Implementation of dynamic matrix control on field programmable gate array

High performance computer is often required by model predictive control (MPC) systems due to the heavy online computation burden. To extend MPC to more application cases with low-cost computation facilities, the implementation of MPC controller on field programmable gate array (FPGA) system is studied. For the dynamic matrix control (DMC) algorithm, the main design idea and the implemental strategy of DMC controller are introduced based on a FPGA’s embedded system. The performance tests show that both the computation efficiency and the accuracy of the proposed controller can be satisfied due to the parallel computing capability of FPGA.     

基于Linux下MiniGUI的图像处理GUI平台设计

目前嵌入式技术产品被广泛应用于社会的各个领域,因此,为它们设计直观、实用、易于操作的人机交互界面越发迫切.提出了一种基于MiniGUI/Embedded图像处理系统的设计方案,重点讨论了该方案所采用的图形支持系统MiniGUI、人机交互界面的设计和实现过程、事件消息驱动机制在该系统设计过程中的应用,以及图像处理系统和人...     

廊坊至涿州高速公路标线及护栏设计的技术要点

通过项目的标线及护栏设计实践,阐述标线及护栏设计的技术要点,结果证明,项目提出的设计方案是成功之举,值得同行借鉴。     

中国城市道路规划方位性问题研究

文章结合中国的传统建筑文化理念和现代科学原理,从历史文化、能源节约、环境保护、房地产定价、交通安全等多方面分析研究了城市道路在规划和设计时所应遵从的定向规则。     

浮置板式轨道结构隔振效果仿真研究

建立列车—轨道结构耦合系统有限元模型,将轨道不平顺作为列车—轨道结构耦合系统的激励源,对普通碎石道床轨道结构和浮置板式轨道结构的列车—轨道结构耦合系统动力学性能进行仿真研究,对比分析这2种类型的轨道结构系统振动响应与系统振动传递函数,评价浮置板式轨道结构的隔振效果。分析结果表明,浮置板式轨道结构与普通碎石道床轨道结构相比,振动加速度降低约70%,距线路5 m处大地振动加速度响应峰值降低约62.8%,相应Z振级衰减约10 dB,竖向振动加速度频率范围由0~200 Hz降到0~60 Hz,有效起到了振动隔离效果。     

Special issue: Importance of public transport

The transport demand in most major cities around the world can only be met with a high‐quality public transport system. The requirements on bus, rail, underground and tram systems are manifold with reliability and efficiency as the key factors. The service operating hours and the size of the network are often extended in order to serve the needs better. Further, most metropolitan areas are trying to provide more incentives for citizens to leave the car at home and use the local transit systems instead. The reasons are well known. Not only does a public transport system only make economical sense if it is well used, but most urban areas with a high car‐dependency face at least three major problems; safety, congestion, and pollution (noise and air pollution, land separation, etc.). It is generally recognised that to decrease car usage and to increase public transport usage a stick & carrot approach is needed. The London congestion‐charging scheme is an example since all revenues collected by the scheme are put into the improvement of bus and underground services.     

多媒体教学网的设计与应用

介绍了不同类型多媒体教学网的特点、多媒体教学网的硬件要求以及常见多媒体教学网的教学功能。结合工作实际介绍了多媒体教学网的使用方法。     

基于XML技术的RFID系统电子标签自适应性研究

随着RFID技术在物流领域的应用日益广泛,一些问题也逐渐显现。RFID系统中所用的电子标签的标准具有多样性,造成了不同物流企业间信息交流的困难,以及企业内信息系统升级的困难。XML技术的出现为这一问题提出了解决方案。XML是以文本格式出现,电子标签的操作协议也是以文本格式出现。所以对于新出现的电子标签协议,按照既定的格式加入到XML文本中即可,使得物流信息系统的升级简便易行,系统的生命周期得以延长。     

进入油船封闭处所的安全问题

介绍了人员进入油船封闭处所的潜在危害,针对这些可能存在的危害,分析了进入油船封闭处所应特别注意的问题,同时提出相关建议。