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Search Results: 1 - 10 of 68747 matches for " WU Chun-xue "
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Research on QoS Scheduling Strategies for Remote NCS
远程NCS的QoS调度策略研究

WU Chun-xue,GUO Xian-hui,
邬春学
,郭贤辉

计算机科学 , 2009,
Abstract: As Internet only provides best effort service,its random and uncertain delay can not guarantee QoS requirements,such as real-time performance,for remote networked control systems based on Internet,making the stability performance of control systems poor.On the basis of the traditional distributed QoS routing strategies for IP-network,we put forward an QoS scheduling strategy,based on data priority mechanism and instruction speculate technology,for remote NCS.It was illustrated through the NS2 simulation exp...
Implementation of an Ad Hoc Network Protocol E-OAODV Improving the Performance of TCP
一种提高TCP性能的移动自组网E-OAODV协议的实现

WU Chun-xue,YANG Chao-liang,
邬春学
,杨朝梁

计算机科学 , 2009,
Abstract: In order to improve the performance of TCP used in Ad Hoc networks,an enhanced routing protocol based on AODV was presented,which is called E-OAODV(Enhanced Optimal Ad Hoc On-demand Distant Vector)in this paper.By using routing information included in ACK returned from destination nodes,E-OAODV tries to transfer data to destination node while routing failures occurred.And at the same time,with modifications in both TCP and OAODV,E-OAODV tries its best to recover the lost data caused by routing failures.By N...
Double clusters layered structure for Ad hoc network
Ad hoc 网络双簇头分层结构*

WU Chun-xue,WANG Kai-li,
邬春学
,王开立

计算机应用研究 , 2009,
Abstract: By analyzing the existing Ad hoc architecture problems, put forward a two-tiered structure of cluster head. Cluster head from the first generation, routing protocol and data communications to achieve the three main points of detailed information on dual-layered structure of cluster head. Finally, from an average of cluster counts and the two in terms of throughput dual cluster head with a single cluster head layered structure and increase in performance simulation analysis. Thought for the Ad hoc architecture provides a new direction.
Research and Implementation of Multi-path Routing Protocol EMP-AOMDV
多路径路由协议EMP—AOMDV的研究与实现

WU Chun-xue,YANG Chao-liang,
邬春学
,杨朝梁

计算机科学 , 2009,
Abstract: In AODV routing protocol,an intermediate node can reply a RREQ when it has a route with a sequence number that is greater than or equal to that contained in the RREQ,no matter how many packets are waiting to send in it.These routes' performance may degrade because local congestions may incur on those nodes with the increase of offered load.To solve this problem,a multi-path routing methods MP-AOMDV had been optimized on the basis of AODV.This optimized protocol is called EMP-AOMDV (Enhanced Ad hoc On-demand...
Analysis of AODV in MANET-based NCS
AODV在移动自组网络控制系统中的应用研究

WU Chun-xue,HAN Wen-dong,
邬春学
,韩文冬

计算机应用 , 2007,
Abstract: 在对AODV的路由建立及路由维护机制分析的基础上,结合移动自组网络控制系统(NCS)中数据传输的特点,对AODV的路由维护机制做了改进,即当链路中断时立刻由影响到的源节点发起路由建立,以减少网络延时。NS2仿真结果表明,当网络规模不大时,改进后的协议能有效减少移动自组NCS端到端平均延时,有助于提高系统的可靠性。
Overlay network-based least-cost scheduling strategies for NCS
基于覆盖架构的NCS最小代价调度策略

WU Chun-xue,GUO Xian-hui,
邬春学
,郭贤辉

计算机应用 , 2008,
Abstract: 将覆盖网络引入到基于Internet的网络控制系统(NCS)中,讨论了一种适合于Internet网络控制系统的相近最小代价调度(MLCS)策略,并对其进行了优化.通过仿真系统表明,该基于覆盖网络的调度及其优化策略能有效地保证网络服务质量QoS,从而提高NCS的性能.
Analysis of GA in overlay-based NCS
遗传算法在Overlay-NCS中的应用研究

WU Chun-xue,GUO Xian-hui,
邬春学
,郭贤辉

计算机应用 , 2009,
Abstract: Because of random and uncertain delay, Internet can not guarantee QoS requirements of Internet-based remote Networked Control System (NCS), such as real-time performance, thus affecting the stability of NCS. This paper combined the data transmission characteristics of remote NCS, using Overlay Network to improve the basic network QoS services and genetic algorithm and simulated annealing to optimize Overlay Network costs. These strategies can guarantee the reliability of remote NCS. It was illustrated through the simulation experiments that the strategies in the paper can minimize Overlay Network total costs on the basis of meeting the delay requirements of the remote NCS. It was helpful to the deployment of the control system in the Internet.
2,8-Dimesitylboranyl-6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine
Chun-Xue Yuan
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536811051051
Abstract: In the title compound, C51H56B2N2, a substituted Tr ger's base, the dihedral angle between the two benzene rings constituting the Tr ger's base framework is 104.42 (6)°. The crystal structure is stabilized by C—H...π and weak C—H...N interactions.
Analysis and improvement of performance of mobile sinks sensor networks based on stochastic mobile model
基于随机移动模型的移动sinks无线移动传感器网络性能分析与改进*

YU Hua-ping,GUO Mei,WU Chun-xue,
余华平
,郭梅,邬春学

计算机应用研究 , 2010,
Abstract: Introducing WSNs is an effective method to solve the problems, such as network connection, energy balance,network lifetime and capacity.The mobility mechanism of mobile sinks can directly affect the network performance.Firstly,studied the architecture of mWSNs. And then,analyzed the network performance based on stochastic mobile model.Thirdly,proposed a new random mobile model that could provide zero data packet split rate.Theoretical analysis and simulation results show that the new model can improve the network performance such as delay and zero data packet split rate.
WSN Energy-Saving Research of Integrating RFID
融合RFID 的无线传感器网络节能研究

WU Chun-Xue,TAN Shi-Lai,LIU Lei,
邬春学
,谭石来,刘磊

计算机系统应用 , 2012,
Abstract: According to the issues of saving energy consumption of sensor nodes and balancing energy consumption of each node in the whole network, this paper proposed a wireless sensor network energy-saving method of integrating RFID design and optimizing the routing protocol. The method firstly respectively integrated RFID Tags and Readers with wireless Sensor Nodes as well as wireless devices, and then made the analysis and design for the strategy of the integration, and finally combined with the idea of the LEACH algorithm. The experiment simulation results demonstrated that the new proposed method was prior to the traditional LEACH algorithm in the terms of prolonging the network life cycle and reducing the energy consumption of the whole network.
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