高校网络实验室建设方案探讨与设计

高校强调培养动手能力强、生产一线的技术型人才,很多高校瞄准市场对网络人才的需求,纷纷开办网络专业,但目前很多学校网络专业没有很好的实训条件的支撑,导致毕业的学生动手能力不强,不受市场欢迎的尴尬局面．针对这种现象文章论述了建设网络实验室的意义．提出建设的原则。给出满足当前网络技术需求的网络实验室典型解决方案,在此方案基础上设计了网络实验的内容．     

将硬件引入“面向对象程序设计”课程实验教学

针对“面向对象程序设计”课程实验内容的设置容易使学生产生学之无用的思想及学后不会用的问题,结合电子信息专业培养特色,压缩了传统的、基本的实验内容,增加了应用性强的实验项目,并将硬件引入实验教学。实践表明,改进后的实验教学模式效果良好。     

XDPS-400分散控制系统常见硬件故障分析及处理

分散控制系统(DCS)对于热电厂的安全运行起着重要的作用,以在河南永城电厂应用的XDPS-400系统为例,讨论了DCS系统最常见的硬件设备故障,分析了造成故障的原因,并提出了相应的解决方案.     

Evolving antennas <Emphasis Type="Italic">in-situ</Emphasis>

Evolvable hardware, particularly evolvable electronic circuitry, is being vigorously explored as a means to enhance performance and survivability. However, antennas are also excellent candidates for evolvable hardware, as they are crucial components in any wireless system, and changes in the environment can seriously affect antenna performance. The evolvable antenna system in this paper shows that an evolutionary algorithm and a reconfigurable antenna can be used to optimize signal reception in-situ, i.e., in real surroundings, rather than in simulation or even on an antenna range. Several reconfigurable antenna topologies were tested, and all were able to outperform a conventional antenna.The research described in this paper was performed for the Evolvable Hardware program at the Center for Integrated Space Microsystems, Jet Propulsion Laboratory, California Institute of Technology, and was sponsored by the National Aeronautics and Space Administration. We are very grateful for their support. Thanks also to G.R. Freeth for his feedback regarding using AM signals to determine signal strength.     

Routine automated synthesis of five patented analog circuits using genetic programming

This article reports on a project in which we browsed patents issued after January 1, 2000 to commercial enterprises or university research institutions for analog electrical circuits. We then employed genetic programming to automatically design (synthesize) entities that duplicated the functionality of five post-2000 issued patents. The automated method works from a high-level statement of the circuits intended function. The article addresses the question of what is actually delivered by the operation of the artificial problem-solving method in relation to the amount of intelligence that is supplied by the humans employing the method (something we refer to as the yield of an automated method). The article also addresses the question of the routineness of the artificial problem-solving method – that is, the amount of effort required to make the transition from problem to problem within a particular domain. The conclusion is that the artificial method routinely delivers high-yield, human-competitive (i.e., previously patented) results.     

Evolvable hardware techniques for on-chip automated reconfiguration of programmable devices

While complete automated design is a harder problem than computer-assisted design, automated hardware reconfiguration is an even more challenging problem, because it needs to adjust to limited resources and various factors, such as noise and parasitic capacitance, a resistance and inductance. This paper presents some experimental results of on-chip automated design and reconfiguration using evolvable hardware techniques. It describes a stand-alone board level evolvable system, and its use to demonstrate on-chip synthesis of new circuits in only a few seconds. The experiments presented here indicate a recovery capability in the case of extreme environmental conditions, such as extreme temperatures, that adversely affect electronics. Some of the difficulties of dealing with the real hardware are exposed, as well as challenges more generally related to automated evolution of complex electronic systems.The work described in this paper was performed at the Center for Integrated Space Microsystems, Jet Propulsion Laboratory, California Institute of Technology and was sponsored by the Defense Advanced Research Projects Agency and by the National Aeronautics and Space Administration.     

ATT7022B在电力参数测量中的应用

为了详细分析ATT022B在ARM上的实际应用的方法,阐述了电能芯片ATT022B的特性和工作原理,并结合在矿用综合保护器项目中对各项电力参数采集的应用,给出了LPC2292与ATT7022B硬件接口设计和软件编程实现方法.利用该设计能够很好地测量各项电力参量,极大地减小了计算上的误差和设计复杂性.测试的结果表明ATT7022B具有精度高,操作方便等优点.     

数字式三相智能电能表的研制

介绍了一款基于单片机Atmega128的三相数字式智能电能表的研制,从电路硬件选型、电路设计及制作进行论述。所设计的智能电能表与同类产品相比具有集成度高、功能强、成本更低廉、抗干扰能力强、功耗低等优点。随着未来电能智能化管理及电能表集抄需求,该款表具有很大的应用前景。     

基于VC＋＋的仿真训练系统编程

给出了以PCI-I64IOT型I/O卡为核心的硬件接口电路和软件设计思想,详细分析了编程方法。实践表明,利用该系统能完全实现侦察专业的全部训练科目,满足部队和院校训练的需要。     

一种用于继电保护装置调试的多功能测量仪

介绍了一种用于继电保护装置调试的多功能测量仪,详细说明了测量仪的硬件构成原理、软件实现方法和抗干扰措施。该仪表以８０９８单片机为核心,具有量程自动转换功能,并配有微型打印机,实现汉字打印输出。该测量仪功能齐全,可完成电压、电流、频率、相角、阻抗及继电器动作时间等多种信号的采集、处理、显示和打印。