基于网络化技术的大型集装箱船舶轮机模拟器

轮机模拟器是现代化航海教育的必备设施,已为中国海事局列入正工评估项目。三十年来,轮机模拟器随着计算机技术的发展不断地更新和升级,论文介绍了上海海运学院自行设计和研制的网络化的轮机模拟器。内容包括该轮机模拟器技术特点及计算机系统的结构;实时工控平台开发软件;人机界面的实现及系统仿真软件的开发技术。     

基于模型的无人机系统架构综合评估方法

系统架构综合评估是无人机(unmanned aerial vehicle, UAV)研制中的重要环节,本文从UAV总体设计的需求出发,提出了系统架构综合评估指标体系的全面性和层次性原则。根据基于模型的系统工程方法构建了三级评估指标体系。通过将系统架构模型的仿真结果作为评估指标体系的输入,建立了一种系统架构模型与评估模型关联的综合评估分析方法,以达到UAV总体技术方案快速闭环设计与优化的目标。面向工程应用,开发了一个系统架构多方案权衡软件。以某UAV系统架构综合评估作为实例,验证了方法与工具的正确性和工程实用性。     

基于UAF元模型的战区联合作战精确保障体系构建方法

针对当前战区联合作战精确保障复杂体系的系统化建设需求及研究空白,结合最新发布的统一结构框架(unified architecture framework, UAF)方法特点,在分析精确保障体系构建机理及概念数据模型的基础上,遴选并扩充能够满足体系概念构想层、逻辑运行层和物理实现层需求的视角模型。然后,通过对UAF相关元模型(domain metamodel, DMM)“裁剪+修改+融合”的方法构建各层次DMM。最后,提取并分析关键概念、关系达到对模型的统一认知,为精确保障体系模型设计构建及数据采集提供完整方法依据。     

基于智能优化算法的T-S模糊模型辨识

将智能算法应用在T-S模糊模型的辨识方面,是模糊系统辨识的一种新途径。文中对几种智能优化算法,如遗传算法(genetic algorithm, GA)、粒子群(particle swarm optimization, PSO)算法、菌群优化(bacterial foraging optimization, BFO)算法等的优化原理和在模糊辨识方面的应用现状进行了综述和分析,并给出了它们在T-S模糊模型辨识中对参数进行优化的过程。最后将这些优化方法用于一非线性动态系统的建模,并对仿真结果进行了对比和详细的分析,为进一步了解这几种优化方法在模糊模型辨识参数优化方面的作用提供了仿真实验依据。     

飞行器的多学科分析与计算机仿真

综合运用计算机软件对飞行器进行结构设计和多学科仿真分析，用来预测飞行器的结构力学，热力学，空气动力学，飞行控制等诸方面的特性及其相互之间的关系，文中介绍了编制的有关人机界面，数据转换程序，以及飞行器建模和仿真过程，并通过对某超音速飞行器的仿真计算给出了建模和多学科仿真分析的实例，利用多学科计算机仿真分析可以对飞行器进行优化设计。     

Multi-granularity evolution analysis of software using complex network theory

Software systems are a typical kind of man-made complex systems. Understanding their evolutions can lead to better software engineering practices. In this paper, the authors use complex network theory as a tool to analyze the evolution of object-oriented (OO) software from a multigranularity perspective. First, a multi-granularity software networks model is proposed to represent the topological structures of a multi-version software system from three levels of granularity. Then, some parameters widely used in complex network theory are applied to characterize the software networks. By tracing the parameters’ values in consecutive software systems, we have a better understanding about software evolution. A case study is conducted on an open source OO project, Azureus, as an example to illustrate our approach, and some underlying evolution characteristics are uncovered. These results provide a different dimension to our understanding of software evolutions and also are very useful for the design and development of OO software systems.     

An Analytical Framework of Social Learning Facilitated by Participatory Methods

Social learning among different stakeholders is often a goal in problem solving contexts such as environmental management. Participatory methods (e.g., group model-building and role playing games) are frequently assumed to stimulate social learning. Yet understanding if and why this assumption is justified is quite limited. Difficulties arise from the complexity and context-dependence of processes influencing social learning. Furthermore, continuing discussion of the exact meaning and theoretical basis of social learning result in a limited capacity to assess and evaluate whether social learning has occurred. In this paper we introduce an analytical framework to develop an in depth understanding of essential processes underlying social learning facilitated by participatory methods. Concepts from different fields of science are discussed and integrated, including resource management, small group research and learning research. The individual and group perspectives are brought together via mental models and emergent roles. We added the direction of learning, being either convergent or divergent, to be able to explore if and when personal views on a problem converge into a shared understanding of a problem. The analysis of convergence and divergence of learning is facilitated through the use of the mental model concept. Methods for measurement of proposed indicators for social learning are also discussed. The framework developed provides a conceptual basis for the analysis of social learning facilitated by participatory methods and an operationalization for application in empirical research.     

Power-Based Arbitrary Decisional Actions in the Resolution of MIS Project Issues: A Project Manager's Action Research Perspective

As a management information systems (MIS) project manager and an action researcher, the author examined, over time, the influence on information system development (ISD) of the informal sociopolitical organizational actions. The paper reports two cases of action research findings concerning the effect on ISD project implementation processes of power-based arbitrary decisional actions in bureaucratic environments. The research focused on the relationship of such unilateral actions to the interconnected subprocesses of deliberate and conscious attempts by the ISD project members to define and resolve system implementation issues. A suggested conceptual framework for the issue-resolution processes (IRP's) and obstacle-coping processes (OCP's) is based on the author's IRP/OCP-related behavioral constructs and theoretical models dealing with soft-systems issues, especially appreciative system theory and soft-systems methodology, and innovative flexible, "complementarist" (Sinn, 1998) or pluralist problem-solving approaches.     

The Management and Research of Geographical Names Using Geographical In for mation System

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‘SoS call’ at the other edge of chaos

The focus of this study is to understand and pave the way to build theory of System of Systems (SoS). The authors try to marshal the established thoughts and develop new insights to shed light on the topic. Although the research thrashes the proposed rudimentary concepts, yet they are important to caste clarity to lay the concrete foundation for the emerging concept of SoS. The first part of the paper discusses about the conceptual milieu of SoS. It tries to help resolve their identity crisis by proposing two edges of chaos. SoS and monolithic systems self-organize at two opposite edges. Then the research work defines SoS locus on extended system of systems methodology (E-SoSM) framework, and dissects it to decode its contradictory and aberrant behavior. Upon this understanding, the second part traces out the incapacitation of traditional military techniques for asymmetric warfare, typifying with a friendly fire incident of the current Afghan War. Seeing through this lens, conjures up that military SoS and anti SoS (enemy) fight to annihilate each other during the clashes of systems of systems in the theater of war.     

建模与仿真资源库系统的初探

建模与仿真资源库系统是仿真环境的核心，是实现建模与仿真资源重用性和提高仿真应用系统开发效率的重要支撑，本文初步探讨了建模与仿真资源库系统三个相关问题：建模与仿真资源库系统用户群，资源内容及其组织机制以及系统体系结构，文章主要部分：在传统Web数据库技术的基础上提出了一个基于分层，符合组件化思想，且具有扩展性和互操作性的系统概念体系结构。     

基于MVC模式的加速器虚拟控制系统框架与实现

针对虚拟样机技术在回旋加速器设计与制造上的应用和需求，提出了一个用于回旋加速器控制系统设计、仿真及验证的软件平台：Cyclotron Virtual Control Platform(CVCP)。该平台采用基于Model-View-Controller(MVC)的软件体系结构模式和面向对象的设计方法设计。设计中运用UML统一建模语言描述了系统框架，并使用C 语言进行了初步实现。该软件平台可以模拟回旋加速器的运行过程，同时具备良好的人机交互性能。     

The Application of Simulation Technique in Whole CIMS Life Cycle

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Rich Pictures: Collaborative Communication Through Icons

A visual language of pictures, such as the rich picture used in the Soft System Methodology, offers a way of global communication that far exceeds the limitations of text and speech. Simple graphics can be rapidly communicated, processed and transmitted within a large and culturally diverse constituency. This paper looks at the benefits and interpretative risks when using rich pictures for system understanding. The aim of this paper is twofold: firstly to report upon an observation of a large scale collaborative diagramming workshop and compare the resulting pictures with a previous workshop study. Secondly, to develop further ongoing research which suggests rich picture construction can be aided by providing an icon legend. This paper compares 2 rich picture workshops: the diagramming workshop at the Open University eSTEeM Diagramming Colloquium in March 2012 and a workshop held in Heriot Watt University in February 2012. The comparative results are set against the ongoing empirically grounded rich picture research within Heriot-Watt University in Scotland. Preliminary results suggest there are a set of distinguishable icons and shapes that are generic across all rich pictures regardless of domain. Further analysis of the early results suggests a natural intrinsic grammar is manifested within rich pictures in terms of relationships, icons, context and connectors.     

ADVANCES IN DECISION ANALYSIS AND SYSTEMS ENGINEERING FOR MANAGING LARGE-SCALE ENTERPRISES IN A VOLATILE WORLD： INTEGRATING BENEFITS, OPPORTUNITIES, COSTS AND RISKS （BOCR） WITH THE BUSINESS MOTIVATION MODEL （BMM）

1. Introduction Recent advances in Information and Communication Technologies (ICT) have occurred in a number of areas includinginformation quality (Chutimaskul and Wangpipatwong 2004), strategy (Sha, Hung and Lin 2004) organization (Crowne 2004), technological change (Mitchell 2004), and utility1. Introduction Recent advances in Information and Communication Technologies (ICT) have occurred in a number of areas includinginformation quality (Chutimaskul and Wangpipatwong 2004), strateg…     

我国首台核电站模拟器计算机的升级和软件移植

本文介绍了１９８５年我国从美国引进的第一台全范围核电站模拟器，由于计算机的升档所带来的整套拟器软件系统的移植工作。文中介绍了该模拟器的硬件和软件的主要结构，并着重介绍了软件移植过程中遇到的主要问题和解决这些问题的方法。     

基于HLA体系结构的交互式网络仿真设计

提出利用交互式网络仿真技术构建对用户透明的网络仿真系统并真实再现通信网络的观点,指出使用高级体系结构(HLA)来加强网络仿真技术在交互式仿真操作中的应用,从而克服了现存网络仿真软件只能模拟固定参数的网络模型的缺点。详细讲述了将网络仿真软件和用户控制台以联邦形式加入HLA中,通过RTI这条“软总线”传递信息以实现两者之间的通信的方法。这样,传统的,以离散事件驱动而无法提供与用户接口的网络仿真软件就可以在运行中与用户交互,从而实现交互式网络仿真系统。     

基于HLA的仿真系统模型研究

在基于HLA的仿真系统开发中,设计和建立HLA仿真系统的各种模型是促进仿真互操作和仿真组件重用的关键过程,模型问题是整个HLA联邦开发的核心问题。在提炼了HLA仿真系统建模过程的基础上,提出了改进的基于HLA的仿真系统开发模型体系,并总结了概念模型、对象模型和仿真模型的开发方法和过程,为各模型的快速、规范化开发打下了基础,并能够缩短基于HLA的仿真系统的开发周期,提高建模与仿真的效率。     

设计模式在通信系统仿真软件中的应用

对大型、复杂系统性能评估的最好方法是系统仿真和建模,仿真软件的设计是实现仿真目的的关键。对于这种复杂软件的开发,目前最好的方法是利用软件工程的方法,而设计模式现在则成为软件工程中不可缺少的方法。目的在于对设计模式在仿真软件中的应用做一些探讨,利用设计模式来提高仿真软件的可靠性、安全性、可用性和可维护性。