Multi‐surface sliding control for fast finite‐time leader–follower consensus with high order SISO uncertain nonlinear agents

In this paper, multi surface sliding cooperative control scheme is presented and new multiple sliding surfaces are proposed. It is proven that, for the setup that each agent is described by a chain of integrators, where the last integrator is perturbed by a bounded disturbance, leader–follower consensus can be achieved on these sliding surfaces if the communication graph has a directed spanning tree. Also, sliding variables can be driven to the sliding surfaces in fast finite time by the nonsmooth control law. The fast finite‐time Lyapunov stability theorem, the terminal sliding control technique, and the adding a power integrator design approach are used in our proposed control. Simulation results demonstrate the effectiveness of the proposed scheme. Copyright © 2013 John Wiley & Sons, Ltd.     

高速RFID编码解析服务器软件的设计与实现

分析RFID(Radio Frequency Identification)编码解析网络特点,总结FID编码解析服务器软件在设计时需要面对的挑战。通过选用ACE(Adaptive Communication Environment)网络编程技术,使用Reactor框架作为网络模块的核心,Dispatch模式进行基于角色的业务分发,实现了一种高速的RFID编码解析服务器软件。     

RFID在现代军事领域的应用探讨

本文对RFID在现代军事领域的应用进行了概述,列举了现代战争中成功的RFID应用。对军事领域RFID技术上的一些重要问题进行了分析。借鉴国外的经验,对军队,企业和院校紧密结合发展现代军事领域RFID的思路进行了探讨。     

一种铅笔滤镜生成算法及其在GPU上的实现

提出了一种基于卷积算子的铅笔滤镜生成算法,通过分析真实铅笔纹理的结构特征,抽象出铅笔笔画的简单数学模型.根据该模型可以方便地确定其对应的笔刷模板(卷积算子),进而获得用户所需要的铅笔纹理.本文将该算法与图形处理单元(GPu)相结合,借助于GPU的硬件加速功能成功地实现了对视频图像的实时铅笔画风格绘制.     

GIS在电力配网系统的应用及价值

随着经济社会的转型升级,配电网的规模越来越大。技术与设备密集型企业的增多,对电力配网系统提出了更高的要求。介绍了配电GIS系统的建设意义、系统设计目标及其在电力配网系统中的应用。     

磁盘备份系统的快速数据恢复方法

使用磁盘来替代磁带作为备份系统的存储介质,并且研究通过快照技术、增量传输、快速定位目标数据等技术来实现快速高效的数据恢复.实现了集成这些技术的原型系统A-Backup,在该系统中不仅实现了快速恢复数据,还具备以往磁带备份系统所没有的特性,如增量备份、可以查询已备份数据、无须管理员值守等.     

城市规划管理信息系统中用户权限管理方案实现

该文针对城市规划管理信息系统中安全性管理的要求,借鉴大型数据库的角色管理概念,提出了一种基于岗位角色的用户权限管理的方案,并对权限设置的原则和方法进行了探讨,通过在南京市规划管理办公自动化系统中的应用,表明此方法是可靠和实用的。     

一种改进型动态无功优化模型及其求解算法

动态无功优化是提高电力系统运行经济性和安全性的重要措施。在动态无功优化常规模型的基础上,将同一节点的若干组电容器等效为1个集中变量,用对集中电容器组的约束代替常规的单组电容器约束,给出与之完全等效的电容器组动作次数约束值和投切方法;针对动态无功优化模型的非线性、大规模性、控制变量的离散性和连续性共存的难题,对用于离散非线性优化的蚁群算法作了充分研究,提出了内点法与蚁群算法相结合的动态无功优化混合算法。IEEE14测试系统的仿真结果验证了改进模型及算法的有效性和可行性。     

A General Low-Cost Indirect Branch Prediction Using Target Address Pointers

Nowadays energy-efficiency becomes the first design metric in chip development. To pursue higher energy efficiency, the processor architects should reduce or eliminate those unnecessary energy dissipations. Indirect-branch pre- diction has become a performance bottleneck, especially for the applications written in object-oriented languages. Previous hardware-based indirect-branch predictors are generally inefficient, for they either require significant hardware storage or predict indirect-branch targets slowly. In this paper, we propose an energy-efficient indirect-branch prediction technique called TAP （target address pointer） prediction. Its key idea includes two parts： utilizing specific hardware pointers to accelerate the indirect branch prediction flow and reusing the existing processor components to reduce additional hardware costs and power consumption. When fetching an indirect branch, TAP prediction first gets the specific pointers called target address pointers from the conditional branch predictor, and then uses such pointers to generate virtual addresses which index the indirect-branch targets. This technique spends similar time compared to the dedicated storage techniques without requiring additional large amounts of storage. Our evaluation shows that TAP prediction with some representative state-of-the-art branch predictors can improve performance significantly over the baseline processor. Compared with those hardware-based indirect-branch predictors, the TAP-Perceptron scheme achieves performance improvement equivalent to that provided by an 8 K-entry TTC predictor, and also outperforms the VPC predictor.     

浅析铁路视频监控网络传输研究

本课题研究基于目前铁路通信网络广泛采用的组网构架,重点对视频流的网络传输性能及相应承载优化技术进行分析。旨在细化各指标组成,找出影响性能指标的关键因素,为各组成系统的优化提供技术分析和数据支持。本文将从视频网络系统组成,视频网络设备响应性能、MSTP承载视频的带宽效率研究、MSTP交换功能的性能研究四部分综合阐述。