智能小区控制系统设计及实施

介绍了智能小区控制系统的具体组成,以某智能小区控制系统为例,详细地描述了系统设计方法,并对系统各个组成部分的构成及功能进行了阐述。指出智能化的住宅小区将是今后主要的发展趋势。     

宝钢工业视频监控系统应用与展望

分析了宝钢1—3期工业视频监控设备的系统构成、技术特点及应用情况,介绍了视频监控新技术及其在宝钢的应用前景,为钢铁企业的视频监控系统设计提供了可借鉴的经验。     

迷狂的北京

基于解读库哈斯的城市理论和北京城市现状,本文肯定OMA的CCTV方案在当前城市经济条件下的有效性,又对它的城市历史正统性和建筑学恒久价值提出疑虑。     

龙潭水库坝下输水涵管渗漏检查及原因分析

采用管道CCTV检测技术;在龙潭水库放空库容2周后和1个月后两次检查坝下输水涵管;查明涵管结构缺陷、渗漏情况以及渗漏原因和渗漏水来源;为工程后期除险加固提供指导和依据;并为类似工程提供参考。     

电视监控在提升系统中的应用

通过阐述电视监控系统的原理及配置形式,以电视监控技术在提升系统中的应用实例,证明了电视监控技术在提升系统中的实用性,具有广阔的使用前景。     

A Computer Modeling of the China Central Television Headquarters in Beijing

This paper deals with the computer modeling of structures starting from a point cloud. The CCTV （China Central Television） tower headquarters is the case for study because the shape of this building is non-stellar, concave and multi-connected. It is composed of sowns and chains. The sown is the representation of a horizontal plane formed by dense points. The chain is a planar path modeled by rare points. The CCTV structure is defined only by the three orthogonal Cartesian coordinates of the points. The proposed computer modeling uses a sequence of procedures and the desired outputted 3D model is consistent. The first procedure is devoted to attributing points to their voxel and to estimating three values needed afterwards. The second procedure is devoted to analyzing clusters vertically and horizontally, to preliminarily distinguishing chains from sowns and to generating relational matching. The third procedure is devoted to building closed paths between all chains and all their projections on sowns. The fourth procedure is devoted to connecting points with triangles. The fifth procedure, still being implemented, is devoted to interpolating triangles with triangular splines. The results show it is possible to achieve the 3D model using the above mentioned procedures. These procedures are written, implemented and tested and they form a library of people＇s own software. The code is written using Matlab. It is not possible to obtain the required 3D model if the procedures are applied in the wrong order or one step is skipped. To conclude, it is possible to obtain the computer model of the CCTV using the provided sequence of procedures.     

污水处理厂CCTV监控及综合布线系统设计

介绍了污水厂CCTV监控系统及综合布线系统的特点及其设计要点。运行效果表明，CCTV监控系统可实现全厂生产区域重要设备及现场的监控，便于中控室值班人员及时发现现场问题、排除故障、保证生产的正常进行及实现厂区四周围墙及大门的安全防范；综合布线系统可便于实现污水厂日常的生产管理及办公系统的自动化，将所有的监控及管理计算机连成一个局域网并通过Intranet与外部相连，可大大提高劳动生产率、降低生产成本，取得了良好的经济效益和社会效益。     

CCTV技术在马尾快安片区排水管道整治中应用

CCTV(管道闭路电视内窥检测)技术应用于排水管道管理和养护,能发挥巨大辅助决策作用。     

火力发电厂闭路电视监视系统设计

数字闭路电视监视系统能实时、形象、真实地反映被监视控制对象的画面,是现代化管理中监控的一种极为有效的监视工具,目前已广泛应用于发电厂、工矿企业的现场监控及厂区无人值守监控,详细介绍了全厂数字闭路电视监视系统在发电厂中设计应用。     

Finite element-based analyses of natural frequencies of long tapered hollow steel poles

Long tapered poles are commonly used to support Closed Circuit Television Cameras (CCTV) for security and traffic monitoring. Images received from CCTV are normally distorted due to the camera’s wind-induced vibration. To minimize the vibration experienced by the CCTV through development of a damping device to be placed at the interface between the pole and the camera, identification of the poles’ different frequencies as functions of poles’ geometric variables is essential. Thus, this study presents the development of natural frequency equations for long tapered hollow poles as functions of their geometric variables based on three-dimensional finite element model (FEM) analyses by taking into account the couplings between material, contact and geometric nonlinearities. The FEM results are compared and verified with the experimental data obtained from the instrumentation of a 60 ft pole. Sensitivity study is performed to identify the effect of different geometric parameters on the overall natural frequencies of the pole. Using the results from the parametric study, empirical formulae between the geometric parameters and the first, second and third mode natural frequencies for the long tapered hollow steel poles are obtained.