基于嵌入式DVR/DVS的网络视频监控系统的研究和实现

介绍视频监控系统的基本概念、发展及应用.研究分布式系统架构技术,运用VC 编程实现了C/S(客户端/服务器)模式下基于H.264嵌入式DVR/DVS(数字硬盘录像机/数字视频服务器)的带电子地图导航的网络视频监控系统.     

多媒体图象监控的一种实现

在介绍一多媒体图像监控系统结构的基础上，介绍了面向对象技术的监控软件的实现，包括视频图像处理、声音处理、电子地图处理等。     

公安与商网视频音频报警一体化系统研究

系统分为视频音频报警采集、设备管理服务和报警监控管理中心三个子系统,从而实现了视频、音频、报警三位一体。系统前端为视频音频报警采集系统;设备管理服务系统包括权限验证服务器、总控服务器和应用服务器等;报警监控管理中心系统实现报警视频和音频接入展示、报警记录查询、报警点电子地图浏览、实时视频播放、录像视频回放等功能。     

基于GIS的视频监控系统研究

为解决传统的视频监控系统空间位置感不强的问题,对目前GIS技术和视频监控技术进行了研究,提出了GIS技术和视频监控技术相结合的解决方案,实现了通过GIS显示监控点空间布局的功能。通过对GIS上实时显示监控点技术的研究,建立了一个电子地图与视频联动的模型。以.NET Framework和SQL Server为平台,把GIS技术与视频监控技术两者融合起来。讨论了基于GIS的视频监控系统的功能特点,阐述了其整体架构的设计以及实现该系统涉及的关键技术和难点。     

基于视频巡航的九寨沟智慧景区管理与服务

为解决常规视频监控系统空间定位差和与业务管理系统耦合度不高的问题,针对智慧景区建设和管理对视频监控的需求,结合GIS与消息传递机制等技术,设计并实现了视频巡航功能系统。该系统建立了电子地图与摄像头的联动关系,设计了摄像头编组及自动巡航功能,并跟景区智能化管理业务紧密结合,实现了视频立案。目前该系统在九寨沟智慧景区管理中得到应用,取得了较好的实用效果。     

基于DVR/DVS的分布式视频安全监控系统的设计与实现

通过对分布式系统架构技术的研究,建立了基于DVR/DVS(数字硬盘录像机/数字视频服务器)的C/S(客户端/服务器)和B/S(浏览器/服务器)模式下的视频安全监控系统模型。并运用VC++编程实现了基于H.264视频编解码技术的带电子地图导航的视频安全监控。     

关于网络视频监控系统的几种应用模式

本文通过对视频监控系统主要技术的应用情况分析,详细阐述了网络视频监控设备数字化接入的方法和网络视频监控系统的几种应用模式,希望对网络视频监控系统方案设计和用户了解选择网络视频监控系统有所帮助。     

支持无线网络的实时视频监控系统设计

为了解决有线网络视频监控的布线问题和工作人员的移动化监控问题,设计并实现了一种支持IP摄像头、DVR、3G手机作为视频数据采集前端,兼容H.264和MPEG4等编码标准和支持PC和3G手机进行客户端监看的实时视频监控系统,该系统实现视频的采集、压缩、传输、解码、显示、控制、录像、事件通知、电子地图等功能,该系统支持前端采集设备的多流输出和高并发访问,适应了3G手机的带宽,提高了服务器使用效率,达到了利用手机进行移动视频监控的目的。     

某培训中心视频监控及防盗报警系统设计方案

本方案根据培训中心的实际需求,进行安全技术防范系统的设计。本系统包括视频监控及防盗报警两个子系统,两个子系统采用一台多媒体管理主机进行控制。视频监控采用电视墙进行图像矩阵切换,采用硬盘录像。系统可进行报警联动切换图像、报警联动录像、报警电子地图显示等功能。     

电子地图在多媒体监控系统中的应用

首先阐述多媒体监控系统中电子地图的概念,分析电子地图在Web化多媒体监控系统中的应用。然后基于组件技术提出多媒体监控系统中Web服务器端和Web浏览端的电子地图软件结构,并设计了电子地图的三部分组件一编辑组件、发布组件和浏览组件。     

基于拓扑结构的地图匹配算法研究

随着GPS定位技术的日益推广,GPS技术被大量应用于各种导航系统中。但由于GPS系统存在一定的定位误差,那么如何向用户提供实时、准确的车辆位置信息成了导航系统的重点和难点。通过利用软件纠偏的方法对车辆的定位数据与电子地图数据进行配准纠正,即地图匹配,来减小电子地图的道路信息和GPS定位信息间的显示误差。该方法已应用于实际的工程应用,并取得了良好的效果。     

基于Qt/Embedded的嵌入式导航电子地图实现

以杭州市MapInfo格式的桌面电子地图文件为数据来源,从中提取电子地图数据并根据需要对数据进行了裁减,针对嵌入式系统的特点选用合适的数据结构来组织数据;数据经地图投影、坐标转换后,在Linux操作系统下,以Qt/Embedded为开发环境,实现了一种方便、经济的嵌入式导航电子地图;最后,在宿主机(PC机)的qvfb(vitural framebuffer)里显示了实现的杭州市电子地图;实验结果表明,该地图具有放缩、漫游等功能,很适合应用在城市路径规划,车辆导航,城市应急系统等方面,且开发成本低,具有良好的推广应用价值。     

VB图象处理技术在房产管理系统中的应用

介绍了一个自己开发的以电子地图取代了纸地图 ,以数据库取代了档案袋 ,可以用电脑选房购房和做房地产经营的系统。解决了系统开发时遇到的地图显示、查询和定位等关键技术问题。将VB图象处理技术用于房产管理中还是比较先进的。     

Mapping spatio-temporal changes of Chinese electric power consumption using night-time imagery

China's rapid economic development in the last 20 years has resulted in increased demand for electricity and ensuing shortages in electric power supply. It is necessary to derive accurate and timely information regarding changing spatio-temporal patterns and trends of electric power consumption to inform future electricity allocation. Night-time annual image composites for 1995–2005 were obtained from the Defense Meteorological Satellite Program's Operational Linescan System and were inter-calibrated. The inter-calibrated night-time image composites were used in conjunction with the LandScan 2008 population data to estimate the amounts of electric power consumption in 1995, 2000 and 2005 for China at the province level. The estimated amounts of electric power consumption were then disaggregated to the pixel level. A pixel-based map was produced to show the spatio-temporal changes of electric power consumption from 1995 to 2005, in which 11 regional agglomerations with large increases of electric power consumption had emerged. During the process of producing this spatio-temporal change map, some errors were generated because of the use of single-year LandScan population data, imperfect reference regions for inter-calibration and a single threshold value for delimiting urban areas. However, we believe these errors are limited and acceptable, so we present this method of estimation and disaggregation to show the increases in electric consumption.     

A Hierarchical Self-Organizing Map Model in Short-Term Load Forecasting

This paper proposes a novel neural model to the problem of short-term load forecasting. The neural model is made up of two self-organizing map nets – one on top of the other. It has been successfully applied to domains in which the context information given by former events plays a primary role. The model was trained and assessed on load data extracted from a Brazilian electric utility. It was required to predict once every hour the electric load during the next 24 hours. The paper presents the results, and evaluates them.     

基于遗传算法的BP网络在小电流接地选线中的应用

小电流接地系统发生单相接地故障时,系统电气量与接地故障线路(或母线)存在映射关系。利用基于遗传算法的BP网络来描述这种映射关系,实现确定接地故障线路(或母线)。测试结果表明,方法快速、准确,具有一定的实用价值。     

Real-time autonomous navigation of an electric wheelchair in large-scale urban area with 3D map*

This paper presents the real-time autonomous navigation of an electric wheelchair in a large-scale urban area. Accurate self-pose localization and well-chosen motion control are crucial for application to urban areas, as electric wheelchairs move on paved roads in dynamic environments and travel along sidewalks at a brisk speed. Our system is equipped with a localization module based on a 3D map and a path planning module based on a navigation map. However, the large-scale 3D map causes a high memory load, and the embedded PC can not deal with the map data. In addition, the large-scale navigation map increases the computational cost of path planning, which causes delays in navigation. To achieve real-time navigation independent of map size, we propose a 6-DoF pose localization switching reference 3D map and a two-step path planning framework. We ran tests by using an electric wheelchair on a real street in Tokyo and found that the proposed navigation system achieved autonomous navigation for over 8.8?km in about 133 minutes. The experimental results showed that the memory load was kept constant and the path planning was performed at high frequency, regardless of the size of the map or the distance to the destination.     

A hierarchical neural model in short-term load forecasting

This paper proposes a novel neural model to the problem of short-term load forecasting (STLF). The neural model is made up of two self-organizing map (SOM) nets—one on top of the other. It has been successfully applied to domains in which the context information given by former events plays a primary role. The model was trained on load data extracted from a Brazilian electric utility, and compared to a multilayer perceptron (MLP) load forecaster. It was required to predict once every hour the electric load during the next 24 h. The paper presents the results, the conclusions, and points out some directions for future work.     

基于J2ME的手机室内导航系统

随着GPS全球定位系统技术快速发展,以及数字地图应用的普及,手机导航系统得到了快速的发展。但当前GPS导航大多应用于室外导航,室内导航是导航系统中相对空白的领域。该文结合手机定位与数字地图传送功能,对J2ME开发平台下基于手机室内导航系统进行了研究,提出了可行的解决方案。     

超声波在血液净化技术中的应用研究

介绍了一种应用于血液净化设备中血液体外循环回路安全监控环节的超声波气泡监测传感器,简述超声波及其检测电路上作原理,并对其结构特性作了说明。对传感器在血液净化技术中的临床应用原理、工作条件和安全监测功能进行了深入的分析,给出了详细的电路原理图。采用嵌入式微控制器及其集成A／D转换信号处理功能,结合设备临床操作与应用情况,提出白适应算法来自动确立报警阈值,克服了环境温度、现场操作等差异,有效的避免了误报和漏报现象。