广西电力调度程控交换机组网及应用

随着调度程控交换机在电力系统中的应用，使调度程控交换机组网成为可能。通过对调度程控交换网的改造，从网络结构、编码方式等方面，介绍广西电力调度程控交换机的组网体制以及应用情况。     

Y2K问题对程控交换机系统的危害及解决对策

阐述程控交换机系统的计算机２０００ 年问题（Ｙ２Ｋ 问题） 对系统的影响和危害，包括相应软件包可能出现的５ 种故障情况，制订出解决Ｙ２Ｋ 问题的实施方案；对程控交换机系统硬件进行更换的同时，对软件也进行了升级改造，使系统功能得到加强，运行状态显著提高。     

REDCOM交换机的维护与常见故障处理

REDCOM IGX系列交换机是全分散数字程控交换机，它是由容量极小的模块交换单元组合而成，具有可靠性高和操作维护方便的特点。文章首先介绍了REDCOM系列交换机中IGX交换机的特点以及软硬件管理维护中应该注意的问题，重点分析了IGX机的常见故障，并对几种典型的故障处理实例     

CTI技术在调度交换机中的应用

以Harris交换机为例，详细介绍了基于CTI技术的调度交换机系统的软硬件结构和呼叫过程，分析了各项功能的实现方法。最后与传统调度交换机作了简单的比较，阐明了优势所在。     

计算机电话一体化技术在调度交换机中的应用

以哈里斯（公司）交换机为例，介绍了基于计算机电话一体化技术的调度交换机系统的软硬件结构和呼叫过程，分析了各项功能的实现方法。并与传统调度交换机作了比较，阐明了其优势。     

程控用户交换机电源不良故障五例

在程控用户交换机维护中，电源质量的问题较容易被忽视。文中通过对程控用户交换机5例电源不良的故障现象、故障原因的分析以及故障的解决，为程控用户交换机的实际维护提供参考。     

如何处理交换机联网中出现的问题

交换机正常稳定的运行，对于保证电力生产、调度、企业管理和生活的正常是及其重要的，文章对运城供电分公司交换机联网中出现的问题进行分析总结，列举了交换机运行过程中几个故障实例，并提出相应的解决办法。     

程控交换机公共控制单元的故障特点与维修

介绍了程控用户交换机的公共单元故障特点、维修方法，并对HARRIS交换机的故障实例进行分析。     

Q信令的功能及应用解析

对QSIG信令(简称Q信令)的功能进行简要分析，并介绍珠海发电厂交换机应用Q信令的情况，包括实现2区交换机之间的联机，及与省电力通信专同的汇接等。     

赫思曼推出独有的协议集成型工业交换机

赫思曼分别为三大主流标准协议ProfiNet．EtherNet／IP和Modbus TCP推出了独有的协议集成型交换机，是首家提供广泛应用解决方案的制造商。协议通过fimware上传集成到交换机中，它们可以是卡轨式交换机，模块化交换机或是骨干网交换机。这样就能使用统一调试工具进行配置和监控整个网络，并且即插即用。     

基于DSP和FPGA的转台控制器的设计实现

在电磁散射特性测试系统中,要求承载被测物体的转台能按照设定的速度、角度和角度间隔转动.本文设计的控制器基于DSP和FPGA的协同作业,DSP控制系统的执行流程,FPGA并行控制各个模块的运行.控制器通过它的前面板或主控计算机可以设定转动数据,启动后,它输出脉冲控制步进电机带动转台按照要求转动,同时显示转过的角度,并具有与测试设备和计算机实时通讯的功能.测试结果显示,控制器可以实现转动的各种要求,输出频率线性启动或停止的方式可以使转动角度的精度满足0.01度的要求.     

电快速瞬变脉冲群干扰频谱分析及其导致微机保护非正常重启实例

电快速瞬变脉冲群干扰(EFT/B)是微机保护装置最易受到影响的干扰之一,当干扰水平超过了装置逻辑元件和逻辑回路的抗干扰水平时,将引起装置不正常工作或程序运行出错。通过一个微机保护装置受到干扰导致频繁重启的实例,采用实验的方法分析并查找出了继电器触点弹跳是产生本例EFT/B干扰的主要原因,通过更换不同型号的继电器减少了EFT/B干扰的耦合程度,可靠抑制了EFT/B干扰。还根据国际IEC和IEEE标准对EFT/B波形进行了理论分析,在拉普拉斯变换和傅里叶变换的基础上通过几种不同方法计算了EFT/B波形的频谱,给出了工程实践中既简单又合理的计算方法,并试图通过分析EFT/B波形的频谱分布,使得对EFT/B的电磁干扰的防护更具有针对性。     

Workplace of the Future

IT IS IMPORTANT to talk about the future, especially in an area of human activity, where changes are occurring at such a rapid rate as is the case of the workplace. Someone once said, "if you do not know where you are going-any road or path will get you there." Unfortunately, the inverse is sometimes also true: "if you know where you are going-no road will lead you there." I do not think that is the case with the problem at hand.     

The second wave

Steve Wainwright, general manager for Freescale Semiconductor in Europe, the Middle East and Asia, reckons you can feel the benefit of microelectromechanical systems (MEMS) whenever you sit in a car: "If you feel you are a better driver than you were ten years ago, I would say that it?s down to the MEMS in the electronic stability controller."     

How full is your glass?

Do you have a low boredom threshold? Perhaps you are walking too fast and trying to cram too much into your day? If you also eat quickly, finish others? sentences and look at your watch too often, you may need a Relaxation Room.     

Airport of the future

It's not much fun sitting in an airport waiting for a plane. But might it be less of a chore if you could download your in-flight films in the departure lounge? Might you even pay for the service? If you find that airport bars usually serve the best antidotes to tedium, would you be glad to know that a nearby display can detect your presence, prompt you when your gate number changes and provide clear directions to it at drinking-up-and-boarding time?     

Workshops and short courses

If you wanted to contribute to Microwave Week 2009, you had several opportunities beyond a standard paper submission: you could offer a serious short course if you were an established expert in your field or you could organize a workshop for colleagues in your field. New for International Microwave Symposium (IMS) 2009, workshops and short courses were solicited through a call for proposals in each area. These solicitations contain detailed information, and both are still readily accessible at www.ims2009.org.     

Fuelled by the feel good factor

What is happiness? One thing is for sure, it certainly is not complete plenitude. Imagine a world where there was no shortage of energy: where you could drive as far and as fast as you wanted at no cost, and could use as many appliances as you asked for and for as long as you wished. The total empowerment that would arise from that would be sickening.     

Career Management?Letting It Happen or Making It Happen?

How are you doing? Stuck on the ladder or still climbing? Although largely evolutionary, career development is more responsive to your efforts than you may think (but, don't let your boss catch you reading this!).     

The way ahead

As you talk to IEEE volunteers and leaders and read through IEEE announcements, you may encounter the relatively new acronym MGA. What is MGA? What does it stand for? Is it just another department in the huge IEEE worldwide organization? In this issue, I will share my thoughts on MGA with you.