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。     

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。     

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。     

An Efficient Adaptive Grouping for Single Code Assignment in WCDMA Mobile Networks

For achieving high utilization and efficient code management of the OVSF code tree in 3G WCDMA networks, several researches have extensively studied. Based on combining both the code assignment and the reassignment mechanisms, it increases obviously high utilization and reduces completely the code blocking. Nevertheless, the required rate of traffic should be powers of two of the basic rate, i.e. 1R, 2R, 4R, …, etc., which is impractical and results in wasting the system bandwidth while the required rate is not powers of two of the basic rate. Several multi-code assignment mechanisms have proposed to reduce the waste rate. Nevertheless, these methods bring two inevitable drawbacks including, high complexity of handling multiple codes, and increasing the cost of using more rake combiners at both the base stations and mobile nodes. Therefore, we propose an adaptive grouping code assignment herein to provide a single channelization code for any possible rate of traffic, even though the required rate is not powers of two of the basic rate. Based on the dynamic programming algorithm, the adaptive grouping approach forms several calls into a group. Then it allocates a subtree to the group and adaptively shares the subtree codes for these calls in the concept of time-sharing of slots during a group cycle time. Therefore, the waste rate and code blocking are thus reduced obviously while using a single rake combiner. Since the delay problem may be occurred in such a time-sharing approach, we propose two schemes of cycle interleaving methods to reduce delay. Numerical results indicate that the proposed adaptive grouping approach reduces significantly the waste rate and thus increases the system utilization. Moreover, the proposed cycle interleaving scheme reduces data delay significantly. Ren-Hung Hwang received his M.S. and Ph.D. degrees in computer science from University of Massachusetts, Amherst, Massachusetts, USA, in 1989 and 1993, respectively. He joined the Department of Computer Science and Information Engineering, National Chung Cheng University, Chia-Yi, Taiwan, in 1993, where he is now a full Professor and the Chair of the Department of Communication Engineering. His research interests include Internet QoS, peer-to-peer infrastructure design, and 3G QoS. Ben-Jye Chang received his M.S. degree in computer engineering from University of Massachusetts, Lowell, in 1991 and the Ph.D. degree in computer science and information engineering from National Chung-Cheng University, Taiwan, in 2001. He joined the Department of Computer Science and Information Engineering faculty at Chaoyang University of Technology, Taiwan, in 2002, where he is currently an Associate Professor. His research interests include QoS-based networks, QoS wirless networking, resource management for wireless networks and mobile cellular networks, and performance evaluation of networks. Min-Xiou Chen received the BS degree in computer science and information engineering from Tung Hai University, Tai-Chung, Taiwan, in 1996, and the MS and PhD degrees in computer science and information engineering from National Chung Cheng University, Chia-Yi, Taiwan, in 1998 and 2005, respectively. He is now an assistant professor at the Department of Computer Science and Information Engineering, Chung Hua University, Hsin-Chu, Taiwan. His research interests include wireless communication, SIP, sensor network and resource management in WCDMA systems. He is a member of the IEEE. Kun-Chan Tsai received the BS degree in information engineering and computer science from Feng Chia University, Taichung, Taiwan, in 2001, and the MS degree in computer science and information engineering from National Chung Cheng University, Chia-Yi, Taiwan, in 2003. His research interests include wireless communications and resource management in WCDMA systems.     

云边协同中的资源调度优化

随着业务类型的丰富和多样化，低时延、高带宽、数据私密性、高可靠性等成为业务普遍的要求。边缘计算、雾计算、分布式云、算力网络等方案相继被提出，并在产学研各界引发了深度的研究和探索。针对“多级的算力分布以及算力的协同将是未来算力结构的主流”这一观点，产业内外达成了共识，算力管理、分配、调度等与资源优化相关的问题也成为当下的研究热点和重点攻关方向。为此，面向未来的算力供给结构，首先描述了学术界、产业界资源调度优化问题的最新进展，总结了当前的主要方法论和工程实施架构；然后，针对两种典型的云边协同场景，从场景拆分、调度目标、求解方案依次进行分析，给出了适应场景特性的资源调度优化参考方案。     

星-地激光雷达联合观测合肥地区的气溶胶垂直分布

通过匹配星载CALIOP过境合肥时间,筛选Aerosol-lidar的观测数据,选取4个典型天气个例[沙尘天气、多云天气、中度污染(无云)、中度污染(有云)],对合肥地区的气溶胶进行联合观测,并对气溶胶的类型、气溶胶的变化、气溶胶污染的成因及来源进行分析。结果表明,多云天气下,星载激光雷达对底层气溶胶探测时会受到天气的影响,而地基激光雷达的探测效果较佳,可以通过定点连续观测距离的校正信号准确地反映气溶胶含量和变化特点。星-地激光雷达的联合观测可以更好地分析多种复杂天气的气溶胶变化。联合观测结果表明:轻度污染的沙尘型和受污染的浮尘型气溶胶主要集中在0.8~1.6 km高度范围内,退偏振比集中在0.18~0.20之间;多云天气的气溶胶主要为污染大陆型,集中在0.4~1.2 km高度范围内,其退偏振比在0.015~0.020之间,气溶胶含量很少且为具有球形粒子属性的细颗粒物;中度污染(无云)天气的气溶胶同时包含污染浮尘型和污染大陆型,主要集中在0.3~1.3 km高度范围内,退偏振比在0.08以下,具有明显的球形粒子属性;中度污染(有云)天气的气溶胶也同时包含污染浮尘型和污染大陆型,主要集中在0.8~1.4 km高度范围内,退偏振比在0.075~0.100范围内,为粒径较小的球形粒子。     

基于区块链技术的高校信息化建设研究

区块链技术具有去中心化、安全高效、不可篡改等特征,与高校信息化建设中的独立性和科学化要求相吻合。高校在信息化建设中,可借助区块链这一优势,对数据管理等工作进行有效管理,实现信息化建设目标。但在信息化建设中,高校显现出规章制度不完善、应用生态不成熟、监管机制不健全、法律法规不完善、区块链人才紧缺等问题,影响了高校信息化建设的革新进程。基于此,高校可从区块链技术的优势入手,从规章制度、生态体系、监管体系、法律法规、人才体系等方面探寻新的发展思路。     

Service characterization for cost/benefit optimization of?enhanced?UMTS

In this paper an all-IP Enhanced-Universal Mobile Telecommunications System (E-UMTS) is considered, where enhancements include link level behavior, high-speed downlink packet access (HSDPA) channel, resource management, Diffserv architecture, and Radio Resource Management schemes. An overview of E-UMTS deployment scenarios and service needs is presented based on the views of relevant players. Deployment and mobility scenarios are considered, including expected population density and usage of service mix for three environments, namely offices, urban/vehicular, and business city center. In addition, based on population and service penetration values, E-UMTS traffic generation and activity models are described and characterized. Based on these scenarios and characterizations, system level simulations are carried out and the enhanced service quality performance is demonstrated, including blocking probability, handover failure probability and end-to-end delay in each deployment scenario. By using system level simulations, services and environmental conditions can be mapped into deployment strategies (and supported system capacity) whose evaluation is essential prior to field trials and real implementation. On the one hand, costs depend on the prices of the spectrum, equipment, operation and maintenance, as well as on the number of cells which, in turn, depends on the cell radius. On the other, revenues depend on the price per MB and on the supported throughput. As the goal of operators and service providers is to maximize the profit, the profit in percentage was obtained for the three considered scenarios. Its optimum values are found for cell radii around 31, 257, and 310 m for offices, vehicular and business city center scenarios, respectively.     

Surface-Bound Microgels for Separation,Sensing, and Biomedical Applications

This study presents a comprehensive survey of microgel-coated materials and their functional behavior, describing the complex interplay between the physicochemical and mechanical properties of the microgels and the chemical and morphological features of substrates. The cited literature is articulated in four main sections: i) properties of 2D and 3D substrates, ii) synthesis, modification, and characterization of the microgels, iii) deposition techniques and surface patterning, and iv) application of microgel-coated surfaces focusing on separations, sensing, and biomedical applications. Each section discusses – by way of principles and examples – how the various design parameters work in concert to deliver functionality to the composite systems. The case studies presented herein are viewed through a multi-scale lens. At the molecular level, the surface chemistry and the monomer make-up of the microgels endow responsiveness to environmental and artificial physical and chemical cues. At the micro-scale, the response effects shifts in size, mechanical, and optical properties, and affinity towards species in the surrounding liquid medium, ranging from small molecules to cells. These phenomena culminate at the macro-scale in measurable, reversible, and reproducible effects, aiming in a myriad of directions, from lab-scale to industrial applications.     

基于微件的井位部署论证系统实现

针对勘探、油藏井位部署过程中涉及的地理位置、勘探开发历程、油藏地质特征、产能状况等重要环节,对油田各级地质构造、三级储量、沉积相、井位等勘探开发图形对象叠加地形地貌在平面上进行多尺度、多层系的图形展示,并结合地质信息服务和企业数据服务,实现了探区内地震资料处理、解释一体化查询展示、已探邻井相关资料一体化研究、正钻井生产状况实时查询、区块内岩性、物性统计分析、油气储量分布情况展示、井位的在线编辑及成果标注等功能,有效支撑井位部署过程中的各种数据查询、在线踏勘、井位编辑,统计分析以及成果展示,从而提高油田井位部署的效率及水平。     

光刻与微纳制造技术的研究现状及展望

首先介绍了微纳制造的关键工艺技术——光刻技术。回顾了光刻技术的发展历程,介绍了各阶段主流光刻技术的基本原理和特点。阐述了国内外对光刻技术的研究现状,并讨论了光刻与微纳制造技术面临的挑战及其需要解决的关键性技术问题。然后重点介绍了浸没光刻、极紫外光刻、电子束光刻、离子束光刻、X射线光刻、纳米压印光刻等技术的概念、发展过程和特点,并对不同光刻技术的优缺点和生产适用条件进行了比较。最后结合国内外生产商、工程师和研究学者的研究成果,对光刻技术的未来发展做出展望。     

基于Zernike矩与SIFT特征的商标检索算法

为降低商标检索算法的误检率,提出一种结合Zernike矩(ZM)和尺度不变特征变换(SIFT)的商标检索算法,该算法由离线数据库构建和在线检索组成。分别从查询图像中提取ZM和SIFT特征;根据查询图像的特征集与数据库中存储的图像的特征集之间的ZM特征进行相似度度量,形成候选商标集;最后,利用SIFT特征对查询图像与候选图像精准检测,对相似距离进行排序,将结果返回给用户。实验结果表明：与当前流行的商标检索算法相比,该算法具备更好的检索性能,在缩放、平移、模糊、透视、斜切、扭曲等变换干扰下,仍呈现出更理想的Precision- Recall曲线以及F值。     

Hybrid Morphology Processing Unit Architecture for Moving Object Segmentation Systems

Video segmentation is a key operation in MPEG-4 content-based coding systems. For real-time applications, hardware implementation of video segmentation is inevitable. In this paper, we propose a hybrid morphology processing unit architecture for real-time moving object segmentation systems, where a prior effective moving object segmentation algorithm is implemented. The algorithm is first mapped to pixel-based operations and morphological operations, which makes the hardware implementation feasible. Then the high computation load, which is more than 4.2 GOPS, can be overcome with a dedicated morphology engine and a programmable morphology PE array. In addition, the hardware cost, memory size, and memory bandwidth can be reduced with the partial-result-reuse concept. This chip is designed with TSMC 0.35 μm 1P4M technology, and can achieve the processing speed of 30 QCIF frames or 7,680 morphological operations per second at 26 MHz. Simulation shows that the proposed hardware architecture is efficient in both hardware complexity and memory organization. It can be integrated into any content-based video processing and encoding systems. Shao-Yi Chien was born in Taipei, Taiwan, R.O.C., in 1977. He received the B.S. and Ph.D. degrees from the Department of Electrical Engineering, National Taiwan University (NTU), Taipei, in 1999 and 2003, respectively. During 2003 to 2004, he was a research staff in Quanta Research Institute, Tao Yuan Shien, Taiwan. In 2004, he joined the Graduate Institute of Electronics Engineering and Department of Electrical Engineering, National Taiwan University, as an Assistant Professor. His research interests include video segmentation algorithm, intelligent video coding technology, image processing, computer graphics, and associated VLSI architectures. Bing-Yu Hsieh was born in Taichung, Taiwan, in 1979. He received the B.S.E.E and M.S.E.E degrees from National Taiwan University (NTU), Taipei, in 2001 and 2003, respectively. He joined MediaTek, Inc., Hsinchu, Taiwan, in 2003, where he develops integrated circuits related to multimedia systems and optical storage devices. His research interests include object tracking, video coding, baseband signal processing, and VLSI design. Yu-Wen Huang was born in Kaohsiung, Taiwan, in 1978. He received the B.S. degree in electrical engineering and Ph. D. degree in the Graduate Institute of Electronics Engineering from National Taiwan University (NTU), Taipei, in 2000 and 2004, respectively. He joined MediaTek, Inc., Hsinchu, Taiwan, in 2004, where he develops integrated circuits related to video coding systems. His research interests include video segmentation, moving object detection and tracking, intelligent video coding technology, motion estimation, face detection and recognition, H.264/AVC video coding, and associated VLSI architectures. Shyh-Yih Ma received the B.S.E.E, M.S.E.E, and Ph.D. degrees from National Taiwan University in 1992, 1994, and 2001, respectively. He joined Vivotek, Inc., Taipei County, in 2000, where he developed multimedia communication systems on DSPs. His research interests include video processing algorithm design, algorithm optimization for DSP architecture, and embedded system design. Liang-Gee Chen was born in Yun-Lin, Taiwan, in 1956. He received the BS, MS, and Ph.D degrees in Electrical Engineering from National Cheng Kung University, in 1979, 1981, and 1986, respectively. He was an Instructor (1981–1986), and an Associate Professor (1986–1988) in the the Department of Electrical Engineering, National Cheng Kung University. In the military service during 1987 and 1988, he was an Associate Professor in the Institute of Resource Management, Defense Management College. From 1988, he joined the Department of Electrical Engineering, National Taiwan University. During 1993 to 1994 he was Visiting Consultant of DSP Research Department, AT&T Bell Lab, Murray Hill. At 1997, he was the visiting scholar of the Department of Electrical Engineering, University, of Washington, Seattle. Currently, he is Professor of National Taiwan University. From 2004, he is also the Executive Vice President and the General Director of Electronics Research and Service Organization (ERSO) in the Industrial Technology Research Institute (ITRI). His current research interests are DSP architecture design, video processor design, and video coding system. Dr. Chen is a Fellow of IEEE. He is also a member of the honor society Phi Tan Phi. He was the general chairman of the 7th VLSI Design CAD Symposium. He is also the general chairman of the 1999 IEEE Workshop on Signal Processing Systems: Design and Implementation. He serves as Associate Editor of IEEE Trans. on Circuits and Systems for Video Technology from June 1996 until now and the Associate Editor of IEEE Trans. on VLSI Systems from January 1999 until now. He was the Associate Editor of the Journal of Circuits, Systems, and Signal Processing from 1999 until now. He served as the Guest Editor of The Journal of VLSI Signal Processing Systems for Signal, Image, and Video Technology, November 2001. He is also the Associate Editor of the IEEE Trans. on Circuits and Systems II: Analog and Digital Signal Processing. From 2002, he is also the Associate Editor of Proceedings of the IEEE. Dr. Chen received the Best Paper Award from ROC Computer Society in 1990 and 1994. From 1991 to 1999, he received Long-Term (Acer) Paper Awards annually. In 1992, he received the Best Paper Award of the 1992 Asia-Pacific Conference on Circuits and Systems in VLSI design track. In 1993, he received the Annual Paper Award of Chinese Engineer Society. In 1996, he received the Out-standing Research Award from NSC, and the Dragon Excellence Award for Acer. He is elected as the IEEE Circuits and Systems Distinguished Lecturer from 2001–2002.