统一潮流控制器(UPFC)的控制策略研究

首先在分析UPFC基本原理和主要功能的基础上，运用d—q变换，获得UPFC在旋转坐标系下的动态数学模型。针对电力系统的特点，采用改进交互控制方案构建UPFC的控制系统。最后给出Matlab／simulink环境下的仿真模型和仿真结果。     

Low cost pre-stored video transmission across networks

This paper proposes a simple, practical and low-cost dynamic segmentation and bandwidth allocation scheme, called middle point, to transmit pre-stored video from source to playback destination across networks. The proposed scheme is based on two concepts, playback tunnel and bandwidth tunnel, to determine the segmentation boundary and transmission bandwidth with the objective of reducing transmission cost while guaranteeing the playback buffer neither underflows nor overflows. The performance of the proposed scheme is evaluated by a set of real-life MPEG video traces and also compared with the well-known optimal smoothing scheme. The obtained results show that the proposed scheme can be easily implemented with low complexity and low transmission cost.     

Data Communications for Internet Robots

For Internet robots, the most challenging and distinct difficulties are well recognized to be associated with Internet transmission delays, delay jitter and not-guaranteed bandwidth, which might degrade system performance dramatically or even lead to instability. Current approaches to data communication between the remote robot and the human operator employ directly one of the two currently available protocols, i.e. TCP and UPD. In this paper, a teleoperation-oriented data transmission mechanism is implemented. Compared to TCP, the presented scheme provides minimized transmission delays and delay jitter; in the steady state, its transmission rate is much smoother; when available network bandwidth changes, it adapts to the variation quickly without large overshoot. Compared to UDP, it is inter-protocol fairness convergent, intro-protocol convergent, and efficient convergent. The presented mechanism is deployed in a mobile robot teleoperation system developed. In the experiments, users successfully guided a Pioneer-2 mobile robot through a laboratory environment remotely over the Internet via a web browser.     

电力输送模拟与指挥系统

介绍一种可应用于区域供电管理的微机－模拟屏电力输送模拟与指挥系统。     

基于Linux的嵌入式数字监控系统的设计和实现

对视频监控的现行方案进行了分析比较，详尽分析和设计了系统框架模型，对系统结构和功能作出了描述，给出了具体的实现，并对未来可进行的拓展工作进行了展望。     

履带车辆电传动系统电气机械联合制动优化控制与仿真

根据电传动研究情况,提出了电传动电气机械联合制动优化控制目标;在这个目标下,完成了电气制动控制策略优化,进行了原车机械制动系统在联合制动中制动力的分配,通过试验和仿真说明它的合理性;最后给出联合制动的仿真结果,并进行了分析。     

无线因特网上的数据传输

1.引言 90年代以来,以蜂窝通讯技术为代表的无线通信技术迅速发展,从原来的模拟无线电台、第一代模拟无线电话发展到第二代数字式蜂窝电话、数字式寻呼设备,再到即将进入市场的第三代移动通信技术(3G)以及正在酝酿之中的4G,人们在任何时间、任何地点与任何对象进行通信的愿望正在成为现实。随着无线通讯技术的进一步成熟,人们不满足于仅仅通过无线网络传送语音,还想无线传送数据信息,实现“移动计算”的梦想。而要想真正实现随时随地的“移动计算”,不但要     

电网继电保护及故障信息处理系统关键技术的探讨

根据湖南电网继电保护及故障录波信息处理系统的开发与应用实践 ,以及对国内现有模式和应用情况的分析 ,对该系统中子站设计、远程数据传输、信息组织和高层应用等关键技术问题进行了探讨 ,并给出了部分试验数据和试验结论     

GCC在平台模型MODE上的移植

本文阐述如何在平台模型ＭＯＤＥ上移植ＧＣＣ，并比较了ＭＯＤＥ和ＹＨ－２的差别。     

SDH在上海电网通讯传输网中的应用

介绍了上海电网通讯传输网现状和应用ＳＤＨ的优点，提出并分析了用ＳＤＨ组网和引进设备中应考虑的问题。