FORMI: Integrating Adaptive Fragmented Objects into Java RMI

Distributed object-oriented applications are commonly implemented atop middleware platforms such as CORBA, .NET Remoting, and Java remote method invocation (RMI). These platforms provide a simple mechanism to invoke methods of remote objects. Increasingly more applications are demanding nonfunctional properties such as fault tolerance, high availability, and adaptivity, which require extensions to distributed objects' basic interaction model. A fragmented-object model, such as the one Marc Shapiro proposed, can provide the required flexibility. It's far more generic and flexible than the traditional client-server approach. A fragmented object is a truly distributed object; it consists of multiple fragments located on multiple nodes. Such a model allows arbitrary partitioning of state and functionality on these fragments, and arbitrary internal interaction between fragments of a single object. We have investigated integrating a fragmented-object model into CORBA (AspectIX), which requires internal modifications to the CORBA object request broker. Our approach for transparently integrating fault-tolerant objects into .NET Remoting is also useful for seamlessly integrating fragmented objects. Our FORMI architecture integrates fragmented objects into Java RMI without requiring internal modifications to the RMI runtime     

汽车底盘电控系统专家咨询系统的研究与开发

在收集汽车底盘电控系统的结构特点、故障检测方法、相关名词、故障码等知识的基础上,建立相关数据库,利用面向对象、可视化编程语言Visual Basic 6.0设计出一个底盘电控系统相关知识的专家咨询系统.方便快捷地为汽车维修人员和需要查询底盘电控系统相关知识的人们提供专家咨询,可以降低汽车底盘电控系统故障诊断的难度,大大...     

面向对象技术中的对象映射

在软件工程中，客观对象被直接映射成软件对象和数据库中的对象，并且客观对象和它们在软件和数据库中的对象之间存在着一种映射关系，这种映射关系提供了高级的、抽象的客观对象到低级的软件和数据库对象之间的逻辑连续性。本文应用面向对象技术，用一个实例叙述了这种对象映射的过程，实践证明，该方法可行有效．并且可以为其它类似的软件开发提供了可行的建设方案。     

高分辨率遥感影像面向对象的分类方法

通过高分辨率遥感影像分类软件eCogniton的面向对象的图像分类技术,对影像进行分类和信息提取。采用多尺度对象分割方法生成图像对象,提高了分类信息的信噪比。通过eCogniton分类结果与传统分类结果的对比,其面向对象的特征提取算法,更适用于几何信息和结构信息丰富的高分辨率图像。     

An indexed atlas of digital mammograms for computer-aided diagnosis of breast cancer

Computer-aided diagnosis (cad) systems are being developed to assist radiologists in the interpretation of ambiguous mammographic features corresponding to possible signs of early breast cancer. Databases of digital mammograms are needed for testing such systems; we present an overview of a few such databases. Most databases are limited to single-exam sets of two or four mammograms on which the diagnosis was made, some ground-truth information related to the position of diagnostically significant mammographic features, and the diagnosis. We propose the design of a comprehensive, indexed atlas of digital mammograms. The design of an appropriate indexing scheme facilitates the implementation of content-based retrieval techniques needed for efficient access to and retrieval of relevant cases from the atlas. We also propose the use of mobile software agents for facilitating remote consultation of the atlas. Mobile agents can move between data sources such as the atlas and hospital repositories, perform computational tasks at each site, and return only relevant data to the user. These features reduce the computational requirements of the local computer system, bandwidth requirements, and overall network traffic. Proposed applications of the atlas include research, remote consultation, teaching, evaluation ofcad systems, and self-evaluation by radiologists.     

基于物联网的多层次远程煤矿安全监测系统

煤矿安全信息远程监测系统正变得越来越复杂,对数据的实时性、完整性和正确性,尤其是对实时数据响应的快速性、对监测环境的远程遥控能力提出了更高的要求。文章介绍了一种基于物联网的多部门、多层次煤矿安全信息远程监测系统,较为详细地介绍了系统的总体设计、软硬设计、数据传输程序设计及信息安全设计。该系统具有数据传输实时、完整、正确、遥控性能较好、数据处理和存取快速、系统可扩充并灵活支持扩展应用等特点,便于管理层快速、及时、准确地获取生产数据,提高决策科学性。     

面向协同制造的分布式对象与虚拟设计环境研究

针对分布式在协同设计与制造环境中的需求,提出了实体对象与分布式对象的映射模型和平台匹配方案。分析了协同虚拟制造(CVM,collaborative virtual manufacturing)的技术体系,给出了实体对象的分析方法,提出了分布式环境下的分布式对象映射模型,并设计了CVM分布式支撑环境架构；引入单元匹配和平台匹配量化分析,改进了信息平台效率测度的评价方法。通过实例分析,得到了CVM系统结构拓展模型,对分布式虚拟设计与测试环节进行讨论,表明了应用协同与虚拟现实技术的改进效率。     

基于PB的本地计费帐务系统界面设计

用户界面是计算机软件和用户交互的接口,是控制和选择信息输入/输出的主要途径,也是衡量软件质量的一个重要标准.首先介绍了用户界面与用户界面设计的原则及工作流程（分为结构设计、交互设计、视觉设计3个部分）,然后探讨本地计费帐务系统中用户界面设计的实现,主要是应用系统的窗口、菜单及各种控件等的设计方法.最后介绍一种通过用户对象定义状态栏的方法.     

基于硬件规范信息的测试设备设计

在介绍一种多对象适用自动检测设备硬件结构的基础上，详细叙述了该自动检测设备应用软件设计时将被测对象信息、检测设备硬件平台同被测对象间的硬件关联信息相对于测控程序进行分离并规范的思路及方法。通过硬件规范信息库的构建，该自动测试设备测控程序大大地减少了对检测设备与多被测对象硬件的关联性，具有一对多、易于扩充的优点。     

大气与地物光学特性数据库介绍

大气光学特性和地物波谱特性是支持遥感研究的重要基础信息,针对应用的需求研制开发了大气与地物光学特性数据库系统.介绍了该数据库系统的研制背景、软件结构、主要功能、信息内容以及预期的应用领域.     

Designing mobile computing systems using distributed objects

This article examines the application of distributed objects to the construction of highly available distributed systems for mobile, ubiquitous computing. High availability for the end user entails the provision of ubiquitous access and flexible resource-sharing. The defining characteristics of mobile computing, such as the frequent movement of users and hosts, the scarcity of network and local computing resources available to the mobile host, and the possibility of disconnections, present difficult challenges in providing high availability for clients in a distributed object system. Meeting these challenges requires dynamic object management techniques in the distributed server architecture on the fixed wired network, as well as object replica management techniques to achieve connection transparency and disconnected operation in the mobile client architecture. Various issues and solutions in constructing a dynamic distributed object-oriented architecture capable of supporting mobile computing are presented     

基于VC＋＋无人机地面测控系统设计

无人驾驶飞机是一种以无线电遥控或由自身程序控制为主的不载人飞机,对其实现远程遥控遥测是应用中的重要环节,直接影响着无人机整体性能的发挥,因此地面测控系统对无人机的应用起到了关键作用.文中介绍了一种基于VC＋＋面向对象方法的无人机地面测控系统的设计及具体实现,重点对系统的硬件设计和软件设计进行了阐述,并进行实验验证.实验和测试结果表明该测控系统具有较高的可行性和可操纵性.     

CDM－570L远控软件的设计与实现

分析了CDN-570L远控功能的需求背景,重点探讨了基于RS-485或RS-232接口远控软件的设计与实现。在介绍远控协议功能及特点的基础上,分析了传统面向过程设计的软件架构的不足,采用面向对象的思想进行了全新的设计,给出了总体架构和软件的类图。在新架构下,远控软件能方便移植到不同操作系统应用环境,增加新功能基本无需修改原有代码,可复用性、可扩展性和可维护性好,软件健壮性强。     

UML在管理信息系统设计与实现中的应用

统一建模语言（UML）已成为一种面向对象建模语言的标准,是一种通用的可视化建模语言,基于面向对象观点,对软件进行描述、可视化处理和构造等,它融入了软件工程领域的新思想、新方法和新技术。本文以销售管理信息系统的设计与实现为例,针对面向对象的建模方法,介绍了应用UML建模的方法和流程,探索了基于UML的管理信息系统建模及UML中多种模型图的使用方法和适用范围。     

基于ARM嵌入式局域网视频监控系统的设计与实现

设计了一种基于S3C2410X的ARM9 linux系统组成的远程嵌入式视频监控系统,该系统通过局域网实现对现场情景的监控,首先介绍了ARM处理器的基本结构、性能等情况;然后重点论述了远程监控系统的信息传输方案,就监控软硬件的开发做了简要描述.结果表明,该系统达到设计要求,为应用ARM技术实现远程监控及视频网络传输提供了解决方案.     

设计模式在软交换软件系统中的应用

设计模式针对面向对象系统中重复出现的设计问题，提出一个通用的设计方案并予以系统化，其具体种类包括Abstract Factory,Chain of Responsibility,Iterator,Observer,State,Strategy等，一旦设计模式应用到软交换软件系统设计中，就可以在寻找合适的对象，指定对象接口，运用复用机制，支持设计变化等方面提供帮助，设计模式在软交换软件系统中的具体应用包括通过Strategy实现计费策略等。     

Combining high-performance computing and networking for advanced3-D cardiac imaging

The paper deals with the integration of a powerful parallel computer based image analysis and visualization system for cardiology into a hospital information system. Further services are remote access to the hospital Web server through an Internet network. The visualization system includes dynamic three dimensional representation of two types of medical images (e.g., magnetic resonance and nuclear medicine) as well as two images in the same modality (e.g., basal versus stress images). A series of software tools for quantitative image analysis developed for supporting diagnosis of cardiac disease are also available, including automated image segmentation and quantitative time evaluation of left ventricular volumes and related indices during cardiac cycle, myocardial mass, and myocardial perfusion indices. The system has been tested both at a specialized cardiologic center and for remote consultation in diagnosis of cardiac disease by using anatomical and perfusion magnetic resonance images     

Modeling and analysis of message passing in distributedmanufacturing systems

This paper addresses the information flow between devices and programs in computer integrated manufacturing systems. Specifically, it presents modeling techniques and methods for detecting the existence of message paths among hardware and software components and the upper bound on time delays along that message path. The modeling technique can be used to analyze interoperability between hardware and software components in the system in initial design and specification. The modeling technique has three components: an object model to describe the message passing protocols between communicating components; a color timed Petri net to describe the dynamic behavior and state dependency within each individual component; and an object synthesis method that integrates the Petri nets of individual objects and message protocols between objects to describe the dynamics of the entire system. The graphical modeling can enhance communication among different groups involved in system design and the analytical method can provide component specifications. The use of the modeling technique and method in early system design can result in time and cost savings in system integration due to better communication, better component selection and early problem identification