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A New Localization Scheme with Statistical Estimation against Wormhole Attack in Wireless Sensor Networks

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China Communications 2010年第5期7卷 57-69页

作者： Niu Yanchao Gao Deyun Chen Ping zhang sidong zhang Hongke National Engineering Laboratory for Next Generation Internet Interconnection Devices Beijing Jiaotong University Beijing 100044 P. R. China TEDA College Nankai University Tianjin 300457 P. R. China

Wormhole attack is one of the most devastating threats for range-free localization in wireless sensor networks. In this paper, we evaluate three statistical estimation methods with the same network model and geographic information obtailaed by the DV-Hop algorithm. We analyze the limits of Minimum Mean Square Estimate （MMSE）, Least Median of Squares （LMS） and Enhanced greedy At- tack-Resistant MMSE （EARMMSE） and propose an improved EARMMSE with the hop-distance relationship, named EARMMSE＋. Simulation results illustrate the performance of MMSE, LMS and EARMMSE＋ with different anchor fraction, the length of wormhole link and the average local neighborhood and show that EARMMSE＋ outperforms MMSE and LMS.

关键词： wireless sensor network range-free localization wormhole attack DV-Hop statistical estimation

Load Balancing-Based Routing Optimization Mechanism for Power Communication Networks

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China Communications 2016年第8期13卷 169-176页

作者： Ningzhe Xing Siya Xu sidong zhang Shaoyong Guo School of Electronic and Information Engineering Beijing Jiaotong University Beijing 100044 China State Grid Jibei Electric Power Company Limited Information & Telecommunication Branch Beijing 1000053 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

In power communication networks, it is a challenge to decrease the risk of different services efficiently to improve operation reliability. One of the important factor in reflecting communication risk is service route distribution. However, existing routing algorithms do not take into account the degree of importance of services, thereby leading to load unbalancing and increasing the risks of services and networks. A routing optimization mechanism based on load balancing for power communication networks is proposed to address the abovementioned problems. First, the mechanism constructs an evaluation model to evaluate the service and network risk degree using combination of devices, service load, and service characteristics. Second, service weights are determined with modified relative entropy TOPSIS method, and a balanced service routing determination algorithm is proposed. Results of simulations on practical network topology show that the mechanism can optimize the network risk degree and load balancing degree efficiently.

关键词： power communication networks load balancing routing optimization

PLC-Oriented Access Point Location Planning Algorithm in Smart-Grid Communication Networks

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China Communications 2016年第9期13卷 91-102页

作者： Ningzhe Xing sidong zhang Yue Shi Shaoyong Guo Beijing Jiaotong University Beijing 100053China Information and Communication Branch Company State Grid Jibei Electric Power Co.ltd100053China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China

In this study, we investigate the optimal location of access points （APs） to connect end nodes with a service provider through power-line communication in smartgrid communication networks. APs are the gateways of power-distribution communication networks, connecting users to control centers. Hence, they are vital for the reliable, safe, and economical operation of a power system. This paper proposes a planning method for AP allocation that takes into consideration economics, reliability, network delay, and （n-l） resilience. First, an optimization model for the AP location is established, which minimizes the cost of installing APs, while satisfying the reliability, network delay, and （n-1） resilience constraints. Then, an improved genetic algorithm is proposed to solve the optimization problem. The simulation results indicate that the proposed planning method can deal with diverse network conditions satisfactorily. Furthermore, it can be applied effectively with high flexibility and scalability.

关键词： smart-grid communication network optimal location access point network delay genetic algorithm

Security Model for Analyzing Data Privacy in Multipath Transport

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China Communications 2012年第5期9卷 32-41页

作者： Song Fei Xue Miao zhang sidong Beijing Jiaotong Univ Sch Elect & Informat Engn Natl Engn Lab Next Generat Internet Interconnect Beijing 100044 Peoples R China

In order to investigate the enhancement of data privacy by distributing data packets via multiple paths, this paper fommlates a security model and analyzes the privacy problem in mul- tipath scenarios leveraging inforrmtion theoretic concept. Based on proposed model, a privacy function related to the path number is discussed. We heuristically recommend the optin^al path num- ber and analyze the tradeoff among the perform- ance, resource consumption and privacy. For re- ducing the inforlmtion leakage, the data schedule algorithms are also proposed. The analytical model can provide guidelines for the multipath protocol design.

关键词： data privacy multipath transport in-formation theory tradeoff

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国内图情类核心期刊基金资助论文的计量分析

情报杂志 2011年第5期30卷 76-80,52页

作者：张思东广东技术师范学院图书馆广州510665

采取文献计量学的方法,对2000年-2009年中国图书情报类核心期刊基金资助论文进行分析,从资助基金的级别与比例、论文在期刊上的分布、高产出作者及其重点研究领域、高产出机构及其重点研究领域、关键词词频分布等方面,描述中国图书情报... 详细信息

采取文献计量学的方法,对2000年-2009年中国图书情报类核心期刊基金资助论文进行分析,从资助基金的级别与比例、论文在期刊上的分布、高产出作者及其重点研究领域、高产出机构及其重点研究领域、关键词词频分布等方面,描述中国图书情报学基金资助研究的基本特点和整体状况。同时,将数据分为2000年-2004年、2005年-2009年两个阶段进行比较分析,揭示中国图书情报学基金资助研究的演变过程和发展趋势。

关键词：图书馆学情报学基金论文核心期刊论文文献计量

Improved Implementation and Evaluation of Wireless Sensor Networks in Intelligent Building

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China Communications 2011年第8期8卷 64-71页

作者：段俊奇张思东郑涛 National Engineering Laboratory for Next Generation Internet Interconnection Devices Beijing Jiaotong University

A complete study for the implementation of wireless sensor networks in the intelligent building is presented. We carry out some experiments to find out the factors affecting the network performance. Several vital parameters which are related to the link quality are measured before deploying the actual system. And then, we propose an optimized routing protocol based on the analysis of the test data. We evaluate the deployment strategies to ensure the excellent performance of the wireless sensor networks under the real working conditions. And the evaluation results show that the presented system could satisfy the requirements of the applications in the intelligent building.

关键词： wireless sensor networks deployment strategy network parameters routing protocol intelligent building

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多路径并行传输的临界条件研究

北京交通大学学报 2013年第2期37卷 49-56页

作者：刘畅宋飞张思东北京交通大学下一代互联网互联设备国家工程实验室北京100044

在使用多路径并行传输时,路径差异引起的数据乱序是不可避免,这会导致多路径的传输性能大幅度下降,甚至低于单路径.本文利用路径延时、带宽和接收缓存大小这3个属性,建立网络传输模型.通过模型分别计算单路径和多路径的传输速度并进行比... 详细信息

在使用多路径并行传输时,路径差异引起的数据乱序是不可避免,这会导致多路径的传输性能大幅度下降,甚至低于单路径.本文利用路径延时、带宽和接收缓存大小这3个属性,建立网络传输模型.通过模型分别计算单路径和多路径的传输速度并进行比较,最终给出多路径优于单路径的临界条件.临界条件的最终结论分为公式形式、推广形式和简化应用方法.最后通过网络测试结果,对上述结论进行了验证.

关键词：多路径并行传输传输吞吐量路径差异数据乱序

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表面限域掺杂提升高比能正极材料稳定性

物理化学学报 2021年第11期37卷 75-87页

作者：张思东刘园祁慕尧曹安民中国科学院化学研究所分子纳米结构与纳米技术院重点实验室北京分子科学国家中心北京100190 中国科学院大学北京100049 郑州大学基础医学院纳米酶医学中心郑州450001

锂离子电池在便携式电子设备、电动汽车等领域得到了广泛应用,随着对电池能量密度需求的日益增加,高比能、高稳定正极材料的开发成为相关研究的重点和难点。而正极材料比能量的提升又同时伴随着其自身结构稳定性和循环稳定性的挑战,使... 详细信息

锂离子电池在便携式电子设备、电动汽车等领域得到了广泛应用,随着对电池能量密度需求的日益增加,高比能、高稳定正极材料的开发成为相关研究的重点和难点。而正极材料比能量的提升又同时伴随着其自身结构稳定性和循环稳定性的挑战,使得锂离子电池的稳定性、安全性成为制约其应用的关键挑战。本文以高比能正极材料为研究对象,对影响正极材料结构稳定性、电化学稳定性等一系列因素进行介绍和分析,再从目前改善材料结构稳定性的有效策略入手,对表面限域掺杂这一特殊稳定策略的实现途径、稳定机制进行了总结和分析,并结合现有不同表面修饰方法进行分析和评述,对高比能正极稳定性提升的可能策略及方向进行了展望。

关键词：锂离子电池高比能正极材料表面限域掺杂均匀包覆稳定性

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多频无线通信网路由协议

北京交通大学学报 2010年第2期34卷 53-57页

作者：王俊芳张思东北京交通大学电子信息工程学院北京100044

针对多频无线通信网的特点,设计了一种多频无线通信网路由协议(MCWN-RP).协议采用组播扩散机制优化扩散路径,采用非重传确认机制减少报文种类,采用最短路径树构造算法降低扩散内容,采用自适应定时器调整机制减少网络冲突,从而大大降低... 详细信息

针对多频无线通信网的特点,设计了一种多频无线通信网路由协议(MCWN-RP).协议采用组播扩散机制优化扩散路径,采用非重传确认机制减少报文种类,采用最短路径树构造算法降低扩散内容,采用自适应定时器调整机制减少网络冲突,从而大大降低了协议开销;同时采用差别拓扑更新方式,提高收敛性能.对MCWN-RP进行了协议开销和收敛时间的性能分析,得出协议性能与拓扑更新包大小和协议包发送间隔的关系.OPNET仿真结果表明,与OSPF、OLSR协议相比,MCWN-RP具有非常小的协议开销和较高的收敛性能,是一种高效的动态路由协议.

关键词：无线通信网路由协议扩散方式开销仿真