核电站仪控系统的测试系统

核电站仪表控制系统是核电站的神经系统,它直接关系到核电站安全、可靠和稳定的运行,需对核电仪控系统进行测试.在开发核电站仪控系统的时候,需要设计相应的测试系统来验证和确认仪控系统.     

城镇民用燃气安全联锁设计

通过城镇民用燃气安全联锁设计,对民用燃气系统中燃气泄漏及时报警并联锁切断供气线路控制阀门,避免引起火灾、爆炸等重大事故的发生。以新建生产指挥中心厨房操作间为项目背景的条件下,进行安全连锁设计。安全联锁设计通过可燃气体报警器、报警控制器、切断阀等3种仪表实现联锁报警功能,安全联锁设计主要包括:仪表选型、设计注意事项、联锁控制等3部分内容。对城镇民用燃气进行安全联锁设计,大大降低了由于燃气泄漏发生重大事故的概率,为以后同类设计提供了借鉴。     

数字化变电站测控系统的研究与实现

研究IEC61850标准,建设数字化变电站。从变电站的构成,智能化电网的建设及变电站的分层定位,操作画面的功能,同期断路器的操作进行设计与实施。在系统中的智能电子设备(IED)采用了Sepam1000+系列微机保护测控装置和监控仪表PM500使系统智能化更高,用高速以太网组成的通讯网使系统可靠、安全。经过一年多的运行证明,变电站运行效率高,操作更为方便,提高了变电站自动化的程度。     

一种高精度信号隔离装置的设计

信号隔离装置作为生产现场一次元件与DCS系统、PLC控制系统、显示仪表之间连接不可或缺的组成部分,对整个控制系统的控制精度、产品质量有着至关重要的作用。因此对现有的信号隔离系统进行研究,设计出一套新型的信号隔离装置系统。     

仪表自控率的动态显示

ExperionPKS系统在辽阳石化炼油厂成功的运用，满足各种自动化应用要求，有串级控制，分程控制和超池控制，是高性能、高灵活性、高可靠性的控制系统。炼油厂加氢三车间三套装置的DCS控制系统全部实现了仪表自控率的动态显示，在控制室的计算机上，就能查看即时状态下各仪表回路投自动情况．．仪表自控率是生产装置自动化水平的具体体现，仪表的自控率越高，越能反应出该装置生产效率高、能耗小、创效能力强。因此，辽化公司对各装置的自控率有着严格的考核标准。为了直观的反应仪表自控率，实现对装置运行状态进行即时的监控和科学的考评．．成功的将HONEYWELLPKS系统的内部参数PIDA．MODEFL．MAN．通过一个转换模块TYPECONVER，把布尔输入量转换成浮点输出量，利用ADDA求和模块，计算总的手动输出个数，再创建一个CM模块，通过组态计算出自控率数值，得出了自控率的动态显示。     

柴油加氢脱硫装置的DCS组态软件设计

以柴油加氢脱硫装置为对象,运用浙江中控设计的ECS-700系统对其进行DCS组态软件设计。首先根据现场加氢脱硫装置的特点,介绍了柴油加氢脱硫系统的工艺过程和控制方案;其次阐述了DCS设计中包括硬件组态、软件组态中的具体操作步骤;最后对工艺现场监控软件系统进行模拟仿真,仿真结果显示所设计的系统画面真实、动态效果好,能满足控制要求。     

车轴自动涂油机系统的应用设计

文章通过对沧州机车车辆维修分公司机车车轴涂油工艺路线进行改造,设计车轴自动涂油机以减小工人的劳动强度,降低安全风险,提高铁路机车车轴检修效率。此方案设计了直流车及交流车两种尺寸车轴的涂油工位、自动供漆系统及控制系统,以实现机车车轴检修中的自动涂油作业。自动车轴涂油机系统可以实现铁路机车车轴防锈油、防锈漆的全自动涂刷作业,减少操作人员数量,降低工人劳动强度,消除安全隐患,压缩作业空间。但是自动涂油装置要求涂油位置必须准确、涂料供给控制必须精确,所需要的自动供油系统、涂油执行装置、烘干系统及车轴驱动系统必须连锁控制,这对自动车轴涂油机控制方案的自动化程度及结构的合理性提出很高要求。同时,对设备的结构形式及构造特点进行论述,为后续设计提供参考。     

基于Android车载虚拟仪表人机界面设计

提出了利用Google的Android作为车载虚拟仪表人机界面的软件开发平台。在Android系统框架上实现虚拟仪表的人机界面,阐述了如何对 Android 现有系统框架进行裁剪和调整,使系统更加符合车载虚拟仪表人机界面的要求,利用Android 提供的组件设计虚拟仪表人机界面的各个功能逻辑模块,使得模块设计更加合理,模块之间的耦合性更小。设计了基于REAL210车载仪表人机界面,结果表明,基于Android 的虚拟仪表人机界面功能更加丰富、操作更加友好、易于升级和维护,能较好地满足用户的需求。     

飞行模拟器仪表仿真的设计与实现

飞行模拟器正是训练飞行员的重要地面训练设备,是经济、高效、安全的训练方式。本文应用GL Studio软件对飞行模拟器的重要部分仪表系统进行仿真模拟,完成仪表系统的设计。详细介绍了仪表系统的建模过程,仪表代码的编写及实现。     

丙烷脱沥青装置ESD系统的设计与组态

克拉玛依石化公司新建的丙烷脱沥青装置具有高温高压、易燃易爆、工艺复杂而连续性强、安全要求高等特点。本装置在DCS的基础上,引进了当前国际先进的安全仪表系统-ESD紧急停车系统。本文针对ESD紧急停车系统在丙烷脱沥青装置上的应用,重点介绍在仪表部分工程实施过程中TRICON系统的硬件组态．包括卡件组态和I,0点组态;SOE的功能及其实现过程;逻辑编程;以及INTOUCH人机界面组态和系统调试等各方面的技术实现。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks