奥运通信高峰论坛在京举行

2008年北京奥运会的成功申办实现了国人的百年梦想。中国政府和北京奥组委也庄严向全世界作出承诺:将2008年北京奥运会举办成奥运史最好的一届奥运会,并提出"绿色奥运、科技奥运、人文奥运"的口号。作为科技奥运的核心组     

奥运概念点亮通信展

奥运会将激发通信业全方位的想象力和热情,想必2008年奥运会将通过更多的通信业务带给人们前所未有的使用体验。奥运是本届中国国际通信展的主题词之一,也许,展会上随处可见的奥运标志以及奥运福娃就是这个主题的最好佐证。同时,2008年奥运会合作伙伴中国网通喊出"2008,我们准备好了"的参展口号,奥运合作伙伴中国移动则重点推出"科技奥运、自在移动"、"无线奥运"等主题演示和体验活动,各参展厂商都不同程度地推出了奥运主题的相关产品,让人们提前对北京"科技奥运"充满期待。     

绿色奥运:在信息技术中绽放

刚刚圆满闭幕的2008年北京奥运会是一届充满科技色彩、人文韵味和可持续发展理念的奥运会,在北京奥运会“绿色奥运、科技奥运、人文奥运”三大理念中,绿色奥运中体现着人文奥运、科技奥运的思想,人文奥运需要绿色奥运做基础、科技奥运做支持,科技奥运帮助人文奥运、绿色奥运的实现。回顾本届奥运会中应用的丰富多彩的信息通信技术,我们从”绿色奥运、科技奥运、人文奥运”三大理念来看,北京奥运会不愧为信息技术应用的集大威者。     

奥运电视转播发展历程及技术发展现状(下)

(接上期第48页) 4"科技奥运"理念与奥运电视转播技术发展 "科技奥运"是北京奥运会的三大理念之一,即"以科技助奥运,以奥运促科技".     

践行奥运承诺"三部曲"——中国移动北京公司服务奥运创新纪实

2007年4月28日,中国移动通信集团公司在由北京奥组办中场开发部主办、中国移动承办的第十二次北京2008年奥运会合作伙伴俱乐部活动中宣布了其奥运承诺,并以"科技奥运、自在移动"为主题发布了准备服务于北京奥运的产品计划.中国移动郑重承诺:为本届奥运会提供"最先进的技术、最丰富的业务和最周到的服务",为奥运通信保驾护航,通过移动终端特有优势和功能支持"绿色奥运"、"人文奥运",凸显"科技奥运"亮点.     

关键词四:奥运通信

推荐理由:通信已经成为奥运会不可分割的一部分,奥运会需要完备的通信保障。2008北京奥运通信是为实现科技奥运提供强有力的支撑和奥运会的通信保障。经过多年的建设,用于奥运通信的基础网络已经建设完成,对于     

奥运通信

推荐理由:通信已成为奥运会不可分割的一部分,奥运会需要完备的通信保障.2008北京奥运通信是为实现科技奥运提供强有力的支撑和奥运会的通信保障.     

中国移动全新数据业务应用于奥运开幕式

中国移动作为2008北京奥运会合作伙伴,秉承"科技奥运"的理念,为这次盛会提供了奥运历史上最丰富的移动数据业务。8月8日晚上举行的北京奥运会开幕式上,即拍即     

大唐电信集团圆满完成奥运通信保障任务

北京奥运会的召开令世人瞩目.在迎接奥运、服务奥运的过程中,大唐电信集团数十家所属单位充分发挥各自优势,承担了为北京奥运提供通信设备、技术支撑和服务保障等任务.大唐电信集团立足自主核心技术,携手各大通信运营商,以"国家队"的责任感,为"科技奥运"提供了强有力的支持,圆满地完成了北京奥运会的通信保障任务,第三代移动通信TD-SCDMA精品网络、SCDMA无线接入、微电子领域的核心技术等,完美彰显了科技奥运的风采.     

解读数字奥运

2001年7月13日,是一个让所有炎黄子刻骨铭心的日子.这一天,中国北京以56票在5个申办城市中脱颖而出,赢得了2008年第29届夏季奥运会的主办权.八年的艰苦申奥之旅就此画上了圆满的句号,中华民族的奥运史掀开了崭新的一页.从这一刻起,承载着所有华人奥运梦想与希望的北京走上了新的征程,开始履行她对世界的庄严承诺:2008年的北京奥运会,将是一个"绿色奥运、科技奥运、人文奥运"的体育盛会;2008年的北京奥运会,将是历史上规模最大的、科技水平最高的、影响最广泛的、最出色的一届奥运会.     

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.     

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.     

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.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.