function networks.

    Science.gov (United States)

    Shi, D; Yeung, D S; Gao, J

    2005-09-01

    Conventionally, a radial basis function (RBF) network is constructed by obtaining cluster centers of basis function by maximum likelihood learning. This paper proposes a novel learning algorithm for the construction of radial basis function using sensitivity analysis. In training, the number of hidden neurons and the centers of their radial basis functions are determined by the maximization of the output's sensitivity to the training data. In classification, the minimal number of such hidden neurons with the maximal sensitivity will be the most generalizable to unknown data. Our experimental results show that our proposed sensitivity-based RBF classifier outperforms the conventional RBFs and is as accurate as support vector machine (SVM). Hence, sensitivity analysis is expected to be a new alternative way to the construction of RBF networks.

  12. 烟草商业区域物流核心竞争力的构建%The Construction of Regional Logistics Core Competitiveness in Tobacco Business

    Institute of Scientific and Technical Information of China (English)

    徐佳宏

    2011-01-01

    2010年,全国烟草行业现代物流建设工作会议明确了烟草物流的行业核心业务地位。下一阶段,能否提高烟草物流的核心竞争力,关系到其核心地位的稳固性。通过研究,明确了烟草区域物流的价值定位,提出了烟草区域物流应充分利用自身资源,重构自身价值系统,打造与工业企业、零售客户及消费者的外部服务价值链以及企业内部服务价值链,建立功能完善、反应敏捷、服务到位、成本较低的现代物流体系,并对烟草商业物流的未来进行了展望。%In 2010, the national tobacco industry conference about modern logistics development made it clear that logistics plays a core role in the tobacco business. Within the follow- ing phase, it is whether the core competitiveness in tobacco logistics can be enhanced that really matters in keeping it stable. Researches have been done to orient in the values of tobacco regional logistics and propose that its resources should be made the best of to rebuild its value system. By means of forging the external service value chain between the logistics and industrial enterprises, retail clients as well as consumers and the internal ones within the enterprises themselves, the modern logistics system is to be established, incorporating in- tegrated functions, prompt responses, considerate service and low costs, with a better prospect fnr the future of logistics in tobacco business.

  13. Evaluation of gene association methods for coexpression network construction and biological knowledge discovery.

    Directory of Open Access Journals (Sweden)

    Sapna Kumari

    Full Text Available BACKGROUND: Constructing coexpression networks and performing network analysis using large-scale gene expression data sets is an effective way to uncover new biological knowledge; however, the methods used for gene association in constructing these coexpression networks have not been thoroughly evaluated. Since different methods lead to structurally different coexpression networks and provide different information, selecting the optimal gene association method is critical. METHODS AND RESULTS: In this study, we compared eight gene association methods - Spearman rank correlation, Weighted Rank Correlation, Kendall, Hoeffding's D measure, Theil-Sen, Rank Theil-Sen, Distance Covariance, and Pearson - and focused on their true knowledge discovery rates in associating pathway genes and construction coordination networks of regulatory genes. We also examined the behaviors of different methods to microarray data with different properties, and whether the biological processes affect the efficiency of different methods. CONCLUSIONS: We found that the Spearman, Hoeffding and Kendall methods are effective in identifying coexpressed pathway genes, whereas the Theil-sen, Rank Theil-Sen, Spearman, and Weighted Rank methods perform well in identifying coordinated transcription factors that control the same biological processes and traits. Surprisingly, the widely used Pearson method is generally less efficient, and so is the Distance Covariance method that can find gene pairs of multiple relationships. Some analyses we did clearly show Pearson and Distance Covariance methods have distinct behaviors as compared to all other six methods. The efficiencies of different methods vary with the data properties to some degree and are largely contingent upon the biological processes, which necessitates the pre-analysis to identify the best performing method for gene association and coexpression network construction.

  14. Neural networks and chaos: construction, evaluation of chaotic networks, and prediction of chaos with multilayer feedforward networks.

    Science.gov (United States)

    Bahi, Jacques M; Couchot, Jean-François; Guyeux, Christophe; Salomon, Michel

    2012-03-01

    Many research works deal with chaotic neural networks for various fields of application. Unfortunately, up to now, these networks are usually claimed to be chaotic without any mathematical proof. The purpose of this paper is to establish, based on a rigorous theoretical framework, an equivalence between chaotic iterations according to Devaney and a particular class of neural networks. On the one hand, we show how to build such a network, on the other hand, we provide a method to check if a neural network is a chaotic one. Finally, the ability of classical feedforward multilayer perceptrons to learn sets of data obtained from a dynamical system is regarded. Various boolean functions are iterated on finite states. Iterations of some of them are proven to be chaotic as it is defined by Devaney. In that context, important differences occur in the training process, establishing with various neural networks that chaotic behaviors are far more difficult to learn.

  15. Discussing of Military Logistics System Construction Based on Internet of Things%基于物联网的军事物流体系建设探讨

    Institute of Scientific and Technical Information of China (English)

    许子君; 杜秋; 傅昊

    2012-01-01

    为提高军事物流效益,对基于物联网(the internet of things)的军事物流体系进行研究.根据物联网的概念及特点,分析物联网对军事物流的影响,并在此基础上构建基于物联网新模式下的5个层次、2个体系的军事物流信息平台的体系框架结构.该研究可为军事物流建设提供一定的参考.%For improving the military logistics efficiency, study on military logistics system based on the internet of things. According to the concept and features of the internet of things, analyze the influence of the internet of things on military logistics, and based on this, establish the five levels and two systems of the military logistics information platform system framework structure. It can provides a certain reference in researching military logistics.

  16. 电子商务环境下的物流模式架构%Logistic Model Construction under E-commerce Environment

    Institute of Scientific and Technical Information of China (English)

    苑礼兵; 迟雪丽

    2014-01-01

    Under the e-commerce environment, the development of the logistics industry is facing new opportunities and challenges, and it presents the new development trend. Firstly, this paper explores the development prospect of logistics industry under the e-commerce environment, and then analyzes the existing problems of logistics management and studies the countermeasures. This article also puts forward the improvement and innovation problems of concrete measures of logistics management and logistics value-added services, etc. under the e-commerce environment improvement.%电子商务环境下,物流业的发展面临着新的机通和挑战,并呈现出新的发展趋势。本文首先探寻了电子商务环境下物流发展的前景,然后分析了在电子商务环境下物流管理存在的同题,对这些问题的相应对策进行了研究,并提出电子商务环境下物流管理改进的具体措施、物流增值性服务等的改进和创新问题。

  17. Construction of Gene Regulatory Networks Using Recurrent Neural Networks and Swarm Intelligence.

    Science.gov (United States)

    Khan, Abhinandan; Mandal, Sudip; Pal, Rajat Kumar; Saha, Goutam

    2016-01-01

    We have proposed a methodology for the reverse engineering of biologically plausible gene regulatory networks from temporal genetic expression data. We have used established information and the fundamental mathematical theory for this purpose. We have employed the Recurrent Neural Network formalism to extract the underlying dynamics present in the time series expression data accurately. We have introduced a new hybrid swarm intelligence framework for the accurate training of the model parameters. The proposed methodology has been first applied to a small artificial network, and the results obtained suggest that it can produce the best results available in the contemporary literature, to the best of our knowledge. Subsequently, we have implemented our proposed framework on experimental (in vivo) datasets. Finally, we have investigated two medium sized genetic networks (in silico) extracted from GeneNetWeaver, to understand how the proposed algorithm scales up with network size. Additionally, we have implemented our proposed algorithm with half the number of time points. The results indicate that a reduction of 50% in the number of time points does not have an effect on the accuracy of the proposed methodology significantly, with a maximum of just over 15% deterioration in the worst case.

  18. Underground logistics

    CERN Document Server

    Foraz, K; CERN. Geneva. TS Department

    2005-01-01

    More than 80’000 tons of materials have to be transported and installed down into the LHC tunnel. The magnet assemblies which represent about 50’000 tons, will be transported according to the master schedule between March 2005 and November 2006. Considering that these about 1’800 cryo-magnets will be transported at a maximum speed of 3 km/h in a narrow tube (where installation works and hardware commissioning activities are ongoing) this duration of 21 months is a real challenge. This paper aims at describing: - the information flows between the different people involved in the logistics attached to the cryo-magnets, - the organization chosen within the Installation Coordination group, - the problems encountered so far and the solutions adopted. The coordination process with other underground transport and activities, mainly for the QRL will also be presented.

  19. Connection with seismic networks and construction of real time earthquake monitoring system

    Energy Technology Data Exchange (ETDEWEB)

    Chi, Heon Cheol; Lee, H. I.; Shin, I. C.; Lim, I. S.; Park, J. H.; Lee, B. K.; Whee, K. H.; Cho, C. S. [Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)

    2000-12-15

    It is natural to use the nuclear power plant seismic network which have been operated by KEPRI(Korea Electric Power Research Institute) and local seismic network by KIGAM(Korea Institute of Geology, Mining and Material). The real time earthquake monitoring system is composed with monitoring module and data base module. Data base module plays role of seismic data storage and classification and the other, monitoring module represents the status of acceleration in the nuclear power plant area. This research placed the target on the first, networking the KIN's seismic monitoring system with KIGAM and KEPRI seismic network and the second, construction the KIN's Independent earthquake monitoring system.

  20. Developmental self-construction and -configuration of functional neocortical neuronal networks.

    Science.gov (United States)

    Bauer, Roman; Zubler, Frédéric; Pfister, Sabina; Hauri, Andreas; Pfeiffer, Michael; Muir, Dylan R; Douglas, Rodney J

    2014-12-01

    The prenatal development of neural circuits must provide sufficient configuration to support at least a set of core postnatal behaviors. Although knowledge of various genetic and cellular aspects of development is accumulating rapidly, there is less systematic understanding of how these various processes play together in order to construct such functional networks. Here we make some steps toward such understanding by demonstrating through detailed simulations how a competitive co-operative ('winner-take-all', WTA) network architecture can arise by development from a single precursor cell. This precursor is granted a simplified gene regulatory network that directs cell mitosis, differentiation, migration, neurite outgrowth and synaptogenesis. Once initial axonal connection patterns are established, their synaptic weights undergo homeostatic unsupervised learning that is shaped by wave-like input patterns. We demonstrate how this autonomous genetically directed developmental sequence can give rise to self-calibrated WTA networks, and compare our simulation results with biological data.

  1. Time for a real shift to relations: appraisal of Social Network Analysis applications in the UK construction industry

    Directory of Open Access Journals (Sweden)

    Ximing Ruan

    2013-03-01

    Full Text Available The Social Network Analysis (SNA has been adopted in the UK construction management research and generated meaningful insights in analysing project management organisations from network perspectives. As an effective tool, social network analysis has been used to analyse information and knowledge flow between construction project teams which is considered as foundation for collaborative working and subsequently improving overall performance. Social network analysis is based on an assumption of the importance of relationships among interacting units. The social network perspective encompasses theories, models and applications that are expressed in terms of relational concepts or processes. Many believe, moreover, that the success or failure of organisations often depends on the patterning of their internal structure. This paper reviewed existing literatures on SNA applications in construction industry from three leading construction management journals.  From the review, the research proposed some advance in the application of SNA in the construction industry.

  2. Time for a real shift to relations: appraisal of Social Network Analysis applications in the UK construction industry

    Directory of Open Access Journals (Sweden)

    Ximing Ruan

    2013-03-01

    Full Text Available The Social Network Analysis (SNA has been adopted in the UK construction management research and generated meaningful insights in analysing project management organisations from network perspectives. As an effective tool, social network analysis has been used to analyse information and knowledge flow between construction project teams which is considered as foundation for collaborative working and subsequently improving overall performance. Social network analysis is based on an assumption of the importance of relationships among interacting units. The social network perspective encompasses theories, models and applications that are expressed in terms of relational concepts or processes. Many believe, moreover, that the success or failure of organisations often depends on the patterning of their internal structure. This paper reviewed existing literatures on SNA applications in construction industry from three leading construction management journals.  From the review, the research proposed some advance in the application of SNA in the construction industry. 

  3. An Efficient Distributed Algorithm for Constructing Spanning Trees in Wireless Sensor Networks

    Directory of Open Access Journals (Sweden)

    Rosana Lachowski

    2015-01-01

    Full Text Available Monitoring and data collection are the two main functions in wireless sensor networks (WSNs. Collected data are generally transmitted via multihop communication to a special node, called the sink. While in a typical WSN, nodes have a sink node as the final destination for the data traffic, in an ad hoc network, nodes need to communicate with each other. For this reason, routing protocols for ad hoc networks are inefficient for WSNs. Trees, on the other hand, are classic routing structures explicitly or implicitly used in WSNs. In this work, we implement and evaluate distributed algorithms for constructing routing trees in WSNs described in the literature. After identifying the drawbacks and advantages of these algorithms, we propose a new algorithm for constructing spanning trees in WSNs. The performance of the proposed algorithm and the quality of the constructed tree were evaluated in different network scenarios. The results showed that the proposed algorithm is a more efficient solution. Furthermore, the algorithm provides multiple routes to the sensor nodes to be used as mechanisms for fault tolerance and load balancing.

  4. An efficient distributed algorithm for constructing spanning trees in wireless sensor networks.

    Science.gov (United States)

    Lachowski, Rosana; Pellenz, Marcelo E; Penna, Manoel C; Jamhour, Edgard; Souza, Richard D

    2015-01-14

    Monitoring and data collection are the two main functions in wireless sensor networks (WSNs). Collected data are generally transmitted via multihop communication to a special node, called the sink. While in a typical WSN, nodes have a sink node as the final destination for the data traffic, in an ad hoc network, nodes need to communicate with each other. For this reason, routing protocols for ad hoc networks are inefficient for WSNs. Trees, on the other hand, are classic routing structures explicitly or implicitly used in WSNs. In this work, we implement and evaluate distributed algorithms for constructing routing trees in WSNs described in the literature. After identifying the drawbacks and advantages of these algorithms, we propose a new algorithm for constructing spanning trees in WSNs. The performance of the proposed algorithm and the quality of the constructed tree were evaluated in different network scenarios. The results showed that the proposed algorithm is a more efficient solution. Furthermore, the algorithm provides multiple routes to the sensor nodes to be used as mechanisms for fault tolerance and load balancing.

  5. An integrated and dynamic optimisation model for the multi-level emergency logistics network in anti-bioterrorism system

    Science.gov (United States)

    Liu, Ming; Zhao, Lindu

    2012-08-01

    Demand for emergency resources is usually uncertain and varies quickly in anti-bioterrorism system. Besides, emergency resources which had been allocated to the epidemic areas in the early rescue cycle will affect the demand later. In this article, an integrated and dynamic optimisation model with time-varying demand based on the epidemic diffusion rule is constructed. The heuristic algorithm coupled with the MATLAB mathematical programming solver is adopted to solve the optimisation model. In what follows, the application of the optimisation model as well as a short sensitivity analysis of the key parameters in the time-varying demand forecast model is presented. The results show that both the model and the solution algorithm are useful in practice, and both objectives of inventory level and emergency rescue cost can be controlled effectively. Thus, it can provide some guidelines for decision makers when coping with emergency rescue problem with uncertain demand, and offers an excellent reference when issues pertain to bioterrorism.

  6. Constructing Ecological Networks Based on Habitat Quality Assessment: A Case Study of Changzhou, China

    Science.gov (United States)

    Gao, Yu; Ma, Lei; Liu, Jiaxun; Zhuang, Zhuzhou; Huang, Qiuhao; Li, Manchun

    2017-01-01

    Fragmentation and reduced continuity of habitat patches threaten the environment and biodiversity. Recently, ecological networks are increasingly attracting the attention of researchers as they provide fundamental frameworks for environmental protection. This study suggests a set of procedures to construct an ecological network. First, we proposed a method to construct a landscape resistance surface based on the assessment of habitat quality. Second, to analyze the effect of the resistance surface on corridor simulations, we used three methods to construct resistance surfaces: (1) the method proposed in this paper, (2) the entropy coefficient method, and (3) the expert scoring method. Then, we integrated habitat patches and resistance surfaces to identify potential corridors using graph theory. These procedures were tested in Changzhou, China. Comparing the outputs of using different resistance surfaces demonstrated that: (1) different landscape resistance surfaces contribute to how corridors are identified, but only slightly affect the assessment of the importance of habitat patches and potential corridors; (2) the resistance surface, which is constructed based on habitat quality, is more applicable to corridor simulations; and (3) the assessment of the importance of habitat patches is fundamental for ecological network optimization in the conservation of critical habitat patches and corridors. PMID:28393879

  7. Dynamic Construction Scheme for Virtualization Security Service in Software-Defined Networks.

    Science.gov (United States)

    Lin, Zhaowen; Tao, Dan; Wang, Zhenji

    2017-04-21

    For a Software Defined Network (SDN), security is an important factor affecting its large-scale deployment. The existing security solutions for SDN mainly focus on the controller itself, which has to handle all the security protection tasks by using the programmability of the network. This will undoubtedly involve a heavy burden for the controller. More devastatingly, once the controller itself is attacked, the entire network will be paralyzed. Motivated by this, this paper proposes a novel security protection architecture for SDN. We design a security service orchestration center in the control plane of SDN, and this center physically decouples from the SDN controller and constructs SDN security services. We adopt virtualization technology to construct a security meta-function library, and propose a dynamic security service composition construction algorithm based on web service composition technology. The rule-combining method is used to combine security meta-functions to construct security services which meet the requirements of users. Moreover, the RETE algorithm is introduced to improve the efficiency of the rule-combining method. We evaluate our solutions in a realistic scenario based on OpenStack. Substantial experimental results demonstrate the effectiveness of our solutions that contribute to achieve the effective security protection with a small burden of the SDN controller.

  8. Constructing Ecological Networks Based on Habitat Quality Assessment: A Case Study of Changzhou, China

    Science.gov (United States)

    Gao, Yu; Ma, Lei; Liu, Jiaxun; Zhuang, Zhuzhou; Huang, Qiuhao; Li, Manchun

    2017-04-01

    Fragmentation and reduced continuity of habitat patches threaten the environment and biodiversity. Recently, ecological networks are increasingly attracting the attention of researchers as they provide fundamental frameworks for environmental protection. This study suggests a set of procedures to construct an ecological network. First, we proposed a method to construct a landscape resistance surface based on the assessment of habitat quality. Second, to analyze the effect of the resistance surface on corridor simulations, we used three methods to construct resistance surfaces: (1) the method proposed in this paper, (2) the entropy coefficient method, and (3) the expert scoring method. Then, we integrated habitat patches and resistance surfaces to identify potential corridors using graph theory. These procedures were tested in Changzhou, China. Comparing the outputs of using different resistance surfaces demonstrated that: (1) different landscape resistance surfaces contribute to how corridors are identified, but only slightly affect the assessment of the importance of habitat patches and potential corridors; (2) the resistance surface, which is constructed based on habitat quality, is more applicable to corridor simulations; and (3) the assessment of the importance of habitat patches is fundamental for ecological network optimization in the conservation of critical habitat patches and corridors.

  9. Time Contingency Assessment in Construction Projects in Egypt using Artificial Neural Networks Model

    Directory of Open Access Journals (Sweden)

    Hazem Yahia

    2011-07-01

    Full Text Available Time schedule is an essential tool for construction project management. For instance, it can materially help to identify the expected financial requirements. It is also an important tool for the time control process. Construction project time schedule is greatly affected by many uncertain but predictable factors. Hence, a certain percentage of time contingency should be added to the scheduled time to arrive at more reliable time schedule. In this research, the most important factors affecting time contingency in construction projects were identified based on a comprehensive survey among a collected sample of the Egyptian construction experts. In addition, a neural networks model was developed in order to help project planner to have a more reliable prediction for the amount of time contingency that should be added to the scheduled completion time. This paper explains the data collection process, lists the main factors affecting time contingency and discusses the model development methodology.

  10. A novel constructive-optimizer neural network for the traveling salesman problem.

    Science.gov (United States)

    Saadatmand-Tarzjan, Mahdi; Khademi, Morteza; Akbarzadeh-T, Mohammad-R; Moghaddam, Hamid Abrishami

    2007-08-01

    In this paper, a novel constructive-optimizer neural network (CONN) is proposed for the traveling salesman problem (TSP). CONN uses a feedback structure similar to Hopfield-type neural networks and a competitive training algorithm similar to the Kohonen-type self-organizing maps (K-SOMs). Consequently, CONN is composed of a constructive part, which grows the tour and an optimizer part to optimize it. In the training algorithm, an initial tour is created first and introduced to CONN. Then, it is trained in the constructive phase for adding a number of cities to the tour. Next, the training algorithm switches to the optimizer phase for optimizing the current tour by displacing the tour cities. After convergence in this phase, the training algorithm switches to the constructive phase anew and is continued until all cities are added to the tour. Furthermore, we investigate a relationship between the number of TSP cities and the number of cities to be added in each constructive phase. CONN was tested on nine sets of benchmark TSPs from TSPLIB to demonstrate its performance and efficiency. It performed better than several typical Neural networks (NNs), including KNIES_TSP_Local, KNIES_TSP_Global, Budinich's SOM, Co-Adaptive Net, and multivalued Hopfield network as wall as computationally comparable variants of the simulated annealing algorithm, in terms of both CPU time and accuracy. Furthermore, CONN converged considerably faster than expanding SOM and evolved integrated SOM and generated shorter tours compared to KNIES_DECOMPOSE. Although CONN is not yet comparable in terms of accuracy with some sophisticated computationally intensive algorithms, it converges significantly faster than they do. Generally speaking, CONN provides the best compromise between CPU time and accuracy among currently reported NNs for TSP.

  11. Network-Based Logistic Classification with an Enhanced L1/2 Solver Reveals Biomarker and Subnetwork Signatures for Diagnosing Lung Cancer

    Directory of Open Access Journals (Sweden)

    Hai-Hui Huang

    2015-01-01

    Full Text Available Identifying biomarker and signaling pathway is a critical step in genomic studies, in which the regularization method is a widely used feature extraction approach. However, most of the regularizers are based on L1-norm and their results are not good enough for sparsity and interpretation and are asymptotically biased, especially in genomic research. Recently, we gained a large amount of molecular interaction information about the disease-related biological processes and gathered them through various databases, which focused on many aspects of biological systems. In this paper, we use an enhanced L1/2 penalized solver to penalize network-constrained logistic regression model called an enhanced L1/2 net, where the predictors are based on gene-expression data with biologic network knowledge. Extensive simulation studies showed that our proposed approach outperforms L1 regularization, the old L1/2 penalized solver, and the Elastic net approaches in terms of classification accuracy and stability. Furthermore, we applied our method for lung cancer data analysis and found that our method achieves higher predictive accuracy than L1 regularization, the old L1/2 penalized solver, and the Elastic net approaches, while fewer but informative biomarkers and pathways are selected.

  12. Persistent homology of time-dependent functional networks constructed from coupled time series

    Science.gov (United States)

    Stolz, Bernadette J.; Harrington, Heather A.; Porter, Mason A.

    2017-04-01

    We use topological data analysis to study "functional networks" that we construct from time-series data from both experimental and synthetic sources. We use persistent homology with a weight rank clique filtration to gain insights into these functional networks, and we use persistence landscapes to interpret our results. Our first example uses time-series output from networks of coupled Kuramoto oscillators. Our second example consists of biological data in the form of functional magnetic resonance imaging data that were acquired from human subjects during a simple motor-learning task in which subjects were monitored for three days during a five-day period. With these examples, we demonstrate that (1) using persistent homology to study functional networks provides fascinating insights into their properties and (2) the position of the features in a filtration can sometimes play a more vital role than persistence in the interpretation of topological features, even though conventionally the latter is used to distinguish between signal and noise. We find that persistent homology can detect differences in synchronization patterns in our data sets over time, giving insight both on changes in community structure in the networks and on increased synchronization between brain regions that form loops in a functional network during motor learning. For the motor-learning data, persistence landscapes also reveal that on average the majority of changes in the network loops take place on the second of the three days of the learning process.

  13. Deciphering deterioration mechanisms of complex diseases based on the construction of dynamic networks and systems analysis

    Science.gov (United States)

    Li, Yuanyuan; Jin, Suoqin; Lei, Lei; Pan, Zishu; Zou, Xiufen

    2015-03-01

    The early diagnosis and investigation of the pathogenic mechanisms of complex diseases are the most challenging problems in the fields of biology and medicine. Network-based systems biology is an important technique for the study of complex diseases. The present study constructed dynamic protein-protein interaction (PPI) networks to identify dynamical network biomarkers (DNBs) and analyze the underlying mechanisms of complex diseases from a systems level. We developed a model-based framework for the construction of a series of time-sequenced networks by integrating high-throughput gene expression data into PPI data. By combining the dynamic networks and molecular modules, we identified significant DNBs for four complex diseases, including influenza caused by either H3N2 or H1N1, acute lung injury and type 2 diabetes mellitus, which can serve as warning signals for disease deterioration. Function and pathway analyses revealed that the identified DNBs were significantly enriched during key events in early disease development. Correlation and information flow analyses revealed that DNBs effectively discriminated between different disease processes and that dysfunctional regulation and disproportional information flow may contribute to the increased disease severity. This study provides a general paradigm for revealing the deterioration mechanisms of complex diseases and offers new insights into their early diagnoses.

  14. Research on Application of Network Theory of Supply and Demand in Enterprises in Reverse Logistics%供需网理论在企业逆向物流中的应用研究

    Institute of Scientific and Technical Information of China (English)

    郭群

    2015-01-01

    Network theory of supply and demand of improving enterprise reverse logistics system is an important way to realize the resource recycling and reuse of waste.From enterprises to implement reverse logistics challenges angle,analysis of the network theory of supply and demand of propulsion mechanism of enterprises to implement reverse logistics network,combined with the theory of supply and demand and the point of the theory of reverse logistics,and the enterprise,the implementation of reverse logistics management of the significance and the value,gives a positive,reverse logistics integration method and advantage,provide a reference for the node enterprises of supply and demand network implementation of reverse logistics.%供需网理论改进企业逆向物流系统是实现资源再生和废弃物再利用的一种重要方法。从企业实施逆向物流面临的挑战角度,分析了供需网理论推进企业实施逆向物流建设的机理,供需网理论与逆向物流理论的结合点,得出了企业实施逆向物流管理的意义及所带来的价值,给出了正、逆向物流整合方法及优势,为供需网节点企业实施逆向物流提供参考。

  15. A Novel Navigation Information Management System for Food Maritime Logistics Based on Internet of Things

    Directory of Open Access Journals (Sweden)

    Wei He

    2014-02-01

    Full Text Available This study focuses on the construction of a new navigation information management system for food maritime logistics. With the vigorous development of Internet technology, the Internet of things technology has been introduced into the food maritime logistics to enhance the efficiency of food production transportation. However, the navigation information management system for food maritime logistics is still a big challenge and very limited work has been done to address safe and effective navigation information management for food maritime logistics. For this reason, a novel navigation information management system based on Internet of things for food maritime logistics is presented in this study to achieve a variety of network data exchange and integration and build a set of information collection and transmission modules to process and share the information involved with the beacons, hydrology and environment. The navigation information management system could provide important information and decision for food maritime logistics to ensure their safety.

  16. Self-Construction of Aggregation Tree for Gathering Mobile Data in Wireless Sensor Network

    Science.gov (United States)

    Lee, Sangbin; Kim, Songmin; Kim, Sungjun; Ko, Doohyun; Kim, Bumjin; An, Sunshin

    A network of sensors can be used to obtain state based data from the area in which they are deployed. To reduce costs, the data sent via intermediate sensors to a sink are often aggregated. In this letter, we introduce Self-Construction of Aggregation Tree (SCAT) scheme which uses a novel data aggregation scheme utilizing the knowledge of the mobile node and the infrastructure (static node tree) in gathering the data from the mobile node. The static nodes can construct a near- optimal aggregation tree by themselves, using the knowledge of the mobile node, which is a process similar to forming the centralized aggregation tree.

  17. Simulating genetic networks made easy: network construction with simple building blocks.

    Science.gov (United States)

    Vercruysse, Steven; Kuiper, Martin

    2005-01-15

    We present SIM-plex, a genetic network simulator with a very intuitive interface in which a user can easily specify interactions as simple 'if-then' statements. The simulator is based on the mathematical model of Piecewise Linear Differential Equations (PLDEs). With PLDEs, genetic interactions are approximated as acting in a switch-like manner. The Java program, examples and a tutorial are available at http://www.psb.ugent.be/cbd/ {stcru,makui}@psb.ugent.be

  18. Analysis of Informationization Construction of Business Financial Management under the Network Economy

    Science.gov (United States)

    Dong, Yahui; Zhang, Pengwei; Li, Wei

    To strengthen the informationization construction of the financial management has great significance to the achievement of business management informationization, and under the network economic environment, it is an important task of the financial management that how to conduct informationization construction of traditional financial management to provide true, reliable and complete financial information system for the business managers. This paper thoroughly researches the problem of financial information orientation management (FIOM) by taking the method of combining theory with practice. This paper puts forward the thinking method of financial information management, makes the new contents of E-finance. At last, this paper rebuilds the system of finance internal control from four aspects such as control of organization and management, system development control and safety control of network system.

  19. CONSTRUCTION OF STRATEGIC CONNECTED DOMINATING SET FOR MOBILE AD HOC NETWORKS

    Directory of Open Access Journals (Sweden)

    Victor Ceronmani Sharmila

    2014-01-01

    Full Text Available Connected Dominating Sets (CDSs can serve as virtual backbones for wireless networks. A smaller virtual backbone (minimum size CDS incurs less communication overhead. Unfortunately, computing a minimum size CDS is NP-hard and thus many algorithms were developed which concentrates on how to construct smaller CDSs. Aiming for minimum number of nodes in CDS, results in CDSs that are highly unstable. Here we present four CDS algorithms which are constructed based on strategy, density, Threshold Neighborhood Distance Ratio (TNDR and velocity. Any node in the network can be a strategic node depending upon the application and need and will be selected as the starting node instead of the node with highest density which concentrates on minimum size CDS. Simulation methods are used to establish the efficiency of the proposed algorithm.

  20. Understanding IT-enabled social action networks: construction, sustainability, and user participation.

    Science.gov (United States)

    Banks, M Shane

    2012-01-01

    Innovative, humanitarian individuals and organizations are seeking to leverage the power of information technologies by constructing IT-enabled social action networks (ITSANs), networks of actors, connected via an IT platform, working together to improve social conditions and the lives of others. ITSANs are primarily web-based platforms that allow users to collaborate, share information, and pool resources to enhance efforts to address a common social mission. The goal of this research is to investigate how ITSANs are used to positively affect social needs by examining how these platforms are constructed and sustained. Also of interest are factors influencing user participation. To develop an in-depth understanding of ITSANs, this research proposes a qualitative multi-case study approach that seeks to understand ITSANs through the lived experiences of key actors.

  1. ON MULTICAST TREE CONSTRUCTION IN IPV4-IPV6 HYBRID NETWORK

    Institute of Scientific and Technical Information of China (English)

    Zhang Chao; Zhang Yuan; Huang Yongfeng; Li Xing

    2010-01-01

    With the IPv4 addresses exhausting and IPv6 emerging,the Peer-to-Peer (P2P) overlay is becoming increasingly heterogeneous and complex: pure IPv4,dual stack and pure IPv6 hosts coexist,and the connectivity limitation between IPv4 and IPv6 hosts requires the overlay protocols to be fit for this hybrid situation. This paper sets out to answer the question of how to construct multicast tree on top of IPv4-IPv6 hybrid network. Our solution is a New Greedy Algorithm (NGA) which eliminates the problem of joining failure in the hybrid network and keeps the efficiency of greedy algorithm in tree construction. Simulation results show that our algorithm has excellent performance,which is very close to the optimal in many cases.

  2. Design of Logistics Distribution Network for Fast Fashion Product%快速时尚品物流分销网络设计

    Institute of Scientific and Technical Information of China (English)

    刘思婧; 张锦; 李国旗

    2012-01-01

    针对快速时尚品在网络销售衰退期的配售问题,以收益最大化为目标,提出基于组配策略的快速时 尚品物流分销网络基本结构,并建立具有多产品组配和订单自取特点的非线性混合整数规划模型.引入产品组配的相关参数,实现不同组配率 下物流分销网络的整体优化.运用模拟退火算法对规划模型进行求解,结果表明,提高产品的组配率可增加产品销售总额以及降低物流总 成本.%This paper focuses on the tie-in-sale characteristic of fast fashion product in the degenerating period of e-commerce retailing. A non-liner mixed integer programming model for multi-product assembling and order taken by customer is proposed aiming at maximizing the profit of logistics distribution network for fast fashion product. By introducing the assembling parameter and the study of assembling solution, the integer optimization can be realized in different assembling rate. The model is solved by using simulated annealing algorithm, and results illustrate that the enhancement of the assembling rate not only can increase the gross sales, but also can decline the logistics cost.

  3. Constructing Long Short-Term Memory based Deep Recurrent Neural Networks for Large Vocabulary Speech Recognition

    OpenAIRE

    Li, Xiangang; Wu, Xihong

    2014-01-01

    Long short-term memory (LSTM) based acoustic modeling methods have recently been shown to give state-of-the-art performance on some speech recognition tasks. To achieve a further performance improvement, in this research, deep extensions on LSTM are investigated considering that deep hierarchical model has turned out to be more efficient than a shallow one. Motivated by previous research on constructing deep recurrent neural networks (RNNs), alternative deep LSTM architectures are proposed an...

  4. 国际化导向下外语院校物流管理专业实验室建设研究%Study on Construction of Logistics Laboratories Based on Internationalized Perspective in Foreign Language Colleges

    Institute of Scientific and Technical Information of China (English)

    陈伟; 杨柏

    2014-01-01

    The shortage of international logistics management talents has become the bottleneck of the development of China's logistics industry.Based on the international background ,with the training goal of foreign and application -oriented for logistics management talents , the comprehensive experimental platform with multilingual and 3D for international logistics is structured with the characteristics of foreign language colleges .Through the construction of the above platform , the practical operation ability of students can be improve in different context by the teaching mode change from the traditional such as books , blackboard to 3D simulation.%国际物流管理人才短缺的状况已成为制约我国物流产业发展的瓶颈。基于国际化背景,紧紧围绕涉外“应用型”高级物流管理专门人才的培养目标,构建起富有外语院校特色的多语言3D交互式国际物流综合实验平台,将传统的以书本、黑板为主的教学模式变革为以3D仿真为主寓教于乐的教学模式,以此来提升学生在不同语境下的实际操作能力。

  5. 河南省航空物流信息协同平台建设研究%Research on the Information Collaborative Platform Construction of Aviation Logistics in Henan Province

    Institute of Scientific and Technical Information of China (English)

    王小丽

    2014-01-01

    信息协同度低严重影响了河南省航空物流的快速发展。文中首先阐明了河南省航空物流信息协同的重要性,然后对河南航空物流信息平台现状进行分析,并指出了其中存在的主要问题。最后对河南省航空物流信息协同平台提出了相应的建设策略。%Low degree of information collaboration affects the rapid development of the aviation logistics seriously in Henan province.Firstly,this paper illustrates the importance of aviation logistics information collaboration in Henan province ,and then analyzes the status of aviation logistics information platform in Henan ,and points out the main problems.Finally,it puts forward the corresponding strategies of constructing the information collaboration platform on aviation logistics in Henan province .

  6. The Construct Course and Safety in Military Logistics System Based on RFID Technology%基于RFID技术的军事物流系统构建流程与安全

    Institute of Scientific and Technical Information of China (English)

    邵永哲; 杨健; 李小将; 李新念

    2009-01-01

    Firstly, the barcode technology and the Radio Fre-quency Identification (RFID) technology are introduced and the RFID will replace the bar code technology in the logistics' field in the future. Secondly, the RFID application in the in-ternational military logistics filed is analyzed and the applied ideas for our army are put forward. Then, the construct course of military logistics system based on RFID technology is de-signed. Finally, the circulation safety and protection measures are discussed. Some references of the application of the RFID technology in military logistics filed are supplied.%文章首先介绍了务码技术和RFID技术,论证了RFID技术代替条码技术的必然,其次分析RFID技术在国外军事物流领域的应用,提出了我军的应用思路,然后设计了基于RFID技术军事物流系统的构建流程,最后讨论了其流通安全及防护措施.为RFID技术在军事物流领域的应用提供了参考.

  7. Design principles for the analysis and construction of robustly homeostatic biological networks.

    Science.gov (United States)

    Tang, Zhe F; McMillen, David R

    2016-11-07

    Homeostatic biological systems resist external disturbances, allowing cells and organisms to maintain a constant internal state despite perturbations from their surroundings. Many biological regulatory networks are known to act homeostatically, with examples including thermal adaptation, osmoregulation, and chemotaxis. Understanding the network topologies (sets of regulatory interactions) and biological parameter regimes that can yield homeostasis in a biological system is of interest both for the study of natural biological system, and in the context of designing new biological control schemes for use in synthetic biology. Here, we examine the mathematical properties of a function that maps a biological system's inputs to its outputs, we have formulated a novel criterion (the "cofactor condition") that compactly describes the conditions for homeostasis. We further analyze the problem of robust homeostasis, wherein the system is required to maintain homeostatic behavior when its parameter values are slightly altered. We use the cofactor condition to examine previously reported examples of robust homeostasis, showing that it is a useful way to unify a number of seemingly different analyses into a single framework. Based on the observation that all previous robustly homeostatic examples fall into one of three classes, we propose a "strong cofactor condition" and use it to provide an algorithm for designing new robustly homeostatic biological networks, giving both their topologies and constraints on their parameter values. Applying the design algorithm to a three-node biological network, we construct several robustly homeostatic genetic networks, uncovering network topologies not previously identified as candidates for exhibiting robust homeostasis.

  8. Efficient Geo-Computational Algorithms for Constructing Space-Time Prisms in Road Networks

    Directory of Open Access Journals (Sweden)

    Hui-Ping Chen

    2016-11-01

    Full Text Available The Space-time prism (STP is a key concept in time geography for analyzing human activity-travel behavior under various Space-time constraints. Most existing time-geographic studies use a straightforward algorithm to construct STPs in road networks by using two one-to-all shortest path searches. However, this straightforward algorithm can introduce considerable computational overhead, given the fact that accessible links in a STP are generally a small portion of the whole network. To address this issue, an efficient geo-computational algorithm, called NTP-A*, is proposed. The proposed NTP-A* algorithm employs the A* and branch-and-bound techniques to discard inaccessible links during two shortest path searches, and thereby improves the STP construction performance. Comprehensive computational experiments are carried out to demonstrate the computational advantage of the proposed algorithm. Several implementation techniques, including the label-correcting technique and the hybrid link-node labeling technique, are discussed and analyzed. Experimental results show that the proposed NTP-A* algorithm can significantly improve STP construction performance in large-scale road networks by a factor of 100, compared with existing algorithms.

  9. An instruction language for self-construction in the context of neural networks

    Directory of Open Access Journals (Sweden)

    Frederic eZubler

    2011-12-01

    Full Text Available Biological systems are based on an entirely different concept of construction than human artifacts. They construct themselves by a process of self-organization that is a systematic spatio-temporal generation of, and interaction between, various specialized cell types. We propose a framework for designing gene-like codes for guiding the self-construction of neural networks. The description of neural development is formalized by defining a set of primitive actions taken locally by neural precursors during corticogenesis. These primitives can be combined into networks of instructions similar to biochemical pathways, capable of reproducing complex developmental sequences in a biologically plausible way. Moreover, the conditional activation and deactivation of these instruction networks can also be controlled by these primitives, allowing for the design of a `genetic code' containing both coding and regulating elements. We demonstrate in a simulation of physical cell development how this code can be incorporated into a single progenitor, which then by replication and differentiation, reproduces important aspects of corticogenesis.

  10. An instruction language for self-construction in the context of neural networks.

    Science.gov (United States)

    Zubler, Frederic; Hauri, Andreas; Pfister, Sabina; Whatley, Adrian M; Cook, Matthew; Douglas, Rodney

    2011-01-01

    Biological systems are based on an entirely different concept of construction than human artifacts. They construct themselves by a process of self-organization that is a systematic spatio-temporal generation of, and interaction between, various specialized cell types. We propose a framework for designing gene-like codes for guiding the self-construction of neural networks. The description of neural development is formalized by defining a set of primitive actions taken locally by neural precursors during corticogenesis. These primitives can be combined into networks of instructions similar to biochemical pathways, capable of reproducing complex developmental sequences in a biologically plausible way. Moreover, the conditional activation and deactivation of these instruction networks can also be controlled by these primitives, allowing for the design of a "genetic code" containing both coding and regulating elements. We demonstrate in a simulation of physical cell development how this code can be incorporated into a single progenitor, which then by replication and differentiation, reproduces important aspects of corticogenesis.

  11. Construction of Cross-strait Cold-chain Logistics System and Development of Agricultural Products Trade%两岸冷链物流体系构建与农产品贸易发展

    Institute of Scientific and Technical Information of China (English)

    陈晓波

    2012-01-01

    Under the impetus of implementation of Economic Cooperation Framework Agreement(ECFA),cross-strait agricultural products trade will be further expanded.However,the development of mainland cold-chain logistics is lagging relatively,which made agricultural products lose seriously in the circulation and hinder the further development of cross-strait agricultural trade.The development levels of cross-strait cold-chain logistics are different,but they have the same stronger complementary.To ensure the better and faster development of cross-strait agricultural products trade,both sites should build cold-chain logistics system through constructing cold-chain logistics mode based on supply chain,integrating the cross-strait cold-chain logistics resources,building cross-strait cold-chain logistics information platform,researching and developing cold-chain logistics technology,and training cold-chain logistics talents together.%在海峡两岸经济合作框架协议(ECFA)实施的推动下,两岸农产品贸易将进一步扩大,然而大陆冷链物流发展相对滞后,农产品在流通中损失严重,给两岸农产品贸易的进一步发展造成一定的障碍。两岸冷链物流发展程度不同,但是具有较强的互补性,两岸物流业可以从构建基于供应链的冷链物流模式、整合两岸冷链物流资源、建设两岸冷链物流信息平台、共同研发冷链物流技术、共同培养冷链物流人才等方面出发,共建冷链物流体系,确保两岸农产品贸易更好更快地发展。

  12. Projects Management Mode of Highway Construction Based on the Concept of Logistics%基于物流理念的公路建设项目管理模式

    Institute of Scientific and Technical Information of China (English)

    杨庆云; 吴彦芳

    2011-01-01

    基于物流理念的单项Partnering模式的建设项目供应链是一种从全局观点出发,以项目整体利益最大化为目标,体现双赢的规则及相互信任的合作精神,通过对信息流,物流,资金流的控制,以项目时间、成本、质量、范围、采购等各种项目专项管理的协调与整合为主要内容,将业主、设计方、施工方、物流公司等连成一个整体的模式.%Construction project supply chain of single Partnering mode based on the logistics concept is a kind of pattern that starts from a global perspective, takes maximizing the overall interests of the project as the objective, reflects the win-win rules and the spirit of cooperation and mutual trust,through the control of information flow, logistics, capital flow, takes the coordination and integration of project time, cost, quality, scope, procurement and other projects special management as the main content, and integrates the owner, designer, construction side and logistics companies.

  13. Distributed Algorithm for Constructing Efficient Tree Topology for Message Dissemination in Vehicular Networks

    Directory of Open Access Journals (Sweden)

    S. Kamakshi

    2014-01-01

    Full Text Available Vehicular ad hoc network is an ad hoc network constituted among moving vehicles that have wireless dedicated short range communication (DSRC devices in order to provide ubiquitous connectivity even if the road-side infrastructure is unavailable. Message dissemination in vehicular ad hoc networks is necessary for exchanging information about prevailing traffic information, so that the vehicles can take alternate routes to avoid traffic jam. A major challenge in broadcast protocols is that they result in flooding of messages that reduce the speed of dissemination due to collision. Dissemination of messages using tree topology reduces the number of rebroadcasts. Dynamicity Aware Graph Relabeling System model provides a framework to construct spanning tree in mobile wireless network. In this paper, we propose a new distributed algorithm for constructing an arbitrary spanning tree based on Dynamicity Aware Graph Relabeling System model, which develops a maximum leaf spanning tree in order to reduce the number of rebroadcasts and dissemination time. Our simulation results prove that the number of vehicles rebroadcasting the message is curtailed to 15% and the dissemination time required to achieve 100% reachability is curtailed by 10% under average vehicle density.

  14. Approximating the Behaviours of Physarum polycephalum for the Construction and Minimisation of Synthetic Transport Networks

    Science.gov (United States)

    Jones, Jeff

    The single celled organism Physarum polycephalum efficiently constructs and minimises dynamical nutrient transport networks resembling proximity graphs. We present a model multi-agent population which collectively approximates the network behaviours of Physarum. We demonstrate spontaneous transport network formation and evolution and show that the collective population also exhibits quasi-physical emergent properties, allowing the collective population to be considered as a virtual computing material - a synthetic plasmodium. This material is used as an unconventional method to approximate spatially represented geometry problems. We demonstrate three different methods for the construction, evolution and minimisation of Physarum-like transport networks which approximate Steiner trees, relative neighbourhood graphs, convex hulls and concave hulls. The results span the Toussaint hierarchy of proximity graphs, suggesting that the foraging and minimising behaviours of Physarum reflect interplay between maximising foraging area and minimising transport distance. The properties and behaviours of the synthetic virtual plasmodium may be useful in future physical instances of unconventional computing devices, and may also provide clues to the generation of emergent computation behaviours by Physarum.

  15. Experiment and simulation study on construction of a three-dimensional network model

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The construction of a network model is one of the key techniques in organic com-bination of microscopic flow experiment and simulation. The construction method of a three-dimensional network model is presented on the basis of CT scanning images in this paper. A series of CT slice images describing microscopic pore structure and fluid distribution of actual rock is obtained with the help of the in-dustrial microfocus CT system. Based on the extraction of pore space skeleton, pore and throat information, the corresponding network model is established, and the conversion from three-dimensional CT image information to pore-throat size distribution and topological information is also achieved. The feature of this me-thod lies in the fact that complicated pore space of rock may be characterized by pores and throats with a simple shape while keeping the geometry and flow char-acteristics. It is indicated that the calculated results of porosity, permeability, rela-tive permeability curve and microscopic remaining oil distribution match very well the experimental results of water flooding and polymer flooding. This network model may fairly well characterize the rock microscopic pore-throat size and topo-logical characteristics.

  16. Early-life exposure to caffeine affects the construction and activity of cortical networks in mice.

    Science.gov (United States)

    Fazeli, Walid; Zappettini, Stefania; Marguet, Stephan Lawrence; Grendel, Jasper; Esclapez, Monique; Bernard, Christophe; Isbrandt, Dirk

    2017-09-01

    The consumption of psychoactive drugs during pregnancy can have deleterious effects on newborns. It remains unclear whether early-life exposure to caffeine, the most widely consumed psychoactive substance, alters brain development. We hypothesized that maternal caffeine ingestion during pregnancy and the early postnatal period in mice affects the construction and activity of cortical networks in offspring. To test this hypothesis, we focused on primary visual cortex (V1) as a model neocortical region. In a study design mimicking the daily consumption of approximately three cups of coffee during pregnancy in humans, caffeine was added to the drinking water of female mice and their offspring were compared to control offspring. Caffeine altered the construction of GABAergic neuronal networks in V1, as reflected by a reduced number of somatostatin-containing GABA neurons at postnatal days 6-7, with the remaining ones showing poorly developed dendritic arbors. These findings were accompanied by increased synaptic activity in vitro and elevated network activity in vivo in V1. Similarly, in vivo hippocampal network activity was altered from the neonatal period until adulthood. Finally, caffeine-exposed offspring showed increased seizure susceptibility in a hyperthermia-induced seizure model. In summary, our results indicate detrimental effects of developmental caffeine exposure on mouse brain development. Copyright © 2017 Elsevier Inc. All rights reserved.

  17. Logistics sprawl in Los Angeles

    OpenAIRE

    DABLANC, Laetitia

    2013-01-01

    'Logistics sprawl' is the spatial deconcentration of logistics facilities and distribution centers in metropolitan areas. It has been a dominant spatial pattern for the last decades in metropolitan areas of developed countries. Starting in the 1980s, the U.S. and many other parts of the world entered a 'new distribution economy' (Hesse and Rodrigue, 2004), an economy largely dependent upon efficient and increasingly globalized networks of goods distribution and just-in-time operations. This h...

  18. Paving the Way Towards Reactive Planar Spanner Construction in Wireless Networks

    Science.gov (United States)

    Frey, Hannes; Rührup, Stefan

    A spanner is a subgraph of a given graph that supports the original graph's shortest path lengths up to a constant factor. Planar spanners and their distributed construction are of particular interest for geographic routing, which is an efficient localized routing scheme for wireless ad hoc and sensor networks. Planarity of the network graph is a key criterion for guaranteed delivery, while the spanner property supports efficiency in terms of path length. We consider the problem of reactive local spanner construction, where a node's local topology is determined on demand. Known message-efficient reactive planarization algorithms do not preserve the spanner property, while reactive spanner constructions with a low message overhead have not been described so far. We introduce the concept of direct planarization which may be an enabler of efficient reactive spanner construction. Given an edge, nodes check for all incident intersecting edges a certain geometric criterion and withdraw the edge if this criterion is not satisfied. We use this concept to derive a generic reactive topology control mechanism and consider two geometric criteria. Simulation results show that direct planarization increases the performance of localized geographic routing by providing shorter paths than existing reactive approaches.

  19. A review of integration strategies to support gene regulatory network construction.

    Science.gov (United States)

    Chen, Hailin; VanBuren, Vincent

    2012-01-01

    Gene regulatory network (GRN) construction is a central task of systems biology. Integration of different data sources to infer and construct GRNs is an important consideration for the success of this effort. In this paper, we will discuss distinctive strategies of data integration for GRN construction. Basically, the process of integration of different data sources is divided into two phases: the first phase is collection of the required data and the second phase is data processing with advanced algorithms to infer the GRNs. In this paper these two phases are called "structural integration" and "analytic integration," respectively. Compared with the nonintegration strategies, the integration strategies perform quite well and have better agreement with the experimental evidence.

  20. A Review of Integration Strategies to Support Gene Regulatory Network Construction

    Directory of Open Access Journals (Sweden)

    Hailin Chen

    2012-01-01

    Full Text Available Gene regulatory network (GRN construction is a central task of systems biology. Integration of different data sources to infer and construct GRNs is an important consideration for the success of this effort. In this paper, we will discuss distinctive strategies of data integration for GRN construction. Basically, the process of integration of different data sources is divided into two phases: the first phase is collection of the required data and the second phase is data processing with advanced algorithms to infer the GRNs. In this paper these two phases are called “structural integration” and “analytic integration,” respectively. Compared with the nonintegration strategies, the integration strategies perform quite well and have better agreement with the experimental evidence.

  1. Mining for constructions in texts using N-gram and network analysis

    DEFF Research Database (Denmark)

    Shibuya, Yoshikata; Jensen, Kim Ebensgaard

    2015-01-01

    N-gram analysis to Lewis Carroll's novel Alice's Adventures in Wonderland and Mark Twain's novelThe Adventures of Huckleberry Finn and extrapolate a number of likely constructional phenomena from recurring N-gram patterns in the two texts. In addition to simple N-gram analysis, the following...... satisfactorily via introspection, there is a need for different ways of identifying constructions in language use. In this paper, we will explore the extent to which the N-gram information retrieval technique – which has seen use in phraseological analysis, discourse analysis, register characterization...... will be applied: comparative N-gram analysis which draws on a slightly adjusted distinctive collexeme analysis, hierarchical agglomerative cluster analysis, and N-gram-based network analysis. The latter is explored as a way to capture different N-gram types, and underlying constructions, in one representation...

  2. A computational model for the item-based induction of construction networks.

    Science.gov (United States)

    Gaspers, Judith; Cimiano, Philipp

    2014-04-01

    According to usage-based approaches to language acquisition, linguistic knowledge is represented in the form of constructions--form-meaning pairings--at multiple levels of abstraction and complexity. The emergence of syntactic knowledge is assumed to be a result of the gradual abstraction of lexically specific and item-based linguistic knowledge. In this article, we explore how the gradual emergence of a network consisting of constructions at varying degrees of complexity can be modeled computationally. Linguistic knowledge is learned by observing natural language utterances in an ambiguous context. To determine meanings of constructions starting from ambiguous contexts, we rely on the principle of cross-situational learning. While this mechanism has been implemented in several computational models, these models typically focus on learning mappings between words and referents. In contrast, in our model, we show how cross-situational learning can be applied consistently to learn correspondences between form and meaning beyond such simple correspondences.

  3. Logistics Sourcing Strategies in Supply Chain Design

    OpenAIRE

    LIU, LIWEN

    2007-01-01

    A company's logistics sourcing strategy determines whether it structures and organizeslogistics within the company or company group or integrates logistics upstream and downstreamin the supply chain. First, three different types of logistics sourcing strategies in supply chaindesign are described and the theoretical background for the development of these strategies,including both transaction cost theory and network theory, is analyzed. Two special casesabout logistics sourcing strategy decis...

  4. New PBO GPS Station Construction: Eastern Region Network Enhancements and Multiple-Monument Stability Comparisons

    Science.gov (United States)

    Dittmann, S. T.; Austin, K. E.; Berglund, H. T.; Blume, F.; Feaux, K.; Mann, D.; Mattioli, G. S.; Walls, C. P.

    2013-12-01

    The Plate Boundary Observatory (PBO) network consists of 1100 continuously operating, permanent GPS stations throughout the United States. The majority of this network was constructed using NSF-MREFC funding as part of the EarthScope Project during FY2003-FY2008. Since FY2009, UNAVCO has operated and maintained PBO through a Cooperative Agreement (CA) with NSF. Construction of new, permanent GPS monuments in the PBO network was the result of two change orders to the original PBO O&M CA. Change Order 33 (CO33) allocated funds to construct additional GPS stations at six locations in the Eastern Region of PBO. Three of these locations were designed to replace poorly performing existing GPS monuments in Georgia, Texas and New York. The remaining three new locations were selected to fill in gaps in network coverage in Pennsylvania, Wisconsin and North Dakota. Construction of all six new sites was completed in September 2013. Important scientific goals for CO33 include improvement of the stable North American reference frame, measurement of the vertical signal associated with the Glacial Isostatic Adjustment, and improved constraints on surface deformation and possible earthquakes, which occur in the low-strain tectonic setting of the eastern North American Plate. Change Order 35 (CO35) allocated funds to construct two additional geodetic monuments at five existing PBO stations in order to test and compare the long-term stability of various monument designs under near-identical geologic conditions. Sites were chosen to yield a variety of geographic, hydrologic and geologic conditions, including both fine-grained alluvium and crystalline bedrock. At each location, three different monuments (deep drill braced, short drill braced/driven-braced, mast/pillar) were built with 10 meter spacing, with shared power systems and data telemetry infrastructure. Construction of these multi-monument test locations began in October 2012 and finished in September 2013. See G010- Berglund

  5. 南京长江航运国际物流中心发展研究%Study on Development and Countermeasures Research of Constructing Nanjing Yangtze River International Logistics Center

    Institute of Scientific and Technical Information of China (English)

    胡林凤; 王鹏

    2015-01-01

    Nanjing is an important comprehensive transportation junction and logistics nodes city in China.Port of Nanjing as the destination of ten thousand tons sea vessel entering the river,as the first class port opening door to the outside,and as the internationality,multifunc-tion,integrated main pivotal port in Yangtze River Basin which transfer from river to ocean, she has the foundation and potential to become the Yangtze River international shipping logis-tics center.Under the background of the government to accelerate the development of the Yangtze River Economic Belt,this paper analyzes the challenge and opportunity to construct Nanjing Yangtze River international logistics center,and puts forward some relevant counter-measures and recommendation in order to provide reference to speed up the pace to construct the Nanjing Yangtze River international logistics center.%南京是全国重要的综合交通枢纽和物流节点城市。南京港是万吨级海轮进江的终点和对外开放一类口岸,也是长江流域国际性、多功能、综合型江海转运主枢纽港,具有打造长江航运国际物流中心的基础和潜力。在国家加快推动长江经济带发展背景下,分析了建立南京长江航运国际物流中心的机遇与挑战,提出了相应的对策,以期对加快建立南京长江航运国际物流中心具有一定的指导意义。

  6. Construction of asymptotically optimal control for crisscross network from a free boundary problem

    Directory of Open Access Journals (Sweden)

    Amarjit Budhiraja

    2016-12-01

    Full Text Available An asymptotic framework for optimal control of multiclass stochastic processing networks, using formal diffusion approximations under suitable temporal and spatial scaling, by Brownian control problems (BCP and their equivalent workload formulations (EWF, has been developed by Harrison (1988. This framework has been implemented in many works for constructing asymptotically optimal control policies for a broad range of stochastic network models. To date all asymptotic optimality results for such networks correspond to settings where the solution of the EWF is a reflected Brownian motion in $\\mathbb{R} _{+}$ or a wedge in $\\mathbb{R} _{+}^{2}$. In this work we consider a well studied stochastic network which is perhaps the simplest example of a model with more than one dimensional workload process. In the regime considered here, the singular control problem corresponding to the EWF does not have a simple form explicit solution. However, by considering an associated free boundary problem one can give a representation for an optimal controlled process as a two dimensional reflected Brownian motion in a Lipschitz domain whose boundary is determined by the solution of the free boundary problem. Using the form of the optimal solution we propose a sequence of control policies, given in terms of suitable thresholds, for the scaled stochastic network control problems and prove that this sequence of policies is asymptotically optimal. As suggested by the solution of the EWF, the policy we propose requires a server to idle under certain conditions which are specified in terms of thresholds determined from the free boundary.

  7. A GENETIC ALGORITHM FOR CONSTRUCTING BROADCAST TREES WITH COST AND DELAY CONSTRAINTS IN COMPUTER NETWORKS

    Directory of Open Access Journals (Sweden)

    Ahmed Y. Hamed

    2015-01-01

    Full Text Available We refer to the problem of constructing broadcast trees with cost and delay constraints in the networks as a delay-constrained minimum spanning tree problem in directed networks. Hence it is necessary determining a spanning tree of minimal cost to connect the source node to all nodes subject to delay constraints on broadcast routing. In this paper, we proposed a genetic algorithm for solving broadcast routing by finding the low-cost broadcast tree with minimum cost and delay constraints. In this research we present a genetic algorithm to find the broadcast routing tree of a given network in terms of its links. The algorithm uses the connection matrix of the given network to find the spanning trees and considers the weights of the links to obtain the minimum spanning tree. Our proposed algorithm is able to find a better solution, fast convergence speed and high reliability. The scalability and the performance of the algorithm with increasing number of network nodes are also encouraging.

  8. Feasibility assessment of path-planning for pipeline system construction of electric utilities network enhancement

    Energy Technology Data Exchange (ETDEWEB)

    Lin, C.C.; Huang, S.J. [National Cheng Kung Univ., Tainan, Taiwan (China). Dept. of Electrical Engineering

    2007-07-01

    This paper proposed an algorithm to improve the power transmission network in Taiwan which has experienced increased competition since the addition of competitive local exchange carriers (CLEC) into the telecommunication market. Recently, the CLECs requested to rent pipelines from the original incumbent local exchange carriers (ILECs) and from the Taiwan Power Company. The Taiwan Power Company not only builds transmission lines, but also telecommunication networks using different kinds of fiber optic cables, including Optical Power Ground Wire (OPGW), All-Dielectric Self-Supporting (ADSS), and Wrapped types (WOC). This paper also discussed the integration of pipeline rent-out work with AM/FM/geographic information system software. The Java-based software determines a shortest path-planning method for the piping layout to help improve the pipeline system and the construction of an electricity network. The method is expected to increase the use of existing pipelines by improving the efficiency of network planning and maintenance. The method also reduces the potential for design faults and is easy to apply in the field due to the clear criteria. This paper described the proposed system architecture in detail and presented test results. It was shown that the use of a shortest path for the piping layout can reduce the distance between manholes in the huge network. According to test results, the proposed method is considered to be feasible. 11 refs., 2 tabs., 10 figs.

  9. The Research on Construction of Xiangning Coal Company Modern Coal Trade Logistics System%乡宁煤销公司现代煤炭贸易物流体系建设

    Institute of Scientific and Technical Information of China (English)

    李庆

    2014-01-01

    As The research on construction of XiangNing coal company modern coal trade logistics system is a heavy issue,the author should master clear thinking,scientific method,and multi-disciplinary knowledge. In this text the author upheld the guiding role of Modern scientific logistics theory,adhered to orientation of the linking theory with practice,and applied the means of document study,comparative analysis,and combination of emphasis study and or-dinary study. In this paper,the author has carried on the preliminary discussion about the XiangNing coal company coal trade modern logistics system and focuses on the connotation of modern logistics system of coal trade,constitu-ent elements,XiangNing company to establish the importance of modern logistics system of coal trade,the advanta-ges and challenges facing and XiangNing coal company to establish the strategic way of modern logistics system of coal trade. Pin to the scientific outlook on development,according to the shanxi coal group to build logistics industry"big MAC" strategic thinking and linfen pin coal logistics industry development planning strategy,continue to change business ideas,innovative business model,stick to the"market-oriented operation,modern logistics" two big priorities,entity project as the gripper,guided by the market rules,on the basis of controlling logistics cost,with the goal of maximizing the benefits,specialization,market-oriented logistics development road .%采用文献研究、比较分析、重点研究与一般研究相结合等研究方法,对乡宁煤销公司现代煤炭贸易物流体系进行了探讨,重点研究了现代煤炭贸易物流体系的研究背景、乡宁公司建立现代煤炭贸易物流体系的重要意义、面临的有利条件和挑战以及乡宁煤销公司建立现代煤炭贸易物流体系的战略途径。以科学发展观为统领,按照山西煤销集团打造物流产业“巨无霸”的战略思路和临汾煤销物流产业发展规划

  10. 生态文明型物流发展策略%On Strategy for Eco-Friendly Logistics Business

    Institute of Scientific and Technical Information of China (English)

    梁爱文

    2015-01-01

    In order to adapt to China’s economic“new normality”,China’s logistics industry is entering the development phase of“new normality”,logistics industry “new normality”brought the development of ecological civilization logistics with both great challenges and opportunities. Ecological civilization logistics is the development trend of modern logistics, which includes basic development mode of logistics reduction, logistics cycle, logistics green, logistics low-carbon, China needs to strengthen the system construction and policy guidance, construct network system of logistics infrastructure, build the support system of science and technology, structure propaganda education and talent cultivation system for guarantee the development of ecological civilization logistics.%生态文明型物流是现代物流的发展趋势,它包括物流循环化、物流减量化、物流绿色化、物流低碳化等基本发展模式。要通过加强制度建设和政策引导,注重基础设施和网络信息化建构,深化科技共同研发与协同创新,强化宣传教育与人才培养等路径来保障生态文明型物流的发展。

  11. Construction of biological networks from unstructured information based on a semi-automated curation workflow.

    Science.gov (United States)

    Szostak, Justyna; Ansari, Sam; Madan, Sumit; Fluck, Juliane; Talikka, Marja; Iskandar, Anita; De Leon, Hector; Hofmann-Apitius, Martin; Peitsch, Manuel C; Hoeng, Julia

    2015-06-17

    atherosclerotic plaque destabilization network that was generated is a causal network model for vascular disease demonstrating the usefulness of the workflow for knowledge extraction and construction of mechanistically meaningful biological networks. © The Author(s) 2015. Published by Oxford University Press.

  12. Brain without anatomy: construction and comparison of fully network-driven structural MRI connectomes.

    Directory of Open Access Journals (Sweden)

    Olga Tymofiyeva

    Full Text Available MRI connectomics methods treat the brain as a network and provide new information about its organization, efficiency, and mechanisms of disruption. The most commonly used method of defining network nodes is to register the brain to a standardized anatomical atlas based on the Brodmann areas. This approach is limited by inter-subject variability and can be especially problematic in the context of brain maturation or neuroplasticity (cerebral reorganization after brain damage. In this study, we combined different image processing and network theory methods and created a novel approach that enables atlas-free construction and connection-wise comparison of diffusion MRI-based brain networks. We illustrated the proposed approach in three age groups: neonates, 6-month-old infants, and adults. First, we explored a data-driven method of determining the optimal number of equal-area nodes based on the assumption that all cortical areas of the brain are connected and, thus, no part of the brain is structurally isolated. Second, to enable a connection-wise comparison, alignment to a "reference brain" was performed in the network domain within each group using a matrix alignment algorithm with simulated annealing. The correlation coefficients after pair-wise network alignment ranged from 0.6102 to 0.6673. To test the method's reproducibility, one subject from the 6-month-old group and one from the adult group were scanned twice, resulting in correlation coefficients of 0.7443 and 0.7037, respectively. While being less than 1 due to parcellation and noise, statistically, these values were significantly higher than inter-subject values. Rotation of the parcellation largely explained the variability. Through the abstraction from anatomy, the developed framework allows for a fully network-driven analysis of structural MRI connectomes and can be applied to subjects at any stage of development and with substantial differences in cortical anatomy.

  13. Construction and evaluation of yeast expression networks by database-guided predictions

    Directory of Open Access Journals (Sweden)

    Katharina Papsdorf

    2016-05-01

    Full Text Available DNA-Microarrays are powerful tools to obtain expression data on the genome-wide scale. We performed microarray experiments to elucidate the transcriptional networks, which are up- or down-regulated in response to the expression of toxic polyglutamine proteins in yeast. Such experiments initially generate hit lists containing differentially expressed genes. To look into transcriptional responses, we constructed networks from these genes. We therefore developed an algorithm, which is capable of dealing with very small numbers of microarrays by clustering the hits based on co-regulatory relationships obtained from the SPELL database. Here, we evaluate this algorithm according to several criteria and further develop its statistical capabilities. Initially, we define how the number of SPELL-derived co-regulated genes and the number of input hits influences the quality of the networks. We then show the ability of our networks to accurately predict further differentially expressed genes. Including these predicted genes into the networks improves the network quality and allows quantifying the predictive strength of the networks based on a newly implemented scoring method. We find that this approach is useful for our own experimental data sets and also for many other data sets which we tested from the SPELL microarray database. Furthermore, the clusters obtained by the described algorithm greatly improve the assignment to biological processes and transcription factors for the individual clusters. Thus, the described clustering approach, which will be available through the ClusterEx web interface, and the evaluation parameters derived from it represent valuable tools for the fast and informative analysis of yeast microarray data.

  14. 高职院校港航集装箱物流实训系统体系构建研究%Research on System Construction of Port and Shipping Container Logistics Training System in Higher Vocational Colleges

    Institute of Scientific and Technical Information of China (English)

    张莹; 宋志强; 陈斌

    2015-01-01

    Port and shipping container logistics knowledge and skills of employees is to determine the key to development of the logistics industry and do knowledge,technical skills and practical ability of practitioners to ensure that port and shipping containers theory is to ensure the steady development of the logistics industry.In this paper questionnaire investigation to analyze the skills and quality of the logistics business and social status of employees,analyzed from the basics,business skills and quality of the industry,he pointed out the logistics practitioners skills and knowledge requirements.Finally,to ensure the dual training knowledge and skills of the premise of the port and shipping container logistics staff skills training goal has never been discussed , higher vocational colleges of logistics personnel skills development programs and systems will be discussed.Through research,with a view to better understand the problems in the construction industry professionals,proposed training program targeted.%高职院校教学实训系统建设是加强高职学生实践能力锻炼,培养学生在基础理论认知、专业技术技能协调发展的保证,也是国家对职业教育发展提出的要求。港航集装箱物流实训系统是高职培养港航物流专业人才的重要基础,文中从实训系统功能入手,分析了实训系统建设要求以及体系功能,在此基础上建立了基础、核心、管理、保障和支撑位一体的实训系统体系框架,并对各个体系模块进行了功能设计。通过系统体系框架构建,形成科学规范的实训系统建设、管理方案,以便更好的发挥实训系统效能,培养适应职业发展需要的人才队伍。

  15. Analysis of regulatory networks constructed based on gene coexpression in pituitary adenoma.

    Science.gov (United States)

    Gong, Jie; Diao, Bo; Yao, Guo Jie; Liu, Ying; Xu, Guo Zheng

    2013-12-01

    Gene coexpression patterns can reveal gene collections with functional consistency. This study systematically constructs regulatory networks for pituitary tumours by integrating gene coexpression, transcriptional and posttranscriptional regulation. Through network analysis, we elaborate the incidence mechanism of pituitary adenoma. The Pearson's correlation coefficient was utilized to calculate the level of gene coexpression. By comparing pituitary adenoma samples with normal samples, pituitary adenoma-specific gene coexpression patterns were identified. For pituitary adenoma-specific coexpressed genes, we integrated transcription factor (TF) and microRNA (miRNA) regulation to construct a complex regulatory network from the transcriptional and posttranscriptional perspectives. Network module analysis identified the synergistic regulation of genes by miRNAs and TFs in pituitary adenoma. We identified 142 pituitary adenoma-specific active genes, including 43 TFs and 99 target genes of TFs. Functional enrichment of these 142 genes revealed that the occurrence of pituitary adenoma induced abnormalities in intracellular metabolism and angiogenesis process. These 142 genes were also significantly enriched in adenoma pathway. Module analysis of the systematic regulatory network found that three modules contained elements that were closely related to pituitary adenoma, such as FGF2 and SP1, as well as transcription factors and miRNAs involved in the tumourigenesis. These results show that in the occurrence of pituitary adenoma, miRNA, TF and genes interact with each other. Based on gene expression, the proposed method integrates interaction information from different levels and systematically explains the occurrence of pituitary tumours. It facilitates the tracing of the origin of the disease and can provide basis for early diagnosis of complex diseases or cancer without obvious symptoms.

  16. Analysis of regulatory networks constructed based on gene coexpression in pituitary adenoma

    Indian Academy of Sciences (India)

    Jie Gong; Bo Diao; Guo Jie Yao; Ying Liu; Guo Zheng Xu

    2013-12-01

    Gene coexpression patterns can reveal gene collections with functional consistency. This study systematically constructs regulatory networks for pituitary tumours by integrating gene coexpression, transcriptional and posttranscriptional regulation. Through network analysis, we elaborate the incidence mechanism of pituitary adenoma. The Pearson’s correlation coefficient was utilized to calculate the level of gene coexpression. By comparing pituitary adenoma samples with normal samples, pituitary adenoma-specific gene coexpression patterns were identified. For pituitary adenoma-specific coexpressed genes, we integrated transcription factor (TF) and microRNA (miRNA) regulation to construct a complex regulatory network from the transcriptional and posttranscriptional perspectives. Network module analysis identified the synergistic regulation of genes by miRNAs and TFs in pituitary adenoma. We identified 142 pituitary adenoma-specific active genes, including 43 TFs and 99 target genes of TFs. Functional enrichment of these 142 genes revealed that the occurrence of pituitary adenoma induced abnormalities in intracellular metabolism and angiogenesis process. These 142 genes were also significantly enriched in adenoma pathway. Module analysis of the systematic regulatory network found that three modules contained elements that were closely related to pituitary adenoma, such as FGF2 and SP1, as well as transcription factors and miRNAs involved in the tumourigenesis. These results show that in the occurrence of pituitary adenoma, miRNA, TF and genes interact with each other. Based on gene expression, the proposed method integrates interaction information from different levels and systematically explains the occurrence of pituitary tumours. It facilitates the tracing of the origin of the disease and can provide basis for early diagnosis of complex diseases or cancer without obvious symptoms.

  17. EGN: a wizard for construction of gene and genome similarity networks.

    Science.gov (United States)

    Halary, Sébastien; McInerney, James O; Lopez, Philippe; Bapteste, Eric

    2013-07-11

    Increasingly, similarity networks are being used for evolutionary analyses of molecular datasets. These networks are very useful, in particular for the analysis of gene sharing, lateral gene transfer and for the detection of distant homologs. Currently, such analyses require some computer programming skills due to the limited availability of user-friendly freely distributed software. Consequently, although appealing, the construction and analyses of these networks remain less familiar to biologists than do phylogenetic approaches. In order to ease the use of similarity networks in the community of evolutionary biologists, we introduce a software program, EGN, that runs under Linux or MacOSX. EGN automates the reconstruction of gene and genome networks from nucleic and proteic sequences. EGN also implements statistics describing genetic diversity in these samples, for various user-defined thresholds of similarities. In the interest of studying the complexity of evolutionary processes affecting microbial evolution, we applied EGN to a dataset of 571,044 proteic sequences from the three domains of life and from mobile elements. We observed that, in Borrelia, plasmids play a different role than in most other eubacteria. Rather than being genetic couriers involved in lateral gene transfer, Borrelia's plasmids and their genes act as private genetic goods, that contribute to the creation of genetic diversity within their parasitic hosts. EGN can be used for constructing, analyzing, and mining molecular datasets in evolutionary studies. The program can help increase our knowledge of the processes through which genes from distinct sources and/or from multiple genomes co-evolve in lineages of cellular organisms.

  18. Standards for Standardized Logistic Regression Coefficients

    Science.gov (United States)

    Menard, Scott

    2011-01-01

    Standardized coefficients in logistic regression analysis have the same utility as standardized coefficients in linear regression analysis. Although there has been no consensus on the best way to construct standardized logistic regression coefficients, there is now sufficient evidence to suggest a single best approach to the construction of a…

  19. Standards for Standardized Logistic Regression Coefficients

    Science.gov (United States)

    Menard, Scott

    2011-01-01

    Standardized coefficients in logistic regression analysis have the same utility as standardized coefficients in linear regression analysis. Although there has been no consensus on the best way to construct standardized logistic regression coefficients, there is now sufficient evidence to suggest a single best approach to the construction of a…

  20. 基于拓扑势的军事物流网络效能度量模型研究%Measuring Model for Military Logistics Network Efficiency Based on Topological Potential

    Institute of Scientific and Technical Information of China (English)

    董志刚; 王智源; 江志; 王健磊

    2012-01-01

    运用拓扑势建立了军事物流网络效能度量模型,真实表现了各个节点和网络整体效能分布数据场.最后通过战区军事物流网络拓扑结构分析和效能度量实例,表明了此方法的科学性和有效性.%The paper formulates a measuring model for the efficiency of military logistics networks based on topological potential which can represent truthfully the efficiency distribution of the nodes and the whole networks. At the end, an empirical example on the topological analysis and efficiency measurement of the military logistics network of a war zone is used to demonstrate the correctness and effectiveness of the method.

  1. 贵港西江黄金水道物流信息服务平台需求分析%Study on Demand in Constructing Logistics Information Service Platform of Guigang Xijiang Golden Waterway

    Institute of Scientific and Technical Information of China (English)

    张宏元

    2012-01-01

    Through a field survey in Guigang, we have analyzed comprehensively the demand for information, function, performance and system of the construction of logistics information service platform for the Xijiang golden waterway.%根据对贵港的实地调研,全面分析了贵港西江黄金水道物流信息服务平台建设的信息需求、功能需求、性能需求和系统需求,以期为平台建设提供一定的参考.

  2. Construction of Financial Crisis Predicting Model for Listed Companies Based on Logistic Regression%基于Logistic回归的上市公司财务预警模型构建

    Institute of Scientific and Technical Information of China (English)

    吴英

    2011-01-01

    The paper passes certain finance index sign and the finance index sign data to construct the predicting model for listed companies by logistic regression analysis.Through examination,the model has proved to be of actual application value.%通过一定的财务指标,采用我国上市公司的财务数据,基于Logistic回归方法构建上市公司财务危机预警的模型,经过检验,具有一定的实际应用价值。

  3. C-Mantec: a novel constructive neural network algorithm incorporating competition between neurons.

    Science.gov (United States)

    Subirats, José L; Franco, Leonardo; Jerez, José M

    2012-02-01

    C-Mantec is a novel neural network constructive algorithm that combines competition between neurons with a stable modified perceptron learning rule. The neuron learning is governed by the thermal perceptron rule that ensures stability of the acquired knowledge while the architecture grows and while the neurons compete for new incoming information. Competition makes it possible that even after new units have been added to the network, existing neurons still can learn if the incoming information is similar to their stored knowledge, and this constitutes a major difference with existing constructing algorithms. The new algorithm is tested on two different sets of benchmark problems: a Boolean function set used in logic circuit design and a well studied set of real world problems. Both sets were used to analyze the size of the constructed architectures and the generalization ability obtained and to compare the results with those from other standard and well known classification algorithms. The problem of overfitting is also analyzed, and a new built-in method to avoid its effects is devised and successfully applied within an active learning paradigm that filter noisy examples. The results show that the new algorithm generates very compact neural architectures with state-of-the-art generalization capabilities.

  4. 基于RBF神经网络的军事物流设施规模预测%Prediction of Military Logistics Facilities Scale Based on RBF Neural Network

    Institute of Scientific and Technical Information of China (English)

    刘洪娟; 甘明; 肖育; 姜玉宏

    2013-01-01

      确定合理的军事物流设施规模对于成功实施军事后勤保障十分重要。提出了基于RBF神经网络的军事物流设施规模预测模型的建模方法,该方法旨在确定军事物流设施规模与其影响因素之间的非线性关系;采用算例说明了基于RBF神经网络的军事物流设施规模预测的具体做法,对军事物流设施规模的确定具有指导意义。%It is important for successfully implementing the military logistics support to determine the reasonable facilities scale of military logistics. This paper puts forward the modeling method for prediction of military logistics facilities scale based on RBF neural network. The purpose of this method is for determining the nonlinear relationship between military logistics facilities scale and its related influence factors. Detailed operations of ascertaining facilities scale of military logistics have been illustrated by usage of an example. This method is a guidance for determining the military logistics facilities scale.

  5. Logistics Management Information System

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The logistics information is the logistics manageme nt 's inevitable request. The paper introduces several kinds of logistics informat ion system and their functions in the logistics management, such as the warehous e management system (WMS) in the delivery center, the control system for transpo rtation and delivery, the supply chain management (SCM), the optimization of th e logistics system, etc. In the author's opinion, the development of logistics could been divided into four phases. And the logistic...

  6. 海峡西岸经济区物流共同配送体系建设%The Construction of Logistics Joint Distribution System in the West-Straits Economic Area

    Institute of Scientific and Technical Information of China (English)

    齐恒

    2011-01-01

    从限制海峡西岸(简称海西)物流发展的瓶颈出发,结合海西实际情况,利用共同配送所具有的提高作业效率、降低物流成本的重要作用,研究了加强海西地区配送体系建设的方案.具体分析了建设共同配送体系的必要性,在建设共同配送体系方面,从区域共同配送网络的空间布局、物流节点的功能定位方面展开讨论,给出相应方案.%Based on the development bottleneck and the real situation of the West-Straits logistics, taking the advantage of the joint distribution to improve the efficiency and reduce the cost; this article researched into the construction of logistics joint distribution system, analyzed the importance and put forward some corresponding projects in the spatial distribution of joint distribution system and the functional orientation of the logistics nodes.

  7. Mastering the political Process of Building Innovation Networks - A Case from the Danish Construction Industry

    DEFF Research Database (Denmark)

    Stissing Jensen, Jens; Koch, Christian; Thomassen, Mikkel

    2008-01-01

    Drawing on network of innovation and organizational politics perspectives this paper analyzes the role of an innovation broker organization in developing and supporting an inter-organizational innovation process in the Danish construction industry. The aim is to implement an ICT-based product...... configuration tool to support the production, sale, and installation of balconies. It is suggested that the innovation broker was successful in stabilizing the innovation process by supplying minimal structures which provided a template which facilitated a combination of individual flexibility and overall...... the network. The innovation thus grew strong enough to replace existing practices and identities and to embed new ones into new organizational structures and a new business-concept...

  8. Neural network forecasting model based on phase space re-construction in water yield of mine

    Institute of Scientific and Technical Information of China (English)

    LIU Wei-lin; DONG Zeng-chuan; CHEN Nan-xiang; CAO Lian-hai

    2007-01-01

    The neutral network forecasting model based on the phase space reconstruction was proposed. First, through reconstructing the phase space, the time series of single variable was done excursion and expanded into multi- dimension series which included the ergodic information and more rich information could be excavated. Then, on the basis of the embedding dimension of the time series, the structure form of neutral network was constructed, of which the node number in input layer was the embedding dimension of the time series minus 1, and the node number in output layers was 1. Finally, as an example,the model was applied for water yield of mine forecasting. The result shows that the model has good fitting accuracy and forecasting precision.

  9. Experimental and computational tools useful for (re)construction of dynamic kinase-substrate networks.

    Science.gov (United States)

    Tan, Chris Soon Heng; Linding, Rune

    2009-12-01

    The explosion of site- and context-specific in vivo phosphorylation events presents a potentially rich source of biological knowledge and calls for novel data analysis and modeling paradigms. Perhaps the most immediate challenge is delineating detected phosphorylation sites to their effector kinases. This is important for (re)constructing transient kinase-substrate interaction networks that are essential for mechanistic understanding of cellular behaviors and therapeutic intervention, but has largely eluded high-throughput protein-interaction studies due to their transient nature and strong dependencies on cellular context. Here, we surveyed some of the computational approaches developed to dissect phosphorylation data detected in systematic proteomic experiments and reviewed some experimental and computational approaches used to map phosphorylation sites to their effector kinases in efforts aimed at reconstructing biological signaling networks.

  10. A Hierarchical Approach to Persistent Scatterer Network Construction and Deformation Time Series Estimation

    Directory of Open Access Journals (Sweden)

    Rui Zhang

    2014-12-01

    Full Text Available This paper presents a hierarchical approach to network construction and time series estimation in persistent scatterer interferometry (PSI for deformation analysis using the time series of high-resolution satellite SAR images. To balance between computational efficiency and solution accuracy, a dividing and conquering algorithm (i.e., two levels of PS networking and solution is proposed for extracting deformation rates of a study area. The algorithm has been tested using 40 high-resolution TerraSAR-X images collected between 2009 and 2010 over Tianjin in China for subsidence analysis, and validated by using the ground-based leveling measurements. The experimental results indicate that the hierarchical approach can remarkably reduce computing time and memory requirements, and the subsidence measurements derived from the hierarchical solution are in good agreement with the leveling data.

  11. [Input layer self-construction neural network and its use in multivariant calibration of infrared spectra].

    Science.gov (United States)

    Gao, J B; Hu, X Y; Hu, D C

    2001-12-01

    In order to solve the problems of feature extraction and calibration modelling in the area of quantitatively infrared spectra analysis, an input layer self-constructive neural network (ILSC-NN) is proposed. Before the NN training process, the training data is firstly analyzed and some prior knowledge about the problem is obtained. During the training process, the number of the input neurons is determined adaptively based on the prior knowledge. Meantime, the network parameters are also determined. This algorithm of the NN model helps to increase the efficiency of calibration modelling. The test experiment of quantitative analysis using simulated spectral data showed that this modelling method could not only achieve efficient wavelength selection, but also remarkably reduce the random and non-linear noises.

  12. Energy Efficient Low-Cost Virtual Backbone Construction for Optimal Routing in Wireless Sensor Networks

    Directory of Open Access Journals (Sweden)

    K. Mohaideen Pitchai

    2014-01-01

    Full Text Available Many prominent applications in wireless sensor networks which require collected information have to be routed to end nodes in an efficient manner. In general, weighted connected dominating Sets (WCDS based routing is a promising approach for enhancing the routing efficiency in sensor networks. Backbone has been used extensively in routing. Here an efficient WCDS algorithm for constructing a virtual backbone with low total cost, hop spanning ratio, and minimum number of dominators is proposed. We report a systematic approach, which has three phases. Initial phase considers the issues of revoking a partial CDS tree from a complete CDS tree. Secondary and final phases make the design of the complete algorithm by considering the determination of dominators using an iteration process. Our findings reveal better performance than the existing algorithms in terms of total cost, hop spanning ratio, and number of dominators.

  13. Use of limited data to construct Bayesian networks for probabilistic risk assessment.

    Energy Technology Data Exchange (ETDEWEB)

    Groth, Katrina M.; Swiler, Laura Painton

    2013-03-01

    Probabilistic Risk Assessment (PRA) is a fundamental part of safety/quality assurance for nuclear power and nuclear weapons. Traditional PRA very effectively models complex hardware system risks using binary probabilistic models. However, traditional PRA models are not flexible enough to accommodate non-binary soft-causal factors, such as digital instrumentation&control, passive components, aging, common cause failure, and human errors. Bayesian Networks offer the opportunity to incorporate these risks into the PRA framework. This report describes the results of an early career LDRD project titled %E2%80%9CUse of Limited Data to Construct Bayesian Networks for Probabilistic Risk Assessment%E2%80%9D. The goal of the work was to establish the capability to develop Bayesian Networks from sparse data, and to demonstrate this capability by producing a data-informed Bayesian Network for use in Human Reliability Analysis (HRA) as part of nuclear power plant Probabilistic Risk Assessment (PRA). This report summarizes the research goal and major products of the research.

  14. Construction and precision evaluation of the GPS virtual reference station network in North Taiwan

    Science.gov (United States)

    Yeh, T.; Lee, Z.; Chang, M.; Chen, C.

    2006-12-01

    The conventional single-reference station positioning is affected by systematic errors such as ionospheric and tropospheric delay, so that the rover must be located within 10 km from the reference station in order to acquire centimeter-level accuracy. The medium-range real-time kinematic has been proven feasible and can be used for high precision applications. However, the longer of the baseline, the more of the time for resolving the integer ambiguity. This is due to the fact that systematic errors can't be eliminated effectively by double- differencing. Recently, network approaches have been proposed to overcome the limitation of the single- reference station positioning. The real-time systematic error modeling can be achieved with the use of GPS network. For expanding the effective range and decreasing the density of the reference stations, Land Survey Bureau, Ministry of the Interior in Taiwan have set up a national GPS network. In order to obtain the high precision positioning and provide the multi-goals services, a GPS network including 27 stations already been constructed in North Taiwan. The users can download the corrections from the data center via the wireless internet and obtain the centimeter-level accuracy positioning. The service is very useful for surveyors and the high precision coordinates can be obtained real time.

  15. Experimental and computational tools useful for (re)construction of dynamic kinase-substrate networks

    DEFF Research Database (Denmark)

    Tan, Chris Soon Heng; Linding, Rune

    2009-01-01

    The explosion of site- and context-specific in vivo phosphorylation events presents a potentially rich source of biological knowledge and calls for novel data analysis and modeling paradigms. Perhaps the most immediate challenge is delineating detected phosphorylation sites to their effector...... kinases. This is important for (re)constructing transient kinase-substrate interaction networks that are essential for mechanistic understanding of cellular behaviors and therapeutic intervention, but has largely eluded high-throughput protein-interaction studies due to their transient nature and strong...

  16. CONSTRUCTION OF THE ENCRYPTION MATRIX BASED ON CHEBYSHEV CHAOTIC NEURAL NETWORKS

    Institute of Scientific and Technical Information of China (English)

    Zou Ajin; Wu Wei; Li Renfa; Li Yongjiang

    2012-01-01

    The paper proposes a novel algorithm to get the encryption matrix.Firstly,a chaotic sequence generated by Chebyshev chaotic neural networks is converted into a series of low-order integer matrices from which available encryption matrices are selected.Then,a higher order encryption matrix relating real world application is constructed by means of tensor production method based on selected encryption matrices.The results show that the proposed algorithm can produce a "one-time pad cipher" encryption matrix with high security; and the encryption results have good chaos and autocorrelation with the natural frequency of the plaintext being hidden and homogenized.

  17. Multi-step simultaneous changes Constructive Heuristic Algorithm for Transmission Network Expansion Planning

    Energy Technology Data Exchange (ETDEWEB)

    Bustamante-Cedeno, Enrique; Arora, Sant [Industrial and Systems Engineering Division, Mechanical Engineering Department, University of Minnesota, 111 Church Street, S.E., Minneapolis, MN 55455 (United States)

    2009-04-15

    In this paper, a Constructive Heuristic Algorithm (CHA) is presented to solve the Transmission Network Expansion Planning Problem (TNEP), a complex non-convex Mixed Integer Non-Linear Programming (MINLP) problem with multiple local minima. In the proposed algorithm, the non-linearities are resolved through the following feature: when discrete decision variables are given, the model becomes linear in the continuous variables. A CHA is developed which improves the current solution by implementing multiple step simultaneous changes over a number of saturated transmission lines, in contrast to the approach traditionally followed, which implements one change at a time. Solutions to test problems are computed. (author)

  18. 生鲜乳制品冷链物流模式评价及构建研究%Researching on the Evaluation and Construction of Cold-chain Logistics Mode of Dairy Products

    Institute of Scientific and Technical Information of China (English)

    张建军

    2015-01-01

    Logistics mode of cold-chain concerning fresh milk and dairy products is an important content of cold-chain logistics about dairy products, which is the key to determine the security of quality about fresh milk and dairy products, stabilize the price of dairy products, improve cold-chain circulation rate of dairy product and ensure the economic benefit and service quality of the cold-chain logistics about dairy product. This paper constructs the evaluation index system of cold-chain logistics mode about fresh dairy product, uses the method of analytic hierarchy process to calculate the weight of each index, introduces the main factors that influence the f cold-chain logistics mode of fresh dairy product. Then , based on the main factors and the visualization of the perspective of supply chain, this paper puts forward the path to build a cold-chain logistics mode of dairy product, namely to construct the visual supply chain mode which should deem the dairy products production enterprise as the core enterprise , the third party or the fourth party cold-chain logistics as the main organization form. This mode can optimize the main factors concerning cold-chain logistics mode of dairy product, which is worthy of study and reference.%生鲜乳制品冷链物流模式是乳制品冷链物流的重要内容,是决定生鲜乳制品质量安全、稳定乳制品价格、提高乳制品冷链流通率和保证乳制品冷链物流经济效益和服务质量的关键。文章应用平衡计分卡原理构建生鲜乳制品冷链物流模式评价指标体系、利用层次分析法计算各评价指标的权重,进而分析得出影响生鲜乳制品冷链物流模式的主要因素。紧接着,围绕影响生鲜乳制品冷链物流模式的主要因素,基于可视化供应链的角度,提出构建乳制品冷链物流模式的路径,即构建以乳制品加工企业为核心企业,以第三方、第四方冷链物流为主要组织形

  19. 一带一路经济区现代物流体系构建%The Construction of Modern Logistic System in the Belt and Road Economic Region

    Institute of Scientific and Technical Information of China (English)

    王娟娟

    2016-01-01

    and Road economic region to initiatively coordinate with the economic development level of other developed areas;so we should introduce new medium to narrow the economic gaps,and the construction of modern logistic system is the advantageous choice. With the consideration of the current economic situation and the features of local products in the Belt and Road economic region, we should develop the modern logistic system by adhering to the essence of logistics,pay more attention to the improvement of logistic efficiency,and smooth the channel for the fruit of industrial transferring to return to the expected result. Constrained by this development target,the modern logistic system in the Belt and Road economic region will definitely become the result of combination between government and market;it will take government participation and logistic infrastructure as the soft and hard basis,cultivate the capacity for logistics with the characteristics of the Belt and Road,and improve its level with the help of logistic service. The realization of this initiative in the context of modern economic pattern needs the help of cloud computing to expand the capacity of modern logistic system in the Belt and Road economic region and eliminate the traditional logistic bottleneck,needs the help of big data to integrate information and create extra value of logistics,and needs the help of all the economic entities to strengthen connectivity and built the Internet of Things to lay solid foundation for the improvement of logistic efficiency in this economic region. Based on the existed basis and the requirement of marketization,e-commerce is the circulation channel to construct the modern logistic system in the Belt and Road economic region, and coordinated progress of logistics and manufacturing industries is the production channel to perfect this system with the help of the idea of reform of the supply front.

  20. Recursive random forest algorithm for constructing multilayered hierarchical gene regulatory networks that govern biological pathways

    Science.gov (United States)

    Zhang, Kui; Busov, Victor; Wei, Hairong

    2017-01-01

    Background Present knowledge indicates a multilayered hierarchical gene regulatory network (ML-hGRN) often operates above a biological pathway. Although the ML-hGRN is very important for understanding how a pathway is regulated, there is almost no computational algorithm for directly constructing ML-hGRNs. Results A backward elimination random forest (BWERF) algorithm was developed for constructing the ML-hGRN operating above a biological pathway. For each pathway gene, the BWERF used a random forest model to calculate the importance values of all transcription factors (TFs) to this pathway gene recursively with a portion (e.g. 1/10) of least important TFs being excluded in each round of modeling, during which, the importance values of all TFs to the pathway gene were updated and ranked until only one TF was remained in the list. The above procedure, termed BWERF. After that, the importance values of a TF to all pathway genes were aggregated and fitted to a Gaussian mixture model to determine the TF retention for the regulatory layer immediately above the pathway layer. The acquired TFs at the secondary layer were then set to be the new bottom layer to infer the next upper layer, and this process was repeated until a ML-hGRN with the expected layers was obtained. Conclusions BWERF improved the accuracy for constructing ML-hGRNs because it used backward elimination to exclude the noise genes, and aggregated the individual importance values for determining the TFs retention. We validated the BWERF by using it for constructing ML-hGRNs operating above mouse pluripotency maintenance pathway and Arabidopsis lignocellulosic pathway. Compared to GENIE3, BWERF showed an improvement in recognizing authentic TFs regulating a pathway. Compared to the bottom-up Gaussian graphical model algorithm we developed for constructing ML-hGRNs, the BWERF can construct ML-hGRNs with significantly reduced edges that enable biologists to choose the implicit edges for experimental