服装设备自动化的现状和发展

介绍了服装设备自动化的发展历程。服装设备从纯手工制作设备、机械设备、电动设备发展到自动化设备;服装设备的种类也从早期单一的缝纫设备发展到多样化的服装生产设备,其中包括缝前设备、缝纫设备、缝后设备和其他服装设备。同时,介绍了各种服装设备自动化的现状以及未来的发展趋势。     

5.8GHz频段微功率设备与WLAN干扰分析与实验

本文分析了5.8GHz频段微功率设备对WLAN设备的干扰机理,计算了微功率设备与WLAN设备间的干扰保护距离,并设计实验测试了一款微功率设备对802.11a设备的干扰。     

世界半导体设备的“十大”发展趋势

本文指出了当前世界半导体设备的“十大”发展趋势，即设备与工艺互动化；设备加工晶圆大尺寸化；设备加工晶圆单片化；设备组合化；设备高精度化；设备全自动化；设备制造商垄断化；设备高价格化；设备研制联合化；设备用户化。     

传输系统中通信光纤设备的维护措施

通信光纤设备技术的发展推进了社会的发展,带来了极大的社会效应。本文对光纤通信设备的构成和现状进行了描述,对通信光纤设备的特点进行了深入分析,并阐述了光纤传输设备维护时需注意的问题,研究了光纤传输设备的维护措施,总结了光纤传输设备的维护方法。     

传输系统中通信光纤设备的维护措施

通信光纤设备技术的发展推进了社会的发展,带来了极大的社会效应。本文对光纤通信设备的构成和现状进行了描述,对通信光纤设备的特点进行了深入分析,并阐述了光纤传输设备维护时需注意的问题,研究了光纤传输设备的维护措施,总结了光纤传输设备的维护方法。     

从半导体技术进步看半导体设备的发展方向

本文从半导体技术进步的角度阐述了半导体设备发展的几个主要方向。文章开头综述了半导体设备与器件发展的相互关系、半导体设备的学科综合性及设备市场简况，随后分述了半导体设备大直径化趋势，设备超净化发展，设备单片加工化及复合化，设备日益昴贵化及低成本努力，以及其他一些发展趋势，可供设备与器件两个专业的工作者参考。     

航天测控设备状态配置和管理方法

针对我国航天测控网设备状态配置和管理方法现状,分析了测控设备任务准备和历史任务恢复节点的现实需要,提出了航天测控设备历史状态宏迁移、设备参数共享以及设备状态集中管理3种方法。通过分析比较,给出了设备状态集中管理和可扩展标记语言( XML)格式设备状态共享方法相结合的实现途径。该方法能够实现设备参数的快速设置和检查以及不同设备之间状态的共享,有利于提高整个测控网的自动化程度和运行效率。     

传输设备性能评估技术研究

对传输设备进行性能评估,可为传输设备维护、替换工作提供可靠的依据,同时也解决和避免了传输设备故障,保证传输设备正常工作.本文首先分析了传输设备性能评估的意义,其次对传输设备性能评估技术展开了研究,最后就全文作出总结.     

无线充电设备电磁兼容测试研究

分析了目前无线充电的技术体制以及国际现有的无线充电标准。随后探讨了欧美韩日对无线充电设备的电磁兼容管理情况。研究了我国信息技术设备、ISM设备和微功率设备分类方法和测试标准。最后给出以下我国无线充电设备的电磁兼容测试建议:无线充电设备在我国现有测试标准中的设备分类归属建议,我国的无线充电设备电磁测试方法建议;无线充电设备的管理方法建议。     

某战术数据链测试设备结构设计

介绍了某战术数据链测试设备的系统和整机要求,详细阐述了机箱、整机模块、托架等结构设计思路与方法.通过模块化、小型化的结构形式,提高设备可维修性,在保障结构强度的同时减小了设备体积,降低了设备重量.并对测试设备进行热仿真分析和减振设计,确保设备满足环境适应性要求.     

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.     

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.     

Towards Mobile Ubiquitous Service Environment

In this article we present a perspective on future vision of mobile communications and services which is referred to as Mobile Ubiquitous Service Environment (MUSE). Based on analysis of wireless communications and services, we exploit a conceptual model for MUSE via a top-down approach. The conceptual model consists of three major elements: Terminal Service Environment (TSE), Network Service Environment (NSE) and User Identity (UID). The concept of Always the Best Experience (ABE) is addressed as the hinge in design and development such that the user-centric services could be provided automatically and intelligently in the future diverse wireless world Based on these, we further discuss the issues on design and implementation of architecture of future wireless communication system. Requirements for architecture brought by the new features of MUSE are listed. Moreover, we also address several tradeoffs that should be taken into consideration in design. Finally, the deployment challenges for MUSE, such as reflectiveness of system, security and privacy, as well as peer-to-peer AAA are predicted.Ji Yang received PhD degree on Circuit and System, Bachelor degree on Telecommunication Engineering from Beijing University of Posts and Telecommunications (BUPT) in 2002 and 1993 respectively. Currently, he is an associate professor of BUPT, chief technical supervisor of Wireless Technology Innovation Institute, and vice manager of MTlab of Sino-Germany Software Institute. He leads the research on service and application in Future Forum in China. He also made much contribution to the China Communication Standardization Association (CCSA), including the vision of future Mobile Ubiquitous Service Environment, architecture of future B3G mobile terminal, etc. His research interests include architecture design for mobile ubiquitous networks, theory of self-organization, etc.Zhang Ping is now the professor of Beijing University of Posts and Telecommunications and director of Wireless Technology Innovation (WTI) Institute, BUPT. He has also served on the senior member of C3G Group, China MOST 863 future mobile communication FuTURE project, vice-chairman of China FuTURE Forum, and member of Vision Committee of World Wireless Research Forum(WWRF), he was vice chair of WWRF in 2005. He is also invited as the consultants for many domestic and oversea communication companies. He is very active on the international research activity on Beyond 3G area. He also participated in several European projects such as E2R and MOCCA. Until now, he has published 6 books, around 400 publications in journals and conferences in the area of telecommunications. His main research interests are theory and applications in wireless communication area. He was awarded by government, city of Beijing and Ministry of Information Industry several times for his great contribution to the industry and research activity in China.Hu Zheng is a PH.D candidate in mobile communications engineering in Wireless Technology Innovation Institute (WTI) at Beijing University of Posts and Telecommunications (BUPT). He received B.S degree from Nanjing University of Posts and Telecommunications in 2002, majoring in computer communications engineering. He currently works on serivce aspects of mobile ubiquitous communication system with focus on design and performance evaluation of interaction protocols and services in self-organized service environment.Wang Xu received the B.Tech. degree in electronic engineering from Beijing Polytechnic University (now named as Beijing University of Technology), Beijing, China, in 2002. Now he is working for his Ph.D. degree in Wireless Technology Innovation (WTI) Institute, Beijing University of Posts and Telecommunications (BUPT). His current interests include wireless communications in personal area, ad hoc networks and peer-to-peer system.Li Yinong received the BS degree major in Telecommunication Engineering in 1993 from Beijing University of Posts and Telecommunications, the MS degree and PhD degree major in Telecommunication and Electronic System in 1995 and 2003 from the Beijing University of Posts and Telecommunications. He is currently a lecture of STE (School of Telecommunication Engineering) of BUPT. His main research interests include service modeling, service composition approach, and intelligent service. In BUPT, he has given several lectures to both graduate and undergraduate students such as Information Theory, Speech Recognition, Pattern Recognition and Artificial Intelligence.     

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.     

High Speed Curve Interpolating D/A Converter

This paper presents a design of high speed curve interpolating D/A converter. We improve 8-bit data to 12-bit data, so the data resolution increases 16 times than that of original 8-bit data. The curve interpolator is developed from the linear interpolator. The simulation speed curve interpolator is about 500 MHz. The chip is fabricated by 0.8 m double-metal single poly CMOS technology. The active interpolation size of chip is 1 × 1 mm². The power dissipation is 200 mWatts at 5volt and 500 MHz for simulation result and 80 mWatts at 5 volt and 50 MHz for measurement result. The errors of interpolating result of curve interpolators are about 20 times less than that of original signal.     

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.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Memory Performance Optimizations For Real-Time Software HDTV Decoding

Pure software HDTV video decoding is still a challenging task on entry-level to mid-range desktop and notebook PCs, even with today’s microprocessors frequency measured in GHz. This paper shows that the performance bottleneck in a software MPEG-2 decoder has been shifted to memory operations, as microprocessor technologies including multimedia instruction extensions have been improving at a fast rate during the past years.Our study exploits concurrencies at macroblock level to alleviate the performance bottleneck in a software MPEG-2 decoder. First, the paper introduces an interleaved block-order data layout to improve CPU cache performance. Second, the paper describes an algorithm to explicitly prefetch macroblocks for motion compensation. Finally, the paper presents an algorithm to schedule interleaved decoding and output at macroblock level. Our implementation and experiments show that these methods can effectively hide the latency of memory and frame buffer. The optimizations improve the performance of a multimedia-instruction-optimized software MPEG-2 decoder by a factor of about two. On a PC with a 933 MHz Pentium III CPU, the decoder can decode and display 1280 × 720-resolution HDTV streams at over 62 frames per second.This work was done while the author was a Ph.D. candidate in the Computer ScienceHan Chen is a research staff member in IBM T.J. Watson Research Center. His research interests include distributed computing systems, scalable display system, and multimedia. He received his Ph.D. degree in 2003 and his M.A. degree in 1999 from Princeton University. He received his B.S. degree from Tsinghua University of Beijing, China in 1997.Kai Li is a Charles Fitzmorris professor at the Computer Science Department of Princeton University. His research interests include operating systems, computer architecture, distributed systems, and scalable display systems. He received his Ph.D. degree from Yale University in 1986. Prior to that, he received his M.S. degree from University of Science and Technology of China, Academy of Sciences of China in 1981 and a B.S. degree from Jilin University in China in 1977. He was a visiting faculty member at University of Toronto in 1988 and a visiting professor at Stanford University during his sabbaticals in 1996 and 2000. He has served on dozens of program committees and served as chair or vice chair several times. He has been elected as an ACM fellow in 1998.Bin Wei received a Ph.D. in Computer Science from Princeton University in 1998 and joined the research community at AT&T Shannon Laboratories since then. His research interests are in the areas of high-performance computer systems, multimedia, and service platforms for mobile users. He received a BS in Computer Science from Tianjin University, China in 1983 and an MS in Computer Science from the Institute of Computing Technology, Chinese Academy of Sciences, in 1989.     

Status and Trends in Advanced SOI Devices and Materials

提供了一种用于安德鲁反射测量样品制备新方法. 该方法采用聚焦粒子束刻蚀和磁控溅射,可以获得可控的、干净的、无应力的纳米接触用于自旋极化探测. 所制备的样品中,磁性和非磁性材料样品的反射谱都表现出复杂的峰和谷结构,这些结构可能源于与界面相关的零偏压反常以及与激发态相关的准离子相互作用. 对另一个Co40Fe40B20合金样品采用简单的钕针尖压针方法进行了对比性测量,反射谱中没有观察到谷结构,但谱结构出现较明显的热扩展,这种热扩展可能来源于界面处的非弹性输运. 所有的反射谱目前还不能由现有的理论给出令人满意的解释. 利用点接触反射方法获得可靠的自旋极化信息还有赖于接触界面特征的进一步分析. 而一个更切合实际的、更完善的理论成为迫切的需要.