PSpice模拟RF-SQUID器件的方法

ＲＦ－ＳＱＵＩＤ器件是一个二阶非线性系统。由于没有解析解，要确定它和由它构成的系统的动态特性。噪声特性以及最佳工作条件，通常要依赖于数值解。这涉及算法的速度、精度、稳定性、软件编程和调试等各种问题，因而是一件费时费力的工作。本文从描写ＲＦ－ＳＱＵＩＤ动态特性的微分方程出发，给出了可被ＰＳｐｉｃｅ接受的ＲＦ－ＳＱＵＩＤ等效电路，使ＲＦ－ＳＱＵＩＤ和由它构成的各种系统的分析和模拟变得简单方便。     

PSpice模拟RF—SQUID器件的方法

ＲＦ－ＳＱＵＩＤ器件是一个二阶非线性系统。由于没有解析解，要确定它和由它构成的系统的动态特性。噪声特性以及最佳工作条件，通常要依赖于数值解。这涉及算法的速度、精度、稳定性、软件编程和调试等各种问题，因而是一件费时费力的工作。本文从描写ＲＦ－ＳＱＵＩＤ动态特性的微分方程出发，给出了可被ＰＳｐｉｃｅ接受的ＲＦ－ＳＱＵＩＤ等效电路，使ＲＦ－ＳＱＵＩＤ和由它构成的各种系统的分析和模拟变得简单方便。     

参数自寻优Fuzzy—PID控制器

在分析了ＰＩＤ控制和Ｆｕｚｚｙ控制的优缺点之后，作者提出了一种新的控制方法即参数自寻优Ｆｕｚｚｙ－ＰＩＤ复合控制。基于这种方法，使用一台单片机对铜材退火炉进行温度控制实验，结果表明这种控制器的性能是优越的。     

高楼恒压供水电气传动及控制系统

对高楼供水电气传动系统方案以及ＰＬＣ变频调速控制技术作了分析，介绍了模糊控制技术的应用，并对ＰＩＤ控制，Ｆｕｚｚｙ控制及Ｆｕｚｚｙ－ＰＩＤ控制应用于高梯恒压供水的优缺点作了比较。运行结果表明，采用Ｆｕｚｚｙ控制及Ｆｕｚｚｙ－ＰＩＤ复合控制均能取得的良好的控制效果，而后者更优于前者。     

高精神激光干涉仪定位系统

ＨＰ公司推出的新产品５５２７Ａ型双叔激光干涉仪的精密测量系统,采用数字控制ＨＰ－１０９３６Ａ伺服轴板为核心组成的闭环位置控制线路,取得了亚微米有的定位精度和重复精度。重点介绍ＨＰ－１０９３６Ａ伺服轴板的功能,推导出具有前馈补偿ＰＩＤ控制器的传递函数表达式,分析ＰＩＤ根轨迹图上零点的位置对伺服系统稳定性的影响,介绍控制器的调研方法,以及采用ＨＰ－３６５２Ａ动态信息号分析仪,可实现伺服轴板的快速调试,     

高精度激光干涉仪定位系统

ＨＰ公司推出的新产品５５２７Ａ型双频激光干涉仪精密测量系统,采用数字控制ＨＰ－１０９３６Ａ伺服轴板为核心组成的闭环位置控制线路,取得了亚微米级的定位精度和重复精度。重点介绍ＨＰ－１０９３６Ａ伺服轴板的功能,推导出具有前馈补偿ＰＩＤ控制器的传递函数表达式,分析ＰＩＤ根轨迹图上零点的位置对伺服系统稳定性的影响,介绍控制器的调试方法,以及采用ＨＰ－３５６２Ａ动态信号分析仪,可实现伺服轴板的快速调试,给出闭环位置控制系统的控制程序。     

带有幅形比检测和非线性控制的宽屏幕电视接收机

宽屏幕电视接收机利用幅形比检测（ＡＳＰＥＣＴＤＥＴＥＣＴＩＯＮ）和非线性控制（ＮＯＮ－ＬＩＮＥＡＲ ＣＯＮ－ＴＲＯＬ）技术对输入的图像和字幕进行全自动控制,应用推断（ＦＵＺＺＹ－ＩＮＦＥＲＥＮＣＥ）技术进行画质控制。     

FUJI GSP—11丝印机操作及工艺

ＦＵＪＩＧＳＰ—１１丝印机操作及工艺南天电子信息产业集团公司邓鸿机（６５００４１）１９９３年３月，我们南天电子信息产业集团公司从日本富士机械制造公司引进了一条包括ＧＳＰ—１１丝印机、ＦＧＬ—１１点胶机、ＦＣＰ—Ⅲ高速贴片机、ＦＩＰ—１１精密贴片机、Ｆ...     

中国UPS市场令EXIDE着迷──访EXIDE北亚太区总裁丘其其先生

美国ＥＸＩＤＥ电子集团股份有限公司是当今世界最大的不间断电源（ＵＰＳ）生产厂商，在美国《幸福》杂志评选的五百家最大工业企业中，ＥＸＩＤＥ是唯一榜上有名的ＵＰＳ厂商。去年ＥＸＩＤＥ公司与另一家生产ＵＰＳ的大型专业厂美国动力机械公司（ＩＰＭ）合并，进一步巩固了其第一大ＵＰＳ生产及销售厂商地位。最近ＥＸ-ＩＤＥ北亚太区总裁丘其其先生来到北京，百忙之中接受了本刊的采访。问：反先生此次来京的目的是什么？答：ＥＸＩＤＥ已成功地建立了美洲市场、欧洲市场，目前正着手亚太市场的拓展，而亚太区最大的市场就是中国。中…     

UPS—600VA不间断电源几个关键技术的处理

本文主要介绍了采用ＳＰＷＭ调制方法，用模拟集成控制器ＴＬ４９４作脉宽调制器件，ＶＭＯＳＦＥＴ做为变换主开关器件研制ＵＰＳ－６００ＶＡ不间断电源中几个关键技术的处理。     

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.     

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.     

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.     

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.     

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.     

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.     

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