恶性斗殴为何屡禁不止？——运营商互殴：粗暴宣泄何以为“道”!

“我有一个梦想：某一天三大运营商员工不摆摊了,不打架了,员工年收入差距缩小了,前端营业员待遇提高了,后端装维与资源矛盾化解了,服务质量提高了,恶性竞争消除了,重复建设停止了,不再破坏对手广告了,不互挖墙角搞策反了,不再零元购机了,不打价格战了,都能活的有尊严了”.     

Wedding……

兄弟结婚了，朋友结婚了，朋友的朋友结婚了；男的结婚了，女的结婚了，不男不女的也结婚了；有感情的结婚了，没感情的结婚了，认识不认识的结婚已经无所谓了……     

对VoWLAN技术的MAC研究与改进

提出了一种适合VoWLAN技术DEDCA接入机制,引入了信道状态CS因子,提出了基于信道状态的动态的退避窗口机制和一种新的退避方式.确立了退避窗户最大值和最小值的与信道关系的公式,确立了退避方式阀值的公式,最后通过进行了仿真,DEDCA不但对视频和音频有QoS保证,整个信道的性能都提高了,验证了DEDCA的正确性和适合在VoWLAN技术中的应用.     

论装配式配电站的建设

装配式配电站的建设与发展,为电力行业的发展带来了全新的力量,极大地供应了整个社会的用电需求,提高了供电系统的运转水平,也为配电站建设节省了空间,削减了施工程序和周期,减少了环境污染,为整个社会创造了良好的经济效益和环境效益。本文分析了装配式配电站建设的方案、优势、技术以及效益。     

恶性斗殴为何屡禁不止?

"我有一个梦想:某一天三大运营商员工不摆摊了,不打架了,员工年收入差距缩小了,前端营业员待遇提高了,后端装维与资源矛盾化解了,服务质量提高了,恶性竞争消除了,重复建设     

直流供电程控滤波器设计

设计和实现了一种便携式直流供电程控滤波器系统.根据外场试验需求,确定了系统硬件部分的主要工作参数,提出了以单片机控制多通道程控滤波器模块作为硬件设计方案,设计了备功能模块的处理任务和功能,构建了硬件系统.设计了系统中控制软件的程序流程,提出了控制软件设计方案,用MSP430汇编语言和C语言编写控制软件.对系统进行了测试,结果表明符合设计要求.     

基于ZEMAX的红外光学系统设计与优化

阐述了该光学系统研究的意义,确定了基本设计原则。然后进行了平行光管和望远镜的高斯光学结构模型及设计,建立了具体的数学模型并进行求解。最后根据目标耦合光路结构,利用ZEMAX软件对该光学系统进行了优化设计,对优化结果进行了像质评价,得出了结论。该系统解决了红外光学精确制导系统动态跟踪特性的内场测试的一系列问题,促进了红外黑体跟踪目标地面等效测试的发展,对提升仿真试验技术能力提供了重要的硬件支撑。     

某测试转台电控系统设计

给出了测试转台电控系统的组成,着重讨论了伺服控制单元的设计,详细介绍了伺服主控模块的设计和对外接口,分析计算了转台负载力矩,并由此给出了伺服电机的选型,简要介绍了系统的电源设计。最后研制出了测试转台样机,给出了测量误差,对类似工程设计具有一定的参考意义。     

基于公平性的自相似业务接纳控制研究

文中研究了基于分形稳定运动有效带宽的计算方法,利用迭代过程推导出了聚合流有效带宽的计算公式,提出了一种基于有效带宽的公平性的自相似业务接纳控制算法,在接纳判断过程中引入了公平性机制,保证了业务接纳的公平性,通过MATLAB和OPNET相结合的仿真方法证明了该算法的有效性.结果证明了文中提出的算法保障了网络的服务质量,保证了各业务接纳的公平性,同时保持了网络高的利用率.     

基于XSLT和XML改进的Struts框架研究

介绍了Struts的框架模式以及流程,XML和XSLT的特点,分析了目前Struts的框架的优缺点,提出了新的改进方法,给出并分析了改进方法的流程图,还讲解了新方案的核心类的实现。重点讲解了如何用XSLT和XML改进Struts,最后阐述了改进后的优势。     

舰载雷达及电子对抗装备性能测试评估系统的设计与实现

利用软硬件结合方式,设计一种针对舰艇雷达及电子对抗装备主要性能的测试及评估系统,实现非接触测试,无须上舰,在距离舰艇100~200 m的码头,采用"定量比对法"对雷达及对抗装备的关键参数进行测试和评估。     

3G接入技术中认证鉴权的安全性研究

对3G用户接入时的认证鉴权进行分析和研究，介绍了3G的安全体系结构，详细分析了3G的认证和鉴权机制和过程、用户信息的加密和完整性保护的过程和方法、密钥协商机制，并指出了3G认证鉴权机制可能存在的缺陷，最后对2G和3G的互通方面的安全性和2G与3G安全上下文之间转换运算的算法进行了分类和剖析。     

All-Learning: The state of the art of the models and the methodologies educational with ICT

This paper presents a systematic review of models and methodologies that integrate information and communication technologies (ICT) and education. The systematic review was based on the methodology of Kitchenham. The steps used and developed correspond to the steps proposed in the methodology. The starting point of the review are the research questions, then keywords, selection of the databases, definition of the inclusion and exclusion criteria, the definition of the search chains, search process and selection of papers, the analyzes of the paper and the results of the systematic review to answer the questions posed. In the systematic review, 919 papers were found in 6 academic databases and 129 relevant papers were selected. The work developed intends to know the different models and methodologies that integrate the ICT and the education. Develop an analysis and characterize to find common elements among models and methodologies. The idea is to find limitations, disadvantages and spaces that allow to propose a new model. This systematic review is the first step in the development of a doctoral research in which the development of a U-Learning model based on Connective Learning and Experience Learning is proposed.     

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.     

小信号多腔速调管主要性能指标简化分析

介绍了速调管在我国的发展现状和小信号条件下速调管的各种主要性能指标的简化分析方法。在这种简化分析方法中,首先不考虑非线性和相对论效应等带来的影响,并把多腔速调管看作是几个双腔速调管的级联,得出了增益、效率、带宽和输出功率等重要参数的计算公式。然后通过给出部分参数的修正系数说明了这种简化分析方法的实用价值及理论指导意义。     

基于S3C2440的智能模拟人的控制

以S3C2440为平台,实现了S3C2440单板机对智能模拟人的控制箱,按压和通气功能的控制,以及S3C2440与上位机通信功能,通过对内核的裁剪和驱动及控制程序的编写,不仅可以实现各种控制箱的操作,而且也可以对模拟人的按压和通气模拟操作功能进行控制,产生与之对应的各种模拟反应。最后,提出了用设置加权系数的办法解决按压和通气控制条反应速率过缓问题。     

GPS 接收机交调互调敏感度测试方法研究

GPS 卫星定位技术已广泛应用于航空航天系统。本文通过阐述GPS 接收机的工作原理及GPS 信号的特点,分 析了接收机交调互调传导敏感度测量原理,扩展了GPS 接收机交调互调传导敏感度的试验方法。该测试方法快捷、易 于掌握,便于得到接收机互调交调抑制比参数。     

直流电源输出的纹波和噪声的测量

对于直流电源纹波和噪声的测量,不同的测量方法测量的结果往往差别较大。针对这个问题,本文先介绍了电源输出的纹波和噪声的基本概念,并在此基础上介绍了三种常见的纹波和噪声的测量方法：直接测量的方法、去掉探头和探头接地线的测量方法和使用同轴电缆的测量方法。通过分析、比较,阐明了不同测量方法之间的区别,明确了对示波器的要求及测量的注意事项,以使大家能够根据具体情况选用适宜、方便的测量方法,准确地测量到直流电源输出的纹波和噪声。     

Designing an Embedded Video Processing Camera Using a 16-bit Microprocessor for a Surveillance System

This paper describes the design and implementation of a hybrid intelligent surveillance system that consists of an embedded system and a personal computer (PC)-based system. The embedded system performs some of the image processing tasks and sends the processed data to the PC. The PC tracks persons and recognizes two-person interactions by using a grayscale side view image sequence captured by a stationary camera. Based on our previous research, we explored the optimum division of tasks between the embedded system and the PC, simulated the embedded system using dataflow models in Ptolemy, and prototyped the embedded system in real-time hardware and software using a 16-bit CISC microprocessor. This embedded system processes one 320 × 240 frame in 89 ms, which yields one-third of the rate of 30 Hz video system. In addition, the real-time embedded system prototype uses 5.7 K bytes of program memory, 854 K bytes of internal data memory and 2 M bytes external DRAM. Koichi Sato is a Ph.D. student in the Department of Electrical and Computer Engineering at The University of Texas at Austin. He earned his B.S. in University of Tokyo, Japan in 1993. He worked for Automotive Development Center in Mitsubishi Electric Corporation where he was involved in lane and automobile recognition in vehicle video processing products such as automatic cruise control and drowsiness detection systems. He enrolled in the current University at 1998 and received an M.S in 2000. In his Master's thesis he worked on human tracking and human interaction recognition. His current work includes velocity extraction using the TSV transform, object tracking, and 3D object reconstruction. Brian L. Evans is a tenured Associate Professor in the Department of Electrical and Computer Engineering at The University of Texas at Austin. His research and teaching efforts are in embedded real-time signal and image processing systems. In signal processing, his research group is focused on the design and real-time software implementation of ADSL and VDSL transceivers, for high-speed Internet access. In image processing, his group is focused on the design and real-time software implementation of high-quality halftoning for desktop printers, smart image acquisition for digital still cameras, and 3-D sonar imaging systems. In signal and image processing, Dr. Evans has published over 100 refereed conference and journal papers. Dr. Evans is the primary architect of the Signals and Systems Pack for Mathematica, which has been on the market since October 1995. He was a key contributor to UC Berkeley's Ptolemy Classic electronic design automation environment for embedded systems, which has been successfully commercialized by Agilent and Cadence. His BSEECS (1987) degree is from the Rose-Hulman Institute of Technology, and his MSEE (1988) and PhDEE (1993) degrees are from the Georgia Institute of Technology. From 1993 to 1996, he was a post-doctoral researcher in the Ptolemy project at UC Berkeley. He is a member of the Design and Implementation of Signal Processing Systems Technical Committee of the IEEE Signal Processing Society, and a Senior Member of the IEEE. He is the recipient of a 1997 National Science Foundation CAREER Award. J.K. Aggarwal has served on the faculty of The University of Texas at Austin College of Engineering since 1964 and is currently Cullen Professor of Electrical and Computer Engineering and Director of the Computer and Vision Research Center. His research interests include computer vision and pattern recognition focusing on human motion. A Fellow of IEEE since 1976 and IAPR since 1998, he received the Senior Research Award of the American Society of Engineering Education in 1992, the 1996 Technical Achievement Award of the IEEE Computer Society and the graduate teaching award at The University of Texas at Austin in 1992. He has served as Chairman of the IEEE Computer Society Technical Committee on Pattern Analysis and Machine Intelligence (1987--1989); Director of the NATO Advanced Research Workshop on Multisensor Fusion for Computer Vision, Grenoble, France (1989); Chairman of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition (1993), and President of the International Association for Pattern Recognition (1992--1994). He is a Life Fellow of IEEE and Golden Core member of IEEE Computer Society. He has authored and edited a number of books, chapters, proceedings of conferences, and papers.     

胆小管超微细胞酶学研究

以电镜细胞化学的方法,观察了小鼠胆小管酶的分布。观察的12种酶中,NDPase和G6Pase三种酶分布于胆小管微绒毛;AlPase、Na~+-K~+ATPase、Mg~(++)-ATPase、Ca~(++)-ATPase、CMPase、ACase和5＇-Nase等7种酶分布于胆小管微绒毛,也分布于肝细胞邻接面细胞膜和Disse间隙微绒毛;ACPase、细胞色素氧化酶以及线粒体ATPase不分布胆小管微绒毛,也不分布Disse间隙微绒毛和肝细胞膜。据信,胆小管微绒毛上的酶参与胆汁成份的转运,提供转运所需能量以及还可能与某些代谢过程有关。本实验中磷酸水解酶类使用的铈基法及亚铁氰化钾半还原的锇酸后固定法,效果优于铅法。