基于OpenGVS的消防预案仿真系统

采用专门用于实时3D图形开发的视景管理软件OpenGVS,结合面向对象技术开发出三维消防预案仿真系统,对视点方式的规划方法、碰撞检测和路径规划算法等关键问题进行阐述．实验表明所开发的视景仿真系统具有良好的实时性和交互性．     

Spectral indices and fire behavior simulation for fire risk assessment in savanna ecosystems

The lack of information on the vegetation status before the use of fire as a management tool in protected areas leads to drastic destruction of the natural vegetation and biodiversity. This paper describes the use of spectral indices and simulation of savanna burning to assess risk of intensive fire propagation in a National Park (Niokolo Koba, Senegal, West Africa). Spectral parameters corresponding to thematic information (wetness, brightness, and greenness) were retrieved using an orthogonal transformation, the Tasseled Cap approach on LANDSAT-ETM images. Wetness and brightness indices were normalized (σ=1 and mean=0) and then combined in a simple semi-empirical algorithm of fire risk levels discrimination. These two indices are proven to reflect qualitatively both fuel moisture and its distribution, which constitute the most foreseen determinants of fire propagation in savanna areas. The fire risk assessment algorithm (FIRA algorithm) was used to produce a fire risk map at the beginning of the management fire implement period. In parallel, a fire area simulator (FARSITE) developed by USDA was used with randomly spaced fire sources to determine areas which can be potentially burned in the study site. These simulated burned areas and the FIRA algorithm results were cross-compared to a real fire scars dated at the end of the same burning period and to land cover map. A great consistency was found between the different sources of information. More than 85% of fire prone areas identified by the FIRA algorithm or simulated by FARSITE were located in trees-shrub, woodland, and shrub savannas. These cover types included also 95% of real fire scars. Almost 88% and 84% of real fire scars were found in the risk zones determined by the FIRA algorithm and the simulated burned areas by FARSITE, respectively. The method used is simple and suited for an operational use for management fire implementation in savanna ecosystems.     

仿真排队系统的统计计算研究

通过C 语言来仿真排队系统,该系统的数学模型为M／M／m/模型。然后用统计计算的方法来分析和研究仿真得到的数据,从而得出该系统的统计分布规律。     

基于CC2530古建筑无线火灾监测系统的设计

传统的古建筑火灾监测体系采用有线网络的方式,存在许多弊端。为了解决这个问题,结合无线传感器网络技术,基于CC2530芯片,针对古建筑的建筑特点和环境参数需求,设计实现了适合古建筑的火灾监测系统。硬件部分设计了传感节点,软件部分设计了系统的路由策略。系统中传感节点通过无线模块将自身的温度、光强和气体信息送到协调器节点,协调器节点将收集到的数据通过串口送到监控主机,在监控主机软件上显示出来。监控主机可以通过通信网络将这些数据送到安卓系统的手机以便于监控人员随时了解情况。     

Designing a FORTRAN based system for meteorological statistics

The problems of achieving efficiency in middle weight computation are discussed with reference to experience in the Meteorological Office with the operational and research computations which support work on long range weather forecasting. An account is given of the reasoning behind the latest form of the METOCODE system, and of the objectives it is intended to fulfil.     

A model for physics-based fire simulation and analysis

Virtual Reality - This paper describes the development of a three-dimensional (3D) physics-based fire simulation model that employs the incompressible Navier–Stokes equations to realistically...     

An intelligent system for forest fire risk prediction and fire fighting management in Galicia

Over the last two decades in southern Europe, more than 10 million hectares of forest have been damaged by fire. Due to the costs and complications of fire-fighting a number of technical developments in the field have been appeared in recent years. This paper describes a system developed for the region of Galicia in NW Spain, one of the regions of Europe most affected by fires. This system fulfills three main aims: it acts as a preventive tool by predicting forest fire risks, it backs up the forest fire monitoring and extinction phase, and it assists in planning the recuperation of the burned areas. The forest fire prediction model is based on a neural network whose output is classified into four symbolic risk categories, obtaining an accuracy of 0.789. The other two main tasks are carried out by a knowledge-based system developed following the CommonKADS methodology. Currently we are working on the trail of the system in a controlled real environment. This will provide results on real behaviour that can be used to fine-tune the system to the point where it is considered suitable for installation in a real application environment.     

基于Vega的消防报警控制系统的仿真

用计算机仿真技术来指导建筑物突发事件中人员疏散是一种有效的手段，消防报警控制系统是突发事件虚拟场景中的重要组成部分。本文通过模拟火灾发生的情景，并结合消防报警控制系统的仿真实例介绍了基于Vega的虚拟现实技术在突发事件视景仿真中的应用方法和实现的关键技术，并取得了较好的仿真效果。     

A multi-document summarization system based on statistics and linguistic treatment

The massive quantity of data available today in the Internet has reached such a huge volume that it has become humanly unfeasible to efficiently sieve useful information from it. One solution to this problem is offered by using text summarization techniques. Text summarization, the process of automatically creating a shorter version of one or more text documents, is an important way of finding relevant information in large text libraries or in the Internet. This paper presents a multi-document summarization system that concisely extracts the main aspects of a set of documents, trying to avoid the typical problems of this type of summarization: information redundancy and diversity. Such a purpose is achieved through a new sentence clustering algorithm based on a graph model that makes use of statistic similarities and linguistic treatment. The DUC 2002 dataset was used to assess the performance of the proposed system, surpassing DUC competitors by a 50% margin of f-measure, in the best case.     

基于Agent的森林火灾系统建模仿真

为研究森林火灾系统的整体发展态势及演化规律,引入面向模式的基于Agent的建模方法,进行了融合自然、社会微观作用机理的计算机仿真研究,以Agent元模型为软件实现基础建立起森林火灾系统模型,有机融合了林火蔓延的元胞自动机模式和协作扑救的网络协作模式.对森林火灾系统模型进行动态仿真实验,实验结果表明了有关模式对系统态势发展的影响,以及基于Agent的建模方法对森林火灾系统研究的有效性.     

火焰动画快速模拟的新方法

针对火焰动画难以快速建模和绘制的问题,提出了完全利用GPU过程化生成火焰动画的高效算法。先用建模工具在预处理阶段构建一个由平面正方形组成的三维模型,在绘制阶段通过GPU编程对这些方形进行Billboard方式的变换,并用一些简单公式对他们的运动方式、大小和颜色来用过程化方式进行控制,最后通过alpha混合得到最终结果。算法完全在GPU里实现,能满足实时的绘制要求。     

一个基于模式的快速查询构建系统

介绍了如何设计和实现一个基于模式的J2EE快速查询生成系统。系统主要有两种角色的使用人员,设计人员与用户。系统让设计人员定义面向用户的数据库信息,包括表、表的字段及其显示风格;系统允许用户从已设计好的界面模式中选择自己喜欢的界面风格,在用户定制完自己的查询内容后,系统采用广度优先搜索来判断查询的合理性,并用最短路径算法优化查询。系统极大地简化了基于Web的查询系统的开发和维护。     

Multisensor based security robot system for intelligent building

Intelligent building can provide safety, convenience, efficiency and entertainment for life in the 21st century. The most importance role of the intelligent building is the security system. We develop a multi sensor-based intelligent security robot (ISR) that is widely employed in intelligent buildings. The intelligent security robot can detect abnormal and dangerous situations and notify users. The robot has the shape of cylinder and its diameter, height, and weight are 50 cm, 130 cm and 100 kg respectively. The function of the ISR contains six parts. There is the software development system; avoiding obstacle and motion planning system, image system, sensor system, remote supervise system and other systems. We develop a multi sensor-based sensor system in the ISR. We use multiple multisensor fusion algorithms to get an exact decision in the detection subsystem of the sensor system. There is an adaptive fusion method, a rule based method, and a statistical signal method. We demonstrate the remote supervisory system to control the ISR using a direct control mode and a behavior control mode. We think that the man–machine interface in a security robot system must have mobility and convenience. Therefore, we use a touch screen to display the system state, and design a general user interface (GUI) to service the user and visitors. The user can remotely control the appliance using a cell phone through a GSM modem, too. The appliance module can feedback reaction results to the user through a cell phone. Finally, we implement the fire detection system in the intelligent security robot (Chung-Cheng-I). If a fire occurs, the intelligent security robot can find out the fire source using the fire detection system. In intruder detection, we program the same scenario to detect the intruder using the intelligent security robot. The intelligent security robot transmits the message of the detection result to the user using a GSM modem for a fire event or intruder, and transmits the detection result to a client computer through the internet.     

一种基于CAN总线的集散型火灾报警控制系统

提出了一种基于CAN总线的集散型火灾报警控制系统的设计方案,系统以AT89C51单片机为节点控制器,MCP2510为总线控制器,MCP2551为总线收发器。文章主要介绍了AT89C51与MCP2510的SPI接口实现方法,以及MCP2510的初始化方法。     

基于DSP的多功能汽车防撞雷达的设计

本系统基于C6000系列DSP的实时操作系统DSP/BIOS的多线程多任务管理,对前视雷达和后视雷达的接收信号同时进行实时处理,是集车载前视雷达、后视雷达、倒车雷达的功能于一体的多功能汽车防撞雷达.在软件方面,利用AR模型功率谱估计的burg算法、MTD-上下扫频相互匹配法对接收到的中频信号进行处理,提高了信噪比和信号处理的准确度,更好地解决多目标问题,降低虚报警、漏报警率.     

基于地理信息系统的森林火灾自动识别

运用图像处理、模式识别和地理信息系统(GIS)技术进行森林火灾自动判别,在GIS中自动识别并定位火点.当识别为疑似火情时自动锁定云台并进行防火报警.通过数字云台传回的方位角和俯仰角数据与防火地理信息系统进行连接,计算森林火灾发生的具体位置并进行火点空间定位以辅助森林防火指挥决策.     

基于ZigBee的森林火灾监控报警系统

为实现低成本森林远程火灾自动报警,设计了一套基于ZigBee、GPRS和太阳能光伏的森林火灾监控报警系统。以CC2430为节点控制传感器采集图像和数据,本地通信时,数据通过ZigBee无线传感网络实现整片森林之间的通信,ZigBee节点间采用网状网络的自组网方式;远程通信时,协调器将处理好的数据通过GPRS技术传到监控中心以实现数据的显示和存储等;出现异常情况时,监控中心开启自动报警系统。系统采用太阳能供电,节约能源、减少布线。实验结果表明,该系统能够快速准确监控远程实时状况,并控制远程协调器,实现自动监控、报警功能,具有广泛的应用前景。     

基于AT89S52单片机的烟道火灾探测系统设计

以温度作为主要探测参数,采用热电偶为感温元件,AT89S52单片机为控制核心,设计了一种针对餐饮业厨房烟道火灾的探测系统.该系统通过热重法和模拟火灾实验相结合.确定了烟道火灾报警、灭火温度阈值,并可实现烟道火灾自动探测、报警、灭火联动等功能.     

A decision support system for paper making based on simulation and optimization

In this paper a model-driven decision support system related to paper making is introduced. The intention is to emphasize the necessity of coupling different modeling techniques, multiobjective optimization, and software engineering in order to make the end user application realistic, practical and usable. Firstly the paper making process and selected aspects concerning its mathematical modeling, numerical simulation, and multiobjective optimization are introduced, then the related computerized system, called a virtual paper making line, is described. In addition, the associated decision support system, which provides a suitable level of automation to improve the quality of decision making and support the user’s expertise is discussed. Finally, an example presents different ways of using such a software tool.