网络传感器在机器人感知系统中的应用研究

本文针对网络环境下机器人感知系统信息获取技术，结合IEEE1451.2网络传感器设计 思想，提出一种即插即用机器人感知系统节点的设计方法，并针对具体感知节点提出一种在 线编程的方法，即可在线修改感知系统节点中具体的传感器／执行器的有关参数，如：生产 厂家、日期、校准参数等；并给出了网络环境下机器人感知系统的网络拓扑结构以及数字接 口．     

无线局域网研究

介绍了WLAN概念,以及WLAN与有线局域网相比具有的优点,同时给出了WLAN的组网方式和所遵循的协议规范以及在安全性方面如何实现,以实例体现了WLAN在公司办公室中的具体应用。     

IEEE802.11i无线局域网安全标准分析

随着无线网络的蓬勃发展，无线网络的安全问题引起了越来越多的企业、组织和个人的关注。该文对刚推出的IEEE802．11i无线局域网安全标准进行了全面系统的分析，最后指出了其仍存在的一些问题。     

802.11无线局域网标准与安全

介绍了无线局域网标准IEEE 802．11安全机制，描述了数据加密和用户身份认证机制与过程，以及802．11标准的安全问题。讨论了旨在提高802．11安全性的802．1x协议以及动态密钥管理方法，提出了使用无线局域网应采取的行之有效的安全措施。     

一种基于无线局域网的移动IP快速切换方案

为了使移动节点在无线局域网环境中进行快速有效的切换，我们提出了一种基于管理域的快速切换方案。该方案将多个相邻的无线局域网组成一个单独的域，采用层次管理方式，使域内各个子网通过专用的Mac桥连接，减少了移动节点域内切换过程中产生的注册时延和数据包的丢失。     

无线局域网络综述

无线局域网络利用其自身的使用灵活、安装便捷和易于扩展等优点对有线网络进行补充和扩展。从无线局域网络的发展、存取技术、标准、安全性、组网结构及无线局域网的应用等6个方面对无线局域网络进行了阐述。     

IEEE 802.11无线局域网OPNET建模与性能测试

讨论了IEEE802．11无线局域网的建模和性能问题。基于对IEEE802．11协议和目前功能最强大的网络仿真工具OPNET软件的研究。首先分析了无线局域网的各种行为，分别对这些行为单独建模后，通过有线状态机将它们集成而形成IEEE802．11协议支持模块。给出了模型输入输出接口的详细说明。并对网络的性能进行了分析比较。     

无线局域网的安全性研究

无线局域网已经成为网络体系结构的重要组成部分,同时无线局域网的安全也越来越受到人们的重视。该文重点介绍了IEEE802.11的安全机制,分析其安全缺陷,并对未来无线局域网在安全方面提出了改进方案。     

Numerical and experimental characterization of antenna positioning in a dual-radio mesh router

This paper investigates the influence of the position of the antennas in a dual-radio mesh router by characterizing the router components from an electromagnetic point of view. Since the behavior of a wireless router equipped with multiple devices and antennas can be affected by mutual coupling among several close conducting bodies, numerical and experimental tests are carried out to provide some suggestions for an accurate positioning of the antennas. A reference configuration is implemented in an electromagnetic Computer-Aided Design (CAD) simulator. The most significant numerical results are validated by performing a campaign of measurements in anechoic chamber and deploying a testbed for the derivation of the experimental values of throughput, return loss, power density, and directivity.     

Phasor measurement based on IEC 61850-9-2 and Kalman–Filtering

This paper proposes a new technique for estimating phasors during the transient phenomena in the electrical power systems. Unlike traditional Phasor Measurement Units (PMUs) that estimates phasors at process level, the proposed technique estimates phasors at bay level. The estimation technique relies on a robust recursive Kalman–Filtering, which is employed for computing the phasors based on the time-critical IEC 61850-9-2 Sampled Measured Values casted by the substation Merging Units (MUs). Many evolution tests of the proposed technique have been carried out for both stationary and transient phenomena in power systems to determine the accuracy of the measurements obtained at various conditions. The proposed estimator can produce phasors at bay level with reporting rate of 100 frames per second, which is encouraged in IEEE Std C37.118 and can satisfy higher accuracies than provided by the traditional Phasor Measurement Units, which are 0.01 degree and 0.01% for phase and magnitude, respectively.