Computer network technology has a very important role in electronic information engineering.The application of this technology not only enriches the traditional information engineering functions,but also effectively g...Computer network technology has a very important role in electronic information engineering.The application of this technology not only enriches the traditional information engineering functions,but also effectively guarantees the efficiency and quality.At present,due to the wide variety of external information that Chinese citizens are exposed to,in addition to the variegated and mixed content,it is easy for information to be leaked or stolen.In order to avoid similar situations,it is necessary for people to pay more attention to network system security,so as to ensure that the quality of life of citizens can be guaranteed.In view of that,this paper discusses and analyzes the application of computer network technology in electronic information engineering.展开更多
Information-centric networking(ICN) aims to improve the efficiency of content delivery and reduce the redundancy of data transmission by caching contents in network nodes. An important issue is to design caching metho...Information-centric networking(ICN) aims to improve the efficiency of content delivery and reduce the redundancy of data transmission by caching contents in network nodes. An important issue is to design caching methods with better cache hit rate and achieve allocating on-demand. Therefore, an in-network caching scheduling scheme for ICN was designed, distinguishing different kinds of contents and dynamically allocating the cache size on-demand. First discussing what was appropriated to be cached in nodes, and then a classification about the contents could be cached was proposed. Furthermore, we used AHP to weight different contents classes through analyzing users' behavior. And a distributed control process was built, to achieve differentiated caching resource allocation and management. The designed scheme not only avoids the waste of caching resource, but also further enhances the cache availability. Finally, the simulation results are illustrated to show that our method has the superior performance in the aspects of server hit rate and convergence.展开更多
European Community policy concerning water is placing increasing demands on the acquisition of information about the quality of aquatic environments. The cost of this information has led to a reflection on the rationa...European Community policy concerning water is placing increasing demands on the acquisition of information about the quality of aquatic environments. The cost of this information has led to a reflection on the rationalization of monitoring networks and, therefore, on the economic value of information produced by these networks. The aim of this article is to contribute to this reflection. To do so, we used the Bayesian framework to define the value of additional information in relation to the following three parameters: initial assumptions (prior probabilities) on the states of nature, costs linked to a poor decision (error costs) and accuracy of additional information. We then analyzed the impact of these parameters on this value, particularly the combined role of prior probabilities and error costs that increased or decreased the value of information depending on the initial uncertainty level. We then illustrated the results using a case study of a stream in the Bas-Rhin department in France.展开更多
为解决水资源信息化建设不足的问题,本文以某丰收灌区为例,对信息技术在水资源管理中的应用进行研究,首先分别介绍大数据、物联网、地理信息系统(Geographic Information System,GIS)与遥感技术的应用原理,并结合实际案例,重点探究水利...为解决水资源信息化建设不足的问题,本文以某丰收灌区为例,对信息技术在水资源管理中的应用进行研究,首先分别介绍大数据、物联网、地理信息系统(Geographic Information System,GIS)与遥感技术的应用原理,并结合实际案例,重点探究水利信息化系统的设计与应用,通过构建完善的数据库,充分发挥GIS与遥感技术优势,可使区域湿地、新开耕地得到实时监测、灌排水渠规划更加合理、电子地图修改与更新需求得到满足,全面提高水资源管理工作质量,以期为相关人员提供参考。展开更多
文摘Computer network technology has a very important role in electronic information engineering.The application of this technology not only enriches the traditional information engineering functions,but also effectively guarantees the efficiency and quality.At present,due to the wide variety of external information that Chinese citizens are exposed to,in addition to the variegated and mixed content,it is easy for information to be leaked or stolen.In order to avoid similar situations,it is necessary for people to pay more attention to network system security,so as to ensure that the quality of life of citizens can be guaranteed.In view of that,this paper discusses and analyzes the application of computer network technology in electronic information engineering.
基金supported in part by The National High Technology Research and Development Program of China (863 Program) under Grant No. 2015AA016101The National Natural Science Foundation of China under Grant No. 61501042+1 种基金Beijing Nova Program under Grant No. Z151100000315078BUPT Special Program for Youth Scientific Research Innovation under Grant No. 2015RC10
文摘Information-centric networking(ICN) aims to improve the efficiency of content delivery and reduce the redundancy of data transmission by caching contents in network nodes. An important issue is to design caching methods with better cache hit rate and achieve allocating on-demand. Therefore, an in-network caching scheduling scheme for ICN was designed, distinguishing different kinds of contents and dynamically allocating the cache size on-demand. First discussing what was appropriated to be cached in nodes, and then a classification about the contents could be cached was proposed. Furthermore, we used AHP to weight different contents classes through analyzing users' behavior. And a distributed control process was built, to achieve differentiated caching resource allocation and management. The designed scheme not only avoids the waste of caching resource, but also further enhances the cache availability. Finally, the simulation results are illustrated to show that our method has the superior performance in the aspects of server hit rate and convergence.
文摘European Community policy concerning water is placing increasing demands on the acquisition of information about the quality of aquatic environments. The cost of this information has led to a reflection on the rationalization of monitoring networks and, therefore, on the economic value of information produced by these networks. The aim of this article is to contribute to this reflection. To do so, we used the Bayesian framework to define the value of additional information in relation to the following three parameters: initial assumptions (prior probabilities) on the states of nature, costs linked to a poor decision (error costs) and accuracy of additional information. We then analyzed the impact of these parameters on this value, particularly the combined role of prior probabilities and error costs that increased or decreased the value of information depending on the initial uncertainty level. We then illustrated the results using a case study of a stream in the Bas-Rhin department in France.
基金Project Supported： Beijing National Social Science Foundation （Project number： 13ZHB013）, the Chinese National Social Science Foundation （Project number： 12＆ZD220 ＆ 13 ＆ZD 184）, and the Chinese National Natural Science Foundation （Project number： 71133006/G0314）.
文摘为解决水资源信息化建设不足的问题,本文以某丰收灌区为例,对信息技术在水资源管理中的应用进行研究,首先分别介绍大数据、物联网、地理信息系统(Geographic Information System,GIS)与遥感技术的应用原理,并结合实际案例,重点探究水利信息化系统的设计与应用,通过构建完善的数据库,充分发挥GIS与遥感技术优势,可使区域湿地、新开耕地得到实时监测、灌排水渠规划更加合理、电子地图修改与更新需求得到满足,全面提高水资源管理工作质量,以期为相关人员提供参考。
