阿尔及利亚引领阿拉伯地区WiMAX业务应用

WiMAX现在在阿尔及利亚已实现商用，成为阿拉伯的先锋。一些阿拉伯国家已开始试验这一业务。有报告显示，18个阿拉伯国家制定了对WiMAX的管制、频率的使用、试验和业务预研究、设备制造商的选择。这些国家是阿尔及利亚、巴林、埃及、伊拉克、约旦、科威特、黎巴嫩、利比亚、摩洛哥、阿曼、巴勒斯坦、卡塔尔、沙特、苏丹、叙利亚、突尼斯、阿联酋及也门。     

会展预报

一 ： ＿。。＿。＿‘＿＿。‘．＿＿．－入家用电器：空调、微波灶、照明器材、小家电。 ＠叭新回电子产晶暨挖未博监会二二：、xl二二丁工丁：二二丫（一 。、、。、．I。u。。。·，、；，。、3．通讯设备硝线、无线、移动及卫星通讯。 伴随着我国经济发展战略重点的西移和石油开发，边境贸易、基屯家用电脑：＊C机、笔记本电脑。 本建设等各项事业的飞速发展，新疆已成力一个极富潜力的电干信已其它：自控设备、娱乐电器、电子医疗器械、电热设备等各忡二 』色产品的广阔市场。正值年末市场旺季，广泛的宣传和周…     

融合——信息通信业发展的主旋律

融合的大视野——电信的观点 从电信的观点来看．融合有五个层面。第一个层面是各种技术层面上的融合,涉及各种有线无线技术、架构、协议、接口、硬件、软件、中间件、机架结构等。第二个层面：电信网自身各个层面的融合。水平来看有核心网、城域网、接入网、驻地网。垂直来看有传送网、承载网、业务网、支撑网。第三个层面是移动与固网的融合（分为4个阶段）。     

瞄准“打得赢”苦练“千里眼”铸就“顺风耳”——解放军重庆通信学院学员参加综合演练纪实

硝烟弥漫，炮声隆隆。重庆通信学院着眼培养打得赢信息战的高素质新型军事通信人才，组织全员额、全装备、全要素、全天候、全过程、高强度演练。提高了“通、抗、修、管、走、吃、住、藏”的作战本领。实战背景下。学员同“敌军”斗智斗勇。抗干扰、防偷袭、战风雨，保持通信指挥畅通，书写了一份优秀答卷。     

征稿通知

《电子器件》创刊于1978年,是由教育部主管、东南大学主办的学术性刊物。对国内外公开发行。并被美国(Ei)数据库、美国化学文摘(CA)和英国科学文摘(SA)收录。本刊主要刊登真空电子学、微波电子学、光电子学、薄膜电子学、电子显示技术、激光与红外技术、半导体物理与器件、集成电路与微电子技术、光纤技术、真空物理与技术、表面分析技术、传感技术、电子材料与元器件、电光源与照明技术、电子技术应用,并涉及电子科学领域内的新理论、新思想、新技术等方面的内容。欢迎有关科技人员和广大读者踊跃来稿。主要栏目有综述分析、科研报告、学术报告、科研通讯、应用研究、科技研究等。来稿要求和注意事项:一、来稿要求主题突出,论据充分,内容充实、新颖、创新、实用、言简意赅。图形清晰。字数6000字左右。二、标稿格式:①文标题(中、英文对照);②作者姓名(中文、汉语拼音对照);③作者单位(中、英文对照);④摘要(中文、英文对照100-150字)摘要需能反映文章主要内容,应能给读者关于文章内容足够的信息,它包括研究的目的、方法、结果、结论。而论文的标题、背景信息、作者过去的研究及将来的计划和相同的信息都不应在摘要中出现;⑤关键词(中、英文对照3—5...     

征稿通知

《电子器件》创刊于1978年,是由教育部主管、东南大学主办的学术性刊物。对国内外公开发行。并被美国(Ei)数据库、美国化学文摘(CA)和英国科学文摘(SA)收录。本刊主要刊登真空电子学、微波电子学、光电子学、薄膜电子学、电子显示技术、激光与红外技术、半导体物理与器件、集成电路与微电子技术、光纤技术、真空物理与技术、表面分析技术、传感技术、电子材料与元器件、电光源与照明技术、电子技术应用.并涉及电子科学领域内的新理论、新思想、新技术等方面的内容。欢迎有关科技人员和广大读者踊跃来稿。主要栏目有综述分析、科研报告、学术报告、科研通讯、应用研究、科技研究等。来稿要求和注意事项:一、来稿要求主题突出,论据充分,内容充实、新颖、创新、实用、言简意赅。图形清晰。字数6000字左右。二、标稿格式:①文标题(中、英文对照);②作者姓名(中文、汉语拼音对照);③作者单位(中、英文对照);④摘要(中文、英文对照100～150字)摘要需能反映文章主要内容,应能给读者关于文章内容足够的信息,它包括研究的目的、方法、结果、结论。而论文的标题、背景信息、作者过去的研究及将来的计划和相同的信息都不应在摘要中出现;⑤关键词(中、英文对照3-5...     

寻呼机和手机功能知多少

寻呼机的功能１、接收信息。包括接受个人服务信息和天气预报、股票证券、列车班次、体育赛事、新闻短讯、广而告之等公共信息。２、时钟功能。把手表的功能复制到寻呼机上。３、网上寻呼服务。网上传呼、Ｅｍａｉｌ到达通知等服务给广大上网者开辟了寻呼新天地,也为寻呼开辟了市场新天地。４、储存功能。储存记忆免去了携带电话簿的麻烦。５、锁定功能。对认定的具有特殊意义的信息进行锁定、保存,以便随时调阅查看。６、删除功能。可以随时删除各种多余信息。７、音乐选择。从７（４０种不同乐曲中选择自己爱好的音乐。８、震动功能。在众目睽睽的会议室及有关场所中,震动功能使机主免除尴尬和难堪。９、阅读提示。及时提醒机主阅读未及查看的信息。１０、接收终端。未来的寻呼机发展方向是集寻呼、商务通、电脑等各种功能于一体的个人接受终端,一个小小的寻呼机就是一个终端窗口。１１、自动关开机。象电视机定时自动开关机一样,寻呼机也可以定时自动开关机。１２、发送功能。随着双向寻呼的发展和推广,一种自身具有发送功能的寻呼机将受到市场的欢迎。１３、游戏功能。寻呼机本身带有若干游戏项目,闲暇之时可以消遣。１４、卡拉ＯＫ。在网络的支持下可以为被呼叫方送上一曲令人怦然心动的卡拉...     

本届《电信科学》编委会第二次会议在江苏瓜洲召开

本届《电信科学》编委会第二次会议1987年11月14日至16日在江苏瓜洲镇召开。会议由主任委员梁健主持。出席会议的编委还有陈太一、葛彦、冯重熙、毕厚杰、汤庭龙、邬贺铨、钟允若、赵宗基、钟义信、赵梓森、袁保宗、高星忠、雷震洲、樊昌信、陈芳烈等。李振邦、周万珍(代表顾冠群)和本刊编辑部的徐元勋、任洪美列席了会议。     

英语谚语的修辞手法及翻译

英语谚语是一个民俗的结晶,是文学宝库中不可或缺的部分。它句式灵活,拥有丰富的词汇和多样的修辞手法。它值得每个英语学者去研究。本文包括英语谚语的修辞手法和翻译两个部分。介绍了明喻、暗喻、借喻、拟人、拟物、重复、对比、夸张、双关、典故、对偶、矛盾修辞法、交错排列法和押韵十四种修辞方法。同时也阐述了英语谚语与汉语谚语的异同及英语谚语翻译的方法和误区。     

东芝CF9932型遥控器的维修

在现代家庭中,随着各种设备电器的添置,遥控器可有好几只。如音响中CD、VCD、DVD、AV功放、录像机、摄像机、空调、电视机等等。遥控器使用方便、自如,但也容易东抛西丢,疏于管理。如摔落地上、进入尘埃、纤维、受潮、电池液外溢、导电橡胶按键老化等等。造成多种多样的故障,影响使用。家电的遥控器虽然种类较多,但它们都有相同的工作原理和故障共性。现以东芝C3D9UXC背投彩电的CF9932型遥控器为例作一检修介绍。一、故障现象1.遥控器无反映,更换电池也无用。2.遥控距离缩短,有的漏电液。     

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