地下管线剖面图制作探讨

建立科学、完整和准确的地下管线信息对城市的建设发展至关重要,管线剖面图能直观地反应地下管线位置和管线与地物之间的相对关系.本文通过EXCEL和南方CASS软件的特点介绍了一种绘制地下管线剖面图的方法,通过实践此方法得到了验证,在地下管线绘制工作中取得很好的效果.     

基于校园的地下管线探测方法的研究

本文以吉林建筑大学校园地下管线探测为例,利用雷迪地下管线探测仪,进行校园的管线数据采集,在分析了地下管线的探测方法的基础上,完成了校园地下管线资料探测、测量、调绘、数据处理、管线图编及建立地下管线信息系统等工作。为以后的数字化校园建设提供部分参考依据。     

地下空间管理中有关管线竣工测量的分析

地下管线是城市建设的基础设施,在城市建设发展中起着十分重要的作用。为了能够保证地下安全,需要做好地下空间管线管理,特别是要做好管线的测量工作。文章立足当前地下管线规划管理实际情况,就地下空间管理中的管线竣工测量问题进行探究。     

基于无人机的管线巡检方案

管线具有总里程长、安全事件和事故多发的特点。因受到长期或超期服役而导致本体强度等力学性能下降以及户外环境腐蚀、自然灾害、地震损毁、人为破坏等各种不确定因素的影响,管线面临巨大安全隐患。一旦发生管线石油/燃气泄漏,引发火灾或爆炸事故,将严重影响到整个管线的正常运行,还可能危及周边人群的生命和财产安全。因此,十分需要加强管线的安全巡护管理,及早预警管线附近的人员异常行为和可疑车辆,并对已经出现的管线损坏等情况尽快报警,在水灾、火灾等灾害发生时,及早对灾害现场的管线进行巡查和受灾评估。     

刍议通信管线搬迁施工技术

以广东某项目中的通信管线搬迁施工为例,简要分析通信管线搬迁的意义,重点强调通信管线搬迁原则,并以通信管线搬迁施工技术为切入点,对路线规划和勘察、测量放线、掘进和开挖、管线安装和连接、现场安全和管理以及测试与验收等方面展开研究,期望能够为相关人员提供参考。     

一种内置网络资源数据的的通信管线绘图工具的开发应用

【】：本文分析中国移动通信管线资源数据集中化管理工作现状和问题,提出开发一种内置网络资源数据的通信管线绘图工具,其应用不仅可以规范CAD制图、提高制图智能性,还可以进行管线资源数据的归集,支撑管线网络 “哑”资源数据的集中化管理,建立一种以CAD图纸文件为载体,在设计、施工、运维等环节及时更新和归集管线资源数据的工作模式,帮助提升管线网络资源数据的集中化管理水平。     

2014年北京国际地下管线展览会将于11月在京隆重召开

由中国城市规划协会地下管线专业委员会和商务部经济技术交流中心主办,由国际管线专业学会、中国城镇供水排水协会、中国城市燃气协会、国际非开挖协会、石油化工行业地下管线技术委员会、中国仪器仪表学会自动化分会（《办公自动化》杂志）等单位协助组织的“2014年北京国际地下管线展览会”（下称管线展）。     

管线长距离输送天然气的闭环控制模型研究

采用管线进行天然气输送是天然气运输的主要方式,天然气管线输送控制是西气东输工程关键技术问题.传统的管线长距离输送天然气的控制模型采用模糊PID控制方法,当天然气管线传输节点出现自相关特征互扰时,对天然气输送的控制精度不高.提出一种基于自适应渐进约束加权闭环控制的管线长距离输送天然气控制模型.构建管线长距离输送天然气控制的控制对象模型,进行控制约束参量分析和控制目标函数构建,构建了多输入输出的天然气管线负荷的时间序列信号模型,在天然气流量的特征子空间中,采用闭环反馈校正方法实现管线长距离输送天然气的闭环控制算法改进.仿真结果表明,采用该控制模型进行天然气在管线中的长距离调度和传输,具有较好的控制精度,天然气输送的传递误差收敛到零,提高了天然气储运效率与安全性.     

地下管线数据自动化成图技术研究

为实现实测地下管线数据自动成图,避免传统人工成图方法费时、费力、易出错等弊端,文章在AUTOCAD平台上进行二次开发,运用Autolisp语言编写了地下管线数据自动成图软件。为验证软件的有效性,运用本软件对某高校校园内部分地下管线数据进行了自动成图试验,结果表明本软件不仅能够对不同种类地下管线数据进行分别自动成图,且可以实时显示管线点的埋深数据,可用于地下管线图绘制。     

基于GIS的集约化信息管线管理平台设计与实现

通信管线具有相当强的地域性和空间性,并且有着复杂的空间拓扑关系。鉴于通信管线的这些特点,从通信资源管理面临的实际问题出发,结合当前GIS的应用特点,将管线资源管理与地理信息系统结合起来,设计了通信管线资源管理集约化公共平台。平台采用基于GIS工具软件的二次集成方式开发管线资源管理系统,对相关数据进行综合分析处理。     

广告软件和间谍软件的危害与防治

广告软件和间谍软件是在网络中收集用户信息的软件，通常它们潜伏在用户的计算机中并将收集的信息发回后台服务器。广告软件和间谍软件对计算机网络安全和用户隐私构成了极大威胁。本文探讨了广告软件和间谍软件的定义、危害、传播途径，并对预防和清除它们提出了建议。     

支持冗余和兼容设计的智能建筑综合管理系统

为推动城市智能建筑管理新技术的开发和应用,针对工程实际问题,提出了一种支持冗余和兼容设计的城市智能建筑综合管理系统的设计方案.系统设计内容包括为楼宇控制、照明控制和停车引导控制设计的同一架构的CPU模块及软件、通信网关模块及软件、集中控制模块及软件、I/O模块及软件、无线模块、超声波检测模块及内部总线等,并阐述和分析了总线冗余、设备兼容性和集成监控软件等系统关键技术.系统具有先进的分布式系统、开放的网络化通信和标准化程序设计等多项新特性,可以显著提升大型城市建筑的智能化和节能管理水平.     

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。     

网络制播环境下广告节目播出的新思路

结合南京广播电视集团的实际情况,从送播流程、焊接播出和网络化下载等几个方面介绍了电视广告生产和播出上的一些新技术,对广告节目的高标清同播方式也进行了探讨。这些技术改进已实际运用在南京广播电视集团广告节目的生产播出中,并发挥了应有的作用。     

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。     

Hardware implementation of HEVC CABAC binarization/de-binarization

High efficiency video coding (HEVC) video codec applies different techniques in order to achieve high compression ratios and video quality that supports real-time applications. One of the critical techniques in HEVC is the Context adaptive Binary Arithmetic Coding (CABAC) which is type of entropy coding. CABAC comes at the cost of increased computational complexity, especially for parallelization and pipeline of these blocks: binarization, context modeling and binary arithmetic encoding. The Binarization (BZ) and de-Binarization (DBZ) methods are considered as important techniques in HEVC CABAC encoder and decoder respectively. Indeed, an important goal is to get high throughput in hardware architectures of CABAC BZ and DBZ in order to achieve high resolution applications. This work is the only one found on recent literature which focuses on design and implementation of full BZ and full DBZ compatible with H.265 and H.264. Consequently, a hardware architectures of BZ and DBZ are designed and implemented by using VHDL language, targeted an FPGA virtex4 xc4vsx25-12ff668 board and emulated with ModelSim. As a result, the implementation of BZ and DBZ can process 2 bins/cycle for each syntax element when operated at 697.83 MHz and 789.26 MHz, respectively. The proposed designs exhibits an improved high-throughput of 1395.66 Mbins/s for BZ and 1578.52 Mbins/s for the DBZ. The obtained Area Efficiencies in our proposed BZ and DBZ are about 0.544 Mbins/s/slices and 0.606 Mbins/s/slices, respectively, and it is better than many recent works.     

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.     

化合物半导体器件与电路的研究进展

介绍了GaAs,InP和GaN等几种重要化合物半导体电子器件的特点、应用和发展前景。回顾了GaAs,InP和GaN材料的材料特性及其器件发展历程与现状。分别讨论了GaAs基HEMT由PHEMT渐变为MHEMT结构和性能的变化,GaAs基HBT在不同电路应用中器件的特性,InP基HEMT与HBT的器件结构及工作特性,GaN基HEMT与HBT的器件特性参数。总体而言,化合物半导体器件与电路在高功率和高频电子器件方面发展较快,GaAs,InP和GaN材料所制得的各种器件电路工作在不同的频率波段,其在相关领域发展潜力巨大。     

空间互联网技术发展现状及趋势

空间互联网技术是人类进行航天测控、导航定位、远洋航行等空间应用的基础支撑,是实现全球互联互通的关键手段。首先介绍了空间互联网的概念及内涵、组成及结构、特点及优势等相关基础知识,接着总结了空间互联网的关键技术,然后阐述了空间互联网的发展现状和面临的问题,最后结合互联网技术发展趋势和航天应用的发展要求,对空间互联网技术的发展趋势进行了展望和预测。     

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。