微机械惯性器件

微电子加工技术和振动惯性技术相结合使惯性仪表技术发生了重大变革，惯性器件的概念已从宏观领域发展到微观世界，人们已能象生产集成电路那样来生产惯性器件，这类惯性器件被称为微机械惯性器件。文章叙述了微机械惯性器件的发展状况、技术趋势及市场预测。     

用于光电子器件封装的耦合对准技术

在光电子器件封装工艺中，光器件的对准是个关键问题，它直接关系到光电子器件的性能和实用化。本叙述了光电子器件封装中的有源对准技术、无源对准技术、自对准技术和自动化的对准封装技术。     

用显微红外热成像技术分析功率器件可靠性

利用显微红外热成像技术对功率器件进行热可靠性分析。先从理论上阐述了显微红外热成像技术的原理,进而尝试利用该技术进行微波功率器件可靠性筛选工作,通过分析获取了显微红外图像中的温度分布和峰值温度,大大提高了器件可靠性筛选工作的准确性。在功率器件失效分析方面,利用显微红外热成像技术对发生失效的器件进行热成像和分析,通过定位失效点找到器件发生失效的原因。另外,还利用该技术来验证器件热设计的成功与否,通过显微红外热成像获取的温度信息如峰值温度、温度分布等来判断器件的热设计是否符合要求,在实际的器件设计过程中起到了良好的效果。     

微电子器件的抗辐射加固和高可靠技术

介绍了微电子器件的辐射效应和器件制作材料、电路设计、器件结构、制作工艺、元件之间的隔离、预辐射等加固技术，及微电子器件加固水平；并扼要介绍了微电子器件的耐高温和耐冲击与振动等高可靠技术。     

无线通信领域MEMS器件的研究进展

无线通信技术的发展对系统小型化提出了要求,用IC技术制造的电路无源器件的性能无法满足要求,利用MEMS技术不仅能将器件小型化,与,电路集成实现单片化,并且器件性能也能达到要求。近年来,用MEMS技术制作电容、电感、开关以及谐振器等无源器件成为MEMS的又一个新的研究领域。文章简单介绍了无线通信领域MEMS器件的研究进展。     

数字信息时代的显示器件

本文简要介绍了目前显示器件的技术发展特点。随着数字信息技术的迅速发展，显示器件已经呈现出向越来越小和越来越大的两个不同应用方向。因此，无论是适用于手机和PDA的小型显示器件，还是适用于壁挂影视图像的大型显示器件，都对当今的电子显示器件提出不同的技术要求。本文通过对技术特征的分析和比较，探讨了显示器件的未来发展趋势。     

功率VDMOS器件抗SEB/SEGR技术研究进展

针对功率VDMOS器件抗单粒子辐射加固技术在空间辐射环境下的要求,从重粒子对VDMOS器件的辐射机理及作用过程出发,归纳出功率VDMOS器件抗单粒子辐射加固的三类技术:屏蔽技术、复合技术和增强技术。综述了国内外功率VDMOS器件这三类抗单粒子辐射加固技术的研究进展,为半导体器件抗单粒子辐射加固技术研究提供了参考。     

基于非平衡模式的碲镉汞高工作温度探测器

本文回顾了当前国内外高工作温度碲镉汞红外探测器的技术路线和相应的器件性能,在碲镉汞器件暗电流的温度特性分析的基础上,讨论了基于非平衡工作模式的碲镉汞探测器的基本原理、器件结构设计和暗电流机制,探讨了吸收层全耗尽碲镉汞器件性能与器件结构参数、材料晶体质量的关系,明确了其技术要点和难点,展望了碲镉汞高工作温度器件技术的发展趋势。     

微细加工技术在有机电致发光器件中的应用

有机电致发光器件是近年来出现的一种新型显示技术。为了实现高分辨率及改善器件的发光性能，多种传统的及新兴的微细加工技术已被应用到该技术中，而且针对该技术还发展了阴极隔离柱等新技术。总结了应用于有机电致发光器件的几种典型微细加工技术，并介绍了它们各自的特点及其在发光器件中的具体应用。     

碲镉汞高工作温度红外探测器

基于当前红外探测器技术的发展方向,从高工作温度红外探测器应用需求的角度分析了碲镉汞高工作温度红外探测器在组件重量、外形尺寸、功耗、环境适应性及可靠性方面的优势。总结了欧美等发达国家在碲镉汞高工作温度红外探测器研究方面的技术路线及研究现状。从器件暗电流和噪声机制的角度分析了碲镉汞光电器件在不同工作温度下的暗电流和噪声变化情况及其对器件性能的影响;总结了包括基于工艺优化的Hg空位p型n-on-p结构碲镉汞器件、基于In掺杂p-on-n结构和Au掺杂n-on-p结构的非本征掺杂碲镉汞高工作温度器件、基于nBn势垒阻挡结构的碲镉汞高工作温度器件及基于吸收层热激发载流子俄歇抑制的非平衡模式碲镉汞高工作温度器件在内的不同技术路线碲镉汞高工作温度器件的基本原理,对比分析了不同技术路线碲镉汞高工作温度器件的性能及探测器制备的技术难点。在综合分析不同技术路线高温器件性能与技术实现难度的基础上展望了碲镉汞高工作温度器件技术未来的发展方向,认为基于低浓度掺杂吸收层的全耗尽结构器件具备更好的发展潜力。     

培养细胞中病毒共感染的形态学依据

本文综合报道根据电镜下病毒的形态学和形态发生学的特征,从134份普通感冒和2份SARS患者鼻腔分泌物或咽拭子分离病毒阳性或可疑阳性的体外细胞培养物中发现有9份是两种病毒的共感染。它们是：腺病毒与副粘病毒共感染2份;疱疹病毒与副粘病毒共感染2份;鼻病毒与冠状病毒共感染1份;鼻病毒与正粘病毒共感染1份;鼻病毒与副粘病毒共感染1份以及冠状病毒与呼肠病毒共感染2份。十分罕见的是,在两份冠状病毒的感染细胞内分别观察到与鼻病毒和呼肠病毒的共感染,在感染细胞内和/或细胞外两种病毒的成熟病毒粒子均较多,而且在细胞浆内相互紧密接触。提出,在病毒共感染的培养细胞内,病毒在复制和组装的过程中各自病毒的基因和毒力是否会发生变异均值得病毒学工作者深入研究。     

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.     

高速光纤综合通信网络平台研究

现代通信网络应能满足各种通信业务和通信容量日益发展的需求,实现话音、数据、视频、IP等业务的一体化综合交换和传输。在比较TDM、IP和ATM三种协议的基础上,提出"采用内置RPR和MPLS功能的MSTP平台"建设光纤综合通信网络平台的实现方法。MSTP采用SDH的数据帧结构,保持了SDH标准光接口、灵活分插低速信号、自愈环保护和功能强大的网管等优点,可对TDM、IP和ATM协议进行优化传输。     

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.     

开放和分解OTN网络技术研究和分析

如何构建开放和分解的OTN网络,以实现跨厂家设备的混合组网和光层互连,一直是运营商和设备商追求的目标,ONF和LFN这两大开源项目组织分别基于各自的SDN控制平台——ONOS和OpenDayLight,给出了自己的解决方案——ODTN+TAPI和OpenROADM+TPCE,本文对这两种技术方案作了深入的研究和分析,比较了这两种技术的异同点,并对当前这两种技术的发展和应用前景作了简要的说明。     

带SIR结构新型多枝节加载双频滤波器

本文在传统λ/4阶梯阻抗谐振器的基础上,提出了一种新型的宽带双频滤波器改进设计方案。改进的滤波器增加了传输零点,此传输零点能有效的改进通带的选择性和阻带特性,且上阻带带宽很宽。结构简单,在传统类似滤波器同谐振频率基础上有效缩小了尺寸,并且设计的滤波器通带的中心频率和带宽是完全独立可控,方便我们应用到实际。工作在4.1 GHz和6 GHz两个频段,3 dB相对带宽分别为7.2%和2.2%,实测和仿真吻合良好。     

Data Integration for Medical Information Management

We present a new method for data integration and security by mixing medical waveforms and images with encrypted patient identifiers and unencrypted ancillary information, such as acquisition parameters, diagnostic comments and notes in textual, pictorial, and voice forms. We vary the sampling rate according to the instantaneous frequency of the signal. Redundant samples (or pixels) are eliminated and replaced by associative data which are labeled using a status string encoded based on the Huffman and run-length techniques. This method achieves both data compression and integration simultaneously, allows synchronized presentation of information from different sources by using multimedia technology, and provides data security features. Mingui Sun received a B.S. degree from the Shenyang Chemical Engineering Institute, China, in 1982, and M.S. and Ph. D. degrees in Electrical Engineering from the University of Pittsburgh in 1986 and 1989, respectively. He was a Graduate Student Researcher from 1985 to 1989 working on signal and image processing projects. Currently, he is a Associate Professor and an Associate Director of the Center for Clinical Neurophysiology in the Department of Neurosurgery at the University of Pittsburgh, and a Director of Research at Computational Diagnostics, Inc. His current research and development interests include advanced biomedical electronic devices, biomedical signal and image processing, sensors and transducers, biomedical instruments, artificial neural networks, wavelet transforms, time-frequency analysis, and the inverse problem of neurophysiological signals. He has over 160 publications in these areas. Qiang Liu received his B.S. and M.S. degrees in electrical engineering from Xidian University, Xian, China, in 1996 and 1999 respectively. He is currently a Ph.D. student at the University of Pittsburgh, Pittsburgh, USA. His further research interests include biomedical signal processing, medical imaging, and image/video segmentation, coding and transmission. Robert J. Sclabassi received the B.S.E. degree from Loyola University, Los Angeles, the M.S.E.E., Engineer in Electrical Engineering, and Ph.D. degrees in electrical engineering from the University of Southern California, and the M.D. degree from the University of Pittsburgh. He was employed in the Advanced Systems Laboratory at TRW, Los Angeles, and was a postdoctoral fellow at the Brain Research Institute at the University of California, Los Angeles. He was on the faculties of Department of Neurology and Biomathematics at UCLA until he joined the University of Pittsburgh. Dr. Sclabassi is currently a Professor of Neurological Surgery, Psychiatry, Electrical Engineering, Mechanical Engineering, Psychiatry, and Behavioral Neuroscience at the University of Pittsburgh. Dr. Sclabassi has published over 400 papers, chapters and conference proceedings. Dr. Sclabassi is a Registered Professional Engineer.     

RTIDDS在业务管理与资源优化系统中的拓展应用

RTI DDS是位于网络协议栈最上层的软件,它屏蔽底层网络代码,代之以通用的、基于标准的应用程序接口(API),规定了实时分布式系统中数据发布、传递和接收的接口和行为,通过API提供易于理解的基于发布/订阅的通讯模式。业务管理与资源优化是战术网络中用于对网络业务管理和网络资源优化的本地服务软件,利用DDS的总线服务功能,能够快速有效地将业务管理与资源优化前端同步拓展到多个使用平台上。     

Rural broadband: Gaps,maps and challenges

This paper examines challenges to evidence-based decision-making in the design and implementation of rural broadband investment programs. Our focus is on Canada, and the apparent need for further intra-rural broadband research and better data and mapping for informing public investment decisions, but similar challenges are evident in the international literature. Based on proprietary telecommunication provider datasets, the Canadian Radio-television and Telecommunication Commission (CRTC) estimates that broadband services with advertised speeds that meet its basic universal service targets (50 Mbps download and 10 Mbps upload) are available to 87.4 percent of households in Canada. In rural areas however, services that meet CRTC’s speed targets are available to 45.6 percent of households. Moreover, effective speeds and service quality levels that suppliers deliver and users experience tend to fall well below the government’s aspirational targets. In response to demand for better broadband, a variety of initiatives are directing public investment to the deployment of regional and rural broadband networks, which are typically owned and operated by private companies. There remains a serious lack of relevant data and its effective use in creating rural broadband strategies and managing public investment projects. Evidence from the literature suggest that this affects the degree and quality of geo-spatial and econometric analysis that results in a limited empirical basis to allocate scarce public investments, aggregate demand of consumers/communities, and assess the outcomes of rural broadband initiatives ex post. This paper provides a historical overview of rural broadband development in Canada and questions if the body of knowledge to inform public investment initiatives has grown sufficiently to ensure their effectiveness and sustainability. With a regional case from southwestern Ontario, Canada, we discuss the findings of the literature review, characterize the broadband data challenge, and discuss the importance of proprietary provider data cross-referenced with Internet user experience data.     

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.