WorldWideScience

Sample records for china current magnitude

  1. Environmental problems in the People`s Republic of China: Current magnitude and possible control options

    Energy Technology Data Exchange (ETDEWEB)

    Bhadtti, N.; Biang, C.A.; Poch, L.A.; Tompkins, M.M.

    1995-09-01

    The People`s Republic of China has been undergoing rapid economic development over the past several decades. This development has taken place with little or no attention being paid to its environmental consequences. This situation has resulted in severe contamination of the air, water, and soil resources of China, with attendant damage to human and natural populations. This report determines the major causes of air, water, and soil pollution in China and assesses their extent and magnitude. It then examines the impacts of the pollutants on various components of the human and natural environment. It identifies possible regulatory and ameliorative options available to China to deal with these pollution problems and provides information on specific strategies and the costs associated with their implementation. The objective is to shed light on China`s pollution control and remediation requirements in the near future.

  2. Comparison between different earthquake magnitudes determined by China Seismograph Network

    Institute of Scientific and Technical Information of China (English)

    LIU Rui-feng; CHEN Yun-tai; REN Xiao; XU Zhi-guo; SUN Li; YANG Hui; LIANG Jian-hong; REN Ke-xin

    2007-01-01

    By linear regression and orthogonal regression methods, comparisons are made between different magnitudes (local magnitude ML, surface wave magnitudes MS and MS7, long-period body wave magnitude mB and short-period body wave magnitude mb) determined by Institute of Geophysics, China Earthquake Administration, on the basis of observation data collected by China Seismograph Network between 1983 and 2004. Empirical relations between different magnitudes have been obtained. The result shows that: ①As different magnitude scales reflect radiated energy by seismic waves within different periods, earthquake magnitudes can be described more objectively by using different scales for earthquakes of different magnitudes. When the epicentral distance is less than 1 000 km, local magnitude ML can be a preferable scale; In case MMS, i.e., MS underestimates magnitudes of such events, therefore, mB can be a better choice; In case M>6.0, MS>mB>mb, both mB and mb underestimate the magnitudes, so MS is a preferable scale for determining magnitudes of such events (6.08.5, a saturation phenomenon appears in MS, which cannot give an accurate reflection of the magnitudes of such large events; ②In China, when the epicentral distance is less than 1 000 km, there is almost no difference between ML and MS, and thus there is no need to convert between the two magnitudes in practice; ③Although MS and MS7 are both surface wave magnitudes, MS is in general greater than MS7 by 0.2~0.3 magnitude, because different instruments and calculation formulae are used; ④mB is almost equal to mb for earthquakes around mB4.0, but mB is larger than mb for those of mB(4.5, because the periods of seismic waves used for measuring mB and mb are different though the calculation formulae are the same.

  3. Comparison between earthquake magnitudes determined by China seismograph network and US seismograph networks (Ⅰ): Body wave magnitude

    Institute of Scientific and Technical Information of China (English)

    LIU Rui-feng; CHEN Yun-tai; Peter Bormann; REN Xiao; HOU Jian-min; ZOU Li-ye; YANG Hui

    2005-01-01

    By using orthogonal regression method, a systematic comparison is made between body wave magnitudes determined by Institute of Geophysics of China Earthquake Administration (IGCEA) and National Earthquake Information Center of US Geological Survey (USGS/NEIC) on the basis of observation data from China and US seismograph networks between 1983 and 2004. The result of orthogonal regression shows no systematic error between body wave magnitude mb determined by IGCEA and mb (NEIC). Provided that mb (NEIC) is taken as the benchmark, body wave magnitude determined by IGCEA is greater by 0.2~0.1 than the magnitude determined by NEIC for M=3.5~4.5 earthquakes; for M=5.0~5.5 earthquakes, there is no difference; and for M≥6.0 earthquakes, it is smaller by no more than 0.2. This is consistent with the result of comparison by IDC (International Data Center).

  4. Comparison between earthquake magnitudes determined by China seismograph network and US seismograph network (Ⅱ):Surface wave magnitude

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    By using orthogonal regression method, a systematic comparison is made between surface wave magnitudes determined by Institute of Geophysics of China Earthquake Administration (IGCEA) and National Earthquake Information Center of US Geological Survey (USGS/NEIC) on the basis of observation data collected by the two institutions between 1983 and 2004. A formula is obtained which reveals the relationship between surface wave magnitudes determined by China seismograph network and US seismograph network. The result shows that, as different calculation formulae and observational instruments are used, surface wave magnitude determined by IGCEA is generally greater by 0.2 than that determined by NEIC: for M=3.5~4.5 earthquakes, it is greater by 0.3;for M=5.0~6.5 earthquakes, it is greater by 0.2;and for M≥7.0 earthquakes, it is greater by no more than 0.1.

  5. Autonomous Method and System for Minimizing the Magnitude of Plasma Discharge Current Oscillations in a Hall Effect Plasma Device

    Science.gov (United States)

    Hruby, Vladimir (Inventor); Demmons, Nathaniel (Inventor); Ehrbar, Eric (Inventor); Pote, Bruce (Inventor); Rosenblad, Nathan (Inventor)

    2014-01-01

    An autonomous method for minimizing the magnitude of plasma discharge current oscillations in a Hall effect plasma device includes iteratively measuring plasma discharge current oscillations of the plasma device and iteratively adjusting the magnet current delivered to the plasma device in response to measured plasma discharge current oscillations to reduce the magnitude of the plasma discharge current oscillations.

  6. Current development of biorefinery in China.

    Science.gov (United States)

    Tan, Tianwei; Shang, Fei; Zhang, Xu

    2010-01-01

    To meet the demand of its fast growing economy, China has become already the second largest buyer of crude oil. China is facing critical problems of energy shortage and environment deterioration. Rational and efficient energy use and environment protection are both getting more attention in China. Biomass energy is renewable energy made from biological sources. China's biomass resources are abundant, which could provide energy for future social and economic development. However technologies for biomass resource conversion in China are still just beginning. In this paper, current biomass resource distribution and technologies of biomass energy, including power generation, biofuel production and biomass-based chemical production are reviewed. PMID:20493245

  7. Study on electrical current variations in electromembrane extraction process: Relation between extraction recovery and magnitude of electrical current.

    Science.gov (United States)

    Rahmani, Turaj; Rahimi, Atyeh; Nojavan, Saeed

    2016-01-15

    This contribution presents an experimental approach to improve analytical performance of electromembrane extraction (EME) procedure, which is based on the scrutiny of current pattern under different extraction conditions such as using different organic solvents as supported liquid membrane, electrical potentials, pH values of donor and acceptor phases, variable extraction times, temperatures, stirring rates, different hollow fiber lengths and the addition of salts or organic solvents to the sample matrix. In this study, four basic drugs with different polarities were extracted under different conditions with the corresponding electrical current patterns compared against extraction recoveries. The extraction process was demonstrated in terms of EME-HPLC analyses of selected basic drugs. Comparing the obtained extraction recoveries with the electrical current patterns, most cases exhibited minimum recovery and repeatability at the highest investigated magnitude of electrical current. . It was further found that identical current patterns are associated with repeated extraction efficiencies. In other words, the pattern should be repeated for a successful extraction. The results showed completely different electrical currents under different extraction conditions, so that all variable parameters have contributions into the electrical current pattern. Finally, the current patterns of extractions from wastewater, plasma and urine samples were demonstrated. The results indicated an increase in the electrical current when extracting from complex matrices; this was seen to decrease the extraction efficiency.

  8. Current epidemiology of sepsis in mainland China

    Science.gov (United States)

    Liao, Xuelian; Du, Bin; Lu, Meizhu; Wu, Minming

    2016-01-01

    The disease burden of sepsis is a global issue. Most of the large-scale epidemiological investigations on sepsis have been carried out in developed countries. The population of 1.3 billion in mainland China accounts for approximately 1/5th of the whole world population. Thus, the knowledge of the incidence and mortality of sepsis in mainland China is vital before employing measures for its improvement. However, most of the epidemiological data of sepsis in mainland China was obtained from ICU settings, and thus lacks the population-based incidence and mortality of sepsis. In the present review, we summarized the limited literature encompassing the incidence, mortality, long-term outcome, and pathogens of sepsis in mainland China. Therefore, it might provide some valuable information regarding the sepsis disease burden and current issues in the management of sepsis in mainland China.

  9. Changes in river water temperature between 1980 and 2012 in Yongan watershed, eastern China: Magnitude, drivers and models

    OpenAIRE

    Chen, D.; Hu, M.; Guo, Y.; Dahlgren, RA

    2016-01-01

    © 2015 Elsevier B.V. Climate warming is expected to have major impacts on river water quality, water column/hyporheic zone biogeochemistry and aquatic ecosystems. A quantitative understanding of spatio-temporal air (Ta) and water (Tw) temperature dynamics is required to guide river management and to facilitate adaptations to climate change. This study determined the magnitude, drivers and models for increasing Tw in three river segments of the Yongan watershed in eastern China. Over the 1980-...

  10. Current research of hepatic cirrhosis in China

    Institute of Scientific and Technical Information of China (English)

    Xi-Xian Yao; Shu-Lin Jiang; Dong-Mei Yao

    2005-01-01

    Hepatic cirrhosis is a common disease that poses a serious threat to public health, and is characterized by chronic,progressive and diffuse hepatic lesions preceded by hepaticfibrosis regardless of the exact etiologies. In recent years,considerable achievements have been made in China in research of the etiopathogenesis, diagnosis and especially the treatment of hepatic fibrosis, resulting in much improved prognosis of hepatic fibrosis and cirrhosis. In this paper, the authors review the current status of research in hepatic fibrosis, cirrhosis and their major complications.

  11. Improving Students' Ability to Intuitively Infer Resistance from Magnitude of Current and Potential Difference Information: A Functional Learning Approach

    Science.gov (United States)

    Chasseigne, Gerard; Giraudeau, Caroline; Lafon, Peggy; Mullet, Etienne

    2011-01-01

    The study examined the knowledge of the functional relations between potential difference, magnitude of current, and resistance among seventh graders, ninth graders, 11th graders (in technical schools), and college students. It also tested the efficiency of a learning device named "functional learning" derived from cognitive psychology on the…

  12. Perspectives on the Salience and Magnitude of Dam Impacts for Hydro Development Scenarios in China

    Directory of Open Access Journals (Sweden)

    Desiree Tullos

    2010-06-01

    Survey results indicate differences in the perceived salience and magnitude of impacts across both expert groups and dam scenarios. Furthermore, surveys indicate that stakeholder perceptions changed as the information provided regarding dam impacts became more specific, suggesting that stakeholder evaluation may be influenced by quality of information. Finally, qualitative comments from the survey reflect some of the challenges of interdisciplinary dam assessment, including cross-disciplinary cooperation, data standardisation and weighting, and the distribution and potential mitigation of impacts. Given the complexity of data and perceptions around dam impacts, decision-support tools that integrate the objective magnitude and perceived salience of impacts are required urgently.

  13. Radiopharmaceuticals in China. Current status and prospects

    International Nuclear Information System (INIS)

    The review provides an overview of the current status of radiopharmaceuticals in China for in vivo clinical use and also describes some important advances in the past three decades. Development of the diagnostic and therapeutic radiopharmaceuticals as well as basic research on radiopharmaceutical chemistry are being introduced. The radiotracers developed in China include: (1) Brain perfusion imaging agents and CNS radiotracers for β-amyloid plaques, σ1 receptors, and dopamine D2 or D4 receptors; (2) 99mTc- and 18F-labeled myocardial perfusion imaging agents; (3) tumor imaging agents including integrin-targeting radiotracer, novel sentinel lymph node imaging agents, hypoxia imaging agents, 99mTc-labeled glucose derivatives, σ2 receptor imaging agents, folate receptor imaging agents, and potential radiotracers for imaging of human telomerase reverse transcriptase expression; (4) Potential infection imaging agents; (5) Potential asialoglycoprotein receptor imaging agents; (6) Other imaging agents. Moreover, some prospects of research and development of radiopharmaceuticals in the near future are discussed. (orig.)

  14. Radiopharmaceuticals in China. Current status and prospects

    Energy Technology Data Exchange (ETDEWEB)

    Jia, Hong-Mei; Liu, Bo-Li [Beijing Normal Univ. (China). Key Laboratory of Radiopharmaceuticals

    2014-04-01

    The review provides an overview of the current status of radiopharmaceuticals in China for in vivo clinical use and also describes some important advances in the past three decades. Development of the diagnostic and therapeutic radiopharmaceuticals as well as basic research on radiopharmaceutical chemistry are being introduced. The radiotracers developed in China include: (1) Brain perfusion imaging agents and CNS radiotracers for β-amyloid plaques, σ{sub 1} receptors, and dopamine D{sub 2} or D{sub 4} receptors; (2) {sup 99m}Tc- and {sup 18}F-labeled myocardial perfusion imaging agents; (3) tumor imaging agents including integrin-targeting radiotracer, novel sentinel lymph node imaging agents, hypoxia imaging agents, {sup 99m}Tc-labeled glucose derivatives, σ{sub 2} receptor imaging agents, folate receptor imaging agents, and potential radiotracers for imaging of human telomerase reverse transcriptase expression; (4) Potential infection imaging agents; (5) Potential asialoglycoprotein receptor imaging agents; (6) Other imaging agents. Moreover, some prospects of research and development of radiopharmaceuticals in the near future are discussed. (orig.)

  15. 10 Orders of Magnitude Current Measurement Digitisers for the CERN Beam Loss Systems

    CERN Document Server

    Vigano, W; Dehning, B; Kwiatkowski, M; Venturini, G G; Zamantzas, C

    2014-01-01

    A wide range current digitizer card is needed for the acquisition module of the beam loss monitoring systems in the CERN Injector Complex. The fully differential frequency converter allows measuring positive and negative input currents with a resolution of 31nA in an integration window of 2μs. Increasing the integration window, the dynamic range covers 2•1010 were the upper part of the range is converted by measuring directly the voltage drop on a resistor. The key elements of this design are the fully differential integrator and the switches operated by an FPGA. The circuit is designed to avoid any dead time in the acquisition and reliability and failsafe operational considerations are main design goals. The circuit will be discussed in detail and lab and field measurements will be shown.

  16. 10 orders of magnitude current measurement digitisers for the CERN beam loss systems

    Science.gov (United States)

    Viganò, W.; Alsdorf, M.; Dehning, B.; Kwiatkowski, M.; Venturini, G. G.; Zamantzas, C.

    2014-02-01

    A wide range current digitizer card is needed for the acquisition module of the beam loss monitoring systems in the CERN Injector Complex. The fully differential frequency converter allows measuring positive and negative input currents with a resolution of 31 nA in an integration window of 2 μs. Increasing the integration window, the dynamic range covers 21010 were the upper part of the range is converted by measuring directly the voltage drop on a resistor. The key elements of this design are the fully differential integrator and the switches operated by an FPGA. The circuit is designed to avoid any dead time in the acquisition and reliability and failsafe operational considerations are main design goals. The circuit will be discussed in detail and lab and field measurements will be shown.

  17. Early Holocene High Magnitude Debris Flow Events and Environmental Change as Illustrated by the Moxi Platform, Hengduan Mountains, SW China

    Institute of Scientific and Technical Information of China (English)

    ZHANG Junyan; CHENG Genwei; LI Yongfei

    2006-01-01

    Thick debris flow deposits in the Hengduan Mountains of southwestern China record landscape instability at the close of the last glaciation and in the early Holocene. The deposits, ranging in thickness from 100 to 200 m, are common and in high magnitude in the valleys of this region. They are products of large debris flows induced by glacier and enabled by the presence of large amount of glacial debris on the landscape. The carbon 14 dating from Moxi Platform indicates that a period of catastrophic debris flows occurred at c. 7 kyr B.P., and was concurrent with other glacial-fluvial fans and terraces which tied to regional climatic oscillations elsewhere in the Himalaya. The comparable events suggest a strong climatic control on earth surface processes for the dynamics, magnitude, and frequency in this region.

  18. Earthquake probabilities and magnitude distribution (M≥6.7) along the Haiyuan fault, northwestern China

    Institute of Scientific and Technical Information of China (English)

    冉洪流

    2004-01-01

    In recent years, some researchers have studied the paleoearthquake along the Haiyuan fault and revealed a lot of paleoearthquake events. All available information allows more reliable analysis of earthquake recurrence interval and earthquake rupture patterns along the Haiyuan fault. Based on this paleoseismological information, the recurrence probability and magnitude distribution for M≥6.7 earthquakes in future 100 years along the Haiyuan fault can be obtained through weighted computation by using Poisson and Brownian passage time models and considering different rupture patterns. The result shows that the recurrence probability of MS≥6.7 earthquakes is about 0.035 in future 100 years along the Haiyuan fault.

  19. Using Large Waveform Archives of Historical Seismic Events to Improve Relative Magnitude Estimates In and Near China

    Science.gov (United States)

    Schaff, D. P.; Richards, P. G.

    2012-12-01

    typical detection thresholds. Making measurements of the logarithm of the ratio of the L2 norms is shown to remove the bias due to degradation of waveform similarity for real data. The scatter of these measurements is also much less than those estimated in the catalog. Out of 14,025 events we have studied in and near China, 34% had over an order of magnitude reduction in the median standard deviation (0.0342 magnitude units) as compared to the estimated scatter in the catalog (0.3454 magnitude units). And 78% of the events show a factor 3 improvement or better as compared to the catalog for relative magnitudes measured as the ratio of the L2 norms. These results suggest that the logarithm of the ratio of the L2 norms is an appropriate measure of relative event size for analyzing general seismicity of a region where there are many pairs of neighboring events that have sufficient similarity, even though they are not co-located. The logarithm of the L2 ratio still shows significant improvement over the relative station magnitude for a large percentage of the events.

  20. China: current trends in pharmaceutical drug discovery.

    Science.gov (United States)

    Luo, Ying

    2008-04-01

    Pharmaceutical discovery and development is expensive and highly risky, even for multinational corporations. As a developing country with limited financial resources, China has been seeking the most cost-effective means to reach the same level of innovation and productivity as Western countries in the pharmaceutical industry sector. After more than 50 years of building up talent and experience, the time for China to become a powerhouse in pharmaceutical innovation is finally approaching. Returnee scientists to China are one of the reasons for the wave of new discovery and commercialization occurring within the country. The consolidation of local Chinese pharmaceutical companies and foreign investment is also providing an agreeable environment for the evolution of a new generation of biotechnology. The opportunity for pharmaceutical innovation is also being expedited by the entry of multinational companies into the Chinese pharmaceutical market, and by the outsourcing of research from these companies to China. PMID:18379963

  1. Current status of radiology in China

    Institute of Scientific and Technical Information of China (English)

    Meng Su Zeng; Kang Rong Zhou; Zhi Yong Zhang; Wei Jun Peng; Fu Hua Yang; Jiang Lin; Jun Yang; Xin Ye Han

    2000-01-01

    @@INTRODUCTION Radiology has been greatly advanced in China since its founding in 1949 and has been developed faster and further more since China adopted the policy of socioeconomic reform in 1978. It plays an increasingly important role in the medical health care and treatment in the country and has reached the world′s advanced level in certain fields. We now briefly review the history of China′s radiology so as to give a clear picture of its development.

  2. Current situation and development of solar heating technology in China

    Institute of Scientific and Technical Information of China (English)

    Zheng Ruicheng

    2009-01-01

    It is introduced the current situation and development for solar heating technology including passive solar heat-ing and solar heating combisystems in China in this paper. Combined with the engineering application projects, the au-thor gave the technical and economic analysis of the passive solar and solar heating combisystems in China and summa-rized the developing obstacle and the spreading tactics for raising marketing of the solar heating in China.

  3. Current progress of China's free ART program

    Institute of Scientific and Technical Information of China (English)

    Fu Jie ZHANG; Jennifer PAN; Lan YU; Yi WEN; Yan ZHAO

    2005-01-01

    China's Free ART Program was initiated in 2002 as an emergency response to save and improve the lives of AIDS patients living mainly in impoverished rural regions of central China. With little experience in HIV/AIDS treatment and care and resource limitations, China's efforts to provide widespread access to free antiretroviral therapy has been a process fraught with difficulty. However, the Free ART Program is progressing from an emergency response to a standardized treatment and care system. The development of national guidelines, training programs, a laboratory support network, a national patient database, programs for special populations such as children and patients living with coinfections, and operational research has improved the scope and quality of the free treatment program. As of June 30,2005, a total of 19,456 patients in 28 provinces, autonomous regions, and special municipalities had received free ART.Challenges stemming from the nature of China's health system and patient population persist, but with strong government support and a diverse set of resources, China has the capacity to overcome these challenges and to provide nationwide access to high quality treatment and care.

  4. Haze in China: current and future challenges.

    Science.gov (United States)

    Li, Meina; Zhang, Lulu

    2014-06-01

    Regional haze which triggered both public anxiety and official concerns has been one of the most disastrous weather events in China in recent years. Haze not only had negative impact on daily life, but also an indicator of high concentrations of PM2.5 with the potential to adversely impact public health by damaging people's respiratory, cardiovascular, blood vessel of brain and nervous system. The dust-haze is an accumulated result for a long time of both natural factors and unhealthy economic growth model. In order to tackle air pollution, a number of policies and measures which target at reducing pollution emission and promoting alternative energy production had been implemented. Although significant improvement has occurred in China, change the development mode of "high growth, high pollution" and balance environmental conservation with the well-being of the population remains a challenge for China.

  5. Current Advanced Power Generation Technologies and Options for China (1)

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    @@ In China,electricity consumption keeps growing at a high speed and installed capacity will be doubled in the next fifteen years.As the world second CO2 producer and also a member of Kyoto Protocol,how to balance energy needs and environmental protection responsibility in the future is a serious problem for China.As such,there are a number of technology choices for today's electric power generation.After discussing the current advanced power generation technologies based on Chinese energy structure and current conditions of power industry,this paper gives a reference to the technology options for China in the future.

  6. Current status of acupuncture and moxibustion in China

    OpenAIRE

    Lim, Min Yee; Huang, Jian; Zhao, Baixiao; Ha, Lue

    2015-01-01

    Acupuncture and moxibustion are more integrated in the Chinese healthcare system than in the national healthcare systems of other countries. Development of acupuncture and moxibustion in China is making progress in this field. For overseas researchers, this commentary offers perspectives on the current status of acupuncture and moxibustion in China and examines relevant opportunities and challenges in healthcare reforms. There has been a steady increase in the number of undergraduates and pos...

  7. Current Status and Development of National Grid in China

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    With most primary energy resources far from load centers, the voltage level of power system in China has imperatively been upgraded to meet the demand of long-distance power transmission. The successful commissioning of the 750-kV HVAC line in Northwest Power Grid has opened an era of national grid devel opment and brought about a series of technical problems to be faced. This report introduces briefly the current status and policies of UHV development in China.

  8. An Analysis of Modern Bilingualism Currently Existing in China

    Institute of Scientific and Technical Information of China (English)

    何婧

    2013-01-01

    This paper introduces two kinds of conceptions of bilingualism existing in China. One is traditional bilingualism, and the other refers to using a foreign language-English as an instrument to teach specialist subjects, which is called modern bilingual-ism. Then the emphasis is put on the latter to analyze the current circumstances in China, and its own affective factors and diffi-culties confronting it have been taken into account.

  9. Changes in river water temperature between 1980 and 2012 in Yongan watershed, eastern China: Magnitude, drivers and models

    Science.gov (United States)

    Chen, Dingjiang; Hu, Minpeng; Guo, Yi; Dahlgren, Randy A.

    2016-02-01

    Climate warming is expected to have major impacts on river water quality, water column/hyporheic zone biogeochemistry and aquatic ecosystems. A quantitative understanding of spatio-temporal air (Ta) and water (Tw) temperature dynamics is required to guide river management and to facilitate adaptations to climate change. This study determined the magnitude, drivers and models for increasing Tw in three river segments of the Yongan watershed in eastern China. Over the 1980-2012 period, Tw in the watershed increased by 0.029-0.046 °C yr-1 due to a ∼0.050 °C yr-1 increase of Ta and changes in local human activities (e.g., increasing developed land and population density and decreasing forest area). A standardized multiple regression model was developed for predicting annual Tw (R2 = 0.88-0.91) and identifying/partitioning the impact of the principal drivers on increasing Tw:Ta (76 ± 1%), local human activities (14 ± 2%), and water discharge (10 ± 1%). After normalizing water discharge, climate warming and local human activities were estimated to contribute 81-95% and 5-19% of the observed rising Tw, respectively. Models forecast a 0.32-1.76 °C increase in Tw by 2050 compared with the 2000-2012 baseline condition based on four future scenarios. Heterogeneity of warming rates existed across seasons and river segments, with the lower flow river and dry season demonstrating a more pronounced response to climate warming and human activities. Rising Tw due to changes in climate, local human activities and hydrology has a considerable potential to aggravate river water quality degradation and coastal water eutrophication in summer. Thus it should be carefully considered in developing watershed management strategies in response to climate change.

  10. Sustained high magnitude erosional forcing generates an organic carbon sink: Test and implications in the Loess Plateau, China

    Science.gov (United States)

    Li, Y.; Quine, T. A.; Yu, H. Q.; Govers, G.; Six, J.; Gong, D. Z.; Wang, Z.; Zhang, Y. Z.; Van Oost, K.

    2015-02-01

    Humans are now the most important geomorphic agent on the planet and accelerated erosion in agricultural landscapes results in high magnitude lateral organic carbon (OC) fluxes and significant perturbation of the land-ocean carbon flux. Nevertheless, the net effect of these lateral carbon fluxes on the C cycle is poorly constrained and there is no consensus as to whether they drive a net source or net sink of atmospheric CO2. Here, we test the hypothesis that, under sustained erosional forcing, soil carbon stocks on hillslopes reach a new equilibrium state in which all carbon exported with erosion is replaced; and, therefore, erosion results in a net sink for atmospheric CO2 at the scale of eroding hillslopes. The evidence from our study site, in the Loess Plateau of China, is consistent with this hypothesis. Despite net export of OC equivalent to ca. 10% NPP, we found that all of the eroded OC was replaced and, therefore, that the sink strength was equal to the C export rate. This sets the upper limit of the erosion-induced sink term at the scale of whole watershed. The fate of the exported carbon in reservoirs, floodplains, riverbeds and the ocean ultimately controls the watershed-scale sink strength. Nevertheless, the full replacement observed here suggests that erosion does not induce a C source, irrespective of the fate of the exported carbon, at least for high-input agricultural systems. Finally, we propose that assessment of the C cycle perturbation associated with erosion-induced lateral C fluxes must be made an integral part of accounting mechanisms for climate change mitigation strategies that are based on land use change and C sequestration in terrestrial environments.

  11. The blink reflex magnitude is continuously adjusted according to both current and predicted stimulus position with respect to the face.

    Science.gov (United States)

    Wallwork, Sarah B; Talbot, Kerwin; Camfferman, Danny; Moseley, G L; Iannetti, G D

    2016-08-01

    The magnitude of the hand-blink reflex (HBR), a subcortical defensive reflex elicited by the electrical stimulation of the median nerve, is increased when the stimulated hand is close to the face ('far-near effect'). This enhancement occurs through a cortico-bulbar facilitation of the polysynaptic medullary pathways subserving the reflex. Here, in two experiments, we investigated the temporal characteristics of this facilitation, and its adjustment during voluntary movement of the stimulated hand. Given that individuals navigate in a fast changing environment, one would expect the cortico-bulbar modulation of this response to adjust rapidly, and as a function of the predicted spatial position of external threats. We observed two main results. First, the HBR modulation occurs without a temporal delay between when the hand has reached the stimulation position and when the stimulus happens (Experiments 1 and 2). Second, the voluntary movement of the hand interacts with the 'far-near effect': stimuli delivered when the hand is far from the face elicit an enhanced HBR if the hand is being moved towards the face, whereas stimuli delivered when the hand is near the face elicit an enhanced HBR regardless of the direction of the hand movement (Experiment 2). These results indicate that the top-down modulation of this subcortical defensive reflex occurs continuously, and takes into account both the current and the predicted position of potential threats with respect to the body. The continuous control of the excitability of subcortical reflex circuits ensures appropriate adjustment of defensive responses in a rapidly-changing sensory environment. PMID:27236372

  12. Current Advanced Power Generation Technologies and Options for China (2)

    Institute of Scientific and Technical Information of China (English)

    Deng Nubo; Mohsen Assadi; Yang Cheng

    2008-01-01

    @@ In China,electricity consumption keeps growing at a high speed and installed capacity will be doubled in the next fifteen years.As the world second CO2 producer and also a member of Kyoto Protocol,how to balance energy needs arid environmental protection responsibility in the future is a serious problem for China.As such,there are a number of technology choices for today's electric power generation.After discussing the current advanced power generation technologies based on Chinese energy structure and current conditions of power industry,this paper gives a reference to the technology options for China in the future.Here published is the second part of the paper.

  13. Educational Research in Mainland China: Current Situation and Developmental Trends

    Science.gov (United States)

    Sun, Miantao

    2011-01-01

    The influence of Confucian culture in Chinese Mainland China is reflected in the current situation and contextual trends of educational research content of educational thought of Confucianism, educational issues grounded on theoretical views of Confucianism, and the influence of the inclusiveness of Confucianism. In terms of research method, the…

  14. 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.

  15. Computer Informational Retrieval in China: Current Situation and Future Trends.

    Science.gov (United States)

    Bing, Wang

    1988-01-01

    Discusses the background and the current situation of computer information retrieval systems in China. Problem areas considered include: (1) lack of coordination of activities; (2) lack of data on user demand; and (3) shortages of personnel in computer science, mathematics, and systems engineering. An agenda for the future is outlined. (MES)

  16. Ecopharmacovigilance: Current state, challenges, and opportunities in China

    Directory of Open Access Journals (Sweden)

    Jun Wang

    2014-01-01

    Full Text Available In a context of severe pharmaceutical pollution, "ecopharmacovigilance" (EPV has been an area of novel interest. It aims to ensure that significant environmental issues associated with pharmaceuticals in the environment are identified in a timely way, and managed appropriately. EPV has become a research hotspot as a comprehensive and boundary science in Europe and North America, and regulatory requirements governing the comprehensive environmental risk assessment (ERA of pharmaceuticals exist in these regions. A speedy Chinese pharmaceutical industry development and drug consumption, China should shoulder more international responsibility and contribute to the worldwide EPV. Compared to the west, EPV in China is in its infancy. We analyzed the current state of EPV-related practice in China and found that many efforts have been made by the Chinese government and specialists to control the ever-worsening environmental pharmaceutical pollution problems, including consummating related policies and regulations, revealing the occurrence and behavior of pharmaceutical residues in environment and developing new technologies to improve their removal performance. Besides, we posed some recommendations on appropriate EPV implementation that can be taken with China in future. These include, building perfect laws and regulation system on EPV, defining the evaluation index for EPV, continuing the clinical rational medication and the pharmaceutical take-back programs in China, popularizing the concept of EPV in China, and strengthening the policy-guided and scientific researches of EPV in pharmaceutical firms and academia.

  17. Ecopharmacovigilance: Current state, challenges, and opportunities in China.

    Science.gov (United States)

    Wang, Jun; Hu, Xiamin

    2014-01-01

    In a context of severe pharmaceutical pollution, "ecopharmacovigilance" (EPV) has been an area of novel interest. It aims to ensure that significant environmental issues associated with pharmaceuticals in the environment are identified in a timely way, and managed appropriately. EPV has become a research hotspot as a comprehensive and boundary science in Europe and North America, and regulatory requirements governing the comprehensive environmental risk assessment (ERA) of pharmaceuticals exist in these regions. A speedy Chinese pharmaceutical industry development and drug consumption, China should shoulder more international responsibility and contribute to the worldwide EPV. Compared to the west, EPV in China is in its infancy. We analyzed the current state of EPV-related practice in China and found that many efforts have been made by the Chinese government and specialists to control the ever-worsening environmental pharmaceutical pollution problems, including consummating related policies and regulations, revealing the occurrence and behavior of pharmaceutical residues in environment and developing new technologies to improve their removal performance. Besides, we posed some recommendations on appropriate EPV implementation that can be taken with China in future. These include, building perfect laws and regulation system on EPV, defining the evaluation index for EPV, continuing the clinical rational medication and the pharmaceutical take-back programs in China, popularizing the concept of EPV in China, and strengthening the policy-guided and scientific researches of EPV in pharmaceutical firms and academia. PMID:24550578

  18. Current status of severe acute respiratory syndrome in China

    Institute of Scientific and Technical Information of China (English)

    Qing-He Nie; Xin-Dong Luo; Jian-Zhong Zhang; Qin Su

    2003-01-01

    Severe acute respiratory syndrome (SARS), also called infectious atypical pneumonia, is an emerging infectious disease caused by a novel variant of coronavirus (SARS associated coronavirus, SARS-CoV). It is mainly characterized by pulmonary infection with a high infectivity and fatality.SARS is swept across almost all the continents of the globe, and has currently involved 33 countries and regions, including the mainland China, Hong Kong, Taiwan, North America and Europe. On June 30, 2003, an acumulative total reached 8450 cases with 810 deaths. SARS epidemic was very rampant in March, April and May 2003 in the mainland of China and Hong Kong. Chinese scientists and healthcare workers cooperated closely with other scientists from all over the world to fight the disease. On April 16, 2003, World Health Organization (WHO) formally declared that SARSCoV was an etiological agent of SARS. Currently, there is no specific and effective therapy and prevention method for SARS. The main treatments include corticosteroid therapy,antiviralagents, anti-infection, mechanical ventilation and isolation. This disease can be prevented and controlled, and it is also curable. Under the endeavor of the Chinese Government, medical staffs and other related professionals,SARS has been under control in China, and Chinese scientists have also made a great contribution to SARS research.Otherstudies in developing new detection assays and therapies, and discovering new drugs and vaccines are in progress. In this paper, we briefly review the current status of SARS in China.

  19. Current Research and Management of Ovarian Cancer in China

    Institute of Scientific and Technical Information of China (English)

    GUMeijiao; SHIWei

    2002-01-01

    Ovarian cancer is ne of the most lethal malignant tumors in China,represents the third most common cancer after cervical cancer and endometrial cancer,and the first leading cause of death from hynaecological cancers.Due to the lack of effective screening strategies and the absence of symptoms in early-stage of disease,over 70% of patients present at an advanced stage.Despite the advances in surgical techniques and conventional chemotheraphy,the prognosis of ovarian cancer has not been improved significantly,and indeed the long-term survival for patients with advanced disease does not exceed 20%.The aetiology of ovarian cancer temains poorly understood.In China,the major focus of research is to clarify the mechanism underlying ovarian cancer,develop more effective life-saving diagnostic and therapeutic measures,and undertake more population-based studies.This article summarizes current research,diagnosis and management of ovarian cancer in China.

  20. Current status and challenge of Human Parasitology teaching in China.

    Science.gov (United States)

    Peng, Hong-Juan; Zhang, Chao; Wang, Chun-Mei; Chen, Xiao-Guang

    2012-11-01

    Parasitic infection profile in China has been changed greatly with the rapid economic development in China since the 1980s, such as the tremendous decreased infection rate of the soil-borne helminthiasis, the elimination of filariasis, the control of malaria, and the initiation to eradicate malaria in 2020. Some food-borne parasitic infections have increased such as Clonorchiasis, Cysticercosis, and Echinococcosis, probably because of the increased chances of eating out. This trend directly affected the status of Human Parasitology teaching in medical universities, such as the shorten length of this course, re-adjusted contents structure and teaching manners, even the change of the name of this course. In this paper, we analyzed the current status and challenges of Human Parasitology teaching in medical universities, and discussed the requisite contents and manners in course delivery and measures to improve the quality of Human Parasitology teaching in China.

  1. The Current Status of Physical Therapy in China

    Institute of Scientific and Technical Information of China (English)

    Alice Jones; Margot A Skinner

    2013-01-01

    The current health system in China has evolved by embracing both traditional Chinese medicine and Western medicine.China is the only country in the world where the number of doctors is larger than the number of nurses but education programmes for other health professions like physical therapy have been slow to develop.In the case of physical therapy it was not until China won the bid for the Olympic Games that permission to establish the first physical therapy programme was granted.Since then China has undergone a period of rapid economic growth enabling many people to have a higher standard of living and improved health,but at the same time the country is faced with massive urbanization,industrialization,increasing environmental health threats,increased health disparities and an aging population.With the support of the Chinese Association of Rehabilitation Medicine,an increased investment by the Government in public health and rehabilitation and engagement of international education experts,entry-level education programmes for physical therapy have started to develop and there are now nine which are modeled,at least to some extent,on the World Confederation for Physical Therapy's international guidelines.The paper explores the development of physical therapy education in China and discusses possible options for the way forward so that as the demand for physical therapy to service 1.4 billion people grows,the profession is prepared and the standards expected of the entry-level physical therapist will not be compromised.

  2. China's Current Real Estate Cycle and Potential Financial Risks

    Institute of Scientific and Technical Information of China (English)

    Xiaojing Zhang; Tao Sun

    2006-01-01

    The real estate cycle and financial stability are closely correlated. In light of global real estate bubbles, China's real estate cycle has attracted wide attention since 1998. The present paper analyzes three driving factors in the context of the current real estate cycle; namely,economic growth, macroeconomic environment and institutional establishment. Supported by econometric analysis using quarterly data from 1992-2004, the present paper indicates that real estate will develop steadily and that housing prices will consistently rise in the relative long run. Based on quantitative analysis, it is concluded that the implications of the current real estate cycle for financial stability include risks of real estate credit exposure,government guarantees and maturity mismatch. Some corresponding policy implications are discussed, such as advancing banking reform, encouraging the rational behavior of local governments and strengthening the regulation of foreign capital flows in and out of China's real estate industry.

  3. Research on current e-commerce of tourism in China

    OpenAIRE

    Lei, Jun

    2016-01-01

    The rapid development of e-commerce in China has been accompanied by a similar development in tourism-based e-commerce. Taking the network as the medium, e-commerce has already become the new model for tourism transactions in the information age: By building one convenient bridge between tourism-based enterprises and tourists, can directly influence the profitability of enterprises. The paper will introduce the current development of tourism-based e-commerce websites, by firstly examining...

  4. Current status of cerebral glioma surgery in China

    Institute of Scientific and Technical Information of China (English)

    WU Jin-song; ZHANG Jie; ZHUANG Dong-xiao; YAO Cheng-jun; QIU Tian-ming; LU Jun-feng; ZHU Feng-ping; MAO Ying; ZHOU Liang-fu

    2011-01-01

    The treatment of gliomas is highly individualized.Surgery for gliomas is essentially for histological diagnosis,to alleviate mass effect,and most importantly,to favor longer survival expectancy.During the past two decades,many surgical techniques and adjuvants have been applied to glioma surgery in China,which lead to a rapid development in the field of cerebral glioma surgery.This article broadly and critically reviewed the existing studies on cerebral glioma surgery and to portrait the current status of glioma surgery in China.A literature search was conducted covering major innovative surgical techniques and adjuvants for glioma surgery in China.The following databases were searched:the Pubmed (January 1995 to date);China Knowledge Resource Integrated Database (January 1995 to date) and VIP Database for Chinese Technical Periodicals (January 1995 to date).A selection criterion was established to exclude duplicates and irrelevant studies.The outcome measures were extracted from included studies.A total of 3307 articles were initially searched.After excluded by abstracts and full texts,69 studies conducted in the mainland of China were included and went through further analysis.The philosophy of surgical strategies for cerebral gliomas in China is undergoing tremendous change.Nowadays Chinese neurosurgeons pay more attention to the postoperative neurofunctional status of the patients.The aim of the glioma surgery is not only the more extensive tumor resection but also the maximal safety of intervention.The well balance of longer overall survival and higher quality of life should be judged with respect to each individual patient.

  5. Current status of animal welfare and animal rights in China.

    Science.gov (United States)

    Lu, Jiaqi; Bayne, Kathryn; Wang, Jianfei

    2013-11-01

    In the past few years, new social passions have sparked on the Chinese mainland. At the centre of these burgeoning passions is a focus on animal welfare, animal treatment, and even animal rights, by the public and academic sectors. With China's rapid economic changes and greater access to information from around the world, societal awareness of animal issues is rising very fast. Hastening this paradigm shift were several highly public incidents involving animal cruelty, including exposés on bear bile harvesting for traditional Chinese medicine, the thousands of dogs rescued from China's meat trade, and the call to boycott shark fin soup and bird nest soup. This article outlines the current status of campaigning by animal advocates in China (specifically the animal rights movement) from three interlinked perspectives: wildlife conservation, companion animal protection, and laboratory animal protection. By reviewing this campaigning, we attempt to present not only the political and social impact of the concept of animal rights, but also the perceptions of, and challenges to, animal rights activities in China.

  6. Current human immunodeficiency virus epidemic and its response in China

    Institute of Scientific and Technical Information of China (English)

    KANG Lai-Yi

    2012-01-01

    The first patient with acquired immunodeficiency syndrome (AIDS) was identified in 1985; since then, as of October 31, 2010, a total accumulative number of 370 000 patients with human immunodeficiency virus (HIV)/AIDS have been reported. The estimated number of patients living with HIV (PLHIV) in China was 740 000 in 2009. Although China is still a low-HIV prevalence region (rate of 0.057%), the epidemic has spread more widely from the high-risk groups to the general population. This paper covers five topics of importance, i.e., current trends of the HIV epidemic; HIV-1 subtype diversity; emergence of HIV drug resistance (HIVDR); the country's response to the disease; and future challenges and additional actions needed. This paper emphasizes sexual transmission as the predominant route of transmission and it being spread more frequently among men who have sex with men; the epidemic being concentrated over particular areas in China. We also discuss the fact that diverse HIV-1 subtypes have been found throughout the entire country and that recombinant subtypes became predominant. We also explore other topics such as the possibility of HIVDR, including primary and secondary resistance, with the use of free highly active anti-retroviral therapy (HAART); the integrated strategy of HIVDR surveillance and individual clinical HIVDR testing as a new attempt in China. For many years both policy-makers and professionals (including non-governmental organizations) have expressed strong commitment to prevention, control, and care of HIV/sexual transmission infection (STI), promoted the research and conducted different actions to slow the rising trend of the HIV epidemics. Although China is facing many challenges, its citizens need to be persistent on continuing the campaign of the State Council titled "Information of Strengthening Work on Prevention and Control of AIDS".

  7. In situ observation of contour currents in the northern South China Sea: Applications for deepwater sediment transport

    Science.gov (United States)

    Zhao, Yulong; Liu, Zhifei; Zhang, Yanwei; Li, Jianru; Wang, Meng; Wang, Wenguang; Xu, Jingping

    2015-11-01

    Deepwater currents and related suspended sediment concentration were obtained by an Acoustic Doppler Current Profiler (ADCP) mooring system in the northern South China Sea from September 2011 to May 2013 to characterize the occurrence of contour currents and to evaluate their sediment transport capacity. Magnitude of the current velocity generally varied in the range of 0-2 cm/s, with a dominant flow direction of ∼250° (southwestward). The observed contour current, defined as the along-slope component of the deepwater currents, has a tunnel-like vertical structure with the largest velocity occurring in the middle of the "tunnel" and decreasing outwards. Both the magnitude and the depth range of the maximum velocity display evident inter-seasonal variations, with the strongest velocity in summer and the weakest in spring, while the thickness of the contour currents was the highest in winter and the lowest in spring. We also found that passing-through of the deep-reaching mesoscale eddies significantly affected the magnitude and direction of the contour currents. The suspended sediment concentration (SSC) estimated from echo intensities of the ADCP is the highest at the near-bottom (>400 μg/L) and decreases upwards to <10 μg/L at water depth shallower than 1750 m. High SSC is mostly observed during periods of low magnitude of the contour currents, suggesting resuspension of sediment from the seafloor is not the major controlling factor of these high-SSC events. Our observation also suggests that the major role that contour currents play is to transport sediment from the sources through keeping sediment suspended above the lower continental slope of the South China Sea.

  8. Historical and current records of aquarium cetaceans in China.

    Science.gov (United States)

    Zhang, Peijun; Sun, Ni; Yao, Zhiping; Zhang, Xianfeng

    2012-01-01

    The number of cetaceans housed in aquariums in China is increasing. Detailed information on the historical and current population status has not been reported, despite its importance for successful breeding and population management. Questionnaires were conducted between December 2006 and May 2009, and the information was used to construct studbooks. Our survey showed that 10 species had been introduced to aquariums since 1978, including 26 (with 15 in the current population) finless porpoises (Neophocaena phocaenoides), 5 (5) false killer whales (Pseudorca crassidens), 94 (80) common bottlenose dolphins (Tursiops truncatus), 48 (30) Indo-Pacific bottlenose dolphins (Tursiops aduncus), 36 (32) beluga whales (Delphinapterus leucas), 10 (10) pantropical spotted dolphins (Stenella attenuata), 8 (8) Risso's dolphins (Grampus griseus), 2 (2) short-finned pilot whales (Globicephala macrorhynchus), 2 (2) Pacific white-sided dolphins (Lagenorhynchus obliquidens), and 5 (0) baiji dolphins (Lipotes vexillifer). The number of cetaceans has increased markedly in the past 32 years, especially since 1995. Currently, 184 individuals are under human care throughout China, a number larger than any other country with an International Species Information System membership. In addition, the Annual Survival Rates of bottlenose dolphins (0.959) and beluga whales (0.968) were found higher than those reported previously (0.93-0.951 and 0.94-0.954, respectively). PMID:21674602

  9. Current situation and development of wind power in China

    Institute of Scientific and Technical Information of China (English)

    BAO Nengsheng; NI Weidou

    2007-01-01

    The current development of wind power in China was presented in this paper.Many regions such as Xinjiang Uygur Autonomous Region,Inner Mongolia Autonomous Region and southeast coastal region,etc.in China have abundant wind energy resource.At the same time,the utilization of wind power in China has been developing quickly and its prospect is promising in spite of many some obstacles.With the implementation of the Renewable Energy Law,some previous obstacles have been or are being eliminated.Much investment and many enterprises start to enter this field.In spite of this,there still exist some financial and technological obstacles.One of the technological obstacles is the stability of local power grid owing to the increasing proportion of the wind power capacity.Because the centralized development mode of wind power was adopted,the quick fluctuation of wind speed will influence the voltage and frequency stability of local power grid.In addition,large wind farm has little dispatching ability because of the uncontrollability,randomness and fluctuation of natural incoming wind.To erase these obstacles,a novel hybrid power system combining wind farm and small gas turbine power plants is discussed.

  10. Current safety practices in nano-research laboratories in China.

    Science.gov (United States)

    Zhang, Can; Zhang, Jing; Wang, Guoyu

    2014-06-01

    China has become a key player in the global nanotechnology field, however, no surveys have specifically examined safety practices in the Chinese nano-laboratories in depth. This study reports results of a survey of 300 professionals who work in research laboratories that handle nanomaterials in China. We recruited participants at three major nano-research laboratories (which carry out research in diverse fields such as chemistry, material science, and biology) and the nano-chemistry session of the national meeting of the Chinese Chemical Society. Results show that almost all nano-research laboratories surveyed had general safety regulations, whereas less than one third of respondents reported having nanospecific safety rules. General safety measures were in place in most surveyed nano-research laboratories, while nanospecific protective measures existed or were implemented less frequently. Several factors reported from the scientific literature including nanotoxicology knowledge gaps, technical limitations on estimating nano-exposure, and the lack of nano-occupational safety legislation may contribute to the current state of affairs. With these factors in mind and embracing the precautionary principle, we suggest strengthening or providing nanosafety training (including raising risk awareness) and establishing nanosafety guidelines in China, to better protect personnel in the nano-workplace.

  11. Current Status and Prospects of Natural Gas Utilization in China

    Institute of Scientific and Technical Information of China (English)

    Shi Xin

    2002-01-01

    @@ 1 Overview and Current Status of Utilization of China's Natural Gas Resources Natural gas as a green fuel with low carbon content can comply with the trend in the epoch for development of non carbonaceous energy source, and has a lot of advantages such as its abundance in resources, convenience in applica tion and cost competitiveness. The application of natural gas as a premium fuel has become a focus pursued aggres sively by international players, and the perspectives for gas demand growth will be better than that for oil globally.

  12. The current status of utilization of research reactors in China

    International Nuclear Information System (INIS)

    Seminars on utilization of research reactors were held to enhance experience exchanging among institutes and universities in China. The status of CARR (China Advanced Research Reactor) project is briefly described. The progress in BNCT program in China is introduced. (author)

  13. Current status and future tendency of lake eutrophication in China

    Institute of Scientific and Technical Information of China (English)

    JIN; Xiangcan

    2005-01-01

    Current trophic status and trend of Chinese freshwater lakes were investigated in this study. The results showed that all lakes studied were commonly undergoing the eutrophication process, water quality decreased and lake's ecosystem is being declined. Most of the urban lakes are facing serious eutrophication. Many medium-sized lakes are in metrophic or eutrophic status, some local water are even approaching the hypertrophic level. The famous five freshwater lakes in China have entered into eutrophication in the condition of higher nutrient load. Lake Taihu, Hongze and Caohu are already in eutrophic state. Eutrophic lakes are mainly distributed in the middle and lower reaches of Yangtze River and Yungui plateau. Lake eutrophication developed rapidly. Among the 34 lakes studied in 1970's, most of lakes were in the mesotrophic status,mesotrophic water area accounted for 91.8%. With the nine year of 1978-1987 the area percentage of oligotrophic lakes decreased from 3.2% to 0.53%, and that of eutrophic lakes increased from 5.0% to 55.01%. Recent data showed 57.5% lakes were in eutrophic and hypertrophic status of the 40 surveyed lakes.Eutrophic trend of Lake Taihu, Chaohu and Xuanwu in the region of the middle and lower reaches of Yangtze River was predicated using the ecological stress model. The results showed that in 2008 Lake Taihu, Chaohu and Xuanwu might be of eutrophication, eutrophication and hypertrophication, respectively if no control measurement is taken. Provided the pollution water treatment rate is 60% in 2030, approximately 30 billion ton pollution water would still be discharged directly in the lakes. Therefore, in 2030 the urban lakes in China might be eutrophication or hypertrophication, and most of the medium-sized lakes at the urban-rural fringe might be in eutrophication or hypertrophication. The famous five biggest freshwater lakes in China might be eutrophication if control countermeasures are taken as now.Lake eutrophication has become a

  14. Diagnostic analysis on the northern South China Sea winter counter-wind current

    Institute of Scientific and Technical Information of China (English)

    HONG Bo; WANG Dongxiao

    2006-01-01

    The winter counter-wind current (also named the South China Sea Warm Current (SCSWC)) in the northern South China Sea (SCS)has been known well for decades, but its mass and momentum origination have not be quantitatively evaluated before. In this paper, the high resolution three-dimensional ocean circulation model is adopted to reproduce the circulation in the northern SCS. The diagnostic analyses are performed to investigate the momentum budget in the northern SCS continental shelf/slope and the momentum propulsion of the SCSWC. It is indicated that the across-shelf pressure gradient and the across-shelf transport are responsible for the formation of the SCSWC, while the along-shelf pressure gradient is balanced by the surface stress, bottom stress, and Coriolis force. The magnitude of the terms in the along-shelf momentum equation is smaller than that in the across-shelf one.The analysis on the momentum budget in the northern SCS will benefit the marine environmental prediction in the future.

  15. Current utilization of research reactor on radioisotopes production in China

    Energy Technology Data Exchange (ETDEWEB)

    Liu Yishu [Nuclear Power Institute of China, Chengdu (China)

    2000-10-01

    The main technical parameters of the four research reactors and their current utilization status in radioisotope manufacture and labeling compounds preparation are described. The radioisotopes, such as Co-60 sealed source, Ir-192 sealed source, {gamma}-knife source, I-131, I-125, Sm-153, P-32 series products, In-113m generator, Tc-99m gel generator, Re-188 gel generator, C-14, Ba-131, Sr-89, {sup 90}Y, etc., and their labeling compounds prepared from the reactor produced radionuclides, such as I-131-MIBG, I-131-Hippure, I-131-capsul, Sm-153-EDTMP, Re-186-HEDP, Re-186-HA, C-14-urea, and radioimmunoassay kits etc. are presented as well. Future development plan of radioisotopes and labeling compounds in China is also given. Simultaneously, the possibility and methods of bilateral or multilateral co-operation in utilization of research reactor, personnel and technology exchange of radioisotope production and labeling compounds is also discussed. (author)

  16. CURRENT TECHNOLOGY AND INNOVATIONS IN FREEZE SHAFT SINKING IN CHINA

    Institute of Scientific and Technical Information of China (English)

    张铭; 翁家杰; 夏正明

    1991-01-01

    This paper gives a brief review of the development of shaft sinking by artificial ground freezing since 1949 when new China was founded. Several shaft freezing schemes which have been successfully applied from the economic and safe viewpoints are presented. Current technology and some innovative techniques,especially the shah lining which have experienced major improvements over the last four decades,are briefly reviewed. The technique of the in-situ pour concrete incorporating ailica fume with higher early strength under low temperature curing conditions is described. The temperature field in shah freezing and its finite difference solution are given in this paper. A recently developed method combining freeze wall model test with back analysis technique based on numerical simulation is also described.

  17. The Dependency of Probabilistic Tsunami Hazard Assessment on Magnitude Limits of Seismic Sources in the South China Sea and Adjoining Basins

    Science.gov (United States)

    Li, Hongwei; Yuan, Ye; Xu, Zhiguo; Wang, Zongchen; Wang, Juncheng; Wang, Peitao; Gao, Yi; Hou, Jingming; Shan, Di

    2016-08-01

    The South China Sea (SCS) and its adjacent small basins including Sulu Sea and Celebes Sea are commonly identified as tsunami-prone region by its historical records on seismicity and tsunamis. However, quantification of tsunami hazard in the SCS region remained an intractable issue due to highly complex tectonic setting and multiple seismic sources within and surrounding this area. Probabilistic Tsunami Hazard Assessment (PTHA) is performed in the present study to evaluate tsunami hazard in the SCS region based on a brief review on seismological and tsunami records. 5 regional and local potential tsunami sources are tentatively identified, and earthquake catalogs are generated using Monte Carlo simulation following the Tapered Gutenberg-Richter relationship for each zone. Considering a lack of consensus on magnitude upper bound on each seismic source, as well as its critical role in PTHA, the major concern of the present study is to define the upper and lower limits of tsunami hazard in the SCS region comprehensively by adopting different corner magnitudes that could be derived by multiple principles and approaches, including TGR regression of historical catalog, fault-length scaling, tectonic and seismic moment balance, and repetition of historical largest event. The results show that tsunami hazard in the SCS and adjoining basins is subject to large variations when adopting different corner magnitudes, with the upper bounds 2-6 times of the lower. The probabilistic tsunami hazard maps for specified return periods reveal much higher threat from Cotabato Trench and Sulawesi Trench in the Celebes Sea, whereas tsunami hazard received by the coasts of the SCS and Sulu Sea is relatively moderate, yet non-negligible. By combining empirical method with numerical study of historical tsunami events, the present PTHA results are tentatively validated. The correspondence lends confidence to our study. Considering the proximity of major sources to population-laden cities

  18. Current Status of Soil-transmitted Nematode Infection in China

    Institute of Scientific and Technical Information of China (English)

    YING-DAN CHEN; LIN-HUA TANG; LONG-QI XU

    2008-01-01

    Objective To Carry out national surveys for ascertaining the current status and trends of soil-transmitted nematode infections in China,providing scientific basis for forther developing control strategies.Methods In 1988-1992(hereinafter abbreriated as "survey in 1990"),a stratified cluster random sampling method was used in the survey.In 2001-2004(hereinafter abbreriated as "survey in 2003"),in order to compare with the survey in 1990,two-characteristic stratified cluster random sampling method was used and 687 investigation spots were sampled from the 2848 spots selected in the survey in 1990.Kato-Katz thick smear method was used to examine the eggs of soil-transmitted nematodes in fecal samples. Results The prevalence rates were 53.6% and 19.6% for soil-transmitted nematodes,14.6%and 6.120% for hookworms,44.6% and 12.7% for Ascaris lumbricoides,17.4% and 4.630% for Trichuris trichiura in survey 1990 and survey 2003,respectively.The prevalence rates of soil-transmitted nematodes were higher in 13 provinces than the average level in China in the survey in 1990.and higher in 8 provinces than the average level in the survey in 2003.The prevalence of hookworms,Ascaris lumbricoides,Trichurls trichiura and the overall prevalence of soft-transmitted nematodes were higher in females than in males.It is estimated from the results of survey in 2003 that the number of persons with soil-transmitted nematode infections in the country is about 129 million,less than that in the survey in 1990. Conclusion The prevalence of soil-transmitted nematodes has declined considerably but is still relatively high in some provinces and autonomous regions.Control activities and socioeconomic development may have contributed to the decreased prevalence.

  19. Current Status & Development Trend of VSAT Market in China

    Institute of Scientific and Technical Information of China (English)

    Xu Nutu

    2006-01-01

    @@ 1. General Status of VSAT Market Development in China 1)Development History Development in China The history of the application of satellite communication in China is not too long and it was dated from the early seventies of the 20th century. In 1973, approved by Chinese government,Ministry of Posts and Telecommunications purchased satellite earth equipment from foreign country and constructed 3 stations in Shanghai and Beijing.

  20. Current research situation of titanium alloys in China

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    Titanium and its alloys possess excellent comprehensive properties, and they are widely used in many fields. China pays great attentions to the research on new titanium alloys. This paper mainly reviews the research on new Ti alloys in China, for example, high strength and high toughness Ti alloys, burn resistant Tialloys, high temperature Ti alloys, low cost Ti alloys and so on.New basic theories on Ti alloys developed in China in recent years are also reviewed.

  1. China-Indian Silk Trade: Current Production and Future Prospects

    Institute of Scientific and Technical Information of China (English)

    Liu Feng; Sun Shimin; Qiao Xianjuan

    2009-01-01

    As an important traditional labor-inteusive industry of both India and China, the cocoon silk industry has long made great contributions to the ecological environment protection, rural economic development and the increase in export income of both countries. India is not only a very important cocoon silk trading partner, but an important production competitor of China.In recent years, there has been a large increase in the production and trade of the cocoon silk between China and India; however,China relies heavily on Indian market, which leads to a tendency of further deterioration in the silk trade environment between both countries. The present article makes an empirical study of the cocoon silk resources of the two countries and the scale, product mix and market structure of China-Indian silk trade from 2001 to 2007. Overall silk trading volumes from China to India and market concentration rate are on the increase because of the superiority of Chinese cocoon silk production over that of India. Owing to scat-tered market share and export that mainly focused on raw materi-als product, there has been a phenomenon of price reduction and quantity increase. India carries out fierce competition with China in the international market and even imposes antidumping sanction on Chinese silk, which are key factors restricting further increase between China-India trade. Based on the abovementioned facts, the authors aim to put forward suggestions for steadily developing the production and trade of China's silk.

  2. Observed sub-inertial current variability and volume transport over the continental shelf in the northern South China Sea

    Science.gov (United States)

    Fang, Wendong; Guo, Pu; Liu, Changjian; Fang, Guohong; Li, Shujiang

    2015-05-01

    Sub-inertial currents (SICs) over the continental shelf of the northern South China Sea (NSCS) are investigated using the in-situ current observations of acoustic Doppler current profiler (ADCP) mooring arrays off the Pearl River Estuary in 2006 and 2007. The survey was carried out in four separate time periods: summer, winter, spring (before the onset of the southwesterly monsoon), and fall (after the establishment of the northeasterly monsoon). The observations showed that the current directions were generally along the shelf, consistent with the directions of monsoonal winds. The currents were also affected by a few of mesoscale eddy events. In summer 2006, the volume transport was northeastward with a mean magnitude of 1.4 Sv through a cross-shelf section from the site of the depth of 135 m to the coast; in winter 2006/2007, spring 2007 and fall 2007, the volume transports were all southwestward with magnitudes of 2.0, 2.1, and 0.9 Sv, respectively, through a cross-shelf section from the site of the depth of 290 m to the coast. The standard deviations of the SICs were generally smaller than the velocities of the mean currents, and the variability of SICs showed significant correlation with the local sea surface winds. No persistent counter-wind currents were observed in the study area during the fall and winter observational periods.

  3. Current Status and Future Development of Integrated Geophysical Technology in China

    Institute of Scientific and Technical Information of China (English)

    HeZhanxiang

    2003-01-01

    The gap between China''s integrated geophysical technology and the world''s advanced technologies has been significantly narrowed as the result of developments in the last decade.The new technology has played a very important role in oil and gas exploration in China, especially for the purposes of targeting seismically opaque zones, decreasing exploration risk, and improving exploration efficiency in the western territories and complex areas in China. The current status and future development of non-seismic integrated geophysical teams in China is discussed.

  4. Current Status and Prospects of Biomass Energy Industry in China

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    At present biomass energy industry is in its infancy in China and it has a bright future. Biomass energy production used grain as raw materials has entered industrialization phase.Some key technologies of biomass energy industry are coming to mature.China has issued relevant industrial standards laws and regulations,and has provided support in finance,loan,tax,etc.But China's biomass energy industry is faced with many problems which need to be solved.For example,taking grain as raw materials is unsustain...

  5. Current Situation of Preschool Immersion Programs in China

    Institute of Scientific and Technical Information of China (English)

    李林蔚

    2014-01-01

    English Immersion programs in China have become a popular choice among parents for their children since the intro-duction of the Canadian model to the Chinese school system in 1997. English Immersion programs in China differ from tradition-al English instruction because in such programs content-based language programs are designed to immerse Chinese students in English and promote their communicative skills. From the perspective of Education and Applied Linguistics, this essay tries to study the idea and practice of English Immersion programs in China on preschool children in the perspective of the conception, theoretical foundation, foreseeable problems, etc., in order to make a thorough inquiry of their feasibility.

  6. Current Status and Prevention Strategy for Coal-arsenic Poisoning in Guizhou, China

    OpenAIRE

    Li, Dasheng; An, Dong; Zhou, Yunsu; Liu, Jie; Waalkes, Michael P.

    2006-01-01

    Arsenic exposure from burning coal with high arsenic contents occurs in southwest Guizhou, China. Coal in this region contains extremely high concentrations of inorganic arsenic. Arsenic exposure from coal-burning is much higher than exposure from arsenic-contaminated water in other areas of China. The current status and prevention strategies for arsenic poisoning from burning high-arsenic coal in southwest Guizhou, China, is reported here. Over 3,000 arsenic-intoxicated patients were diagnos...

  7. Pharmacovigilance in China: current situation, successes and challenges.

    Science.gov (United States)

    Zhang, Li; Wong, Lisa Y L; He, Ying; Wong, Ian C K

    2014-10-01

    With the integration of the global pharmaceutical economy and the gradual transformation of the healthcare insurance system in China, the legislative framework for a comprehensive regulatory system monitoring the whole process including drug development, manufacture, distribution and use has been established by the China Food and Drug Administration (CFDA) to ensure the safety and effectiveness of medication use. China has established a relatively comprehensive pharmacovigilance system covering regulation, organisation and technology from 1989 to 2014. As of 2013, one national centre, 34 provincial centres and more than 400 municipal centres for adverse drug reaction (ADR) monitoring were included in the four-level pharmacovigilance network (national, provincial, municipal and county) with more than 200,000 grassroot organisation users. The China Adverse Drug Reaction Monitoring System (CADRMS) is an online spontaneous reporting system which connects the four-level pharmacovigilance network. By 2013, CADRMS had received over 6.6 million ADR case reports. After integrating and analysing pharmacovigilance data, the National Centre for ADR Monitoring (NCADRM) publishes medication safety information by releasing ADR bulletins, National ADR Annual Reports and International Pharmacovigilance Newsletters. The NCADRM also routinely provides CADRMS data feedback to manufacturers. The CFDA implemented risk management through several approaches, including arranging 'manufacturer communication meetings', modification of medication package inserts, and restriction, suspension or withdrawal of marketing authorisations. Seamless information exchange with overseas regulatory authorities and organisations remains an area for improvement. Further development of the China pharmacovigilance system in terms of signal generation, post-marketing pharmacoepidemiology research and education is also needed.

  8. Current state of sludge production, management, treatment and disposal in China.

    Science.gov (United States)

    Yang, Guang; Zhang, Guangming; Wang, Hongchen

    2015-07-01

    Large amount of sludge has been a great trouble and raised significant concerns in China. This paper reviewed the current situation of sludge production, management, treatment and disposal in China. Total sludge production in China had an average annual growth of 13% from 2007 to 2013, and 6.25 million tons dry solids was produced in 2013. Per Capita sludge production in China is lower than that in developed countries. However, sludge management is poor in China. Administrative agents of sludge are not in accordance with each other. Laws and regulations of sludge management are incomplete and sometimes unrealistic. As to sludge treatment and disposal, many technical routes have been applied in China. Thickening, conditioning, and dewatering are three most used treatment methods, while application ratios of stabilization and drying are low in China. More than 80% of sludge is disposed by improper dumping in China. Regarding proper disposal, sanitary landfill is the commonest, followed by land application, incineration and building materials. According to the overall situation of China, "thickening-anaerobic digestion-dewatering-land application" is the priority technical route of sludge treatment and disposal. Good changes, current challenges and future perspectives of this technical route in China were analyzed and discussed in details.

  9. A brief review on current progress in neuroscience in China

    Institute of Scientific and Technical Information of China (English)

    QIANG Min; WU BeiBei; LIU Ying

    2011-01-01

    Neuroscience has been undergoing a rapid development in China since the beginning of the 21 st century.Chinese scientists are working on neuroscience and getting more and more important results.As described by Poo Mu-ming [1],the increasing funding support,the flood of returning overseas researchers and numerous international conferences held in China give birth to the springtime of neuroscience in China.The development of nervous system and neural cells The nervous system is a complex network of axonal projections and synaptic connections [2].At the early stage of neural development,besides generation of neurons and glial cells,synapse formation is the foundation of neuronal circuits and the basis of functions of nervous system including learning and memory.

  10. Current status and progress of digital orthopaedics in China

    Directory of Open Access Journals (Sweden)

    Guo-Xian Pei

    2014-07-01

    Full Text Available Based on the development of digital medicine and digital anatomy, the concept of “digital orthopaedics” was raised by Pei Guo-Xian in China in 2006. The most striking feature of digital orthopaedics is the combination of basic and clinical orthopaedic knowledge with digital technology. In this review, we summarised the development of digital orthopaedics in China in recent years with respect to: the foundation of the Chinese Association of Digital Orthopedics, virtual human project (VHP, three-dimensional (3D reconstruction, finite element simulation, navigation in orthopaedic operations, and robot-assisted orthopaedic operations. In addition, we briefly reviewed digital orthopaedics in world leading institutes. We also looked into the future of digital orthopaedics in China and proposed the major challenges in digital technology and application in orthopaedics.

  11. Current Status of Oil Distribution and Development in China

    Institute of Scientific and Technical Information of China (English)

    Zhou Qingfan

    2009-01-01

    @@ China has rich oil resources, yet relatively low-quality crude oil and difficulty in exploration and development limit the pace the oil industry will be. At present, the prospects of oil development are in a moderate mature stage, the increasing trend of high basic value in oil reserves pose a huge potential of oil exploration and development in China. The most proved reserves are distributed in big-and-middle-sized basins, and will be the main fields of undiscovered oil resources. In addition,though the degree of exploration in unconventional oil is low, its development with abundance resources will be as a significant complementary resource to conventional oil.

  12. Bibliometric Analysis of Current Web Survey Research in China

    Institute of Scientific and Technical Information of China (English)

    ZHANG Qian; SHAO Peiji; FANG Jiaming

    2008-01-01

    In recent years, with the advancement of information technology and its application in survey activities, web surveys have not only greatly developed, but have also encountered many problems in China. An analysis of domestic research is important for better understanding of web surveys, to guide further research and application. This paper gives a bibliometric analysis of 120 domestic articles on web surveys from 1998 to 2006, on publication growth, author and organization distribution, journal distribution, and research subjects. Research on web surveys in China should make progress comparable with research abroad in comparative studies, specific studies, and technical application studies.

  13. Current Situation and Challenges of Plantation Development in China

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The area of plantation in China ranks the first in the world. But, many challenges are still faced in the development of China’s plantation. A review of plantation in China was presented and the challenges were analyzed. The plantation features juvenile and middle age class with low diameter at breast height. There are the risks of pests and diseases in plantation, the potential decline in land fertility and bio-diversity, all of which are unfavorable to a healthy development of plantations.

  14. Approaches to China's Current Maritime Disputes%Approaches to China's Current Maritime Disputes

    Institute of Scientific and Technical Information of China (English)

    Wang Zaibang

    2012-01-01

    China is one of the largest Asian countries, sharing land borders with 14 countries and sea borders with 6 countries. It has a 22,000-kilometer land border, an 18,000-kilometer mainland coastline and a 14,000-kiolmeter island coastline. Maritime frontiers have a great impact on the national security of China and its relations with neighboring countries.

  15. Sudden cardiac death in China: current status and future perspectives.

    Science.gov (United States)

    Zhang, Shu

    2015-10-01

    Sudden cardiac death (SCD) is a major cause of mortality worldwide. Similar to the number of SCDs in western countries including the USA, the number of SCDs in China is ∼544,000 annually. However, there are significant differences in patient characteristics between Chinese primary prevention population and U.S. primary prevention population. In contrast to western countries where implantable cardioverter-defibrillator (ICD) devices have been well adopted as a major effective method for both primary and secondary prevention of SCD, China has a low prevalence of ICD utilization (∼1.5 device per 1 million people). Socioeconomic and political factors, awareness and knowledge of SCD, and the difference in disease patterns have led to the underutilization of ICD in China. China, as the most populated and the second largest economic country in the world, has now taken variable approaches to address this pressing health problem and enhances the delivery of lifesaving therapies, including arrhythmia ablation and medical treatment besides ICD, to patients who are at risk of SCD.

  16. Dental laboratory technology education in China: current situation and challenges.

    Science.gov (United States)

    Zheng, Liwei; Yue, Li; Zhou, Min; Yu, Haiyang

    2013-03-01

    Modern dentistry and dental education in China were first introduced from abroad by Dr. Lindsay in 1907. However, advancements in the field of dental laboratory technology did not occur to the same degree in specialties such as prosthodontics and orthodontics. Since the 1990s, orders from abroad demanding dental appliances surged as the image of China as the "world's factory" strengthened. The assembly line model, in which technicians work like simple procedure workers, was rapidly applied to denture production, while the traditional education system and apprenticeship systems demonstrated little progress in these years. The lack of advancement in dental laboratory technology education caused insufficient development in China's dental technology industry. In order to alter the situation, a four-year dental laboratory technology undergraduate educational program was established in 2005 by West China School of Stomatology, Sichuan University (WCSS, SCU). This program was based on SCU's undergraduate education and WCSS's junior college education systems. The program introduced scientific methods in relevant subjects into laboratory technicians' training and made many improvements in the availability of trained faculty, textbooks, laboratory facilities, and curriculum.

  17. Pharmacovigilance in China: current situation, successes and challenges.

    Science.gov (United States)

    Zhang, Li; Wong, Lisa Y L; He, Ying; Wong, Ian C K

    2014-10-01

    With the integration of the global pharmaceutical economy and the gradual transformation of the healthcare insurance system in China, the legislative framework for a comprehensive regulatory system monitoring the whole process including drug development, manufacture, distribution and use has been established by the China Food and Drug Administration (CFDA) to ensure the safety and effectiveness of medication use. China has established a relatively comprehensive pharmacovigilance system covering regulation, organisation and technology from 1989 to 2014. As of 2013, one national centre, 34 provincial centres and more than 400 municipal centres for adverse drug reaction (ADR) monitoring were included in the four-level pharmacovigilance network (national, provincial, municipal and county) with more than 200,000 grassroot organisation users. The China Adverse Drug Reaction Monitoring System (CADRMS) is an online spontaneous reporting system which connects the four-level pharmacovigilance network. By 2013, CADRMS had received over 6.6 million ADR case reports. After integrating and analysing pharmacovigilance data, the National Centre for ADR Monitoring (NCADRM) publishes medication safety information by releasing ADR bulletins, National ADR Annual Reports and International Pharmacovigilance Newsletters. The NCADRM also routinely provides CADRMS data feedback to manufacturers. The CFDA implemented risk management through several approaches, including arranging 'manufacturer communication meetings', modification of medication package inserts, and restriction, suspension or withdrawal of marketing authorisations. Seamless information exchange with overseas regulatory authorities and organisations remains an area for improvement. Further development of the China pharmacovigilance system in terms of signal generation, post-marketing pharmacoepidemiology research and education is also needed. PMID:25218237

  18. [SWOT Analysis of the National Survey on Current Status of Major Human Parasitic Diseases in China].

    Science.gov (United States)

    ZHU, Hui-hui; ZHOU, Chang-hai; CHEN, Ying-dan; ZANG, Wei; XIAO, Ning; ZHOU, Xiao-nong

    2015-10-01

    The National Survey on Current Status of Major Human Parasitic Diseases in China has been carried out since 2014 under the organization of the National Health and Family Planning Commission of the People's Republic of China. The National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (NIPD, China CDC) provided technical support and was responsible for quality control in this survey. This study used SWOT method to analyze the strengths, weaknesses, opportunities and threats that were encountered by he NIPD, China CDC during the completion of the survey. Accordingly, working strategies were proposed to facilitate the future field work. PMID:26931045

  19. [SWOT Analysis of the National Survey on Current Status of Major Human Parasitic Diseases in China].

    Science.gov (United States)

    ZHU, Hui-hui; ZHOU, Chang-hai; CHEN, Ying-dan; ZANG, Wei; XIAO, Ning; ZHOU, Xiao-nong

    2015-10-01

    The National Survey on Current Status of Major Human Parasitic Diseases in China has been carried out since 2014 under the organization of the National Health and Family Planning Commission of the People's Republic of China. The National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (NIPD, China CDC) provided technical support and was responsible for quality control in this survey. This study used SWOT method to analyze the strengths, weaknesses, opportunities and threats that were encountered by he NIPD, China CDC during the completion of the survey. Accordingly, working strategies were proposed to facilitate the future field work.

  20. Current status of Clonorchis sinensis and clonorchiasis in China.

    Science.gov (United States)

    Lai, De-Hua; Hong, Xiao-Kun; Su, Bi-Xiu; Liang, Chi; Hide, Geoff; Zhang, Xiaoli; Yu, Xinbing; Lun, Zhao-Rong

    2016-01-01

    The oriental liver fluke, Clonorchis sinensis, a pathogen causing clonorchiasis, is of major socio-economic importance in East Asia, including China, Korea and Vietnam. This parasite is now recognized as a biocarcinogen strongly linked to cholangiocarcinoma in humans. Here, we describe the status of clonorchiasis in China, where it has been estimated that more than 15 million patients are affected. This paper also summarizes the major advances in the field of clonorchiasis research during last decade, including diagnosis techniques, pathogenesis and genome/transcriptome/proteome studies in the last years. We strongly hope that our work can stimulate the governments of the countries or regions where clonorchiasis is endemic to pay more attention to this disease and establish related guidelines to prevent and control it. PMID:26740359

  1. Current status and perspective of percutaneous coronary intervention in China

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ The first percutaneous transluminal coronary angioplasty (PTCA) in China was performed in 1984. Since then the progresses in this field have been achieved gradually. The development process can be divided into 3 phases roughly. According to a national survey organized by Chinese Society of Cardiology,1-3 from 1984 to 1996, as the first phase, percutaneous coronary intervention (PCI) can only be performed in a few centers by a few cardiologists.

  2. The Current State of China's Freshwater Resources and Related Suggestions

    Institute of Scientific and Technical Information of China (English)

    Wu Ruijin

    2001-01-01

    China has many lakes, marshlands and rivers. Due to their uneven geographical distribution and varied degrees of salinity, their exploitable freshwater resources are limited. In the wake of the highspeed growth of national economy in recent years, human infringement upon their natural settings has been increasingly intense, leading to the degeneration of China's lacustrine ecosystems and the degradation of their surrounding environments. Lakes are shrinking and becoming more saline. In arid and semi-arid inland areas, some of them have even disappeared. In addition, lake water pollution and eutrophication in densely populated areas are getting worse, resulting in serious water shortages in some places. Silt deposition in lake basins, water surface shrinkage caused by hectic and irrational reclamation for farmland, the prevalence of flooding and water-logging calamities and ecosystem depletion caused by predatory exploitation of fishery resources, all of these have become restrictive factors in regional sustainable development. The author of this article suggests measures for the protection and sustainable exploitation of limnetic settings in China.

  3. The current situation and prospect of oil steel pipe in China

    Institute of Scientific and Technical Information of China (English)

    LI; He-lin; JI; Ling-kang; XIE; Li-hua

    2005-01-01

    The oil steel pipe in the petroleum industry is very important for its high price, large consumption volume and great effect on thedevelopment of petroleum industry. The oil steel pipe mainly includes oil well pipe (drill pipe, drill collar, casing and tubing etc. ) and oil-gas transportation pipe. This paper is an attempt to make a comprehensive review on the current situation and prospect of the oil steel pipe in China, presenting the past , today and future of the China oil pipe.The first section is a historical review of the China oil pipe. The developing course and progress of the oil steel pipe products are presented. The second section is about the current situation of the China oil pipe. The general situation of the China's steel pipe corporation and their products types,capability, etc. is introduced. The third section is about the prospect of the China oil pipe. This part mainly describes the new product research and development in China steel pipe corporations,which are facing more and more strict technical requirements of the petroleum industry in oil pipe,and reveals the prosperity of China's steel pipe corporations.

  4. Current Situation and Progress in Integrative Medicine in China

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    In the past 50 years,integration of traditional Chinese medicine and Western medicine,known as the Chinese version of integrative medicine (IM),has achieved significant developments.In this article,the present situation and progress in IM development in China are summarized from the aspects of IM application,policy making,scientific research,education,academic exchanges,and its future development.With continuous support from the Chinese government and successful scientific achievements in the past 50 years,the authors believe that IM will be moving forwards to a full globalization.

  5. Policy Risk of Current Bank Bailouts in China

    Institute of Scientific and Technical Information of China (English)

    XianxinZhao

    2004-01-01

    China's banking risk is mainly driven by "moral hazard", the inherent deficiency of state ownership. The ongoing reform strategy for state-owned banks, adopted by the government, mainly aims at this target, but fails to take a correct path. Since the government still holds the controlling right of the banks, there is no evidence to show that recapitalization and initial public offering (IPO) will lead to sound practices for banking governance. Furthermore, in order to accelerate the recapitalization process, the reformers have injected a large amount of foreign exchange reserves into the state-owned banks, which consequently expands money supply and will lead to instability of future economic growth. Our conclusion is that there is a latent banking risk. China's banking reform should be in line with the external environment and the overall economic reform process, and the reformers should always keep in mind that sustainability of future economic growth is the ultimate means by which banking risk can be cushioned and absorbed.

  6. Insecticide cytotoxicology in China: Current status and challenges.

    Science.gov (United States)

    Zhong, Guohua; Cui, Gaofeng; Yi, Xin; Sun, Ranran; Zhang, Jingjing

    2016-09-01

    The insecticide cytotoxicology, as a new branch of toxicology, has rapidly developed in China. During the past twenty years, thousands of investigations have sprung up to evaluate the damages and clarify the mechanisms of insecticidal chemical substances to insect cells in vivo or in vitro. The mechanisms of necrosis, apoptosis or autophagy induced by synthetic or biogenic pesticides and virus infections have been systematically illuminated in many important models, including S2, BmN, SL-1, Sf21 and Sf9 cell lines. In addition, a variety of methods have also been applied to examine the effects of insecticides and elaborate the modes of action. As a result, many vital factors and pathways, such as cytochrome c, the Bcl-2 family and caspases, in mitochondrial signaling pathways, intracellular free calcium and lysosome signal pathways have been illuminated and drawn much attention. Benefiting from the application of insecticide cytotoxicology, natural products purifications, biological activities assessments of synthetic compounds and high throughput screening models have been accelerated in China. However, many questions remained, and there exist great challenges, especially in theory system, evaluation criterion, evaluation model, relationship between activity in vitro and effectiveness in vivo, and the toxicological mechanism. Fortunately, the generation of "omics" could bring opportunities for the development of insecticide cytotoxicology. PMID:27521907

  7. Current trends in China's coal mining industry; Aktuelle Entwicklungen im Steinkohlebergbau Chinas

    Energy Technology Data Exchange (ETDEWEB)

    Goerlich, B.J. [Deutsche Montan Technologie GmbH, Essen (Germany)

    2004-07-01

    It's not only its role as a coal producer which makes China to the subject of talks everywhere. China has a high economic growth despite of the global economical crisis and SARS. China shows highest scientific and technical performance, e.g. with the space flight of the first Chinese astronaut. The Transrapid is running in Shanghai, in 2003 Volkswagen has sold more cars in China than in Germany and, statistically, 2,5 Chinese share one cell phone, i.e. presently there are 500 million cell phones in China, tendency increasing. Observing the developments in Beijing or even better in Shanghai, Shenzen, Guoangou (Kanton) gives you a feeling for dynamics and economic growth which we have been missing in Germany for a long time. This national economy has been growing rapidly thus increasing also the hunger for energy. To feed this hunger is one of the main tasks of the Chinese central government; this is the only way to maintain the economic growth in the future. The economic growth is needed urgently if the changes in economy are to be implemented by the WTO and globalisation of the markets. China needs an economic growth rate of 8% in order to create new jobs needed to make for the ones breaking away in the old, government-controlled enterprises due to the new orientation in its industry. As mentioned before: energy and especially hard coal are key and engine of this development. [German] China ist nicht nur als Kohleproduzent derzeit in aller Munde. Es verfuegt ueber ein hohes Wirtschaftswachstum, trotz globaler Wirtschaftskrise und SARS. China zeigt wissenschaftlich/technische Hoechstleistung, beispielsweise mit dem Flug des 1. chinesischen Astronauten ins All. Der Transrapid faehrt in Shanghai, VW verkaufte 2003 mehr Autos in China als in Deutschland und 2,5 Chinesen teilen sich statistisch ein Mobiltelefon - es gibt also derzeit ca. 500 Mio. Mobiltelefone allein in China, Tendenz weiter steigend. Beobachtet man die Entwicklung Pekings oder noch besser die von

  8. Study on the Current Capital Management of China Modern Enterprises

    OpenAIRE

    Lijie Sha; Yang Li

    2009-01-01

    The current capital management of the enterprise mainly includes cash management, accounts receivable management and inventory management. The following methods should be selected to strengthen the current capital management of modern enterprises, which includes reasonably allocating capitals, really enhancing the cash using efficiency, strengthening the accounts receivable management, revitalizing the capital turnover, emphasizing the inventory management and striving for the unification of ...

  9. Investigation and Analysis of Current Writing Teaching Mode among English Majors in Normal Universities in China

    Science.gov (United States)

    Zeng, Hang-li

    2010-01-01

    This paper has made an investigation on the current writing teaching mode among English majors in normal universities in China, by means of questionnaire, interview and class observation. The study finds out that the current writing teaching mode is not purely product approach or process approach. In fact, the two approaches to writing co-exist in…

  10. Research on the Vegetable Trade Current Situation and Its Trade Competitiveness in China

    OpenAIRE

    LI Shasha

    2013-01-01

    International audience This paper analyzed the Current situation and status of China in the world vegetable trade, measured and analyzed main export varieties of vegetables trade competitiveness in China by using international market share(IMS) and trade competitiveness index(TCI). The conclusion is that: China’s vegetable export scale expands gradually, frozen vegetables, dehydrated vegetables, and dried vegetables have significant comparative advantages and hold high stability in the int...

  11. Current status and development of traumatic brain injury treatments in China

    Institute of Scientific and Technical Information of China (English)

    Baiyun Liu

    2015-01-01

    Due to its high incidence,high disability rate,and high mortality rate,traumatic brain injury (TBI) poses a serious threat to human health.This manuscript describes the urgent problems currently existing in China's TBI treatment and proposes a scheme of a nationwide collaboration platform for the treatment of TBI so as to improve the overall level of TBI treatment in China,and reduce disability and mortality rates in TBI patients.

  12. Study on Difficulties and Development Directions of Current Human Resource Management in China

    OpenAIRE

    Faping He

    2009-01-01

    With the implementing of Labor Contract Law of the PRC in 2008, the development of China human resource management will face very austere challenge and encounter unexpected difficulties. The human resource management of China is developed under the backgrounds without the pressure of labor union and legal restriction, which makes enterprises adopt the single and employer-oriented development mode of the human resource management and rarely consider employees’ benefits. The current human resou...

  13. Current Status and Future Strategies for Development of Transgenic Plants in China

    Institute of Scientific and Technical Information of China (English)

    De-Ping Wang

    2007-01-01

    In this review, the author summarized the current status, challenges, and strategies in China in the development of transgenic plants and its commercialization. Based on sets of successful examples and data achieved from execution of the National Special Project for Transgenic Plant Research and Commercialization in the last five years, the priorities and key directions were put forward for the future development of transgenic plants in China.

  14. China & India - Analysing The Current & Anticipating the Future Asian Security Structure

    OpenAIRE

    Ølgaard, Daniel Møller; Gill, Tina S.L.; Sousa, David; Löchte, Ida; Wasiq, Mujeeb; Maximillian, Lukas Müller

    2012-01-01

    This project investigates the positions of India and China in the context of the Asian region. Our focus on these two states owes to their currently increasing relevance as economies and powers. In order to analyse them in their regional context, we apply the Regional Security Complex Theory by Barry Buzan and seek to answer two questions: By focusing on China and India, what is the current security structure of the Asian regional security complex (RSC)? And based on this, what is the most li...

  15. Current status, crisis and conservation of coral reef ecosystems in China

    Directory of Open Access Journals (Sweden)

    ShaoHong Wu

    2012-03-01

    Full Text Available Harboring rich marine species and playing important ecological functions, coral reef ecosystems have attracted widespread concern around the world. Ecosystem diversity, conservation and management of coral reefs are becoming a hot research area. Coral reefs in China are mainly distributed in the South China Sea and Hainan, Taiwan, Hong Kong, Guangdong, and Guangxi coastal waters. In recent years, due to the global climate change and the growing impact of human activities, coral reef biodiversity in China have been reducing and the ecological functions of coral reef ecosystems are severely degenerating. In this paper we summarized the current status, crisis and conservation of coral reef ecosystems in China. Some progress in coral reef research was discussed.

  16. Current situation and development tendency of thermal spraying materials in China

    Institute of Scientific and Technical Information of China (English)

    YU; Yue-guang

    2005-01-01

    The current situations of thermal spraying materials in China are described in this paper.The thermal spraying technology in China has a great progress over tens of years. More than one hundred varieties of material products serve thermal spraying producing now. They belong to three kinds, powders,wires and rods. Technologies for producing alloy, ceramic and composite powders, alloy and cored wires,and oxide ceramic rods are applied to large-scale production. Many research and development works on advanced materials for thermal spraying are carrying out recent years. They show that the general tendencies of thermal spraying materials in China are composite or low-impurity component, ultrafine or nanosized microstructure, high properties, and specialized and systematized applications. Thermal spraying materials have great prospects with the development of saving society in China.

  17. Higher Education Research as a Field in China: Its Formation and Current Landscape

    Science.gov (United States)

    Chen, Shuang-Ye; Hu, Li-Fang

    2012-01-01

    This paper outlines the field of higher education research in China from its historical roots through to its current development. It is a case study of how the field of higher education research emerged and was co-constructed by the state and the academic community of higher education researchers to become an established and recognised discipline…

  18. Issues and Problems in the Current Development of Vocational Education in China

    Science.gov (United States)

    Shi, Weiping

    2013-01-01

    Chinese vocational education is currently in its most optimal development period in history. This article discusses several challenges of different dimensions faced by vocational education in China as it develops, such as scale versus quality, development goals, a lifelong vocational education system, and creating model institutions; and puts…

  19. Municipal solid waste (MSW) as a renewable source of energy: current and future practices in China.

    Science.gov (United States)

    Cheng, Hefa; Hu, Yuanan

    2010-06-01

    With rapid economic growth and massive urbanization, China faces the problem of municipal solid waste (MSW) disposal and the pressing need for development of alternative energy. Waste-to-energy (WTE) incineration, which recovers energy from discarded MSW and produces electricity and/or steam for heating, is recognized as a renewable source of energy and is playing an increasingly important role in MSW management in China. This article provides an overview of the WTE industry, discusses the major challenges in expanding WTE incineration in China, namely, high capital and operational costs, equipment corrosion, air pollutant emissions, and fly ash disposal. A perspective on MSW as a renewable energy source in China is also presented. Currently, only approximately 13% of MSW generated in China is disposed in WTE facilities. With the significant benefits of environmental quality, the reduction of greenhouse gas (GHG) emissions, and government policies and financial incentives as a renewable energy source, WTE incineration industry is expected to experience significant growth in the coming decade and make greater contribution to supplying renewable energy in China. PMID:20137912

  20. How China's Leaders Think The Inside Story of China's Past, Current and Future Leaders

    CERN Document Server

    Kuhn, Robert Lawrence

    2011-01-01

    How China’s next generation of leaders think and what that means for its future China will soon undergo a complete change of senior leaders and this book covers that new generation’s background and ideas based on personal interviews with member of China’s ruling party. It covers the future of state media, culture, the press, religion, science and technology, healthcare, agricultural, and economic and financial issues. For anyone who wants to understand China’s future, this book offers valuable insight.

  1. A few perspectives of solar physics research in China - current status and future

    Science.gov (United States)

    Wang, Jingxiu; Ding, Mingde; Ji, Haisheng; Deng, Yuanyong; Liu, Yu; Liu, Zhong; Qu, Zhongquan; Wang, Huaning; Xia, Lidong; Yan, Yihua

    2016-07-01

    Solar physics research as an important discipline in astrophysics in China aims at improving the understanding of origin and variation of solar magnetic field and magnetic activity, and founding the basis for forecast of disastrous space weather. The current review is focused on the solar physics research in China in recent three years. Highlights in scientific research in solar magnetism, magnetic activity, coronal plasma, and space weather forecast are briefly summarized. Key advances in instrument development are reported in some necessary details. Future tendency and working direction are considered and discussed.

  2. [Current problems and challenges in the diagnosis and treatment of colorectal cancer in China].

    Science.gov (United States)

    Wang, Jianping; Wang, Lei

    2014-06-01

    In the past 20 years, researches regarding colorectal cancer have experienced unprecedented boom in China. However, a seris problems have been exposed, including a rapid increase in morbility, the geographical limitations of tumor screening, nonstandard diagnosis and treatment, very limited mechanism researches, and lack of randomized controlled clinical trials with Chinese characteristics. This article puts forward some main emphases of the current work, based on the above problems and challenges, in order to improve the overall level of the diagnosis and treatment of colorectal cancer in China.

  3. New features in current information work of nuclear power of China

    International Nuclear Information System (INIS)

    Currently, China is accelerating the nuclear power construction and developing nuclear energy research. China has possessed the ability to independently develop nuclear power. So, Scientific and technological work and information work in the field of nuclear power of China show new features. Based on the new features of nuclear power development, related information work is also developing further and extending in a wide range. Collection and construction of nuclear power information resources and service modes change. Based on the demands of users resource and service modes changes based on the demands of users, information workers should provide an active service by fully using various advanced information techniques, and quickly and accurately deliver the required information to the user, which is the direction of the information services. (author)

  4. Cesarean section in the People’s Republic of China: current perspectives

    Directory of Open Access Journals (Sweden)

    Feng XL

    2014-01-01

    Full Text Available Xing Lin Feng,1 Ying Wang,1 Lin An,2 Carine Ronsmans3 1Department of Health Policy and Administration, School of Public Health, Peking University, Beijing, People’s Republic of China; 2Department of Women, Children and Adolescent Health, School of Public Health, Peking University, Beijing, People’s Republic of China; 3Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, England Objective: To review the current knowledge on the prevalence, reasons, and consequences of cesarean sections in the People’s Republic of China. Methods: Peer-reviewed articles were systematically searched on PubMed. The following Chinese databases were comprehensively searched: the China National Knowledge Infrastructure, Wanfang, and the VIP information. The databases were searched from inception to September 1, 2013. Two reviewers independently screened the titles and abstracts for eligibility. Full texts of eligible papers were reviewed, where relevant references were hand-searched and reviewed. Findings: Sixty articles were included from PubMed, 17 articles were intentionally picked out from Chinese journals, and five additional articles were added, for a total of 82 articles for the analysis. With a current national rate near 40%, the literature consistently reported a rapid rise of cesarean sections in the People’s Republic of China in the past decades, irrespective of where people lived or their socioeconomic standing. Nonclinical factors were considered as the main drivers fueling the rise of cesareans in the People’s Republic of China. There was a lively debate on whether women’s preferences or providers’ distorted financial incentives affected the rise in cesarean sections. However, recent evidence suggests that it might be the People’s Republic of China’s health development approach – focusing on specialized care and marginalizing primary care – that is playing a role. Although 30 articles

  5. Vehicle-use intensity in China: Current status and future trend

    International Nuclear Information System (INIS)

    Vehicle-use intensity (kilometers traveled per vehicle per year or VKT) is important because it directly affects simulation results for vehicle fuel use and emissions, but the poor understanding of VKT in China could significantly affect the accuracy of estimation of total fuel use and CO2 emissions, and thus impair precise evaluation of the effects of associated energy and environmental policies. As an important component of our work on the Fuel Economy and Environmental Impacts (FEEI) model, we collected VKT survey data in China from available sources and conducted additional surveys during 2004 and 2010, from which we derived VKT values and VKT-age functions by vehicle type for China. We also projected the future VKT for China by examining the relationship of vehicle use to per-capita GDP in 20 other countries worldwide. The purpose of this work is to achieve a better understanding of vehicle-use intensity in China and to generate reliable VKT input (current and future VKT levels) for the FEEI model. The VKT results obtained from this work could also benefit other work in the field associated with vehicle energy use and emissions. - Highlights: ► VKT is key in estimating fuel use and emissions, but its knowledge is poor in China. ► We determined VKT in China from available survey data and the surveys we conducted. ► VKT-age functions by vehicle type were derived from the surveys we conducted. ► Future VKT was projected based on vehicle use to per-capita GDP in 20 countries.

  6. An Objective Analysis Method for Surface Residual Current Field in the East China Seas

    Institute of Scientific and Technical Information of China (English)

    WANG Qiang; WANG Cizhen

    2003-01-01

    Since the volume transport across the pycnocline is much smaller than that in the mixed layer, the current in the mixed layer can be regarded as non-divergent. An objective analysis method is deduced based on this hypothesis. The linear combination method is used to solve the non-divergent component of the current field of an ocean basin containing islands,which is equivalent to a mathematical problem of solving a Poisson equation in a multi-connected domain. The method is applied to the Bohai Sea, the Yellow Sea and the East China Sea (ECS). The modeled result is consistent with the current maps constructed by other oceanographers.

  7. NUMERICAL STUDY ON THE FORMATION OF THE SOUTH CHINA SEA WARM CURRENT I. BAROTROPIC CASE

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    In this work, Princeton Ocean Model (POM) was used to study the formation of the South China Sea Warm Current (SCSWC) in the barotropic case. Monthly averaged wind stress and the inflow/outflow transports in January were used in the numerical simulation which reproduced the SCSWC. The effects of wind stress and inflow/outflow were studied separately. Numerical experiments showed that the Kuroshio intrusion through the Luzon Strait and the slope shelf in the northern SCS are necessary conditions for the formation of the SCSWC. In a flat bottom topography experiment, the wind stress driven northeast current in the northern SCS is a compensatory current.

  8. Teleseismic magnitude relations

    Directory of Open Access Journals (Sweden)

    Markus Båth

    2010-02-01

    Full Text Available Using available sets of magnitude determinations, primarily from Uppsala seismological bulletin, various extensions are made of the Zurich magnitude recommendations of 1967. Thus, body-wave magnitude (m and surface-wave magnitudes (M are related to each other for 12 different earthquake regions as well as world-wide. Depth corrections for M are derived for all focal depths. Formulas are developed which permit calculation of M also from vertical component long-period seismographs. Body-wave magnitudes from broad-band and narrow-band short-period seismographs are compared and relations deduced. Applications are made both to underground nuclear explosions and to earthquakes. The possibilities of explosion-earthquake discrimination on the basis of magnitudes are examined, as well as the determination of explosive yield from magnitudes. For earthquakes, relations between magnitudes of main earthquakes and largest aftershocks are investigated. A world-wide station network for more homogeneous magnitude determinations is suggested in order to provide the necessary reference system.

  9. Current management of intracerebral haemorrhage in China: a national, multi-centre, hospital register study

    Directory of Open Access Journals (Sweden)

    Heeley Emma L

    2011-01-01

    Full Text Available Abstract Background We aimed to examine current practice of the management and secondary prevention of intracerebral haemorrhage (ICH in China where the disease is more common than in Western populations. Methods Data on baseline characteristics, management in-hospital and post-stroke, and outcome of ICH patients are from the ChinaQUEST (QUality Evaluation of Stroke Care and Treatment study, a multi-centre, prospective, 62 hospital registry in China during 2006-07. Results Nearly all ICH patients (n = 1572 received an intravenous haemodiluting agent such as mannitol (96% or a neuroprotectant (72%, and there was high use of intravenous traditional Chinese medicine (TCM (42%. Neurosurgery was undertaken in 137 (9% patients; being overweight, having a low Glasgow Coma Scale (GCS score on admission, and Total Anterior Circulation Syndrome (TACS clinical pattern on admission, were the only baseline factors associated with this intervention in multivariate analyses. Neurosurgery was associated with nearly three times higher risk of death/disability at 3 months post-stroke (odd ratio [OR] 2.60, p Conclusions The management of ICH in China is characterised by high rates of use of intravenous haemodiluting agents, neuroprotectants, and TCM, and of antihypertensives for secondary prevention. The controversial efficacy of these therapies, coupled with the current lack of treatments of proven benefit, is a call for action for more outcomes based research in ICH.

  10. Photonics industry in China: from current status and trends to the importance of innovation

    Science.gov (United States)

    Fan, Chongcheng

    2011-12-01

    Current status and trends in various sectors of photonics industry in Mainland China are reviewed, which includes optical fiber communication, optical preform, fiber and cable, photonic devices and chips, LED illumination and display, and photovoltaics. Then, from the challenges and risks they are facing, critical importance of innovation is discussed. In the evolving Innovation Economy, the core competence of a company, an industry or a country is its innovation power and the capability to grab (and manage) talented people.

  11. Past, current and future water footprints, water scarcity and virtual water flows in China

    OpenAIRE

    Zhuo, La

    2016-01-01

    The increasing water consumption as a result of population growth and economic development, especially in fast growing developing countries, puts an increasing strain on the sustainable use of the globe’s finite freshwater resources and poses a key challenge for the future. The objective of the thesis is to evaluate past, current and future water footprints (WFs), water scarcity and virtual water (VW) flows at both river basin and national level in China, focusing on the agricultural sector, ...

  12. Individual Monitoring and Occupational Dose Record Management in China: History, Current Status and Perspectives.

    Science.gov (United States)

    Wang, Hong-Bo; Yu, Hai-Tao; Sun, Quan-Fu

    2016-06-03

    This review paper presents an overview of individual monitoring, as well as the national dose register and dose record management of radiation workers in China. Progress has recently been made on the individual monitoring of radiation workers. A critical analysis of current status and problems in individual monitoring is also presented and necessary future research on individual monitoring, such as the monitoring technology in the form of the ring dosimeters and eye lens dosimeters, is suggested.

  13. Individual Monitoring and Occupational Dose Record Management in China: History, Current Status and Perspectives.

    Science.gov (United States)

    Wang, Hong-Bo; Yu, Hai-Tao; Sun, Quan-Fu

    2016-01-01

    This review paper presents an overview of individual monitoring, as well as the national dose register and dose record management of radiation workers in China. Progress has recently been made on the individual monitoring of radiation workers. A critical analysis of current status and problems in individual monitoring is also presented and necessary future research on individual monitoring, such as the monitoring technology in the form of the ring dosimeters and eye lens dosimeters, is suggested. PMID:27271646

  14. Individual Monitoring and Occupational Dose Record Management in China: History, Current Status and Perspectives

    Directory of Open Access Journals (Sweden)

    Hong-Bo Wang

    2016-06-01

    Full Text Available This review paper presents an overview of individual monitoring, as well as the national dose register and dose record management of radiation workers in China. Progress has recently been made on the individual monitoring of radiation workers. A critical analysis of current status and problems in individual monitoring is also presented and necessary future research on individual monitoring, such as the monitoring technology in the form of the ring dosimeters and eye lens dosimeters, is suggested.

  15. Individual Monitoring and Occupational Dose Record Management in China: History, Current Status and Perspectives

    OpenAIRE

    Hong-Bo Wang; Hai-Tao Yu; Quan-Fu Sun

    2016-01-01

    This review paper presents an overview of individual monitoring, as well as the national dose register and dose record management of radiation workers in China. Progress has recently been made on the individual monitoring of radiation workers. A critical analysis of current status and problems in individual monitoring is also presented and necessary future research on individual monitoring, such as the monitoring technology in the form of the ring dosimeters and eye lens dosimeters, is sugges...

  16. Individual Monitoring and Occupational Dose Record Management in China: History, Current Status and Perspectives

    Science.gov (United States)

    Wang, Hong-Bo; Yu, Hai-Tao; Sun, Quan-Fu

    2016-01-01

    This review paper presents an overview of individual monitoring, as well as the national dose register and dose record management of radiation workers in China. Progress has recently been made on the individual monitoring of radiation workers. A critical analysis of current status and problems in individual monitoring is also presented and necessary future research on individual monitoring, such as the monitoring technology in the form of the ring dosimeters and eye lens dosimeters, is suggested. PMID:27271646

  17. Current status and perspective of diagnosis and treatment of thoracolumbar fracture in China

    Institute of Scientific and Technical Information of China (English)

    唐天驷; 俞杭平

    2003-01-01

    @@ Since the late 20th century owing to the improvement of spinal surgery techniques, the diagnosis and treatment of thoracolumbar fracture have been perfected more and more. Although the advent of modern spinal surgery in China was late, we have gained some advanced achievements owing to various international communications benefited from the open policy. Therefore, it is essential to evaluate the current status and perspective of diagnosis and treatment of thoracolumbar fracture. There are several issues we would like to discuss here.

  18. Bidirectional Modulation of Numerical Magnitude.

    Science.gov (United States)

    Arshad, Qadeer; Nigmatullina, Yuliya; Nigmatullin, Ramil; Asavarut, Paladd; Goga, Usman; Khan, Sarah; Sander, Kaija; Siddiqui, Shuaib; Roberts, R E; Cohen Kadosh, Roi; Bronstein, Adolfo M; Malhotra, Paresh A

    2016-05-01

    Numerical cognition is critical for modern life; however, the precise neural mechanisms underpinning numerical magnitude allocation in humans remain obscure. Based upon previous reports demonstrating the close behavioral and neuro-anatomical relationship between number allocation and spatial attention, we hypothesized that these systems would be subject to similar control mechanisms, namely dynamic interhemispheric competition. We employed a physiological paradigm, combining visual and vestibular stimulation, to induce interhemispheric conflict and subsequent unihemispheric inhibition, as confirmed by transcranial direct current stimulation (tDCS). This allowed us to demonstrate the first systematic bidirectional modulation of numerical magnitude toward either higher or lower numbers, independently of either eye movements or spatial attention mediated biases. We incorporated both our findings and those from the most widely accepted theoretical framework for numerical cognition to present a novel unifying computational model that describes how numerical magnitude allocation is subject to dynamic interhemispheric competition. That is, numerical allocation is continually updated in a contextual manner based upon relative magnitude, with the right hemisphere responsible for smaller magnitudes and the left hemisphere for larger magnitudes.

  19. TBLT IN CHINA (2001-2011: THE CURRENT SITUATION, PREDICAMENT AND FUTURE

    Directory of Open Access Journals (Sweden)

    Luo Shaoqian

    2013-01-01

    Full Text Available Abstract: With the reform of English education in China since 2001, a communicative and task-based language teaching has emerged into Chinese English classroom. To understand task-based language teaching (TBLT practice in China, a synthesis study was conducted to analyze the current situation and predicament of TBLT in China over the last ten years based on the published TBLT articles (2001-2011 in Chinese journals and educational newspapers. The study shows that there is questioning and criticism on the effectiveness of TBLT in the forein languagae teaching classes despite the amazing growth of research in TBLT in China. It is also found that the predicament of TBLT may be attributable to a variety of factors such as no professional and systematic training TBLT for teachers, little knowledge of the latest development of TBLT, differences in student English proficiency, gap between local educational levels, no enough educational funds as well as misunderstanding and mispractice of TBLT. Thus, how to appropriately adapt and localize TBLT in China has become the major concern of researchers and educators as well as teachers. To solve the problem, this paper puts forward some suggestions to localize TBLT in the Chinese context, which is concerned with (1 task design; (2 integrating target tasks and pedagogical tasks; (3 balance between meaning and form; (4 tasks for big classes; (5 developing school based textbooks and (6 combining tasks and other teaching principles. Such a context-based approach to TBLT could provide a reference for other contexts similar to China.

  20. Effect of oceanic current on typhoon-wave modeling in the East China Sea

    Institute of Scientific and Technical Information of China (English)

    Cui Hong; He Hai-Lun; Liu Xiao-Hui; Li Yi

    2012-01-01

    We use the WAVEWATCH-Ⅲ model to quantify the effect of oceanic current on typhoon-wave modeling in the East-China-Sea (ECS).Typhoons Jelawat and Saomai in the autumn of 2000 are hindcasted.The oceanic currents in the ECS are mainly constituted of Kuroshio and typhoon-generated currents.The results show distinguishable differences in wave height and wave period under the typhoon conditions.The oceanic current causes the maximum differences,of up to a 0.5 m significant wave height and a 1 s mean wave period.Comparisons between typhoons Jelawat and Saomai show the dependence of the current effect on the typhoon characteristics.

  1. Current and potential carbon stocks in Moso bamboo forests in China.

    Science.gov (United States)

    Li, Pingheng; Zhou, Guomo; Du, Huaqiang; Lu, Dengsheng; Mo, Lufeng; Xu, Xiaojun; Shi, Yongjun; Zhou, Yufeng

    2015-06-01

    Bamboo forests provide important ecosystem services and play an important role in terrestrial carbon cycling. Of the approximately 500 bamboo species in China, Moso bamboo (Phyllostachys pubescens) is the most important one in terms of distribution, timber value, and other economic values. In this study, we estimated current and potential carbon stocks in China's Moso bamboo forests and in their products. The results showed that Moso bamboo forests in China stored about 611.15 ± 142.31 Tg C, 75% of which was in the top 60 cm soil, 22% in the biomass of Moso bamboos, and 3% in the ground layer (i.e., bamboo litter, shrub, and herb layers). Moso bamboo products store 10.19 ± 2.54 Tg C per year. The potential carbon stocks reach 1331.4 ± 325.1 Tg C, while the potential C stored in products is 29.22 ± 7.31 Tg C a(-1). Our results indicate that Moso bamboo forests and products play a critical role in C sequestration. The information gained in this study will facilitate policy decisions concerning carbon sequestration and management of Moso bamboo forests in China.

  2. Computation of Wave, Tide and Wind Current for the South China Sea Under Tropical Cyclones

    Institute of Scientific and Technical Information of China (English)

    朱良生; 宋运法; 邱章; 陈秀华; 麦波强; 丘耀文; 宋丽莉

    2003-01-01

    Based on the third-generation oceanic wave prediction model (WAVEWATCH Ⅲ),the third-generation nearshore wave calculation model (SWAN) and the mathematical tide, tidal current and cyclone current model, which have been improved, interconnected and expanded, a coupled model of offshore wave, tide and sea current under tropical cyclone surges in the South China Sea has been established. The coupled model is driven by the tropical cyclone field containing the background wind field. In order to test the hindcasting effect of the mathematical model, a comparison has been made between the calculated results and the observational results of waves of 15 cyclone cases, water levels and current velocities of the of 7 cyclones. The results of verification indicate that the calculated and observed results are basically identical.

  3. Current Status and Prevention Strategy for Coal-arsenic Poisoning in Guizhou, China

    Science.gov (United States)

    An, Dong; Zhou, Yunsu; Liu, Jie; Waalkes, Michael P.

    2006-01-01

    Arsenic exposure from burning coal with high arsenic contents occurs in southwest Guizhou, China. Coal in this region contains extremely high concentrations of inorganic arsenic. Arsenic exposure from coal-burning is much higher than exposure from arsenic-contaminated water in other areas of China. The current status and prevention strategies for arsenic poisoning from burning high-arsenic coal in southwest Guizhou, China, is reported here. Over 3,000 arsenic-intoxicated patients were diagnosed based on skin lesions and urinary arsenic excretion. Non-cancerous toxicities and malignancies were much more common and severe in these patients than in other arsenic-affected populations around the world. The high incidence of cancer and arsenic-related mortality in this cohort is alarming. Chelation therapy was performed but the long-term therapeutic effects are not satisfactory. The best prevention strategy is to eliminate arsenic exposure. Funds from the Chinese Government are currently available to solve this arsenic exposure problem. Strategies include the installation of vented stoves, the use of marsh gas to replace coal, health education, the improvement of nutritional status, and the use of various therapies to treat arsenic-induced skin and liver diseases. PMID:17366768

  4. Current status and prevention strategy for coal-arsenic poisoning in Guizhou, China.

    Science.gov (United States)

    Li, Dasheng; An, Dong; Zhou, Yunsu; Liu, Jie; Waalkes, Michael P

    2006-09-01

    Arsenic exposure from burning coal with high arsenic contents occurs in southwest Guizhou, China. Coal in this region contains extremely high concentrations of inorganic arsenic. Arsenic exposure from coal-burning is much higher than exposure from arsenic-contaminated water in other areas of China. The current status and prevention strategies for arsenic poisoning from burning high-arsenic coal in southwest Guizhou, China, is reported here. Over 3,000 arsenic-intoxicated patients were diagnosed based on skin lesions and urinary arsenic excretion. Non-cancerous toxicities and malignancies were much more common and severe in these patients than in other arsenic-affected populations around the world. The high incidence of cancer and arsenic-related mortality in this cohort is alarming. Chelation therapy was performed but the long-term therapeutic effects are not satisfactory. The best prevention strategy is to eliminate arsenic exposure. Funds from the Chinese Government are currently available to solve this arsenic exposure problem. Strategies include the installation of vented stoves, the use of marsh gas to replace coal, health education, the improvement of nutritional status, and the use of various therapies to treat arsenic-induced skin and liver diseases.

  5. Current Status and Quality Assessment of Cardiovascular Diseases Related Smartphone Apps in China.

    Science.gov (United States)

    Xiao, Qian; Wang, Yanling; Sun, Liu; Lu, Sai; Wu, Ying

    2016-01-01

    To examine current status and quality of CVD related apps available for download in China, a total of 151 apps from the top popular six app stores were analyzed. Data analysis uncovered a range of issues including missing of key variables in the pre-formatted daily records, no platform for interaction with relevant healthcare professionals and undesirable user-interface design. More importantly, these apps had low levels of adherence to internationally recognized guidelines in CVD management. Overall quality score of these apps was below the average (8.08/20). This study identified areas for improvement concerning the existing CVD related apps. Information may guide the further advancement of CVD related apps and benefit CVD management in China. PMID:27332467

  6. Current status and future prospects of the development of clinical Pharmacy in China: A SWOT analysis.

    Science.gov (United States)

    Rao, Yuefeng; Zhao, Qingwei; Zhang, Xiangyi; Yang, Hongyu; Lou, Yan; Zhang, Xingguo

    2016-03-01

    In many industrialized countries, clinical pharmacy has developed into a separate discipline and become a vital part of inpatient care in hospitals. However, as compared to many established branches of medicine, clinical pharmacy is still in its infancy, with much room for growth, improvement, and recognition by both the medical community and patients. In this study, a widely-recognized development strategy analysis tool, Strength, Weakness, Opportunity and Threat (SWOT), was used to systematically address several key issues to the development of clinical pharmacy in China. This analysis aims to provide feasible recommendations for the development of clinical pharmacy in China by identifying current problems and growth opportunities. Full development of clinical pharmacy as a mature clinical discipline will help promote the rational use of drugs by both clinicians and patients and lead to enhanced drug efficacy and safety. PMID:27087089

  7. Current status and future prospects of the development of clinical Pharmacy in China: A SWOT analysis.

    Science.gov (United States)

    Rao, Yuefeng; Zhao, Qingwei; Zhang, Xiangyi; Yang, Hongyu; Lou, Yan; Zhang, Xingguo

    2016-03-01

    In many industrialized countries, clinical pharmacy has developed into a separate discipline and become a vital part of inpatient care in hospitals. However, as compared to many established branches of medicine, clinical pharmacy is still in its infancy, with much room for growth, improvement, and recognition by both the medical community and patients. In this study, a widely-recognized development strategy analysis tool, Strength, Weakness, Opportunity and Threat (SWOT), was used to systematically address several key issues to the development of clinical pharmacy in China. This analysis aims to provide feasible recommendations for the development of clinical pharmacy in China by identifying current problems and growth opportunities. Full development of clinical pharmacy as a mature clinical discipline will help promote the rational use of drugs by both clinicians and patients and lead to enhanced drug efficacy and safety.

  8. Current epidemiological profile and features of visceral leishmaniasis in people's republic of China

    Directory of Open Access Journals (Sweden)

    Wang Jun-Yun

    2012-02-01

    Full Text Available Abstract Background Visceral leishmaniasis (VL is still an important public health problem in China. In recent years endemic regions spread, prevalence increased, and even an outbreak of the disease occurred in China due to global warming and population movement. It is essential to elucidate the current epidemic situation and epidemiological characteristics of VL for designing control policy. In the present study we describe the current epidemiological profile and characteristics of VL in China based on retrospectively reviewing of VL cases reported between 2005 and 2010 by a passive surveillance system. Methods The present study was a retrospective review of VL cases notified between 2005 and 2010 based on the passive surveillance data. The data were tabulated, diagrammatized and analyzed through descriptive statistics in a Microsoft Excel spreadsheet. Results A total of 2450 VL cases were notified, with a mean of 408 cases per year. 61 counties were identified as endemic area with 2224 autochthonous cases, and the other 118 counties as non-endemic areas with 226 imported cases. 97.71% of cases were concentrated in Xinjiang, Gansu and Sichuan Provinces. 9 major counties reported a mean of > 10 cases per year, with a total of 1759 cases reported. Different types of VL revealed distinct epidemiological characteristics. Conclusions The number of VL cases and endemic counties both increased in the period 2005-2010 in China. Different type or sub-type of VL revealed distinct epidemiological characteristics. Therefore, differential control measures must be taken in different endemic areas against incidence increase and endemic area spread.

  9. Human-carnivore conflict in China: a review of current approaches with recommendations for improved management.

    Science.gov (United States)

    Pettigrew, Melissa; Xie, Yan; Kang, Aili; Rao, Madhu; Goodrich, John; Liu, Tong; Berger, Joshua

    2012-06-01

    Human-wildlife conflict (HWC) is a conservation concern that increasingly threatens the continued existence of some of the world's most endangered species. With an increase in human population, urban sprawl and subsequent encroachment on wild land, human and wildlife interaction has become inevitable. In the majority of cases, this interaction results in a negative outcome for humans, wildlife or both. In China, these key elements, along with a decrease in wild prey species, have resulted in the expansion of HWC encounters, and the need for alleviating this conflict has become a conservation priority. Loss of human life, livestock and/or crops is most often the catalysts that fuel HWC. Techniques to alleviate conflict around the world have included preventative measures and mitigation techniques, such as financial compensation and other incentive programs. Both types of measures have had variable success. We review the current status of human-carnivore conflict management in China, and, drawing lessons from around the globe, we make recommendations for improving conservation management in China. For example, an increase in law enforcement in nature reserves is vital to reducing human disturbance in prime carnivore habitat, thereby reducing conflict encounters. Also, modifications to current wildlife compensation programs, so that they are linked with preventative measures, will ensure that moral hazards are avoided. Furthermore, investigating the potential for a community self-financed insurance scheme to fund compensation and increasing efforts to restore wild prey populations will improve the outcome for wildlife conservation. Ultimately, HWC management in China will greatly benefit from an integrative approach.

  10. Human-carnivore conflict in China: a review of current approaches with recommendations for improved management.

    Science.gov (United States)

    Pettigrew, Melissa; Xie, Yan; Kang, Aili; Rao, Madhu; Goodrich, John; Liu, Tong; Berger, Joshua

    2012-06-01

    Human-wildlife conflict (HWC) is a conservation concern that increasingly threatens the continued existence of some of the world's most endangered species. With an increase in human population, urban sprawl and subsequent encroachment on wild land, human and wildlife interaction has become inevitable. In the majority of cases, this interaction results in a negative outcome for humans, wildlife or both. In China, these key elements, along with a decrease in wild prey species, have resulted in the expansion of HWC encounters, and the need for alleviating this conflict has become a conservation priority. Loss of human life, livestock and/or crops is most often the catalysts that fuel HWC. Techniques to alleviate conflict around the world have included preventative measures and mitigation techniques, such as financial compensation and other incentive programs. Both types of measures have had variable success. We review the current status of human-carnivore conflict management in China, and, drawing lessons from around the globe, we make recommendations for improving conservation management in China. For example, an increase in law enforcement in nature reserves is vital to reducing human disturbance in prime carnivore habitat, thereby reducing conflict encounters. Also, modifications to current wildlife compensation programs, so that they are linked with preventative measures, will ensure that moral hazards are avoided. Furthermore, investigating the potential for a community self-financed insurance scheme to fund compensation and increasing efforts to restore wild prey populations will improve the outcome for wildlife conservation. Ultimately, HWC management in China will greatly benefit from an integrative approach. PMID:22691204

  11. Vertical Structure of the Tidal Currents on the Continental Shelf of the East China Sea

    Institute of Scientific and Technical Information of China (English)

    LI Lei; JIANG Weiwei; LI Peiliang; YANG Bo

    2012-01-01

    The available data on tidal currents spanning periods greater than six months for the continental shelf of the East China Sea(26°30.052′N,122°35.998′E)were analyzed using several methods.Tidal Current Harmonic Analysis results demonstrated that semi-diurnal tides dominated the current movement.The tidal currents of the principal diurnal and semidiurnal rotated clockwise with depth,with the deflection of the major semi-axes to the right in the upper layer and to the left in the lower layer.The vertical structures of two principal semi-diurnal constituents-M2 and S2-were similar,which indicates that the tidal currents are mainly barotropic in this area.The main features of the variation of the four principal tidal constituents with depth demonstrate that the currents in this region are influenced by the upper and lower boundary layers.Therefore,the tidal constituents of the shallow water are similar.Different vertical modes were calculated based on the Empirical Orthogonal Function(EOF)analysis of the Eastern and Northern components of the tidal currents,with a variance contribution for the zero-order model of at least 90%.The variance contribution of the baroclinic model is minimal,which further reveals a strong barotropic character for the tidal currents of this region.

  12. Deep water bottom current deposition in the northern South China Sea

    Institute of Scientific and Technical Information of China (English)

    SHAO Lei; LI XueJie; GENG JianHua; PANG Xiong; LEI YongChang; QIAO PeiJun; WANG LiaoLiang; WANG HongBin

    2007-01-01

    There are some active bottom currents on the northern continental slope of the South China Sea (SCS). Reflection seismic profiles show that the bottom current channels occur in the water depth range of 1000 to 2700 m, extending from the NE to the SW, leading to accumulation of discontinuous drifts with higher sedimentation rates on the eastern side of the channel. The stacking pattern of the layers suggests that these drifts propagated southwestward, following the direction of the bottom currents. One sedimentary drift to the southeast of the Dongsha Islands has the highest sedimentation rate of 97cm/ka in the last 12 ka. The sedimentary characteristics of the sediment layers indicate that these bottom currents are most likley caused by the water movement of a branch of the West Pacific Ocean Current, which enters the northern SCS via the Bashi Strait. Once formed, the bottom currents transport sediments along the northern slope of SCS southwestward and finally disappear into the central basin of the SCS. Due to the bottom current activity, the deep-sea sedimentary process in the northern SCS is complex.

  13. Impacts of China's Current Appliance Standards and LabelingProgram to 2020

    Energy Technology Data Exchange (ETDEWEB)

    Fridley, David; Aden, Nathaniel; Zhou, Nan; Lin, Jiang

    2007-03-03

    The report summarizes the history and nature of China sstandardsand labeling program in the Introduction in Section 1. Trends indomestic production, exports, penetration rates, unit energy consumptionand the history of S&L technical levels by product are discussed ingreat detail in Section 2. The national energy impactsanalysis found inSection 3 concludes that overall China s standards and labeling programsreduce total electricity consumption in 2020 by an annual 106 TWh, or 16percent of what would otherwise been expected in that year in the absenceof standards and labeling programs.In total, the report concludes thatthe S&L programs currently in place in China are expected to save acumulative 1143 TWh by 2020, or 9 percent of the cumulative consumptionof residential electricity to that year. In 2020 alone, annual savingsare expected to be equivalent to 11 percent of residential electricityuse. In average generation terms, this is equivalent to 27 1-GW coalfired plants that would have required around 75 million tonnes of coal tooperate.In comparison, savings from the US appliance standards programalone is expected to save 10 percent of residential electricityconsumption in 2020.

  14. A Study of Heavy Metal Pollution in China: Current Status, Pollution-Control Policies and Countermeasures

    Directory of Open Access Journals (Sweden)

    Hui Hu

    2014-09-01

    Full Text Available In the past 30 years, China’s economy has experienced rapid development, which led to a vast increase in energy consumption and serious environmental pollution. Among the different types of pollution, heavy metal pollution has become one of the major environmental issues in China. A number of studies show that high level of heavy metal exposure is a frequent cause of permanent intellectual and developmental disabilities. In recent years, some traditional pollutants, such as sulfur dioxide and carbon dioxide, have been put under control in China. However, heavy metal pollution, which poses even greater risks to public health and sustainable development, has yet to gain policymakers’ attention. The purpose of this paper is to explore effective countermeasures for heavy metal pollution in China. The present study reviews the current status of China’s heavy metal pollution and analyzes related public policies and countermeasures against that pollution. It also presents a few recommendations and measures for prevention of heavy metal pollution.

  15. Current status and prospects of ex situ cultivation and conservation of plants in China

    Directory of Open Access Journals (Sweden)

    Zheng Zhang

    2012-09-01

    Full Text Available This review paper summarizes the history of plant introduction and acclimatization in China, and reviews the current status and progress of plant ex situ conservation. Overall, a total of 23,340 species belonging to 3,633 genera, and 396 families are maintained in botanical gardens, whereas 412,000 accessions of 1,890 crop or crop relatives species are preserved in Chinese national crop germplasm banks and 54,000 accessions of 7,271 wild plants in Chinese germplasm bank of wild species. The paper also discussed problems and challenges in plant ex situ conservation and outlooked further development in future: (1 initiation of “Ex situ Cultivated Flora of China project”; (2 development of integrating research of ex situ and in situ plant conservation; (3 enhancing research in ex situ conservation theory and methodology for endemic plants of China; (4 facilitating restoration and recovery of rare and endangered plants into wild on basis of ex situ conservation; and (5 strengthening evaluation and utilization of economic important plants.

  16. Current Status and Perspective Development of Broomcorn Millet Production in China

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    [Objective] This paper analyzed present status of broomcorn millet produc- tion in China, including cultivation methods, fertilization utilization, diseases, insect pests and disasters, machinery development, planting benefit and other aspects. [Method] The corn millet data reported by China Industrial and Technological Re- search System of Millet in 2011 were analyzed by descriptive statistical analysis of EXCEL. [Result] The results show that 17 678.57 kg/ha of farm manure, 155.77 kg/ha of urea, 259.5 kg/ha of compound fertilizer, 203.13 kg/ha of phosphate fertilizer and 75 kg/ha of potash fertilizer were used in China; the national mechanization degree of broomcorn millet production is lower than 30% in all; the average income of broomcorn millet production is 10 503.33 yuan/ha, and the VCR is 2.64; most broomcorn millet producing areas are affected by mild pests and diseases, very few are affected by mild and moderate pests and diseases, and the impact of natural disasters is the lightest. [~onclusien] Currently fertilizer utilization for broomcorn millet is proper but the mechanization level and planting benefit are low, natural disasters, pests and diseases are not severe; finally the authors proposed some suggestions on the fertilizer utilization, mechanization production, benefit increasing, disaster warning, disease and insect controlling and government policy-making for broomcorn millet production.

  17. Modelling the transport system in China and evaluating the current strategies towards the sustainable transport development

    DEFF Research Database (Denmark)

    Liu, W.; Lund, H.; Mathiesen, B.V.

    2013-01-01

    in China. With this purpose in mind, a Chinese transport model has been created and three current transport strategies which are high speed railway (HSR), urban rail transit (URT) and electric vehicle (EV) were evaluated together with a reference transport system in 2020. As conservative results, 13...... show the potential of drawing the transport demand to the more energy efficient vehicles; however, more initiatives are needed if the sustainable transport is the long term objective, such as the solutions to stabilise the private vehicle demands, to continuously improve the vehicle efficiency...

  18. Ecotourism in nature reserves in China: current situation,problems and solutions

    Institute of Scientific and Technical Information of China (English)

    LUO Ju-chun; ZHENG Jing-ming

    2008-01-01

    Our presentation focuses on some important issues associated with ecotourism in nature reserves in mainland China. Conducting ecotourism in certain areas in nature reserves is important for its protection. However, some problems do exist because of special conditions in our society and in the current projects of nature reserves themselves, such as water and air pollution, unplanned construction of roads and facilities, damage of core zones and buffer zones, and confused ownership of nature reserves. These problems are discussed and solutions are proposed in detail, and we emphasize the participation of local communities in order to help residents fight against poverty.

  19. Current Situation,Problems and Countermeasures of World Heritage Protection in China

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    The development of World Heritage protection in China can be characterized by four facts,which are the increasing number,the domination of cultural heritages,the uneven spatial distribution,and the abundant candidate reserve for nomination.Currently,the problems of the dislocation of understanding,the absence of planning,the disorder of management,the lack of relevant institutions still exist in the field of World Heritage protection,aiming at which,the author puts forward some countermeasures,such as completing legislation system,carrying out scientific planning,implementing hierarchical and assorted administration,strengthening supervision,increasing investments,and enhancing propaganda and education.

  20. Climate policies in China, India and Brazil: current issues and future challenges

    International Nuclear Information System (INIS)

    Emerging countries will have to tackle different social and economic development challenges in the future, which translate nationally into the concepts of 'harmonious society' in China and 'inclusive growth' in India, and into the Brazilian slogan 'a wealthy country is a country without poverty'. Per capita (current US$), Brazil is more than two times richer than China, which in turn is three times richer than India. This graduation explains the variety of priorities of those countries: reducing inequalities and achieving the development processes in China and Brazil, alleviating poverty and enhancing energy access in India. Furthermore, these countries are increasingly linked internationally, along with the globalization process. Energy security is a key issue for China and India, while Brazil aims at playing a key role on future international energy markets. Emerging economies are progressively laying the foundations for low-carbon development strategies that will depend on their national contexts and priorities. Investments in building and transport infrastructures are increasingly important in all those countries, creating the conditions today for tomorrow's low-carbon economic development. China recently made important resolutions in the framework of its 12. Five-Year Plan, decoupling economic growth from GHG emissions. India has developed eight 'National Missions' on climate change and is now exploring future low-carbon strategies. And Brazil is affirming its position internationally, pushing for innovative 'green growth' concepts, within the framework of the Rio+20 Conference. All countries have already implemented several energy and climate policies and plan to develop them further, through innovative policy institutions and instruments. They are switching progressively from command- and-control to economic instruments. In particular, market-based mechanisms are increasingly used in all countries: mandatory pilot Emission Trading Systems (ETS) in China

  1. The Testability of Maximum Magnitude

    Science.gov (United States)

    Clements, R.; Schorlemmer, D.; Gonzalez, A.; Zoeller, G.; Schneider, M.

    2012-12-01

    Recent disasters caused by earthquakes of unexpectedly large magnitude (such as Tohoku) illustrate the need for reliable assessments of the seismic hazard. Estimates of the maximum possible magnitude M at a given fault or in a particular zone are essential parameters in probabilistic seismic hazard assessment (PSHA), but their accuracy remains untested. In this study, we discuss the testability of long-term and short-term M estimates and the limitations that arise from testing such rare events. Of considerable importance is whether or not those limitations imply a lack of testability of a useful maximum magnitude estimate, and whether this should have any influence on current PSHA methodology. We use a simple extreme value theory approach to derive a probability distribution for the expected maximum magnitude in a future time interval, and we perform a sensitivity analysis on this distribution to determine if there is a reasonable avenue available for testing M estimates as they are commonly reported today: devoid of an appropriate probability distribution of their own and estimated only for infinite time (or relatively large untestable periods). Our results imply that any attempt at testing such estimates is futile, and that the distribution is highly sensitive to M estimates only under certain optimal conditions that are rarely observed in practice. In the future we suggest that PSHA modelers be brutally honest about the uncertainty of M estimates, or must find a way to decrease its influence on the estimated hazard.

  2. CO2 mitigation potential in farmland of China by altering current organic matter amendment pattern

    Institute of Scientific and Technical Information of China (English)

    CADISCH; Georg

    2010-01-01

    The estimation of the global warming mitigation potential in terrestrial ecosystems is of great importance for decision makers to adopt measures to increase soil organic carbon (SOC) as well as to reduce greenhouse gas (GHGs) emissions. In this paper, we compiled data published in peer-reviewed journals, and conducted a holistic analysis of the effects of organic matter amendment on soil organic carbon sequestration, methane (CH4) and nitrous oxide (N2O) emissions in paddy and upland systems. Results showed that organic matter amendment increased soil organic carbon content, and apparent conversion rate of organic matter carbon to soil organic carbon in paddies was constant, while that in uplands decreased along with amendment years at 25 years time scale. Organic matter amendment during the rice season led to large CH4-C emissions, e.g on average 99.5 g CH4-C per kg organic carbon input under intermittent flood conditions, and 191.7 g CH4-C per kg organic carbon input under continuous flood conditions, respectively. By alteration of organic matter amendment from rice season to off-rice upland crop season, estimated CH4-C emissions in China could be cut by 3.5 Tg yr-1, accounting for 63% of current CH4-C emissions (5.5 Tg). If organic matter amendment percentage was increased from current 30% to future 50% of organic matter production and by alteration of organic matter amendment from rice season to off-rice upland crop season, the equivalent CO2-C mitigation potential in farmland of China would be 49.2 Tg yr-1 at the 10th year organic matter amendment and 36.0 Tg yr-1 at the 30th year amendment. These findings are important not only for China but also for the other rice production countries to increase farmland global warming mitigation.

  3. The Current Situation on Major Depressive Disorder in China: Research on Mechanisms and Clinical Practice.

    Science.gov (United States)

    Hou, Zhenghua; Jiang, Wenhao; Yin, Yingying; Zhang, Zhijun; Yuan, Yonggui

    2016-08-01

    Depression is the most disabling disorder worldwide that accounts for the highest proportion of global burden attributable to mental disorders. Major depressive disorder (MDD) is characterized by deep sadness, reduced energy, vegetative nervous system dysregulation, cognitive dysfunction, and even a high suicidal tendency. Although other treatment choices are available, antidepressant medication is the front-line treatment option for MDD. Regarding clinical efficacy, only ~50% of patients respond to frontline antidepressants, and <33% obtain remission. Currently, objective indexes to guide clinical decisions are still lacking. Furthermore, knowledge about the neurobiological mechanisms underlying discrepant antidepressant outcomes is still also fragmentary. In the present review, we discuss the current research progress and clinical opinions on MDD in China. PMID:27237579

  4. Effects of Tidal Currents on Nonlinear Internal Solitary Waves in the South China Sea

    Institute of Scientific and Technical Information of China (English)

    FAN Zhisong; SHI Xingang; Antony K. Liu; LIU Hailong; LI Peiliang

    2013-01-01

    The propagation and fission process of intemal solitary waves (ISWs) with amplitudes of about 170m are simulated in the northeast of the South China Sea (NSCS) by using the generalized Korteweg-de Vries (KdV) equation under continuous stratification.More attention is paid to the effects of the ebb and flood background currents on the fission process of ISWs.This kind of background current is provided by the composed results simulated in terms of monthly mean baroclinic circulation and barotropic tidal current.It is found that the obtained relation of the number of fission solitons to the water depth and stratification is roughly in accordance with the fission law derived by Djordjevic and Redekopp in 1978; however,there exists obvious difference between the effects of the ebb and flood background currents on the wave-lengths of fission solitons (defined as the distance between two neighboring peaks of ISWs).The difference in nonlinearity coefficient α between the ebb and flood background currents is a main cause for the different wave-lengths of fission solitons.

  5. Vertical Structure of Baroclinic Currents over Northern South China Sea Continental Slope

    Institute of Scientific and Technical Information of China (English)

    邱章

    2001-01-01

    The 28.6 d time series of ADCP currents at 27 depth levels, (11,15,…,115m) which are obtained from a mooring station at the northern South China Sea continental slope, have been decomposed into barotropic and baroclinic components. The emphasis in this paper is on the analysis of the time series of baroclinic currents by means of several methods,such as the tidal harmonic analysis, the power spectra and the kinetic energy estimation.The major results are as follows: (1) In respect of the baroclinic currents, the values of several parameters first decrease and then increase with depth. These parameters include the temporal mean value of the cross-shelf component, the standard deviations, the amplitudes of K1 constituents, the mean eddy kinetic energy, as well as the significant peaks of the power spectra of the cross-shelf components. (2) The diurnal period of the baroclinic currents is dominant. The diumal tidal current rotates clockwise and the major axis of current ellipse is located along the directions of NW-SE. The vertical distribution of the phases of the diurnal constituent varies with the different water layers. Around the 67m depth level, the phase changes very much.At those layers far away from the 67m depth level, the vertical distribution of the phase is relatively stable, but with opposite phases in the upper and lower water layers. For the upper layers between the surface and 67m,the phases are around 300°; for the lower layers between 67m and 115m, the phases are around 120° .(3) The mean eddy kinetic energy of the baroclinic current is quite large, accounting for 41% of the mean kinetic energy of the measured currents. The cross-shelf component is larger than the along-shelf one. The two baroclinic current components correspond to the major and minor axes of the current ellipse of the diurnal constituent respectively. (4) The power spectra of the baroclinic currents show a singnificant period of about 24h, with 23.6h at both 19m and 99m and 24

  6. Current State and Prospect of China's Refining Sector%Current State and Prospect of China's Refining Sector

    Institute of Scientific and Technical Information of China (English)

    Zhu He

    2012-01-01

    (1) China's refining capacity will reach 650 million tons per year, the cooperation with oil producing countries in refining sector will be strengthened and a diversified competitive framework for the sector will be further pushed forward.

  7. Soil organic carbon of an intensively reclaimed region in China: Current status and carbon sequestration potential.

    Science.gov (United States)

    Deng, Xunfei; Zhan, Yu; Wang, Fei; Ma, Wanzhu; Ren, Zhouqiao; Chen, Xiaojia; Qin, Fangjin; Long, Wenli; Zhu, Zhenling; Lv, Xiaonan

    2016-09-15

    Land reclamation has been highly intensive in China, resulting in a large amount of soil organic carbon (SOC) loss to the atmosphere. Evaluating the factors which drive SOC dynamics and carbon sequestration potential in reclaimed land is critical for improving soil fertility and mitigating global warming. This study aims to determine the current status and factors important to the SOC density in a typical reclaimed land located in Eastern China, where land reclamation has been undergoing for centuries. A total of 4746 topsoil samples were collected from 2007 to 2010. The SOC density of the reclaimed land (3.18±0.05kgCm(-2); mean±standard error) is significantly lower than that of the adjacent non-reclaimed land (5.71±0.04kgCm(-2)) (pdensity and the environmental/anthropogenic factors (R(2)=0.59). The soil pH, land use, and elevation are the most important factors for determining SOC dynamics. In contrast, the effect of the reclamation age on the SOC density is negligible, where SOC content in the land reclaimed during years 1047-1724 is as low as that reclaimed during years 1945-2004. The scenario analysis results indicate that the carbon sequestration potential of the reclaimed lands may achieve a maximum of 5.80±1.81kgCO2m(-2) (mean±SD) when dryland is converted to flooded land with vegetable-rice cropping system and soil pH of ~5.9. Note that in some scenarios the methane emission substantially offsets the carbon sequestration potential, especially for continuous rice cropping system. With the optimal setting for carbon sequestration, it is estimated that the dryland reclaimed in the last 50years in China is able to sequester 0.12milliontons CO2 equivalent per year. PMID:27196991

  8. Extension of a double-wedged orogen potentially leads to the current South China Sea

    Science.gov (United States)

    Wu, G.; Lavier, L. L.

    2015-12-01

    The South China Sea (SCS) is surrounded by South China on the NW, Palawan and Reed Bank on the SE, as well as several microplates, resembling a jigsaw puzzle. In an attempt to better understand its evolution, we designed simplified thermomechanical models to simulate extension of a double-wedge-shaped orogen with highlands on both sides and lowland in the center to mimic the geological condition of the proto-SCS. We imposed constant extension rates on both sides and Gaussian-shaped thermal impulse in the center. We also varied the strength of lower crust but did not explicitly incorporate mid-ocean ridges and searfloor spreading mechanisms. We currently used symmetric double-wedge, but further tests are planed for asymmetric double-wedges. Our preliminary results show that the models produced many structures that resemble those of SCS, such as 1) a series of domino or conjugate faults sitting above a subsurface detachment (or décollement), 2) exhumed domes of middle-lower crust, 3) extreme thinning of both upper crust and lower crust, and 4) propagation of extension towards NW and SE margins. Our models suggest that superimposition of these modeled characteristics produced during several phases of extension of the SCS that may be due to thermal impulsion, magmatic events, and subduction related relaxation potentially produces high resemblance of the SCS.

  9. The current economic situation in China and its impact on the Czech Republic

    Directory of Open Access Journals (Sweden)

    Hana Stverkova

    2016-03-01

    Full Text Available Nowadays, many companies try to enter to the international sector and to extend here their activity. Their international cooperation is an integral part of the action; it is necessary to know the cultural differences. Therefore it is important to understand the social development including the Social Progress Index and the secondary analysis of an economic situation in China; and its subsequent impact on the economy not only in the Czech Republic based on evaluation of Czech-Chinese business relations. China was in the last five years the male rotor of the world economic growth and became a significant importer of commodities. Last year, the Chinese economic growth rate slowed down, which could have negative consequences on other economies. This is also the possible reason for some Czech companies leaving the Chinese market; they transfer their production parts back to Europe or India. A presumption of high living standard, which all countries of the world and their inhabitants want to achieve, is according to the current paradigm of economic science the economic growth. The economy does not take pace in a vertical line, but at the horizontal level as the meaning of sharing in the net among the individuals. And the cooperation does not take place in the horizontal line but in the vertical line, which essentially changes the way of people's working.

  10. The Current Status of Usability Studies of Information Technologies in China: A Systematic Study

    Directory of Open Access Journals (Sweden)

    Jianbo Lei

    2014-01-01

    Full Text Available Objectives. To systematically review and analyze the current status and characteristics of usability studies in China in the field of information technology in general and in the field of healthcare in particular. Methods. We performed a quantitative literature analysis in three major Chinese academic databases and one English language database using Chinese search terms equivalent to the concept of usability. Results. Six hundred forty-seven publications were selected for analysis. We found that in China the literature on usability in the field of information technology began in 1994 and increased thereafter. The usability definitions from ISO 9241-11:1998 and Nielsen (1993 have been widely recognized and cited. Authors who have published several publications are rare. Fourteen journals have a publishing rate over 1%. Only nine publications about HIT were identified. Discussions. China’s usability research started relatively late. There is a lack of organized research teams and dedicated usability journals. High-impact theoretical studies are scarce. On the application side, no original and systematic research frameworks have been developed. The understanding and definition of usability is not well synchronized with international norms. Besides, usability research in HIT is rare. Conclusions. More human and material resources need to be invested in China’s usability research, particularly in HIT.

  11. Current attitudes toward organ donation after cardiac death in northwest China

    Institute of Scientific and Technical Information of China (English)

    Pan Xiaoming; Liu Linjuan; Xiang Heli; Ding Chenguang; Ren Li; Xue Wujun

    2014-01-01

    Background People's attitude toward organ donation after cardiac death (DCD) has not come to an agreement in different countries and regions.Influenced by the local culture in China for thousands of years,the general public has different ideas about this issue.The purpose of this study was to investigate the current attitudes trend and characteristics of transplantation with organs donated after cardiac death in northwest China.Methods This largest single-center cohort study was performed by an interview or by telephone using a questionnaire.The family members of potential DCD donors were recruited from the First Affiliated Hospital,medical college of Xi'an Jiaotong University located in a metropolitan area of northwest China.The 12-item attitude questionnaire was specifically developed from the literature review with coordinator,physician,and donor's family feedback.The participants were asked to rate the queries on a 5-point Likert intensity scale.Results The 174 participants included 56 (32.2%) women and 118 (67.8%) men.Most people were aged between 41 and 50 years (n=63,36.2%),31 and 40 years (n=59,33.9%),and less than 30 years (n=36,20.7%).The top five attitudes of participants were the best person to suggest organ donation to a family was ranked as the DCD coordinator of Red Cross Organization (RCO,n=160,92%),donor is a hero (n=143,82.2%),honor to be a donor's family member (n=136,78.2%),improved relationship with colleagues (n=124,71.3%),and with recipient after donation (n=123,70.7%).The best person to suggest organ donation to a family was ranked as the coordinator of RCO (n=160,92%),doctor unrelated to transplantation (n=104,59.8%),social worker (n=36,20.7%),and doctor related to transplantation (n=25,14.4%).The top two reasons for non-consent to donation were that the family insisted on intact body after patient death and did not want to have surgery again (n=51,41.5%),and feared that they would be misunderstood by neighbors

  12. NUMERICAL STUDY ON THE FORMATION OF THE SOUTH CHINA SEA WARM CURRENT Ⅱ. BAROCLINIC CASE

    Institute of Scientific and Technical Information of China (English)

    王凯; 方国洪; 施心慧

    2001-01-01

    In this part, Levitus' climatological temperature and salinity are incorporated in the numerical model developed in Part I. Diagnostic and prognostic experiment on the thermohaline circulation were conducted. The smooth Levitus' data do not include any information on the South China Sea Warm Current (SCSWC), so it is not in the model-produced diagnostic thermohaline circulation. Although the SCSWC does not appear in the wind-driven circulation in the barotropic case, it appears in the prognostic wind-driven circulation in the baroclinic case. This implies that the differing circulation pat-terns between barotropic case and bareclinic case are due to the stratification. The prognostic thermohaline circulation with wind stress and inflow/outflow transports at open boundaries are also discussed. Coupling of density and dynamic forces makes the circulation pattern more complicated, Even though the stratification is not always a direct cause of the formation of the SCSWC, it is at least an indirect cause.

  13. NUMERICAL STUDY ON THE FORMATION OF THE SOUTH CHINA SEA WARM CURRENT II. BAROCLINIC CASE

    Institute of Scientific and Technical Information of China (English)

    王凯; 方国洪; 施心慧

    2001-01-01

    In this part, Levitus' climatological temperature and salinity are incorporated in the numerical model developed in Part I. Diagnostic and prognostic experiment on the thermohaline circulation were conducted. The smooth Levitus' data do not include any information on the South China Sea Warm Current (SCSWC), so it is not in the model-produced diagnostic thermohaline circulation. Although the SCSWC does not appear in the wind-driven circulation in the barotropic case, it appears in the prognostic wind-driven circulation in the baroclinic case. This implies that the differing circulation patterns between barotropic case and baroclinic case are due to the stratification. The prognostic thermohaline circulation with wind stress and inflow/outflow transports at open boundaries are also discussed. Coupling of density and dynamic forces makes the circulation pattern more complicated. Even though the stratification is not always a direct cause of the formation of the SCSWC, it is at least an indirect cause.``

  14. The current status, threats and protection way of Sanjiang Plain wetland, Northeast China

    Institute of Scientific and Technical Information of China (English)

    ZHOUZhi-qiang; LIUTong

    2005-01-01

    The Sanjiang Plain is a vast area of alluvial floodplains and low hills in northeast Heilongjiang Province. It is the largest tract of wetlands in China and East Asia outside of Siberia. 28 wetland nature reserves exist on the Sanjiang Plain, and three of them have been listed as wetlands of international importance to water bird conservation by the Ramsar Convention Bureau. The wetlands of Sanjiang Plain are noteworthy for its rich biodiversity, but they continue to decline in area and deteriorate in quality currently. The main threats or constrains, immediate cause, root cause and required response are analyzed in this paper, and the four aspects opinion such as improvement of watershed management, enhancement of protection and restoration of habitats and biodiversity, alternative livelihoods of rural residents living in and near natural wetland reserve, and reinforcement of capacity building of natural reserves are brought forward as the effective measures for the Sanjiang Plain wetland protection.

  15. Current status of PTA industry in China%我国PTA产业现状

    Institute of Scientific and Technical Information of China (English)

    黄攀

    2014-01-01

    The article reviews Current production status、new expansion projects、the balance of supply and de-mand 、Situation on the upstream and downstream as well as related forecasts of PTA industry in China,In view of the characteristics of PTA industry and major issues faced by PTA industry in the future in our country,Some sug-gestions for developing PTA industry are put forward.%着重论述了我国精对苯二甲酸(PTA)产业生产现状、新扩建项目情况、供需平衡、上下游情况及相关预测等,并针对 PTA行业的特点和未来我国 PTA行业面临的主要问题,提出了几点发展建议。

  16. A Review on Some Applications of Magnesia in Current China Refractories Industry

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Magnesia-based refractories hold a big share in the total refractories output in China because of abundance of magnesite resource. In this paper a short review has been focused on the current and future new use of magnesia in the production of magnesia-based products including low carbon MgO-C bricks, MgOCaO bricks, MgO-based castables, MgO-CaO-Fe2O3ramming mix and MgO-CaO-C bricks for low carbon steelmaking and clean steel making, magnesite ball for slag splashing, MgO-CaO-ZrO2 for sintering and transfering zones of cement kiln and MgAlON for special use in the steel industry.

  17. Errors of Mean Dynamic Topography and Geostrophic Current Estimates in China's Marginal Seas from GOCE and Satellite Altimetry

    DEFF Research Database (Denmark)

    Jin, Shuanggen; Feng, Guiping; Andersen, Ole Baltazar

    2014-01-01

    The Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) and satellite altimetry can provide very detailed and accurate estimates of the mean dynamic topography (MDT) and geostrophic currents in China's marginal seas, such as, the newest high-resolution GOCE gravity field model GO...... and geostrophic current estimates from satellite gravimetry and altimetry are investigated and evaluated in China's marginal seas. The cumulative error in MDT from GOCE is reduced from 22.75 to 9.89 cm when compared to the Gravity Recovery and Climate Experiment (GRACE) gravity field model ITG...

  18. Modeling assessment of tidal current energy in the Qiongzhou Strait, China

    Institute of Scientific and Technical Information of China (English)

    WU He; YU Huaming; DING Jie; YUAN Dekui

    2016-01-01

    In the present study, an existing three-dimensional finite volume computational ocean model (FVCOM) was refined and configured including an algorithm for computing the power density and mean power density at Qiongzhou Strait of China. The refined model was validated with the measured tidal levels and tidal currents at different gauging stations. The model results are in reasonable agreement with the measured data. Based on the modeling results, we assess the resource of the tidal stream energy in the Qiongzhou Strait and discuss the temporal and the spatial distribution of the tidal current energy there. The conclusion is extracted: the higher power density occurs in the middle area of the strait, and lower at both sides. Characteristics of power density such as the maximum possibility speed, maximum power density during the spring tide period and the neap tide period, have the similar distribution. The southeast part and central area of the strait are of rich tidal current energy, where the maximum possibility speed can reach to 4.6 m/s, and the maximum power density of the spring tide period and the neap tide period can reach 5 996 and 467 W/m2 separately in the surface layer The annual mean power density can reach 819 W/m2. Statistical length of accumulative time of the velocity exceeding 0.7 m/s is about 4 717 h at local point during a year. The total theoretical tidal current energy resource is approximately 189.55 MW and the available exploited energy on present technology condition is 249, 20.2 and 263 GW/a separately by using the methods FLUX, FARM and GC in the Qiongzhou Strait.

  19. Features and variability of the South China Sea western boundary current from 1992 to 2011

    Science.gov (United States)

    Quan, Qi; Xue, Huijie; Qin, Huiling; Zeng, Xuezhi; Peng, Shiqiu

    2016-07-01

    Different from the traditional definition of the South China Sea western boundary current (SCSWBC), in this paper, only the southwestward and southward currents along the northern and western slopes in the SCS, which are closely associated with the basin-wide wind stress curl, are defined as the SCSWBC, while the flows on the southwestern shelf driven directly by the local wind stress are regarded as part of the shelf circulation. Using a new reanalysis dataset of the SCS in conjunction with the in situ and remote sensing data, the main features and variability of the SCSWBC from 1992 to 2011 were studied. Dictated by the prevailing monsoonal winds and in- and outflows, the SCSWBC in winter extended the full length of the western slope and reached its maximum intensity off the southeast coast of Vietnam, while in summer the main body of the SCSWBC was limited to the northern half of the western slope and merged with the northward coastal current to form the Vietnam Offshore Current (VOC) at about 12° N. Moreover, the respective seasonal patterns of the SCSWBC showed pronounced interannual variations in its structure, including the axis, the width, and the maximum depth. The strength of the SCSWBC, with the transport of -11.8 ± 3.5 Sv in winter and -3.0 ± 1.6 Sv in summer off the central coast of Vietnam, also varied significantly from year to year. It was demonstrated that the monsoonal forcing over the SCS, the interannual variability of which was closely associated with El Niño events, played an important role in modulating the interannual variability of the SCSWBC, whereas the influence from the upper-layer Luzon Strait transport was secondary.

  20. Current Status of Treatment for Systemic Lupus Erythematosus in China and Its Prospect

    Institute of Scientific and Technical Information of China (English)

    杨虎天; 魏强华

    2002-01-01

    @@ CURRENT OVERALL LEVEL IN CHINA OF SLE TREATMENTSystemic lupus erythematosus (SLE) is a kind of most complicated auto-immune disease and its etiology is still not clear so far. There are at least one million patients in China. SLE was taken as an “inc urable disease” in the fifties, but recently th e understanding of SLE got gradually elevated, and the efficacy of treatment won further progresses, therefore prognosis was obviously improved. According to the re sult of an 18-year follow-up of 50 SLE patients treated by Shanghai Renji Hospital in 1999, their 5-, 10-, 15- and 18-year survival rate reached 98%, 84%, 76% and 70% respectively, and the international progressive level has been reach ed (1) , it was also discovered that 13 cases (26%) has stopped medication for 12 years (2-17 years) and did not have manifestation of SLE activation. SLE usually occurred in child-bearing women, hence pregnancy complicated with SLE was also a problem fr e quently encountered. The most frequent thought then was to take measures to stop pregnancy to save the life of the women, while at present, if a woman took small dosage of prednisone without the activation of SLE over 12 months, pregnancy can be considered; for those already pregnant women, dosage of pre dnisone could be inc reased under the guidance of rheumatologic and gynecologic specialists; during labor corticosterone (CS) intravenous dripping and other measures were added. Eighty-one new born babies by 80 cases of pregnancy complicated with SLE, have been delivered with both mot her and baby surviving: an inspiring good outcome (2) .

  1. Modelling the transport system in China and evaluating the current strategies towards the sustainable transport development

    International Nuclear Information System (INIS)

    Transport is one of the most challenge sectors when addressing energy security and climate change due to its high reliance on oil products and lack of the alternative fuels. This paper explores the ability of three transport strategies to contribute to the development of a sustainable transport in China. With this purpose in mind, a Chinese transport model has been created and three current transport strategies which are high speed railway (HSR), urban rail transit (URT) and electric vehicle (EV) were evaluated together with a reference transport system in 2020. As conservative results, 13% of the energy saving and 12% of the CO2 emission reduction can be attained by accomplishing three strategies compared with the reference transport system. However, the energy demand of transport in 2020 with the implementation of three strategies will be about 1.7 times as much as today. The three strategies show the potential of drawing the transport demand to the more energy efficient vehicles; however, more initiatives are needed if the sustainable transport is the long term objective, such as the solutions to stabilise the private vehicle demands, to continuously improve the vehicle efficiency and to boost the alternative fuels produced from the renewable energy sources. - Highlights: • A Chinese transport model was created and three transport strategies were evaluated • Transport is the biggest driver of the oil demand in China not the industry • The energy demand of transport in 2020 will be twice as much as today • Strategies contribute 13% energy saving and 12% CO2 emission reduction • More initiatives are needed if a sustainable transport is the long-term objective

  2. Characteristics of return stroke currents of classical and altitude triggered lightning in GCOELD in China

    Science.gov (United States)

    Zheng, Dong; Zhang, Yijun; Lu, Weitao; Zhang, Yang; Dong, Wansheng; Chen, Shaodong; Dan, Jianru

    2013-07-01

    The currents of 29 return strokes (RSs) involved in 10 classical triggered lightning flashes (TLFs) and an altitude TLF conducted in Guangdong, China from 2008 to 2011 are analyzed for the first time. They have relatively greater peak values (geometric mean (GM) of 16.07 kA), average rate of rise between 10 and 90% (S10-90%, GM of 29.16 kA μs- 1), charge transfer within 1 ms (Q1 ms, GM of 1.36 C) and action integral within 1 ms (AI1 ms, GM of 5.39 × 103 A2 s), compared with those reported in other studies. The current peak value exhibits pronounced exponential relation with S10-90% (determination coefficient (R2) = 0.43) and maximum rate of rise (R2 = 0.77), power relation with Q1 ms (R2 = 0.89), and logarithmic relation with AI1 ms (R2 = 0.93). Additionally, the discharges associated with the processes of initial-stage return strokes (ISRSs) involved in two altitude TLFs, with the peak currents of 10.09 kA and 9.03 kA, respectively, are investigated. Their peak, 10-90% risetime, average rate of rise between 10 and 90% and maximum rate of rise are comparable to those of the RSs. The chopped-shape pulses closely following the ISRSs and the pulses associated with the disintegration and reconnections of the wire's channel are also discussed.

  3. GRAIN SIZE DISTRIBUTION OF SEDIMENT IN THE NORTHERN EAST CHINA SEA AND THE RELATIONSHIP WITH THE SEA CURRENTS

    Institute of Scientific and Technical Information of China (English)

    LEI Kun; YANG Zuosheng; GUO Zhigang

    2002-01-01

    This paper discusses the relationship between the grain size distribution of sediment and currents in the northern East China Sea on the basis of the grain size analysis. The results show that grain size distribution of suspended sediment is controlled by the currents. Suspended sediment in the littoral water is finer than those in the open sea currents. Grain size distribution of surface sediment is affected by the sea currents to some extent. And the grain size of suspended sediment and surface sediment do not agree with each other in positions.

  4. Analysis of fractal magnitude of soil particles in loamy Chao soils in North China Plain%华北冲积平原壤质潮土的土壤粒径分形空间尺度分析

    Institute of Scientific and Technical Information of China (English)

    李晓鹏; 刘建立; 张佳宝; 王伟鹏; 辛文文

    2014-01-01

    It is widely accepted that soils have fractal characteristics in certain spatial scales. However, the exact magnitude of this spatial self-similarity is often neglected when doing fractal related researches. In this study, 43 sets of soil particle size distribution data of the Chao soil in North China Alluvial Plain were collected, and their particle size distributions with 93 levels were determined by laser diffraction analysis method (Beckman Coulter LS 13-320).The spatial magnitude orders of soils can be taken as fractal objectives and their affecting factors were analyzed based on the particle size distribution data. For determining the fractal magnitude of the soils, we used a typical scale method:1) calculate the differential fractal dimensions in all the 93 particle size levels (Di, i=1, 2,…, 93) according to the definition fractal; 2) choose a typical scale which is supposed to follow self-similarity (however, the measured Di values may still fluctuate in a certain range); 3) suppose Di in the typical scale is normally distributed, and calculate the corresponding distribution characteristics; 4) use the distribution characteristics to find out the lower and upper limits of Di which follows the same normal distribution in the whole range from the lower to upper limit (in the study, 0.5%and 99.5%of the accumulation curve were taken as the lower and upper limits, respectively);5) fit Di in the entire fractal magnitude, and the slope is supposed to be the fractal dimension of the soil.The results showed that the Chao soils in the study area mostly had good gradations, and they only had rigorous fractal structure at small to medium particle sizes (large clay to fine silt), but didn’t show spatial self-similarity in coarse sand scale. Soils with more clay particles usually had larger fractal dimensions, and the extents of fractal reduced with the increasing of clay fraction. Soils with good graduations usually had wider fractal extents. The fractal dimension

  5. Graduate education of library science in China:Current status and recommendations for improvement

    Institute of Scientific and Technical Information of China (English)

    KE; Ping; WANG; Ping; TANG; Chengxiu

    2008-01-01

    More than twenty years ago,Wuhan University and Nanjing University offered library science(LS)graduate programs.Since then,LS graduate education has been growing quickly in many aspects.At the same time,however,LS graduate education was also facing enormous challenges stemming from the dynamic development and wide applications of information technologies into the pedagogical arena of teaching and learning at all levels.Social evolution also made it necessary for LS educators to re-examine once again their graduate education model,curricular composition,educational philosophy and educational missions.In analyzing the present situation of LS graduate education in China,this paper focuses on the following issues:1)Growing size of LS graduate education(quantity and quality);2)educational objectives,including research direction and placement for graduates;3)structure of knowledge and curricular construction;4)conditions of administering a library school of high quality and 5)the management of teaching resources.The keystone of this paper is to pinpoint where current library science curricular deficiencies are lying.It is hoped that more serious scholarly discussions and perhaps also even concerted efforts among LS scholars and library practioners may be evoked in having the graduate education system of library and information science thoroughly realigned for the informational needs of the 21stcentury.

  6. Environmental externality and inequality in China: current status and future choices.

    Science.gov (United States)

    Zhao, Xiaoli; Zhang, Sufang; Fan, Chunyang

    2014-07-01

    Along with China's rapid economic growth, the environmental externality in the country is getting more and more serious. China's environmental externality is accompanied by environmental inequality, which presents two characteristics: First, the health loss caused by environmental externality is concentrated in the elderly and children. We take Beijing as an empirical analysis to conclude that children (0-4 years old) are the largest group suffered from respiratory disease; while the seniors are the largest group suffered from cardiovascular disease. Second, China's environmental inequality is mainly caused by the transfer of industries from urban to rural areas/suburbs. The villagers in poor rural areas are the biggest victims. China's environmental inequality is reflected particularly by the phenomenon of "cancer villages" which has existed ever since the end of 1970s. Finally, policy recommendations are provided for reducing China's environmental externality and inequality.

  7. The Current Situation and Trend in South China Sea%当前南海形势及走向

    Institute of Scientific and Technical Information of China (English)

    吴士存

    2015-01-01

    南海问题的实质是南沙岛礁主权和海域管辖权争议,涉及“五国六方”。近年来,受美国全球战略调整等多重因素的影响,南海问题持续升温,有关争端国不断加大权益声索和实际管控力度,地区局势愈演愈烈。南海是我国国防安全海上屏障、发展制海权的重要战略出海口、经济和能源安全的海上运输要道及未来的能源和资源基地。新阶段,南海局势将继续保持升温态势,因此我国需要从国家总体发展战略全局出发,把握并延长战略机遇期,通盘考虑国际和国内影响因素,长远谋划妥善处理南海问题战略和战术决策,有效化解面临的巨大挑战,确保整体利益最大化。%The essence of the South China Sea issue is the dispute among five states and Chinese Taiwan over the sovereignty of Nansha Islands and jurisdiction of maritime zones in the South China Sea. In recent years,relevant disputants have been intensifying the attempts to bolster their claims and actual control. Regional situation has been moving towards greater tensions. The South China Sea acts as a maritime shield for China to strengthen na_tional defense,an important sea outlet for China to gain sea power,significant sea lanes for China to safeguard e_conomic and energy security,and a base for China to secure energy and other resources in the future. Therefore, it is imperative for China to maintain the maritime rights. In a new historical period when the South China Sea situation continue to intensify,we should approach the South China Sea issue from the standpoint of overall na_tional development strategy,seek important opportunities for strategic development,take international and domes_tic factors into account,develop long_term strategic and tactical countermeasures to alleviate the current situa_tion and maximize China′s interests.

  8. The development and current status of the technology of isotope and radiation in China

    Energy Technology Data Exchange (ETDEWEB)

    Luo Zhifu [Dept. of Isotope, China Inst. of Atomic Energy, Beijing, BJ (China)

    1998-10-01

    The research and application of the technology of isotopes and radiation have been reviewed. Since the setup of the China`s first nuclear reactor at China Institute of Nuclear Energy in 1958, the technology of isotopes and radiation has been developed significantly. A research and application system has formed a considerable state. The technology of isotopes and radiation has been taken into the fields of industry, agriculture, medicine, and scientific research. The main achievements are on radiopharmaceuticals, radiation source, radiation process, and radioactive tracers. (author)

  9. Current situation and outlook of China rare earth industry (continued)%Current situation and outlook of China rare earth industry (continued)

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    China exported totally 16,900 tons of rare earths (physical quantity) during 2011, equivalent to 15,700 tons of rare earth oxide. Export value was USD 2.667 billion, with average unit export price of USD 169.9 per kilo. Price changes of rare earth products since January 2011 are reflected in Figure 2, 3 and 4, which show that the price rose rapidly since February, increased markedly after May, peaked in July and started to decline since then. There was not much change to the price of La and Ce products, but the price of didymium and Eu, Tb and Dy products that are in large demand changed significantly. Price in August of 2012 was about 30-40% of the highest price in 2011. Considering large increase of resource cost and environment cost, the price had been in a rational range.

  10. Current State of Clinical Studies on Diagnosis and Treatment of Sudden Deafness in China

    Institute of Scientific and Technical Information of China (English)

    YU Yaping; YANG Shiming; GUO Wei; YANG Weiyan; GU Rui

    2006-01-01

    Objective To evaluate the current status of clinical studies on diagnosis and treatment of sudden deafness (SD) in China by retrospective reviewing articles on SD published in Chinese journals in the past 5 years.Special attention is given to whether the diagnosis and treatment standards established in 1996 by the otolaryngology branch of Chinese Medical Association (the"1996 standard") were followed. Methods The terms of "Sudden deafness" and "treatment" were used as the keywords in searching articles published between 2000 and 2004 in the Chinese biomedicine literature database and Chinese journal network. Principles of evidence-based medicine were applied in reviewing the articles. Results Two hundreds and thirty- four articles were identified, including 176 between 2000 and 2002 and 58 between 2003 and 2004. Among the 176 articles published between 2000 and 2002,effects of medications were studies in 126 articles, of which only 26 (20.6%) followed the"1996 standards".Eighty-nine (70.6%) were reported based on controlled clinical trials (CCT) and 36 (28.5%) met the criteria of randomized controlled trails (RCT). Of the 58 articles published between 2003 and 2004, drug effects were evaluated in 25 articles, which were all based on the "1996 standards". However, there lacked placebo control, follow-up data or statistical analysis in these papers. Only 6 articles reported side-effects from pharmacological treatment. Conclusions While a significant number of articles on SD were published in the past 5 years, the "1996 standards" were followed only in a small number of them. The standards may not be appropriate in guiding research and need to be modified for improved guidance to SD management. Multi-center, RCTs should be a crucial part in studies on SD.

  11. History and Current Status of Development and Use of Viral Insecticides in China

    Directory of Open Access Journals (Sweden)

    Xiulian Sun

    2015-01-01

    Full Text Available The use of insect viruses as biological control agents started in the early 1960s in China. To date, more than 32 viruses have been used to control insect pests in agriculture, forestry, pastures, and domestic gardens in China. In 2014, 57 products from 11 viruses were authorized as commercial viral insecticides by the Ministry of Agriculture of China. Approximately 1600 tons of viral insecticidal formulations have been produced annually in recent years, accounting for about 0.2% of the total insecticide output of China. The development and use of Helicoverpa armigera nucleopolyhedrovirus, Mamestra brassicae nucleopolyhedrovirus, Spodoptera litura nucleopolyhedrovirus, and Periplaneta fuliginosa densovirus are discussed as case studies. Additionally, some baculoviruses have been genetically modified to improve their killing rate, infectivity, and ultraviolet resistance. In this context, the biosafety assessment of a genetically modified Helicoverpa armigera nucleopolyhedrovirus is discussed.

  12. Current Status, Challenges, and Future Sustainable Development Strategies for China Energy

    Institute of Scientific and Technical Information of China (English)

    陈文颖; 吴宗鑫

    2004-01-01

    China's rapid economic growth,high-energy-intensitive industrial and product structure,coal- dominated energy structure,and low-energy efficiency result in China being the second largest energy consumer as well as the second largest CO2 emission country in the world.The Markal model,an integrated energy,environment,and economic model,was used to analyze China's energy development scenarios from 1995 through 2050 for policy study of long-term energy strategies.The results show that diversified,reliable,and environmentally sound energy development strategies should be adopted for China to solve the challenges of the increasing energy demand,the enlarging gap between the oil demand and supply,and growing concerns over local as well as global environmental issues.Coal-derived synthetic transportation fuels through coal liquefaction,hydrogen making,and advanced coal-based poly-generation technologies should be developed to solve energy security issues.

  13. Forest management policies and resource balance in China: an assessment of the current situation

    OpenAIRE

    Démurger, Sylvie; Yuanzhao, Hou; Weiyong, Yang

    2007-01-01

    Working paper du GATE 2007-12 Using the latest forest inventory, this paper provides a comprehensive analysis of China's forest sector by focusing on new forest trends, forest policy changes and challenges to achieve a sustainable forest management. We analyze the dynamics of forest resources and provide an impact assessment of forest policies on China's forestry development over the last decades. Moreover, the analysis of the forest market highlights substantial disequilibria marked by a ...

  14. Current status, crisis and conservation of coral reef ecosystems in China

    OpenAIRE

    ShaoHong Wu; WenJun Zhang

    2012-01-01

    Harboring rich marine species and playing important ecological functions, coral reef ecosystems have attracted widespread concern around the world. Ecosystem diversity, conservation and management of coral reefs are becoming a hot research area. Coral reefs in China are mainly distributed in the South China Sea and Hainan, Taiwan, Hong Kong, Guangdong, and Guangxi coastal waters. In recent years, due to the global climate change and the growing impact of human activities, coral reef biodivers...

  15. The Problems of Current Tourism and Hospitality Higher Education for Undergraduates in China

    OpenAIRE

    Zheng, Youli

    2008-01-01

    The tourism industry has boomed within the last three decades. With the rapid development of the tourism industry in China, tourism and hospitality education, especially higher education, has also flourished in China. In 1978, not a single program was offered in tourism and hospitality education at any of the universities and colleges. However, in 2005 there were 693 universities and colleges offering tourism and hospitality programs and this number is still rapidly increasing. This dissertat...

  16. The current status of self-management of type 2 diabetic people in Beijing, China

    OpenAIRE

    2002-01-01

    Introduction: In the Chinese community, rapid urbanization, sedentary life style, stress, smoking and changes in dietary may increase the risk of type 2 diabetes. Studies conducted in China showed an increasing prevalence rate from 1.1%in 1980 to 4.56% in 1996. However, no studies carried on self-management implementation is available in China now. Objectives: To describe the status of self-management implementation among diabetic people in Beijing and to identify possible factors in...

  17. Recent advance and current status of management of head trauma in China

    Institute of Scientific and Technical Information of China (English)

    JIANG Ji-yao

    2008-01-01

    @@ It is estimated that more than 1 million Chinese people sustain traumatic brain injury (TBI) annually, nearly 10% of whom are dead and 30% are complicated with physical, cognitive, behavioral and/or psychosocial impairments in China. A lot of experimental researches and clinical trials of head trauma have been made in China recently, which improves the understanding of pathological mechanisms and prognosis of severe traumatic brain injury.

  18. 我国乳品标准体系现状%Current Status of China s Dairy Product Standards System

    Institute of Scientific and Technical Information of China (English)

    幸汐媛; 李江华

    2011-01-01

    近年来乳品安全事件频繁发生,本文通过介绍我国乳品标准体系的发展和乳品标准体系的特点,对我国现行的在奶畜养殖环节、生产加工环节和流通环节的乳品国家标准、行业标准进行相关阐述,分析我国乳品标准体系的现状。%Dairy safety incidents occur frequently in recent years.This article introduces the development and features of China s dairy product standards system,and summarizes and analyzes the current national and industrial standards for dairy products concerning cow breeding,production,processing,and circulation.Meanwhile,a review of the current status of China s dairy product standards system is provided.

  19. Advancing Implementation of Evidence-Based Public Health in China: An Assessment of the Current Situation and Suggestions for Developing Regions

    OpenAIRE

    Jianwei SHI; Jiang, Chenghua; Tan, Duxun; Yu, Dehua; Lu, Yuan; Sun, Pengfei; Pan, Ying; Zhang, Hanzhi; Wang, Zhaoxin; Yang, Beilei

    2016-01-01

    Objective. Existing research shows a serious scarcity of EBPH practice in China and other developing regions; as an exploratory study, this study aimed to assess the current EBPH implementation status in Shanghai of China qualitatively. Methods. Using semistructured key informant interviews, we examined the status of and impediments to the lagging EBPH in China. Data were analyzed based on the Consolidated Framework for Implementation Research (CFIR). Results. Chinese public health practition...

  20. Study on the Current Situation and Source Apportionment of PM2.5Pollution in China

    Institute of Scientific and Technical Information of China (English)

    Nianliang; CHENG; Shangyin; GAO; Yunting; LI; Bingfen; CHENG; Kuikui; YUAN

    2015-01-01

    In this paper,using concentration data of PM2. 5in 2013 in China and referring to a lot of literature,we preliminary studied the pollution of fine particulate matter and summarized PM2. 5source apportionment in the key cities in China. Our results showed that PM2. 5showed significant spatial and temporal distribution; high surface concentrations of PM2. 5concentrated mainly in the North China Plain,the Sichuan Basin,Yangtze River Delta and other regions; the average annual concentration of PM2. 5was about 80μg / m3 in North China Plain; Seasonal changes in the concentration of PM2. 5was winter > spring > autumn > summer; fired sources,industrial sources,vehicle exhaust were the major sources of PM2. 5; motor vehicle exhaust mostly contributed 10%- 30% to PM2. 5. This review provides a fundamental understanding of PM2. 5source apportionment and serves as an important reference for future source apportionment studies to be widely conducted in China.

  1. Diagnostic imaging in AIDS in China:current status and clinical application

    Institute of Scientific and Technical Information of China (English)

    LI Hong-jun

    2011-01-01

    @@ AIDS has been a serious problem threatening the health of people all over the world.In China,AIDS,as the new plague in the 21th century,has been listed as one of the major communicable diseases.Despite its low prevalence in China,AIDS has a high prevalence in certain populations and in local areas.China's AIDS plague was jointly accessed by the Ministry of Health of China,United Nations Programme on HIV and AIDS (UNAIDS) and World Health Organization (WHO),which indicated that by the end of 2007 there were about 0.7 million (0.55 to 0.85 million) people infected with HIV in China,with an infection rate of 0.05%.1 Great efforts have been continuously made to control the HIV infected cases to be within 1.5 million by the year of 2010.2 The severe challenge of preventing and treating AIDS has attracted extensive attention from both the government and the public and it has reached a top priority.

  2. Mapping surface tidal currents and Changjiang plume in the East China Sea from Geostationary Ocean Color Imager

    Science.gov (United States)

    Hu, Zifeng; Wang, Dong-Ping; Pan, Delu; He, Xianqiang; Miyazawa, Yasumasa; Bai, Yan; Wang, Difeng; Gong, Fang

    2016-03-01

    The spatial pattern of the semidiurnal M2 tidal currents in the East China Sea (ECS) is mapped from the Geostationary Ocean Color Imager (GOCI), taking advantage of the satellite's unique 8 hourly local daytime sequential images. The GOCI-derived surface M2 tidal currents are validated with a comprehensive set of twenty-eight surface drifters and four mooring observations. The agreement is outstanding with the error variance less than 10% of the total variance. The gridded GOCI-derived tidal currents are also in good agreement with the Oregon State University (OSU) high-resolution regional tidal model of the China Seas. The detided mean flow shows a strong Changjiang plume extending hundreds of kilometers offshore, in agreement with the concurrent satellite sea surface temperature (SST) and sea surface salinity (SSS) distributions. The observed surface currents are compared with the daily mean flows derived from the Japan Coastal Ocean Predictability Experiment (JCOPE2). The model results are consistent with the observations, showing the sensitivity of Changjiang plume to wind forcing. The study clearly demonstrates the utility of geostationary satellite in mapping the surface currents over a wide (˜400 km), tidally dominated continental shelf.

  3. Integrated Circuit Stellar Magnitude Simulator

    Science.gov (United States)

    Blackburn, James A.

    1978-01-01

    Describes an electronic circuit which can be used to demonstrate the stellar magnitude scale. Six rectangular light-emitting diodes with independently adjustable duty cycles represent stars of magnitudes 1 through 6. Experimentally verifies the logarithmic response of the eye. (Author/GA)

  4. Current status and challenges of typhoon forecasting and warning systems in China

    Institute of Scientific and Technical Information of China (English)

    Duan Yihong

    2014-01-01

    China is one of the countries most severely suffering from tropical cyclones. The exact and timely forecasting and warning is of significant importance in fighting against tropical cyclones and mitigating their im pacts on China. The numerical weather prediction(NWP)system for tropical cyclone rainfall and strong wind is going to play a more and more important role. There is also a need for timely and user friendly modern war ning services in order to provide the governments and relevant authorities at all levels and general public with ty phoon forecasts and information about the associated disasters and response strategy services.

  5. Balancing development, energy and climate priorities in China. Current status and the way ahead

    International Nuclear Information System (INIS)

    This report is the China Country Report of the project: Projecting future energy demand: Balancing development, energy and climate priorities in large developing economies. Under this project four country studies have been carried out, on China, India, Brazil, and South Africa respectively. The focus of this report is on the energy sector policies that mainstream climate interests within development choices. The report gives a short introduction to the project and its approach, followed by analyses of Chinese energy, development and climate change and an assessment of cross-country results that gives a range of key indicators of the relationship between economic growth, energy, and local and global pollutants. (BA)

  6. Current Situations and Future Development Trend of Farmland Pre-warning Researches in China

    Institute of Scientific and Technical Information of China (English)

    Yongqi; JIANG; Xiangli; WU

    2014-01-01

    This paper summarized theory discussion,main research methods,contents,empirical and engineering researches of farmland prewarning in China.It stated that future researches of farmland pre-warning in China will focus on deepening application of farmland security prewarning models,revealing mechanism of changes in different farmland resources,establishing pre-warning models suitable for research areas,accurate evaluation and prediction of farmland security,and exploring establishing and improving farmland security monitoring system and operating mechanism of all levels.

  7. Statistical models for seismic magnitude

    Science.gov (United States)

    Christoffersson, Anders

    1980-02-01

    In this paper some statistical models in connection with seismic magnitude are presented. Two main situations are treated. The first deals with the estimation of magnitude for an event, using a fixed network of stations and taking into account the detection and bias properties of the individual stations. The second treats the problem of estimating seismicity, and detection and bias properties of individual stations. The models are applied to analyze the magnitude bias effects for an earthquake aftershock sequence from Japan, as recorded by a hypothetical network of 15 stations. It is found that network magnitudes computed by the conventional averaging technique are considerably biased, and that a maximum likelihood approach using instantaneous noise-level estimates for non-detecting stations gives the most consistent magnitude estimates. Finally, the models are applied to evaluate the detection characteristics and associated seismicity as recorded by three VELA arrays: UBO (Uinta Basin), TFO (Tonto Forest) and WMO (Wichita Mountains).

  8. A Survey of Current and Future Perceived Multi-National Corporation Manufacturing Training Needs in Tianjin, (T.E.D.A.) China.

    Science.gov (United States)

    Hickey, Will

    2001-01-01

    Describes a study that surveyed current and perceived future employer-provided training practices among multinational corporations manufacturing companies in the Tianjin Economic Development Area (T.E.D.A.) of China. Highlights include labor market; human resources management in China; workforce productivity; and return on investment. (Author/LRW)

  9. Status of road traffic injury rescue and current work in China

    Institute of Scientific and Technical Information of China (English)

    JIANG Bao-guo

    2011-01-01

    STATUS OF TRAFFIC INJURY IN CHINA According to WHO statistics,every year there are more than 1.2 million people who die in traffic accident,around three thousand every day,and about 50 million people injured in traffic accident.Economic loss due to traffic accidents is as high as 518 billion US dollar.

  10. Current Status and Development Prospect of Carbon Sequestration Forestry in China

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Carbon sequestration forestry plays an important role in climate change and global warming mitigation, and thus gains more and more attention around the world. The paper introduced the concept, the significance and the status of carbon sequestration forestry in China, discussed existing issues and put forward countermeasures and suggestions to address these issues. Finally, development prospect of carbon sequestration forestry was analyzed.

  11. Current Status and Prospects of Oil and Gas Pipelines in China

    Institute of Scientific and Technical Information of China (English)

    Pu Ming

    2010-01-01

    @@ By the end of 2009,the total length of existing oil and gas pipelines in China had reached 75×103 km.The pipelines include 38×103 km of gas pipelines,20×103km of crude oil pipelines and 17×103 km of oil product pipelines,framing a trans-regional pipeline network for the oil and gas delivery.

  12. A Snapshot of the Current Status of Social Work Education in Mainland China

    Science.gov (United States)

    Bai, Jieru; Daley, James

    2014-01-01

    This article compares 49 colleges and universities in mainland China on the level of social work education, department and school affiliation, and duration of the program. Findings indicate great diversity in all 3 categories. Bachelor's degrees of social work are offered in 83.3% of the programs, and 38.8% of the programs offer master's…

  13. Water Resources and Agricultural Water Use in the North China Plain: Current Status and Management Options

    Science.gov (United States)

    Serious water deficits with deteriorating environmental quality are threatening agricultural sustainability in the North China Plain (NCP). This paper addresses spatial and temporal availability of water resources in the NCP, and identifies the effects of soil management, irrigation and crop genetic...

  14. China's Bilingual Education Policy and Current Use of Miao in Schools

    Science.gov (United States)

    Zhang, Shuang

    2008-01-01

    Bilingual teaching in which ethnic minority spoken and written language are used along with the Han language is China's basic policy for minority education. By means of a survey of the present state of the use of Miao written language in teaching, this article analyzes problems in the policies for minority-language teaching in ethnically mixed…

  15. Nuclear agricultural sciences in China. Current status and suggestion on future development

    International Nuclear Information System (INIS)

    This paper reviewed the main achievements of nuclear agricultural sciences, analyzed its developmental gap and provided some thoughts on its future development in China. Since the research and application of nuclear agricultural sciences was initiated in 1956, it has penetrated into the main fields of agriculture and made outstanding achievements, in some fields, China keeps a leading place in the world. By the end of 2001, China obtained 625 mutant varieties and strains, accounting for 27.2% of the total number in the world. The total planting area of the mutant varieties amounted to about 9 million hectares, and brought about an annual increase of grains by 3-4 million tons, cotton by 1.5-1.8 million tons, oilseeds by 0.75 million tons, with total annual economic benefit of 3.3-4.0 billion RMB Yuan. Among the released mutant varieties, 18 were awarded the national innovation prize. China approved national hygiene standards for 6 classes of irradiated foods, and 17 national technological standards of irradiated foods. The annual amount of irradiated foods and agricultural commodities ranged from 80-100 thousand tons. In general, the application of nuclear agricultural sciences in mutation breeding, space breeding, agricultural isotope tracers, food irradiation, sterile insect technique and radiation hormesis, has made considerable advancement and gained tremendous economic, social as well as ecological benefits. As a result, the IAEA and its technical officials highly evaluated nuclear agriculture in China. In 1999, China was approved as the RCA lead country for thematic agriculture. In considering its future development, the focus should be placed on the applied basic research and the development of some key technologies, and endeavor to make some breakthroughs in the molecular mechanism of mutation breeding and space breeding, irradiation quarantine technology , isotope tracing in environmental protection, animal health and production. The general objective is

  16. Analysis of the Network of Protected Areas in China Based on a Geographic Perspective: Current Status, Issues and Integration

    Directory of Open Access Journals (Sweden)

    Mengtian Cao

    2015-11-01

    Full Text Available With the continued growth of protected areas (PAs in China in terms of the number, coverage and varieties of protected objects, how to efficiently manage the protected areas to ensure both resource protection and environmental protection has become a crucial research question. By applying a geographic perspective in an analysis of the development and evolution of protected areas in China, this paper presents the results of an analysis focused on the status and the types of current approaches to the management of natural protected areas to reveal the problems that exist in their management and to further explore an integration strategy for the protected area network. It proposes that the future management of protected areas should prioritize their legal status, the sustainable livelihood of individuals living in close proximity to them, and the establishment of a unified database to achieve grid and information management of the protected areas.

  17. A brief study of the existing problems and possible solutions to current senior schools' oral English teaching in China

    Institute of Scientific and Technical Information of China (English)

    Ruan Xingwu; Zhang Ling

    2015-01-01

    with the development of China's integration into the global economy,English has become an essential tool to communicate and a substantial quality that anyone in modern society is supposed to acquire,which can be directly reflected by whether you can express yourself fluently and accurately in English.Due to the current College Entrance Examination,senior school's oral English teaching has long been underrated,which results in the problem that most of the senior students cannot speak English well,much less communicating with foreigners in a confident way.This essay will argue that the present situation of oral English teaching in senior schools of Tongling city,Anhui province,China can be improved by creating a livelier atmosphere,constructing a more genuine context and varying the activities of oral English.

  18. Current genetic counseling in China%中国目前的遗传咨询

    Institute of Scientific and Technical Information of China (English)

    章远志; Nanbert ZHONG

    2006-01-01

    @@ In 1975, the American Society of Human Genetics adopted the following definition of genetic counseling: genetic counseling is a communication process which deals with the human problems associated with the occurrence or risk of occurrence of a genetic disorder in a family. This definition indicates that genetic counseling is the delivery of information about genetic diseases, including genetic risks, natural history of the disease, and clinical management of the disease, to patients and their families. Although genetic counseling is not a new word for both western countries and China, the development of which is quite different. Many excellent genetic counseling programs have been developed since then in developed countries, whereas there is no formal one in China. In the United States, professionals who carry out genetic counseling must have taken a professional training and have had the certificate of American Board of Genetic Counseling (ABGC) (www.abgc.net). The ABGC prepares and administers examinations to certify individuals who provide services in the medical genetics specialty of genetic counseling, and accredits training programs in the field of genetic counseling. There are more than two dozen master degree programs of genetic counseling accredited by the ABGC with either full, interim, or recognized new programs (www.abgc.net). There are twenty-one full credential programs in the United States, three in Australia, three in Canada and two in United Kingdom (www.abgc.net). Looking through all over the China, there is no any official genetic counseling program, so neither any professional genetic counselor. Genetic counseling in China now is not offered by professionally trained genetic counselors, but clinicians such as pediatricians or obstetricians[1]. These clinicians who performing genetic counseling in China have not been trained professionally on genetic counseling. Further more, there is no any board to certificate counselors.

  19. Current meter components and other data from fixed platforms from the East China Sea (Tung Hai) as part of the United States/Peoples Republic of China Cooperative Study from 03 June 1980 to 04 August 1981 (NODC Accession 8700311)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Current meter components data were collected from fixed platforms from the East China Sea (Tung Hai) from 03 June 1980 to 04 August 1981. Data were collected by the...

  20. China.

    Science.gov (United States)

    1983-12-01

    This discussion of China focuses on the following: the people; geography; history (early history, 20th century China, the People's Republic of China; the "Great Leap Forward" and the Sino Soviet Split, the Cultural Revolution, and Mao's death and present directions); government (state structure, Chinese Communist Party, and legal system); education; economy; foreign relations; defense; and relations between China and the US. As of 1982, China's population totaled just over 1.008 billion with an annual growth rate of 1.5%. Life expectancy is 68 years. Government authorities endorsed birth control in the 1950s, played it down in 1958, and began to promote it again in 1962. The present family planning program began in the early 1970s and has become more fully mobilized since 1979. The largest ethnic group is the Han Chinese, who constitute 93.3% of the total population. The People's Republic of China, located in eastern Asia, is almost as large as the European continent. 2/3 of China's area is mountainous or semidesert; only about 1/10 is cultivated. China is the oldest continuous major world civilization with records dating back about 3500 years. Mao's death in September 1976 removed a towering figure from Chinese politics and set off a scramble for succession. The post 11th Party Congress leadership has emphasized economic development and renounced the mass political movements of prior years. Important educational reforms were made in early 1978. Since 1979, the Chinese leadership has moved toward more pragmatic positions in almost all fields. The Chinese government has always been subordinate to the Chinese Communist Party (CCP), its role being to implement party policies. The primary instruments of state power are the State Council, an executive body corresponding to a cabinet, and the NPC, a legislative body. China has made impressive progress in primary education since 1949. About 93% of eligible children are enrolled in 1st grade, though only 65% finish primary

  1. Current status and trends of wheat genetic transformation studies in China

    Institute of Scientific and Technical Information of China (English)

    HE Yi; WANG Qiong; ZENG Jian; SUN Tao; YANG Guang-xiao; HE Guang-yuan

    2015-01-01

    More than 20 years have passed since the ifrst report on successful genetic transformation of wheat. With the establishment and improvement of transformation platform, great progresses have been made on wheat genetic transformation both on its fundamental and applied studies in China, especial y driven by the National Major Project for Transgenic Organism Breed-ing, China, initiated in 2008. In this review, wheat genetic transformation platform improvement and transgenic research progresses including new techniques applied and functional studies of wheat quality, yield and stress tolerant related genes and biosafety assessment are summarized. The existing problems and the trends in wheat transformation with traditional methods combined with genomic studies and genome editing technology are also discussed.

  2. Current status of clinical nursing specialists and the demands of osteoporosis specialized nurses in Mainland China

    Directory of Open Access Journals (Sweden)

    Xu Tian

    2014-09-01

    Full Text Available The clinical nursing specialist (CNS is an expert who applies an expanded range of practical, theoretical, and research-based competencies to the care of patients within in a specialty clinical area within the larger discipline of nursing. A large number of studies consistently conclude that the CNS is a valuable healthcare resource that provides high-quality clinical and evidence-based nursing practice and improves patient outcome. The CNS has been involved in healthcare practices for many years, with an increasingly diverse role. However, the training for the CNS in China is only in a preliminary developmental stage. The aim of this article is to review the history and development of the CNS role. Furthermore, the epidemiologic status of osteoporosis, as well as the feasibility and necessity of developing training programs in China for the osteoporosis CNS, will be discussed.

  3. Information service of special libraries in China:Current status and prospect

    Institute of Scientific and Technical Information of China (English)

    LIU; Xiwen

    2008-01-01

    The article firstly summarizes the structure and development of special libraries in China.Then,the best practices of the documentation,information and consulting services of the Chinese special libraries in the digital and networking environment are provided.It finally explores the approaches for the special libraries to offer new professional services in order to meet the needs for knowledge-based services.

  4. Current Status and Prospects of Oil and Gas Pipelines in China

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    @@ By the end of 2008,the total length of existing oil and gas pipelines in China had reached 6.3×104 km.These pipelines include 3.2×104 km of natural gas pipelines,1.8×104 km of crude oil pipelines and 1.3×104 km of oil products pipelines,laying the foundation for establishing a network of trans-regional oil and gas pipelines.

  5. Current Situation and Prospect of Pumped-Storage Hydropower Plant in China

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    @@ With the rapid development of national economy in China, pumped-storage power plant (PSPP) has developed very fast for its special stable and dynamic benefits in recent years.Because of the ever-increasing power load and its peak-to-valley ratio, customers have higher expectation for the security and quality of power supply. PSPPs are playing a role in load regulation,energy saving and reliable operation of power girds with its unique peak-shifting character.

  6. The current situation and future of commercial vehicle powertrain assembly in China

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    A total of 2.501 million commercial vehicles were produced in China in 2007,a year on year increase of 22.2 percent,and their growth rates exceeded that of passenger vehicles for the first time over the past years.The commercial vehicle powertrain production and export/import saw substantial growths,thanks to the technical import,joint venture and cooperation as well as self-dominated development…

  7. INFLUENCE OF FAMILY BACKGROUND ON CURRENT FAMILY WEALTH IN RURAL CHINA

    OpenAIRE

    SATO, Hiroshi; Li, Shi

    2013-01-01

    This paper examines the influence of family human capital on offspring's economic status in post reform rural China, using nationally representative cross-sectional survey of rural households for 2002. Focuses are on family class origin and occupational experiences. The major findings are as follows. First, parental experiences of a nonagricultural family business before collectivization have a positive and statistically significant effect on offspring's family wealth. Second, the offspring o...

  8. Revolution and family in rural China: influence of family background on current family wealth

    OpenAIRE

    SATO, Hiroshi; Shi, Li

    2007-01-01

    This paper examines the influence of family human capital on offspring's economic status in post reform rural China by concentrating on the father-son relationship. We focus on two indicators of family background: family class origin (jiating chengfen) and occupational experience. The results of a family wealth function for 2002 suggest that, after controlling for other individual and family characteristics, both measures of family background have a significant influence on family wealth. Fir...

  9. Current Status and Development Trend of Natural Gas Industry in China

    Institute of Scientific and Technical Information of China (English)

    Jingming Li; Dongxu Li; Xiaojun Li; Fudong Zhang

    2004-01-01

    In China, the proven reserves of natural gas is 3.86 trillion cubic meters (rcm). This figure will quite possibly increase at a high speed in the future. At present, the annual production of natural gas has exceeded 34 billion cubic meters (bcm), which, likewise, will rise sharply. The pipeline construction has basically taken shape, which will be gradually perfected. And the gas consumption market is in the startup stage, which will be rapidly expanded in the quite near future.

  10. The current economic situation in China and its impact on the Czech Republic

    OpenAIRE

    Hana Stverkova

    2016-01-01

    Nowadays, many companies try to enter to the international sector and to extend here their activity. Their international cooperation is an integral part of the action; it is necessary to know the cultural differences. Therefore it is important to understand the social development including the Social Progress Index and the secondary analysis of an economic situation in China; and its subsequent impact on the economy not only in the Czech Republic based on evaluation of Czech-Chinese business ...

  11. Three-dimensional calculations of the currents in the Huanghai Sea and East China Sea during June of 1999

    Institute of Scientific and Technical Information of China (English)

    Huiqun Wang; Yaochu Yuan; Yonggang Liu; Mingyu Zhou

    2003-01-01

    Based on the wind and hydrographic data obtained by R/V Xiangyanghong 14 duringJune of 1999, the currents in the Huanghai Sea and East China Sea are computed by the three dimen-sional non-linear diagnostic, semidiagnostic models and prognostic in the σ coordinate. The computed re-sults show that the density and velocity fields and so on have been adjusted when time is about 3 days,namely the solution of semidiagnostic calculation is obtained. In the northwest part of the computed re-gion, the Huanghai coastal current flows southeastward, and then it flows out the computed region southof Cheju Island. In the west side of the southern part of the computed region, there is other current,which is mainly inshore branch of Taiwan Warm Current, and it flows cyclonically and turns to thenortheast. In the region north of the above two currents, there is a cyclonic eddy southwest of Cheju Is-land, and it has characteristics of high density and low temperature. There is an offshore branch of Tai-wan Warm Current in the west side of the Kuroshio, and it makes a cyclonic meander, then flows north-eastward. The Kuroshio in the East China Sea is stronger, and flows northeastward. Its maximum hori-zontal velocity is 108.5 cm/s at the sea surface, which is located at the northern boundary, and it is106.1 cm/s at 30 m level, 102.2 cm/s at 75 m level and 85.1 cm/s at 200 m level, respectively, whichare all located at the southern boundary. Comparing the results of diagnostic calculation with those ofsemidiagnostic and prognostic calculations indicates that the horizontal velocity field agrees qualitatively,and there is a little difference between them in quantity. The comparison between the computed veloci-ties and the obeered velocities at the mooring station show that they agree each other.

  12. Current use of immunosuppressive agents in inflammatory bowel disease patients in East China

    Institute of Scientific and Technical Information of China (English)

    Li-Juan Huang; Qin Zhu; Min Lei; Qian Cao

    2009-01-01

    AIM: To investigate immunosuppressive agents used to treat inflammatory bowel disease (IBD) in East China. METHODS: A retrospective review was conducted, involving 227 patients with IBD admitted to Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University from June 2000 to December 2007. Data regarding demographic, clinical characteristics and immunosuppressants usage were analyzed. RESULTS: A total of 227 eligible patients were evaluated in this study, including 104 patients with Crohn's disease and 123 with ulcerative colitis. Among the patients, 61 had indications for immunosuppressive agents use. However, only 21 (34.4%) received immunosuppressive agents. Among the 21 patients, 6 (37.5%) received a subtherapeutic dose of azathioprine with no attempt to increase the dosage. Of the 20 patients that received immunosuppressive agent treatment longer than 6 mo, 15 patients went into remission, four patients were not affected and one relapsed. Among these 20 patients, four patients suffered from myelotoxicity and one suffered from hepatotoxicity. CONCLUSION: Immunosuppressive agents are used less frequently to treat IBD patients from East China compared with Western countries. Monitoring immunosuppressive agent use is recommended to optimize dispensation of drugs for IBD in China.

  13. Analysis of China's Renewable Energy Development under the Current Economic and Technical Circumstances

    Institute of Scientific and Technical Information of China (English)

    Dan Shi

    2009-01-01

    At present, the development of renewable energy relies mainly on government support. The government invests in a considerable number of projects to improve public welfare and to assist in poverty relief. If China is to replace fossil fuels on a large scale with renewable energy sources, the production costs und prices of renewable energy must he brought down. All countries are facing the challenge of moving to a more secure and low-carbon energy system without weakening economic and social development. In this regard, China is facing an even greater challenge in terms of economic cost, as cheap coal remains the main energy form. Technical innovation and industrialization in the area of renewable energy is an important means of lowering cost. China is in for a period of high-speed development of its economy and the rising demand for energy is irreversible. If the technical progress and development speed of renewable energy lags behind the growth in demand, it will be difficult to realize the improvement of its energy structure.

  14. Current situation of China rare earth industry and outlook for "2011-2015" period (continued)

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    There are some problems existing in China rare earth industry currently, including weak development of new rare earth application technologies, slow industrialization of research achievements, insufficient investment in R & D of rare earth high technologies & applications, weak innovative capabilities and lack of middle and high-end products. Rare earth enterprises are mainly concentrated in the upstream and middle stream of the industrial chain. Overall strengths of rare earth processing and application enterprises are not strong, Most rare earth products are low grade primary or intermediate products with low added value.

  15. The Current Situation, Problems and Countermeasure Research of Chain-management Development in China

    Directory of Open Access Journals (Sweden)

    Hongyun Li

    2014-02-01

    Full Text Available At present, Chinese Chain-management, which is still at the initial stage of development, is in obvious disadvantage in the competition with foreign large-scale chain enterprises. Merger, franchise and some other approaches should be adopted by Chinese chain enterprises in order to broad in scale. Furthermore, more attention should be paid to informatization system, constant optimization and upgrade information system. By choosing good promotion and advertising modes to increase customer’s awareness to chain enterprises brand, we could smoothly implement the chain enterprise brand strategy. Finally, chain enterprise management in China will expand under the context of new market.

  16. Calibration de la magnitude absolue.

    Science.gov (United States)

    Gómez, A. E.; Mennessier, M. O.

    Les parallaxes mesurées par Hipparcos permettront d'obtenir des magnitudes absolues individuelles meilleures que ±0m4 pour les étoiles placées dans un volume de rayon inférieur à 150 pc environ autour du soleil. Les algorithmes développés dans le cadre de l'exploitation des données d'Hipparcos, basés sur la méthode de maximum de vraisemblance, permettent non seulement de faire une estimation de la magnitude absolue moyenne d'un groupe physiquement homogène d'étoiles, de son comportement cinématique et de sa distribution spatiale mais aussi d'estimer une magnitude absolue individuelle pour chaque étoile de l'échantillon considéré.

  17. Epidemiology and management of osteoporosis in the People's Republic of China: current perspectives.

    Science.gov (United States)

    Lin, Xiao; Xiong, Dan; Peng, Yi-Qun; Sheng, Zhi-Feng; Wu, Xi-Yu; Wu, Xian-Ping; Wu, Feng; Yuan, Ling-Qing; Liao, Er-Yuan

    2015-01-01

    With the progressive aging of the population, osteoporosis has gradually grown into a global health problem for men and women aged 50 years and older because of its consequences in terms of disabilities and fragility fractures. This is especially true in the People's Republic of China, which has the largest population and an increasing proportion of elderly people, as osteoporosis has become a serious challenge to the Chinese government, society, and family. Apart from the fact that all osteoporotic fractures can increase the patient's morbidity, they can also result in fractures of the hip and vertebrae, which are associated with a significantly higher mortality. The cost of osteoporotic fractures, moreover, is a heavy burden on families, society, and even the country, which is likely to increase in the future due, in part, to the improvement in average life expectancy. Therefore, understanding the epidemiology of osteoporosis is essential and is significant for developing strategies to help reduce this problem. In this review, we will summarize the epidemiology of osteoporosis in the People's Republic of China, including the epidemiology of osteoporotic fractures, focusing on preventive methods and the management of osteoporosis, which consist of basic measures and pharmacological treatments.

  18. Implications of genetics and current protected areas for conservation of 5 endangered primates in China.

    Science.gov (United States)

    Liu, Zhijin; Liu, Guangjian; Roos, Christian; Wang, Ziming; Xiang, ZuoFu; Zhu, Pingfen; Wang, Boshi; Ren, Baoping; Shi, Fanglei; Pan, Huijuan; Li, Ming

    2015-12-01

    Most of China's 24-28 primate species are threatened with extinction. Habitat reduction and fragmentation are perhaps the greatest threats. We used published data from a conservation genetics study of 5 endangered primates in China (Rhinopithecus roxellana, R. bieti, R. brelichi, Trachypithecus francoisi, and T. leucocephalus); distribution data on these species; and the distribution, area, and location of protected areas to inform conservation strategies for these primates. All 5 species were separated into subpopulations with unique genetic components. Gene flow appeared to be strongly impeded by agricultural land, meadows used for grazing, highways, and humans dwellings. Most species declined severely or diverged concurrently as human population and crop land cover increased. Nature reserves were not evenly distributed across subpopulations with unique genetic backgrounds. Certain small subpopulations were severely fragmented and had higher extinction risk than others. Primate mobility is limited and their genetic structure is strong and susceptible to substantial loss of diversity due to local extinction. Thus, to maximize preservation of genetic diversity in all these primate species, our results suggest protection is required for all sub-populations. Key priorities for their conservation include maintaining R. roxellana in Shennongjia national reserve, subpopulations S4 and S5 of R. bieti and of R. brelichi in Fanjingshan national reserve, subpopulation CGX of T. francoisi in central Guangxi Province, and all 3 T. leucocephalus sub-populations in central Guangxi Province. PMID:26372167

  19. New Concept for Assessment of Tidal Current Energy in Jiangsu Coast, China

    OpenAIRE

    Ji-Sheng Zhang; Jun Wang,; Ai-Feng Tao; Jin-Hai Zheng; Hui Li

    2013-01-01

    Tidal current energy has attracted more and more attentions of coastal engineers in recent years, mainly due to its advantages of low environmental impact, long-term predictability, and large energy potential. In this study, a two-dimensional hydrodynamic model is applied to predict the distribution of mean density of tidal current energy and to determine a suitable site for energy exploitation in Jiangsu Coast. The simulation results including water elevation and tidal current (speed and dir...

  20. WAVE CURRENT FORCES ON THE PILE GROUP OF BASE FOUNDATION FOR THE EAST SEA BRIDGE, CHINA

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    On the basis of the two structures of the bridge foundation designed for the East Sea Bridge, the wave current forces on four types of oblique piles, the pile group and the single piles at different positions in the pile group considering the effect of the super structures were experimentally investigated. The relationship between the wave current forces and the associated wave parameters, and the comparison of the wave current forces on the pile groups and the single piles were systematically analyzed. The group effectiveness and the reduction coefficient for the wave current forces on the group were examined for engineering design.

  1. Genotyping of Brucella melitensis and Brucella abortus strains currently circulating in Xinjiang, China.

    Science.gov (United States)

    Sun, Ming-Jun; Di, Dong-Dong; Li, Yan; Zhang, Zhi-Cheng; Yan, Hao; Tian, Li-Li; Jing, Zhi-Gang; Li, Jin-Ping; Jiang, Hai; Fan, Wei-Xing

    2016-10-01

    Brucellosis is a well-known zoonotic disease that can cause severe economic and healthcare losses. Xinjiang, one of the biggest livestock husbandry sectors in China, has gone through increasing incidence of brucellosis in cattle and small ruminants recently. In this paper, 50 B. melitensis strains and 9 B. abortus strains collected from across Xinjiang area (from 2010 to 2015) were genotyped using multiple locus variable-number tandem-repeat (VNTR) analysis (MLVA) and multi-locus sequence typing (MLST). Based on 8 loci (MLVA-8), 50 B. melitensis strains were classified into three genotypes. Genotypes 42 (n=38, 76%) and 63 (n=11, 22%) were part of the East Mediterranean group, and one genotype with pattern of 1-5-3-13-2-4-3-2 represents a single-locus variant from genotype 63. MLVA-16 resolved 50 B. melitensis strains into 28 genotypes, of which 15 are unique to Xinjiang and 10 are in common with those in adjacent country Kazakhstan and neighboring provinces of China. Minimum Spanning Tree (MST) analysis implies that B. melitensis strains collected from across Kazakhstan, Xinjiang and China areas may share a common origin. Nine B. abortus strains were sorted into three genotypes by MLVA-8, genotypes 36 (n=7, 77.8%), 86 (n=1, 11.1%) and a new genotype with pattern of 4-5-3-13-2-2-3-1. Each B. abortus strain showed distinct MLVA-16 genotypes, suggesting that B. abortus species may possess more genetic diversity than B. melitensis. Using MLST, most B. melitensis strains (n=49) were identified as sequence type ST8, and most B. abortus strains (n=8) were recognized as ST2. Two new sequence types, ST37 and ST38, represented by single strain from B. melitensis and B. abortus species respectively, were also detected in this study. These results could facilitate the pathogen surveillance in the forthcoming eradication programs and serve as a guide in source tracking in case of new outbreaks occur.

  2. Current situation and consideration of training base hospitals for residents of neurosurgical specialization in China

    Directory of Open Access Journals (Sweden)

    Feng-zeng JIAN

    2015-07-01

    Full Text Available Resident training of neurosurgical specialization will be tried and carried out in all over China. From the point of view of training base hospitals, a majority of 3A level hospitals have sufficient patients and good equipments which will ensure the success of training process; however, division of subspecialty, teaching motivation and teaching method still have a great potential to improve. In order to establish and improve training bases for residents of specialization, supervision from national administrative department should be strengthened; professional society also plays an important role in standardizing and controlling the training quality. Considering our nation's situation, integration of postgraduate education and resident training is worth of discussion. DOI: 10.3969/j.issn.1672-6731.2015.07.015

  3. A Review of Current Researches on Blast Load Effects on Building Structures in China

    Institute of Scientific and Technical Information of China (English)

    LI Zhongxian; DU Hao; BAO Chunxiao

    2006-01-01

    The damages of building structures subjected to multifarious explosions cause huge losses of lives and property.It is the reason why the blast resistance and explosion protection of building structures become an important research topic in the civil engineering field all over the world.This paper provides an overview of the research work in China on blast loads effect on building structures.It includes modeling blast shock wave propagation and their effects,the dynamic responses of various building structures under blast loads and the measures to strengthen the building structures against blast loads.The paper also discusses the achievements and further work that needs be done for a better understanding of the blast loads' effects on building structures,and for deriving effective and economic techniques to design new or to strengthen existing structures.

  4. Current status of research and development for nuclear heating reactor in China

    International Nuclear Information System (INIS)

    At present the coal is the main source for district heating in China. It results in serious problems for transportation and pollution. Nuclear district heating reactor can substitute the coal and supply the clear and ecenomic heat energy for the cities. A feasibility studies for a district heating reactor with the power of 450 MW(t) in Harbin were carried out. With cooperation of heating boilers heat demand of 1.2 million pupulation can be satisfied. 600 x 103 tons coal per year can be saved. The temperature of the heat grid is 130/70 deg C. The main parameters of the 450 MW(t) and 5 MW(t) heating reactors are given. The technical design, safety aspects, economic analysis and the stability of test loop are also discussed. (Liu)

  5. Current Situation and Characteristics Analysis on Cerebral Palsy Rehabilitation in China

    Institute of Scientific and Technical Information of China (English)

    王琴玉

    2007-01-01

    Objective: To investigate the therapeutic characteristics and patterns of cerebral palsy rehabilitation in China. Method: To elaborate the specific acupuncture methods and action mechanism of cerebral palsy in China by combining analysis on the therapeutic situation of cerebral palsy from both home and abroad with research literatures. Conclusion: Acupuncture has great potential in social and economic benefits in the treatment of cerebral palsy. It is necessary to develop prospective, multi-center and randomly controlled trials on acupuncture treatment of cerebral palsy with exact and feasible therapeutic plans and establish acupuncture-centered cerebral palsy rehabilitation system with Chinese characteristics.%目的:探讨中国脑性瘫痪的康复治疗特点及模式.方法:分析国内外脑性瘫痪治疗现状,结合文献详细阐述国内采用针灸治疗脑瘫的具体方法及其机理研究.结论:针灸治疗脑瘫有着极大的潜在社会效益和经济效益.宜开展针灸治疗小儿脑瘫的前瞻性、多中心、随机对照试验,探索出疗效确切、可行性强的针灸治疗方案,建立以针灸为中心的有中国特色的脑性瘫痪康复体系.

  6. Three dimensional diagnostic, semidiagnostic and prognostic calculations of current in the East China Sea in April of 1994

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Three dimensional diagnostic, semidiagnostic and prognostic models in the a-coordinate are used to compute the current in the Fast China Sea with wind and hydrographic data obtained from the investigation of ocean fluxes in the East China Sea during the cruise of April 1994. The computed results show that: the density and velocity fields and so on have been adjusted when time t≈ 23 d,i. e., the solution of semidiagnostic calculation has been obtained. The quasi-steady state solution also has been reached after about 60 d. Comparing the results of diagnostic calculation with those of semidiagnostic and prognostic calculations, it is found that they agree qualitatively For example, they all show that: (1) The Kuroshio flows along the shelf break of 200~ 1 000m isobaths; (2) In the southeastern part of the computational region there is a stronger counter-current with an anticyclonic eddy; (3) The volume transport through Section lPN is about 30 × 106m3/s and so on. However there are some quantitative differences between them. For example, (1) For the semidiagnostic results the Kuroshio current is stronger and clearer than that for diagnostic results and the Kuroshio width is more narrow than that for diagnostic results. This shows that the semidiagnostic calculation can better reflect the topography effect; (2) In most computed region the vertical component of velocity intensifies for semidiagnostic result, especially on the shelf break. Comparing the results of semidiagnostic calculation with those of prognostic calculation, they agree qualitatively, and also agree quantitatively in the middle of computed region.

  7. Observed evidence of the anomalous South China Sea western boundary current during the summers of 2010 and 2011

    Science.gov (United States)

    Shu, Yeqiang; Xue, Huijie; Wang, Dongxiao; Xie, Qiang; Chen, Ju; Li, Jian; Chen, Rongyu; He, Yunkai; Li, Daning

    2016-02-01

    Seven years of directly measured current data from a mooring in the Xisha area of the South China Sea (SCS), together with shipboard ADCP and satellite data, have shown the western boundary current (WBC) anomaly and its vertical structure during the summers of 2010 and 2011. The observed WBC presented obvious year-to-year variability, especially in the summer. Overall, the summer mean velocity at the mooring site over 7-year (2007-2013) was northeastward. The moored ADCP showed that the northeastward velocity was particularly strong in the summer of 2010, but the increase was confined in the upper 120 m. In contrast, the northeastward current disappeared throughout the observed depth range (from 50 to 450 m) in the summer of 2011. Even at the deepest observed position, the monthly velocity anomalies reached 14 cm s-1 westward and 12 cm s-1 southward in the zonal and meridional directions, respectively. Both the Vietnam offshore current (VOC) and double gyres in the western SCS disappeared and the southern anticyclonic gyre expanded to strengthened the northward WBC in the summer of 2010. However, in summer of 2011, the VOC intensified, and the northern cyclonic gyre enlarged with its northern edge reaching 18°N, slightly north of mooring site, which weakened the northeastward WBC. The observed SCS circulation anomalies during 2010 and 2011 were mainly induced by the basin-scale wind field anomalies associated with the 2009/2010 El Niño and 2010/2011 La Niña.

  8. Radiation doses - maps and magnitudes

    International Nuclear Information System (INIS)

    A NRPB leaflet in the 'At-a-Glance' Series presents information on the numerous sources and magnitude of exposure of man to radiation. These include the medical use of radiation, radioactive discharges to the environment, cosmic rays, gamma rays from the ground and buildings, radon gas and food and drink. A Pie chart represents the percentage contribution of each of those sources. Finally, the terms becquerel, microsievert and millisievert are explained. (U.K.)

  9. Homogeneous determination of maximum magnitude

    OpenAIRE

    Meletti, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia; D'Amico, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia; Martinelli, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia

    2010-01-01

    This deliverable represents the result of the activities performed by a working group at INGV. The main object of the Task 3.5 is defined in the Description of Work. This task will produce a homogeneous assessment (possibly multiple models) of the distribution of the expected Maximum Magnitude for earthquakes expected in various tectonic provinces of Europe, to serve as input for the computation and validation of seismic hazard. This goal will be achieved by combining input from earthqu...

  10. SAR observation and numerical modeling of tidal current wakes at the East China Sea offshore wind farm

    Science.gov (United States)

    Li, XiaoMing; Chi, Lequan; Chen, Xueen; Ren, YongZheng; Lehner, Susanne

    2014-08-01

    A TerraSAR-X (TS-X) Synthetic Aperture Radar (SAR) image acquired at the East China Sea offshore wind farm presents distinct wakes at a kilometer scale on the lee of the wind turbines. The presumption was that these wakes were caused by wind movement around turbine blades. However, wind analysis using spaceborne radiometer data, numerical weather prediction, and in situ measurements suggest that the prevailing wind direction did not align with the wakes. By analyzing measurement at the tidal gauge station and modeling of the tidal current field, these trailing wakes are interpreted to have formed when a strong tidal current impinged on the cylindrical monopiles of the wind turbines. A numerical simulation was further conducted to reproduce the tidal current wake under such conditions. Comparison of the simulated surface velocity in the wake region with the TS-X sea surface backscatter intensity shows a similar trend. Consequently, turbulence intensity (T.I.) of the tidal current wakes over multiple piles is studied using the TS-X observation. It is found that the T.I. has a logarithmic relation with distance. Furthermore, another case study showing wakes due to wind movement around turbine blades is presented to discuss the differences in the tidal current wakes and wind turbine wakes. The conclusion is drawn that small-scale wakes formed by interaction of the tidal current and the turbine piles could be also imaged by SAR when certain conditions are satisfied. The study is anticipated to draw more attentions to the impacts of offshore wind foundations on local hydrodynamic field.

  11. Current status of pediatric kidney transplantation in China: data analysis of Chinese Scientific Registry of Kidney Transplantation

    Institute of Scientific and Technical Information of China (English)

    Liu Longshan; Zhang Huanxi; Fu Qian; Chen Liping; Sun Chuanhou; Xiong Yunyi; Shi Bingyi

    2014-01-01

    Background Kidney transplantation (KTx) is the primary therapy for children with renal failure.Unlike KTx in adult patients,it is commonly agreed that pediatric KTx in China is far behind that of America.There has been no systematic analysis of Chinese pediatric KTx reported.This study aimed to demonstrate the current status of pediatric KTx in China.Methods Registry data of pediatric KTx (1983-2012) from Chinese Scientific Registry of Kidney Transplantation (CSRKT) were retrospectively analyzed.Results There were 851 pediatric KTx from 102 transplant units.The recipients were (15.4±2.5) years of age,93.9% of who were over 10 years old.Chronic glomerulonephritis and pyelonephritis accounted for 75.6% of recognized primary diseases.Allografts were from deceased donors (72.2%) or living donation (27.7%).The patient survival for 1,3,5,and 10 years was 96.9%,94.2%,92.3%,and 92.3% and the graft survival was 94.6%,91.4%,86.3%,and 79.2%,respectively.The majority of post-transplant complications were acute rejection and infections.Annual transplant reached the peak in 2008 (n=114),and decreased sharply in 2006 (n=41) and 2010 (n=57).The percentage of pediatric KTx in total KTx was highest in 2007 (1.95%) and decreased to trough level in 2010 (1.0%).Living donation increased by 32.5-folds from 2004 to 2008 and then decreased by 86.6% till 2010.The percentage of living donation in pediatric or total KTx dynamically changed in a similar manner,while living donation ratio in pediatric KTx was much higher.Conclusions Kidney transplant can provide long-term benefits to pediatric recipients.Rejection and infections are worthy of concern during follow-up.Pediatric kidney transplant in China is very much lagging behind that in developed countries.Living donation played an important role in its development in the past decades.New strategies for implementation are encouraged to increase the priority of uremic children in organ allocation so as to

  12. A brief study of the existing problems and possible solutions to current senior schools’ oral English teaching in China

    Institute of Scientific and Technical Information of China (English)

    Ruan; Xingwu; Zhang; Ling

    2015-01-01

    with the development of China’s integration into the global economy,English has become an essential tool to communicate and a substantial quality that anyone in modern society is supposed to acquire,which can be directly reflected by whether you can express yourself fluently and accurately in English.Due to the current College Entrance Examination,senior school’s oral English teaching has long been underrated,which results in the problem that most of the senior students cannot speak English well,much less communicating with foreigners in a confident way.This essay will argue that the present situation of oral English teaching in senior schools of Tongling city,Anhui province,China can be improved by creating a livelier atmosphere,constructing a more genuine context and varying the activities of oral English.

  13. Grand Research Plan for Neural Circuits of Emotion and Memory-Current status of neural circuit studies in China

    Institute of Scientific and Technical Information of China (English)

    Yuan-Gui Zhu; He-Qi Cao; Er-Dan Dong

    2013-01-01

    During recent years,major advances have been made in neuroscience,i.e.,asynchronous release,three-dimensional structural data sets,saliency maps,magnesium in brain research,and new functional roles of long non-coding RNAs.Especially,the development of optogenetic technology provides access to important information about relevant neural circuits by allowing the activation of specific neurons in awake mammals and directly observing the resulting behavior.The Grand Research Plan for Neural Circuits of Emotion and Memory was launched by the National Natural Science Foundation of China.It takes emotion and memory as its main objects,making the best use of cutting-edge technologies from medical science,life science and information science.In this paper,we outline the current status of neural circuit studies in China and the technologies and methodologies being applied,as well as studies related to the impairments of emotion and memory.In this phase,we are making efforts to repair the current deficiencies by making adjustments,mainly involving four aspects of core scientific issues to investigate these circuits at multiple levels.Five research directions have been taken to solve important scientific problems while the Grand Research Plan is implemented.Future research into this area will be multimodal,incorporating a range of methods and sciences into each project.Addressing these issues will ensure a bright future,major discoveries,and a higher level of treatment for all affected by debilitating brain illnesses.

  14. Teahouses and the Tea Art: A Study on the Current Trend of Tea Culture in China and the Changes in Tea Drinking Tradition

    OpenAIRE

    Li, Jie

    2015-01-01

    he subject of this thesis is tradition and the current trend of tea culture in China. In order to answer the following three questions whether the current tea culture phenomena can be called tradition or not; what are the changes in tea cultural tradition and what are the new features of the current trend of tea culture; what are the endogenous and exogenous factors which influenced the change in the tea drinking tradition , I did literature research from ancient tea classics and historic...

  15. Tidal elevation, current, and energy flux in the area between the South China Sea and Java Sea

    Science.gov (United States)

    Wei, Zexun; Fang, Guohong; Dwi Susanto, R.; Rameyo Adi, Tukul; Fan, Bin; Setiawan, Agus; Li, Shujiang; Wang, Yonggang; Gao, Xiumin

    2016-04-01

    The South China Sea (SCS) and the Java Sea (JS) are connected through the Karimata Strait, Gaspar Strait, and the southern Natuna Sea, where the tides are often used as open boundary condition for tidal simulation in the SCS or Indonesian seas. Tides, tidal currents, and tidal energy fluxes of the principle constituents K1, O1, Q1, M2, S2, and N2 at five stations in this area have been analyzed using in situ observational data. The results show that the diurnal tides are the dominant constituents in the entire study area. The constituent K1 has the largest amplitude, exceeding 50 cm, whereas the amplitudes of M2 are smaller than 5 cm at all stations. The amplitudes of S2 may exceed M2 in the Karimata and Gaspar straits. Tidal currents are mostly of rectilinear type in this area. The semi-major axes lengths of the diurnal tidal current ellipses are about 10 cm s-1, and those of the semidiurnal tidal currents are smaller than 5 cm s-1. The diurnal tidal energy flows from the SCS to the JS. The semidiurnal tidal energy flows from the SCS to the JS through the Karimata Strait and the eastern part of the southern Natuna Sea but flows in the opposite direction in the Gaspar Strait and the western part of the southern Natuna Sea. Harmonic analysis of sea level and current observation also suggest that the study area is located in the antinodal band of the diurnal tidal waves, and in the nodal band of the semidiurnal tidal waves. Comparisons show that the existing models are basically consistent with the observational results, but further improvements are necessary.

  16. 中国的科技传播现状研究%Researches on Current Situation of Technical Communication in the People's Republic of China

    Institute of Scientific and Technical Information of China (English)

    曾辉

    2003-01-01

    This article first discusses researches, basically from the western viewpoints, on current situation of technical communication education in China and technical communication opportunities in China. Later, the article proposes four areas that need further research. Researches on technical communication in China not only benefit China, but also help other countries to understand Chinese market and potential consuming power in technical communication market.%本文首先主要从西方的观点讨论中国的科技传播教育和机遇,然后提出了四个需要进一步研究的领域,指出研究中国的科技传播不仅对中国有利,而且也有助于其它国家了解中国的科技传播的市场和消费潜力.

  17. Current situations and technical development of energy-savings in China refrigeration industries

    International Nuclear Information System (INIS)

    The promotion of Energy Efficiency Standards and the implementation of Energy Labels have greatly improved energy efficiencies of Chinese refrigeration products in recent years. These products are now moving towards multiple heat sources and multiple functions, to obtain further energy-savings. Some typical products, such as solar energy refrigerators and air conditioning-water heater system are introduced. The current energy efficiencies of Chinese refrigeration products are also introduced in this paper. Some recommendations are given to make the standards accommodate these changes

  18. Expanding China

    Institute of Scientific and Technical Information of China (English)

    LisaChiu

    2003-01-01

    CHINA-Enabling A New Era of Changes paints a comprehensive and extremely up-to-date look at the current growth trends in China and examines ways to maintain this fast-paced growth for future generations.

  19. Talking about China's Current Rural Basic Education%当前中国农村基础教育浅析

    Institute of Scientific and Technical Information of China (English)

    薛顺寿

    2012-01-01

    农村基础教育直接关系到我国农业、农村、农民的发展,影响着国民经济和社会发展的全局。自改革开放以来,中国的农村基础教育事业有了很大发展,基本普及了九年义务教育。但由于农村教育的先天基础不足及城乡二元机构的长期存在,农村的基础教育状况并没有得到根本性的改观,许多突出问题依然存在。本文旨在对当前中国农村基础教育存在的问题进行分析的基础上,提出农村基础教育改革的发展策略。%Basic education in rural areas is directly related to the development of our agriculture,rural areas and farmers,and impact on global economic and social development.Since the reform and opening up,China's rural basic education has made significant progress,basically popularizing nine-year compulsory education.However,due to the innate basis of insufficient of rural education and urban and rural institutions exist for a long,the status of basic education in rural areas and not been fundamentally changed,many outstanding problems still exist.This article on the basis of analyzing the problems of China's current rural basic education,refers to the development strategy of basic education reform in rural areas.

  20. Solar Variability Magnitudes and Timescales

    Science.gov (United States)

    Kopp, Greg

    2015-08-01

    The Sun’s net radiative output varies on timescales of minutes to many millennia. The former are directly observed as part of the on-going 37-year long total solar irradiance climate data record, while the latter are inferred from solar proxy and stellar evolution models. Since the Sun provides nearly all the energy driving the Earth’s climate system, changes in the sunlight reaching our planet can have - and have had - significant impacts on life and civilizations.Total solar irradiance has been measured from space since 1978 by a series of overlapping instruments. These have shown changes in the spatially- and spectrally-integrated radiant energy at the top of the Earth’s atmosphere from timescales as short as minutes to as long as a solar cycle. The Sun’s ~0.01% variations over a few minutes are caused by the superposition of convection and oscillations, and even occasionally by a large flare. Over days to weeks, changing surface activity affects solar brightness at the ~0.1% level. The 11-year solar cycle has comparable irradiance variations with peaks near solar maxima.Secular variations are harder to discern, being limited by instrument stability and the relatively short duration of the space-borne record. Proxy models of the Sun based on cosmogenic isotope records and inferred from Earth climate signatures indicate solar brightness changes over decades to millennia, although the magnitude of these variations depends on many assumptions. Stellar evolution affects yet longer timescales and is responsible for the greatest solar variabilities.In this talk I will summarize the Sun’s variability magnitudes over different temporal ranges, showing examples relevant for climate studies as well as detections of exo-solar planets transiting Sun-like stars.

  1. 我国农业保险现状的统计分析%The Statistical Analysis of Current Situation of Agricultural Insurance of China

    Institute of Scientific and Technical Information of China (English)

    刘蓉

    2004-01-01

    The guarantee of insurance is crucial to the development of modern agriculture. The current development of agricultural insurance is not satisfactory. The developing level and pace of agriculture is far from the need. The paper analyses the developing situation, institutional background of agricultural insurance by looking at the statistics, demonstrates the urgence to develop agricultural insurance and agricultural insurance statistics of China.

  2. Current state, sources, and potential risk of heavy metals in sediments of Three Gorges Reservoir, China.

    Science.gov (United States)

    Bing, Haijian; Zhou, Jun; Wu, Yanhong; Wang, Xiaoxiao; Sun, Hongyang; Li, Rui

    2016-07-01

    Heavy metal (HM) contamination in sediments of Three Gorges Reservoir (TGR) is a particularly important issue for the safety of water quality due to the potential threats of metal toxicity to local and downstream human health. Surface sediments from riparian and submerged areas in the entire TGR mainstream were collected in 2014 to investigate the spatial distribution of HMs (Cd, Cu, Pb, and Zn), identify their possible sources, and assess their potential risk by multiple indices and metal fraction. Results showed that the concentrations of HMs in the sediments increased after the TGR operation, but were lower than those in other Chinese rivers of developed areas. The acid-soluble Cd accounted for more than 50% of total Cd in the sediments, whereas that of other HMs was very low. The Cd concentrations in the riparian sediments increased towards the dam; however, other metals in the riparian sediments and all HMs in the submerged sediments did not show any regular variation trend spatially. The stocks of HMs were significantly higher in the submerged sediments than in the riparian sediments. The high accumulation of HMs in the riparian sediments emerged between Fuling and Fengjie, and those in the submerged sediments existed in the near dam areas. Grain size and Fe/Mn oxides controlled the mobility and transfer of HMs in the sediments. Human activity in the catchment including industrial and agricultural production, shipping industry, mining, etc., increased inputs of HMs in the sediments, and altered their spatial distribution patterns. The sediments were moderately to highly contaminated by Cd, and slightly contaminated by other HMs. The results indicate the current priority of Cd contamination in the TGR, and will conduce to ecological protection in the TGR region. PMID:27131806

  3. Study on Current Levels of Physical Activity and Sedentary Behavior among Middle School Students in Beijing, China.

    Directory of Open Access Journals (Sweden)

    Jiali Duan

    Full Text Available This study aimed to determine current levels of physical activity and sedentary behavior in middle school students on the basis of grade, sex, student attitudes toward physical education, and residence location.In 2013, a cross-sectional study of 1793 students aged 12 to 15 years was conducted across eight middle schools in Beijing, China. Four schools were selected from an urban district and another four schools were from a suburban district. Physical activity and sedentary behavior data were collected using the commonly used school-based Chinese version of the China Health and Nutrition Survey.The mean age of sampled students was 13.3 ± 1.0 years; 51.5% were boys. Approximately 76.6% of students reported having three 45-minute physical education classes every week. A total of 35.6% students spent ≥ 1 h/day performing moderate to vigorous physical activity (MVPA during school, and 34.9% spent ≥ 1 h/day in MVPA outside school time. Approximately half (49.7% of the students engaged in reading, writing, or drawing for ≥ 2 h/day, and 42.9% reported screen time for ≥ 2 h/day. Although boys spent more time engaged in physical activity than girls did, they also spent more time exhibiting sedentary behavior. Each 10-unit increase in attitudes toward physical education was associated with an increased odds of 1.15 (95%CI: 1.09-1.20 for spending more than 1 h/day on MVPA. Students in suburban schools reported engaging in physical activity less when compared with those in urban schools.The majority of our students did not meet the current physical activity recommendations, and about half of the students spent excessive time engaging in sedentary behaviors. Findings from this study highlight a positive association between student attitudes toward physical education and physical activity. Studies are needed to further explore the role of student attitudes toward physical education in promoting physical activity among Chinese students.

  4. Evolution and magnitudes of candidate Planet Nine

    Science.gov (United States)

    Linder, Esther F.; Mordasini, Christoph

    2016-05-01

    Context. The recently renewed interest in a possible additional major body in the outer solar system prompted us to study the thermodynamic evolution of such an object. We assumed that it is a smaller version of Uranus and Neptune. Aims: We modeled the temporal evolution of the radius, temperature, intrinsic luminosity, and the blackbody spectrum of distant ice giant planets. The aim is also to provide estimates of the magnitudes in different bands to assess whether the object might be detectable. Methods: Simulations of the cooling and contraction were conducted for ice giants with masses of 5, 10, 20, and 50 M⊕ that are located at 280, 700, and 1120 AU from the Sun. The core composition, the fraction of H/He, the efficiency of energy transport, and the initial luminosity were varied. The atmospheric opacity was set to 1, 50, and 100 times solar metallicity. Results: We find for a nominal 10 M⊕ planet at 700 AU at the current age of the solar system an effective temperature of 47 K, much higher than the equilibrium temperature of about 10 K, a radius of 3.7 R⊕, and an intrinsic luminosity of 0.006 L♃. It has estimated apparent magnitudes of Johnson V, R, I, L, N, Q of 21.7, 21.4, 21.0, 20.1, 19.9, and 10.7, and WISE W1-W4 magnitudes of 20.1, 20.1, 18.6, and 10.2. The Q and W4 band and other observations longward of about 13 μm pick up the intrinsic flux. Conclusions: If candidate Planet 9 has a significant H/He layer and an efficient energy transport in the interior, then its luminosity is dominated by the intrinsic contribution, making it a self-luminous planet. At a likely position on its orbit near aphelion, we estimate for a mass of 5, 10, 20, and 50 M⊕ a V magnitude from the reflected light of 24.3, 23.7, 23.3, and 22.6 and a Q magnitude from the intrinsic radiation of 14.6, 11.7, 9.2, and 5.8. The latter would probably have been detected by past surveys.

  5. Control of antibiotic resistance in China must not be delayed: The current state of resistance and policy suggestions for the government, medical facilities, and patients.

    Science.gov (United States)

    Tang, Qi; Song, Peipei; Li, Jiajia; Kong, Fanlei; Sun, Long; Xu, Lingzhong

    2016-02-01

    Antibiotics are medicines used to prevent and treat bacterial infections. Antibiotic resistance occurs when bacteria change in response to the use of these medicines. Antibiotic resistance is rising to dangerously high levels in all parts of the world, leading to higher medical costs, prolonged hospital stays, and increased mortality. In the European Union alone, drug-resistant bacteria are estimated to cause 25,000 deaths and cost more than US$1.5 billion every year in healthcare expenses and productivity losses. The problems of antibiotic misuse and antibiotic resistance are quite serious in China. In 2015, results of a study by the State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences indicated that the total antibiotic usage in China in 2013 was approximately 162,000 tons, including human use (48%) and use in animals (52%). This amount accounted for about half of the antibiotic usage worldwide. The per-capita use of antibiotics in China is more than 5 times that in Europe and the United States. These data mean that China is one of the world's leading countries with serious problems in terms of antibiotic misuse and antibiotic resistance. The current article analyzes the current state and harms of antibiotic misuse and causes of antibiotic resistance in China. The Government needs to pay close attention to the issue of antibiotic resistance in China and formulate a strategy at the national level. Thus, the following suggestions are offered: i) The Chinese Government should implement policies that promote antibiotic research and development; ii) Medical facilities in China should create multidisciplinary teams (MDTs) and encourage early action by MDTs to control the spread of multi-drug-resistant bacteria (MDRB); iii) An intervention in the form of health education should target patients and accompanying family members (AFM) in China. In other words, antibiotic resistance is not a personal problem but an

  6. The November 14, 2001 west of Kunlun Mountain Pass earthquake: An earthquake with unsaturated surface wave magnitude

    Institute of Scientific and Technical Information of China (English)

    LIU Rui-feng; CHEN Yun-tai; REN Xiao; HOU Jian-min; ZOU Li-ye

    2005-01-01

    This paper presents an overview of the magnitude determination of the November 14, 2001 west of Kunlun Mountain Pass (KMP) earthquake at the juncture of Xinjiang and Qinghai, northwestern China. Comparisons are made among surface wave magnitudes determined by China National Digital Seismograph Network (CNDSN),National Earthquake Information Center (NEIC) of US Geological Survey (USGS) and moment magnitudes determined by different institutions in China and abroad. The result shows that different institutions yield different surface wave magnitudes, as different data and calculation formulae are used in magnitude determination. The magnitude of the earthquake in China's Rapid Earthquake Information Release was given as Ms=8.1; measurement given in the formally edited and published Observation Report of China Digital Seismograph Network is Ms=8.2;and magnitude determined by USGS/NEIC is Ms=8.0. Soon after the occurrence of the KMP earthquake, Harvard University (Harvard), USGS/NEIC, Earthquake Research Institute, Tokyo University (ERI), Center for Analysis and Prediction, China Earthquake Administration (APCEA) and Institute of Geophysics, China Earthquake Administration (IGCEA) gave the moment magnitude Mw as 7.8, 7.7, 7.7, 7.6 and 7.5, respectively, based on data from Global Seismograph Network (GSN), CNDSN and China Digital Seismograph Network (CDSN). These measurements, with an average value of Mw=7.7, are close to each other. As moment magnitude is a physical quantity measuring the absolute size of an earthquake and has obvious advantages over conventional magnitude scale, and is the preferred magnitude of the international seismological community. It is concluded that the KMP earthquake is an earthquake with unsaturated surface wave magnitude with moment magnitude Mw=7.7 and surface wave magnitude Ms=8.0.

  7. 男科学在中国:男科现状与近10年的发展%Andrology in China: current status and 10 years' progress

    Institute of Scientific and Technical Information of China (English)

    Kai Hong; Qing-Quan Xu; Yong-Ping Zhao; Yi-Qun Gu; Hui Jiang; Xiao-Feng Wang; Ji-Chuan Zhu

    2011-01-01

    Andrology has a long history in traditional Chinese medicine. There are records of male sexual health, male sexual dysfunction and male infertility from over thousands of years ago. Modern andrology in China had a late start, with the Chinese Andrology Association founded in 1995. Within last decade, andrology in China has grown rapidly. In this review article, we summarized the progress of andrology in last 10 years and outlined the current status of Chinese andrology with a special focus on progress in male erectile dysfunction, prostate diseases, male infertility and male hormonal contraception.

  8. Current State of Economic Returns from Education in China's Ethnic Regions and Explorations into Ways of Improvement

    Science.gov (United States)

    Lijun, Zhang; Fei, Wang

    2010-01-01

    Economic development and social progress in China's ethnic minority regions depend on improvements in population attributes brought about by education. Developing education in China's ethnic regions is a project of fundamental significance for realizing sustainable economic and social development in the ethnic regions. Improving the economic…

  9. Self-monitoring of blood glucose in type 2 diabetic patients in China:current status and influential factors

    Institute of Scientific and Technical Information of China (English)

    Yuan Li; Guo Xiaohui; Xiong Zhenzhen; Lou Qingqing; Shen Li; Zhao Fang; Sun Zilin

    2014-01-01

    Background Self-monitoring of blood glucose (SMBG) by individuals with type 2 diabetes (T2D) is crucial for long-term health,yet numerous cultural,economic and health factors can reduce SMBG.Most studies on SMBG adherence have come out of the US and Europe,and their relevance to Asia is unclear.The aims of the present study were to assess the current state of SMBG in China and analyze demographic and diabetes-related characteristics that may influence it.Methods In this multi-center,cross-sectional study,5 953 individuals with T2D from 50 medical centers in 29 provinces across China filled out a standardized questionnaire that requested information on demographic characteristics,education level,occupation,income,lifestyle risk factors,duration of diabetes,chronic complications,and frequency of SMBG.Respondents were also asked whether their glycosylated hemoglobin (HbA1c) had been checked in the past 6 months.The most recent values for fasting plasma glucose,2-hour postprandial blood glucose and HbA1c were recovered from medical records.Results Only 1 130 respondents (18.98%) performed SMBG with the recommended frequency,while 4 823 (81.02%) did not.In fact,nearly 2 105 (35.36%) reported never performing SMBG.In the subset of 3 661 individuals on insulin therapy,only 266 (7.27%) performed SMBG at least once a day,while 1 210 (33.05%) never performed it.In contrast,895 of 2 292 individuals (39.05%) on diet/exercise therapy or oral hypoglycemic therapy never performed it.Multivariate Logistic regression identified several factors associated with SMBG adherence:female gender,higher education level,higher income,longer T2D duration and education about SMBG.Conclusions SMBG adherence in our Chinese population with T2D was less frequent than that in developed countries.Several factors influence SMBG adherence:gender,education level,income,T2D duration,therapy regimen and exposure to education about SMBG.

  10. Advancing Implementation of Evidence-Based Public Health in China: An Assessment of the Current Situation and Suggestions for Developing Regions

    Directory of Open Access Journals (Sweden)

    Jianwei Shi

    2016-01-01

    Full Text Available Objective. Existing research shows a serious scarcity of EBPH practice in China and other developing regions; as an exploratory study, this study aimed to assess the current EBPH implementation status in Shanghai of China qualitatively. Methods. Using semistructured key informant interviews, we examined the status of and impediments to the lagging EBPH in China. Data were analyzed based on the Consolidated Framework for Implementation Research (CFIR. Results. Chinese public health practitioners knew more about evidence-based medicine but less about EBPH. The situation was worse in community healthcare centers. Participants perceived that evidence sources were limited and the quality of evidence was low. Concerning the inner setting factors, the structural characteristics, networks and communications, implementation climate, and leadership engagement were confronted with many problems. Among the outer setting factors, external government policies and incentives and low patient compliance were the key problems. Additionally, public health practitioners in Shanghai lacked sufficient awareness of EBPH. Furthermore, the current project-based EBPH lacks a systematic implementation system. Conclusions. Existing practical perspectives on EBPH indicate a lag in the advocacy of this new ideology in China. It would be advisable for healthcare institutions to take the initiative to explore feasible and multiple methods of EBPH promotion.

  11. Advancing Implementation of Evidence-Based Public Health in China: An Assessment of the Current Situation and Suggestions for Developing Regions

    Science.gov (United States)

    Shi, Jianwei; Tan, Duxun; Yu, Dehua; Lu, Yuan; Sun, Pengfei; Pan, Ying; Zhang, Hanzhi; Yang, Beilei

    2016-01-01

    Objective. Existing research shows a serious scarcity of EBPH practice in China and other developing regions; as an exploratory study, this study aimed to assess the current EBPH implementation status in Shanghai of China qualitatively. Methods. Using semistructured key informant interviews, we examined the status of and impediments to the lagging EBPH in China. Data were analyzed based on the Consolidated Framework for Implementation Research (CFIR). Results. Chinese public health practitioners knew more about evidence-based medicine but less about EBPH. The situation was worse in community healthcare centers. Participants perceived that evidence sources were limited and the quality of evidence was low. Concerning the inner setting factors, the structural characteristics, networks and communications, implementation climate, and leadership engagement were confronted with many problems. Among the outer setting factors, external government policies and incentives and low patient compliance were the key problems. Additionally, public health practitioners in Shanghai lacked sufficient awareness of EBPH. Furthermore, the current project-based EBPH lacks a systematic implementation system. Conclusions. Existing practical perspectives on EBPH indicate a lag in the advocacy of this new ideology in China. It would be advisable for healthcare institutions to take the initiative to explore feasible and multiple methods of EBPH promotion. PMID:27597958

  12. Advancing Implementation of Evidence-Based Public Health in China: An Assessment of the Current Situation and Suggestions for Developing Regions.

    Science.gov (United States)

    Shi, Jianwei; Jiang, Chenghua; Tan, Duxun; Yu, Dehua; Lu, Yuan; Sun, Pengfei; Pan, Ying; Zhang, Hanzhi; Wang, Zhaoxin; Yang, Beilei

    2016-01-01

    Objective. Existing research shows a serious scarcity of EBPH practice in China and other developing regions; as an exploratory study, this study aimed to assess the current EBPH implementation status in Shanghai of China qualitatively. Methods. Using semistructured key informant interviews, we examined the status of and impediments to the lagging EBPH in China. Data were analyzed based on the Consolidated Framework for Implementation Research (CFIR). Results. Chinese public health practitioners knew more about evidence-based medicine but less about EBPH. The situation was worse in community healthcare centers. Participants perceived that evidence sources were limited and the quality of evidence was low. Concerning the inner setting factors, the structural characteristics, networks and communications, implementation climate, and leadership engagement were confronted with many problems. Among the outer setting factors, external government policies and incentives and low patient compliance were the key problems. Additionally, public health practitioners in Shanghai lacked sufficient awareness of EBPH. Furthermore, the current project-based EBPH lacks a systematic implementation system. Conclusions. Existing practical perspectives on EBPH indicate a lag in the advocacy of this new ideology in China. It would be advisable for healthcare institutions to take the initiative to explore feasible and multiple methods of EBPH promotion. PMID:27597958

  13. 浅析我国食品安全现状%Current situation of food safety in China

    Institute of Scientific and Technical Information of China (English)

    张一萍

    2013-01-01

      At present, consumers for the quality of the food requirements and attention gradually increases, from the previously reported cases, China's food safety events have entered a multiple period, which closely relates to the current rapid development of the economy, social development level. In other words, the improvement of people's living standard and income rose to promote food production and processing industry developed rapidly, but the food safety supervision and consumer protection system is lagging behind, be amplified the contradiction between the two in the media and the public spotlight, which causes the public have great dissatisfaction and disappointment on food safety.%  目前,消费者对于食品质量的要求和关注逐渐提高,从过去报道的案例来看,我国食品安全事件确实进入一个多发期,这与当前飞速发展的经济、社会发展水平密不可分。换句话说,人民生活水平的提高和收入上升推动了食品生产和加工业迅速发展,但食品安全监管和消费者保护制度却相对滞后,两者之间的矛盾在媒体和社会大众的聚光灯下被放大,从而引起了社会大众对食品安全产生了巨大的不满和失望。

  14. Air Pollution Exposure and Physical Activity in China: Current Knowledge, Public Health Implications, and Future Research Needs.

    Science.gov (United States)

    Lü, Jiaojiao; Liang, Leichao; Feng, Yi; Li, Rena; Liu, Yu

    2015-11-01

    Deteriorating air quality in China has created global public health concerns in regard to health and health-related behaviors. Although emerging environmental regulations address ambient air pollution in China, the level of enforcement and long-term impact of these measures remain unknown. Exposure to air pollution has been shown to lead to multiple adverse health outcomes, including increased rates of heart disease and mortality. However, a lesser-known but increasingly significant concern is the relationship between air pollution and its effects on outdoor exercise. This is especially important in China, which has a culturally rooted lifestyle that encourages participation in outdoor physical activity. This article evaluates the intersection of air pollution and outdoor exercise and provides a discussion of issues related to its public health impact in China, where efforts to promote a healthy lifestyle may be adversely affected by the ambient air pollution that has accompanied rapid economic development and urbanization.

  15. Air Pollution Exposure and Physical Activity in China: Current Knowledge, Public Health Implications, and Future Research Needs

    Directory of Open Access Journals (Sweden)

    Jiaojiao Lü

    2015-11-01

    Full Text Available Deteriorating air quality in China has created global public health concerns in regard to health and health-related behaviors. Although emerging environmental regulations address ambient air pollution in China, the level of enforcement and long-term impact of these measures remain unknown. Exposure to air pollution has been shown to lead to multiple adverse health outcomes, including increased rates of heart disease and mortality. However, a lesser-known but increasingly significant concern is the relationship between air pollution and its effects on outdoor exercise. This is especially important in China, which has a culturally rooted lifestyle that encourages participation in outdoor physical activity. This article evaluates the intersection of air pollution and outdoor exercise and provides a discussion of issues related to its public health impact in China, where efforts to promote a healthy lifestyle may be adversely affected by the ambient air pollution that has accompanied rapid economic development and urbanization.

  16. Air Pollution Exposure and Physical Activity in China: Current Knowledge, Public Health Implications, and Future Research Needs

    OpenAIRE

    Jiaojiao Lü; Leichao Liang; Yi Feng; Rena Li; Yu Liu

    2015-01-01

    Deteriorating air quality in China has created global public health concerns in regard to health and health-related behaviors. Although emerging environmental regulations address ambient air pollution in China, the level of enforcement and long-term impact of these measures remain unknown. Exposure to air pollution has been shown to lead to multiple adverse health outcomes, including increased rates of heart disease and mortality. However, a lesser-known but increasingly significant concern i...

  17. Discussion on the Relationship between Different Earthquake Magnitude Scales and the Effect of Seismic Station Sites on Magnitude Estimation

    Institute of Scientific and Technical Information of China (English)

    Zhang Hongzhi; Diao Guiling; Zhao Mingchun; Wang Qincai; Zhang Xiao; Huang Yuan

    2008-01-01

    Based on the earthquake catalog reported by the Chinese digital seismic network in recent years, we select the earthquakes with both surface wave magnitude and local magnitude and fit them into a relationship between the two magnitudes. The systematic difference is found from the formula which has been used for 30 years. Because of a large dynamic range and wide frequency range of the current digital observation system, in addition to a larger number of stations and earthquakes being used compared to before, the relation obtained in this paper seems more reliable. Our calculation shows that there is no significant difference before and after magnitude conversion so we suggest the abandonment of magnitude conversion. The site response of a station consists of amplification at different frequencies. The amplification is equal to about 1 and changes little with frequency at stations located on basement rock, and it is greater than 1 at low frequency ranges and less than 1 at high frequency ranges at stations located on sediment layers. The difference between magnitudes from single station located on sediment layer and the average magnitude from the whole network increases from negative to positive with period. It seems that there is no fixed station correction factor and the station correction method does not work to improve the accuracy and magnitude estimates.

  18. The Correlation between Prorocentrum donghaiense Blooms and the Taiwan Warm Current in the East China Sea - Evidence for the “Pelagic Seed Bank” Hypothesis

    OpenAIRE

    Xinfeng Dai; Douding Lu; Weibing Guan; Ping Xia; Hongxia Wang; Piaoxia He; Dongsheng Zhang

    2013-01-01

    During the last two decades, large-scale high biomass algal blooms of the dinoflagellate Prorocentrum donghaiense Lu have occurred frequently in the East China Sea (ECS). The role of increasing nutrient concentrations in driving those blooms is well-established, but the source population that initiates them is poorly understood. We hypothesized that the front of Taiwan Warm Current (TWC) may serve as a 'seed bank' that initiates P. donghaiense blooms in the ECS, as the physiochemical conditio...

  19. Injection drug use and HIV/AIDS in China: Review of current situation, prevention and policy implications

    Directory of Open Access Journals (Sweden)

    Chen Huey T

    2006-02-01

    Full Text Available Abstract Illicit drug abuse and HIV/AIDS have increased rapidly in the past 10 to 20 years in China. This paper reviews drug abuse in China, the HIV/AIDS epidemic and its association with injection drug use (IDU, and Chinese policies on illicit drug abuse and prevention of HIV/AIDS based on published literature and unpublished official data. As a major drug trans-shipment country with source drugs from the "Golden Triangle" and "Gold Crescent" areas in Asia, China has also become an increasingly important drug consuming market. About half of China's 1.14 million documented drug users inject, and many share needles. IDU has contributed to 42% of cumulatively reported HIV/AIDS cases thus far. Drug trafficking is illegal in China and can lead to the death penalty. The public security departments adopt "zero tolerance" approach to drug use, which conflict with harm reduction policies of the public health departments. Past experience in China suggests that cracking down on drug smuggling and prohibiting drug use alone can not prevent or solve all illicit drug related problems in the era of globalization. In recent years, the central government has outlined a series of pragmatic policies to encourage harm reduction programs; meanwhile, some local governments have not fully mobilized to deal with drug abuse and HIV/AIDS problems seriously. Strengthening government leadership at both central and local levels; scaling up methadone substitution and needle exchange programs; making HIV voluntary counseling and testing available and affordable to both urban and rural drug users; and increasing utilization of outreach and nongovernmental organizations are offered as additional strategies to help cope with China's HIV and drug abuse problem.

  20. Nonlinear susceptibility magnitude imaging of magnetic nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Ficko, Bradley W., E-mail: Bradley.W.Ficko@Dartmouth.edu; Giacometti, Paolo; Diamond, Solomon G.

    2015-03-15

    This study demonstrates a method for improving the resolution of susceptibility magnitude imaging (SMI) using spatial information that arises from the nonlinear magnetization characteristics of magnetic nanoparticles (mNPs). In this proof-of-concept study of nonlinear SMI, a pair of drive coils and several permanent magnets generate applied magnetic fields and a coil is used as a magnetic field sensor. Sinusoidal alternating current (AC) in the drive coils results in linear mNP magnetization responses at primary frequencies, and nonlinear responses at harmonic frequencies and intermodulation frequencies. The spatial information content of the nonlinear responses is evaluated by reconstructing tomographic images with sequentially increasing voxel counts using the combined linear and nonlinear data. Using the linear data alone it is not possible to accurately reconstruct more than 2 voxels with a pair of drive coils and a single sensor. However, nonlinear SMI is found to accurately reconstruct 12 voxels (R{sup 2}=0.99, CNR=84.9) using the same physical configuration. Several time-multiplexing methods are then explored to determine if additional spatial information can be obtained by varying the amplitude, phase and frequency of the applied magnetic fields from the two drive coils. Asynchronous phase modulation, amplitude modulation, intermodulation phase modulation, and frequency modulation all resulted in accurate reconstruction of 6 voxels (R{sup 2}>0.9) indicating that time multiplexing is a valid approach to further increase the resolution of nonlinear SMI. The spatial information content of nonlinear mNP responses and the potential for resolution enhancement with time multiplexing demonstrate the concept and advantages of nonlinear SMI. - Highlights: • Development of a nonlinear susceptibility magnitude imaging model • Demonstration of nonlinear SMI with primary and harmonic frequencies • Demonstration of nonlinear SMI with primary and intermodulation

  1. 浅论我国现行财务报告的改进%Improvement of the Current Financial Reports in China

    Institute of Scientific and Technical Information of China (English)

    曲莉

    2015-01-01

    财务报告作为会计信息的一部分,与经济发展有着密切的联系。本文通过分析我国现行的财务报告,对现行财务报告提出了改进建议。%As the part of the accounting information, financial reports are closely related to the economic development. This paper analyzes the current financial reports in China and puts forward the improvement suggestion for the current financial reports.

  2. Intellectual property law and competition law in China - Analysis of the current framework and comparison with the EU approach

    Directory of Open Access Journals (Sweden)

    Yeung Nga Man

    2014-05-01

    Full Text Available In this paper Yeung Nga Man looks at the question of protection of intellectual property rights in the Chinese legal system with comparative reference to policy and practice in the European Union. What is the best way to stimulate competition but yet also protect innovation? Part I of the essay examines the present IPRs protection in China. In Part II, contrary to the myth that competition and IP law conflict with one another, the author argues that both foster innovation and development, and enhance consumer welfare. Part III discusses the competition law regime in China with a specific focus on AML and evaluation of the enforcement of the regime. Part IV outlines the European Union approach, which China might consider adopting. Part V discusses the Block Exemptions approach from the E.U. on horizontal agreements.

  3. Heterogeneous chemistry: a mechanism missing in current models to explain secondary inorganic aerosol formation during the January 2013 haze episode in North China

    Directory of Open Access Journals (Sweden)

    B. Zheng

    2014-06-01

    Full Text Available Severe regional haze pollution events occurred in eastern and central China in January 2013, which had adverse effects on the environment and public health. Extremely high levels of particulate matter with aerodynamic diameter of 2.5 μm or less (PM2.5 with dominant components of sulfate and nitrate are responsible for the haze pollution. Although heterogeneous chemistry is thought to play an important role in the production of sulfate and nitrate during haze episodes, few studies have comprehensively evaluated the effect of heterogeneous chemistry on haze formation in China by using the 3-D models due to of a lack of treatments for heterogeneous reactions in most climate and chemical transport models. In this work, the offline-coupled WRF-CMAQ model with newly added heterogeneous reactions is applied to East Asia to evaluate the impacts of heterogeneous chemistry and the meteorological anomaly during January 2013 on regional haze formation. The revised CMAQ with heterogeneous chemistry not only captures the magnitude and temporal variation of sulfate and nitrate, but also reproduces the enhancement of relative contribution of sulfate and nitrate to PM2.5 mass from clean days to polluted haze days. These results indicate the significant role of heterogeneous chemistry in regional haze formation and improve the understanding of the haze formation mechanisms during the January 2013 episode.

  4. On the frequency-apparent magnitude relations

    Energy Technology Data Exchange (ETDEWEB)

    Tinti, S.; Rimondi, R.; Mulargia, F.

    1987-08-01

    The ''apparent magnitude'' of an earthquake is the observed magnitude value and differs from the true magnitude in virtue of the experimental error. If the error is assumed to be normally distributed with standard deviation sigma, the probability distributions of the two magnitudes may be proven to be in a rather simple relationship, at least for the cases of seismological interest. In fact, there is a significant interval of magnitudes where the suggested approximation in the text holds. The main consequence is that, independently of the assumed basic distribution of the true magnitude, the exceedence frequencies appearing from the observed data are larger than the true ones and therefore their values should be corrected by an appropriate reducing factor.

  5. 我国纺织环保上浆现状及发展趋势%Current Status and Developing Trend of Environmental-friendly Sizing Technologies in China

    Institute of Scientific and Technical Information of China (English)

    王耀

    2014-01-01

    The development of textile sizing technologies should meet the requirements of low-carbon, eco-friendly, recycling economy and the developing trend of textile industry. This paper describes the current status, characteristics and existing problems of environmental-friendly sizing technologies in China and puts forward some ideas for promoting the development of environmental-friendly sizing technologies in China.%纺织上浆工艺的发展要符合低碳、绿色的循环经济发展要求及纺织工业发展趋势。文章主要介绍了目前我国纺织环保上浆的现状、特点及存在的问题,为加快推进我国纺织环保上浆工艺的发展提出了思路。

  6. Evolution and Magnitudes of Candidate Planet Nine

    CERN Document Server

    Linder, Esther F

    2016-01-01

    Context. Given the recently renewed interest in a possible additional major body in the outer Solar System, the thermodynamic evolution of such an object was studied, assuming that it is a smaller version of Uranus and Neptune. Aims. We have modeled the temporal evolution of the radius, temperature, intrinsic luminosity, and the black body spectrum of distant ice giants. The aim is to provide also estimates of the magnitudes in different bands to assess the object's detectability. Methods. Simulations of the cooling and contraction were conducted for ice giants with masses of 5, 10, 20, and 50 Mearth containing 10, 14, 21, and 37 % H/He in mass that are located at 280, 700, and 1120 AU from the Sun. The core composition was varied from purely rocky to purely icy as well as 50% rock and 50% ice. The atmospheric opacity was set to 1, 50, and 100 times solar metallicity. Results. We find for the nominal 10 Mearth planet at 700 AU at the current age of the Solar System an effective temperature of 47 K, much more ...

  7. Current levels and composition profiles of PBDEs and alternative flame retardants in surface sediments from the Pearl River Delta, southern China: Comparison with historical data

    International Nuclear Information System (INIS)

    Polybrominated diphenyl ethers (PBDEs) and alternative flame retardants were measured in surface sediments collected during 2009–2010 from the Pearl River Delta, southern China (a large manufacturing base for electronics/electrical products), to evaluate the influence of China's RoHS directive (adopted in 2006) on their environmental occurrence. The concentrations in sediments from different water systems ranged from 3.67 to 2520 ng/g (average of 17.1–588 ng/g) for PBDEs and from 0.22 to 5270 ng/g (average of 11.3–454 ng/g) for the alternative retardants. Although the PBDE levels have decreased significantly compared with those in sediments collected in 2002 in this region, the levels of alternative decabromodiphenyl ethane (DBDPE) have exceeded those of BDE209 (two predominant halogenated flame retardants (HFRs) in China) in the majority of sediments. This finding suggests a different contaminant pattern of HFRs in current sediments due to the replacement of the deca-BDE mixture with DBDPE in this region. In addition, sediment concentrations of discontinued PBDEs in the rural area are clearly elevated due to e-waste dismantling. The congener profiles of PBDEs in the current sediments (with more abundant lower-brominated congeners) differed substantially from those in 2002 and from the technical products, suggesting that biological or photolytic debromination of PBDEs may have occurred in the environment. - Highlights: ► PBDE levels in sediments have decreased substantially since China's RoHS directive. ► Contamination of novel DBDPE has exceeded that of deca-BDE in the PRD sediments. ► The congener profiles of PBDEs in the sediments have changed significantly. ► Significant biological or photolytic degradation of PBDEs may occur in the environment

  8. The Role of Executive Functions in Numerical Magnitude Skills

    Science.gov (United States)

    Kolkman, Meijke E.; Hoijtink, Herbert J. A.; Kroesbergen, Evelyn H.; Leseman, Paul P. M.

    2013-01-01

    Executive functions (EF) are closely related to math performance. Little is known, however, about the role of EF in numerical magnitude skills (NS), although these skills are widely acknowledged to be important precursors of math learning. The current study focuses on the different roles of updating, shifting, and inhibition in NS. EF and NS were…

  9. Discounting Behaviour and the Magnitude Effect

    DEFF Research Database (Denmark)

    Andersen, Steffen; Harrison, Glenn W.; Lau, Morten Igel;

    2013-01-01

    We evaluate the claim that individuals exhibit a magnitude effect in their discounting behaviour, where higher discount rates are inferred from choices made with lower principals, all else being equal. If the magnitude effect is quantitatively significant, it is not appropriate to use one discount...

  10. Reward Magnitude Effects on Temporal Discrimination

    Science.gov (United States)

    Galtress, Tiffany; Kirkpatrick, Kimberly

    2010-01-01

    Changes in reward magnitude or value have been reported to produce effects on timing behavior, which have been attributed to changes in the speed of an internal pacemaker in some instances and to attentional factors in other cases. The present experiments therefore aimed to clarify the effects of reward magnitude on timing processes. In Experiment…

  11. Local magnitudes of small contained explosions.

    Energy Technology Data Exchange (ETDEWEB)

    Chael, Eric Paul

    2009-12-01

    The relationship between explosive yield and seismic magnitude has been extensively studied for underground nuclear tests larger than about 1 kt. For monitoring smaller tests over local ranges (within 200 km), we need to know whether the available formulas can be extrapolated to much lower yields. Here, we review published information on amplitude decay with distance, and on the seismic magnitudes of industrial blasts and refraction explosions in the western U. S. Next we measure the magnitudes of some similar shots in the northeast. We find that local magnitudes ML of small, contained explosions are reasonably consistent with the magnitude-yield formulas developed for nuclear tests. These results are useful for estimating the detection performance of proposed local seismic networks.

  12. Outline of Classical and Current Approaches to the Research of Morphology of Selected Mineral Crystals in China (CD-ROM)

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The research on morphology of mineral crystals in China includes classical goniometry of 100 minerals such as hsianghualite, orthobrannerite, jamesonite and bertrandite and surface microtopography of 20 minerals such as wolframite and diamond, among which 5 new minerals and 34 uranium minerals were discovered and measured by Chinese mineralogists. These have enriched mineralogy and crystal morphology and strengthened the study of information of morphological genesis.

  13. The Construction of Emergency Logistics System in China---Based on the Ludian 6.5 Magnitude Earthquake in Yunnan Province%浅谈中国灾害应急物流体系建设--以云南省鲁甸县6.5级地震为例

    Institute of Scientific and Technical Information of China (English)

    赵泽旭; 鲁晓丽; 白杨

    2014-01-01

    在云南省鲁甸县6.5级地震应急中,中国政府及时采取了许多紧急方案来进行救灾,但是由于应急管理体系建设不完善、应急物流管理信息平台的缺乏,应急物资的运输与配送的协调性和计划性的缺乏,在营救过程当中,还是暴露出我国一些应急物流能力的不足。通过对我国应急物流的反思,结合国外应急管理和应急物流的先进经验,系统分析我国应急物流存在的问题,并从应急物流设备、交通网络、信息技术以及应急中的回收物流等方面对中国的应急物流提出建设性的意见。%The Chinese government has taken a number of emergency measures to respond to the 6.5-magnitude earthquake in Ludian country of Yunnan province. However, as the emergency management system is not perfect, lack of emergency logistics management information platform, and is short of the coordination of the transport and distribution of emergency supplies, the Chi-nese government still expose some shortcomings of emergency logistics capability. Combined with the foreign advanced experiences in emergency logistics management, this article systematically analysis the problems of emergency logistics in China; and put for-ward some suggestions of developing emergency logistics, like improving the logistics equipment, transportation network, information technology, and the reverse logistics and so on.

  14. 华东电网短路电流计算标准研究%Short-Circuit Current Calculation Standard for East China Power Grid

    Institute of Scientific and Technical Information of China (English)

    冯煜尧; 祝瑞金; 庄侃沁; 李建华

    2012-01-01

    Nowadays five IEC 60909-based calculation methods are commonly used for domestic short-circuit current calculation.On the basis of small system calculation examples,and artificial short circuit field test data for East China Power Grid,this paper theoretically analyzes the validity of the five short-circuit current calculation methods and the calculation influencing factors.Finally,short-circuit current calculation standard is proposed applicable for power grid of no less than 220 kV in East China.%介绍了目前国内短路电流计算工程应用主要根据IEC 60909形成的5种常用的计算方法,从理论分析的角度,结合小系统算例、华东实际电网以及现场人工短路试验实测数据,分析了5种短路计算方法的合理性以及影响短路电流计算的因素,并提出了适合华东220 kV及以上电网短路电流计算的标准。

  15. Current and Future Status of Wood Structure in China (Part I)%中国木结构产业的现状及发展(一)

    Institute of Scientific and Technical Information of China (English)

    周海宾

    2012-01-01

    The author reviews the wood construction history within China, analyzes some major barriers for promoting wood frame structures,and makes forecasts for development prospects. This initial serial of series report emphasizes the current status and macroscopic development characteristics of the Chinese wood industry. In the author's opinion, there is a huge potential demand for wood frame structures in China resulting in a rapidly developing period for the China's wood construction industry.%回顾我国木结构的发展历程,总结我国木结构产业的现状,分析现存问题并展望未来的发展方向.本篇为连载的第一部分,重点根据我国木结构产业区域发展特点,将我国木结构产业划分为8个区域,分析各区域的产业规模、原料来源、产品类型特征;总结木结构产业的宏观发展特征,指出我国木结构产业正处于发展速度快、市场需求潜力大的时期,存在主要使用进口原材料的问题.

  16. Analysis of the current situation and problems of China' cultural exports%我国文化出口的现状及问题分析

    Institute of Scientific and Technical Information of China (English)

    王海远

    2012-01-01

    现阶段,我国文化出口的整体状况并不令人乐观。尽管从统计数据看,我国的文化产品和服务出1:7连年增长,获取的经济效益也不断增加,但这些不断攀升的数据并不能掩盖我国文化出口整体实力较弱的现实。产品和服务缺乏国际竞争力、缺少国际市场经验、创新不足、以内容为核心的文化产品占比过小等等都是制约文化出口的因素。%The current overall situation of China's cultural exports is not encouraging. Although the statistics suggest Chinese cultural product and service exports grow year after year, and the economic benefits are also grow- ing, but these rising data can not cover up the reality of the general weaker situation of cultural exports in China. The lack of international competitiveness of products and services, of experience in international markets, and of in- novation, as well as the too small proportion of content-based cultural products are the constraining factors of cuhur- al exoorts in China.

  17. Current Development Analysis of Control Valve Industry in China%我国控制阀行业发展状况分析

    Institute of Scientific and Technical Information of China (English)

    王炯; 武丽英

    2012-01-01

    阐述我国控制阀行业的现状和存在问题,分析了市场状况、竞争格局和应用市场的情况,指出了行业未来的发展趋势。%This article describes the current development status and existing problems of control valve industry in China. A detailed analysis is also given on market situation, competition status and implementation in industry, as well as future development trend of this industry.

  18. Current Situation and Future Trends of Meat Consumption in China%我国肉类消费现状与未来发展趋势

    Institute of Scientific and Technical Information of China (English)

    陈琼; 王济民

    2013-01-01

    Through the comprehensive analysis on the changes of urban and rural resident's meat consumption quantity and structure,taking into account the current situation of China's economic development,the future trends of our country's meat consumption were analyzed and prospected.%本文通过对我国城乡居民肉类消费水平和消费结构变动特征的全面分析,综合考虑当前经济发展形势,对我国未来肉类消费趋势进行了分析和展望.

  19. 当代中国体育文化输出状况和对策%Current Condition and Strategy of China Sports Culture Export in Modern Times

    Institute of Scientific and Technical Information of China (English)

    张珊珊

    2011-01-01

    In recent years, the western sports culture import brought the huge challenge for China, the Chinese sports culture has been under the serious cultural impact, this paper,from the concept, current condition and im- portance of sports culture import, analyzes the historical opportune of China culture sports meet in the new century of Beijing Olympics, puts forward that we should export China sports culture through large - scale sports match, sports exchange, sports star, brand, books and video products towards to the world, and finally points out the long -term coexistence between China and western sports culture on global sports culture development.%近年来,西方体育文化的输入给中国体育文化带来了巨大的挑战,中国体育文化受到了严重的冲击。从体育文化输出的概念、现状、输出的重要性着手,剖析了中国体育文化恰遇新世纪北京奥运会等难得的历史机遇,提出了通过大型体育赛事、体育交流、走出国门的体育明星、体育品牌、书籍、影像产品、网络等途径输出中国体育文化,最后提出了中西方体育文化将长期共存的全球体育文化发展趋势。

  20. Nonlinear susceptibility magnitude imaging of magnetic nanoparticles

    Science.gov (United States)

    Ficko, Bradley W.; Giacometti, Paolo; Diamond, Solomon G.

    2015-03-01

    This study demonstrates a method for improving the resolution of susceptibility magnitude imaging (SMI) using spatial information that arises from the nonlinear magnetization characteristics of magnetic nanoparticles (mNPs). In this proof-of-concept study of nonlinear SMI, a pair of drive coils and several permanent magnets generate applied magnetic fields and a coil is used as a magnetic field sensor. Sinusoidal alternating current (AC) in the drive coils results in linear mNP magnetization responses at primary frequencies, and nonlinear responses at harmonic frequencies and intermodulation frequencies. The spatial information content of the nonlinear responses is evaluated by reconstructing tomographic images with sequentially increasing voxel counts using the combined linear and nonlinear data. Using the linear data alone it is not possible to accurately reconstruct more than 2 voxels with a pair of drive coils and a single sensor. However, nonlinear SMI is found to accurately reconstruct 12 voxels (R2=0.99, CNR=84.9) using the same physical configuration. Several time-multiplexing methods are then explored to determine if additional spatial information can be obtained by varying the amplitude, phase and frequency of the applied magnetic fields from the two drive coils. Asynchronous phase modulation, amplitude modulation, intermodulation phase modulation, and frequency modulation all resulted in accurate reconstruction of 6 voxels (R2>0.9) indicating that time multiplexing is a valid approach to further increase the resolution of nonlinear SMI. The spatial information content of nonlinear mNP responses and the potential for resolution enhancement with time multiplexing demonstrate the concept and advantages of nonlinear SMI.

  1. Executive function and magnitude skills in preschool children.

    Science.gov (United States)

    Prager, Emily O; Sera, Maria D; Carlson, Stephanie M

    2016-07-01

    Executive function (EF) has been highlighted as a potentially important factor for mathematical understanding. The relation has been well established in school-aged children but has been less explored at younger ages. The current study investigated the relation between EF and mathematics in preschool-aged children. Participants were 142 typically developing 3- and 4-year-olds. Controlling for verbal ability, a significant positive correlation was found between EF and general math abilities in this age group. Importantly, we further examined this relation causally by varying the EF load on a magnitude comparison task. Results suggested a developmental pattern where 3-year-olds' performance on the magnitude comparison task was worst when EF was taxed the most. Conversely, 4-year-olds performed well on the magnitude task despite varying EF demands, suggesting that EF might play a critical role in the development of math concepts. PMID:27082019

  2. Suckers (Fish, Catostomidae) from the Eocene of China ac-count for the family's current disjunct distributions

    Institute of Scientific and Technical Information of China (English)

    CHANG; Mee-mann

    2001-01-01

    [1]Liu, T. S., Loess and the Environment, Beijing: China Ocean Press, 1985, 1-251.[2]Chen, L. X., Zhu, Q. G., Luo, H. B. et al., East Asian Monsoon, Beijing: China Meteorology Press, 1991, 28-61.[3]An, Z. S., Liu, T. S., Lu, Y. C. et al., The long-term palaeomonsoon variation recorded by the loess-palaeosol sequence in central China, Quaternary International, 1990, (7/8): 91-95.[4]Guo, Z. T., Liu, T. S., Fedoroff, N. et al., Shift of the monsoon intensity on the Loess Plateau at ca. 0.85 MaBP, Chinese Science Bulletin, 1993, 38(2): 586-591.[5]Chen, J., An, Z. S., Wang, Y. J. et al., Distributions of Rb and Sr in the Luochuan loess-paleosol sequence of China during the last 800 ka: Implications for paleomonsoon variations, Science in China, Ser. D, 1999, 42(3): 225-232.[6]Chen, J., Wang, Y. J., Ji, J. F. et al., Rb/Sr variations and its climatic stratigraphical significance of a loess-paleosol profile from Luochuan, Shaanxi Province, Quaternary Sciences (in Chinese), 1999, 19(4): 350-356.[7]Guo, Z. T.,Liu, T. S., Fedoroff, N. et al., Climate extremes in loess of China coupled with the strength of deep-water for-mation in the North Atlantic, Global and Planetary Change, 1998, 18: 113-128.[8]Guo, Z. T., Liu, T. S., An, Z. S., Paleosols of the last 0.15 Ma in the Weinan loess section and their paleoclimate signifi-cance, Quaternary Sciences (in Chinese), 1994, 14(3): 256-269.[9]Guo, Z, T,, Fedoroff, N., Liu, T. S., Micromorphology of the loess-paleosol sequence of the last 130 ka in China and pa-leoclimatic event, Science in China (in Chinese), Ser. D, 1996, 26(3): 392-398.[10]Guo, Z., Liu, T., Guiot, J., et al., High frequency pulses of East Asian monsoon climate in the last two glaciations: Link with the North Atlantic, Climate Dynamics, 1996, 12: 701-709.[11]Guo, Z. T., Peng, S. Z., Wei, L. Y. et al., Weathering signals of Millennial-Scale oscillations of the East Asian Summer monsoon over the last 220 ka, Chinese Science

  3. Application of adjoint assimilation technique in simulating tides and tidal currents of the Bohai Sea, the Yellow Sea and the East China Sea

    Institute of Scientific and Technical Information of China (English)

    Cheng Yongcun; Lu Xianqing; Liu Yuguang; Xu Qing

    2007-01-01

    Considering the interaction of different tidal waves, an adjoint numerical model is developed to simulate M2, S2, K1 and O1 tidal waves in the Bohai Sea, the Yellow Sea and the East China Sea(B-Y-E) simultaneously. Compared with previous researches, by using the adjoint assimilation technique to inverse open boundary conditions and bottom friction coefficients based on altimetric data from TOPEX/Poseidon (T/P)and tidal gauges data, the precision of the numerical simulation is significantly improved. Selecting 14 days of simulated results after t11e initial warming run to conduct harmonic analysis, the results can show the characteristics of M2, S2, K1 and O1 tidal wave systems perfectly in B-Y-E. Compared with 9 current stations, the calculated harmonic constants of tidal currents for M2 and K1 are in good agreement With the observed ones.

  4. Suckers (Fish, Catostomidae) from the Eocene of China ac-count for the family's current disjunct distributions

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Unequivocal Eocene suckers from China are for the first time reported here. This discovery demonstrates that catostomids of the Eocene Epoch (some 55-35 Ma ago) are scattered widely on mainland Asia as well as western North America. The present day disjunct distribution pattern of catostomids, with 68 extant species widespread in North America and the northern part of Middle America and only two in the restricted areas of Asia, is the result of their post-Eocene decline in Asia due to the competitive pressure from cyprinids, their Late Cenozoic radiation in North America, and the vicariant and dispersal events triggered by the changed biogeographic landscape. All of these prove to be a historical product of the geological, biological, and climatic changes throughout the Cenozoic.

  5. Analysis of characteristics and mechanism of current system on the west coast of Guangdong of China in summer

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    On the basis of data of drifting bottles'tracks and the current measured in anchored stations, as well as temperature and salinity observed in cruise investigations and coastal stations, ADCP current data and AVHRR surface sea temperature (SST) data on the western coast of Guangdong, synthetic results of analysis showed that the coastal currents in the west of the mouth of the Zhujiang River were mainly westward in summer, which constituted the north branch of cyclonic gyre in the east of the Qiongzhou Straits. Part of its water flowed westward into the Beibu Gulf through the Qiongzhou Straits. The coastal current pattern was not identical with the traditional current system which flowed westward in the Qiongzhou Straits in winter and eastward in summer. The summertime's coastal current was always westward, maybe temporarily turning northeast only when the southwest wind was strong. The important characteristics of coastal current on the western coast of Guangdong, in the Qiongzhou Straits and in the north of the Beibu Gulfwere analyzed and their mechanisms also were explained.

  6. Argument on the magnitude-frequencyrelation

    Institute of Scientific and Technical Information of China (English)

    陈时军; 王丽凤; 马丽; 张红军

    2002-01-01

    The complexity of seismicity and the relation of magnitude and frequency are discussed in this paper on the basis of nonlinear dynamics and multifractal theory. We argue that seismic active systems normally have multifractal characteristics, either for the spatial-temporal distribution or the intensity distribution of events. In the view of multifractal theory the nonlinear characteristics of the magnitude-frequency relation are discussed and the formulation is revised. Also, one example of the variance of bq estimated based on the recent New Zealand catalogue is enumerated.

  7. Absolute-Magnitude Distributions of Supernovae

    CERN Document Server

    Richardson, Dean; Wright, John; Maddox, Larry

    2014-01-01

    The absolute-magnitude distributions of seven supernova types are presented. The data used here were primarily taken from the Asiago Supernova Catalogue, but were supplemented with additional data. We accounted for both foreground and host-galaxy extinction. A bootstrap method is used to correct the samples for Malmquist bias. Separately, we generate volume-limited samples, restricted to events within 100 Mpc. We find that the superluminous events (M_B -15) make up about 3%. The normal Ia distribution was the brightest with a mean absolute blue magnitude of -19.25. The IIP distribution was the dimmest at -16.75.

  8. 我国肉类食品安全风险现状与对策%Current Status and Countermeasures of Meat Safety and Risk in China

    Institute of Scientific and Technical Information of China (English)

    李丹; 王守伟; 臧明伍; 张凯华; 张哲奇; 赵金杨

    2015-01-01

    当前我国肉类食品安全整体趋稳向好,但影响肉类食品安全的深层原因仍然存在,食品安全形势依然严峻。本文分析了我国肉类食品从养殖、加工到消费和流通的整个产业链中存在的食品安全问题和风险,以及对比分析了国外肉类食品存在的食品安全问题和风险,剖析了我国肉类食品安全的制约因素,并提出提高我国肉类食品安全的对策建议,期望通过加强风险监测、构建风险预警体系以及开展经济利益驱动型食品安全风险专项整活动,提高我国肉类食品安全水平。%Currently, the overall situation of meat safety in China is getting better but still grim, for the underlying factors causing meat food safety risks still exist. This paper analyzes the food safety problems and risks along the whole industry chain of meat products in China, including breeding, processing, consumption and circulation, and provides a comparative analysis with those in other countries, outlines the factors constraining meat safety in China, and proposes four suggestions on improving the safety of Chinese meat products: strengthening risk monitoring, constructing early warning system, promoting meat safety risk communication and conducting food safety special rectification activities of meat adulteration driven by economic interests.

  9. Current situation of nursing education internationalization in Europe and China%欧洲及我国护理教育国际化发展现况

    Institute of Scientific and Technical Information of China (English)

    刘霖; 姜安丽

    2014-01-01

    为应对政治、经济、教育的全球化发展,欧洲推行一体化高等教育发展政策。本文综述了在该政策的影响下,欧洲多国及护理组织所开展的护理教育一体化发展策略,并对我国高等护理教育国际化发展现况作一阐述,思考国外高等护理教育国际化发展策略对我国的启示。%In the context of globalization of politics, economy and education, European countries adopted the policies of developing integrated higher education. This article reviewed the strategies of nursing education internationalization in European countries and nursing organizations;and described the current situation of higher nursing education internationalization in China;and then discussed the enlightenment of the strategies of higher nursing education internationalization in foreign countries to the nursing education in China.

  10. Historical revision of the exposure magnitude and the dosimetric magnitudes used in radiological protection; Revision historica de la magnitud exposicion y las magnitudes dosimetricas empleadas en proteccion radiologica

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez J, F. [UNAM, Facultad de Ciencias, Ciudad Universitaria, 04510 Mexico D. F. (Mexico); Alvarez R, J. T., E-mail: trinidad.alvarez@inin.gob.mx [ININ, Departamento de Metrologia de Radiaciones Ionizantes, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2014-10-15

    In this work a historical revision of the exposure magnitude development and their roentgen unit (1905 - 2011) is made, noting that it had their origin in the electric methods for the detection of the ionizing radiation in the period of 1895 at 1937. However, the ionization is not who better characterizes the physical, chemical and biological effects of the ionizing radiations, but is the energy deposited by this radiation in the interest bodies, which led historically to the development of dosimetric magnitudes in energy terms like they are: the absorbed dose D (1950), the kerma K (1958) and the equivalent dose H (1962). These dosimetric magnitudes culminated with the definition of the effective equivalent dose or effective dose which is not measurable and should be considered with the operative magnitudes ICRU: H environmental equivalent dose and/or H directional equivalent dose, which can be determined by means of a conversion coefficient that is applied to the exposure, kerma in air, fluence, etc. (Author)

  11. Setting up charging electric stations within residential communities in current China: Gaming of government agencies and property management companies

    International Nuclear Information System (INIS)

    The difficulty of charging electric vehicles (EVs) is now hindering their further development. Governments generally choose to build stations for home charging (including piles) within residential communities. Given the conflict of interest between various government agencies and property management companies, constructing a charging station within residential communities would result in welfare loss for the property management companies and therefore lead to the principal–agent problem. This paper constructs a two-period imperfect information game theory model to study the moral hazard involved in this issue and government agencies' optimal choice. In the analytic solution of the model, we find that the optimal choice for a farsighted government agency is to constantly improve the incentive mechanism and introduce charging stations only when the conflict of interest is eliminated. Any benefits derived from government regulations by force would prove short-lived. The government should focus on long-term returns in the development of EVs, and its optimal mechanism should be designed to mitigate the principal–agent problem of property management companies, thereby accelerate the progress of EV charging infrastructure and improve overall social welfare. - Highlights: • The charging of electric vehicles (EVs) is hindering their use. • A game theory model is used for analysis of EV charging station construction. • Charging stations are in residential communities in China. • Government agencies are constantly improving incentive mechanisms

  12. Development of online instructional resources for Earth system science education: An example of current practice from China

    Science.gov (United States)

    Dong, Shaochun; Xu, Shijin; Lu, Xiancai

    2009-06-01

    Educators around the world are striving to make science more accessible and relevant to students. Online instructional resources have become an integral component of tertiary science education and will continue to grow in influence and importance over the coming decades. A case study in the iterative improvement of the online instructional resources provided for first-year undergraduates taking " Introductory Earth System Science" at Nanjing University in China is presented in this paper. Online instructional resources are used to conduct a student-centered learning model in the domain of Earth system science, resulting in a sustainable online instructional framework for students and instructors. The purpose of our practice is to make Earth system science education more accessible and exciting to students, changing instruction from a largely textbook-based teacher-centered approach to a more interactive and student-centered approach, and promoting the integration of knowledge and development of deep understanding by students. Evaluation on learning performance and learning satisfaction is conducted to identify helpful components and perception based on students' learning activities. The feedbacks indicate that the use of online instructional resources has positive impacts on mitigating Earth system science education challenges, and has the potential to promote deep learning.

  13. Local magnitude, duration magnitude and seismic moment of Dahshour 1992 earthquakes

    OpenAIRE

    M. F. Abdelwahed; E. M. Abdelrahman; H. M. Hussein; M. M. Dessokey

    2000-01-01

    Local magnitudes ML have been calculated for 56 earthquakes of the Dahshour 1992 sequence using simulated records of the KEG broadband station and the estimated calibration function of the Dahshour area. These were compared with their corresponding values of duration magnitudes obtained from the analog short period seismograms of the HLW station. The local magnitudes M L and the duration magnitudes M D for this region imply a linear relation as follows: M L = 1.2988 (± 0.04) M D – 0.9032 (± 0...

  14. Neural representations of magnitude for natural and rational numbers.

    Science.gov (United States)

    DeWolf, Melissa; Chiang, Jeffrey N; Bassok, Miriam; Holyoak, Keith J; Monti, Martin M

    2016-11-01

    Humans have developed multiple symbolic representations for numbers, including natural numbers (positive integers) as well as rational numbers (both fractions and decimals). Despite a considerable body of behavioral and neuroimaging research, it is currently unknown whether different notations map onto a single, fully abstract, magnitude code, or whether separate representations exist for specific number types (e.g., natural versus rational) or number representations (e.g., base-10 versus fractions). We address this question by comparing brain metabolic response during a magnitude comparison task involving (on different trials) integers, decimals, and fractions. Univariate and multivariate analyses revealed that the strength and pattern of activation for fractions differed systematically, within the intraparietal sulcus, from that of both decimals and integers, while the latter two number representations appeared virtually indistinguishable. These results demonstrate that the two major notations formats for rational numbers, fractions and decimals, evoke distinct neural representations of magnitude, with decimals representations being more closely linked to those of integers than to those of magnitude-equivalent fractions. Our findings thus suggest that number representation (base-10 versus fractions) is an important organizational principle for the neural substrate underlying mathematical cognition.

  15. Current status and prediction of major atmospheric emissions from coal-fired power plants in Shandong Province, China

    Science.gov (United States)

    Xiong, Tianqi; Jiang, Wei; Gao, Weidong

    2016-01-01

    Shandong is considered to be the top provincial emitter of air pollutants in China due to its large consumption of coal in the power sector and its dense distribution of coal-fired plants. To explore the atmospheric emissions of the coal-fired power sector in Shandong, an updated emission inventory of coal-fired power plants for the year 2012 in Shandong was developed. The inventory is based on the following parameters: coal quality, unit capacity and unit starting year, plant location, boiler type and control technologies. The total SO2, NOx, fine particulate matter (PM2.5) and mercury (Hg) emissions are estimated at 705.93 kt, 754.30 kt, 63.99 kt and 10.19 kt, respectively. Larger units have cleaner emissions than smaller ones. The coal-fired units (≥300 MW) are estimated to account for 35.87% of SO2, 43.24% of NOx, 47.74% of PM2.5 and 49.83% of Hg emissions, which is attributed primarily to the improved penetration of desulfurization, LNBs, denitration and dust-removing devices in larger units. The major regional contributors are southwestern cities, such as Jining, Liaocheng, Zibo and Linyi, and eastern cities, such as Yantai and Qindao. Under the high-efficiency control technology (HECT) scenario analysis, emission reductions of approximately 58.61% SO2, 80.63% NOx, 34.20% PM2.5 and 50.08% Hg could be achieved by 2030 compared with a 2012 baseline. This inventory demonstrates why it is important for policymakers and researchers to assess control measure effectiveness and to supply necessary input for regional policymaking and the management of the coal-fired power sector in Shandong.

  16. Current status of antiplatelet treatment before and after ischemic stroke, and an analysis of factors associated with antiplatelet treatment, in the Qingdao area of China

    Institute of Scientific and Technical Information of China (English)

    WANG Xin; WANG Ping; YU Tan-fang; ZHANG Min; DU Zheng-qiang; XING Cheng-ming

    2011-01-01

    Background Stroke is the most common neurological disease in China,and antiplatelet treatment is important for primary and secondary prevention.This study aimed to describe the current status of antiplatelet treatment before,immediately after,and 1 month after ischemic stroke in the Qingdao area of China,and to determine the factors and potential barriers influencing use.Methods A total of 1114 patients with acute ischemic stroke were enrolled from 11 hospitals in the Qingdao area.Patient demographic data,clinical data,and treatment before and after the stroke were recorded.Univariate analysis (two sample t-test or Mann-Whitney U test,and chi-square test) and multivariate Logistic regression analysis were used to determine the frequency of antiplatelet treatment,and factors associated with treatment,at three time points:before the stroke,in hospital after the stroke,and at 1-month follow-up.Results The frequency of antiplatelet treatment was 6.4% before the stroke,91.5% in hospital,and 77.2% at 1 month.Aspirin pretreatment was independently associated with higher education level,higher income level,history of hyperlipidemia,and history of cerebral vascular disease.Antiplatelet treatment in hospital was independently associated with treatment in an urban hospital,National Institutes of Health Stroke Scale at onset,and statin use in hospital.Antiplatelet treatment at 1-month follow-up was independently associated with higher income level,diagnosis of transient ischemic attack,antiplatelet treatment in hospital,large artery atherosclerosis according to the Trial of Org 10172 in Acute Stroke Treatment classification,and statin use at follow-up.Modified Rankin Scale >4 at 1-month follow-up and history of coronary heart disease were negatively associated with antiplatelet treatment at follow-up.Conclusions This study documents the current status of antiplatelet treatment in primary and early secondary prevention of ischemic stroke in China.Further education of

  17. South China Sea Challenge

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    China's attempts to solve disputes with ASEAN over the South China Sea help regional peace China's marine economy and security are currently faced with new challenges, requiring careful handling, especially in disputes with ASEAN countries and in promoting common development of the South China Sea. The outcome of how this is dealt with could undoubtedly pave the way for solutions to other oceanic disputes. The South China Sea is located south of

  18. Transition matrix analysis of earthquake magnitude sequences

    International Nuclear Information System (INIS)

    Estimation of complexity is a fascinating research topic in nonlinear signal and system analysis. Information theoretic functionals can be used to identify and quantify general relationships among variables; these relationships can be considered as the fingerprints of complexity. Up to now, the complexity of seismic sequences has been mostly related to the concept of self-similarity, suggesting that the earthquake dynamics can be interpreted as due to many components interacting over a wide range of time or space scales. This paper deals with a new idea of complexity of seismicity, focusing, in particular, on the transition probability between magnitudes. Using the Transition Matrix Method, a set of complexity parameters can be defined for earthquakes. Furthermore, the relationships among these parameters and those characterizing the earthquake magnitude dynamics have been analyzed in simulated and observational seismic sequences

  19. Toward Reconciling Magnitude Discrepancies Estimated from Paleoearthquake Data: A New Approach for Predicting Earthquake Magnitudes from Fault Segment Lengths

    Science.gov (United States)

    Carpenter, N. S.; Payne, S. J.; Schafer, A. L.

    2011-12-01

    We recognize a discrepancy in magnitudes estimated for several Basin and Range faults in the Intermountain Seismic Belt, U.S.A. For example, magnitudes predicted for the Wasatch (Utah), Lost River (Idaho), and Lemhi (Idaho) faults from fault segment lengths, Lseg, where lengths are defined between geometrical, structural, and/or behavioral discontinuities assumed to persistently arrest rupture, are consistently less than magnitudes calculated from displacements, D, along these same segments. For self-similarity, empirical relationships (e.g. Wells and Coppersmith, 1994) should predict consistent magnitudes (M) using diverse fault dimension values for a given fault (i.e. M ~ Lseg, should equal M ~ D). Typically, the empirical relationships are derived from historical earthquake data and parameter values used as input into these relationships are determined from field investigations of paleoearthquakes. A commonly used assumption - grounded in the characteristic-earthquake model of Schwartz and Coppersmith (1984) - is equating Lseg with surface rupture length, SRL. Many large historical events yielded secondary and/or sympathetic faulting (e.g. 1983 Borah Peak, Idaho earthquake) which are included in the measurement of SRL and used to derive empirical relationships. Therefore, calculating magnitude from the M ~ SRL relationship using Lseg as SRL leads to an underestimation of magnitude and the M ~ Lseg and M ~ D discrepancy. Here, we propose an alternative approach to earthquake magnitude estimation involving a relationship between moment magnitude, Mw, and length, where length is Lseg instead of SRL. We analyze seven historical, surface-rupturing, strike-slip and normal faulting earthquakes for which segmentation of the causative fault and displacement data are available and whose rupture included at least one entire fault segment, but not two or more. The preliminary Mw ~ Lseg results are strikingly consistent with Mw ~ D calculations using paleoearthquake data for

  20. China Disabled Persons' Federation

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    China Disabled Persons' Federation (CDPF), founded in Beijing in 1988, is a national organization of/for all persons with disabilities (PWDs) of different categories in China. Mr. Deng Pufang is currently the Chairman.

  1. Forced displacement in Colombia: Magnitude and causes

    OpenAIRE

    Ana María Ibáñez

    2009-01-01

    The article describes the magnitude, geographical extent, and causes of forced populationdisplacements in Colombia. Forced migration in Colombia is a war strategy adopted by armed groups to strengthen territorial strongholds, weaken civilian support to the enemy, seize valuable lands, and produce and transport illegal drugs with ease. Forced displacement in Colombia today affects 3.5 million people. Equivalent to 7.8 percent of Colombia’s population, and second worldwide only to Sudan, this s...

  2. Local magnitude scale for earthquakes in Turkey

    Science.gov (United States)

    Kılıç, T.; Ottemöller, L.; Havskov, J.; Yanık, K.; Kılıçarslan, Ö.; Alver, F.; Özyazıcıoğlu, M.

    2016-06-01

    Based on the earthquake event data accumulated by the Turkish National Seismic Network between 2007 and 2013, the local magnitude (Richter, Ml) scale is calibrated for Turkey and the close neighborhood. A total of 137 earthquakes (Mw > 3.5) are used for the Ml inversion for the whole country. Three Ml scales, whole country, East, and West Turkey, are developed, and the scales also include the station correction terms. Since the scales for the two parts of the country are very similar, it is concluded that a single Ml scale is suitable for the whole country. Available data indicate the new scale to suffer from saturation beyond magnitude 6.5. For this data set, the horizontal amplitudes are on average larger than vertical amplitudes by a factor of 1.8. The recommendation made is to measure Ml amplitudes on the vertical channels and then add the logarithm scale factor to have a measure of maximum amplitude on the horizontal. The new Ml is compared to Mw from EMSC, and there is almost a 1:1 relationship, indicating that the new scale gives reliable magnitudes for Turkey.

  3. Log-scaling magnitude modulated watermarking scheme

    Institute of Scientific and Technical Information of China (English)

    LING HeFei; YUAN WuGang; ZOU FuHao; LU ZhengDing

    2007-01-01

    A real-time watermarking scheme with high robustness and security has been proposed based on modulating the log-scaling magnitudes of DCT coefficients,which is most suitable for JPEG images and MPEG streams. The watermark bit is encoded as the sign of the difference between the individual log-scaling magnitude of a group-region and the average one of all group-regions. The log-scaling magnitude can be modulated by modifying the low and middle frequency DCT coefficients imperceptibly. The robustness of scheme is not only dependent on those largest coefficients, but also on the other coefficients with the same proportion. It can embed 512 bits into an image with a size of 512×512, which can satisfy the payload requirement of most video watermarking applications. Moreover, the watermark embedding process only requires one-sixth of the time consumed during normal playing of video, and the watermark detection only requires one-twelfth of that, which can meet the real-time requirements of most video watermarking applications. Furthermore, the experimental results show that the presented scheme is transparent and robust to significant valumetric distortions (including additive noise, low-pass filtering, lossy compression and valumetric scaling) and a part of geometric distortions. It performs much better than the EMW algorithm in resisting all kinds of distortions except Gaussian noise with a larger deviation.

  4. Calculation of Calibration Functions and Explosive Aftershock Magnitudes in the Near Field

    Institute of Scientific and Technical Information of China (English)

    Li Xuezheng; Wang Haijun; Lei Jun

    2003-01-01

    The current calibration function used in calculating the magnitude of natural earthquakes within 5km is a constant; a fact that causes several serious difficulties for the calculation of the magnitude of small and shallow-focus earthquakes. According to the attenuation law of explosions and the propagation theory of elastic waves, the calibration function is calculated for near field quakes from 0km to 5km. Magnitudes of two aftershock sequences are calculated.The magnitudes of most explosion earthquakes are small, ranging mainly from magnitude 0.5 to 1.0. The M-t chart of the explosive aftershocks is completely different from that of strong earthquake aftershocks. It not only shows positive columnar lines indicating large magnitudes but also short negative columnar lines indicating small magnitudes.

  5. Sedimentary history of the eastern Bohai Sea, China since the deglacial and implications for paleo-tidal current

    Science.gov (United States)

    Yao, Zhengquan; Shi, Xuefa

    2016-04-01

    Numerical simulation suggests that the Holocene sediments re-suspension and distribution in the Bohai Sea was mainly controlled by tidal current regime, which was closely related with sea-level change. Study on sediments in the Bohai Sea thus can provide insights into the evolution of tidal-influenced sedimentary environment and its links with sea-level change. Our understanding of this issue remains incomplete, however, owing to the lack of comprehensive study on sediment core with high-resolution proxies to test such inference. In this study, analyses of sedimentary facies, proxies (grain size, total organic carbon and total nitrogen, X-ray fluorescence scanning Sulfur and Chlorine ratio) and accelerator mass spectrometry 14C dates of a sediment core recovered from the eastern Bohai Sea were carried out to clarify the Holocene sedimentary environment, tidal current change and its relation to the sea-level. The results indicate that the eastern Bohai Sea was dominated by fluvial-coastal environment prior to 12400 cal. a BP due to the sea-level lowstand and changed to tidal-influenced environment from 12400 to 6700 cal. a BP following the rapid sea-level rising. Thereafter shelf environment with minor tidal influence dominated the eastern Bohai Sea under the condition of a deceleration of sea-level rise. The significant change at ~6700 cal. a BP both in sedimentary environment and sediment proxies, indicating an environmental transition from strong tidal-influenced to less tidal-influenced setting. With the sea-level rising from the early Holocene to the mid-Holocene, tidal-current was much strong due to the low sea-level stand and became weak after the maximum transgression at ~6700 cal. a BP. These results are consistent with the numerical simulation, which suggested that less strong tidal current were the consequence of the most highstand sea-level since the mid-Holocene. Our study thus provides a sedimentary record to support the interpretation of numerical

  6. Field Observation and Analysis of Wave-Current-Sediment Movement in Caofeidian Sea Area in the Bohai Bay, China

    Institute of Scientific and Technical Information of China (English)

    左利钦; 际永军; 汪亚平; 刘怀湘

    2014-01-01

    In order to study the mechanism of flow-sediment movement, it is essential to obtain measured data of water hydrodynamic and sediment concentration process with high spatial and temporal resolution in the bottom boundary layer (BBL). Field observations were carried out in the northwest Caofeidian sea area in the Bohai Bay. Near 2 m isobath (under the lowest tidal level), a tripod system was installed with AWAC (Acoustic Wave And Current), ADCP (Acoustic Doppler Current Profilers), OBS-3A (Optical Backscatter Point Sensor), ADV (Acoustic Doppler Velocimeters), etc. The accurate measurement of the bottom boundary layer during a single tidal period was carried out, together with a long-term sediment concentration measurement under different hydrological conditions. All the measured data were used to analyze the characteristics of wave-current-sediment movement and the BBL. Analysis was performed on flow structure, shear stress, roughness, eddy viscosity and other parameters of the BBL. Two major findings were made. Firstly, from the measured data, the three-layer distribution model of the velocity profiles and eddy viscosities in the wave-current BBL are proposed in the observed sea area; secondly, the sediment movement is related closely to wind-waves in the muddy coast area where sediment is clayey silt:1) The observed suspended sediment concentration under light wind conditions is very low, with the peak value generally smaller than 0.1 kg/m3 and the average value being 0.03 kg/m3;2) The sediment concentration increases continuously under the gales over 6-7 in Beaufort scale, under a sustained wind action. The measured peak sediment concentration at 0.4 m above the seabed is 0.15-0.32 kg/m3, and the average sediment concentration during wind-wave action is 0.08-0.18 kg/m3, which is about 3-6 times the value under light wind conditions. The critical wave height signaling remarkable changes of sediment concentration is 0.5 m. The results show that the suspended load

  7. Formation and evolution of the modem warm current system in the East China Sea and the Yellow Sea since the last deglaciation

    Institute of Scientific and Technical Information of China (English)

    LI Tiegang; NAN Qingyun; JIANG Bo; SUN Rongtao; ZHANG Deyu; LI Qing

    2009-01-01

    To reconstruct the formation and evolution process of the warm current system within the East China Sea (ECS) and the Yellow Sea (YS) since the last deglaciation, the paleoceangraphic records in core DGKS9603, core CSH1 and core YSDPI02, which were retrieved from the mainstream of the Kuroshio Current (KC), the edge of the modem Tsushima Warm Current (TWC) and muddy region under cold waters accreted with the Yellow Sea Warm Current (YSWC) respectively, were synthetically analyzed. The results indicate that the formation and evolution of the modem warm current system in the ECS and the YS has been accompanied by the development of the KC and impulse rising of the sea level since the last deglaciation. The influence of the KC on the Okinawa Trough had enhanced since 16 cal kyr BE and synchronously the modem TWC began to develop with the rising of sea level and finally formed at about 8.5 cal kyr BP. The KC had experienced two weakening process during the Heinrich event 1 and the Younger Drays event from 16 to 8.5 cal kyr BP. The period of 7-6 cal kyr BP was the strongest stage of the KC and the TWC since the last deglaciation. The YSWC has appeared at about 6.4 cal kyr BP. Thus,the warm current system of the ECS and the YS has ultimately formed. The weakness of the KC,indicated by the occurrence of Pulleniatina minimum event (PME) during the period from 5.3 to 2.8 cal kyr BE caused the main stream of the TWC to shift eastward to the Pacific Ocean around about 3 cal kyr BP. The process resulted in the intruding of continent shelf cold water mass with rich nutrients. Synchronously, the strength of the YSWC was relatively weak and the related cold water body was active at the early-mid stage of its appearance against the PME background, which resulted in the quick formation of muddy deposit system in the southeastern YS. The strength of the warm current system in the ECS and the YS has enhanced evidently, and approached to the modern condition gradually since 3 cal kyr

  8. Scaling Relations of Local Magnitude versus Moment Magnitude for Sequences of Similar Earthquakes in Switzerland

    KAUST Repository

    Bethmann, F.

    2011-03-22

    Theoretical considerations and empirical regressions show that, in the magnitude range between 3 and 5, local magnitude, ML, and moment magnitude, Mw, scale 1:1. Previous studies suggest that for smaller magnitudes this 1:1 scaling breaks down. However, the scatter between ML and Mw at small magnitudes is usually large and the resulting scaling relations are therefore uncertain. In an attempt to reduce these uncertainties, we first analyze the ML versus Mw relation based on 195 events, induced by the stimulation of a geothermal reservoir below the city of Basel, Switzerland. Values of ML range from 0.7 to 3.4. From these data we derive a scaling of ML ~ 1:5Mw over the given magnitude range. We then compare peak Wood-Anderson amplitudes to the low-frequency plateau of the displacement spectra for six sequences of similar earthquakes in Switzerland in the range of 0:5 ≤ ML ≤ 4:1. Because effects due to the radiation pattern and to the propagation path between source and receiver are nearly identical at a particular station for all events in a given sequence, the scatter in the data is substantially reduced. Again we obtain a scaling equivalent to ML ~ 1:5Mw. Based on simulations using synthetic source time functions for different magnitudes and Q values estimated from spectral ratios between downhole and surface recordings, we conclude that the observed scaling can be explained by attenuation and scattering along the path. Other effects that could explain the observed magnitude scaling, such as a possible systematic increase of stress drop or rupture velocity with moment magnitude, are masked by attenuation along the path.

  9. The correlation between Prorocentrum donghaiense blooms and the Taiwan warm current in the East China Sea - evidence for the "Pelagic Seed Bank" hypothesis.

    Directory of Open Access Journals (Sweden)

    Xinfeng Dai

    Full Text Available During the last two decades, large-scale high biomass algal blooms of the dinoflagellate Prorocentrum donghaiense Lu have occurred frequently in the East China Sea (ECS. The role of increasing nutrient concentrations in driving those blooms is well-established, but the source population that initiates them is poorly understood. We hypothesized that the front of Taiwan Warm Current (TWC may serve as a 'seed bank' that initiates P. donghaiense blooms in the ECS, as the physiochemical conditions in the TWC are suitable for the growth of P. donghaiense. In order to test this hypothesis, two surveys at different spatio-temporal scales were conducted in 2010 and 2011. We found a strong correlation in space and time between the abundance of P. donghaiense and the TWC. The spatial extent of the P. donghaiense bloom coincided with the TWC front in both 2010 and 2011. During the early development of the blooms, P. donghaiense concentration was highest at the TWC front, and then the bloom mass shifted inshore over the course of our 2011 survey. The TWC also moved inshore, albeit after the appearance of P. donghaiense. Overall, these results support our hypothesis that P. donghaiense blooms develop from the population at the TWC front in the ECS, suggesting the role of the ocean current front as a seed bank to dinoflagellate blooms.

  10. Quaternary clay mineralogy in the northern South China Sea (ODP Site 1146)--Implications for oceanic current transport and East Asian monsoon evolution

    Institute of Scientific and Technical Information of China (English)

    LIU Zhifei(刘志飞); Alain Trentesaux; Steven C. Clemens; WANG Pinxian(汪品先)

    2003-01-01

    Measurement of clay mineralogy at ODP Site 1146 in the northern South China Sea (SCS) indicates that illite, chlorite, and kaolinite contents increased during glacials and smectite content increased during interglacials. The smectite/(illite+chlorite) ratio and the smectite abundance were determined as mineralogical indicators for the East Asian monsoon evolution. At a 10 ka timescale, prevailing southeasterly surface oceanic currents during interglacials transported more smectite from the south and east areas to the north, showing a strengthened summer monsoon circulation, whereas dominated counter-clockwise surface currents during glacials carried more illite and chlorite from Taiwan as well as from the Yangtze River via the Luzon Strait to the northern SCS, indicating a strongly intensified winter monsoon. Based on a 100 ka timescale, a linear correlation between the smectite/(illite+chlorite) ratio and the sedimentation rate reflects that the winter monsoon has prevailed in the northern SCS in the intervals 2000-1200 ka and 400-0 ka and the summer monsoon did the same in the interval 1200-400 ka. The evolution of the summer monsoon provides an almost linear response to the summer insolation of Northern Hemisphere, implying an astronomical forcing of the East Asian monsoon evolution.

  11. 我国主产地柑橘的农药残留现状研究%Current Situation of Pesticide Residues in Citrus from China

    Institute of Scientific and Technical Information of China (English)

    张耀海; 焦必宁; 赵其阳; 王成秋; 周志钦

    2011-01-01

    我国柑橘生产使用农药种类多、剂量大,对产品质量安全有一定影响.文中采用气相色谱和高效液相色谱检测技术,对我国6省(市)柑橘产地抽取的198个鲜果样品进行了26种农药残留的检测与评价.10种农药残留检出,包括禁限用农药,其中1个样品有1种农残超标,超标率为0.47%,各省(市)柑橘鲜果样品的农药残留检出率均在48.9%以上,我国柑橘质量安全存在潜在风险.%The wide varieties and massive doses of pesticide residues applied in citrus production has influence on citrus safety quality in China.The current situation of citrus safety was investigated to provide basic reference in the evaluation of potential risks.All samples from six provinces or cities were determined by gas chromatography (GC) and high performance liquid chromatography (HPLC) to monitor twenty-six pesticides.Ten of twenty six pesticides residues were detected and one exceeded the MRLs.Of all the samples, 0.47% exceeded the MRLs.The detectable rates of samples from six main producing areas were above 48.9%.There is a potential risk in Citrus products in China.In order to ensure the citrus safety in China, we need to strengthen pesticide residue examination, enhance disease-carrying insect monitor and preventing technical guidance, promote non-environmental damage and green citrus production technology.We also need to improve our detecting technology and catch up with international advanced analysis method.

  12. Current situation and suggestions for pressure ulcer management in China%我国压疮管理现状与建议

    Institute of Scientific and Technical Information of China (English)

    张洪君; 卢㛃; 刘金莲

    2014-01-01

    Pressure ulcer is a common and important complication in clinical nursing. Its mechanism is complicated. Pressure ulcer widely exists in different departments of hospital and would greatly inlfuence patients. This paper summarized and analyzed the current situation of pressure ulcer management in China. The ideas and methods of pressure ulcer management from abroad had been applied in some medical institutions in China, and were modiifed in order to ift themselves. But due to the diversity of our medical institutions, we still need to formulate a uniifed nursing standard to improve the prevention and treatment management of pressure ulcer in our country.%压疮是临床护理工作中常见的重要并发症,其发生机制复杂,广泛存在于各科室,给患者带来较大影响。本文通过对目前我国压疮管理现状的分析发现,国际压疮护理管理理念和方法已经在我国部分医疗机构得到改进和应用,逐步形成适合我国的压疮防治规范。但是,由于我国各地医疗机构水平参差不齐,为提高全国整体压疮预防与治疗管理水平,还须制订统一的全国压疮护理标准。

  13. Current status of drug resistance ofStreptococcus pneumoniae isolated from children in China%儿童肺炎链球菌耐药现状

    Institute of Scientific and Technical Information of China (English)

    葛玲丽; 韩志英

    2016-01-01

    Streptococcus pneumoniae is the most common bacterial pathogen of community- acquired infections in children, and antibiotics are the effective way of treatment for pneumococcal disease. Disease burden of pneumococcal infections has increased due to enhanced antibiotic resistance of Streptococcus pneumoniae, and it has a large regional differences. In recent years, surveillance for bacterial resistance ofStreptococcus pneumoniaeamong children has enhanced, and the related researches are increasing in China. This article provided an overview of the current status of drug resistance of Streptococcus pneumoniaeto β-lactam antibiotics, macrolide antibiotics and other antibiotics in children in China.%肺炎链球菌是儿童社区获得性感染最常见细菌病原,抗菌药物是治疗肺炎链球菌疾病的有效手段。由于抗生素的长期过度使用,肺炎链球菌对抗生素的耐药性逐渐增强,肺炎链球菌感染性疾病造成的负担逐渐加重,且不同地区差异较大。近年来国内对儿童肺炎链球菌抗生素耐药性的监测加强,文献报道增多,此文就国内儿童肺炎链球菌对β-内酰胺类、大环内酯类及其他种类抗生素的耐药状况进行综述。

  14. Sequential dependencies in magnitude scaling of loudness

    DEFF Research Database (Denmark)

    Joshi, Suyash Narendra; Jesteadt, Walt

    2013-01-01

    Ten normally hearing listeners used a programmable sone-potentiometer knob to adjust the level of a 1000-Hz sinusoid to match the loudness of numbers presented to them in a magnitude production task. Three different power-law exponents (0.15, 0.30, and 0.60) and a log-law with equal steps in d......, therefore, to choose knob properties that minimized these dependencies. When the sequential dependencies were removed from the data, the slope of the loudness functions did not change, but the variability decreased. Sequential dependencies were only present when the level of the tone on the previous trial...

  15. Prediction of maximum magnitude and original time of reservoir induced seismicity

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    This paper deals with the prediction of potentially maximum magnitude and origin time for reservoir induced seismicity (RIS). The factor and sign of seismology and geology of RIS has been studied, and the information quantity for magnitude of induced seismicity provided by them has been calculated. In terms of information quan-tity the biggest possible magnitude of RIS is determined. The changes of seismic frequency with time are studied using grey model method, and the time of the biggest change rate is taken as original time of the main shock. The feasibility of methods for predicting magnitude and time has been tested for the reservoir induced seismicity in the Xinfengjiang reservoir, China and the Koyna reservoir, India.

  16. Involvement of Working Memory in Longitudinal Development of Number-Magnitude Skills

    NARCIS (Netherlands)

    Kolkman, Meijke E.; Kroesbergen, Evelyn; Leseman, Paul

    2014-01-01

    The ability to connect numbers and magnitudes is an important prerequisite for math learning, here referred to as number-magnitude skills. It has been proposed that working memory plays an important role in constructing these connections. The aim of the current study was to examine if working memory

  17. CFD simulation on the generation of turbidites in deepwater areas:a case study of turbidity current processes in Qiongdongnan Basin, northern South China Sea

    Institute of Scientific and Technical Information of China (English)

    JIANG Tao; ZHANG Yingzhao; TANG Sulin; ZHANG Daojun; ZUO Qianmei; LIN Weiren; WANG Yahui; SUN Hui; WANG Bo

    2014-01-01

    Turbidity currents represent a major agent for sediment transport in lakes, seas and oceans. In particu-lar, they formulate the most significant clastic accumulations in the deep sea, which become many of the world’s most important hydrocarbon reservoirs. Several boreholes in the Qiongdongnan Basin, the north-western South China Sea, have recently revealed turbidity current deposits as significant hydrocarbon res-ervoirs. However, there are some arguments for the potential provenances. To solve this problem, it is es-sential to delineate their sedimentary processes as well as to evaluate their qualities as reservoir. Numerical simulations have been developed rapidly over the last several years, offering insights into turbidity current behaviors, as geologically significant turbidity currents are difficult to directly investigate due to their large scale and often destructive nature. Combined with the interpretation of the turbidity system based on high-resolution 3D seismic data, the paleotophography is acquired via a back-stripping seismic profile integrated with a borehole, i.e., Well A, in the western Qiongdongnan Basin; then a numerical model is built on the basis of this back-stripped profile. After defining the various turbidity current initial boundary conditions, includ-ing grain size, velocity and sediment concentration, the structures and behaviors of turbidity currents are investigated via numerical simulation software ANSYS FLUENT. Finally, the simulated turbidity deposits are compared with the interpreted sedimentary bodies based on 3D seismic data and the potential provenances of the revealed turbidites by Well A are discussed in details. The simulation results indicate that a sedimen-tary body develops far away from its source with an average grain size of 0.1 mm, i.e., sand-size sediment. Taking into account the location and orientation of the simulated seismic line, the consistence between normal forward simulation results and the revealed cores

  18. Absolute Magnitude Calibration for Dwarfs Based on the Colour-Magnitude Diagrams of Galactic Clusters

    CERN Document Server

    Karaali, S; Bilir, S; Guctekin, S Tuncel

    2014-01-01

    We present two absolute magnitude calibrations for dwarfs based on colour-magnitude diagrams of Galactic clusters. The combination of the $M_g$ absolute magnitudes of the dwarf fiducial sequences of the clusters M92, M13, M5, NGC 2420, M67 and NGC 6791 with the corresponding metallicities provides absolute magnitude calibration for a given $(g-r)_0$ colour. The calibration is defined in the colour interval $0.25\\leq (g-r)_0 \\leq 1.25$ mag and it covers the metallicity interval $-2.15\\leq \\lbrack Fe/H\\rbrack \\leq +0.37$ dex. The absolute magnitude residuals obtained by the application of the procedure to another set of Galactic clusters lie in the interval $-0.15 \\leq \\Delta M_g \\leq +0.12$ mag. The mean and standard deviation of the residuals are $=-0.002$ and $\\sigma=0.065$ mag, respectively. The calibration of the $M_J$ absolute magnitude in terms of metallicity is carried out by using the fiducial sequences of the clusters M92, M13, 47 Tuc, NGC 2158 and NGC 6791. It is defined in the colour interval $0.90 ...

  19. The Analysis and Research on Current Situation and Counter measures of Mobile Laboratory Standards in China%中国移动实验室标准的现状分析与对策研究

    Institute of Scientific and Technical Information of China (English)

    陈弘; 苏锡辉; 刘阳

    2014-01-01

    Based on lots of field investigations and researches, this article analyzes in details the current situation of mobile laboratory standards in China, summarizes and explains the existing problems in standardization, and puts forward reasonable measures for the development of the industry.

  20. The Road to Convergence in Earthquake Frequency-Magnitude Statistics

    Science.gov (United States)

    Naylor, M.; Bell, A. F.; Main, I. G.

    2013-12-01

    The Gutenberg-Richter frequency-magnitude relation is a fundamental empirical law of seismology, but its form remains uncertain for rare extreme events. Convergence trends can be diagnostic of the nature of an underlying distribution and its sampling even before convergence has occurred. We examine the evolution of an information criteria metric applied to earthquake magnitude time series, in order to test whether the Gutenberg-Richter law can be rejecting in various earthquake catalogues. This would imply that the catalogue is starting to sample roll-off in the tail though it cannot yet identify the form of the roll-off. We compare bootstrapped synthetic Gutenberg-Richter and synthetic modified Gutenberg-Richter catalogues with the convergence trends observed in real earthquake data e.g. the global CMT catalogue, Southern California and mining/geothermal data. Whilst convergence in the tail remains some way off, we show that the temporal evolution of model likelihoods and parameters for the frequency-magnitude distribution of the global Harvard Centroid Moment Tensor catalogue is inconsistent with an unbounded GR relation, despite it being the preferred model at the current time. Bell, A. F., M. Naylor, and I. G. Main (2013), Convergence of the frequency-size distribution of global earthquakes, Geophys. Res. Lett., 40, 2585-2589, doi:10.1002/grl.50416.

  1. 我国现行创业投资法规之检视%On Current Regulations of Venture Capital in China

    Institute of Scientific and Technical Information of China (English)

    丁洁

    2012-01-01

    创业投资的发展,离不开法律的引导与支持,法律环境的友善是产业蕴育、吸引新进者及外商进入的重要因素。法制的完善与否直接影响创业投资活动的精准运作程度和投资风险的可预期性,进而影响投资者的投资意愿。本文以为创业投资企业提供的特别法律保护为切入点,以《创业投资企业管理暂行办法》和《外商投资创业投资企业管理规定》为核心进行比较与研究,并对其与我国现行《公司法》及外商企业法冲突之处予以检视,认为可将我国目前的创投法制体系视为创投法制发展的过渡阶段,但发展成熟之后应尽可能放宽法令限制,扩大企业自治范围,由创投企业自主构建契约治理机制。%The development of venture capital investment cannot do without the guidance and support of the law and the legal environment is an important factor to breed industry, attract new entrants and foreign access. Perfection of the legal system will impact directly the precise operation of venture capital investment activities, predictability of investment risk, thereby affecting investors' willingness to invest. This paper, starting from nine special legal protection for the venture capital enterprises, makes a comparison between and analysis of Interim Measures for the Administration of Venture Capital Enterprises and Foreign - inves- ted Venture Capital Enterprise Management Provisions, and examines the conflict between them and current Company Law and Foreign Enterprise Law in China. And it holds that current China' s venture capital legal system can be regarded as the transition phase of the venture capital development of the legal system, but after it developed maturely, it is suggested to relax the statute of limitations, expand the corporate limits of the autonomy and courage the venture capital company to build their own contractual governance mechanisms.

  2. 近期中国社会语言学的几个热点%Current topics of general interest in sociolinguistics in China

    Institute of Scientific and Technical Information of China (English)

    陈章太

    2001-01-01

    Since sociolinguistics was introduced into China during the 70's of last century, sociolinguistic studies, especially macrosociolinguistic studies, have made rapid progress in various fields. To illustrate this point, the paper focuses on the status quo of the studies in language identification, endangered languages, bilingualism and professional jargons. The author concludes that China's sociolinguistics is still young and immature, however, sociolinguistics has a vast range of prospects, as the social circumstances of China provide very favorable conditions for its development.

  3. Violence against women: global scope and magnitude.

    Science.gov (United States)

    Watts, Charlotte; Zimmerman, Cathy

    2002-04-01

    An increasing amount of research is beginning to offer a global overview of the extent of violence against women. In this paper we discuss the magnitude of some of the most common and most severe forms of violence against women: intimate partner violence; sexual abuse by non-intimate partners; trafficking, forced prostitution, exploitation of labour, and debt bondage of women and girls; physical and sexual violence against prostitutes; sex selective abortion, female infanticide, and the deliberate neglect of girls; and rape in war. There are many potential perpetrators, including spouses and partners, parents, other family members, neighbours, and men in positions of power or influence. Most forms of violence are not unique incidents but are ongoing, and can even continue for decades. Because of the sensitivity of the subject, violence is almost universally under-reported. Nevertheless, the prevalence of such violence suggests that globally, millions of women are experiencing violence or living with its consequences. PMID:11955557

  4. 我国家具产品的包装现状及发展趋势%The Current Situation and Development Tendency of Furniture Packaging of China

    Institute of Scientific and Technical Information of China (English)

    孙晓; 韩静芸; 张求慧; 张亚池

    2013-01-01

    对家具包装的定义、作用、设计要求及设计内容等进行初步探讨。通过总结我国家具产品包装方式的现状,分析出其存在的问题,归纳出以下几点家具包装行业发展方向,分别是研究应用新型材料、设计拼装类结构包装、规范家具包装相关规定、加大包装回收力度、利用包装进行家具促销和聘用专职人员从事家具包装工作等。%This paper preliminary studies the definition, function, design requirements as well as design contents of furniture packaging. By summarizing the current situation of furniture packaging of China, this paper analyzes the existing problems. The developing direction of furniture packaging industry could be concluded as studying the application of new materials, designing the assembled class structure packaging, regulating the relevant provisions of furniture packaging, enhancing the intensity of packaging recycling, using the packaging to promote the furniture sales, employing professionals to work on furniture packaging and so on.

  5. 当前国内汽车营销策略重构探析%An Analysis of the Reconstruction of China's Current Automobile Marketing Strategy

    Institute of Scientific and Technical Information of China (English)

    胡海侠

    2012-01-01

    China's automobile market is now showing the competition of a "post-market", which means that the past 4S sales mode and marketing strategy is lagging behind the current situation and there is an imperative need to introduce the management concept of integrated marketing communication and the new 4V marketing strategy. The new approaches require intensive service marketing, enriched marketing modes and service items and differentiated marketing methods. The new approaches also call for the full exploitation of products and services, the increased value for money and the rapid improvement of informationization and marketing talent training. Only in this way can the new market trends be met.%目前国内汽车市场正进入“后市场”竞争时代,原有的4S销售模式和营销策略已经有所滞后,急需引入整合营销传播的管理理念和4V新型营销策略,深化服务营销,扩充营销模式和服务内涵,体现差异化营销,充分挖掘产品和服务功能,增加附加值,并加速完善信息化和营销人才培养机制,以适应新市场趋势的需求。

  6. The Current Situation and Tendency of Underground Space Planning in China%中国地下空间规划现状与趋势

    Institute of Scientific and Technical Information of China (English)

    邵继中; 王海丰

    2013-01-01

      对于城市的地下空间规划,中国许多城市已进行了初步探索,积累了一定经验。但同时,由于法律、政策、技术等原因对地下空间规划的未来发展形成了阻碍。所以,本文通过对中国城市地下空间规划现状的调查与分析,剖析现阶段地下空间规划与利用过程中的有关问题。创新性地提出建立与地面规划相协调的从总规到详规的统一体系,并展望地下空间规划的未来蓝图。%Many cities in China have carried out the preliminary explorations about urban underground space planning, and accumulated experiences. However, the underground space planning has some barriers on the way of its future development due to the law, government policies, technical problems etc. This article shows results of investigation and analysis about the current situation of Chinese urban underground space planning, dissects the relevant issues in the process of current underground space planning and utilizing. It also proposes innovatively in this paper to establish the unified system which is coordinating with the ground planning, and includes both general regulations and the detailed regulations. The underground space planning blueprint for the future is also descried.

  7. The eddy-mean flow interaction and the intrusion of western boundary current into the South China Sea type basin in an idealized model

    Science.gov (United States)

    Zhong, Linhao

    2016-04-01

    In this paper, an ideal model on the role of mesoscale eddies in the Kuroshio intruding into the South China Sea (SCS) is developed, which represents the northwestern Pacific and the SCS by two rectangle basins connected by a gap. In the case of only considering intrinsic ocean variability, a time-dependent western boundary current (WBC) driven by steady wind is modeled under both eddy-resolving and non-eddy-resolving resolutions. Almost all simulated WBC intrudes into the adjacent sea in the form of loop current with multiple-state transitions and eddy-shedding process, which has aperiodic variations on intraseasonal or interannual scales, determined by the eddy-induced WBC variation. For the parameters considered in this paper, the WBC intrusion exhibits a 30~90-day cycle in the presence of the subgrid-scale eddy forcing (SSEF), but a 300~500-day cycle in the absence of SSEF. Moreover, the roles of the resolved (grid-scale) and unresolved (subgrid-scale) eddies in the WBC intrusion are studied. It is found that the unresolved eddy-flow interaction strongly regulates the WBC intrusion through the PV forcing induced by shear flows and baroclinic processes. But the resolved eddy forcing, which is dominated by the eddy-eddy interaction solely through baroclinic processes, shows weak correlation to the WBC intrusion. The associated eddy-induced PV exchange between the two basins is mainly accomplished by isopycnal-thickness eddy fluxes, particularly by the cross-front PV fluxes due to the unresolved eddy. And the unresolved eddy-flow interaction, as well as resolved and unresolved eddy-eddy interactions, mainly governs the PV transport for the WBC intrusion.

  8. Correlation between subsurface high-salinity water in the northern South China Sea and the North Equatorial Current-Kuroshio circulation system from HYCOM simulations

    Science.gov (United States)

    Wang, A.; Du, Y.; Zhuang, W.; Qi, Y.

    2015-04-01

    The North Pacific Tropical Water (NPTW), characterized by subsurface high salinity, is observed in the South China Sea (SCS) and is often used as an indicator of the water intrusion from the northwestern Pacific into the SCS. Based on the assimilation product from a global high-resolution Hybrid Coordinate Ocean Model (HYCOM) from 2008 through 2013, this study investigates the seasonal variability of subsurface high-salinity water (SHSW) in the northern SCS and its relationship with the North Equatorial Current-Kuroshio circulation system. Results show that the obvious seasonal variability of the SHSW appears at about 100-200 m in depth. It extends as far west as southeast of Hainan, reaching its volume maximum (minimum) in January (May). The seasonal variance contribution (seasonal variance accounting for the entire variance) is 0.38 in the period we considered, albeit with significant annual variance in other years. Further analysis shows that the changes in high-salinity water volume are highly correlated with the shift in the North Equatorial Current bifurcation latitude (NECBL), which reaches its northernmost point in December and its southernmost point in May. Due to the large-scale wind changes in the Pacific, the Luzon Strait transport (LST) weakens (strengthens) when the NECBL shifts to the south (north) during summer (winter), which results in the reduced (enhanced) SHSW intrusion from the northwestern Pacific into the northern SCS. It is also found that, on a seasonal timescale, the Kuroshio transport (KT) does not vary in phase with NECBL, LST and SHSW, indicating that the KT changes are probably not the governing factor for the seasonal variability of SHSW in the northern SCS.

  9. Understanding high magnitude flood risk: evidence from the past

    Science.gov (United States)

    MacDonald, N.

    2009-04-01

    The average length of gauged river flow records in the UK is ~25 years, which presents a problem in determining flood risk for high-magnitude flood events. Severe floods have been recorded in many UK catchments during the past 10 years, increasing the uncertainty in conventional flood risk estimates based on river flow records. Current uncertainty in flood risk has implications for society (insurance costs), individuals (personal vulnerability) and water resource managers (flood/drought risk). An alternative approach is required which can improve current understanding of the flood frequency/magnitude relationship. Historical documentary accounts are now recognised as a valuable resource when considering the flood frequency/magnitude relationship, but little consideration has been given to the temporal and spatial distribution of these records. Building on previous research based on British rivers (urban centre): Ouse (York), Trent (Nottingham), Tay (Perth), Severn (Shrewsbury), Dee (Chester), Great Ouse (Cambridge), Sussex Ouse (Lewes), Thames (Oxford), Tweed (Kelso) and Tyne (Hexham), this work considers the spatial and temporal distribution of historical flooding. The selected sites provide a network covering many of the largest river catchments in Britain, based on urban centres with long detailed documentary flood histories. The chronologies offer an opportunity to assess long-term patterns of flooding, indirectly determining periods of climatic variability and potentially increased geomorphic activity. This research represents the first coherent large scale analysis undertaken of historical multi-catchment flood chronologies, providing an unparalleled network of sites, permitting analysis of the spatial and temporal distribution of historical flood patterns on a national scale.

  10. Made in China

    OpenAIRE

    Fan, Y.

    2005-01-01

    China has a long history in commerce and marketing. For many centuries, 'Made in China' was a high quality, prestige label imported exclusively for the royals and the rich. This paper traces the history of Made in China and reports current branding practice in the world’s largest market.

  11. The Current Situation and Countermeasures of Foreign Exchange Management of Capital Projects in China%我国资本项目外汇管理的现状及对策探讨

    Institute of Scientific and Technical Information of China (English)

    张大龙

    2015-01-01

    我国资本项目的开放一直备受国内国际经济界的关注.本文通过分析我国资本项目外汇管理的现状及其所面临的突出问题,以此探讨如何完善我国资本项目外汇管理的相关对策建议.%The opening of capital projects in China has been concerned by domestic and international economic circles. This paper analyzes the current situation of China's foreign exchange management of capital projects and the outstanding issues, in order to explore how to improve China's capital projects related to foreign exchange management of relevant countermeasures.

  12. 我国金融行业物流现状及发展前景初探%Current Situation of Financial Industry Logistics in China and First Exploration of Development Future

    Institute of Scientific and Technical Information of China (English)

    李鹏

    2013-01-01

    首先在如何区分金融物流和金融行业物流的概念上加以诠释,然后用例证的手法阐述了我国金融行业物流当前的现状、与发达国家的差距等.在结论的部分强调了我国金融行业物流方兴正艾,未来有良好的发展前景.%First of all, explain how to distinguish the concepts of logistics finance from financial industry logistics; secondly, illustrate the current situation of financial industry logistics in China, gap between China and developed areas. In conclusion, emphasize financial industry logistics has a promising future in China.

  13. Extended arrays for nonlinear susceptibility magnitude imaging

    Science.gov (United States)

    Ficko, Bradley W.; Giacometti, Paolo; Diamond, Solomon G.

    2016-01-01

    This study implements nonlinear susceptibility magnitude imaging (SMI) with multifrequency intermodulation and phase encoding. An imaging grid was constructed of cylindrical wells of 3.5-mm diameter and 4.2-mm height on a hexagonal two-dimensional 61-voxel pattern with 5-mm spacing. Patterns of sample wells were filled with 40-μl volumes of Fe3O4 starch-coated magnetic nanoparticles (mNPs) with a hydrodynamic diameter of 100 nm and a concentration of 25 mg/ml. The imaging hardware was configured with three excitation coils and three detection coils in anticipation that a larger imaging system will have arrays of excitation and detection coils. Hexagonal and bar patterns of mNP were successfully imaged (R2 > 0.9) at several orientations. This SMI demonstration extends our prior work to feature a larger coil array, enlarged field-of-view, effective phase encoding scheme, reduced mNP sample size, and more complex imaging patterns to test the feasibility of extending the method beyond the pilot scale. The results presented in this study show that nonlinear SMI holds promise for further development into a practical imaging system for medical applications. PMID:26124044

  14. Demographic factors predict magnitude of conditioned fear.

    Science.gov (United States)

    Rosenbaum, Blake L; Bui, Eric; Marin, Marie-France; Holt, Daphne J; Lasko, Natasha B; Pitman, Roger K; Orr, Scott P; Milad, Mohammed R

    2015-10-01

    There is substantial variability across individuals in the magnitudes of their skin conductance (SC) responses during the acquisition and extinction of conditioned fear. To manage this variability, subjects may be matched for demographic variables, such as age, gender and education. However, limited data exist addressing how much variability in conditioned SC responses is actually explained by these variables. The present study assessed the influence of age, gender and education on the SC responses of 222 subjects who underwent the same differential conditioning paradigm. The demographic variables were found to predict a small but significant amount of variability in conditioned responding during fear acquisition, but not fear extinction learning or extinction recall. A larger differential change in SC during acquisition was associated with more education. Older participants and women showed smaller differential SC during acquisition. Our findings support the need to consider age, gender and education when studying fear acquisition but not necessarily when examining fear extinction learning and recall. Variability in demographic factors across studies may partially explain the difficulty in reproducing some SC findings. PMID:26151498

  15. Childhood Cataract: Magnitude, Management, Economics and Impact

    Directory of Open Access Journals (Sweden)

    BR Shamanna

    2004-01-01

    Full Text Available The prevalence of blindness among children in different regions varies from 0.2/1000 children to over 1.5/1000 children with a global figure estimated at 0.7/1000. This means that there are an estimated 1.4 million blind children worldwide.1 The proportion of blindness in children due to cataract varies considerably between regions from 10%-30% with a global average estimated at 14%, giving 190,000 children blind from cataract. 2 While the magnitude of childhood cataracts varies from place to place, it is a priority within all blindness control programmes for children. Children who are blind have to overcome a lifetime of emotional, social and economic difficulties which affect the child, the family and society.3 Loss of vision in children influences their education, employment and social life. The numbers blind with cataract do not reflect the years of disability and lost quality of life. Childhood blindness is second only to adult cataract as a cause of blind-person years. Approximately 70 million blind-person years are caused by childhood blindness of which about 10 million blind-person years (14% is due to childhood cataract. Timely recognition and intervention can eliminate blind-years due to childhood cataract, as the condition is treatable.

  16. Geoinformatics Education in China

    OpenAIRE

    Li, D.; Gong, J; Yue, P.

    2014-01-01

    The paper will give an overview of the current status of education in Geoinformatics in China. First, the paper will provide a general review of the scientific and technological development of Geoinformatics in China. It then presents how the development affects the education and training in China. In the paper, universities and institutes in China that can award academic degrees related to Geoinformatics will be summarized. Next, the paper will report the work having been done by th...

  17. CHINA SEEKS REGIONAL ENERGY COOPERATION

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    China is seeking to diversify channels for energy cooperation as it faces mounting challenges from surging energy demand, geopolitical risks and price volatility. The endowment and distribution of China's resources does not match the current situation of China's economic development. Those are the opinions aired by officials and experts at an international expo recently held in West China's Xinjiang Uygur Autonomous Region.

  18. 我国椰子副产物的利用现状及对策%Current Situation and Countermeasures of Utilization of Coconut By -product in China

    Institute of Scientific and Technical Information of China (English)

    曾鹏; 刘立云; 孙程旭; 冯美利

    2011-01-01

    The article investigated and analyzed the current situation of researches and utilization of coconut by -products (coconut pericarp, coconut water, coconut bran, coconut cake, coconut wood and coconut litter crack) in China, and pointed out the existent main problems in the utilization of coconut by -products, including low recognition degree and awareness of resource utilization, inadequate scientific research investment and low technological content of products, behindhand equipments and small scale production , imperfect policy and insufficient service system. The following countermeasures for the utilization of coconut by - products were proposed; government guidance and support, strengthening scientific research and development, integration of technology, establishing and improving the policy for the utilization of agricultural resources.%分析了我国椰子副产物利用的现状和存在问题,主要是椰子果皮、椰子水、椰麸、椰粕、椰子木和椰子枯落裂物的研究和利用现状,指出当前椰子副产物利用方面的主要问题是重视程度不够,资源利用意识低;科研投入不足,产品科技含量低;技术装备落后,生产规模小;政策不健全,服务体系缺乏等问题.并提出了其利用对策,包括:政府引导与支持;加强科研开发力度;技术集成;建立与健全农业资源化利用政策.

  19. 我国零供关系现状分析%Current Status of theR elationship between Retailers and Suppliers in China

    Institute of Scientific and Technical Information of China (English)

    王维莉

    2014-01-01

    Retailers and suppliers contradiction is always a problem in the development of China ′s circulation industry . It is often seen that the retailers don′t make promotions properly , some retailers and suppliers make an uneven bargain . The problems currently spread from the entity economy to the field of e -commerce.Conflict between retailers and sup-pliers hurts consumers , retailers and suppliers as well , and affect the normal market order .In order to explore the con-flicts between suppliers and retailers , and find out the essence and rule , this paper summarizes the main forms of contra-diction between retailers and suppliers , analyzes the deep causes , and puts forward some countermeasures and sugges-tions to improve the retailer -supplier relationship .%零供矛盾一直困扰我国流通业的发展,零售商不规范促销、零售商与供应商不公平交易屡见不鲜,有从实体经济向电子商务领域蔓延的势头。零供冲突不断,损害了消费者、零售商和供应商的利益,影响了市场秩序的正常运行。为探究零供矛盾根源、发现问题本质与规律,本文在归纳当前零供矛盾主要表现形式的基础上,重点剖析了引发零供矛盾和冲突的深层原因,提出了改善零供关系的对策建议。

  20. 国内耐药肺炎链球菌的流行现状%Current status of drug resistance of Streptococcus pneumoniae in China

    Institute of Scientific and Technical Information of China (English)

    姚开虎; 张敬仁

    2011-01-01

    Streptococcus pneumoniae is an important pathogen that causes devastating infectious diseases, such as bacterial pneumonia, otitis media and meningitis in both developed and developing countries. Due to the excessive use of antibiotics, the re sistance of pneumococcal isolates to many of the commonly used antibiotics results in fewer effective antibiotics available for treat ment. As the resistant S. pneumoniae is gradually approaching what the “superbug” is, the emergent situation demands our full at tention and efforts in seeking short-and long-term solutions. This article provides an overview of the current status of drug resis tance of S. pneumoniae and the related research in China.%肺炎链球菌可引起细菌性肺炎、中耳炎和脑膜炎等疾病,是当今发达国家和发展中国家共有的一个重要病原.由于抗生素长期的过度使用,许多肺炎链球菌菌株能够同时耐受多种常用的抗生素,使得临床可应用的有效抗生素越来越少.耐药肺炎链球菌正在朝着"超级细菌"方向发展.这种现状值得我们关注并寻求近期和长期的解决方法.本文对国内肺炎链球菌耐药现状及相关研究进行综述.

  1. Analysis of Current Problems of China's Energy Audit Team%简析我国能源审计队伍现状及存在问题

    Institute of Scientific and Technical Information of China (English)

    侯京亮; 翟国富; 苗杨; 马伟; 田东蒙

    2014-01-01

    The current situation of China's energy audit team was found out through this paper. It showed that among energy audit practitioners, energy audit professional qualification of employees was unclear, and professional and continuing education needed to be improved, and lack of regulatory mechanism also existed. There were also problems of the third-party energy audit agency. For example, reporting audit procedures was to be further standardized, and there were falsifications during the operation, and the working activity of personnel was falling down result of the unreasonable audit fee. The establishment of an independent third party auditor energy system was proposed to solve these problems.%通过调研,摸清了目前我国能源审计队伍现状。研究表明,我国能源审计从业人员存在着专业资格认定不清、专业教育和继续教育水平有待提高、审计活动监管机制仍须改进等问题;第三方能源审计机构存在着申报审核程序有待进一步规范、运行过程有弄虚作假行为、审计费用不合理工作积极性下降等问题。针对这些问题,提出了在我国建立独立第三方能源审计师制度的构想。

  2. 我国现行受贿犯罪罪名体系探究%The Charges System of China's Current Bribery Crime

    Institute of Scientific and Technical Information of China (English)

    吴雨阳

    2013-01-01

      At present ,punishing bribery crime is the most important anti-corruption work in china, in allusion to the viewpoint supported by the present criminal law academic, that the bribery crime charges system should perform unified under a development route. Discussing the present bribery crime charges system, we should considere from the subject of crime, the object of crime, the legal interest, and the application and distribution of the specific provisions to affirm the rationality of current bribery crimes charges system, analyzing the rationality of the units and natural person double subjects of crime in our country and putting forward measures for improving the bribery crime charges system. This paper argues the regulating the bribery crime in the non-state-owned units, further refining the current bribery crime charges to make the judicial practice more facilitated.%  惩治受贿犯罪是我国目前反贪腐工作的重中之重,针对目前刑法学界普遍主张的“贪污贿赂犯罪罪名体系一元化的发展路线”,在探讨现行受贿犯罪罪名体系的基础上,从犯罪主体、客体、法益保护、分则条文的适用和分布等多方面肯定我国现行受贿犯罪罪名体系的合理性,分析我国单位和自然人双重犯罪主体的可行性,并提出对我国受贿犯罪罪名体系的完善措施,主张规制非国有单位的受贿犯罪,并对现行受贿犯罪进行进一步细化,以便司法实践操作。

  3. Current Status and Improvement Strategy of Port Logistics in China%我国港口物流发展现状与改进策略的研究

    Institute of Scientific and Technical Information of China (English)

    杨耕新

    2012-01-01

    In this paper we analyzed the current status of development of port logistics in China and pointed out the major problems existing therein as well as the correspoding improvement strategies.%分析了我国港口物流发展现状,指出了存在的主要问题,并从几个方面对加强我国港口物流发展提出了改进策略.

  4. Exploring the relationship between the magnitudes of seismic events

    CERN Document Server

    Spassiani, Ilaria

    2015-01-01

    The distribution of the magnitudes of seismic events is generally assumed to be independent on past seismicity. However, by considering events in causal relation, for example mother-daughter, it seems natural to assume that the magnitude of a daughter event is conditionally dependent on the one of the corresponding mother event. In order to find experimental evidence supporting this hypothesis, we analyze different catalogs, both real and simulated, in two different ways. From each catalog, we obtain the law of triggered events' magnitude by kernel density. The results obtained show that the distribution density of triggered events' magnitude varies with the magnitude of their corresponding mother events. As the intuition suggests, an increase of mother events' magnitude induces an increase of the probability of having "high" values of triggered events' magnitude. In addition, we see a statistically significant increasing linear dependence of the magnitude means.

  5. Functional shape of the earthquake frequency-magnitude distribution and completeness magnitude

    Science.gov (United States)

    Mignan, A.

    2012-08-01

    We investigated the functional shape of the earthquake frequency-magnitude distribution (FMD) to identify its dependence on the completeness magnitude Mc. The FMD takes the form N(m) ∝ exp(-βm)q(m) where N(m) is the event number, m the magnitude, exp(-βm) the Gutenberg-Richter law and q(m) a detection function. q(m) is commonly defined as the cumulative Normal distribution to describe the gradual curvature of bulk FMDs. Recent results however suggest that this gradual curvature is due to Mc heterogeneities, meaning that the functional shape of the elemental FMD has yet to be described. We propose a detection function of the form q(m) = exp(κ(m - Mc)) for m FMD of angular shape. The two FMD models are compared in earthquake catalogs from Southern California and Nevada and in synthetic catalogs. We show that the angular FMD model better describes the elemental FMD and that the sum of elemental angular FMDs leads to the gradually curved bulk FMD. We propose an FMD shape ontology consisting of 5 categories depending on the Mc spatial distribution, from Mc constant to Mc highly heterogeneous: (I) Angular FMD, (II) Intermediary FMD, (III) Intermediary FMD with multiple maxima, (IV) Gradually curved FMD and (V) Gradually curved FMD with multiple maxima. We also demonstrate that the gradually curved FMD model overestimates Mc. This study provides new insights into earthquake detectability properties by using seismicity as a proxy and the means to accurately estimate Mc in any given volume.

  6. Reinforcer magnitude affects delay discounting and influences effects of d-amphetamine in rats.

    Science.gov (United States)

    Krebs, Christopher A; Reilly, William J; Anderson, Karen G

    2016-09-01

    Impulsive choice in humans can be altered by changing reinforcer magnitude; however, this effect has not been found in rats. Current levels of impulsive choice can also influence effects of d-amphetamine. This study used a within-subject assessment to determine if impulsive choice is sensitive to changes in reinforcer magnitude, and whether effects of d-amphetamine are related to current levels of impulsive choice. A discounting procedure in which choice was for a smaller reinforcer available immediately or a larger reinforcer available after a delay that increased within session was used. Reinforcer magnitude was manipulated between conditions and impulsive choice was quantified using area under the curve (AUC). In the Smaller-Magnitude (SM) Condition, choice was between one food pellet and three food pellets. In the Larger-Magnitude (LM) Condition, choice was between two food pellets and six food pellets. Impulsive choice was greater in the SM Condition compared to the LM Condition. Further, effects of d-amphetamine (0.1-1.8mg/kg) were related to differences in impulsive choice. d-Amphetamine increased impulsive choice in the LM Condition, but had no effect on impulsive choice in the SM Condition. Overall, these results show that impulsive choice in rats is sensitive to changes in reinforcer magnitude, and that effects of d-amphetamine are influenced by current levels of impulsive choice.

  7. Analysis on the Current Situation of Illegal Drug Advertising in China%我国药品广告管理现状及问题分析

    Institute of Scientific and Technical Information of China (English)

    杨悦; 杨世民

    2016-01-01

    Objective To reflect the current situation of drug advertising control in China,to find out the existing problems,and to pro-pose suggestions on drug advertisement control. Methods The illegal drug advertising during 2014-2015 was collected. The content analysis,secondary analysis and comparative analysis methods were adopted to evaluate the drug advertising control. Results The liter-ature research,annual number of illegal drug advertisement increased year by year. An advertisement for medicines should not in any way contain any unscientific assertions or assurances in terms of efficiency or uses. The problems like expansion of the treatment effi-ciency or curative rate still existed. Conclusion It is still an essential issue to strengthen the management of drug advertising con-trol. We suggest that the laws and regulations concerned drug advertising control should be improved;the drug advertising regulatory de-partments should be unified;the penalties for violations of the law should be aggravated;the management of publishing media should be strengthened;the supervision of illegal websites should be intensified.%目的:了解我国近年药品广告管理的现状,找出存在的问题,为加强药品广告管理提出建议。方法收集2014年至2015年违法药品广告的资料,采用文献研究、内容分析、二次分析、对比分析等研究方法探讨药品广告管理情况。结果我国药品违法广告数量增加,广告宣传内容含有不科学表示功效的断言和保证,扩大宣传治愈率或有效率等问题依然存在。结论加强药品广告管理依然是业内关注的重要问题之一。建议完善药品广告管理的法规建设,统一药品广告审批监管部门,加大对违法行为的处罚力度,加强对发布媒体的管理,加大对违法网站的监管。

  8. Current status of protection of forest genetic resources in China%中国林木遗传资源保护现状分析

    Institute of Scientific and Technical Information of China (English)

    赵罕; 宗亦臣; 郑勇奇

    2014-01-01

    Complex and diverse geographical conditions formed unique geographical areas,and also gave birth to many forest types and rich forest genetic resources. As a basis for strategic resources of the country,China has more than 8 000 kinds of woody plants,including 1 000 kinds of economically important species,seven endemic families,239 genera and about 1 100 unique endemics. For comprehensive understanding and analysis of forest genetic resources conservation sta-tus,in-situ,ex-situ,and facilitiesconservation status,damage and loss status of resource and related laws and regulations were summarized,current problems were analyzed,and preliminary proposal were put for more rational and effective pro-tection of forest genetic resources.%复杂多样的地理条件形成了各具特色的地理区域,同时也孕育了我国众多的森林类型和极为丰富的林木遗传资源。作为国家的基础性战略资源,我国拥有木本植物8000多种,其中具有重要经济价值的树种约1000种,同时具有7个特有科、239个特有属和约1100个特有种。为对我国林木遗传资源保存状况进行全面的了解和分析,对我国林木遗传资源的原地、异地及设施保存状况,资源破坏、流失状况及相关的法律法规进行了总结,对目前存在的问题进行了分析,并提出了初步的建议,为合理、有效的保护林木遗传资源提供了参考。

  9. 中国放射性药物的现状与展望%Current Status and Prospects of Radiopharmaceuticals in China

    Institute of Scientific and Technical Information of China (English)

    贾红梅; 刘伯里

    2011-01-01

    放射性药物不仅可以作为有效的诊断和治疗手段,而且结合单光子断层扫描仪(SPECT)或正电子断层扫描仪(PET),还可以在分子水平上直接研究它们在正常人体(活体)内的功能和代谢过程,实现人体内生理和病理过程的快速、无损和实时成像,为真正意义上的早诊断、早治疗提供新方法和新手段,为预防医学、转化医学、个性化医学的实现提供可能的途径.本文概述了体内放射性药物的最新进展,分析了我国放射性药物的研究现状,提出大力加强医用放射性核素的研制、加强基础放射性药物化学研究、系统开展受体分子显像剂的研究以及开展多模式多功能复合分子探针的研究等建议.%Radiopharmaceuticals could not only serve as effective diagnostic and therapeutic tools in human diseases, but also allow the assessment of metabolism and functional processes by providing quick, non-invasive and real-time visualization of physiological and pathological processes in the living humans at the molecular level together with PET (positron e-mission tomography) and SPECT (single photon emission computed tomography) imaging modalities. They could provide new methods and new approaches of truly early diagnosis and therapy and possible pathways for the preventative medicine, translational medicine and personalized medicine. The present review provides an overview of current status of in vivo radiopharmaceuticals in China. Moreover, some prospects of research and development of radiopharmaceuticals in the near future was discussed. The addressed future trends include the following aspects. (1) Production of medical radioisotopes including 99Mo, 131I, 188/186Re and 123I. (2) Investigation on the basic radiopharmaceutical chemistry. (3) Development of receptor-based imaging agents. (4) Development of multi-modality imaging probes.

  10. 我国家庭养老观念的现状及变化趋势%The Current Situation and Tendency of Family Support Perception in China

    Institute of Scientific and Technical Information of China (English)

    纪竞垚

    2016-01-01

    利用2014年中国老年社会追踪调查(CLASS)数据作为支持,从老年人对家庭养老模式和具体的家庭养老方式的态度和看法这两个维度,阐释我国家庭养老观念的现状和变化。研究发现:家庭养老模式方面,孝观念和孝行标准在当代社会的文化氛围下有着新的表现形式,今天的老年人更加注重子女对自己日常生活的照料;在具体的家庭养老方式方面,对于“谁来养老”,老年人尤其是城市、低龄老年人的“养儿防老”观念正在逐渐淡化,对于“在哪养老”,从总体上看,无论是老年人还是其家庭成员,大都希望居家养老。%By using the data from Chinese Longitudinal Aging Social Survey (CLASS) which is directed by Renmin University of China, this paper interprets the current situation and tendency of family support perception from 2 dimensions:family support pattern and the action style of family support. The paper has found that filial piety perception is changing in recent days and the old persons are more emphasis on children’s care for them in family support pattern aspect. Furthermore, in the aspect of family support action style, the perspective for“raise children to provide against old age”is diminishing especially for the urban and low age old people. Moreover, both old people and their family members are inclined that the old are expected to be at home when they are old.

  11. Symbolic Magnitude Modulates Perceptual Strength in Binocular Rivalry

    Science.gov (United States)

    Paffen, Chris L. E.; Plukaard, Sarah; Kanai, Ryota

    2011-01-01

    Basic aspects of magnitude (such as luminance contrast) are directly represented by sensory representations in early visual areas. However, it is unclear how symbolic magnitudes (such as Arabic numerals) are represented in the brain. Here we show that symbolic magnitude affects binocular rivalry: perceptual dominance of numbers and objects of…

  12. 中国HIV抗体检测策略的应用评价%Evaluation on HIV antibody testing strategy currently used in China

    Institute of Scientific and Technical Information of China (English)

    杨晓莉; 鲍作义; 刘永健; 耿海山; 郝钦芳; 王莉; 凌爱琴; 王海燕; 李敬云

    2010-01-01

    目的 评价中国HIV抗体检测策略在不同人群应用的效果和收益.方法 (1)收集103 133份一般人群(临床就诊病例、献血员、新兵)标本、1276份HIV感染高危人群(吸毒人群、HIV感染者的配偶)标本、2323份生化和免疫指标异常的标本,用现行HIV抗体检测策略进行检测.(2)对2002-2008年武警总医院90 289人次临床病例HIV抗体检测数据进行回顾性分析;对3个省级确认中心实验室过去3~5年确认检测的结果进行回顾性分析.结果 (1)筛查试验的收益在高危人群与一般人群显著不同,高危人群筛查阳性者中HIV抗体真阳性的比例约为50%,显著高于一般人群;主要针对一般人群的确认实验室筛查阳性标本中真阳性的比例为19.58%,显著低于主要针对高危人群的确认实验室.(2)2002-2008年临床HIV抗体检测,首次筛查阳性的真阳性率由3.7%上升到16.0%,同时,复检效率由92.6%下降为61.5%.(3)常见的生化和免疫异常未增加HIV抗体检测的非特异反应.结论 HIV抗体筛查阳性预示HIV感染的意义在不同人群有显著差别,高危人群显著高于一般人群.随着近年来HIV抗体检测试剂质量的改进和实验室质量控制水平的提高,HIV抗体首次筛查的准确性大幅度提高,而复检的效率显著下降.应考虑对不同人群采取不同的检测程序.%Objective To evaluate the yield of HIV antibody testing strategy currently used on different populations, in China. Methods (1) The following samples were collected and tested according to the currently used HIV antibody testing strategy in China. 103 133 samples from the general populations (outpatients, new recruits and blood donors), 1276 people under high risk (spouses of the HIV infected individuals, intravenous drug users) and 2323 biochemical or immunological abnormal samples. (2) Retrospective analysis was done on data from the HIV testing among outpatients in General Hospital of People's Armed

  13. 中国行为医学教学溯源与发展现状%The development and current situation of behavioral medicine education in China

    Institute of Scientific and Technical Information of China (English)

    白波; 吉峰; 冯学泉; 李诺; 李妮娜; 杨艳杰; 刘新民; 杨志寅

    2016-01-01

    采用问卷调查、电话访谈和网络查询相结合的方式调查31所高等医学院校行为医学教学开展情况.国内行为医学最早在医学院校开设《行为医学》课程的是原湖南医学院(现中南大学湘雅医学院),随后有多所大学相继开设行为医学课程.目前国内开设《行为医学》课程的高等院校有济宁医学院、中南大学湘雅医学院、哈尔滨医科大学等20余所高校.主要为本专科生开设,部分院校为研究生及留学生开课,开课专业主要集中在精神病与精神卫生和心理学两个专业,开课学时数从10学时到60学时不等.除了济宁医学院和湘雅医学院设立行为医学教研室外,大部分院校的《行为医学》课程由心理学教研室或医学心理学教研室承担.《行为医学》课程教学内容存在多样性和不统一性.随着开设行为医学课程的高等院校越来越多,行为医学规划教材和专著也蓬勃发展.目前,国内行为医学教学主要存在着课程定位、课程设置与教学研究、行为医学继续教育和科普工作、行为医学专业人才培养等方面的问题.%Questionnaire surveys,telephone interviews and network research were carried out concerning behavioral medicine education in 31 medical colleges and universities in China.The former Hunan Medical College (now Xiangya School of Medicine,Central South University) was the first to offer behavioral medicine courses,followed by an increasing number of medical intuitions of higher education.Currently,over 20 medical colleges and universities including Jining Medical University,Xiangya School of Medicine of Central South University,Harbin Medical University and so on provide behavioral medicine courses,mostly for undergraduates while some schools also for postgraduates and international students,majoring in psychiatry and mental health and psychology.The curriculum duration ranges from 10 to 60 hours.Behavioral medicine courses

  14. Gaze direction affects the magnitude of face identity aftereffects.

    Science.gov (United States)

    Kloth, Nadine; Jeffery, Linda; Rhodes, Gillian

    2015-01-01

    The face perception system partly owes its efficiency to adaptive mechanisms that constantly recalibrate face coding to our current diet of faces. Moreover, faces that are better attended produce more adaptation. Here, we investigated whether the social cues conveyed by a face can influence the amount of adaptation that face induces. We compared the magnitude of face identity aftereffects induced by adaptors with direct and averted gazes. We reasoned that faces conveying direct gaze may be more engaging and better attended and thus produce larger aftereffects than those with averted gaze. Using an adaptation duration of 5 s, we found that aftereffects for adaptors with direct and averted gazes did not differ (Experiment 1). However, when processing demands were increased by reducing adaptation duration to 1 s, we found that gaze direction did affect the magnitude of the aftereffect, but in an unexpected direction: Aftereffects were larger for adaptors with averted rather than direct gaze (Experiment 2). Eye tracking revealed that differences in looking time to the faces between the two gaze directions could not account for these findings. Subsequent ratings of the stimuli (Experiment 3) showed that adaptors with averted gaze were actually perceived as more expressive and interesting than adaptors with direct gaze. Therefore it appears that the averted-gaze faces were more engaging and better attended, leading to larger aftereffects. Overall, our results suggest that naturally occurring facial signals can modulate the adaptive impact a face exerts on our perceptual system. Specifically, the faces that we perceive as most interesting also appear to calibrate the organization of our perceptual system most strongly. PMID:25761338

  15. Current situation and counter-measures of the development of dryland farming in China%中国旱地农业的发展现状及措施

    Institute of Scientific and Technical Information of China (English)

    赵长星; 山仑; 邓西平; 赵丽英; 张煜; 王周锋

    2004-01-01

    水资源紧缺已成为我国经济发展和环境建设的制约因素.要注视发展节水高效灌溉农业及旱地农业.该文论述了我国旱地农业的发展现状及其存在的问题,明确了旱地农业在节水农业中的地位与作用,并认为我国旱地农业的可持续发展应以提高用水效率作为农业节水的核心,提高旱地作物生产力为目标,服务于旱地农业地区社会经济、食物、资源、环境的可持续发展.最后针对我国旱地农业的特点,提出了工程节水及生物节水等若干技术措施,探讨了未来旱地农业高效用水技术的发展前景.%China has been facing serious water shortage problems that caused great economic and environmental losses. The attention should be paid and the development of China's dryland farming should be emphasized on. So it is important to develop the new technologies and practices and to search the new joint-point between improving dryland productivity and protection of the ecological environment. This paper mainly introduced current situation of China's dryland farming development and discussed major practices. In the future, the research and development should focus on how to generalize the practices according to the situation of dryland farming of China, which will benefit the sustainable agricultural development of the semiarid and arid regions in China.

  16. 中国髋、膝关节置换的现状及展望%The current status and future perspective of hip and knee arthroplasty in China

    Institute of Scientific and Technical Information of China (English)

    裴福兴

    2012-01-01

    In this review, we have been elected to include reviews on the following points, a: The current status of primary total hip arthroplasty (THA) and total knee arthroplasty (TKA). Total joint arthroplasty volume is projected to continue increasing during the past several years in China. The most commonly used combination for THA was metal-on-polyethylene. However, the number of the choices of a hard-on-hard, metal-on-metal or ceramic-on-ceramic bearing was increasing. The majority of the hard-on-hard bearing surface was used in younger patients. Hip resurfacing arthroplasty also has gained popularity as an alternative to conventional THA in selected patients. In TKA, the posteriorly stabilized implants was the most commonly used prosthesis in China. High-flexion and mobile bearing designs were also used during the past several years, b: The current status of hip and knee revision surgery. Most causes of hip revision in China were infection, instability, and loosening. For knee revision, the most common cause was infection. Revision surgeries are usually performed in large, teaching hospitals in big cities. Two-stage revision was the main strategy for revision joint arthroplasty. C: The current status of minimally invasive surgery and navigation surgery. Minimally invasive surgery and navigation assisted arthroplasty were also performed in some teaching hospitals in China. The short-term results were better, however, the follow-up was still needed for mid to long-term effect, d: The current status of pain management and prophylaxis for venous thromboembolism. Over the last decade, perioperative protocols have emerged to reduce postoperative pain and to improve early function. These protocols have included preemptive pain management, intraoperative medications, periarticular injections, and postoperative avoidance of parenteral narcotics. Venous thromboembolism is a severe complication. The most preferred recommendation, by the Chinese Orthopaedic Association (COA), is

  17. CHINA'S GAS MARKET TODAY

    Institute of Scientific and Technical Information of China (English)

    Chu Haihong

    2005-01-01

    @@ According to JPMorgan's review 2003 of China's gas market,China's household gas price was one of the lowest in the world, 20% below the global average. Despite the increase in recent years, China's domestic gas price is still relatively low in the global context. It is safe to say that the low gas price is one of the keys attracting keen investments currently from overseas and domestic private capitals.

  18. Current status of parenteral nutrition and enteral nutrition application: an assessment of nutritional prescriptions from 59 hospitals in the People’s Republic of China

    Directory of Open Access Journals (Sweden)

    Han G

    2015-02-01

    Full Text Available Gang Han, Zhenwei Yu, Ke Ma Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, People’s Republic of China Purpose: The aim of the study reported here was to assess the use of parenteral nutrition (PN and enteral nutrition (EN, and the prevalence of PN and EN formulas, in the People’s Republic of China. Methods: Fifty-nine hospitals in the People’s Republic of China participated in a nutrition survey. The resulting information on nutritional support was analyzed. Results: We received 379,584 nutritional-support prescriptions over 40 days in 2013. PN provided approximately 63.2% and EN provided approximately 36.8% of nitrogen intake. PN provided 63.5% and EN provided 36.5% of lipid intake. There were obvious differences in nitrogen and lipid intake between PN and EN in different regions, departments, and diseases. The percentage of nourishment provided by PN in different regions was highest in Chengdu, followed by the Beijing, Guangzhou, and Hangzhou areas. The percentage of nourishment provided by PN in different departments was highest in general surgery, followed by gastroenterology and the intensive care unit. The percentage of nourishment provided by PN in different diseases/conditions was highest in acute pancreatitis, followed by cancer, and burns. The main source of nitrogen in PN was balanced amino-acid preparations, and in EN, it was protein. The main source of lipids in PN was long- and medium-chain triglyceride lipid emulsion injection. Conclusion: Despite recent improvements in the application of nutritional support in the People’s Republic of China, a much higher percentage of nitrogen and lipids is delivered through PN than through EN. Furthermore, there are marked regional, departmental, and disease-based differences in the selection of PN versus EN. The rationale for use of nutritional support needs to be improved. Keywords: nutrition survey, prescription, nutritional support, amino

  19. Relationship between the magnitude of singular value and nonlinear stability

    Institute of Scientific and Technical Information of China (English)

    穆穆; 郭欢; 王佳峰; 李勇

    2001-01-01

    The relationship between the magnitude of singular value and nonlinear stability or instability of the basic flow is investigated. The results show that there is a good corresponding relationship between them. The magnitude of singular value decreases as the stability (or instability) of the basic flow increases (or decreases). In the stable case, the magnitude of the maximum singular value is much smaller than in the unstable case.

  20. Current situation and reflection on rehabilitation after burn injury in China%中国烧伤康复治疗的现状与思考

    Institute of Scientific and Technical Information of China (English)

    吴军; 陈建

    2013-01-01

    After over 50 years'development,the modern burn care system of China has made remarkable progress,however,we still lack ample attention to functional rehabilitation and quality of life of burn patients recovering from burn injury.The burn rehabilitation in China is still in juvenile stage,but it is really encouraging that more and more burn care facilities are paying attention to it.To further promote the development of burn rehabilitation in China,more emphasis must be stressed on the formation of multidisciplinary team in our burn care system,the concept of early and integral rehabilitation should be promoted,and therapeutic regimens and research work on function and aesthetics related body parts like hand and face should be emphasized.Moreover,we should also carry out rehabilitation on pediatric burn patients and promulgate the idea of burn rehabilitation in the society at large with the purpose of seeking supports for burn rehabilitation from all sectors of the society.

  1. Heuristic and computer calculations for the magnitude of metric spaces

    CERN Document Server

    Willerton, Simon

    2009-01-01

    The notion of the magnitude of a compact metric space was considered in arXiv:0908.1582 with Tom Leinster, where the magnitude was calculated for line segments, circles and Cantor sets. In this paper more evidence is presented for a conjectured relationship with a geometric measure theoretic valuation. Firstly, a heuristic is given for deriving this valuation by considering 'large' subspaces of Euclidean space and, secondly, numerical approximations to the magnitude are calculated for squares, disks, cubes, annuli, tori and Sierpinski gaskets. The valuation is seen to be very close to the magnitude for the convex spaces considered and is seen to be 'asymptotically' close for some other spaces.

  2. Dilemmas for China: Energy, economy and environment

    OpenAIRE

    Tang, Xu; Benjamin C. McLellan; Snowden, Simon; Zhang, Baosheng; Höök, Mikael

    2015-01-01

    China's current national policies promote high levels of economic growth, transforming China into a "world factory", but at a high cost in terms of energy and the environment. At the same time, this growth and transformation also forms the backbone of China's economy, underpinning social stability. China faces a dilemma to reconcile its economy, energy system and environmental security. Each aspect of this triad is discussed in this study to illuminate the challenges faced by China, and China...

  3. Introduction:Theory and Practice in China's Current Electoral Svstem Reforms%导言:中国选举制度改革的理论和实践

    Institute of Scientific and Technical Information of China (English)

    蔡定剑

    2004-01-01

    @@ This corpus of essays and articles is devoted to current institutional reform of China's electoral system. Their authors are nationally recognized scholars and researchers, and include some of the most authoritative, well informed specialists in the field. They include suffrage experts exclusively engaged in electoral legislation at the NPC Standing Committee, state officials officiating over democratic elections at grassroots constituencies, professors in the field and research professionals working for the universities or institutions. They have for a long time been training their attention on promoting and studying the existing electoral system. Their works and ideas offer us a direct, lively and vigorous as well as comprehensive exposition of the basics in this field.

  4. Discussions on Current Situation and Development Trend of Building Energy Conservation in China%探讨我国建筑节能现状及未来发展趋势

    Institute of Scientific and Technical Information of China (English)

    申钢

    2013-01-01

    Building energy conservation has become a popular trend of modern building industry. This article studies the current situation of building energy conservation in China and analyzes its development trend in the future.%建筑行业开展节能工作已是现代建筑行业发展的一大趋势。本文对我国的建筑节能的现状进行研究,并分析其未来的发展趋势。

  5. 中国苜蓿育种的历史、现状与发展趋势%The History, Current Situation and Development of Alfalfa Breeding in China

    Institute of Scientific and Technical Information of China (English)

    杨青川; 孙彦

    2011-01-01

    The history and current situation of alfalfa breeding in China were introduced. The methods for alfalfa breeding and problems in alfalfa breeding were elaborated. The goal and development direction of alfalfa breeding were put forward.%介绍了中国苜蓿育种的历史、现状,阐述了苜蓿育种的方法和目前中国苜蓿育种中存在的问题,提出了今后苜蓿育种发展的方向与目标.

  6. 当前世界经济形势与中国战略选择%The Current Global Economic Situation and China's Strategic Choice

    Institute of Scientific and Technical Information of China (English)

    陈文玲

    2016-01-01

    当前,世界经济总体复苏依旧乏力缓慢,以"三低""三高""三个失衡"为特征的世界经济低速增长的"新常态"不会发生根本改变,但世界经济继续分化,货币政策加剧分化,国际贸易格局日益分化,大宗商品市场价格在跌宕起伏中分化,全球跨境电子商务蓬勃发展.随着我国综合国力的不断增强,随着我国与世界新型互动态势的日益明显,面对新的国际形势,为构建面向未来的全球开放型经济体系,必须进行新的战略选择,一要加快推进人民币国际化战略,重构国际货币体系;二要以人民币国际化推动国际货币体系改革;三要全面推进自由贸易区战略,构建自由贸易区网络体系;四要加快产业结构调整与升级,重构全球价值链体系;五要加快实施创新驱动战略,形成创新驱动型经济体系.%At present,the trend of economic recovery is still weak and slow;the"new normal"of slow world economic growth,which takes the"Three Low","Three High"and"Three Imbalance"as the characteristics,will not be fundamentally changed;differentiations in world economic growth,monetary policies,global trade patterns,and commodity prices will be highlighted;and the development of global cross-border e-commerce will be blooming. With the increasingly enhanced comprehensive national strength of China,the noticeable new interactions between China and other countries,and the new international situation,to establish the future open strategic system and make the new strategic choice,China should,first, accelerate the strategy of RMB internationalization and rebuild the international monetary system;second,China should promote the reform of international monetary system with the help of RMB internationalization;third,China should fully promote the strategy of Free Trade Zone (FTZ) and establish the network system of FTZ;fourth,China should accelerate the industrial restructuring and strategic upgrade and rebuild the global value

  7. On the frequency-magnitude distribution of converging boundaries

    Science.gov (United States)

    Marzocchi, W.; Laura, S.; Heuret, A.; Funiciello, F.

    2011-12-01

    The occurrence of the last mega-thrust earthquake in Japan has clearly remarked the high risk posed to society by such events in terms of social and economic losses even at large spatial scale. The primary component for a balanced and objective mitigation of the impact of these earthquakes is the correct forecast of where such kind of events may occur in the future. To date, there is a wide range of opinions about where mega-thrust earthquakes can occur. Here, we aim at presenting some detailed statistical analysis of a database of worldwide interplate earthquakes occurring at current subduction zones. The database has been recently published in the framework of the EURYI Project 'Convergent margins and seismogenesis: defining the risk of great earthquakes by using statistical data and modelling', and it provides a unique opportunity to explore in detail the seismogenic process in subducting lithosphere. In particular, the statistical analysis of this database allows us to explore many interesting scientific issues such as the existence of different frequency-magnitude distributions across the trenches, the quantitative characterization of subduction zones that are able to produce more likely mega-thrust earthquakes, the prominent features that characterize converging boundaries with different seismic activity and so on. Besides the scientific importance, such issues may lead to improve our mega-thrust earthquake forecasting capability.

  8. China's carbon flow: 2008-2012

    OpenAIRE

    Huanan Li; Yi-Ming Wei; Zhi-Fu Mi

    2014-01-01

    As the world's largest CO2 emitter, China's CO2 emissions have become one of the most popular issues concerned by domestic and foreign researchers. Therefore, analysis of the current status of China's carbon emissions is very important. After drawing a chart of China's carbon flow in 2012, based on the IPCC carbon emission inventory method and China's energy balance table, this paper gives a detailed description of the current status of China's carbon flow and compares the changing characteri...

  9. Heat roadmap China

    DEFF Research Database (Denmark)

    Xiong, Weiming; Wang, Yu; Mathiesen, Brian Vad;

    2015-01-01

    District heating is regarded as a key element of energy saving actions in the Chinese national energy strategy, while space heating in China is currently still dominated by coal boilers. However, there is no existing quantitative study to analyse the future heat strategy for China. Therefore...

  10. Educational Technology in China

    Science.gov (United States)

    Meifeng, Liu; Jinjiao, Lv; Cui, Kang

    2010-01-01

    This paper elaborates the two different academic views of the identity of educational technology in China at the current time--advanced-technology-oriented cognition, known as Electrifying Education, and problem-solving-oriented cognition, known as Educational Technology. It addresses five main modes of educational technology in China: as a…

  11. Review of the magnitude of folate and vitamin B12 deficiencies worldwide

    Science.gov (United States)

    Human deficiencies of folate and vitamin B12 result in adverse effects which may be of public health significance, but the magnitude of these deficiencies is unknown. Therefore, we examine the prevalence data currently available, assess global coverage of surveys, determine the frequency with which...

  12. Some Effects of Magnitude of Reinforcement on Persistence of Responding

    Science.gov (United States)

    McComas, Jennifer J.; Hartman, Ellie C.; Jimenez, Angel

    2008-01-01

    The influence of magnitude of reinforcement was examined on both response rate and behavioral persistence. During Phase 1, a multiple schedule of concurrent reinforcement was implemented in which reinforcement for one response option was held constant at VI 30 s across both components, while magnitude of reinforcement for the other response option…

  13. Magnitude Knowledge: The Common Core of Numerical Development

    Science.gov (United States)

    Siegler, Robert S.

    2016-01-01

    The integrated theory of numerical development posits that a central theme of numerical development from infancy to adulthood is progressive broadening of the types and ranges of numbers whose magnitudes are accurately represented. The process includes four overlapping trends: 1) representing increasingly precisely the magnitudes of non-symbolic…

  14. Reinforcement Magnitude: An Evaluation of Preference and Reinforcer Efficacy

    Science.gov (United States)

    Trosclair-Lasserre, Nicole M.; Lerman, Dorothea C.; Call, Nathan A.; Addison, Laura R.; Kodak, Tiffany

    2008-01-01

    Consideration of reinforcer magnitude may be important for maximizing the efficacy of treatment for problem behavior. Nonetheless, relatively little is known about children's preferences for different magnitudes of social reinforcement or the extent to which preference is related to differences in reinforcer efficacy. The purpose of the current…

  15. China-Pakistan Energy Cooperation:Background, Current Situation and Prospect%中巴能源合作:背景·现状·前景

    Institute of Scientific and Technical Information of China (English)

    徐云龙

    2015-01-01

    China and Pakistan have developed into all-day,all-round strategic cooperative partners,and have made notable progress in various fields,especially in the field of energy. China-Pakistan energy cooperation has two favourable condi-tions strategy cooperation and Pakistan’s geo-strategic position,but due to Pakistan’s poor domestic security and infras-tructure,there exist challenges to the cooperation between the two nations. At present,China and Pakistan cooperate mainly in hydropower,nuclear power,coal-gen and new energies(wind power and solar energy)and so on. Due to the requirements of China-Pakistan’s strategic interests,particularly the requirements of common energy security interests,China-Pakistan’s ener-gy channel construction should be strengthened in the future since the two countries have actively promoted energy cooperation in recent years and the cooperation in the fields of electricity,nuclear power is mature now;the two countries are actively preparing for the energy channel construction and are promoting the energy strategy;Gwadar Port is a favourable factor for energy channel construction. The energy strategy channel construction would not only ease the pressure on Pakistan’s economic development,but also boost economic development in Western China.%中巴关系已发展成为全天候、全方位的战略合作伙伴关系,在各个领域都取得了显著的发展,尤其是在能源领域。中巴能源领域合作具有两国战略推动和巴基斯坦所具有的地缘战略优势地位等有利条件,但也由于其国内安全和基础设施差等问题而让中巴合作存在挑战。目前,中巴能源合作主要是在水电、核电、煤电以及新能源(风力发电和太阳能)等领域。由于中巴两国战略利益的要求,特别是共同能源安全利益的需要,未来应加强中巴能源通道建设,其可行性在于:近年来两国积极推动能源合作,在电力、核能领域的合作日

  16. 中日农产品贸易的现状与融合%The Current Situation and Fusion of Agricultural Trade between China and Japan

    Institute of Scientific and Technical Information of China (English)

    姚丹丹

    2014-01-01

    中国和日本经贸关系非常紧密。中日农产品由于地缘、经济、人口等因素,在双边贸易中占据着重要的地位。但是最近几年,中日的农产品贸易出现了一系列的问题,这既有中国农产品自身品质差,出口结构单一等问题,也存在日本通过各种手段阻碍中日农产品贸易的正常进行的问题。同时更受到全球大环境的影响,金融危机、中日紧张的政治局面都在不同程度上影响着中日农产品贸易的进行。但是由于历史、地理位置、消费习惯等原因,中日两国农产品贸易存在相互融合的基础。为继续增进两国的农产品贸易,中国应积极改善农产品的品质,并逐步推进出口结构的优化,而日本就应该遵循世贸组织的规定,撤销各种贸易壁垒,在相互信任的基础上推进中日两国农产品贸易的健康发展。%China and Japan are very close economic and trade relations. Because of the geographic, economic, de-mographic factors, China′s agricultural products occupies an important position in bilateral trade. But in recent years, there is a series of problems in China-Japan trade in agricultural products, which is not only because of China′s prob-lems which are the poor quality of agricultural products and the single export structure and other issues, and Japan′s problems which to obstruct the normal agricultural trade by all means, but also the impact of the global environment, the financial crisis, and the tense political situation between China and Japan. However, due to historical, geographical location, spending habits and other reasons, the foundation of trade fusion exists in agricultural products between China and Japan. To promote agricultural trade between the two countries, China should actively improve the quality of agri-cultural products, and gradually promote the optimization of export structure, while Japan should follow the provisions of the WTO

  17. 中国紫菜养殖业的发展现状研究%Analysis of Development Process and Current Situation of China Laver Aquaculture

    Institute of Scientific and Technical Information of China (English)

    李博

    2012-01-01

    紫菜养殖是中国水产养殖业中的代表产业之一。从20世纪70年代开始通过引进外资,开发新品种,创新养殖技术,推动出口,加强协会组织建设等一系列举措,经过30多年的发展,紫菜养殖产业逐步趋于成熟,中国已经成为世界有数的紫菜养殖及出口大国。但是,分析研究发现紫菜养殖业快速发展的同时,在高效率生产及稳定供给、原藻质量保证、市场开发、行业协会建设以及政府管理投入方面仍存在着一些亟待解决的问题。因此,针对这些问题制定相应的措施政策对中国紫菜养殖业的可持续发展有着重要意义。%Laver aquaculture is a representative of China aquaculture industries. From the 1970s, through a series of measures such as, the introduction of foreign investment, developing new products, innovative farming techniques, promotion exports, strengthening of the construction of associations, abd China Laver aquaculture gradually matured. After' thirty years of development, China,is now one of the few countries in the world exports and seaweed' aquaculture. However, by the analysis, it could be found that the rapid development of seaweed aquaculture while, high efficiency in production and a stable supply, quality assurance of raw seaweed, marketing development, construction industry association and government investment there were still some problems to be solved. Therefore, for these issues, to develop appropriate policy measures to solve laver aquaculture issues in China has an important significance for sustainable development.

  18. The current state of the financial sector and the regulatory framework in Asian economies: The case of the People's Republik of China

    OpenAIRE

    Ping, Luo

    2011-01-01

    Reform of financial regulation is a priority on the international agenda. At the call of the Group of Twenty Finance Ministers and Central Bank Governors (G-20), a number of new international standards have been issued, most notably Basel III. As a member of the G-20, the Financial Stability Board (FSB), and the Basel Committee on Banking Supervision, the People's Republic of China (PRC) is now on a faster track in adopting international standards. However, the key issue for the PRC - as well...

  19. GRID-CONNECTED CONVERTER CONTROL STRATEGY BASED ON RELATIONSHIP BETWEEN MAGNITUDE AND PHASE OF SYSTEM VOLTAGE

    OpenAIRE

    Shansheng Feng

    2015-01-01

    Grid-connected converter is an important power interface between the DC bus of renewable energy power system and public grid. By virtue of vector relation of grid voltage, converter voltage and line impedance voltage, realtime control of active current and reactive current injected into the grid is realized. The simulation results show that grid-connected converter based on relationship between magnitude and phase of system voltage can flexibly regulate active power and reactive p...

  20. Quasi-real time inversion method of three-dimensional epicenter coordinate, trigger time, and magnitude based on CORS

    Science.gov (United States)

    Xiao, Dongsheng; Chang, Ming; Su, Yong; Hu, Qijun; Yu, Bing

    2016-09-01

    This study explores the quasi-real time inversion principle and precision estimation of three-dimensional coordinates of the epicenter, trigger time and magnitude of earthquakes with the aim to improve traditional methods, which are flawed due to missing information or distortion in the seismograph records. The epicenter, trigger time and magnitude from the Lushan earthquake are inverted and analyzed based on high-frequency GNSS data. The inversion results achieved a high precision, which are consistent with the data published by the China Earthquake Administration. Moreover, it has been proven that the inversion method has good theoretical value and excellent application prospects.

  1. SCIENCE IN CHINA (SCIENTIA SINICA)

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    Science in China is a comprehensive academic journal of natural sciences sponsored by the Chinese Academy ofSciences. The primary purpose is to provide regulaf, rapid and authoritative reviews of current importantdevelopments in scientific research in China for scientific workers in China and other countries. The contents areselected by an extensive editorial committee which is composed of the most highly esteemed scientists in China

  2. SCIENCE IN CHINA (SCIENTIA SINICA)

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    Science in China is a comprehensive academic journal of natural sciences sponsored by the Chinese Academy ofSciences. The primary purpose is to provide regular, rapid and authoritative reviews of current importantdevelopments in scientific research in China for scientific workers in China and other countries. The contents areselected by an extensive editorial committee which is composed of the most highly esteemed scientists in China

  3. SCIENCE IN CHINA (SCIENTIA SINICA)

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Science in China is a comprehensive academic journal of natural sciences sponsored by the Chinese Academy of Sciences. The primary purpose is to provide regular, rapid and authoritative reviews of current important developments in scientific research in China for scientific workers in China and other countries. The contents are selected by an extensive editorial committee which is composed of the most highly esteemed scientists in China

  4. SCIENCE IN CHINA (SCIENTIA SINICA)

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    Science in China is a comprehensive academic journal of natural sciences sponsored by the Chinese Academy ofSciences. The primary purpose is to provide regulap rapid and authoritative reviews of current importantdevelopments in scientific research in China for scientific workers in China and other countries. The contents areselected by an extensive editorial committee which is composed of the most highly esteemed scientists in China

  5. A unitary or multiple representations of numerical magnitude? – The case of structure in symbolic and non-symbolic quantities

    OpenAIRE

    KorbinianMoeller; EliseKlein; RoiCohen Kadosh

    2012-01-01

    Currently, there is a controversial debate on whether there is an abstract representation of number magnitude, multiple different ones or multiple different ones that project onto a unitary representation. The current study aimed at evaluating this issue by means of a magnitude comparison task involving Arabic numbers and structured as well as unstructured non-symbolic patterns of squares. In particular, we were interested whether a specific numerical effect, the unit-decade co...

  6. A Unitary or Multiple Representations of Numerical Magnitude? – the Case of Structure in Symbolic and Non-Symbolic Quantities

    OpenAIRE

    Moeller, Korbinian; Klein, Elise; Nuerk, Hans-Christoph; Cohen Kadosh, Roi

    2012-01-01

    Currently, there is a controversial debate on whether there is an abstract representation of number magnitude, multiple different ones, or multiple different ones that project onto a unitary representation. The current study aimed at evaluating this issue by means of a magnitude comparison task involving Arabic numbers and structured as well as unstructured non-symbolic patterns of squares. In particular, we were interested whether a specific numerical effect, the unit-decade compatibility ef...

  7. Analysis on Current Laws and Regulations of Medical Device Clinical Trial in China%对我国现阶段医疗器械临床试验法规热点的解读

    Institute of Scientific and Technical Information of China (English)

    王悦; 李天萍; 梁宁霞

    2014-01-01

    A series of laws and regulations are the essential legal requirement in the field of clinical trial of medical device currently in China, especial y the Provision for Clinical Trial of Medical Device. On the basis of current situation of medical device clinical trial, systemic analysis on the hot spot topics in the regulations was conducted to explore the way of improving the control system of clinical trial of medical device in China, which wil provide the reference for medical device industry and the investigators of the clinical trial of medical device.%《医疗器械临床试验规定》等一系列法规是目前我国进行医疗器械临床试验的主要法律依据。该文基于我国医疗器械临床研究的现状,对这些法规中若干热点问题加以解读和剖析,旨在探索完善我国医疗器械临床试验监管体系的途径,为医疗器械业内人士及医疗器械临床试验的研究者和管理者提供参考。

  8. 我国应急物流发展现状及问题对策研究%Study on the Current Situation Problems and Countermeasures of Emergency Logistics in China

    Institute of Scientific and Technical Information of China (English)

    张旭; 郑瑞巧

    2014-01-01

    文中通过应急物流与普通物流之间的全面比较,简明地阐述了应急物流的定义和特征,并结合近年来我国应急物流在应对突发性灾害事件中的应用实例和管理经验,深入地了解了我国应急物流的发展现状,然后比较全面地剖析了我国应急物流目前所存在的问题,最后在总结国外经验的基础上针对我国应急物流所存在的问题提出了相应的解决对策。%By comprehensively comparing emergency logistics with general logistics,the definition and characteristics of emergency logistics were briefly discussed.Based on the sudden disaster events that the emergency logistics was in response to and management experience in recent years and understanding the current situation of the development of emergency logistics in China,the current problems of emergency logistics was comprehensively analyzed.Finally,on the basis of summarizing the foreign experience,some corresponding countermeasures were put forward for emergency logistics problems in China.

  9. Cause and Countermeasure of China's Current Inflation%当前我国通货膨胀成因及其对策

    Institute of Scientific and Technical Information of China (English)

    梅艳

    2013-01-01

    In response to the international financial crisis,China implemented a trillion yuan stimulus.In a lot of the money supply and credit expansion in the context of the market excess liquidity injected,resulting in a significant inflationary expectations.Inflation in China will occur together by a variety of factors determined.In this paper,from the recent years,inflation and so the analysis to explain the meaning and nature of inflation,explore its causes,treatment of the policy recommendations put forward.%为应对国际金融危机,我国实施了四万亿元的刺激政策。在货币供应量和信贷额大量扩张的背景下,市场上注入了过多的流动性,产生了明显的通胀预期。我国是否会发生通货膨胀是由多种要素共同决定的。文中对2013年来物价上涨、通货膨胀等现象进行分析,阐述通货膨胀的涵义和性质,探究其成因,提出治理的政策建议。

  10. 我国SNS营销现状与发展趋势研究%Study on the Current Status and Development Trend of SNS Marketing in China

    Institute of Scientific and Technical Information of China (English)

    刘宪立; 杨蔚

    2015-01-01

    From aspects of SNS marketing connotations,marketing tools,marketing strategies, and marketing evaluation,etc.,this paper analyzes some representative literature results, reveals the progress of the research on SNS marketing in China, and probes into the development trend of SNS marketing in China, including the dynamic recognition of SNS marketing, the deepening connection between commercial intelligent method and social platform, the microscopic verification of marketing strategy, and the diversification of evaluation thoughts.%从SNS营销内涵、营销工具、营销策略和营销评价等方面对有代表性的文献成果进行了分析,揭示了我国SNS营销的研究进展,探讨了我国SNS营销的发展趋势,包括SNS营销认识动态化、商务智能方法和社交平台结合深入化、营销策略微观化、评价思路多元化.

  11. THE CURRENT PREVALENCE STATUS OF BVDV IN CHINA%牛病毒性腹泻在中国的流行现状分析

    Institute of Scientific and Technical Information of China (English)

    朱礼倩; 周艳君; 于海; 童光志

    2011-01-01

    牛病毒性腹泻是由牛病毒性腹泻病毒(Bovine viral diarrhea virus,BVDV)引起的,主要侵害牛、羊、鹿、牦牛等反刍动物及猪的一种重要传染病。该病对畜牧业危害巨大,欧美等国家已经开始实施BVDV根除计划。该病在中国广泛流行,本文就BVDV在中国的流行状况进行分析和概述。%Bovine viral diarrhea virus(BVDV) imposes severe threat to cattle,sheep and other ruminants and swine.The disease has caused significant economical loss to cattle farms worldwide.The eradication program for BVDV has being carried out in Europe.Bovine viral diarrhea virus is widely distributed in China.The prevalence of BVDV in China was updated in the review.

  12. Quantifying Heartbeat Dynamics by Magnitude and Sign Correlations

    Science.gov (United States)

    Ivanov, Plamen Ch.; Ashkenazy, Yosef; Kantelhardt, Jan W.; Stanley, H. Eugene

    2003-05-01

    We review a recently developed approach for analyzing time series with long-range correlations by decomposing the signal increment series into magnitude and sign series and analyzing their scaling properties. We show that time series with identical long-range correlations can exhibit different time organization for the magnitude and sign. We apply our approach to series of time intervals between consecutive heartbeats. Using the detrended fluctuation analysis method we find that the magnitude series is long-range correlated, while the sign series is anticorrelated and that both magnitude and sign series may have clinical applications. Further, we study the heartbeat magnitude and sign series during different sleep stages — light sleep, deep sleep, and REM sleep. For the heartbeat sign time series we find short-range anticorrelations, which are strong during deep sleep, weaker during light sleep and even weaker during REM sleep. In contrast, for the heartbeat magnitude time series we find long-range positive correlations, which are strong during REM sleep and weaker during light sleep. Thus, the sign and the magnitude series provide information which is also useful for distinguishing between different sleep stages.

  13. Derivation of Johnson-Cousins Magnitudes from DSLR Camera Observations

    Science.gov (United States)

    Park, Woojin; Pak, Soojong; Shim, Hyunjin; Le, Huynh Anh N.; Im, Myungshin; Chang, Seunghyuk; Yu, Joonkyu

    2016-01-01

    The RGB Bayer filter system consists of a mosaic of R, G, and B filters on the grid of the photo sensors which typical commercial DSLR (Digital Single Lens Reflex) cameras and CCD cameras are equipped with. Lot of unique astronomical data obtained using an RGB Bayer filter system are available, including transient objects, e.g. supernovae, variable stars, and solar system bodies. The utilization of such data in scientific research requires that reliable photometric transformation methods are available between the systems. In this work, we develop a series of equations to convert the observed magnitudes in the RGB Bayer filter system (RB, GB, and BB) into the Johnson-Cousins BVR filter system (BJ, VJ, and RC). The new transformation equations derive the calculated magnitudes in the Johnson-Cousins filters (BJcal, VJcal, and RCcal) as functions of RGB magnitudes and colors. The mean differences between the transformed magnitudes and original magnitudes, i.e. the residuals, are (BJ - BJcal) = 0.064 mag, (VJ - VJcal) = 0.041 mag, and (RC - RCcal) = 0.039 mag. The calculated Johnson-Cousins magnitudes from the transformation equations show a good linear correlation with the observed Johnson-Cousins magnitudes.

  14. Regression between earthquake magnitudes having errors with known variances

    Science.gov (United States)

    Pujol, Jose

    2016-07-01

    Recent publications on the regression between earthquake magnitudes assume that both magnitudes are affected by error and that only the ratio of error variances is known. If X and Y represent observed magnitudes, and x and y represent the corresponding theoretical values, the problem is to find the a and b of the best-fit line y = a x + b. This problem has a closed solution only for homoscedastic errors (their variances are all equal for each of the two variables). The published solution was derived using a method that cannot provide a sum of squares of residuals. Therefore, it is not possible to compare the goodness of fit for different pairs of magnitudes. Furthermore, the method does not provide expressions for the x and y. The least-squares method introduced here does not have these drawbacks. The two methods of solution result in the same equations for a and b. General properties of a discussed in the literature but not proved, or proved for particular cases, are derived here. A comparison of different expressions for the variances of a and b is provided. The paper also considers the statistical aspects of the ongoing debate regarding the prediction of y given X. Analysis of actual data from the literature shows that a new approach produces an average improvement of less than 0.1 magnitude units over the standard approach when applied to Mw vs. mb and Mw vs. MS regressions. This improvement is minor, within the typical error of Mw. Moreover, a test subset of 100 predicted magnitudes shows that the new approach results in magnitudes closer to the theoretically true magnitudes for only 65 % of them. For the remaining 35 %, the standard approach produces closer values. Therefore, the new approach does not always give the most accurate magnitude estimates.

  15. OCEAN-WIDE TSUNAMIS, MAGNITUDE THRESHOLDS, AND 1946 TYPE EVENTS

    Directory of Open Access Journals (Sweden)

    Daniel A. Walker

    2005-01-01

    Full Text Available An analysis of magnitudes and runups in Hawaii for more than 200 tsunamigenic earthquakes along the margins of the Pacific reveals that all of the earthquakes with moment magnitudes of 8.6 or greater produced significant Pacific-wide tsunamis. Such findings can be used as a basis for early warnings of significant ocean-wide tsunamis as a supplement to, or in the absence of, more comprehensive data from other sources. Additional analysis of magnitude and runup data suggests that 1946 type earthquakes and tsunamis may be more common than previously believed.

  16. Comparison of magnetic probe calibration at nano and millitesla magnitudes

    Science.gov (United States)

    Pahl, Ryan A.; Rovey, Joshua L.; Pommerenke, David J.

    2014-01-01

    Magnetic field probes are invaluable diagnostics for pulsed inductive plasma devices where field magnitudes on the order of tenths of tesla or larger are common. Typical methods of providing a broadband calibration of dot{{B}} probes involve either a Helmholtz coil driven by a function generator or a network analyzer. Both calibration methods typically produce field magnitudes of tens of microtesla or less, at least three and as many as six orders of magnitude lower than their intended use. This calibration factor is then assumed constant regardless of magnetic field magnitude and the effects of experimental setup are ignored. This work quantifies the variation in calibration factor observed when calibrating magnetic field probes in low field magnitudes. Calibration of two dot{{B}} probe designs as functions of frequency and field magnitude are presented. The first dot{{B}} probe design is the most commonly used design and is constructed from two hand-wound inductors in a differential configuration. The second probe uses surface mounted inductors in a differential configuration with balanced shielding to further reduce common mode noise. Calibration factors are determined experimentally using an 80.4 mm radius Helmholtz coil in two separate configurations over a frequency range of 100-1000 kHz. A conventional low magnitude calibration using a vector network analyzer produced a field magnitude of 158 nT and yielded calibration factors of 15 663 ± 1.7% and 4920 ± 0.6% {T}/{V {s}} at 457 kHz for the surface mounted and hand-wound probes, respectively. A relevant magnitude calibration using a pulsed-power setup with field magnitudes of 8.7-354 mT yielded calibration factors of 14 615 ± 0.3% and 4507 ± 0.4% {T}/{V {s}} at 457 kHz for the surface mounted inductor and hand-wound probe, respectively. Low-magnitude calibration resulted in a larger calibration factor, with an average difference of 9.7% for the surface mounted probe and 12.0% for the hand-wound probe. The

  17. Dynamic detection of wake-sleep transition with reaction time-magnitude

    Institute of Scientific and Technical Information of China (English)

    Chuang Gao; Bin Chen; Wei Wei

    2009-01-01

    BACKGROUND: According to observable behaviors, sleep and wakefulness are two fundamentally different behavioral states. Although electroencephalogram (EEG) is traditionally used to define sleep stage, it is difficult to detect or to quantify microarousals or disruptions during sleep. In addition,initial sleep cannot be defined. It is thought that the wake-sleep transition cannot be defined by EEG patterns.OBJECTIVE: To observe the behavioral response magnitude during wake-sleep transition by EEG monitoring and to define the wake-sleep transition.DESIGN, TIME AND SE'n'ING: A behavioral and neural network study was performed at the Key Lab of Human Being Development and Mental Health of Central China Normal University, and Lab of Brain and Cognitive Science of South Central University for Nationalities, China in July 2007.PARTICIPANTS: A total of 30 healthy volunteers, of equal gender and aged (19.7+1.1) years, were recruited from the Central China Normal University, China for this study. None of the subjects had undergone EEG recording prior to this study or received any medication for sleep disturbances.METHODS: A novel adaptive approach was applied to detect wake-sleep transition, which avoided stimulus-induced waking. To test the difference between wake state and wake-sleep transition, the amount of self-information and mutual-information were effective parameters to analyze wake-sleep transition.MAIN OUTCOME MEASURES: The following parameters were measured: morphological changes in reaction time-magnitude, as well as correlation between phase changes and sleep, and wake and wake-sleep transition.RESULTS: There were three typical phases in morphological changes of reaction time-magnitude.With regard to the behavioral definition and criterion for sleep, the phase morphological characteristics displayed good correlation with behavioral states, such as sleep, wakefulness, and sleep onset. Entropy as an indicator of brain cognitive processes was introduced to test

  18. Current Situation, Challenges and Countermeasures of China' s Rosin Market%中国松香市场现状、挑战与对策

    Institute of Scientific and Technical Information of China (English)

    董静曦; 刘自远; 张子翼; 叶可庄; 吴健

    2015-01-01

    以松香市场数据为基础,研究分析中国的松香需求市场及行业需求构成. 近期我国松香市场需求总量约为57. 1万t/a. 产品供给、生产成本、生产竞争、产品替代是影响中国松香市场供需和价格的主要因素. 世界各国的松香生产快速发展对我国松香产业形成了严峻的竞争挑战,多种替代品的出现对我国松香生产影响甚大. 提出我国松香产业应从数量向质量、低价应用向高端开发转变的思路,采取加大技术创新增强竞争力,依靠技术进步降低生产成本,实施产业转移升级换代战略,走绿色环保健康产品之路的应对措施.%Based on the data of rosin market, this paper analyzes the demand market and the demand structure of rosin industry in China. The total market demand of rosin is about 571,000 t/a. Product supply, production cost, product competition, and product substitution are the major factors influencing rosin' s supply, demand and price in Chinese market. The rapid development of rosin production in the world has brought intense competitions and severe challenges for rosin industry in our country, and the emergence of a variety of alternative products has even a greater impacts on the production of rosin in China. We propose that Chinas rosin industry should follow the ideas of transformation from quantity to quality, and from low-cost applications to high level development. Technological innovation should be encouraged to enhance competitiveness and reduce the cost of production. We should implement the strategy of industry transferring, upgrading and innovating so as to produce green and healthy products.

  19. Improvements in magnitude precision, using the statistics of relative amplitudes measured by cross correlation

    Science.gov (United States)

    Schaff, David P.; Richards, Paul G.

    2014-04-01

    waveforms inevitably contain both signal and noise. However, this bias is predicted to be minimal for typical detection thresholds. Making measurements of the ratio of the L2 norms is shown to remove the bias due to degradation of waveform similarity for real data. The scatter of these cross-correlation measurements of relative magnitude is much less than those obtained by differencing magnitudes in a traditional catalogue. Of 14 025 events in and near China, 34 per cent had over an order of magnitude reduction in the median standard deviation (0.0342 magnitude units) as compared to the estimated scatter in the catalogue (0.3454 magnitude units). And 78 per cent of the events show a factor 3 improvement or better in the precision of relative event size measured as the ratio of the L2 norms as compared to the precision of the catalogue for relative magnitudes. These results suggest that the ratio of the L2 norms is an appropriate measure of relative magnitudes for general seismicity of a monitoring region, when there is significant waveform dissimilarity for neighbouring events. This measure maintains a higher degree of measurement precision as compared to the catalogue.

  20. Study onCurrent Status of Registration Management of Pharmaceutical Preparations inMedical Institutions in China%全国医疗机构制剂注册管理现状研究

    Institute of Scientific and Technical Information of China (English)

    战嘉怡; 刘春; 丁建华; 李灿; 李蜀平; 张体灯; 王海南

    2015-01-01

    目的:了解医疗机构制剂注册管理现状和存在问题,为药品监管部门制定相关政策提供参考。方法:采取问卷调查、实地调研、文献分析、会议座谈、深度访谈等多种形式进行调查。结果:通过调研获得了全国医疗机构制剂注册信息,了解了各省、自治区、直辖市制剂管理的具体方式,征求了省级药品监管部门、医疗机构以及部分名老中医专家对现行制剂管理模式的意见和建议。结论:现行管理模式基本适合我国医疗机构制剂现状,《医疗机构制剂注册管理办法(试行)》的实施有效遏制了制剂批准文号的盲目增加,推动了制剂注册管理水平的提高,但尚有需要完善改进之处。%Objective:To understand the current situation of registration management of pharmaceutical preparations in medical institutions and the existing problems so as to provide references for the drug supervision and administration department to draft relevant policies.Methods:A variety of investigation forms were adopted, such as questionnaire survey, ifeld investigation, literature analysis, meeting and depth interviews. Results:The information of pharmaceutical preparations registration of medical institutions in China was obtained. The speciifc management methods in each province, autonomous region and municipality of China were surveyed. The opinions and suggestions on current management mode were collected from the provincial drug supervision and administration departments, medical institutions and famous traditional Chinese medicine doctors.Conclusion:The current management mode is suitable for the current conditions of pharmaceutical preparations in medical institutions in China. The implementation of Provisions for the Registration of Pharmaceutical Preparations in Medical Institutions (interim) effectively slowed down the growth rate of the new approval number, and improved the level of registration

  1. Food traceability systems in China: The current status of and future perspectives on food supply chain databases, legal support, and technological research and support for food safety regulation.

    Science.gov (United States)

    Tang, Qi; Li, Jiajia; Sun, Mei; Lv, Jun; Gai, Ruoyan; Mei, Lin; Xu, Lingzhong

    2015-02-01

    Over the past few decades, the field of food security has witnessed numerous problems and incidents that have garnered public attention. Given this serious situation, the food traceability system (FTS) has become part of the expanding food safety continuum to reduce the risk of food safety problems. This article reviews a great deal of the related literature and results from previous studies of FTS to corroborate this contention. This article describes the development and benefits of FTS in developed countries like the United States of America (USA), Japan, and some European countries. Problems with existing FTS in China are noted, including a lack of a complete database, inadequate laws and regulations, and lagging technological research into FTS. This article puts forward several suggestions for the future, including improvement of information websites, clarification of regulatory responsibilities, and promotion of technological research.

  2. Current trends in outcome studies for children with hearing loss and the need to establish a comprehensive framework of measuring outcomes in children with hearing loss in China

    Institute of Scientific and Technical Information of China (English)

    Xueman Liu

    2016-01-01

    Since the 1970s, outcome studies for children with hearing loss expanded from focusing on assessing auditory awareness and speech perception skills to evaluating language and speech development. Since the early 2000s, the multi-center large scale research systematically studied outcomes in the areas of auditory awareness, speech-perception, language development, speech development, educational achievements, cognitive development, and psychosocial development. These studies advocated the establishment of baseline and regular follow-up evaluations with a comprehensive framework centered on language development. Recent research interests also include understanding the vast differences in outcomes for children with hearing loss, understanding the relationships between neurocognitive development and language acquisition in children with hearing loss, and using outcome studies to guide evidence-based clinical practice. After the establishment of standardized Mandarin language assessments, outcomes research in Mainland China has the potential to expand beyond auditory awareness and speech perception studies.

  3. 我国儿科临床科学研究的现状与思考%Current status of pediatric clinical research in China

    Institute of Scientific and Technical Information of China (English)

    杨锡强

    2008-01-01

    @@ Various definitions have been given to the term "scientific research". It is described as " pursuing truth and exploring knowledge", " critical thinking to develop knowledge", or " collection, synthesis, and analysis of information" . In China, the Ministry of Education proposed that scientific research is to "promote and apply knowledge to invent new techniques and provide creative work". Based on the definitions given above, we describe scientific research as " to explore what we do not know, and to collect, analyze, distinguish, apply, and evaluate what we have known". It is characterized by innovation and non-replication, which involve discontinued and complicated exploration. According to this definition, medical scientific research is therefore defined as investigating the nature of human life and rules of illness, as well as seeking methods to prevent and treat diseases, and improve people's health.

  4. 我国定向体育旅游发展的现状与对策%Current development of orienteering sport tourism in China and countermeasures

    Institute of Scientific and Technical Information of China (English)

    陈溦

    2011-01-01

    定向体育旅游是体育旅游的重要组成部分,发展定向体育旅游已成为保持我国体育旅游可持续发展的一个重要课题。提出并阐述了定向体育旅游的概念,分析了我国目前定向体育旅游发展的现状和存在的主要问题,并提出了发展定向体育旅游的对策。%The orienteering sport tourism is an important part of the sport tourism and has become an important part for the sustainable development of the sport tourism in China. The paper proposes the connotation of the orienteering sport tourism and analyses the

  5. 我国手机杂志APP现状与发展对策%The Current Situation and Development Dtrategy of China Mobile Magazine APP

    Institute of Scientific and Technical Information of China (English)

    单宁; 红云

    2015-01-01

    Based on expounding and analyzing the development status and problems of mobile magazine APP in our country, this article puts forward that the development of China's mobile magazine APP should focus on brand extension, personalized custom publishing, proift model optimization and the construction of the high-quality user experience in the future.%文章首先对我国手机杂志APP的发展现状和存在的问题进行阐述和分析,在此基础上提出我国手机杂志APP在未来发展中应注重品牌延伸化、个性化定制出版、盈利模式优化和优质用户体验的构建等对策。

  6. Research History and Current Situation of Qinzhou-Hangzhou Metallogenic Belt, South China%钦杭成矿带的研究历史和现状

    Institute of Scientific and Technical Information of China (English)

    徐德明; 蔺志永; 龙文国; 张鲲; 王磊; 周岱; 黄皓

    2012-01-01

    介绍了钦杭结合带与成矿带的提出过程及其基本特征,以及有关华南大地构造和华夏古陆问题的研究历史和现状。20世纪80年代中期在重新认定华夏古陆的基础上建立扬子与华夏古陆碰撞拼接模式,随之于20世纪90年代初提出钦杭结合带与成矿带,这是华南大地构造研究的重要转折,对华南大地构造和区域成矿的研究有着重要贡献。钦杭成矿带不仅在华南大地构造格局中占有十分重要的地位,对探讨全球Grenville造山、Rodinia超大陆裂解、新元古代成矿爆发等也有重要意义。目前已从岩石组合、构造特征、地球物理信息、成矿作用等方面对钦杭成矿带进行了论证。但毕竟钦杭成矿带的研究历史不长,还有许多基础地质和区域成矿问题尚无定论,为此提出了若干值得关注并可望在近期取得突破的问题。%The Qinzhou-Hangzhou (Qi-Hang) joint belt is located along the Neoproterozoic suture zone in South China, which separates the Yangtze and Cathaysian Blocks. This paper summarizes the proposed process and geological characterisitics of the Qin-Hang joint belt and Qing-Hang Metallogenic Belt, as well as the research history and present situation of tectonic evolution of South China block and Cathaysian block. In mid-1980s, the subduction/collision model between the Yangtze and Cathaysia Blocks was proposed based on the comprehensive understanding of the Cathaysia; followed in early-1990s, the Qin-Hang joint belt and Qin-Hang metallogenic belt were gradually proposed, which was an important turning point and contributed hugely in the tectonic and regional metallogenic studies of South China. This metallogenic belt play an important role in reconstructing the tectonic framework of South China, as well as in discussing the worldwide Grenvillian orogenesis, break-up history of the supercontinent Rodinia and the Neoproterozoic explosive mineralization. Previous

  7. Current levels and composition profiles of emerging halogenated flame retardants and dehalogenated products in sewage sludge from municipal wastewater treatment plants in China.

    Science.gov (United States)

    Zeng, Lixi; Yang, Ruiqiang; Zhang, Qinghua; Zhang, Haidong; Xiao, Ke; Zhang, Haiyan; Wang, Yawei; Lam, Paul K S; Jiang, Guibin

    2014-11-01

    Occurrence of new toxic chemicals in sludge from wastewater treatment plants (WWTPs) is of concern for the environment and human health. Alternative halogenated flame retardants (HFRs) are a group of potentially harmful organic contaminants in the environment. In this study, a nationwide survey was carried out to identify the occurrence of HFRs and their potential dehalogenated products in sewage sludge from 62 WWTPs in China. Of all 20 target chemicals analyzed, decabromodiphenyl ethane (DBDPE), hexabromocyclododecane (HBCD) and 1, 2-bis (2,4,6-tribromophenoxy)-ethane (BTBPE) were detected in all sludge samples, and the concentrations were in the range of 0.82-215, 0.09-65.8, and 0.10-2.26 ng g(-1) d.w., respectively. Dechlorane Plus (DP) was found in 60 of 62 samples, and the concentration ranged from nd-298 ng g(-1) with a mean of 18.9 ng g(-1) d.w. The anti-DP fractional abundance fanti (0.79) in the samples was much higher than the commercial DP composition (fanti=0.59), indicating a stereoselective degradation. Comparison with global sludge concentrations of HFRs indicate that China is at the medium pollution level in the world. Principal components analysis revealed that strong correlations existed between ln-transformed concentrations (natural logarithm) of the dominant BFRs and total organic carbon (TOC) as well as industrial wastewater proportion, influent volume and serving population. Significant linear relationships (R=0.360-0.893, penvironment. Two kinds of dehalogenated products, pentabromocyclododecane (PBCD) and undecachloropentacyclooctadecadiene (Cl11-DP), derived from HBCD and DP, were also identified in sewage sludge for the first time. PMID:25286358

  8. 浅析我国音乐教育的现状与改革%Analysis of the current situation and reform of music education in China

    Institute of Scientific and Technical Information of China (English)

    黄静

    2012-01-01

      音乐是一门创造性的学科,它的最大优势就是能够培养人感受美,创造美的能力,而音乐的实践特征、教学内容所具有的体验性和操作性也决定了音乐教学方法的多样性和多变性。随着时代的发展,我国音乐教育在教育观念、教学方法等方面等难以适应我国音乐教育事业的需要,改革势在必行。论文从音乐教育的多个角度入手,针对目前我国音乐教育中教育观念、教育思路、教育方法所存在问题,提出相应的解决办法和思路%  Music is a creative subject, its biggest advantage is to raise people to feel the beauty, the ability to create art, and practice characteristics, teaching content of music has experience and operation also determines the multiplicity and variability of music teaching method. With the development of the times, China's music education is difficult to adapt to China's music education reform need in education concept, teaching methods and other aspects, the reform is imperative. The paper from multiple angles of music education, in view of the problems in education concept, education idea, education method in present our country music education, proposes the corresponding solution and the train of thought.

  9. 我国食品添加剂的使用现状及对策%Current situation of food additives use in China and countermeasures

    Institute of Scientific and Technical Information of China (English)

    刘颖辉; 张智新

    2012-01-01

    食品添加剂广泛用于食品生产和加工,随着我国现代食品工业的快速发展,其种类和数量越来越多,也出现了一系列由于不规范使用食品添加剂引发的事件,已经严重危及到我国食品安全.作者深入分析了当前我国食品添加剂使用中存在的超剂量、超范围、重复使用、隐瞒使用等各种不规范使用甚至违法使用的问题,最后建设性地提出了加强立法、完善标准、提高检测水平、采取新工艺、实行分类监管、强化使用者食品安全意识等解决问题的有效对策.%Food additives are widely used in food production and processing. With the rapid development of modem food industry, types and number of food additives are increasing rapidly, and there are a series of events triggered by non-standard use of food additives, which has seriously influenced the food safety in China. The paper analyzes various problems of non-standard use and illegal use of food additives at present in China, including high dose, beyond its scope, repeated use and conceal use, then puts forward countermeasures of strengthening legislation, perfecting standards, improving detection level, adopting new technology, implementing classification regulation, as well as strengthening users'awareness of food safety.

  10. Analysis on the Current Situation and Legislation of Family Violence in China%我国家庭暴力的现状及法律分析

    Institute of Scientific and Technical Information of China (English)

    张蕊

    2012-01-01

    With the social development and the progress of human right protection drive, family violence, especially on women, becomes an international problem. Recently in China, family violence occurs frequently, which is one factor causing the imbalance of the society. Family violence severely destroys the health of women both mentally and physically, and has bad effect on the growing minors. Reasons for family violence are both so- cial and individual. China doesn't have enough legislati system is not complete. It is required to draft legislation the attention of all the society, and improve the degree of and the price caused by it. ve interference on family violence, and the legislation against it, help the victims with detailed methods with civilization of the whole nation to reduce family violence%目前,我国家庭暴力频繁发生,已成为社会不稳定因素之一。家庭暴力不仅严重损害妇女的身心健康,而且给少年儿童的健康成长造成恶劣影响。针对我国对家庭暴力的法律干预力度不够,立法体系不完善的现状,丞须制定反家庭暴力法,运用全社会的力量,采取具体措施救助受害人,提高全民的文明程度等以减少家庭暴力的发生,减轻为家庭暴力所付出的社会代价。

  11. Magnitude-frequency distribution of volcanic explosion earthquakes

    Science.gov (United States)

    Nishimura, Takeshi; Iguchi, Masato; Hendrasto, Mohammad; Aoyama, Hiroshi; Yamada, Taishi; Ripepe, Maurizio; Genco, Riccardo

    2016-07-01

    Magnitude-frequency distributions of volcanic explosion earthquakes that are associated with occurrences of vulcanian and strombolian eruptions, or gas burst activity, are examined at six active volcanoes. The magnitude-frequency distribution at Suwanosejima volcano, Japan, shows a power-law distribution, which implies self-similarity in the system, as is often observed in statistical characteristics of tectonic and volcanic earthquakes. On the other hand, the magnitude-frequency distributions at five other volcanoes, Sakurajima and Tokachi-dake in Japan, Semeru and Lokon in Indonesia, and Stromboli in Italy, are well explained by exponential distributions. The statistical features are considered to reflect source size, as characterized by a volcanic conduit or chamber. Earthquake generation processes associated with vulcanian, strombolian and gas burst events are different from those of eruptions ejecting large amounts of pyroclasts, since the magnitude-frequency distribution of the volcanic explosivity index is generally explained by the power law.

  12. When teaching: Out with magnitudes, in with monochromatic luminosities!

    CERN Document Server

    Verbunt, Frank

    2008-01-01

    The goal of this document is to illustrate that teaching the concepts of magnitudes is a needless complication in introductory astronomy courses, and that use of monochromatic luminosities, rather than arbitrarily defined magnitudes, leads to a large gain in transparency. This illustration is done through three examples: the Hertzsprung-Russell diagram, the cosmic distance ladder, and interstellar reddening. I provide conversion equations from the magnitude-based to the luminosity-based system; a brief discussion; and a reference to sample lecture notes. I suggest that we, astronomers in the 21st century, abolish magnitudes and instead use (apparent) monochromatic luminosities in non-specialist teaching. Given the large gain in transparency I further propose that we seriously consider using (apparent) monochromatic luminosities also in research papers, bringing optical astronomy in line with astronomy at other wavelengths. Comments are welcome.

  13. Variable stars magnitudes estimations exploiting the eye physiology

    CERN Document Server

    Sigismondi, Costantino

    2011-01-01

    The physiology of the dark adaption process of the eye is revisited from an astronomical point of view. A new method for the magnitude estimation of a star is presented. It is based upon the timing of the physiological cycle of the rhodopsin during the eye dark adaption process. The limits of the application of the method are discussed. This method is suitable for bright stars as Betelgeuse, Antares or Delta Scorpii or stars at the limiting magnitude observed with a telescope.

  14. An Overview of the Study on Stress Magnitude

    Institute of Scientific and Technical Information of China (English)

    Sheng Shuzhong; Wan Yongge

    2009-01-01

    Crustal stress field holds an important position in geodynamics research, such as in plate motion simulations, uplift of the Qinghai-Xizang (Tibet) Plateau and earthquake preparation and occurrence. However, most of the crustal stress studies emphasize particularly on the determination of stress direction, with little study being done on stress magnitude at present. After reviewing ideas on a stress magnitude study from geological, geophysical and various other aspects, a method to estimate the stress magnitude in the source region according to the deflection of stress direction before and after large earthquakes and the stress drop tensor of earthquake rupture has been developed. The proposed method can also be supplemented by the average apparent stress before and after large earthquakes. The stress direction deflection before and after large earthquakes can be inverted by massive focal mechanisms of foreshocks and aftershocks and the stress drop field generated by the seismic source can be calculated by the detailed distribution of the earthquake's rupture. The mathematical relationship can then be constructed between the stress drop field, where its magnitude and direction are known and the stress tensor before and after large earthquakes, where its direction is known but magnitude is unknown, thereby obtaining the stress magnitude. The average apparent stress before and after large earthquakes can be obtained by using the catalog of broadband radiated energy and seismic moment tensor of foreshocks and aftershocks and the different responses to stress drops. This relationship leads to another estimation of stress magnitude before a large earthquake. The stress magnitude and its error are constrained by combining the two methods, which provide new constraints for the geodyuamics study.

  15. Absolute magnitudes and phase coefficients of trans-Neptunian objects

    Science.gov (United States)

    Alvarez-Candal, A.; Pinilla-Alonso, N.; Ortiz, J. L.; Duffard, R.; Morales, N.; Santos-Sanz, P.; Thirouin, A.; Silva, J. S.

    2016-02-01

    Context. Accurate measurements of diameters of trans-Neptunian objects (TNOs) are extremely difficult to obtain. Thermal modeling can provide good results, but accurate absolute magnitudes are needed to constrain the thermal models and derive diameters and geometric albedos. The absolute magnitude, HV, is defined as the magnitude of the object reduced to unit helio- and geocentric distances and a zero solar phase angle and is determined using phase curves. Phase coefficients can also be obtained from phase curves. These are related to surface properties, but only few are known. Aims: Our objective is to measure accurate V-band absolute magnitudes and phase coefficients for a sample of TNOs, many of which have been observed and modeled within the program "TNOs are cool", which is one of the Herschel Space Observatory key projects. Methods: We observed 56 objects using the V and R filters. These data, along with those available in the literature, were used to obtain phase curves and measure V-band absolute magnitudes and phase coefficients by assuming a linear trend of the phase curves and considering a magnitude variability that is due to the rotational light-curve. Results: We obtained 237 new magnitudes for the 56 objects, six of which were without previously reported measurements. Including the data from the literature, we report a total of 110 absolute magnitudes with their respective phase coefficients. The average value of HV is 6.39, bracketed by a minimum of 14.60 and a maximum of -1.12. For the phase coefficients we report a median value of 0.10 mag per degree and a very large dispersion, ranging from -0.88 up to 1.35 mag per degree.

  16. Magnitude, diversity, capacities, and dimensions of metric spaces

    OpenAIRE

    Meckes, Mark W.

    2013-01-01

    Magnitude is a numerical invariant of metric spaces introduced by Leinster, motivated by considerations from category theory. This paper extends the original definition for finite spaces to compact spaces, in an equivalent but more natural and direct manner than in previous works by Leinster, Willerton, and the author. The new definition uncovers a previously unknown relationship between magnitude and capacities of sets. Exploiting this relationship, it is shown that for a compact subset of E...

  17. Some explicit expressions for the probability distribution of force magnitude

    Indian Academy of Sciences (India)

    Saralees Nadarajah

    2008-08-01

    Recently, empirical investigations have suggested that the components of contact forces follow the exponential distribution. However, explicit expressions for the probability distribution of the corresponding force magnitude have not been known and only approximations have been used in the literature. In this note, for the first time, I provide explicit expressions for the probability distribution of the force magnitude. Both two-dimensional and three-dimensional cases are considered.

  18. Chinas Ingenieure

    Institute of Scientific and Technical Information of China (English)

    VonChristophHein; Schanghai

    2005-01-01

    Drei Schlagworte praegen derzeit das Bild von China im Ausland: China wird zur Fabrik der Welt. China wird zum groeBten Markt der Welt. Und China ist ein Hochrisikoland. Bald diirfte sich ein viertes dazugesellen: China wird zum wichtigen Standort fiir Forschung und Entwicklung.

  19. No evidence of magnitude clustering in an aftershock sequence of nano- and picoseismicity.

    Science.gov (United States)

    Davidsen, Jörn; Kwiatek, Grzegorz; Dresen, Georg

    2012-01-20

    One of the hallmarks of our current understanding of seismicity as highlighted by the epidemic-type-aftershock sequence model is that the magnitudes of earthquakes are independent of one another and can be considered as randomly drawn from the Gutenberg-Richter distribution. This assumption forms the basis of many approaches for forecasting seismicity rates and hazard assessment. Recently, it has been suggested that the assumption of independent magnitudes is not valid. It was subsequently argued that this conclusion was not supported by the original earthquake data from California. One of the main challenges is the lack of completeness of earthquake catalogs. Here, we study an aftershock sequence of nano- and picoseismicity as observed at the Mponeng mine, for which the issue of incompleteness is much less pronounced. We show that this sequence does not exhibit any significant evidence of magnitude correlations.

  20. On the Testing of Ground--Motion Prediction Equations against Small--Magnitude Data

    CERN Document Server

    Beauval, Céline; Laurendeau, Aurore; Delavaud, Elise; Cotton, Fabrice; Guéguen, Philippe; Kuehn, Nicolas; 10.1785/0120110271

    2012-01-01

    Ground-motion prediction equations (GMPE) are essential in probabilistic seismic hazard studies for estimating the ground motions generated by the seismic sources. In low seismicity regions, only weak motions are available in the lifetime of accelerometric networks, and the equations selected for the probabilistic studies are usually models established from foreign data. Although most ground-motion prediction equations have been developed for magnitudes 5 and above, the minimum magnitude often used in probabilistic studies in low seismicity regions is smaller. Desaggregations have shown that, at return periods of engineering interest, magnitudes lower than 5 can be contributing to the hazard. This paper presents the testing of several GMPEs selected in current international and national probabilistic projects against weak motions recorded in France (191 recordings with source-site distances up to 300km, 3.8\\leqMw\\leq4.5). The method is based on the loglikelihood value proposed by Scherbaum et al. (2009). The ...

  1. Numerical magnitude processing in children with mild intellectual disabilities.

    Science.gov (United States)

    Brankaer, Carmen; Ghesquière, Pol; De Smedt, Bert

    2011-01-01

    The present study investigated numerical magnitude processing in children with mild intellectual disabilities (MID) and examined whether these children have difficulties in the ability to represent numerical magnitudes and/or difficulties in the ability to access numerical magnitudes from formal symbols. We compared the performance of 26 children with MID on a symbolic (digits) and a non-symbolic (dot-arrays) comparison task with the performance of two control groups of typically developing children: one group matched on chronological age and one group matched on mathematical ability level. Findings revealed that children with MID performed more poorly than their typically developing chronological age-matched peers on both the symbolic and non-symbolic comparison tasks, while their performance did not substantially differ from the ability-matched control group. These findings suggest that the development of numerical magnitude representation in children with MID is marked by a delay. This performance pattern was observed for both symbolic and non-symbolic comparison tasks, although difficulties on the former task were more prominent. Interventions in children with MID should therefore foster both the development of magnitude representations and the connections between symbols and the magnitudes they represent. PMID:21645990

  2. Magnitude knowledge: the common core of numerical development.

    Science.gov (United States)

    Siegler, Robert S

    2016-05-01

    The integrated theory of numerical development posits that a central theme of numerical development from infancy to adulthood is progressive broadening of the types and ranges of numbers whose magnitudes are accurately represented. The process includes four overlapping trends: (1) representing increasingly precisely the magnitudes of non-symbolic numbers, (2) connecting small symbolic numbers to their non-symbolic referents, (3) extending understanding from smaller to larger whole numbers, and (4) accurately representing the magnitudes of rational numbers. The present review identifies substantial commonalities, as well as differences, in these four aspects of numerical development. With both whole and rational numbers, numerical magnitude knowledge is concurrently correlated with, longitudinally predictive of, and causally related to multiple aspects of mathematical understanding, including arithmetic and overall math achievement. Moreover, interventions focused on increasing numerical magnitude knowledge often generalize to other aspects of mathematics. The cognitive processes of association and analogy seem to play especially large roles in this development. Thus, acquisition of numerical magnitude knowledge can be seen as the common core of numerical development. PMID:27074723

  3. The color-magnitude distribution of small Jupiter Trojans

    CERN Document Server

    Wong, Ian

    2015-01-01

    We present an analysis of survey observations targeting the leading L4 Jupiter Trojan cloud near opposition using the wide-field Suprime-Cam CCD camera on the 8.2 m Subaru Telescope. The survey covered about 38 deg$^2$ of sky and imaged 147 fields spread across a wide region of the L4 cloud. Each field was imaged in both the $g'$ and the $i'$ band, allowing for the measurement of $g-i$ color. We detected 557 Trojans in the observed fields, ranging in absolute magnitude from $H=10.0$ to $H = 20.3$. We fit the total magnitude distribution to a broken power law and show that the power-law slope rolls over from $0.45\\pm 0.05$ to $0.36^{+0.05}_{-0.09}$ at a break magnitude of $H_{b}=14.93^{+0.73}_{-0.88}$. Combining the best-fit magnitude distribution of faint objects from our survey with an analysis of the magnitude distribution of bright objects listed in the Minor Planet Center catalog, we obtain the absolute magnitude distribution of Trojans over the entire range from $H=7.2$ to $H=16.4$. We show that the $g-i...

  4. Earthquake rate and magnitude distributions of great earthquakes for use in global forecasts

    Science.gov (United States)

    Kagan, Yan Y.; Jackson, David D.

    2016-07-01

    We have obtained new results in the statistical analysis of global earthquake catalogues with special attention to the largest earthquakes, and we examined the statistical behaviour of earthquake rate variations. These results can serve as an input for updating our recent earthquake forecast, known as the `Global Earthquake Activity Rate 1' model (GEAR1), which is based on past earthquakes and geodetic strain rates. The GEAR1 forecast is expressed as the rate density of all earthquakes above magnitude 5.8 within 70 km of sea level everywhere on earth at 0.1 × 0.1 degree resolution, and it is currently being tested by the Collaboratory for Study of Earthquake Predictability. The seismic component of the present model is based on a smoothed version of the Global Centroid Moment Tensor (GCMT) catalogue from 1977 through 2013. The tectonic component is based on the Global Strain Rate Map, a `General Earthquake Model' (GEM) product. The forecast was optimized to fit the GCMT data from 2005 through 2012, but it also fit well the earthquake locations from 1918 to 1976 reported in the International Seismological Centre-Global Earthquake Model (ISC-GEM) global catalogue of instrumental and pre-instrumental magnitude determinations. We have improved the recent forecast by optimizing the treatment of larger magnitudes and including a longer duration (1918-2011) ISC-GEM catalogue of large earthquakes to estimate smoothed seismicity. We revised our estimates of upper magnitude limits, described as corner magnitudes, based on the massive earthquakes since 2004 and the seismic moment conservation principle. The new corner magnitude estimates are somewhat larger than but consistent with our previous estimates. For major subduction zones we find the best estimates of corner magnitude to be in the range 8.9 to 9.6 and consistent with a uniform average of 9.35. Statistical estimates tend to grow with time as larger earthquakes occur. However, by using the moment conservation

  5. 我国少数民族学生体质的研究现状与展望%On the Current Research Situation and Prospect of Ethnic Minority Students' Physique in China

    Institute of Scientific and Technical Information of China (English)

    王玉洪; 赵平; 周国霞; 耿世能

    2013-01-01

      运用文献法、逻辑分析法、数理统计法等,以1995—2011年间我国少数民族学生体质研究论著为研究样本,按照逻辑学分类方法将检索到全部文献从研究对象所涉及的地域和民族、当前少数民族学生体质热点研究领域和少数民族学生体质现状,全面剖析我国少数民族学生体质研究的基本状况及其特点,并对存在的问题进行评述,据此提出了发展我国少数民族学生体质研究的建议。%  By means of the literature issued, logical analysis, mathematical statistics, the physical study of the minority students in China in the years 1995-2011 on the samples retrieved all papers involved in the study of geographical and ethnic classification in accordance with the comprehensive analysis of the current minority students 'hotspot in the fields of basic conditions and characteristics of physical studies of minority students in China, and the problems are reviewed, pursuant to the recommendations of the development of China's ethnic minority students' physique.

  6. Haptic perception of force magnitude and its relation to postural arm dynamics in 3D.

    Science.gov (United States)

    van Beek, Femke E; Bergmann Tiest, Wouter M; Mugge, Winfred; Kappers, Astrid M L

    2015-12-08

    In a previous study, we found the perception of force magnitude to be anisotropic in the horizontal plane. In the current study, we investigated this anisotropy in three dimensional space. In addition, we tested our previous hypothesis that the perceptual anisotropy was directly related to anisotropies in arm dynamics. In experiment 1, static force magnitude perception was studied using a free magnitude estimation paradigm. This experiment revealed a significant and consistent anisotropy in force magnitude perception, with forces exerted perpendicular to the line between hand and shoulder being perceived as 50% larger than forces exerted along this line. In experiment 2, postural arm dynamics were measured using stochastic position perturbations exerted by a haptic device and quantified through system identification. By fitting a mass-damper-spring model to the data, the stiffness, damping and inertia parameters could be characterized in all the directions in which perception was also measured. These results show that none of the arm dynamics parameters were oriented either exactly perpendicular or parallel to the perceptual anisotropy. This means that endpoint stiffness, damping or inertia alone cannot explain the consistent anisotropy in force magnitude perception.

  7. Epidemiology, clinical and laboratory characteristics of currently alive HIV-1 infected former blood donors naive to antiretroviral therapy in Anhui Province, China

    Institute of Scientific and Technical Information of China (English)

    XU Jian-qing; SU Bing; DING Xin-ping; GAO Bing; GU Yong-bin; CAO Xiao-yun; XING Hui; HONG Kun-xue; PENG Hong; ZHAO Quan-bi; YUAN Lin; WANG Jian-jun; FENG Yi; ZHANG Gui-yun; MA Li-ying; WU Lan; SHAO Yi-ming; HAN Li-feng; XU Chen; RUAN Yu-hua; XU Zhen-hou; CHEN Xi; LIU Zhen-dong; WANG Jun

    2006-01-01

    Background Unregulated commercial blood/plasma collection among farmers occurred between 1992 and 1995 in central China and caused the second major epidemic of human immunodeficiency virus type 1 (HIV-1)infection in China. It is important to characterize HIV-1-infected former blood donors and to study characteristics associated with disease progression for future clinical intervention and vaccine development.Methods A cross-sectional study was performed on HIV-1-infected former blood donors (FBDs) and age-matched HIV-seronegative local residents. Demographic, epidemiologic, clinical and key laboratory data were collected from all study participants. Both unadjusted and adjusted multivariate linear regressions were employed to analyze the association of the decrease of CD4+ T-cell counts with other characteristics.Results Two hundred and ninety-four HIV-1-infected FBDs and 59 age-matched HIV-seronegative local residents were enrolled in this study. The unregulated blood/plasma collection occurred more than a decade (10.8- 12.8 years) ago, which caused the rapid spread of HIV-1 infection and the high prevalence of co-infection with hepatitis C virus (HCV, 89.5%); hepatitis B virus (HBV) co-infection was observed in only 11 HIV+participants (3.7%). Deterioration in both clinical manifestation and laboratory parameters and increase of viral loads were observed in parallel with the decrease of CD4+ T-cell counts. The decrease of total lymphocyte counts (P<0.001)and hemoglobin levels (P<0.001) and the appearance of dermatosis (P=0.03) were observed in parallel with the decrease of CD4+ T-cell counts whereas viral loads (P<0.001) and CD8+ T-cell counts (P=0.01) were inversely associated with CD4+ T-cell counts.Conclusions Co-infection with HCV but not HBV is highly prevalent among HIV-1-infected FBDs. CD4+ T-cell counts is a reliable indicator for disease progression among FBDs. Total lymphocyte counts, hemoglobin level and appearance of dermatosis were positively

  8. Current status of safe injection and progress of management in China%我国安全注射的研究现状及管理进展

    Institute of Scientific and Technical Information of China (English)

    张慧; 尹维佳; 乔甫; 朱仕超; 李婧闻; 黄静; 宗志勇

    2015-01-01

    OBJECTIVE Unsafe injection is a significant public health and safety problem ,particularly in developing countries .This article comprehensively introduced the definition of safe injection ,summarized the problems in the injection in China ,including injection abuse ,high frequent incidents of iatrogenic infections and sharp injuries caused by unsafe injections ,and unreasonable disposal of medical waste ,and figured out the possible reasons of unsafe injections which included lack of knowledge and consciousness of safe injection ,lack of effective injection method and equipment ,the economic interests leading to injection abuse ,and lack of safety injection supervision systems ,indicating that the safe injection management is a system engineering ,involving many aspects of national policies and regulations ,the baseline survey ,education and training ,product and technology improvement ,super‐vision and management .Effective measures should be taken actively to promote continuous improvement of quality of safe injection so as to guarantee the safety of injection in China .%目的:不安全注射已成为严重的公共卫生安全问题,发展中国家尤为突出,该综述介绍了安全注射的定义,简述了我国目前存在注射滥用、不安全注射导致医源性感染事件频发、锐器伤高发及医疗废物处置不合理等不安全注射问题,指出影响安全注射的可能原因为缺乏安全注射的意识与知识、缺乏有效方法和设备、经济利益趋势导致注射滥用以及缺乏安全注射监管体系等,并分析表明安全注射的管理是系统工程,涉及到国家政策和法规、基线调查、教育培训、产品和技术改进及监督管理等多方面,应积极采取有效措施,推动和促进我国安全注射质量的持续改进,保障注射安全。

  9. Current status and development of coal geophysical technology in China%中国煤炭物探技术的现状与发展

    Institute of Scientific and Technical Information of China (English)

    程建远; 石显新

    2013-01-01

    6 prominent progresses and developments had been made in coal and mine geophysical technique in recent years,namely popularization for 3D seismic application; seismic data fine processing and interpretation dynamically;new spanning has been taken from structural to lithological explanation for seismic; ground TEM technology has been widely used; attention was regained for underground geophysics and innovations have been achieved for embedded labeled service mode has been used in coal mine safety production guarantee.By making the comparison between China and oversea technological levels in coal geophysics,the shortcomings had been pointed out and suggestions on how to improve geophysical technology in China had been put forward.In the end,outlooks for future geophysical technique and equipment were predicted in the paper.%总结了近年来我国煤田物探与矿井物探技术的6大突出进展,即三维地震应用领域不断扩大、地震资料精细处理与动态解释得到推广、地震勘探正在实现从构造勘探向岩性勘探的跨越、地面瞬变电磁技术得到广泛应用、矿井物探技术重新得到重视、以“嵌入式”服务为标志的煤矿安全生产地质保障模式出现了可喜创新等;通过与国内外同类技术发展水平的对比分析,找出了我们存在的差距,提出了加快我国煤炭物探技术发展的对策与建议,并对今后煤炭物探技术与装备的发展前景进行了展望.

  10. Current situation of endemic status, prevention and control of neglected zoonotic diseases in China%被忽视的人畜共患病在我国的流行及防控现状

    Institute of Scientific and Technical Information of China (English)

    刘璐; 朱宏儒; 杨国静

    2013-01-01

    被忽视的人畜共患病不仅严重威胁人类尤其是贫困地区畜禽养殖户的健康,且造成了巨大的经济损失.本文对被忽视的人畜共患病(狂犬病、牛结核病、布鲁氏菌病、炭疽、钩端螺旋体病、棘球蚴病、囊尾蚴病、利什曼病和肝片吸虫病)在我国的流行及防治现状进行了概述,旨在为我国更好地防控乃至消灭上述疾病提供流行病学信息.%Neglected zoonotic diseases not only threaten the health of human,especially to the livestock keepers in povertystricken areas but also cause great economic losses to the animal husbandry.This paper reviews the current situation of the endemic status,prevention and control of neglected zoonotic diseases existing in China including rabies,bovine tuberculosis,brucellosis,anthrax,leptospirosis,echinococcosis,cysticercosis,leishmaniasis and fascioliasis,so as to provide the basic information for better controlling,even eliminating,the neglected zoonotic diseases in China.

  11. 气流输送式条播机现状及我国应用情况分析%Analysis of Air Seed Drill Current Situations and Using Situation in China

    Institute of Scientific and Technical Information of China (English)

    杨慧; 刘立晶; 周军平; 赵郑斌; 赵金辉

    2013-01-01

    气流输送式条播机具有减少钢材使用量、增加作业幅宽和提高作业效率等优点,是未来条播机主要发展机型。为此,对气流输送式条播机的国内外技术现状、种类及在我国应用中存在的问题进行了分析。结果表明:国外气流输送式播种技术已经成熟并广泛应用,我国仅处于实验室研究阶段,试制产品还未推广应用,且对技术的理论研究很少。%Air seed drills have many advantages which can reduce the use quantity of steel , increase working width , im-prove efficiency etc .It will be the main form of future seeders .The current research status at home and abroad , classifi-cations and problems existing in China of air seed drills were analyzed .Analysis showed that the technology of air seed drills at abroad had been very successful and widely used .However , the study in China was still in laboratory stage , the product had not been applied , and it lacked of theoretical study .

  12. Current Status and Challenges ofLeptospira Vaccine Development in China%我国钩端螺旋体疫苗的发展现状与挑战

    Institute of Scientific and Technical Information of China (English)

    徐颖华; 辛晓芳

    2015-01-01

    目的:总结分析我国钩端螺旋体的发展现状以及面临的问题与挑战。方法:根据国内外文献材料进行整理、归纳和分析。结果与结论:应解决钩体疫苗发展中面临的一些困境,进一步优化我国钩体疫苗,从而保证国家扩大计划免疫规划成功实施。%Objective: To analyze and summarize current status as well as problems and challenges of Leptospira vaccine development in China.Methods: The relevant domestic and international literatures were sorted, analyzed and summarized.Results and Conclusion: The problems in Leptospira vaccine development should be solved, and this vaccine product in China should be further optimized, so as to ensure the successful implementation of national program on expanded immunization.

  13. Current status of patent technologies of coke oven gas to natural gas in China%国内焦炉气制天然气专利技术发展现状

    Institute of Scientific and Technical Information of China (English)

    杜雄伟

    2012-01-01

    Current status of patent technologies of coke oven gas to natural gas in China is described in this paper. Two main production processes of coke oven gas to natural gas are analyzed, named " coke oven gas methanation to natural gas" process and "coke oven gas purification and separation to natural gas" process. Patent applications of conversion technologies from coke oven gas to natural gas by organizations or individuals who have the technologies in China are introduced. It is pointed out that the project implementation of coke oven gas to natural gas has a very important significance for coking industry to develop energy-saving and emission-reduction circular economy.%综述了国内焦炉气制天然气专利技术发展现状,分析了国内焦炉气制天然气技术的2种主要工艺,“焦炉气甲烷化制备天然气”工艺和“焦炉气联合净化分离制备天然气”工艺.介绍了目前国内焦炉气制天然气技术拥有单位或个人专利申请情况,指出焦炉气制天然气项目的实施对焦化行业节能减排及发展循环经济等具有重要意义.

  14. 关于我国瓦斯治理现状及存在问题的分析%Analysis on the Current Situation and Problems of China's Gas Management

    Institute of Scientific and Technical Information of China (English)

    范衡

    2014-01-01

    随着我国煤矿开采深度的不断加大,煤层的透气性逐渐降低,而瓦斯的压力、浓度、放散量和速度则不断升高,因此加大瓦斯治理力度尤为关键。本文我们将针对当前我国煤矿瓦斯治理的现状,针对当前工作中存在的问题,提出煤矿瓦斯治理工作方面的意见和措施,以期能够提高煤矿的安全性,减少煤矿瓦斯事故的发生。%Along with the mining depth increasing in China, the permeability of coal decreases gradually, while the gas pressure, concentration, amount of diffuse and speed have increased, so increasing gas harness force is the key. This paper focus on the current coal mine gas control in China, and aiming at the existing problem in the work, opinions and measures of coal mine gas control are put forward, in order to improve the safety of coal mine and reduce the occurrence of coal mine gas accident.

  15. The Current Situation 、Questions and Thinking of Increasing Enrollment of Institute of Higher Learning in China%我国高等院校扩招的现状、问题及思考

    Institute of Scientific and Technical Information of China (English)

    洪柳

    2012-01-01

    1998年我国高校扩招后,全国普通高校招生计划一直呈增长趋势。我国高等院校招生规模不断扩大。针对我国高等院校扩招的现状,分析我国高等院校扩招后出现的高文凭现象和就业难问题,对我国高等院校扩招后出现的问题进行了思考。%As the increasing enrollment of institute of higher learning after 1998, the plan of enrollment of institute of higher learning goes up. The author pays attention to the reality of continuous increasing enrollment of institute of higher learning. The paper elaborates the current situation of increase enrollment of institute of higher learning, analyzes the phenomenon of high diploma and questions of employment difficulties after increasing enrollment of institute of higher learning in china, considering the questions of increase enrollment of institute of higher learning in china.

  16. Current Status and Future Development of Watermelon Seed Production and Processing in China%我国西瓜种子生产加工处理现状及发展趋势

    Institute of Scientific and Technical Information of China (English)

    戴思慧; 熊兴耀; 孙小武; 肖杰; 罗伏青

    2012-01-01

    We discusses the international challenges, current status and problems of watermelon seed production and seed processing in China in this article. Some suggestions were given for the development of watermelon seed production and seed processing in China. The progress and competitiveness of watermelon produce industry and seed industry are heavily dependent on high seed quality achieved through best seed production practices and best seed processing technologies.%概述了我国西瓜种子生产加工技术发展面临的国际挑战、发展现状和存在的问题,对我国西瓜种子加工技术今后的发展方向提出了建议,认为提高西瓜种子生产和加工水平,实现其精细加工,才能提高我国西瓜种子质量和市场竞争力,促进西瓜种业进一步发展.

  17. 中国生态补偿的现状与趋势%Current Status and Future Trends for Eco-compensation in China

    Institute of Scientific and Technical Information of China (English)

    谢高地; 曹淑艳; 鲁春霞; 张昌顺; 肖玉

    2015-01-01

    Eco-compensation, known as payment for ecosystem services, is defined in China as an institutional arrangement for regulating the relationship of economic interests among ecological protectors, beneficiaries and destructors in order to protect ecological service function and foster harmony between people and nature with non-market and market tools including transfer payment, taxes and fees. Reasonable compensation to ecological service providers significantly contributes to the protection of ecological assets and effective supply of ecological services by adopting transfer payments or market transactions on the basis of comprehensively considering the costs of ecological protection, costs of development opportunity and ecological service values. It is helpful for implementing a strategy for main functional areas. The building of eco-compensation mechanisms is therefore highly valued as the most important institutional guarantee for promoting the ecological civilization. Existing eco-compensation mechanisms mainly fall into three categories: exchequer based transfer payment, vertical and horizontal, and market based compensation in China. The institutional framework has been primarily established, inclusive of a forest ecological benefit compensation fund system, grassland eco-compensation system and transfer payment system of national key ecological function areas. Under the framework, various areas and departments have actively explored the building of an eco-compensation system and achieved important progress for forests, grassland, wetlands, river basins and water resources, exploitation of mineral resources, oceans and national key ecological functions areas. However, the eco-compensation system dominated by vertical transfer payments is stil far from perfect in China. The interest regulation pattern of"developer to protect and beneficiary to compensate" has not been formed. Its role in the protection of the ecological environment has not been brought into full

  18. Current status and some thoughts for graphite electrode exporting from China%我国石墨电极出口现状及思考

    Institute of Scientific and Technical Information of China (English)

    魏朝永

    2012-01-01

    介绍了我国石墨电极出口规模、出口创汇、出口地理分布、出口主体、出口结构、出口经营模式以及出口依存度的现状,指出石墨电极在出口经营中存在着战略不清晰、人民币升值削弱出口竞争力以及销售服务跟不上和出口秩序混乱等问题,提出了应对方略.%The present situations of export scale, earning of foreign exchange, main bodies, geographical distribution, composition and business modes of graphite electrodes in China were introduced. It was pointed out that the existing strategy was not clear, the appreciation of RMB weakened the export competitiveness, sale service was not enough and export order has problems, and the solutions for them were figured out.

  19. On the Current Level of Macro Tax Burden in China%我国当前宏观税负水平评析

    Institute of Scientific and Technical Information of China (English)

    杜薇

    2012-01-01

    The past decade has witnessed a superuormal growth of tax revenuem,which aroused among people of all circles a fierce debate on whether or not tax should be reduced. In fact, the measurement of tax burden should be based on the minor standard of totalizing tax revenue and costs of social security, and on a comparison with other countries in the world. It is, therefore, urgent for China now to flexibly adjust the structure of tax system in order to optimize this system, balance tax burden and stimulate the development of economy.%近十年采,我国税收收入呈现超常增长的态势。社会各界对是否应该减税展开了激烈的讨论。衡量税负水平应采取税收收入加社保费用的小口径标准,并和世界上其他国家进行比较。我国需要对税制进行有增有减的结构性调整,以达到优化税制、公平税负、刺激经济发展的目的。

  20. Review on Current Literature of Ecological Society Research in China%当前国内关于生态社会研究的文献综述

    Institute of Scientific and Technical Information of China (English)

    邓永芳; 胡文娟

    2013-01-01

    With the global spread of ecological crisis, China speeds up the step of ecological civilization construction, the academic circle pay attention to the ecological society. On the basis of defining the concept of " ecology society" , the basic characteristics, social development stage, and approach for construction of ecological society were studied, obtaining theoretical achievements.%随着生态危机的全球性蔓延,我国加快了生态文明建设的步伐,学术界给予“生态社会”以应有的关注和重视.该文在当前国内学术界对“生态社会”概念界定的基础上,对其基本特征、所处社会发展阶段以及构建“生态社会”的途径等方面进行了较为系统的研究,取得了一些理论成果.

  1. 中国青年旅舍设计现状及趋势%Talking about the Design of Current Situation and Trend of the China Youth Hostel

    Institute of Scientific and Technical Information of China (English)

    全惠民; 何璇

    2016-01-01

    In this paper, base on the design status that the number, distribution, type, style, advantages and disadvantages of the youth inn in China, the author has carried on the preliminary investigation. The author proposes a method from the aspect of fine design, diversified design to fit the development of our youth inn by referring to the design concept and the design methods of youth hostel in the developed countries.%本文针对近年中国逐渐增多的青年旅舍的数量、分布、类型、风格、优缺点等设计现状,进行初步的调查,同时参考发达国家青年旅舍的设计理念设计方法从精细化设计,多元化设计等方面,提出适合我国青年旅舍发展的模式。

  2. Analysis of Current Rural Food Hygiene Supervision and Management in China%浅析我国当前农村食品卫生监督管理

    Institute of Scientific and Technical Information of China (English)

    王春玲

    2015-01-01

    Objective To explore the effective measures to strengthen the food hygiene supervision and management. Methods Through the focus,quality, cooperation,education and other methods,gradual y improve the health surveil ance and disease control system in our country. Results The health supervision and law enforcement work gradual y into the legal track. Conclusion To take effective regulatory measures,to improve China's rural food hygiene supervision and management,and effectively solve the food safety problems of peasants.%目的:探讨加强农村食品卫生监督管理的有效措施。方法通过抓重点、提素质、强合作、重普及等方法,逐步完善我国的卫监与疾控体制。结果使卫生的监督执法工作逐渐步入法制化的轨道。结论采取有效的监管措施,能够提高我国农村食品卫生监督和管理工作,切实解决广大农民的食品卫生安全问题。

  3. Plasma fluctuations in a Kaufman thruster. [root mean square magnitude, spectra and cross correlation

    Science.gov (United States)

    Serafini, J. S.; Terdan, F. F.

    1973-01-01

    Measurements of the RMS magnitude, spectra and cross-correlations for the fluctuations in the beam, discharge and neutralizer keeper currents are presented for a 30-cm diameter dished grid ion thrustor for a range of magnetic baffle currents and up to 2.0 amperes beam current. The ratio of RMS to mean ion beam current varied from 0.04 to 0.23. The spectra of the amplitudes of the beam and discharge current fluctuations were taken up to 9 MHz and show that the predominant amplitudes occur at frequencies of 10 kHz or below. The fall-off with increasing frequency is rapid. Frequencies above 100 kHz the spectral levels are 45 kb or more below the maximum peak amplitudes. The cross-correlations revealed the ion beam fluctuations to have large radial and axial scales which implied that the beam fluctuates as a whole or 'in-phase.' The cross-correlations of the beam and neutralizer keeper current fluctuations indicated the neutralizer contributions to the beam fluctuations to be small, but not negligible. The mode of operation of the thrustor (values of beam and magnetic baffle currents) was significant in determining the RMS magnitude and spectral shape of the beam fluctuations. The major oscillations were not found to be directly dependent on the power conditioner inverter frequencies.

  4. Risk behaviors, prevalence of HIV and hepatitis C virus infection and population size of current injection drug users in a China-Myanmar border city: results from a Respondent-Driven Sampling Survey in 2012.

    Directory of Open Access Journals (Sweden)

    Lei Li

    Full Text Available BACKGROUND: Injection drug use has been the major cause of HIV/AIDS in China in the past two decades. We measured the prevalences of HIV and hepatitis C virus (HCV prevalence and their associated risk factors among current injection drug users (IDUs in Ruili city, a border region connecting China with Myanmar that has been undergoing serious drug use and HIV spread problems. An estimate of the number of current IDUs is also presented. METHODS: In 2012, Chinese IDUs who had injected within the past six months and aged ≥ 18 years were recruited using a respondent-driven sampling (RDS technique. Participants underwent interviews and serological testing for HIV, HBV, HCV and syphilis. Logistic regression indentified factors associated with HIV and HCV infections. Multiplier method was used to obtain an estimate of the size of the current IDU population via combining available service data and findings from our survey. RESULTS: Among 370 IDUs recruited, the prevalence of HIV and HCV was 18.3% and 41.5%, respectively. 27.1% of participants had shared a needle/syringe in their lifetime. Consistent condom use rates were low among both regular (6.8% and non-regular (30.4% partners. Factors independently associated with being HIV positive included HCV infection, having a longer history of injection drug use and experience of needle/syringe sharing. Participants with HCV infection were more likely to be HIV positive, have injected more types of drugs, have shared other injection equipments and have unprotected sex with regular sex partners. The estimated number of current IDUs in Ruili city was 2,714 (95% CI: 1,617-5,846. CONCLUSIONS: IDUs may continue to be a critical subpopulation for transmission of HIV and other infections in this region because of the increasing population and persistent high risk of injection and sexual behaviours. Developing innovative strategies that can improve accessibility of current harm reduction services and incorporate

  5. Strategic assessment of the magnitude and impacts of sand mining in Poyang Lake, China

    NARCIS (Netherlands)

    Leeuw, de J.; Shankman, D.; Wu, G.; Boer, de W.F.; Burnham, J.; He, Q.; Yesou, H.; Xiao, J.

    2010-01-01

    Planning for the extraction of aggregates is typically dealt with at a case to case basis, without assessing environmental impacts strategically. In this study we assess the impact of sand mining in Poyang Lake, where dredging began in 2001 after sand mining in the Yangtze River had been banned. In

  6. The Current Situation of China's Peat industry and the Development of Peat Standardization%浅论我国泥炭产业现状及泥炭标准化发展

    Institute of Scientific and Technical Information of China (English)

    闫木林

    2011-01-01

    本文阐述了国内和国外泥炭产业的发展现状,分析了泥炭产业对发展循环经济,促进可持续发展的重要性和泥炭产业发展的资源、环境问题,以及现今泥炭标准化的发展现状.指出了我国泥炭行业标准化存在的问题,并提出了相应发展方向和对策.%In this paper, domestic and foreign industry development in peat, peat industry analysis for thedevelopment of recycling economy and promote the importance of sustainable development, industrialdevelopment and peat resources, environmental issues, as well as standardization of the current developmentstatus of peat. That the peat industry standardization of China's problems, and the corresponding direction andstrategies.

  7. A Study on the Current Situation and Countermeasures for Food Cold Chain Logistics Development in China%我国食品冷链物流发展现状与对策研究

    Institute of Scientific and Technical Information of China (English)

    胡成琳

    2015-01-01

    Based on analyzing the urgency of developing food cold chain logistics,this study further reviews its current situation from the view point of industrial development, personnel and equipment status, and operation and management. Consequently,we prescribe relevant measures for the developing China's food cold chain logistics.%在分析发展食品冷链物流迫切性的基础上,又进一步从产业发展、人才和设备现状,以及运作和管理方面对我国食品冷链物流的现状进行分析,从而提出了我国发展食品冷链物流的相关措施。

  8. 我国政民网络反腐互动的历史与现状研究%Study on the History and Current Situation of the Interaction Between Government and Citizen of China in Network Anti-corruption

    Institute of Scientific and Technical Information of China (English)

    袁玥

    2014-01-01

    近年来,信息灵通、触角敏锐的网络媒体在反腐中的作用日益凸显,我国网络反腐也逐步跨越纯粹的自发性行为阶段,开始呈现出政民互动的良好局面。文章简要介绍了我国网络反腐中政民互动的历史与现状,并对广州番禺“房叔”蔡彬案中的政民互动进行解析,以期推动我国网络反腐中政民互动机制的建立。%In recent years,network media which is well-informed and sensitive plays an increasingly prominent role in the anti-corruption. Meanwhile, the current network anti-corruption of China has gradually crossed the pure phase of spontaneous behavior and went into a good stage when the government and citizen began to interact and cooperate. This paper briefly introduces the history and current situation of the interaction between government and citizen of china in network anti-corruption,and analyses the government-citizen’s interaction in the case of Cai Bin so as to promote the process of the mechanism’s establishing of government-citizen’s interaction in China’s network anti-corruption.

  9. Determination of magnitude and epicenter of historical earthquakes on the Trans Mexican Volcanic Belt

    Science.gov (United States)

    Suarez, G.; Jiménez, G.

    2013-12-01

    Two large earthquakes occurred in the Trans Mexican Volcanic Belt (TMVB) in the XXth century. A Mw 6.9 earthquake took place near the town of Acambay in 1912 and in 1920 an event near the city of Jalapa had a magnitude of Mw 6.4. Both events took place in the crust and reflect the tectonic deformation of the TMVB. In addition to these two instrumental earthquakes, the historical record in Mexico, which spans approximately the past 450 years, has a large volume of macroseismic information suggesting the presence crustal earthquakes similar to those that took place in 1912 and 1920. The catalog of macroseismic data in Mexico was carefully reviewed, searching for the presence of crustal events in the TMVB. In total, twelve potential earthquakes were identified. The data was geo-referenced, a magnitude was assigned in the Modified Mercalli Scale (MMS) and events were collated based on the dates reported by the references. The method developed by Bakun and Wentworth (1997) was used to estimate the magnitude and epicentral location of these historical earthquakes. Considering that only two instrumental earthquakes of similar magnitudes exist, it was not possible to construct an attenuation calibration curve of magnitude versus distance. Instead, several published attenuation curves were used. The calibration curve determined for California yielded the best results for both magnitude and epicentral location for the XXth century events. Using this calibration curve, the magnitude and location of several historical events was determined. Our results indicate that over the past 450 years, at least six earthquakes larger than magnitude M 6 have occurred on the TMVB. Three of these, the earthquakes of 1568, 1858 and 1875, appear to have a magnitude larger than M 7. Furthermore, the distribution of these historical earthquakes spans the TMVB in its entirety, and is not restricted to specific areas. The presence of these relatively large, crustal events that take place near the

  10. Magnitude corrections for attenuation in the upper mantle

    International Nuclear Information System (INIS)

    Since 1969, a consistent discrepancy in seismic magnitudes of nuclear detonations at NTS compared with magnitudes of detonations elsewhere in the world has been observed. This discrepancy can be explained in terms of a relatively high seismic attenuation for compressional waves in the upper mantle beneath the NTS and in certain other locations. A correction has been developed for this attenuation based on a relationship between the velocity of compressional waves at the top of the earth's mantle (just beneath the Mohorovicic discontinuity) and the seismic attenuation further down in the upper mantle. Our new definition of body-wave magnitude includes corrections for attenuation in the upper mantle at both ends of the teleseismic body-wave path. These corrections bring the NTS oservations into line with measurements of foreign events, and enable one to make more reliable estimates of yields of underground nuclear explosions, wherever the explosion occurs

  11. Modeling of magnitude distributions by the generalized truncated exponential distribution

    CERN Document Server

    Raschke, Mathias

    2014-01-01

    The probability distribution of the magnitude can be modeled by an exponential distribution according to the Gutenberg-Richter relation. Two alternatives are the truncated exponential distribution (TED) and the cut-off exponential distribution (CED). The TED is frequently used in seismic hazard analysis although it has a weak point: When two TEDs with equal parameters excepting the upper bound magnitude are mixed, then the resulting distribution is not a TED. Inversely, it is also not possible to split a TED of a seismic region in TEDs of sub-regions with equal parameters excepting the upper bound magnitude. This weakness is a principal problem as seismic regions are constructed scientific objects and not natural units. We overcome it by the generalization of the above-mentioned exponential distributions: the generalized truncated exponential distribution (GTED). Therein, identical exponential distributions are mixed by the probability distribution of the correct cut-off points. This distribution model is fle...

  12. Newmark design spectra considering earthquake magnitudes and site categories

    Science.gov (United States)

    Li, Bo; Xie, Wei-Chau; Pandey, M. D.

    2016-09-01

    Newmark design spectra have been implemented in many building codes, especially in building codes for critical structures. Previous studies show that Newmark design spectra exhibit lower amplitudes at high frequencies and larger amplitudes at low frequencies in comparison with spectra developed by statistical methods. To resolve this problem, this study considers three suites of ground motions recorded at three types of sites. Using these ground motions, influences of the shear-wave velocity, earthquake magnitudes, source-to-site distances on the ratios of ground motion parameters are studied, and spectrum amplification factors are statistically calculated. Spectral bounds for combinations of three site categories and two cases of earthquake magnitudes are estimated. Site design spectrum coefficients for the three site categories considering earthquake magnitudes are established. The problems of Newmark design spectra could be resolved by using the site design spectrum coefficients to modify the spectral values of Newmark design spectra in the acceleration sensitive, velocity sensitive, and displacement sensitive regions.

  13. Current Status of Studies on Urban Wetland Park in China%中国城市湿地公园研究现状

    Institute of Scientific and Technical Information of China (English)

    张庆辉; 赵捷; 朱晋; 程莉; 海全胜; 同丽嘎

    2013-01-01

    The urban wetland park(UWP) was an important part of urban green space and urban water systems in Eco-city construction, which has attracted widespread attention of the whole society and access to extensive development, in the rapid momentum of development of the East China especially, but the basic theoretical research is still relatively lacking which guide the urban wetland park construction and protection. The geographic distribution characteristics and development status was analyzed of the urban wetland park by statistics, on this basis, analyzing the research perspective and updated progress on the urban wetland park. Against the problems in the development of the urban wetland park, pointing out the next major research direction and content of the urban wetland park. The research results provide a theoretical reference for the construction, development and protection of the urban wetland park.%城市湿地公园是生态型城市建设中城市绿地系统和城市水系统的重要组成部分,已引起全社会的普遍重视,并获得广泛发展,尤其在华东地区发展势头较快,但是,指导中国城市湿地公园建设与保护的基础理论研究还比较缺乏.因此,通过统计分析中国城市湿地公园的地理布局特征、发展现状,综合分析了近年来对城市湿地公园的研究视角与最新进展.针对城市湿地公园发展中存在的问题,指出城市湿地公园未来主要的研究方向和内容.

  14. 中国中草药饲料添加剂的现状与展望%Current Status and Prospect of Chinese Herbal Feed Additives in China

    Institute of Scientific and Technical Information of China (English)

    2013-01-01

    This review summarizes the present situation of research, development and application of the Chinese herbal feed additives and its prospect. It can provide scientific references for researchers to carry out in-depth study. Chinese herbal feed additives will hopefully solve problems such as antibiotic residues, environmental pollu-tion, low productivity which hinders the development of livestock and provides strong support for developing green husbandry, meeting the food safety demand, closing the gap of livestock between the developed countries and Chi-na, increasing competitiveness of Chinese animal products in world markets. The development of Chinese herbal feed additives have very important economic and social benefits.%  本文综述了中草药饲料添加剂的研究、开发和应用现状及其发展前景,为研究者继续深入开展研究提供科学的参考。中草药添加剂有望解决长期困扰畜牧业发展的抗生素残留、提高生产率低、环境污染、安全性等问题,为发展绿色畜牧业、满足人民的食品安全需求、缩小我国畜牧业与发达国家的差距、增强我国畜产品在国际市场的竞争力提供有力支持,中草药饲料添加剂的发展具有重要的经济社会效益。

  15. 我国具身认知研究现状与未来进路%Current Situation and Future Trends of Embodied Cognition Research in China

    Institute of Scientific and Technical Information of China (English)

    赵蒙成; 王会亭

    2015-01-01

    Embodied cognition is a new field of psychology and education research, and some achievements have been made in China, including the connotations, characteristics, ideological origins, effects and applications in education, which profoundly deepens the people' s related understanding. However, there are also some defects among the researches. For example, the systems of research are very chaotic, the modes of thinking are linear, the empirical and applied researches are very rare and the simple imitations of foreign relevant research output are very obvious. From now on, in our research, we should agree on the systems of research, have a dialectical thinking, strengthen the empirical and applied researches and seek for the localization.%具身认知是我国心理学及教育学研究的一个新兴领域,且已取得了一些初步的研究成果,涉及具身认知的内涵、特征、思想渊源、效应、在教育中的应用等,深化了人们的相关认识. 但相关研究也存在研究思潮凌乱散漫、研究思维点状割裂、实证和应用研究匮乏、简单搬套西方相关成果等不足. 今后的研究应统一研究纲领、秉持辩证思维、强化实证和应用研究、加强本土化追求.

  16. 我国现行会计准则存在的问题及对策研究%The Problems of China's Current Accounting Standards and Countermeasures

    Institute of Scientific and Technical Information of China (English)

    于婧婧

    2014-01-01

    China's accounting standards now have some problems. The defined scopes of the assets need to extend and divide meticulous-ly. The vague provisions of contingent amounts payable need to confirm following the principle of prudence principle of accounting. The use of fair value needs to adopt prudence principle and consider the actual. Facing the problems of identification of non-monetary assets exchange and tax, accounting standards should give an accurate concept and definition, so as to make up for the deficiency.%目前,我国会计准则中资产的界定范围、或有事项处理、公允价值计量与非货币性资产交换等方面存在的问题主要是对资产的定义有待扩展,进行细致划分;或有应付金额确认的规定存在模糊,应该遵照会计的谨慎性原则进行确认;对公允价值的运用既要采用谨慎性原则,还要考虑实际;在处理非货币的资产交换认定和税费的问题时,会计准则应给出一个准确的概念和定义,进而补充各项会计准则的不足之处。

  17. Magnitude comparison with different types of rational numbers.

    Science.gov (United States)

    DeWolf, Melissa; Grounds, Margaret A; Bassok, Miriam; Holyoak, Keith J

    2014-02-01

    An important issue in understanding mathematical cognition involves the similarities and differences between the magnitude representations associated with various types of rational numbers. For single-digit integers, evidence indicates that magnitudes are represented as analog values on a mental number line, such that magnitude comparisons are made more quickly and accurately as the numerical distance between numbers increases (the distance effect). Evidence concerning a distance effect for compositional numbers (e.g., multidigit whole numbers, fractions and decimals) is mixed. We compared the patterns of response times and errors for college students in magnitude comparison tasks across closely matched sets of rational numbers (e.g., 22/37, 0.595, 595). In Experiment 1, a distance effect was found for both fractions and decimals, but response times were dramatically slower for fractions than for decimals. Experiments 2 and 3 compared performance across fractions, decimals, and 3-digit integers. Response patterns for decimals and integers were extremely similar but, as in Experiment 1, magnitude comparisons based on fractions were dramatically slower, even when the decimals varied in precision (i.e., number of place digits) and could not be compared in the same way as multidigit integers (Experiment 3). Our findings indicate that comparisons of all three types of numbers exhibit a distance effect, but that processing often involves strategic focus on components of numbers. Fractions impose an especially high processing burden due to their bipartite (a/b) structure. In contrast to the other number types, the magnitude values associated with fractions appear to be less precise, and more dependent on explicit calculation. PMID:23750968

  18. Aftershock Hazard Magnitude, Time, and Location Probability Forecasting

    Directory of Open Access Journals (Sweden)

    Kuei-Pao Chen

    2014-01-01

    Full Text Available This study combines branching aftershock sequence (BASS and modified _ law to develop a predictive model for forecasting the magnitude, time, and location of aftershocks of magnitude Mw ≥ 5.00 in large earthquakes. The developed model is presented and applied to the 17:47 20 September 1999 Mw 7.45 Chi-Chi earthquake Taiwan, 09:32 5 November 2009 (UTC Nantou Mw 6.19, 00:18 4 March 2010 (UTC Jiashian Mw 6.49 earthquake sequences, Taiwan, and 05:46 11 March 2011 (UTC Tohoku Mw 9.00 earthquake, Japan. The estimated peak ground acceleration (PGA results are remarkably similar to calculations from the recorded magnitudes in both trend and level. This study proposes an empirical equation to improve the aftershock occurrence forecast time. The forecast time results were greatly improved. The magnitude of aftershocks generally decreases with time. It was found that the aftershock forecast probability of Mw ≥ 5.00 is high in the first six days after the main shock. The results will be of interest to seismic mitigation specialists. Spatial and temporal seismicity parameters to the aftershock sequence investigation into the 17:47 20 September 1999 (UTC Mw 7.45 Chi-Chi earthquake, Taiwan found that immediately after the earthquake the area closest to the epicenter had a lower b value. This pattern suggests that at the time of the Chi-Chi earthquake, the area closest to the epicenter remained prone to large magnitude aftershocks and strong shaking. With time, however, the b value increased, indicating a reduced likelihood for large magnitude aftershocks.

  19. A catalog of observed nuclear magnitudes of Jupiter family comets

    Science.gov (United States)

    Tancredi, G.; Fernández, J. A.; Rickman, H.; Licandro, J.

    2000-10-01

    A catalog of a sample of 105 Jupiter family (JF) comets (defined as those with Tisserand constants T > 2 and orbital periods P nuclear magnitudes H_N = V(1,0,0). The catalog includes all the nuclear magnitudes reported after 1950 until August 1998 that appear in the International Comet Quarterly Archive of Cometary Photometric Data, the Minor Planet Center (MPC) data base, IAU Circulars, International Comet Quarterly, and a few papers devoted to some particular comets, together with our own observations. Photometric data previous to 1990 have mainly been taken from the Comet Light Curve Catalogue (CLICC) compiled by Kamél (\\cite{kamel}). We discuss the reliability of the reported nuclear magnitudes in relation to the inherent sources of errors and uncertainties, in particular the coma contamination often present even at large heliocentric distances. A large fraction of the JF comets of our sample indeed shows various degrees of activity at large heliocentric distances, which is correlated with recent downward jumps in their perihelion distances. The reliability of coma subtraction methods to compute the nuclear magnitude is also discussed. Most absolute nuclear magnitudes are found in the range 15 - 18, with no magnitudes fainter than H_N ~ 19.5. The catalog can be found at: http://www.fisica.edu.uy/ ~ gonzalo/catalog/. Table 2 and Appendix B are only available in electronic form at http://www.edpsciences.org Table 5 is also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html

  20. Climate variability and increase in intensity and magnitude of dengue incidence in Singapore

    OpenAIRE

    Hii, Yien Ling; Rocklöv, Joacim; Ng, Nawi; Tang, Choon Siang; Pang, Fung Yin; Sauerborn, Rainer

    2009-01-01

    Introduction: Dengue is currently a major public health burden in Asia Pacific Region. This study aims to establish an association between dengue incidence, mean temperature and precipitation and further discuss how weather predictors influence the increase in intensity and magnitude of dengue in Singapore during the period 2000-2007. Materials and methods: Weekly dengue incidence data, daily mean temperature and precipitation and the midyear population data in Singapore during 2000-2007 were...

  1. Neutral currents

    International Nuclear Information System (INIS)

    A short survey of the new experimental data on weak neutral currents is given, followed by a comparison with modern theoretical models. Cross sections of the anti νsub(e)e → anti νsub(e)e, anti νsub(μ)e→ νsub(μ)e, νp → νp and anti νp → anti νp elastic scattering as well as inclusive cross sections of the ν+N → ν+X and anti ν+N → anti ν+X deep inelastic scattering are presented. On the basis of the comparison the Weinberg-Salam model is concluded to be in a good agreement with the shape of the cross sections. Six-quark vector models appear to be ruled out. The five-quark model due to Achiman, Koller and Walsh and two versions of the Gursey-Sikivie model satisfactorily account for the observed data in shape and in magnitude

  2. Current Conditions and Future Considerations of Rehabilitation Organization System for the Disabled in China%我国残疾人康复组织体系研究

    Institute of Scientific and Technical Information of China (English)

    曹跃进; 陈森斌

    2014-01-01

    Rehabilitation organization system for the disabled is the basis of the disability work. Along with the development of disability research and disability work in China, it’s an urgent task of comprehensive review on rehabilitation organization system. China’s rehabilitation organizations include rehabilitation administrative, rehabilitation service and the third party organizations. China’s rehabilitation organization system includes organized management net, technical supporting net and rehabilitation service net. “Socialized” is the biggest characteristic of this system. Due to the changing conditions of undertakings for the disabled, rehabilitation organization system for the disabled have to face with challenges such as reform of work division and business field, impacts from the market and outflow of talents. Therefore, the authors suggest these organizations to prepare in advance. Besides insisting socialized feature, the rehabilitation administrative organizations should keep their core business while giving up the backward; the rehabilitation service organizations should improve their own abilities and the private-owned ones should play more active roles.%随着残疾人研究的深入和残疾人事业的发展,对残疾人康复组织体系的系统梳理迫在眉睫。我国的残疾人康复组织主要包括康复行政组织、康复服务组织和第三方组织,残疾人康复组织体系主要由组织管理网、技术指导网和康复服务网构成,“社会化”是这一组织体系最显著的特点。随着我国残疾人事业的发展,残疾人康复组织将面临业务分工和职能重组、市场冲击和人才流失等挑战。因此,建议残疾人康复组织提前准备,除了应坚持社会化特点之外,残疾人康复行政组织应“有进有退”,残疾人康复服务组织应“苦练内功”,民办残疾人康复机构应发挥更积极作用。

  3. Study on Current Situation and Construction of Local Tax System in China%中国地方税体系现状与构建研究

    Institute of Scientific and Technical Information of China (English)

    朱云飞; 成军

    2013-01-01

    自1994年分税制改革,尤其是2000年我国“十五”规划首次提出“完善地方税税制”以来,10余年过去了,中国的地方税体系仍远未成型。当前,中国增值税扩围、房产税试点和资源税调整等地方税改革已经启动,但进展步伐较慢、效果尚不显著,且未涉及赋税权、设税种、提比重、改机构等地方税体系的核心内容。构建地方税体系,应按照党的“十八大”报告“加快改革财税体制”的总体要求,进一步完善政府间财政关系、优化政府内财政管理,逐步形成符合中国国情的税权相对独立、税种相对完整、收入相对稳定、征管相对协调的地方税体系。%The local tax system of China is still immatare although the division-tax financial system has started its reform since 1994,and the “local tax system perfection plan”was put forward in the Tenth Five-Year Plan in 2000. At present,the reformation of value-added tax,real estate tax and resource tax have already started,but the progress is slow and the effect is not significant. Some of the core contents have not been involved in the reform,such as the tax right,the new tax category,the local income proportion and the institutional reform. According to the requirements of accelerating the reform of taxation system in the report of the 18th National Congress of CPC,to construct the local tax system,we should improve the inter-govern-mental fiscal relations,optimize the internal financial management of the government,and establish a local tax system suiting Chinese situations with relatively independent tax power,relatively complete tax category,rela-tively stable income and relatively harmonious collection management.

  4. 我国信用评级行业现状及前景分析%Current Situation and Prospect of Credit Rating Industry in China

    Institute of Scientific and Technical Information of China (English)

    郭婷婷

    2015-01-01

    This paper analyzed the present situation and features of our country’s credit rating market. According to the development of international rating business and financial market, the prospect of credit rating industry in China was analyzed. This paper believes that the domestic rating industry barrier is weak, but the level of domestic rating business is improving gradually. Because of the domestic slowing economic growth and other factors, relative to the size of financial markets, the demand of domestic credit rating market is still insufficient. Because of the long-term bull regulation , it is difficult to unified supervision departments in the short term. But the national rating agencies are actively trying to enter the international market and successfully enter the EU market , these advances are also worthy of attention. Thus the domestic rating agency is expected to cut a striking figure in the international market.%本文分析了我国信用评级市场现状及特征,并根据金融市场发展情况及国际评级业务发展规律对我国信用评级行业发展前景进行分析,认为:国内评级行业壁垒较低,国内评级水平正逐步提高,但因国内经济增长减缓等因素,相对于金融市场规模,国内信用评级市场有效需求仍显不足;因长期多头监管,短期内难以实质统一监管部门;但是也应关注到民族评估公司正积极尝试进入国际市场并成功进入欧盟市场,有望在国际崭露头角。

  5. Strategy Use and Strategy Choice in Fraction Magnitude Comparison

    Science.gov (United States)

    Fazio, Lisa K.; DeWolf, Melissa; Siegler, Robert S.

    2016-01-01

    We examined, on a trial-by-trial basis, fraction magnitude comparison strategies of adults with more and less mathematical knowledge. College students with high mathematical proficiency used a large variety of strategies that were well tailored to the characteristics of the problems and that were guaranteed to yield correct performance if executed…

  6. DIGITAL FILTER PROCESS DURING THE DISCRETE MAGNITUDE DATA GATHERING

    Institute of Scientific and Technical Information of China (English)

    姚天忠; 邹丽新; 胡冶

    1995-01-01

    We analyze the reason that causes the error during the discrete magnitude data gathering.A method,dealing with data by means of second-order low-pass digital filter,is brought out,which will improve both the smooth degree and the reponse of the data into a quite good state.

  7. Sea ice inertial oscillation magnitudes in the Arctic basin

    Directory of Open Access Journals (Sweden)

    F. Gimbert

    2012-06-01

    Full Text Available An original method to quantify the amplitude of inertial motion of oceanic and ice drifters, through the introduction of a non-dimensional parameter M defined from a spectral analysis, is presented. A strong seasonal dependence of the magnitude of sea ice inertial oscillations is revealed, in agreement with the corresponding annual cycles of sea ice extent, concentration, thickness, advection velocity, and deformation rates. The spatial pattern of the magnitude of the sea ice inertial oscillations over the Arctic basin is also in agreement with the sea ice thickness and concentration patterns. This argues for a strong link between the magnitude of inertial motion on one hand, the dissipation of energy through mechanical processes, and the cohesiveness of the cover on the other hand. Finally, a significant pluri-annual evolution towards greater magnitudes of inertial oscillations in recent years, in both summer and winter, is reported, thus concomitant with reduced sea ice thickness, concentration and spatial extent.

  8. Fraction Development in Children: Importance of Building Numerical Magnitude Understanding

    Science.gov (United States)

    Jordan, Nancy C.; Carrique, Jessica; Hansen, Nicole; Resnick, Ilyse

    2016-01-01

    This chapter situates fraction learning within the integrated theory of numerical development. We argue that the understanding of numerical magnitudes for whole numbers as well as for fractions is critical to fraction learning in particular and mathematics achievement more generally. Results from the Delaware Longitudinal Study, which examined…

  9. Passive seismic monitoring at the ketzin CCS site -Magnitude estimation

    NARCIS (Netherlands)

    Paap, B.F.; Steeghs, T.P.H.

    2014-01-01

    In order to allow quantification of the strength of local micro-seismic events recorded at the CCS pilot site in Ketzin in terms of local magnitude, earthquake data recorded by standardized seismometers were used. Earthquakes were selected that occurred in Poland and Czech Republic and that were det

  10. Absolute magnitudes and phase coefficients of trans-Neptunian objects

    CERN Document Server

    Alvarez-Candal, A; Ortiz, J L; Duffard, R; Morales, N; Santos-Sanz, P; Thirouin, A; Silva, J S

    2015-01-01

    Context: Accurate measurements of diameters of trans-Neptunian objects are extremely complicated to obtain. Thermal modeling can provide good results, but accurate absolute magnitudes are needed to constrain the thermal models and derive diameters and geometric albedos. The absolute magnitude, Hv, is defined as the magnitude of the object reduced to unit helio- and geocentric distances and a zero solar phase angle and is determined using phase curves. Phase coefficients can also be obtained from phase curves. These are related to surface properties, yet not many are known. Aims: Our objective is to measure accurate V band absolute magnitudes and phase coefficients for a sample of trans-Neptunian objects, many of which have been observed, and modeled, within the 'TNOs are cool' program, one of Herschel Space Observatory key projects. Methods: We observed 56 objects using the V and R filters. These data, along with those available in the literature, were used to obtain phase curves and measure V band absolute m...

  11. Magnitude estimation with noisy integrators linked by an adaptive reference

    Directory of Open Access Journals (Sweden)

    Kay eThurley

    2016-02-01

    Full Text Available Judgments of physical stimuli show characteristic biases; relatively small stimuli are overestimated whereas relatively large stimuli are underestimated (regression effect. Such biases likely result from a strategy that seeks to minimize errors given noisy estimates about stimuli that itself are drawn from a distribution, i.e., the statistics of the environment. While being conceptually well described, it is unclear how such a strategy could be implemented neurally. The present paper aims towards answering this question. A theoretical approach is introduced that describes magnitude estimation as two successive stages of noisy (neural integration. Both stages are linked by a reference memory that is updated with every new stimulus. The model reproduces the behavioral characteristics of magnitude estimation and makes several experimentally testable predictions. Moreover, the model identifies the regression effect as a means of minimizing estimation errors and explains how this optimality strategy depends on the subject's discrimination abilities and on the stimulus statistics. The latter influence predicts another property of magnitude estimation, the so-called range effect. Beyond being successful in describing decision-making, the present work suggests that noisy integration may also be important in processing magnitudes.

  12. Sediment resuspension in the Lake Taihu, China

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    In order to examine the intensity of surficial sediment resuspension in Lake Taihu, a large shallow lake in eastern China, suspended sediment concentrations (SSCs) were measured on the basis of analysis of water samples collected using an innovative multi-level water sampler. The results show that under calm weather conditions, the SSC is relatively homogenous through the entire water column. However, when strong winds occur, the SSC in the bottom layer is 1-2 orders of magnitude greater than in the surface layer; thus, in this case, the amount of total suspended matter in the water column cannot be estimated using the SSC values of the surface layer alone. Furthermore, the depth of disturbance, or the thickness of the sediment layer that is set in motion by wind-wave induced currents, is of the order of 100 mm.

  13. Bayesian Predictive Distribution for the Magnitude of the Largest Aftershock

    Science.gov (United States)

    Shcherbakov, R.

    2014-12-01

    Aftershock sequences, which follow large earthquakes, last hundreds of days and are characterized by well defined frequency-magnitude and spatio-temporal distributions. The largest aftershocks in a sequence constitute significant hazard and can inflict additional damage to infrastructure. Therefore, the estimation of the magnitude of possible largest aftershocks in a sequence is of high importance. In this work, we propose a statistical model based on Bayesian analysis and extreme value statistics to describe the distribution of magnitudes of the largest aftershocks in a sequence. We derive an analytical expression for a Bayesian predictive distribution function for the magnitude of the largest expected aftershock and compute the corresponding confidence intervals. We assume that the occurrence of aftershocks can be modeled, to a good approximation, by a non-homogeneous Poisson process with a temporal event rate given by the modified Omori law. We also assume that the frequency-magnitude statistics of aftershocks can be approximated by Gutenberg-Richter scaling. We apply our analysis to 19 prominent aftershock sequences, which occurred in the last 30 years, in order to compute the Bayesian predictive distributions and the corresponding confidence intervals. In the analysis, we use the information of the early aftershocks in the sequences (in the first 1, 10, and 30 days after the main shock) to estimate retrospectively the confidence intervals for the magnitude of the expected largest aftershocks. We demonstrate by analysing 19 past sequences that in many cases we are able to constrain the magnitudes of the largest aftershocks. For example, this includes the analysis of the Darfield (Christchurch) aftershock sequence. The proposed analysis can be used for the earthquake hazard assessment and forecasting associated with the occurrence of large aftershocks. The improvement in instrumental data associated with early aftershocks can greatly enhance the analysis and

  14. Book review: Urban China

    OpenAIRE

    Koh, Sin Yee

    2013-01-01

    "Urban China." Xuefei Ren. Polity. March 2013. --- Currently there are more than 125 Chinese cities with a population exceeding one million. The unprecedented urban growth in China presents a crucial development for studies on globalization and urban transformation. This book examines the past trajectories, present conditions, and future prospects of Chinese urbanization, by investigating five key themes – governance, migration, landscape, inequality, and cultural economy. Sin Yee Koh fin...

  15. Energy for China

    Institute of Scientific and Technical Information of China (English)

    Michael J. Economides

    2002-01-01

    @@ Rarely has the world witnessed the breathtaking economic developments currently ongoing in China. Neither the explosive entry in the international scene by the fresh nation of the United States, following World War Ⅰ, nor the reconstruction frenzy of post-World War Ⅱ Europe and Japan can rival the growth of China in the last decade and the even more intense one expected in the future.

  16. Recalibration of the H$_{-0.5}$ magnitudes of spiral galaxies

    CERN Document Server

    Tormen, G

    1994-01-01

    The H magnitude aperture data published by the Aaronson et al. collaboration over a 10-year period is collected into a homogeneous data set of 1731 observations of 665 galaxies. 96\\% of these galaxies have isophotal diameters and axial ratios determined by the Third Reference Catalogue of Bright Galaxies (de Vaucouleurs et al. 1991), the most self-consistent set of optical data currently available. The precepts governing the optical data in the RC3 are systematically different from those of the Second Reference Catalogue (de Vaucouleurs, de Vaucouleurs and Corwin 1976), which were used by Aaronson et al. for their original analyses of galaxy peculiar motions. This in turn leads to systematic differences in growth curves and fiducial H magnitudes, prompting the present recalibration of the near-infrared Tully Fisher relationship. New optically-normalized H magnitude growth curves are defined for galaxies of types S0 to Im, from which new values of fiducial H magnitudes, H\\rm _{-0.5}^g, are measured for the 665...

  17. Analysis and Development Trend of Current Situation of Cultivation Mode of Nursing Talents in China%我国护理人才培养模式现状与发展趋势分析

    Institute of Scientific and Technical Information of China (English)

    王艳华

    2015-01-01

    现今医学模式、健康观念转变,对护理专业的发展提出了新的要求,对护理人才的需求日渐增长。而加强护理人才的培养,培养出一批高素质、高能力的护理人才则显得十分重要。因此加强护理人才培养质量,突出护理专业特色,是护理管理者重点关注问题。本文就分析我国护理人才培养模式现状,并总结其发展趋势,以此满足现今护理发展要求。%The transformation of current medical model, health concept, put forward new requirements for the development of nursing specialty, the growing demand for nursing personnel. And strengthen the training of nursing talents, cultivate nursing talents in a number of high-quality, high ability is very important. Therefore to strengthen the training of nursing talents quality, highlight the characteristics of the nursing profession, nursing managers focus on the problem is. This paper analysis current situation of cultivation mode of nursing talents in China, and summarizes its development trend, to meet the requirements of the development of modern nursing.

  18. Current status in rehabilitation of burn injury in China%中国烧伤康复的发展现状

    Institute of Scientific and Technical Information of China (English)

    贾赤宇; 邹晓防

    2015-01-01

    Along with the advance in national economy,modern concept of burn rehabilitation from major burn injury implies that measures should be taken to help the patients return to society with dignity.This article briefly reviews the development and achievement of burn rehabilitation in our country,as well as the current difficulties in carrying out rehabilitation measures such as outmoded ideology,lack of trained personnel,low rate of popularization,outdated techniques and methodology,and relatively low level in scientific research,etc.The future development of burn rehabilitation in our country needs more social support,popular attention,and muhidisciplinary joint efforts to help burn patients return to society with dignity.In order to fulfill this goal,we still have a long way to go.

  19. 浅谈我国工程造价管理工作现状%Discuss the Current Situation of Project Cost Management in China

    Institute of Scientific and Technical Information of China (English)

    哈俊达

    2014-01-01

    工程造价管理是有效控制和真实反映工程造价、完善建设项目管理、提高投资效益的重要保障。本文从工程造价管理工作的重要意义,目前工作现状、促进其健康发展的途径等方面,谈了自己的有关看法,提出了有益见解。%The project cost management is an important saf-eguard of effective controlling and reflecting the project cost, perfecting the management of construction projects, and impr-oving the investment benefit. In this article, the author talks about his comments from the significance of the project cost management, the current work situation, and the promotion of the healthy development means and so on.

  20. Evidence-based medicine analysis on current clinical research status of negative pressure wound therapy in China%国内负压创面治疗技术临床研究现状的循证分析

    Institute of Scientific and Technical Information of China (English)

    胡恺轩; 章宏伟

    2009-01-01

    目的 采用循证医学的方法,对国内负压创面治疗技术的临床现状进行系统性研究. 方法 系统性检索2008年12月前国内发表的关于负压创面治疗技术的文献,并对结果进行证据分级和质量等级的评估. 结果 检索到符合标准的文献5篇(均为随机对照试验):1篇证据分级为1b,质量等级为"优",余4篇证据分级为2b,质量等级为"差". 结论 对于负压技术相对宽泛的适应证,目前国内缺乏足够的证据证明其疗效.今后需进一步规范该技术的科学研究及临床应用,包括注重选题和立题的创新性、试验设计的完善性和实用性、治疗过程的标准化等问题.提高发表文献的质量,以更好地指导临床工作.%Objective To systematically review the current research status of negative pressure wound therapy in China based on method of evidence-based medicine (EBM). Methods A systematic retrieval was undertaken on literatures related to negative pressure wound therapy in China. Evidence grading of EBM and quality rating system of preventive service task force were used for evaluation of the results. Results We finally retrieved five randomized controlled trials (RCT), of which only one RCT was classified as good quality and high grade of evidence, whereas the other four were classified as poor quality and low grade of evidence. Conclusions With relatively wide indications, there still lack sufficient evidences to witness the clinical efficiency of NPWT in China. in the future, we should further researches on NPWT including emphasizing on novelty of research topics and intactness and usefulness of experimental design and standardize clinical application of such technique including standardization of treatment procedures. In the meantime, high quality research papers are needed to provide certain guidance for clinical therapy.

  1. 我国商务英语专业实训教学现状与问题的实证研究%An Empirical Study on the Current Situation and Problems of Business English Practical Training in China

    Institute of Scientific and Technical Information of China (English)

    王录; 毛婷; 邵宗音

    2013-01-01

    Practical business English training plays a vital role in enhancing students’ professional capabilities at higher vocational education in China. Competence-based education (CBE) and occupation-oriented business English training pattern has been recognized in higher vocational education throughout China, in which practical abilities training is the key to realizing the goal. The current situation of business English training at over 400 higher vocational colleges and institutes is explored based on the questionnaires and interviews, focusing on the training content, training venues, teachers, textbooks, etc. And data were analyzed using Statistical Package for Social Sciences (SPSS17.0) to draw percentages for variables included in the questionnaire. Findings showed that a vast difference exists between the western and eastern, southern and northern areas due to the economic and cultural difference. Relevant suggestions were put forward to improve practical business English training in China.%实训教学在高职教育中具有重要的地位和作用。能力本位和职业发展导向的商务英语专业人才培养模式已经成为我国高职人才培养模式的共识,而专业实训则是达到该培养目标的关键环节。基于对我国大陆400多所高职院校商务英语专业教师进行的关于实训教学的开设情况,如实训基本条件、实训师资、实训教学资料和实训内容等的问卷调研,结合对部分教师的访谈,运用SPSS17.0统计软件对调研数据做了处理。调研结果表明,上述方面存在着较大的区域差别,分析了存在的问题并提出了改进对策,以期为我国商务英语专业的实训教学提供借鉴。

  2. 国内E-learning数据挖掘研究现状与应用综述%Review of the current research and application of E-learning data-mining in China

    Institute of Scientific and Technical Information of China (English)

    刘冰

    2015-01-01

    随着数据挖掘技术在教育领域越来越多的应用,E-learning数据挖掘逐渐成为当前的研究热点。梳理国内近十年来E-learning研究领域的217篇核心期刊文献,从研究现状、数据挖掘方法、数据挖掘任务等方面对我国E-learning数据挖掘研究领域进行分析,结果表明:国内的研究才刚起步,有许多工作需要研究者来完成,如建设系统数据可以实现无障碍迁移和共享的E-learning平台;加强E-learning数据挖掘领域实证研究的深度和广度;开发简单易用的E-learning数据挖掘专用工具等。%With the increasing application of the technology of data-mining in educational field, E-learning has gradually become a hot topic in current research. This paper studied the 217 key papers in the field of E-learning in the past 10 years in China, carried out a detailed study of China's E-learning data-mining in terms of research situation, research methods, and data-mining task. The result showed the research in China had just begun and needed more efforts. The problems to be dealt with are as followed:constructing of systematic data for barrier-free transfer and shared E-learning platform; strengthening of empirical study of E-learning data-mining in depth and width; and developing of particular tools which are easy to use for E-learning data-mining.

  3. 试论我国当前的反腐败形势∗%On China's current situation of anti-corruption

    Institute of Scientific and Technical Information of China (English)

    雷西发; 郭永丽; 张芳

    2014-01-01

    腐败及其行为源远流长,是一个尚未找到预防药的世界性顽疾。能否理性地、正确地判断反腐败斗争形势,是我们打赢反腐败这场持久战的关键,也是提升全国人民反腐必胜信念的重要条件。我们要用马克思主义的辩证唯物主义和历史唯物主义的基本原理和方法论,科学的分析和评价我国当前的反腐败形势,既要看到反腐败取得的巨大成绩,又要承认当前反腐败面临巨大的难度,同时更要增强全国人民反腐败斗争必胜的信心。%a long history of corruption and its behavior,is a not yet found world ills of preventive medicine.Can ra-tionally,correctly determine the anti-corruption struggle situation,is our key to win the long war of anti-corruption,but also enhance the important conditions for the National People's anti-corruption of triumphalism.We're on the basic princi-ples and methods of dialectical materialism and historical materialism with the Marx doctrine,scientific analysis and eval-uation of our current anti-corruption situation,not only to see the tremendous achievements made anti-corruption,but al-so acknowledged that the current anti-corruption face great difficulty,to boost the people's confidence in the victory more anti-corruption struggle at the same time.

  4. 国内护理人员手卫生感染的现状及处理对策%Current status of hand hygiene among nursing staff in China and treatment countermeasures

    Institute of Scientific and Technical Information of China (English)

    周广红; 刘思玮; 张晓辉; 王秀霞; 栾静

    2016-01-01

    OBJECTIVE The research is designed to define the current status of hand hygiene among nursing staff in China ,the nursing staff is the population who contacts with the patients the most frequently ,the hospital is a gathered place of patients ,there are great variety of diseases ,with the staff mobility great .The bacterial contami‐nation of hands is serious among the nursing staff ,leading to the high risk of spread of pathogens .The causes were analyzed from different perspectives ,the causes of the bacterial contamination of hands of the nursing staff are defined from the aspects of awareness of hand hygiene ,rules and regulations ,and environmental facilities .The training and advocacy of hand hygiene knowledge are intensified ,the supervision of hospitals and environment is strengthened so as to better improve the hand hygiene of nursing staff in China .%目的:阐述国内护理人员手卫生的现状,护理人员与患者接触是最多的,医院是患者的集中场所,疾病种类繁多,人员流动性大,护理人员手部细菌污染程度高,造成病原菌传播的风险大。本文从不同方面进行原因的剖析,从护理人员手卫生认知程度、规章制度、环境设施等方面综述国内护理人员手部细菌污染的原因,并提出加大手卫生知识的培训与宣传、加强并改善医院的监督和环境等处理对策,为更好的改善国内护理人员手卫生现状提供参考。

  5. The current situation analysis and strategy research of iron ore overseas investment by China%我国铁矿石海外投资现状分析及策略研究

    Institute of Scientific and Technical Information of China (English)

    段红梅

    2013-01-01

    10年来,我国海外铁矿投资活动不断增多,在澳大利亚、西非等地开展了大规模的勘探、投资工作,海外铁矿投资初见成效。但同时也存在很多问题,例如我国权益矿份额偏低、投资区域过于集中、投资成本过高、民营企业参与度不够、企业管理混乱等问题。针对这些问题,本文提出了完善境外矿业投资管理机制体制、将西非地区列为重要投资区域、鼓励民营企业大胆“走出去”、缩短企业投资回报时间等对策建议。%In recent 10 years ,as China's overseas investment on iron ore is continually expanding ,many companies have started full-scale exploration and investment programs in Australia ,West Africa and other areas ,and have made a active effect .However ,numerous problems emerged during the progress of these programs ,such as the low share of mineral rights ,the over-concentrated investment location ,the prohibitive investment cost ,the lack of engagement for private enterprises ,and the disarray in business management . This article analyzes the current situation of China's overseas investment programs on iron ore ,proposes corresponding countermeasures ,and comes up with a better set of the mining investment's system and mechanism .For example ,it would be helpful to focus investment on West Africa ,to shorten the period of return on investment ,to encourage more private enterprises to invest overseas ,and to improve preparatory work for new programs .

  6. Comparison and Enlightenment of the Current Situation of Father Involvement in Child Rearing in China and the United States%中美父亲参与幼儿教养的现状比较及启示

    Institute of Scientific and Technical Information of China (English)

    刘晓红

    2016-01-01

    A large number of studies have proved that father's participation is important to the healthy growth of children. However, the relevant survey shows that the phenomenon of"father absence"is widespread in our country at present, which is not conducive to the development of young children, and will have a negative impact on the quality of human resources and national competitiveness as well. Based on the introduction of the current situation of father involvement in child rearing in China and the US, the comparison shows that the amount of time and participation patterns of Chinese fathers are obviously insufficient. And drawing lessons from the experience of the US, this study summs up that China should starts from the legislation, policy, educa⁃tion institutions, communities and families, etc., to promote fathers’participation in early childhood education.%大量研究证明,父亲参与对幼儿健康成长具有重要价值。然而,相关调查显示,目前我国“父亲缺失”的现象普遍存在。这既不利于幼儿发展,也将对我国未来人力资源质量和国家竞争力产生不利影响。比较分析中美父亲参与幼儿教养的现状发现,我国父亲在参与时间量和参与方式上都存在明显不足。美国经验启示我国应从立法、政策、教育机构、社区和家庭等方面入手,促进父亲参与幼儿教养。

  7. Reviews on Current Situation of and Pharmacoeconomic Researches on Multiple Myeloma Treatment in China%我国多发性骨髓瘤治疗现状及药物经济学研究综述

    Institute of Scientific and Technical Information of China (English)

    朱水清; 张琛; 马朱林; 胡晓寒; 宣建伟; 高悦

    2015-01-01

    目的:系统地综述中国多发性骨髓瘤(MM)的治疗现状及药物经济学研究。方法:通过检索国内数据库,对现有已公开发表的相关文献和出版物,从治疗现状和药物经济学研究方面进行汇总、梳理、分析。结果与结论:现有已公开发表的文献均显示随着MM治疗指南的发展和新药的上市,我国MM治疗也有了很大进展。但由于目前诊断及预后评估体系缺乏广泛应用,MM流行病学、疾病负担、新药以及自体移植应用之后生存获益的具体数据和相应的药物经济学研究数据缺乏,中国MM治疗仍面临较大挑战。%Objective: To systematically review on the current situation of and pharmacoeconomic researches on multiple myeloma (MM) treatment in China. Methods: Based on literatures and publications, this study employed a descriptive research to summarize and analyze the related data. Result and Conclusion: With updated NCCN clinical practice guidelines and new medicines coming into markets, a great progress has been made in the treatment of MM in China. But it is still facing signifi cant challenges because of lacking widely used diagnosis and prognosis evaluation system, epidemiological data, disease burden analysis, survival benefit and corresponding cost effectiveness evaluation on new drugs and autologous stem cell transplantation, and high-quality and comprehensive pharmacoeconomic researches.

  8. The Predicament and Route Exploration of Medical Reform in Current China%当前我国医疗改革的困境分析及路径探索

    Institute of Scientific and Technical Information of China (English)

    张红

    2015-01-01

    医改是一项重大惠民工程,与13亿人民群众的生命健康休戚相关。面对医改这一世界性难题,我国始终坚定不移地深入推进医疗改革,旨在促进社会公正、增进人民福祉。在2015年3月召开的两会上,李克强总理提出,推动医改向纵深发展,为医改在攻坚时期的进一步深入指明了前进的方向。通过透视我国当前医疗改革所处的时代背景,揭示其面临的困境,并提出一些崭新的思路以期为我国医疗改革的发展提供建议。%Health care reform is a major benefiting project, which is closely related to the national welfare and the 1.3 billion people's livelihood.In the face of reform, which is a worldwide difficult problem, China has always been unswervingly further promote health care reform, so as to promote social justice and improve people's well-being.In 2015 March meeting of the NPC and CPPCC, prime minister Li Keqiang proposed to promote the reform to develop in depth,which pointed out the advancing direction for the further reform in the crucial period.This pa-per, through the perspective of China's current health care reform in the background, reveals the dilemma and puts forward some new ideas to improve our health care system.

  9. Suitability of rapid energy magnitude determinations for emergency response purposes

    Science.gov (United States)

    Di Giacomo, Domenico; Parolai, Stefano; Bormann, Peter; Grosser, Helmut; Saul, Joachim; Wang, Rongjiang; Zschau, Jochen

    2010-01-01

    It is common practice in the seismological community to use, especially for large earthquakes, the moment magnitude Mw as a unique magnitude parameter to evaluate the earthquake's damage potential. However, as a static measure of earthquake size, Mw does not provide direct information about the released seismic wave energy and its high frequency content, which is the more interesting information both for engineering purposes and for a rapid assessment of the earthquake's shaking potential. Therefore, we recommend to provide to disaster management organizations besides Mw also sufficiently accurate energy magnitude determinations as soon as possible after large earthquakes. We developed and extensively tested a rapid method for calculating the energy magnitude Me within about 10-15 min after an earthquake's occurrence. The method is based on pre-calculated spectral amplitude decay functions obtained from numerical simulations of Green's functions. After empirical validation, the procedure has been applied offline to a large data set of 767 shallow earthquakes that have been grouped according to their type of mechanism (strike-slip, normal faulting, thrust faulting, etc.). The suitability of the proposed approach is discussed by comparing our rapid Me estimates with Mw published by GCMT as well as with Mw and Me reported by the USGS. Mw is on average slightly larger than our Me for all types of mechanisms. No clear dependence on source mechanism is observed for our Me estimates. In contrast, Me from the USGS is generally larger than Mw for strike-slip earthquakes and generally smaller for the other source types. For ~67 per cent of the event data set our Me differs events. A reason of that may be the overcorrection of the energy flux applied by the USGS for this type of earthquakes. We follow the original definition of magnitude scales, which does not apply a priori mechanism corrections to measured amplitudes, also since reliable fault-plane solutions are hardly

  10. A statistical study of magnetic field magnitude changes during substorms in the near earth tail

    Science.gov (United States)

    Lopez, R. E.; Lui, A. T. Y.; Mcentire, R. W.; Potemra, T. A.; Krimigis, S. M.

    1990-01-01

    Using AMPTE/CCE data taken in 1985 and 1986 when the CCE apogee (8.8 earth radii) was within 4.5 hours of midnight, 167 injection events in the near-earth magnetotail have been cataloged. These events are exactly or nearly dispersionless on a 72-sec time scale from 25 keV to 285 keV. The changes in the field magnitude are found to be consistent with the expected effects of the diversion/disruption of the cross-tail current during a substorm, and the latitudinal position of the current sheet is highly variable within the orbit of CCE. The local time variation of the magnetic-field changes implies that the substorm current wedge is composed of longitudinally broad Birkeland currents.

  11. On the Frequency-magnitude Law for Fractal Seismicity

    CERN Document Server

    Molchan, G

    2004-01-01

    Scaling analysis of seismicity in the space-time-magnitude domain very often starts from the relation N(m,L)=a(L)*10**(-bm)*L**c for the rate of seismic events of magnitude M>m in an area of size L. There are some evidences in favor of multifractal property of seismic process. In this case the choice of the scale exponent 'c' is not unique. It is shown how different 'c''s are related to different types of spatial averaging applied to lambda(m, L) and what are the 'c''s for which the distributions of a(L) best agree for small L. Theoretical analysis is supplemented with an analysis of California data for which the above issues were recently discussed on an empirical level.

  12. Robust Computation of Error Vector Magnitude for Wireless Standards

    DEFF Research Database (Denmark)

    Jensen, Tobias Lindstrøm; Larsen, Torben

    2013-01-01

    far a test signal is from a reference signal at the symbol values when some parameters in a reconstruction model are optimized for best agreement. This paper provides an approach to computation of error vector magnitude as described in several standards from measured or simulated data. It is shown...... that the error vector magnitude optimization problem is generally non-convex. Robust estimation of the initial conditions for the optimizer is suggested, which is particularly important for a non-convex problem. A Bender decomposition approach is used to separate convex and non-convex parts of the problem...... to make the optimization procedure simpler and robust. A two step global optimization method is suggested where the global step is the grid method and the local method is the Newton method. A number of test cases are shown to illustrate the concepts....

  13. EARTHQUAKE-INDUCED DEFORMATION STRUCTURES AND RELATED TO EARTHQUAKE MAGNITUDES

    Directory of Open Access Journals (Sweden)

    Savaş TOPAL

    2003-02-01

    Full Text Available Earthquake-induced deformation structures which are called seismites may helpful to clasify the paleoseismic history of a location and to estimate the magnitudes of the potention earthquakes in the future. In this paper, seismites were investigated according to the types formed in deep and shallow lake sediments. Seismites are observed forms of sand dikes, introduced and fractured gravels and pillow structures in shallow lakes and pseudonodules, mushroom-like silts protruding laminites, mixed layers, disturbed varved lamination and loop bedding in deep lake sediments. Earthquake-induced deformation structures, by benefiting from previous studies, were ordered according to their formations and earthquake magnitudes. In this order, the lowest eartquake's record is loop bedding and the highest one is introduced and fractured gravels in lacustrine deposits.

  14. Validity of electrical stimulus magnitude matching in chronic pain

    DEFF Research Database (Denmark)

    Persson, Ann L; Westermark, Sofia; Merrick, Daniel;

    2009-01-01

    OBJECTIVE: To examine the validity of the PainMatcher in chronic pain. DESIGN: Comparison of parallel pain estimates from visual analogue scales with electrical stimulus magnitude matching. PATIENTS: Thirty-one patients with chronic musculoskeletal pain. METHODS: Twice a day ongoing pain was rated...... range of the instrument, the PainMatcher readings utilized only a small part of the instrument range and, importantly, had little or no relation to the visual analogue scale estimates. The validity of the PainMatcher procedure is doubtful....... on a standard 100-mm visual analogue scale, and thereafter magnitude matching was performed using a PainMatcher. The sensory threshold to electrical stimulation was tested twice on separate occasions. RESULTS: In 438 observations visual analogue scale ranged from 3 to 95 (median 41) mm, and Pain...

  15. I Am Broadcasting From China

    Institute of Scientific and Technical Information of China (English)

    YUAN YUAN

    2010-01-01

    @@ Since January 25,every morning from7 to 8 a.m.,listeners to China Radio International(CRI),one of China's national radio stations,have been able to hear a new voice hosting a news program called The Beijing Hour,a program with lively news and current affairs in China as well as around the world.The host was the focus of great attention even before she showed up for the program because of her career background.

  16. China's Role in Purchasing Chain

    Institute of Scientific and Technical Information of China (English)

    Eva; Alice

    2007-01-01

    @@ In current world market,"Made-in-China"often means good price and competitive quality.In terms of China's trade pattern,more than half of Chinese exporting products belong to processing trade industry according to the demands and requirements of international orders.On the purchasing chain,China is learning from its international partners.Safety and quality always tops all issues.

  17. An Empirical Procedure for Rapid Magnitude Estimation in Italy

    OpenAIRE

    Olivieri, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia; Schweitzer, J.; NORSAR, Kjeller, Norway

    2007-01-01

    Abstract Rapid estimates of source parameters are needed for reasons of civil protection in regions where destructive events often occur. This information can prevent further damage and casualties. A relation between the first seconds of a P- wave onset and the local magnitude ML of the earthquake has been developed for the Italy region following results obtained in Japan and Southern California. The proposed dominant period estimate has been used in the present work and i...

  18. Understanding the timing and magnitude of advertising spending patterns.

    OpenAIRE

    Gijsenberg, Maarten; van Heerde, Harald J.; Dekimpe, Marnik; Steenkamp, Jan-Benedict E. M.; Vincent R. Nijs

    2009-01-01

    Notwithstanding the fact that advertising is one of the most used marketing tools, little is known about what is driving (i) the timing and (ii) the magnitude of advertising actions. Building on normative theory, the authors develop a parsimonious model that captures this dual investment process. They explain advertising spending patterns as observed in the market, and investigate the impact of company, competitive, and category-related factors on these decisions, thereby introducing the n...

  19. Spatial patterns of landslide dimension: A tool for magnitude mapping

    Science.gov (United States)

    Catani, Filippo; Tofani, Veronica; Lagomarsino, Daniela

    2016-11-01

    The magnitude of mass movements, which may be expressed by their dimension in terms of area or volume, is an important component of intensity together with velocity. In the case of slow-moving deep-seated landslides, the expected magnitude is the prevalent parameter for defining intensity when assessed as a spatially distributed variable in a given area. In particular, the frequency-volume statistics of past landslides may be used to understand and predict the magnitude of new landslides and reactivations. In this paper we study the spatial properties of volume frequency distributions in the Arno river basin (Central Italy, about 9100 km2). The overall landslide inventory taken into account (around 27,500 events) shows a power-law scaling of volumes for values greater than a cutoff value of about 2 × 104 m3. We explore the variability of the power-law exponent in the geographic space by setting up local subsets of the inventory based on neighbourhoods with radii between 5 and 50 km. We found that the power-law exponent α varies according to geographic position and that the exponent itself can be treated as a random space variable with autocorrelation properties both at local and regional scale. We use this finding to devise a simple method to map the magnitude frequency distribution in space and to create maps of exceeding probability of landslide volume for risk analysis. We also study the causes of spatial variation of α by analysing the dependence of power-law properties on geological and geomorphological factors, and we find that structural settings and valley density exert a strong influence on mass movement dimensions.

  20. SomeThoughtandDiscussionontheIndustrialLand ClassificationinCurrentChina%对当前工业用地分类的思考与探讨

    Institute of Scientific and Technical Information of China (English)

    段德罡; 代冠军; 刘文雪

    2013-01-01

    Urban land classification has its spatial properties, which are both the main task of urban planning and a kind of abstract act of urban planning. Through evaluating and thinking on“the old code”and “the present code”, the author considers that the current industrial land classiifcation is unfavorable for the layout and management of industrial land. The industrial land should be classiifed by pollution types and pollution levels, so as to solve the problems, which are not good for the urban planning and management.%  城市用地分类是具有空间属性的,是城市规划编制的首要任务,也是一种抽象的规划行为。笔者通过对旧国标和新国标中工业用地分类的评析和思考,认为当前工业用地分类不利于工业用地的规划布局和管理,应依据工业用地产生的污染干扰程度和污染类型划分工业用地,以解决工业用地分类不利于规划和管理的问题。