白色iPhone4在中美等28国上市

千呼万唤始出来的白色版iPhone 4终于跟用户见面了,一再延迟上市时间的iPhone 4白色版已在中国、英国、美国等28个国家和地区上市. 这28个国家和地区分别为奥地利、澳大利亚、比利时、加拿大、中国、捷克共和国、丹麦、芬兰、法国、德国、中国香港、爱尔兰、意大利、日本、卢森堡、中国澳门、荷兰、新西兰、挪威、新加坡、韩国、西班牙、瑞士、瑞典、中国台湾、泰国、英国和美国.     

本刊来稿须知

1．本刊设有专题论坛、专业改革、教学改革、科研报告、通讯动态、电子信息、电子科学、电气工程、自动控制、科技应用、课程改革、教学研究、教材建设、实践教学、教学方法、研究生教学、毕业设计、机辅教学、争鸣论坛、高职教育、教学仪器及电坛人物等栏目。     

3D电视试验频道已在全国26省区市开通

截至2012年2月8日,《中国3D电视试验频道》开通地区分别为:吉林、山东、青海、宁夏、内蒙古、江苏、湖南、浙江、广东、广西、新疆、河北、陕西等22省、自治区的部分城市,以及北京、天津、上海、重庆、合肥、六安、厦门、武汉、太原、运城、铁岭     

第27届华东电视技术年会暨第8届华协体发展峰会圆满召开

2014年6月11日-14日，华东电视行业的年度盛会--第27届华东电视技术年会暨第8届华协体发展峰会在上海隆重召开。来自上海、浙江、江西、江苏、安徽、山东、福建、杭州、济南、厦门、青岛、宁波、南京等13家电视台，索尼、松下、索贝、大洋、新奥特、哈里斯、安恒利、安达斯、文广科技、STR、北京星光、捷成世纪、华创、风格等14家厂商的代表参加了本次年会。     

CMMB网络覆盖工程在全国范围内展开

随着北京奥运会的日益临近,我国移动多媒体广播项目CMMB网络覆盖工程正在全国各主要城市紧锣密鼓地展开。截至到4月30日,CMMB已经完成北京、上海、天津、沈阳、青岛、秦皇岛等六个奥运城市和广州、深圳、西安、成都、重庆、长沙、合肥、大连、厦门、福州、昆明、南京等城市的     

第24届华东电视技术年会暨第5届华协体发展峰会圆满召开

2011年6月6—10日,华东电视行业的年度盛会——“第二十四届华东电视技术年会暨第五届华协体发展峰会”在上海大宁福朋喜来登大酒店隆重召开。来自上海、浙江、江西、江苏、安徽、山东、福建、济南、厦门、青岛、宁波、南京、杭州等13家电视台,索尼、松下、索贝、大洋、新奥特、安达斯、安恒利、文广科技、STR、哈里斯、捷成世纪、...     

7大板块夺目软交会

移动OA、监控、家居娱乐、智能医疗、导航与智能车载、云平台上的个人/商务应用、物联网案例,成为本届软交会展览区的最醒目内容。在本届软交会的展览区,英特尔、微软、SAP、IBM、思科、简柏特、甲骨文、HP、花旗数据、NEC、川崎重工、松下、SONY、亚美亚等著名跨国企业汇聚在"IT跨国公司长廊",英特尔和微软展区以导航、医疗、娱乐等各类互动式业务吸引了大批参展者。     

第十一届全国分子束外延学术会议征文通知(第一轮)

正会议时间:2015年8月会议地点:成都(初定)主办单位:中国有色金属学会半导体材料学术委员会、中国电子学会电子材料分会承办单位:中国科学院红外成像材料与器件重点实验室、中国科学院上海技术物理研究所会议主席:何力,会议副主席:齐鸣、曾一平、陈弘、蒋最敏顾问委员会(以姓氏笔划为序):孔梅影、王迅、王曦、王占国、王启明、王康隆、任迪远、孙祥祯、李树深、李爱珍、何杰、杜武青、张翔九、陆卫、陈良惠、杨辉、杨克武、杨国祯、卓以和、郑厚植、周均铭、赵连城、封松林、高涛、谢琪、薛其坤     

第二十一届华东电视技术年会暨第二届华协体发展峰会成功召开

2008年6月12～13日,华东电视行业的年度盛会,“第二十一届华东电视技术年会暨第二届华协体发展峰会“在上海复旦皇冠大酒店隆重举行。来自上海、江西、江苏、安徽、山东、浙江、福建、济南、厦门、青岛、宁波、南京、杭州等13家电视台,索尼、松下、新奥特、大洋、索贝、哈里斯、安达斯、安恒利、文广科技、STR,捷成世纪、北京星光等12家厂商的代表参加了年会。     

中国高等学校电子教育学会第26届学术年会会议纪要

中国高等学校电子教育学会第26届学术年会,于2011年8月5日至8日在贵州安顺学院召开。参加会议的有：湖南科技大学、延安大学、中南民族大学、西华大学、青海师范大学、温州大学、广东外语外贸大学、遵义师范学院、楚雄师范学院、咸阳师范学院、长江师范学院、陇东学院、河北北方学院、邢台学院、韶关学院、湖南人文科技学院、宿州学院、     

Alternative Schemes for Dynamic Secure VPN Deployment in UMTS

Three alternative schemes for secure Virtual Private Network (VPN) deployment over the Universal Mobile Telecommunication System (UMTS) are proposed and analyzed. The proposed schemes enable a mobile node to voluntarily establish an IPsec-based secure channel to a private network. The alternative schemes differ in the location where the IPsec functionality is placed within the UMTS network architecture (mobile node, access network, and UMTS network border), depending on the employed security model, and whether data in transit are ever in clear-text, or available to be tapped by outsiders. The provided levels of privacy in the deployed VPN schemes, as well as the employed authentication models are examined. An analysis in terms of cost, complexity, and performance overhead that each method imposes to the underlying network architecture, as well as to the mobile devices is presented. The level of system reliability and scalability in granting security services is presented. The VPN management, usability, and trusted relations, as well as their behavior when a mobile user moves are analyzed. The use of special applications that require access to encapsulated data traffic is explored. Finally, an overall comparison of the proposed schemes from the security and operation point of view summarizes their relative performance. Christos Xenakis received his B.Sc. degree in computer science in 1993 and his M.Sc. degree in telecommunication and computer networks in 1996, both from the Department of Informatics and Telecommunications, University of Athens, Greece. In 2004 he received his Ph.D. from the University of Athens (Department of Informatics and Telecommunications). From 1998–2000 was with the Greek telecoms system development firm Teletel S.A., where was involved in the design and development of advanced telecommunications subsystems for ISDN, ATM, GSM, and GPRS. Since 1996 he has been a member of the Communication Networks Laboratory of the University of Athens. He has participated in numerous projects realized in the context of EU Programs (ACTS, ESPRIT, IST). His research interests are in the field of mobile/wireless networks, security and distributed network management. He is the author of over 15 papers in the above areas. Lazaros Merakos received the Diploma in electrical and mechanical engineering from the National Technical University of Athens, Greece, in 1978, and the M.S. and Ph.D. degrees in electrical engineering from the State University of New York, Buffalo, in 1981 and 1984, respectively. From 1983 to 1986, he was on the faculty of Electrical Engineering and Computer Science at the University of Connecticut, Storrs. From 1986 to 1994 he was on the faculty of the Electrical and Computer Engineering Department at Northeastern University, Boston, MA. During the period 1993–1994 he served as Director of the Communications and Digital Processing Research Center at Northeastern University. During the summers of 1990 and 1991, he was a Visiting Scientist at the IBM T. J. Watson Research Center, Yorktown Heights, NY. In 1994, he joined the faculty of the University of Athens, Athens, Greece, where he is presently a Professor in the Department of Informatics and Telecommunications, and Director of the Communication Networks Laboratory (UoA-CNL) and the Networks Operations and Management Center. His research interests are in the design and performance analysis of broadband networks, and wireless/mobile communication systems and services. He has authored more than 150 papers in the above areas. Since 1995, he is leading the research activities of UoA-CNL in the area of mobile communications, in the framework of the Advanced Communication Technologies & Services (ACTS) and Information Society Technologies (IST) programmes funded by the European Union (projects RAINBOW, Magic WAND, WINE, MOBIVAS, POLOS, ANWIRE). He is chairman of the board of the Greek Universities Network, the Greek Schools Network, and member of the board of the Greek Research Network. In 1994, he received the Guanella Award for the Best Paper presented at the International Zurich Seminar on Mobile Communications.     

企业VPN技术应用实施浅析

随着企业规模逐渐扩大,远程用户、分支机构、合作伙伴也在不断增多,关键业务的需求增加,出现了一种通过公共网络（如Internet）来建立自己的专用网络的技术,这种技术就是虚拟专用网（简称VPN）。本文首先介绍了VPN的概念,对VPN的实现技术进行了分类和适用性分析,然后分析了各种类型的企业在信息安全方面的需求和限制,根据不同企业的特点提出了不同的VPN解决方案,最后,对VPN在集成电路企业中的应用做了简单的拓朴展示。     

RFID相关技术专利分析(三)

RFID技术作为一项重要的非接触式识别枝术,近来发展迅猛。本文对RFID天线相关的技术进行了专利战略分析,主要包括:RFID天线相关整体行业分析、RFID标签天线和制造工艺等三个方面,分析了如下主要指标:申请年度发展趋势、主要申请人地区分布、IPC分布、DWPI分布、主要申请人分布、核心专利排名、专利地图。根据分析结果,本文给出了分析结论,对相关企业在专利利用、保护和管理方面给出了建议与对策。     

LFM雷达对高超声速目标的数据关联研究

基于统计判决的关联决策是当前多雷达数据关联的一个有效途径.然而,在采用该方法对高超声速目标数据关联的问题进行研究时,却会出现随着雷达测量精度的提高,不同雷达数据关联的正确关联概率反而下降这一现象.针对这一情况,首先,利用线性调频（linear frequency modulated,LFM）雷达合理构建了基于统计判决的高超声速目标数据关联模型;接着,在现有的统计判决机制下,进一步分析了目标高超声速运动对多LFM雷达数据关联的影响,并得出了其关联判决函数（服从非中心卡方分布）与现有的关联判决门限（服从卡方分布）相矛盾的结论;最后,结合统计学的原理,通过对目标非中心统计参量的有效求解,合理解释了上述奇怪现象的出现.仿真结果表明,在目标高超声速运动的条件下,上述奇怪现象的出现是合理的.     

接入控制器安全网络管理系统的设计与实现

在讨论了接入控制器(AC)网络管理系统安全重要性的基础上,分析了SNMP协议的应用,包括对其3个版本SNMPv1、SNMPv2及SNMPv3的优缺点的对比,并解释了该设备网络管理系统采用SNMPv3版本的原因.详细介绍了AC所实现的管理信息库的内容,包括RFC1213协议、IEEE 802.1x协议、RMON协议、Web DHCP、EAP_OTP、EAP_MD5、EAP_TLS、EAP_SIM等多种认证协议以及网络管理系统的五大功能.最后阐述了AC安全网络管理系统结构的设计与实现.     

雷达探鸟技术发展与应用综述

探鸟雷达已成为机场鸟击防范、风力发电场鸟击风险评估、鸟类自然保护区鸟情观测与科学研究的重要工具。文中首先论述了探鸟雷达的主要组成部分。然后,分析了地面杂波、空域杂波和其他无关目标对探鸟雷达探测效果的影响,进而介绍了传统的杂波抑制方法和相参雷达杂波抑制技术,以及先进的探鸟雷达采用的目标检测、目标跟踪、目标显示、数据记录和雷达组网等数据处理技术。接着,给出了当前的探鸟雷达能够获取的目标轨迹、回波大小、回波强度、信号波动、飞行速度、飞行高度等反映飞鸟目标特性的主要指标。最后,描述了国内外四种典型雷达探鸟系统,并针对雷达探鸟技术的未来发展提出了一些思考及可行性建议。     

SOI Technologies Overview for Low-Power Low-Voltage Radio-Frequency Applications

Thanks to their structure, the SOI technologies present several intrinsic advantages for analog and RF applications. Indeed, as it is well established now, these technologies allow the reduction of the power consumption at a given operating frequency. Moreover, the high-insulating properties of SOI substrates, in particular when high resistivity substrate is used, make that these technologies are perfect candidates for mixed-signal applications. In the present paper, we will discuss the performances of the SOI technologies in radio-frequency range. First of all, the high-frequency behavior of SOI substrates, thanks to the characterization of transmission lines, will be shown. The impact of the SOI substrate resistivity on the performances of passive components will also be analyzed. Then, an overview of RF performances of SOI MOSFETs for two different architectures, fully- and partially-depleted, will be achieved and compared to the bulk ones. Finally, the influence of some specific parasitic effects, such as the kink effect, the self-heating effect and the kink-related excess noise, on the RF performances of SOI devices will be studied, thanks to a specific high-frequency characterization.     

A Novel Local-Dielectric-Thickening Technique for Performance Improvements of Spiral Inductors on Si Substrates

A novel local-dielectric-thickening technique is presented for performance improvements of Si-based spiral inductors.This technique employs the processes of deposition,photolithography,and wet-etching,to locally thicken the oxide layer under the inductor,which can decrease the substrate loss and improve the inductor performance.Both the structures and processes are compact,economical,and compatible with CMOS processing.Several square spiral inductors with different inductances are fabricated,and the quality factors and the self-resonant frequencies both increase clearly with this proposed technique:for the 10,5，and 2nH inductors,the peak quality factors are effectively improved by 46.7%,49.7%，and 686%,respectively;however,the improvement percents of the selfresonant frequencies are more significant,which are 92.1%,91.0%,and no less than 68.1%，respectively.     

机动6m抛物面天线车结构总体方案探讨

文章遵循策划、分解、综合及优化的总体方案研究思路,根据要求,提出了三个机动6 m抛物面天线车结构总体备选方案;针对系统结构组成,详细分析了天馈线、天线座、拖车以及系统标定等子系统所有可能的结构方案;最后综合权衡研究三个备选方案在技术、质量、成本、周期等多方面的优劣,选择了最佳结构总体方案,确保了所选方案具有合理性、可行性、经济性、先进性和科学性。实践证明,所选方案用户满意,实施效果良好。     

SISA安全集成服务架构

随着信息价值的不断提升,安全事件层出不穷。传统的基于协议分析、检测响应技术为主体的安防技术体系已明显不能独立支撑信息安全的大厦。文中通过融合检测响应及密码基础设施,面向服务,面向治理提出新一代的安全集成服务架构。通过该架构,融合网络检测响应设施与密码基础设施,融合技术与管理,从而充分保障信息安全保密性、完整性、可用性、可控性、可审计的要求,为纷繁复杂的数字世界提供更为全面和有力的安全保障。