城市应急救援指挥中心软件系统开发

本文所介绍的城市应急救援指挥系统是一个集数据库、数据通信和地理信息系统（GIS）为一体,并具有一定智能决策指挥功能的综合性集成软件。文中描述了系统的设计思想、主要功能和技术要点。该系统投入运行一年多时间,得到了用户的普遍好评。     

基于STK/X的战场模拟仿真系统

介绍了卫星工具包STK (Satellite Tool Kit)的主要功能及应用领域,深入研究了STK中的STK/X模块,将该模块同 VC2008相结合进行了应用程序的开发,把 STK 中的2D、3D 模块集成到了 VC 应用程序中,使得同STK/X 进行实时数据通信成为可能,并将其应用拓展到了军事战场模拟仿真中。总结分析了在现代化军事战争中将前方态势格局在后方指挥中心进行实时可视化展的可行性及面临的问题。     

XML在GIS开发中的框架应用探讨

随着地理信息系统的广泛应用,地理信息系统开发时的架构也面临着很多新问题。本文分析了传统开发模式下的系统存在的不足之处,然后从GIS数据管理及应用维护等多方面考虑,提出了基于XML在GIS中开发中的应用方法,来提高系统的可配置性和可扩展性,并结合实际应用的模型,证明了基于XML在GIS系统开发中的优点。     

面向对象地理信息系统软件ArcView的高级应用

本文着重探讨了面向对象地理信息系统软件包ArcView的使用和深入编程中的一些技巧，并给出了运用ArcView开发地理信息系统应用系统的几个实例。     

交通地理信息系统的类型、方法及应用初探

详细讨论了交通地理信息系统的类型、数据模型以及空间分析功能;结合中国西北地区的交通地理信息系统的具体开发实例,阐述了交通地理信息系统中弧段-结点拓扑关系、动态分段等原理,并探讨了多种查询手段的综合应用、道路里程桩号系统和道路描述系统等问题。     

社区公共设施地理信息系统设计与开发

介绍了将地理信息系统技术应用到社区公共设施管理中的方法，结合系统开发的实际经验，详细论述了社区公共设施地理信息系统的系统体系结构、开发技术、功能结构和数据库设计方法，并给出了原型系统的界面实例。     

基于INTERNET的网络地理信息系统开发

本文主要介绍了在ＩＮＴＥＲＮＥＴ上开发网络地理信息系统的方法，分析了系统的设计目标、网络结构、软硬件配置、系统自身的结构，提出了系统的开发包括建立地理数据库、地理信息系统、ｗｅｂｓｅｒｖｅｒ与地理信息系统服务器交互系统、系统的维护与安全等环节。     

应用型GIS的开发模式及其发展趋势

地理信息系统可分为工具型地理信息系统和应用型地理信息系统.应用型地理信息系统开发模式包括独立开发、单纯二次开发与集成二次开发三种模式.本文首先介绍应用型地理信息系统的开发过程,然后对其三种开发模式分别进行了论述,并对比分析它们不同的开发特点,最后探讨了应用型地理信息系统开发的发展趋势.     

基于API函数库实现串口数据通信的分析与设计

串口数据通信能够实现计算机与外部设备之间的数据传输,广泛应用于实时监控和工业自动化系统中,为此开发高效、快速、实用的串口数据通信系统尤为重要。从串口数据通信实现的过程出发,详细介绍了使用VB6.0的MSComm控件、使用SerialPort串口通讯类和调用API库中的通信函数三种方法实现串口数据通信的过程。并以农业生产蔬菜大棚自动杀虫灯数据采集分析程序为例,应用VS2012集成开发环境从基于API函数库实现串口数据通信系统的设计思路、打开串口和接收数据等通用类方法设计入手,实现了自动杀虫灯数据采集分析串口数据通信程序在VS2012中的设计。实验结果显示,在VS2012系统中采用API函数库实现的串口数据采集通信系统,编程效率较高、可移植性强,同时适合于对通信质量要求较高,传输距离较远的应用场合。     

基于GIS的森林防火信息系统的研究与开发

本文针对县林业局防火指挥中心的森林防火业务，探讨了使用基于ActiveX技术的地理信息系统平台实现森林防火信息系统的设计思想。     

基于数据源识别和驱动分析的软件系统测试方法

航天测控软件系统安全关键等级高,其质量直接决定航天任务成败,具有架构庞大、软件配置项多、内外接口复杂、数据传递路径长、处理实时性强等特点,软件系统测试的要求高且难度大,目前存在系统测试需求不清晰、测试针对性差等实际问题;航天测控软件系统是典型的数据驱动型软件系统,针对其特点,文章提出了一种基于数据源识别和数据流分析的软件系统测试方法,开展了数据源识别、数据流路径分析、数据状态分析和获取、系统级数据流顺序图生成等关键技术研究,给出了该方法的推荐工作流程;该方法已在多个航天测控中心软件系统测试中应用,实践表明,针对数据驱动型软件系统,该方法可以显著提高系统测试的设计有效性和测试效率。     

基于VPX总线的无线电指令收发测试系统设计

无线电指令收发单元作为导弹的重要弹上仪器,用于导弹制导控制,其内部组成与功能复杂,指标要求高,有必要研制无线电指令收发单元自动测试系统。基于VPX总线构建的自动测试系统,具有高带宽、高硬件密度以及高可靠性等特点,尤其适用于无线电通信设备的自动化测试。采用FPGA和ARM为核心设计VPX总线无线电测试模块,实现了无线电测试高实时性的设计要求,同时具有良好的通用性和扩展性,该设计能够推广到其他具有实时性测试和大容量数据处理要求的应用场合。     

导航信息组合中心高速通信链设计与实现

提出了实现导航信息组合中心高速通信的硬件架构方案和软件设计框架。设计了GPS时间同步系统，利用该系统分析研究了串口与网线通信的实时性与可靠性，并在某真航向测量系统中得到了应用。应用结果表明通信链在使用网线通信时，平均延时3ms，数据接收成功率达到99．9995％。     

The Military Computer Family: a New. Joint-Service Approach to Military Computer Acquisition

A new approach to developing and acquiring computers for the military has been under development over the past 2½ years by the Army's Electronics Command and the Navy's Air Systems Command. Known as the Military Computer Family Program, the joint effort now includes the Air Force's Electronic Systems Division and Rome Air Development Center (as observers). It is aimed at providing defense system developers with a software-compatible family of military computers that have extensive systems/support software. The various phases of the work being performed under the MCF Program are the subject of the principal articles in this issue. The overall objectives and major thrusts are summarized below.     

Experiences with CMS2-to-Ada translation tools

This paper describes experiences with three CMS-2 to Ada language translators. It describes the evolution of an effort whose initial goal was trial usage of a single translator, into an effort which ultimately used three translators and made some comparisons of their outputs.The following points represent key findings and conclusions from these experiences. All three of the translator tools successfully generated Ada source code. However, further evaluations would be beneficial. Translation will be useful to systems and software engineers as a part of an overall transition scheme.This paper describes experiences by personnel from the Naval Surface Warfare Center, Dahlgren Division (NSWCDD) and their support contractor CSC. The work was supported by the organizations that developed the translators: Computer Command and Control Company (CCCC), Johns Hopkins University/Applied Physics Laboratory (JHU/APL), and the Navy Command, Control, and Ocean Surveillance Center (NCCOSC) Research and Development Division (NRaD).Translator operation data were collected and reviewed to develop conclusions and recommendations for further development of CMS-2-to-Ada translation technology. Two of the translators (those from CCCC and NRaD) were installed at NSWCDD and operated by NSWCDD and CSC. The third translator was operated in its native environment at JHU/APL. All three of the translators were used to translate the same segment of operational CMS-2 code—a weapons selection function.     

High-level mobility controller for a remotely operated unmanned land vehicle

The U.S. Army Laboratory Command, as part of the Department of Defense Robotics Testbed Program, is developing a testbed for cooperative, real-time control of unmanned land vehicles. The program entails the development and integration of many elements which allow the vehicles to perform both autonomous and teleoperated functions. The National Institute of Standards and Technology (NIST) is supporting this program by developing the vehicle control system using the Real-time Control System (RCS) architecture. RCS is a hierarchical, sensory-based control system, initially developed for the control of industrial robots and automated manufacturing systems. NIST is developing the portions of RCS that control all vehicle mobility functions, coordinate the operations of the other subsystems on the vehicle, and communicate between the vehicle and the remote operator control station. This paper reviews the overall control system architecture, the design and implementation of the mobility and communication functions, and results from recent testing.This work is funded by the U.S. Army Laboratory Command. This paper was prepared by U.S. Government employees and is not subject to copyright. Equipment listings do not imply a recommendation by NIST.     

DIPCS: An interprocess communication architecture for distributed multimedia systems

This paper presents the Distributed InterProcess Communication System (DIPCS) as a framework for managing communication in a distributed multimedia system. Within DIPCS, connection level management is provided through a novel distributed process group model called ADP-Group communication. The ADP-Group paradigm defines a new type of group message passing, calledqos-reliable. Qos-reliable semantics are appropriate to controlling real-time multimedia communication, by allowing a spectrum of performance and reliability specifications to co-exist within one group. DIPCS also provides an abstract programming model of multimedia devices, easing control of a heterogeneous multimedia system. Distributed multimedia applications can be rapidly developed using simple group operation primitives. We show how ADP-Group message delivery semantics can be directly mapped into an efficient Integrated Services Network support policy.Supported by Computational Diagnostics, Inc., and the Benjamin Franklin Fund for the Commonwealth of Pennsylvania.Supported by the Rome Laboratory (RL) of the Air Force Material Command and the Defense Advanced Research Projects Agency (Contract F30602-93-C-0038).     

On interprocess communication

A formalism for specifying and reasoning about concurrent systems is described. Unlike more conventional formalisms, it is not based upon atomic actions. A definition of what it means for one system to implement a higher-level system is given and justified. In Part II, the formalism is used to specify several classes of interprocess communication mechanisms and to prove the correctness of algorithms for implementing them. Dr. Lamport is a member of Digital Equipment Corporation's Systems Research Center. In previous incarnations, he was with SRI International and Massachusetts Computer Associates. The central topic of his research has been concurrency, and he can writeTEX macros and chew gum at the same time.Much of this research was performed while the author was a member of the Computer Science Laboratory at SRI International, where it was sponsored by the Office of Naval Research Project under contract number N00014-84-C-0621 and the Rome Air Development Command Project under contract number F30602-85-C-0024     

Multitype multiprogramming models

Summary We have presented models for multitype job traffic in a simple cyclic queueing model of a multiprogramming computer system (termed MM models), and have shown how such models may yield numerical results by use of a variation of the Gauss-Seidel iteration algorithm. Lastly, we have indicated the manner in which a simple Gordon and Newell Markov model be fitted to MM data, and have shown that satisfactory predictions of some system characteristics may be obtained thereby.Research sponsored in part by the Command and Control Technical Center of the Defense Communications Agency, and in part by NSF under grant number AG476 at the Naval Postgraduate School     

C4KISR测试与评估应用框架的研究与实现

基于HLA/RTI和分布式数据库初步构建了一个开放的测试和评估应用框架,为战术C4KISR系统中的指挥、控制、通信(C3)以及典型飞行器武器系统的作战效能(K)提供一种有效的可扩展的测试评估环境.系统采用了基于HLA/RTI的分布式体系结构,与被测系统相连.建立了典型的层次化战术CAKISR系统效能指标体系,并实现相应的评估算法模型.基于Oracle数据库建立了通用的战术C4KISR系统试验数据库/用例库/算法库和相应的管理工具,并开发了通用的分析评估工具,支持评估指标的在线/离线计算和显示.