引入乘客动力学的1/2车辆液压主动悬挂系统建模与控制

建立了引入乘客动力学以及考虑液压装置动态特性的1/2车辆非线性主动悬挂模型，并在此模型的基础上提出了线性二次型最优控制与非线性Backstepping方法相结合的控制策略．仿真结果验证了该控制策略的有效性．     

基于LabVIEW的工业色谱仪仿真系统研究

南于工业色谱仪在线运行状态时不允许工作人员随意操作，使用很不方便。为此，采用LabVIEW语言开发了CX8800工业色谱仿真系统；重点介绍了仿真系统界面设计中的仿真键盘、色谱峰自生成和谱图处理的编程方法。据此，用户可在PC机上模拟工业色谱仪的操作。了解仪器的分析过程，掌握色谱仪在工业过程中的使用知识，对培训工业色谱仪操作人员及优化操作条件具有明显的实用价值。     

基于EBCOT和多小波的图像压缩编码

多小波是近年才发展起来的矢量小波理论,同时具有正交性、对称性、短支撑和较大的消失矩等多个良好特性,这就意味着多小波将可以对信号提供一种更新的分析手段。本文充分利用多小波分解系数的结构,采用EBCOT图像压缩算法,对多小波系数进行压缩处理,得到一种比较有效的多小波图像压缩方法。     

基于模糊控制的风光互补电源模型研究

文章从时间和地域二方面阐述了风光互补电源系统的优越性,并在实践的基础上说明系统硬件的主要组成和系统管理、充电过程等的软件流程。同时结合风光互补电源的特性,提出了基于模糊控制的双标三阶段浮充法。整个系统的控制和管理构建在基于MCU的智能管理核心。文章的最后简述了系统在广场照明系统的应用。     

舞阳钢铁公司轧钢厂立辊主传动系统全数字化电气技术改造

本文介绍了舞阳钢铁公司轧钢厂立辊主传动系统全数字化电气技术改造项目,对原有系统存在的问题以及改造方案和改造后的效益进行了详细说明。     

C8051F021在滚动轴承测试中的应用

C8051F021是一款完全集成混合信号单片机。本文将其应用到滚动轴承测试中,实现了便携式滚动轴承测试仪,提高了系统性能和系统集成度。文中介绍了系统的硬件结构,并给出了数据采集的关键程序。     

无线PDA控制的智能家居平台

结合无线技术和嵌入式技术设计并开发了智能家居程监控系统,对系统的结构框架、具体功能以及实现都做了详细介绍。用户通PDA遥控家庭设备,家庭网关能接收并解析用户的控制命令,按照用户要求执行具体操作,也可把状态信息和报警信息反馈给用户终端。     

一种用于MIMO-OFDM系统的检测方案

将正交频分复用(OFDM)、码分复用(CDM)应用到多输入多输出(MIMO)系统,给出一种空频联合的SF-VBLAST检测方案,选用了合适的CDM转换矩阵,模拟实验证明该方案具有良好的频率分集性能和高频谱效率。     

QoS Model of a Router with Feedback Control

The Internet has evolved into a shared, integrated platform of a broad range of applications with different Quality‐of‐Service (QoS) requirements. Routers are an important part of the Internet and play a critical role in assuring QoS. A router is usually placed between two networks to receive data packets from one network and then transmit those data packets to another network if necessary. Data packets are the actual units of data traveling on computer networks. A data packet has two parts: header and data. The data carries messages, such as e‐mail text, from computer applications. The header carries information that is required to control and manage the transmission of the data packet on computer networks. Existing approaches for providing QoS involve prediction or estimation for traffic characterization to determine parameters required of static traffic admission control. However, prediction or estimation inaccuracy in traffic characterization can result in inappropriate parameter settings for static admission control and, in turn, compromise QoS or resource utilization. This study presents a QoS model of a router with feedback control that monitors the state of resource usage and adaptively adjusts parameters of traffic admission control to overcome prediction or estimation inaccuracy and achieve a balance between QoS and resource utilization. The QoS model of a router with feedback control is simulated to test its performance on QoS and resource utilization in both heavy and light traffic conditions. The performance of the QoS model of a router with feedback control is also compared with that of two basic QoS models of a router with static admission control using admission control parameters resulting from over‐ and under‐characterization of traffic, respectively. The simulation results show that the QoS model of a router with feedback control achieves a better balance between QoS and resource utilization than the basic QoS models with over‐ and under‐characterizations of traffic in the heavy traffic condition. This study also shows that the three models of routers demonstrate similar QoS performances and resource utilization in the light traffic condition. Copyright © 2005 John Wiley & Sons, Ltd.     

铝细化剂的研究进展

分析比较了稀土、AlTiC，AlTiB三种铝细化剂各自的制作方法、性能特点，并进一步阐述了它们细化纯铝的机理和存在的问题，由此提出了一条更为有效的、利用复合细化剂进行纯铝细化的新方法。