苛办公组团CCTV系统的设计与分析

本文针对目前CCTV系统的发展及应用现状，结合在CCTV系统设计中遇到的若干问题，对某办公组团（尤其针对超高层建筑）CCTV系统在取点、传输、组网等环节进行了初步的探讨。     

“城市翻修”教学系列报告（四）：中央电视台新址改造设计

本文介绍了清华大学本科四年级城市设计课程专题“中央电视台新址改造设计”包括教学计划．教学重点．作业案例及教学启示等内容。     

CCTV主楼结构施工用塔式起重机选型和定位

根据塔式起重机选择定位原则--满足钢结构施工需要,对照起重能力和提升速度等指标,考虑现场起重机的协同作业和相互安装、拆卸关系等,CCTV主楼结构塔楼1和塔楼2分别采用1台M1280D和1台M600D动臂式塔式起重机;裙房采用2台M440D动臂式和1台C70/50B塔式起重机.通过对塔楼M1280D动臂式塔式起重机起重性能与施工现场各半径范围内最重构件的比较分析,指出各起重机均能发挥各自起吊能力,且覆盖施工吊装区域内所有构件.     

The classification of vigilance tasks in the real world

The ability to generalise vigilance research to operational environments has been questioned, largely due to differences between laboratory research and real-world settings. The taxonomy of vigilance tasks proposed by Parasuraman and Davies (1977 Parasuraman, R. and Davies, D. R. 1977. “A taxonomic analysis of vigilance performance”. In Vigilance: Theory, operational performance, and physiological correlates, Edited by: Mackie, R. R. 559–574. New York: Plenum. [Crossref] , [Google Scholar]) represents an attempt to classify vigilance tasks so that tasks with similar information-processing demands can be compared and the ability to generalise results enhanced. Although the taxonomy originally included complexity, the term specifically referred to multiple sources of information. Complexity has been overlooked in much of the traditional vigilance literature, although it is included in more recent studies of jobs such as air traffic control. In this paper, the taxonomy is evaluated in relation to two vigilance intensive jobs – closed circuit television surveillance operators and air traffic controllers. In its present form, the existing taxonomy of experimental settings has limited applicability to these operational settings. Therefore, recommendations for expanding the taxonomy to include more aspects of complexity are made. It is argued that the revised taxonomy be used in conjunction with situation awareness, which makes provision for the cognitive processes involved in these jobs.     

电厂辅控网和视频监控网两网合一的探讨

全厂辅控网和CCTV视频监视系统在电厂广泛应用，各自采用独立的网络传输数据和视频信号，不但增加了设备的投资和网络建设费用，而且不利于全厂辅助车间监控网络的结构优化，因此提出将全厂辅控网和CCTV视频监控网两网合一，本文分析了两网合一的关键问题和解决办法，通过论述认为两网合一是可行和可靠的。     

Automated diagnosis of sewer pipe defects based on machine learning approaches

In sewage rehabilitation planning, closed circuit television (CCTV) systems are the widely used inspection tools in assessing sewage structural conditions for non man entry pipes. Currently, the assessment of sewage structural conditions by manually interpretation on CCTV images seems inefficient, especially for several thousands of frames in one inspection plan. Also, the assessment work significantly involves engineers’ eye sight and professional experience. With a purpose of assisting general staffs in diagnosing pipe defects on CCTV inspection images, a diagnostic system by applying machine learning approaches is proposed in this paper. This research was first to use image process techniques, including wavelet transform and computation of co-occurrence matrices, for describing the textures of the pipe defects. Then, three neural network approaches, back-propagation neural network (BPN), radial basis network (RBN), and support vector machine (SVM), were adopted to classify pipe defect patterns, and their performances were compared and discussed. The diagnostic system of pipe defects was applied to a sewer system in the 9th district, Taichung City which is the largest city in middle Taiwan. The result shows that the diagnosis accuracy of 60% derived by SVM is the best and also better than the diagnosis accuracy of 57.4% derived by a Bayesian classifier.     

数字视频系统在奥林匹克中心区的应用

在奥林匹克中心区项目中，使用了美国Honeywell公司的HUS系列数字视频安防产品，该系统的成功应用也为安防行业中日益广泛应用的数字视频产品提供了新的案例。     

视频时间日期发生器

本文主要介绍由通用集成电路来产生时间日期数字信号和将其迭加在视频信号中的技术。     

广域监控系统VistaScape的崛起

VistaScape自2008年在中国安防市场诞生以来,在安防监控领域独树一帜,引领着整个行业的发展,凭借着其卓越的软体优势,悠久的出生背景,平易近人的硬件需求以及人性化的人机互动界面已经在航空航天、能源、军事、以及石油化工领域崭露头角。