用于改善PtSi红外焦平面阵列器件响应特性的长焦距GaAs微透镜阵列器件的制作研究

提出了一种新的曲率补偿法用于长焦距微透镜阵列的制作.扫描电子显微镜(SEM)显示微透镜阵列为表面极为平缓的方底拱形阵列,表面探针测试结果显示用曲率补偿法制作的微透镜的焦距可达到3861.70μm,而常规光刻热熔法很难制作出焦距超过200μm的相同尺寸的微透镜阵列.微透镜阵列器件与红外焦平面阵列器件在红外显微镜下对准胶合,显著改善了红外焦平面阵列器件的响应特性.     

控制锡铅合金红外热熔质量

目前使用红外热熔工艺比较少，但由于某些军用产品用的印制电路板，仍以采用此种工艺方法比较多。因为在这种印制板生产工艺中，所采用的焊料镀层仍以锡铅合金电镀的工艺方法沉积形成，是多孔性定向结晶层，表面呈现颗粒状唁灰色的外观，在加工过程中还容易氧化，放置的时间越长其焊接性能也就越差，直接影响使用性能。为此，采用红外热熔工艺方法，使焊料层重新再结晶，表面呈现光亮镀层表面，提高其可焊性能。     

用于改善PtSi红外焦平面阵列器件响应特性的长焦距GaAs微透镜阵列器件的制作研究

提出了一种新的曲率补偿法用于长焦距微透镜阵列的制作。扫描电子显微镜（SEM）显示微透镜阵列为表面极为平缓的方底拱形阵列,表面探针测试结果显示用曲率补偿法制作的微透镜的焦距可达到3861．70um,而常规光刻热熔法很难制作出焦距超过200um的相同尺寸的微透镜阵列。微透镜阵列器件与红外焦平面阵列器件在红外显微镜下对准胶合,显著改善了红外焦平面阵列器件的响应特性。     

用于改善PtSi红外焦平面阵列器件响应特性的长焦距GaAs微透镜阵列器件的制作研究

提出了一种新的曲率补偿法用于长焦距微透镜阵列的制作。扫描电子显微镜 ( SEM)显示微透镜阵列为表面极为平缓的方底拱形阵列 ,表面探针测试结果显示用曲率补偿法制作的微透镜的焦距可达到 3 861.70 μm,而常规光刻热熔法很难制作出焦距超过 2 0 0μm的相同尺寸的微透镜阵列。微透镜阵列器件与红外焦平面阵列器件在红外显微镜下对准胶合 ,显著改善了红外焦平面阵列器件的响应特性     

取代热风整平焊料的化学镀Ni/Au

Dallas,ore-praegitzer industries公司安装了一条化学镀Ni/浸渍金的装置以取代热风整平焊料(HASL)为用户提供各种需求。新的系统使该公司具有与HASL、红外热熔、电镀Ni/Au和有机物涂覆(耐热预焊剂)等工艺,供用户选用。 化学镀Ni/浸渍Au的好处是具有光亮高共面度表面、抗氧化和导电的表面,保     

热熔断体额定动作温度测试方法

1.引言 热熔断体是露置于超过设定温度下,经长时间后使电路断开,仅供一次性使用的元件.它是一种超温保护元件,在一个电气回路中接入一个(或数个)热熔断体,使之成为载流元件.当电路发生故障不能正常工作时,会产生大量的热,令回路本身温度不断上升,当温度达到热熔断体额定动作温度Tf 时,热熔断体熔断,回路被切断,从而有效地防止了设备由于温升过高而导致着火和触电危险,使人身和财产不受侵害.     

光纤热熔接头的抗拉强度及其筛选检验

当前,在多模、单模光纤通信系统工程中,光纤热熔接续技术应用得最广泛。光纤在热熔接续过程中,熔融表面张力效应有使光纤自动对准中心和消除光纤表面微裂纹的作用,因而具有接续损耗小、抗拉强度高的特点。本文主要是针对石英光纤热熔接续抗拉强度下降的机理及其筛选张力的确定进行探讨,以期进一步探索开拓新的光纤热熔接续工艺技术和装备。     

基于光刻胶热熔法的全息光栅表面粗糙度平滑处理

根据表面热动力学原理提出了一种成本低廉、制作周期短、易于实现的光刻胶热熔法,阐述了光刻胶热熔法的基本原理,探讨了光刻胶热熔对光刻胶光栅表面刻槽形状的影响。实验中,分别对经过和未经过热熔处理的光刻胶光栅做了离子束刻蚀。结果表明,利用表面张力作用可使熔融状态下的光刻胶光栅刻槽表面变得平滑,粗糙度降低,并且成功地在K9玻璃基底上得到了槽形较好的全息光栅。     

博富斯公司研制RBS—70激光制导导弹

瑞典博富斯公司研制的RBS—70激光制导短程(3—5公里)防空导弹现已生产,并已开始装备瑞典陆军.但为了进一步提高其战术性能,现正作以下三方面的改进:一、研制一个完整的夜视瞄准装置,以提高RBS—70激光制导导弹对攻击机、直升飞机、无人驾驶机日夜瞄准攻击的能力.为此,采用了一个前视红外被动夜视瞄准装置.前视红外的输出用电视图像显示给瞄准手.改进计划规定,前视红外装置的灵敏度和分辨率要能满足捕获和跟踪距离达10公里的目标.     

GHY—1型红外光源

红外光源,特别是小型的高温红外光源,是各种红外仪器的重要组成部分,其性能的好坏直接影响着各种红外仪器性能和质量的优劣。本文介绍了一种新型红外光源——GHY—1型红外光源的性能、特点及部分使用资料。     

单目图像序列光流三维重建技术研究综述

由单目图像序列光流重建物体或场景的三维运动与结构是计算机视觉、图像处理与模式识别等领域的重要研究内容,在机器人视觉、无人机导航、车辆辅助驾驶以及医学影像分析等方面具有重要的应用。本文首先从精度与鲁棒性等方面对单目图像序列光流计算及三维重建技术近年来取得的进展进行综述与分析。然后采用Middlebury测试图像序列对HS、LDOF、CLG-TV、SOF、AOFSCNN 和 Classic ＋NL 等典型光流算法以及 Adiv、RMROF、Sekkati 和DMDPOF等基于光流的间接与直接重建方法进行实验对比分析,指出各对比方法的优点与不足,归纳各类方法的性能特点与适用范围。最后对利用分数阶微分模型、非局部约束、立体视觉以及深度线索解决亮度突变、非刚性运动、运动遮挡与模糊情况下光流计算及重建模型的局限性与鲁棒性问题进行总结与展望。     

Smart grid sensor data collection,communication, and networking: a tutorial

The smart grid is an innovative energy network that will improve the conventional electrical grid network to be more reliable, cooperative, responsive, and economical. Within the context of the new capabilities, advanced data sensing, communication, and networking technology will play a significant role in shaping the future of the smart grid. The smart grid will require a flexible and efficient framework to ensure the collection of timely and accurate information from various locations in power grid to provide continuous and reliable operation. This article presents a tutorial on the sensor data collection, communications, and networking issues for the smart grid. First, the applications of data sensing in the smart grid are reviewed. Then, the requirements for data sensing and collection, the corresponding sensors and actuators, and the communication and networking architecture are discussed. The communication technologies and the data communication network architecture and protocols for the smart grid are described. Next, different emerging techniques for data sensing, communications, and sensor data networking are reviewed. The issues related to security of data sensing and communications in the smart grid are then discussed. To this end, the standardization activities and use cases related to data sensing and communications in the smart grid are summarized. Finally, several open issues and challenges are outlined. Copyright © 2012 John Wiley & Sons, Ltd.     

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.     

QoS-driven asynchronous uplink subchannel allocation algorithms for space-time OFDM-CDMA systems in wireless networks

In order to support the diverse Quality of Service (QoS) requirements for differentiated data applications in broadband wireless networks, advanced techniques such as space-time coding (STC) and orthogonal frequency division multiplexing (OFDM) are implemented at the physical layer. However, the employment of such techniques evidently affects the subchannel-allocation algorithms at the medium access control (MAC) layer. In this paper, we propose the QoS-driven cross-layer subchannel-allocation algorithms for data transmissions over asynchronous uplink space-time OFDM-CDMA wireless networks. We mainly focus on QoS requirements of maximizing the best-effort throughput and proportional bandwidth fairness, while minimizing the upper-bound of scheduling delay. Our extensive simulations show that the proposed infrastructure and algorithms can achieve high bandwidth fairness and system throughput while reducing scheduling delay over wireless networks. Xi Zhang (S’89-SM’98) received the B.S. and M.S. degrees from Xidian University, Xi’an, China, the M.S. degree from Lehigh University, Bethlehem, PA, all in electrical engineering and computer science, and the Ph.D. degree in electrical engineering and computer science (Electrical Engineering—Systems) from The University of Michigan, Ann Arbor, USA. He is currently an Assistant Professor and the Founding Director of the Networking and Information Systems Laboratory, Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas, USA. He was an Assistant Professor and the Founding Director of the Division of Computer Systems Engineering, Department of Electrical Engineering and Computer Science, Beijing Information Technology Engineering Institute, Beijing, China, from 1984 to 1989. He was a Research Fellow with the School of Electrical Engineering, University of Technology, Sydney, Australia, and the Department of Electrical and Computer Engineering, James Cook University, Queensland, Australia, under a Fellowship from the Chinese National Commission of Education. He worked as a Summer Intern with the Networks and Distributed Systems Research Department, Bell Laboratories, Murray Hills, NJ, and with AT&T Laboratories Research, Florham Park, NJ, in 1997. He has published more than 80 technical papers. His current research interests focus on the areas of wireless networks and communications, mobile computing, cross-layer designs and optimizations for QoS guarantees over mobile wireless networks, wireless sensor and Ad Hoc networks, wireless and wireline network security, network protocols design and modeling for QoS guarantees over multicast (and unicast) wireless (and wireline) networks, statistical communications theory, random signal processing, and distributed computer-control systems. Dr. Zhang received the U.S. National Science Foundation CAREER Award in 2004 for his research in the areas of mobile wireless and multicast networking and systems. He is currently serving as an Editor for the IEEE Transactions on Wireless Communications, an Associated Editor for the IEEE Transactions on Vehicular Technology, and and Associated Editor for the IEEE Communications Letters, and is also currently serving as a Guest Editor for the IEEE Wireless Communications Magazine for the Special Issues of “Next Generation of CDMA vs. OFDMA for 4G Wireless Applications”. He has served or is serving as the Panelist on the U.S. National Science Foundation Research-Proposal Review Panel in 2004, the WiFi-Hotspots/WLAN and QoS Panelist at the IEEE QShine 2004, as the Symposium Chair for the IEEE International Cross-Layer Designs and Protocols Symposium within the IEEE International Wireless Communications and Mobile Computing Conference (IWCMC) 2006, the Technical Program Committee Co-Chair for the IEEE IWCMC 2006, the Poster Chair for the IEEE QShine 2006, the Publicity Co-Chair for the IEEE WirelessCom 2005, and as the Technical Program Committee members for IEEE GLOBECOM, IEEE ICC, IEEE WCNC, IEEE VTC, IEEE QShine, IEEE WoWMoM, IEEE WirelessCom, and IEEE EIT. He is a Senior Member of the IEEE and a member of the Association for Computing Machinery (ACM). Jia Tang (S’03) received the B.S. degree in electrical engineering from Xi’an Jiaotong University, Xi’an, China, in 2001. He is currently a Research Assistant working towards the Ph.D. degree in the Networking and Information Systems Laboratory, Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas, USA. His research interests include mobile wireless communications and networks, with emphasis on cross-layer design and optimizations, wireless quality-of-service (QoS) provisioning for mobile multimedia networks, wireless diversity techniques, and wireless resource allocation. Mr. Tang received the Fouraker Graduate Research Fellowship Award from the Department of Electrical and Computer Engineering, Texas A&M University in 2005.     

Analysis and VLSI Realization of a Blind Beamforming Algorithm

We present the fixed-point analysis and VLSI realization of a maximum-power blind beamforming algorithm. This algorithm consists of the computation of a correlation matrix and its dominant eigenvector, and we propose that the latter be accomplished by the power method. After analyzing the numerical stability of the power method, we derive a division-free form of the algorithm. Based on a block-Toeplitz assumption, we design an FIR filter based system to realize both the correlation computation and the power method. Our ring processor, which is optimized to implement digital filters, is used as the core of the architecture. A special technique for dynamically switching filter inputs is shown to double the system throughput. VLSI design is discussed in detail and chip fabrication results are presented.Fan Xu received the B.S. and M.S. degrees in electronics engineering from Tsinghua University, Beijing, China, in 1993 and 1996, respectively, and the Ph.D. degree in electrical engineering from the University of California, Los Angeles, in 2001. His Ph.D. research focused on algorithm design and analysis for digital signal processors and eigenvector estimation architectures.In 1997, he held an internship at Bell Labs, Lucent Technologies, Holmdel, NJ, where he worked on equalization algorithms for cellular systems. He joined Broadcom Co., Irvine, CA, in 2001. His research interests include VLSI signal processing, customized digital signal processor, efficient hardware architectures for adaptive signal processing and high-performance VLSI design.Guichang Zhong received the B.S. degree from Xi an Jiaotong University, China, in 1996 and the M.S. degree from the Institute of Microelectronics of Chinese Academy of Sciences, Beijing, China, in 2000, both in electrical engineering. He is currently working toward the Ph.D. degree in integrated circuits and systems at the University of California, Los Angeles.His present research interests are in high-performance VLSI digital signal processors design, with an emphasis on reconfigurable and energy-efficient architecture.Alan N. Willson, Jr. received the B.E.E. degree from the Georgia Institute of Technology, Atlanta, in 1961, and the M.S. and Ph.D. degrees from Syracuse University, Syracuse, NY, in 1965 and 1967 respectively.From 1961 to 1964 he was with IBM, Poughkeepsie, NY. He was an Instructor in electrical engineering at Syracuse University from 1965 to 1967. From 1967 to 1973 he was a Member of the Technical Staff at Bell Laboratories, Murray Hill, NJ. Since 1973, he has been on the faculty of the University of California, Los Angeles (UCLA), where he is Professor of Engineering and Applied Science in the Electrical Engineering Department. In addition, he served the UCLA School of Engineering and Applied Science as Assistant Dean for Graduate Studies from 1977 through 1981 and as Associate Dean of Engineering from 1987 through 2001. He has been engaged in research concerning computer-aided circuit analysis and design, the stability of distributed circuits, properties of nonlinear networks, theory of active circuits, digital signal processing, analog circuit fault diagnosis, and integrated circuits for signal processing. He is editor of Nonlinear Networks: Theory and Analysis (New York: IEEE Press, 1974). In 1991 he founded Pentomics, Inc.Dr. Willson is a member of Eta Kappa Nu, Sigma Xi, Tau Beta Pi, the Society for Industrial and Applied Mathematics, and the American Society for Engineering Education. From 1977 to 1979, he served as Editor of the IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS. In 1980, he was General Chairman of the 14th Asilomar Conference on Circuits, Systems, and Computers. During 1984, he served as President of the IEEE Circuits and Systems Society. He was the recipient of the 1978 and 1994 Guillemin-Cauer Awards of the IEEE Circuits and Systems Society, the 1982 GeorgeWestinghouse Award of the American Society for Engineering Education, the 1982 Distinguished Faculty Award of the UCLA Engineering Alumni Association, the 1984 Myril B. Reed Best Paper Award of the Midwest Symposium on Circuits and Systems, the 1985 and 1994 W.R.G. Baker Awards of the IEEE, the 2000 Technical Achievement Award and the 2003 Mac Van Valkenburg Award of the IEEE Circuits and Systems Society.     

基于暗通道先验原理的偏振图像去雾增强算法研究

在装备试验与测试中,常规光学成像系统极易受气象环境(如雾霾、沙尘等)影响,导致探测距离、成像效果、测量精度等受到大幅限制,从而严重影响目标成像效果及关键参数获取。如何增强雾霾条件下光学探测识别能力及成像质量,成为了当前急需解决的关键问题。本文利用偏振成像优势,结合暗通道先验原理,提出了基于暗通道先验原理的偏振图像去雾增强算法。该算法首先利用采集到的偏振图像提取偏振特征,计算偏振度和偏振角;同时,采用基于区域增长算法自动提取出天空区域,对天空区域进行大气光参数估计,获取大气光偏振度及偏振角相关参数估计;然后,结合暗通道先验原理,获取无穷远处大气光强,进而计算各像素点的大气光强;最后,建立在大气物理退化模型基础上,实现图像去雾增强。实例分析与验证中,通过主观评价与客观评价两种方法,对比本文提出的方法和常见其他方法,实际结果表明,本文算法去雾增强能力较强,能有效提升光学系统的探测识别能力及成像质量,对雾霾条件下武器装备关键参数获取具有重要意义。     

一种智慧协同网络多参数的多路径路由算法

多路径路由技术采用多条路径同时传输,作为优化资源配置和负载均衡的重要技术,在路由可靠性、QoS路由、传输效率等多方面比单路径传输具有优势.现有互联网网络资源配置和路由机制相对静态和僵化,导致多路径技术的发展存在发展的局限性.现有多路径技术考虑在路由层面不利于多路径路由选择和计算,难以保证传输性能,降低网络传输效率.智慧协同网络能够动态感知网络需求,灵活适配网络资源,更好的支持路由可扩展性.本文在智慧协同网络架构下提出了一种智慧协同网络多参数的多路径路由算法.该算法制定了智慧协同网络多参数的多路径路由协议,对网络性能参数CPU占用率、往返时延(RTT)、带宽进行加权计算得到路径权重值,根据权重值进行流量分配.采用图论理论对网络流量分配及模型进行了分析.并在Mini-Net平台上进行了开发和实验,结果表明,该算法能够优化网络配置,减小往返时延,提高网络吞吐量,从而提高网络性能,实现负载均衡.     

Maxwell, Hertz, and German radio-wave history

Although early reports about electricity and magnetism date back before Christ, it took another 2000 years until in the eighteenth century, men like B. Franklin, A. Volta, C. Coulomb, L. Galvani, and many others studied more intensely electrostatic and magnetostatic effects. In contrast to mechanics, hydrodynamics, and astronomy, which belonged to the mathematics discipline, electricity and magnetism were usually investigated by physicians, pharmacists, priests, philosophers, chemists, and fascinated amateurs. However, at the end of the eighteenth century and the beginning of the nineteenth century, researchers with mathematical backgrounds took over in France and later in Great Britain and Germany. Because of the many schools of thought and parallel developments in the nineteenth century, the authors first briefly mention the many evolutionary achievements made outside Germany before considering German contributions for the late eighteenth century to the early twentieth century     

Adaptive Coding and Modulation for Mobile Wireless Access Via High Altitude Platforms

In this paper we are concerned with broadband wireless access via high altitude platform system, providing the Internet access and broadband multimedia services to passengers equipped with WLAN terminals connecting through a collective terminal mounted on the train. The main challenge in such scenario is the development of efficient and reliable radio interface for the broadband communication link in the mobile wireless access segment. We are focusing on performance analysis of the adaptive coding and modulation scheme in the communication link between a high altitude platform and a collective terminal on-board moving train. In order to increase the reliability of the communication system in a fading environment we also exploit space and platform diversity. The proposed approach significantly increases the throughput of the wireless access system, while bit error rate remains below the target value regardless of the considered propagation environment.Tomaz Javornik received his B.Sc., M.Sc. and Ph.D. degrees in electrical engineering from the University of Ljubljana, Slovenia, in 1987, 1990 and 1993, respectively. He joined the Jozef Stefan Institute in 1987, where he currently works as a researcher in the Department of Digital Communications and Networks. He is involved in the study of digital radio-relay systems, modulation techniques, coding, adaptive signal processing and digital mobile communication systems.Mihael Mohorcic received B.Sc., M.Sc. and Ph.D. degrees in Electrical Engineering from the University of Ljubljana, Slovenia, in 1994, 1998 and 2002, respectively, and M.Phil. degree in Electrical Engineering from University of Bradford, UK, in 1998. He is a research fellow in the Department of Digital Communications and Networks at the Jozef Stefan Institute. In 1996/1997 he spent 12 months as a Visiting Scientist at University of Bradford, Bradford, UK. His research interests include development and performance evaluation of network protocols and architectures for mobile and wireless communication systems, and resource management in satellite and high altitude platforms networks with the emphasis on routing algorithms and traffic engineering. He is a member of IEEE.Ales Svigelj received his B.Sc., M.Sc. and Ph.D. degrees in Electrical Engineering from the University of Ljubljana, Ljubljana, Slovenia, in 1997, 2000 and 2003 respectively. He is a research associate in the Department of Digital Communications and Networks at the Jozef Stefan Institute. In 2000/2001 he spent one year as a visiting researcher at Leeds Metropolitan University in Leeds, UK. He has participated in several national and international projects. His research interests concern the development of telecommunications systems, network protocols and architectures for satellite, high altitude platforms and terrestrial mobile communication systems. In 2004 he was awarded with The Jozef Stefan Golden Emblem Prize for outstanding contributions made to science in Doctoral theses in the field of natural sciences in Slovenia.Igor Ozimek received his B.Sc., M.Sc. and Ph.D. degrees in electrical engineering from the University of Ljubljana, Slovenia in 1980, 1988 and 1993, respectively. Since 1980 he has been with the Jozef Stefan Institute, Ljubljana, where he works as a researcher. His current interests include digital communications,DSP processing and computer networks.Gorazd Kandus received B.Sc., M.Sc. and Ph.D. degrees in Electrical Engineering from the University of Ljubljana, Ljubljana, Slovenia, in 1971, 1974 and 1991, respectively. He is currently the head of the Department of Digital Communications and Networks at the Jozef Stefan Institute and a Professor at the Faculty of Electrical Engineering, Computer Science and Information Technology, University of Maribor. He spent one year at Worchester Polytechnic Institute, Worchester, MA, as a Fulbright Fellow and 5 months as a Visiting Scientist at the University of Karlsruhe, Germany. His main research interests include design and simulation of mobile and wireless communication systems and development of new telecommunication services. He is a member of IEEE and Upsilon Pi Epsilon.     

鼻牙槽嵴塑形矫治器在单侧完全性唇腭裂鼻唇畸形矫治中的效果评价

目的：客观评价带鼻撑可固位柱的鼻牙槽嵴塑形（presurgical nasoalveolar molding,PNAM）矫治器对单侧完全性唇腭裂患者鼻唇畸形的矫治效果.方法：选择符合纳入标准的三组病例各14例.病例组患者出生后1月内即使用带鼻撑及固位柱的PNAM矫治器同期完成鼻唇部与腭部畸形矫治.通过对三组对象标准鼻唇部正位及鼻底位照片的标准与测量,并对测量结果行配对t检验与多元方差分析,客观评价对鼻唇部的矫治效果.结果：PNAM矫治能使患者鼻尖高度,鼻小柱高度与宽度,双侧鼻孔高度、宽度、周长与面积及上唇面积明显增加（P〈0.05）,而双侧鼻翼高度差、鼻底裂隙宽度、鼻类与鼻小柱倾斜度明显减小（P〈0.05）;