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Study on Dynamic Information of Animal Genetic Resources in China 被引量:4
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作者 MAYue-hui XUGui-fang +2 位作者 WANGDuan-yun LIUHai-liang YANGYan 《Agricultural Sciences in China》 CAS CSCD 2003年第1期80-84,共5页
The dynamic information of 331 animal genetic resources in 17 important animal genetic resource provinces (regions) was analyzed. According to the population inbreeding coefficient, combining with the information of p... The dynamic information of 331 animal genetic resources in 17 important animal genetic resource provinces (regions) was analyzed. According to the population inbreeding coefficient, combining with the information of population dynamic change trend and cross degree, these genetic resources for threatened degrees were classified. The results indicated that the population size of 138 breeds had increased, 147 breeds had decreased, 3 breeds were constant, 7 breeds (or varieties) were extinct, 9 breeds (or varieties) were critically endangered and needed urgently conserve, 50 breeds (or varieties) were endangered and should be conserved. We put forward a conservation and utilization plan for animal genetic resources. 展开更多
关键词 Animal genetic resources dynamic information CONSERVATION
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Cooperative maneuver decision making for multi-UAV air combat based on incomplete information dynamic game 被引量:4
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作者 Zhi Ren Dong Zhang +2 位作者 Shuo Tang Wei Xiong Shu-heng Yang 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2023年第9期308-317,共10页
Cooperative autonomous air combat of multiple unmanned aerial vehicles(UAVs)is one of the main combat modes in future air warfare,which becomes even more complicated with highly changeable situation and uncertain info... Cooperative autonomous air combat of multiple unmanned aerial vehicles(UAVs)is one of the main combat modes in future air warfare,which becomes even more complicated with highly changeable situation and uncertain information of the opponents.As such,this paper presents a cooperative decision-making method based on incomplete information dynamic game to generate maneuver strategies for multiple UAVs in air combat.Firstly,a cooperative situation assessment model is presented to measure the overall combat situation.Secondly,an incomplete information dynamic game model is proposed to model the dynamic process of air combat,and a dynamic Bayesian network is designed to infer the tactical intention of the opponent.Then a reinforcement learning framework based on multiagent deep deterministic policy gradient is established to obtain the perfect Bayes-Nash equilibrium solution of the air combat game model.Finally,a series of simulations are conducted to verify the effectiveness of the proposed method,and the simulation results show effective synergies and cooperative tactics. 展开更多
关键词 Cooperative maneuver decision Air combat Incomplete information dynamic game Perfect bayes-nash equilibrium Reinforcement learning
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Foundations and Applications of Information Systems Dynamics
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作者 Jianfeng Xu Zhenyu Liu +4 位作者 Shuliang Wang Tao Zheng Yashi Wang Yingfei Wang Yingxu Dang 《Engineering》 SCIE EI CAS CSCD 2023年第8期254-265,共12页
Although numerous advances have been made in information technology in the past decades,there is still a lack of progress in information systems dynamics(ISD),owing to the lack of a mathematical foundation needed to d... Although numerous advances have been made in information technology in the past decades,there is still a lack of progress in information systems dynamics(ISD),owing to the lack of a mathematical foundation needed to describe information and the lack of an analytical framework to evaluate information systems.The value of ISD lies in its ability to guide the design,development,application,and evaluation of largescale information system-of-systems(So Ss),just as mechanical dynamics theories guide mechanical systems engineering.This paper reports on a breakthrough in these fundamental challenges by proposing a framework for information space,improving a mathematical theory for information measurement,and proposing a dynamic configuration model for information systems.In this way,it establishes a basic theoretical framework for ISD.The proposed theoretical methodologies have been successfully applied and verified in the Smart Court So Ss Engineering Project of China and have achieved significant improvements in the quality and efficiency of Chinese court informatization.The proposed ISD provides an innovative paradigm for the analysis,design,development,and evaluation of large-scale complex information systems,such as electronic government and smart cities. 展开更多
关键词 System-of-systems engineering information theory information measurement information systems dynamics Judicial informatization
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Comparison Research on Anti-dumping Duty Rates between Administrative Review and Welfare Maximization under Dynamic Game of Perfect Information
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作者 许源 朱海洋 钟根元 《Journal of Donghua University(English Edition)》 EI CAS 2006年第3期127-130,共4页
Using economics and game theory, two kinds of models have been proposed in this paper under the assumption that foreign and domestic firms behave under the condition of dynamic game of perfect information. One model i... Using economics and game theory, two kinds of models have been proposed in this paper under the assumption that foreign and domestic firms behave under the condition of dynamic game of perfect information. One model is for calculating Anti-dumping rate which is obtained according to current regulations of Anti-dumping, but it is not optimal. The other is an optimal model of Anti-dumping which is obtained according to the maximum principle of domestic social welfare. Then, through the comparison of this two models in detail, several shortages have been revealed about Anti-dumping rate model based on current regulations of Anti-dumping. Finally, a suggestion is indicated that WTO and China should use the optimal model to calculate Anti-dumping rate. 展开更多
关键词 administrative review Anti-dumping rate dynamic game perfect information.
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EV Charging Station Load Prediction in Coupled Urban Transportation and Distribution Networks
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作者 Benxin Li Xuanming Chang 《Energy Engineering》 EI 2024年第10期3001-3018,共18页
The increasingly large number of electric vehicles(EVs)has resulted in a growing concern for EV charging station load prediction for the purpose of comprehensively evaluating the influence of the charging load on dist... The increasingly large number of electric vehicles(EVs)has resulted in a growing concern for EV charging station load prediction for the purpose of comprehensively evaluating the influence of the charging load on distribution networks.To address this issue,an EV charging station load predictionmethod is proposed in coupled urban transportation and distribution networks.Firstly,a finer dynamic urban transportation network model is formulated considering both nodal and path resistance.Then,a finer EV power consumption model is proposed by considering the influence of traffic congestion and ambient temperature.Thirdly,the Monte Carlo method is applied to predict the distribution of EVcharging station load based on the proposed dynamic urban transportation network model and finer EV power consumption model.Moreover,a dynamic charging pricing scheme for EVs is devised based on the EV charging station load requirements and the maximum thresholds to ensure the security operation of distribution networks.Finally,the validity of the proposed dynamic urban transportation model was verified by accurately estimating five sets of test data on travel time by contrast with the BPR model.The five groups of travel time prediction results showed that the average absolute percentage errors could be improved from 32.87%to 37.21%compared to the BPR model.Additionally,the effectiveness of the proposed EV charging station load prediction method was demonstrated by four case studies in which the prediction of EV charging load was improved from27.2 to 31.49MWh by considering the influence of ambient temperature and speed on power energy consumption. 展开更多
关键词 Electric vehicle dynamic traffic information charging stations charging load forecasting dynamic electricity pricing
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EVOLUTION OF DYNAMIC GAMES AND BACKWARD INDUCTION 被引量:1
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作者 史剑新 韩文秀 《Transactions of Tianjin University》 EI CAS 2001年第1期61-63,共3页
As an efficient method of solving subgame-perfect Nash equilibrium,the backward induction is analyzed from an evolutionary point of view in this paper,replacing a player with a population and turning a game into a pop... As an efficient method of solving subgame-perfect Nash equilibrium,the backward induction is analyzed from an evolutionary point of view in this paper,replacing a player with a population and turning a game into a population game,which shows that equilibrium of a perfect information game is the unique evolutionarily stable outcome for dynamic models in the limit. 展开更多
关键词 backward induction dynamic games of perfect information subgame-perfect Nash equilibrium EVOLUTION
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Grey Relation between Nonlinear Characteristic and Dynamic Uncertainty of Rolling Bearing Friction Torque 被引量:13
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作者 XIA Xintao WANG Zhongyu 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2009年第2期244-249,共6页
The rolling bearing friction torque which is characterized by its uncertainty and nonlinearity affects heavily the dynamic performance of a system such as missiles, spacecrafts and radars, etc. It is difficult to use ... The rolling bearing friction torque which is characterized by its uncertainty and nonlinearity affects heavily the dynamic performance of a system such as missiles, spacecrafts and radars, etc. It is difficult to use the classical statistical theory to evaluate the dynamic evaluation of the rolling bearing friction torque for the lack of prior information about both probability distribution and trends. For this reason, based on the information poor system theory and combined with the correlation dimension in chaos theory, the concepts about the mean of the dynamic fluctuant range (MDFR) and the grey relation are proposed to resolve the problem about evaluating the nonlinear characteristic and the dynamic uncertainty of the rolling bearing friction torque. Friction torque experiments are done for three types of the rolling bearings marked with HKTA, HKTB and HKTC separately; meantime, the correlation dimension and MDFR are calculated to describe the nonlinear characteristic and the dynamic uncertainty of the friction torque, respectively. And the experiments reveal that there is a certain grey relation between the nonlinear characteristic and the dynamic uncertainty of the rolling bearing friction torque, viz. MDFR will become the nonlinear increasing trend with the correlation dimension increasing. Under the condition of fewer characteristic data and the lack of prior information about both probability distribution and trends, the unitive evaluation for the nonlinear characteristic and the dynamic uncertainty of the rolling bearing friction torque is realized with the grey confidence level of 87.7%-96.3%. 展开更多
关键词 rolling bearing friction torque time series correlation dimension mean of dynamic fluctuant range (MDFR) information poor system theory
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Recent Progress of Marine Geographic Information System in China:A Review for 2006-2010 被引量:7
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作者 CHEN Ge LI Wenqing +3 位作者 KONG Qianqian LIU Shouxin LV Chongjing TIAN Fenglin 《Journal of Ocean University of China》 SCIE CAS 2012年第1期18-24,共7页
In this article,the progress of marine geographic information system(MGIS) in China during 2006?2010 is reviewed with emphases on generic MGIS,advanced MGIS and MGIS-based applications.Generic MGIS can be divided into... In this article,the progress of marine geographic information system(MGIS) in China during 2006?2010 is reviewed with emphases on generic MGIS,advanced MGIS and MGIS-based applications.Generic MGIS can be divided into two categories:data-oriented MGIS and user-oriented MGIS,recent achievements of which by Chinese researchers are summarized respectively.Advanced MGIS mainly involves the establishment of 3D virtual marine environment and 'Digital Ocean'.An overview of the 3D MGIS based simulations in the context of ocean phenomena,ocean engineering and ocean battlefield is also presented.Several sug-gestions for future development of MGIS in China are proposed,and trends of development are addressed. 展开更多
关键词 marine geographic information system virtual marine environment digital ocean dynamic visualization ocean simu-lation
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Study on the Reduced Traffic Congestion Method Based on Dynamic Guidance Information
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作者 Shu-Bin Li Guang-Min Wang +2 位作者 Tao Wang Hua-Ling Ren and Lin Zhang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2018年第5期577-584,共8页
This paper studies how to generate the reasonable information of travelers' decision in real network. This problem is very complex because the travelers' decision is constrained by different human behavior. Th... This paper studies how to generate the reasonable information of travelers' decision in real network. This problem is very complex because the travelers' decision is constrained by different human behavior. The network conditions can be predicted by using the advanced dynamic OD(Origin-Destination, OD) estimation techniques. Based on the improved mesoscopic traffic model, the predictable dynamic traffic guidance information can be obtained accurately.A consistency algorithm is designed to investigate the travelers' decision by simulating the dynamic response to guidance information. The simulation results show that the proposed method can provide the best guidance information. Further,a case study is conducted to verify the theoretical results and to draw managerial insights into the potential of dynamic guidance strategy in improving traffic performance. 展开更多
关键词 dynamic information traffic flow model traffic control guidance information traffic congestion
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Dynamical Change of Quantum Fisher Information of Cavity-Reservoir Systems
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作者 黄江 谢钦 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第4期453-459,共7页
We study the quantum Fisher information(QFI) dynamics of the phase parameter in the enlarged cavityreservoir systems at zero temperature under two situations of large N limit and non-Markovian environment,respectively... We study the quantum Fisher information(QFI) dynamics of the phase parameter in the enlarged cavityreservoir systems at zero temperature under two situations of large N limit and non-Markovian environment,respectively.We find an important relation that the total quantities of QFI of the cavity and reservoir are equal to unit during the dynamical evolution.The lost QFI of the cavity transfers to its corresponding reservoir with the same quantities simultaneously.Moreover,we also find that the detuning parameter and non-Markovian effect are two significant factors to affect the preservation of QFI. 展开更多
关键词 dynamical change quantum Fisher information cavity-reservoir systems
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The dynamics of the risk perception on a social network and its effect on disease dynamics
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作者 Meili Li Yuhan Ling Junling Ma 《Infectious Disease Modelling》 CSCD 2023年第3期632-644,共13页
The perceived infection risk changes individual behaviors,which further affects the disease dynamics.This perception is influenced by social communication,including surveying their social network neighbors about the f... The perceived infection risk changes individual behaviors,which further affects the disease dynamics.This perception is influenced by social communication,including surveying their social network neighbors about the fraction of infected neighbors and averaging their neighbors’perception of the risk.We model the interaction of disease dynamics and risk perception on a two-layer random network that combines a social network layer with a contact network layer.We found that if information spreads much faster than disease,then all individuals converge on the true prevalence of the disease.On the other hand,if the two dynamics have comparable speeds,the risk perception still converges to a value uniformly on the network.However,the perception lags behind the true prevalence and has a lower peak value.We also study the behavior change caused by the perception of infection risk.This behavior change may affect the disease dynamics by reducing the transmission rate along the edges of the contact network or by breaking edges and isolating the infectious individuals.The effects on the basic reproduction number,the peak size,and the final size are studied.We found that these two effects give the same basic reproduction number.We find edge-breaking has a larger effect on reducing the final size,while reducing the transmission rate has a larger effect on reducing the peak size,which is true for both scale-free and Poisson networks. 展开更多
关键词 Risk perception Social network Contact network information dynamics
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A temporal-spatial background modeling of dynamic scenes
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作者 Jiuyue HAO Chao LI +1 位作者 Zhang XIONG Ejaz HUSSAIN 《Frontiers of Materials Science》 SCIE CSCD 2011年第3期290-299,共10页
Moving object detection in dynamic scenes is a basic task in a surveillance system for sensor data collection. In this paper, we present a powerful back- ground subtraction algorithm called Gaussian-kernel density est... Moving object detection in dynamic scenes is a basic task in a surveillance system for sensor data collection. In this paper, we present a powerful back- ground subtraction algorithm called Gaussian-kernel density estimator (G-KDE) that improves the accuracy and reduces the computational load. The main innovation is that we divide the changes of background into continuous and stable changes to deal with dynamic scenes and moving objects that first merge into the background, and separately model background using both KDE model and Gaussian models. To get a temporal- spatial background model, the sample selection is based on the concept of region average at the update stage. In the detection stage, neighborhood information content (NIC) is implemented which suppresses the false detection due to small and un-modeled movements in the scene. The experimental results which are generated on three separate sequences indicate that this method is well suited for precise detection of moving objects in complex scenes and it can be efficiently used in various detection systems. 展开更多
关键词 temporal-spatial background model Gaus-sian-kemel density estimator (G-KDE) dynamic scenes neighborhood information content (NIC) moving objectdetection
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A Novel Risk Informatization Assessment System for In-Service Highway Slope Based on Network
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作者 CHAI Caiping GUAN Limin +2 位作者 WANG Yunfei CUI Wenfen WANG Huifeng 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2020年第3期267-276,共10页
Aiming at the information evaluation of traffic infrastructure in-service roadside slope risk assessment,the method of risk assessment for highway slope engineering is proposed by using the combination of quantitative... Aiming at the information evaluation of traffic infrastructure in-service roadside slope risk assessment,the method of risk assessment for highway slope engineering is proposed by using the combination of quantitative and qualitative methods,and a new risk assessment method is proposed and improved.The system,in order to prevent the risks in slope engineering,serves the scientific decision-making of the maintenance,operation and management of the in-service road slopes.Based on the analysis of the special geological conditions,complex surrounding environment and construction schemes of existing highway slopes in China,this paper establishes an in-service slope evaluation model for in-service roads,and designs the scheme diagram of the in-service road slope evaluation system based on the networked Internet platform.Moreover,a set of in-service roadside slope risk assessment system software,the system component block diagram and the main design interface are given.This system can meet the needs of comprehensive evaluation of multi-factors in service road slopes. 展开更多
关键词 in-service road slope slope disaster slope dynamic information networked software regional geological conditions
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A Knowledge Graph Based Approach to Social Science Surveys 被引量:1
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作者 Jeff Z.Pan Elspeth Edelstein +1 位作者 Patrik Bansky Adam Wyner 《Data Intelligence》 EI 2021年第4期477-506,共30页
Recent success of knowledge graphs has spurred interest in applying them in open science,such as on intelligent survey systems for scientists.However,efforts to understand the quality of candidate survey questions pro... Recent success of knowledge graphs has spurred interest in applying them in open science,such as on intelligent survey systems for scientists.However,efforts to understand the quality of candidate survey questions provided by these methods have been limited.Indeed,existing methods do not consider the type of on-the-fly content planning that is possible for face-to-face surveys and hence do not guarantee that selection of subsequent questions is based on response to previous questions in a survey.To address this limitation,we propose a dynamic and informative solution for an intelligent survey system that is based on knowledge graphs.To illustrate our proposal,we look into social science surveys,focusing on ordering the questions of a questionnaire component by their level of acceptance,along with conditional triggers that further customise participants’experience.Our main findings are:(i)evaluation of the proposed approach shows that the dynamic component can be beneficial in terms of lowering the number of questions asked per variable,thus allowing more informative data to be collected in a survey of equivalent length;and(ii)a primary advantage of the proposed approach is that it enables grouping of participants according to their responses,so that participants are not only served appropriate follow-up questions,but their responses to these questions may be analysed in the context of some initial categorisation.We believe that the proposed approach can easily be applied to other social science surveys based on grouping definitions in their contexts.The knowledge-graph-based intelligent survey approach proposed in our work allows online questionnaires to approach face-to-face interaction in their level of informativity and responsiveness,as well as duplicating certain advantages of interview-based data collection. 展开更多
关键词 Intelligent survey system dynamic and informative system Knowledge graph Linguistic grammaticality judgements
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