A Fuzzy Knowledge Based System in Situation and Threat Assessment

This paper examines the use in assisting naval operators in managing the of a fuzzy knowledge-based system （KBS） situation and threat assessment problem in a littoral environment. Under the scenario created involving air contacts in a littoral environment, the assessment of the KBS model is conducted and the results show that the correlation between assessment and human operation officers＇ judgment was high. The fuzzy KBS with its corresponding toolkits is much more flexible to be integrated with other components of a command and control system, while the fine-tuning of membership functions and fuzzy inference rules are intensive, this makes any further modification a non-trivial task.     

Analysis of Influencing Factors of Technical Barriers on Information Product Exports Based on the Fuzzy AHP

To the actual situation of TBT impacting information product and according to the concept of the triangular fuzzy number, this paper forms the fuzzy matrix of factors of impacting export of information product, then uses the fuzzy AHP to analyze and rate factors. We put forward suggestions on how to keep away and surpass the technical barriers to trade in the information product enterprises.     

System reliability evaluation method considering physical dependency with FMT and BDD analytical algorithm

Recently, the physics-of-failure(PoF) method has been more and more popular in engineering to understand the failure mechanisms(FMs) of products.However, due to the lack of system modeling methods and problem-solving algorithms,the information of FMs cannot be used to evaluate system reliability.This paper presents a system reliability evaluation method with failure mechanism tree(FMT) considering physical dependency(PDEP) such as competition, trigger, acceleration, inhibition, damage accumulation, and parameter combination.And the binary decision diagram(BDD) analytical algorithm is developed to establish a system reliability model.The operation rules of ite operators for generating BDD are discussed.The flow chart of system reliability evaluation method based on FMT and BDD is proposed.The proposed method is applied in the case of an electronic controller drive unit.Results show that the method is effective to evaluate system reliability from the perspective of FM.     

A multi-objective robust operation model for electronic market enabled supply Chain with uncertain demands

A multi-objective robust operation model is proposed in this paper for an electronic market enablexi supply chain consisting of multi-supplier and multi-customer with uncertain demands. Suppliers in this supply chain provide many kinds of products to different customers directly or through electronic market. Uncertain demands are described as a scenario set with certain probability;, the supply chain operation model is constructed by using the robust optimization method based on scenario analyses. The operation model we proposed is a multi-objective programming problem satisfying several conflict objectives, such as meeting the demands of all customers, minimizing the system cost, the availabilities of suppliers＇ capacities not below a certain level, and robustness of decision to uncertain demands. The results of numerical examples proved that the solution of the model is most conservative; however, it can ensure the robustness of the operation of the supply chain effectively.     

Distributed High-Gain Attitude Synchronization Using Rotation Vectors

This paper addresses attitude synchronization problems for systems of multiple rigid-body agents with directed interconnection topologies.Two scenarios which differ in available information are considered.In the first scenario the agents can obtain their rotations and angular velocities relative to an inertial reference frame and transmit these information to their neighbors,while in the second scenario the agents can only obtain their own angular velocities and measure the relative rotations and relative angular velocities of their neighbors.By using rotation vectors and the high gain control,the authors provide torque control laws asymptotically synchronizing the rotations of the system almost globally for the first scenario and with initial rotations of the agents contained in a convex ball of SO(3)for the second scenario.An illustrative example is provided to show the synchronization results for both scenarios.     

基于HLA的作战模拟系统一体化设计与实现

为了提高现有作战模拟系统的互操作性、可重用性与可扩展性,完善作战模拟系统的一体化建设,首先,分析了一体化系统建设的主要任务,归纳了其主要涉及的四类十一项关键技术。其次,重点阐述了如何利用HLA仿真技术框架来搭建海军诸兵种一体化作战模拟系统的体系结构,并详细描述了系统间信息交换协议的设计思路,定义了一个对象类、七个交互类及路径空间。最后,给出了系统仿真实现的流程图及其时钟推进机制,并用一个仿真实例验证了设计的可行性。

Abstract：

The research is to improve the interoperability,reusability and extensibility of the existing wargame simulation systems,and to construct an integrated wargame simulation system. Firstly,the main tasks of the research were defined and eleven key technologies in four categories were introduced. Secondly,it was described how to set up an architecture for the Navy arms wargame simulation system based on HLA （High Level Architecture） simulation framework. Also,the design ideas of the information exchange protocol of the system were elaborated,including definitions of object class,interaction class and routing space. At the end,a flow chart and advancing time mechanism were given. The feasibility of design has been verified with an instance.     

System portfolio selection based on GRA method under hesitant fuzzy environment

The hesitant fuzzy set(HFS) is an important tool to deal with uncertain and vague information.In equipment system portfolio selection, the index attribute of the equipment system may not be expressed by precise data;it is usually described by qualitative information and expressed as multiple possible values.We propose a method of equipment system portfolio selection under hesitant fuzzy environment.The hesitant fuzzy element(HFE) is used to describe the index and attribute values of the equipment system.The hesitation degree of HFEs measures the uncertainty of the criterion data of the equipment system.The hesitant fuzzy grey relational analysis(GRA) method is used to evaluate the score of the equipment system, and the improved HFE distance measure is used to fully consider the influence of hesitation degree on the grey correlation degree.Based on the score and hesitation degree of the equipment system,two portfolio selection models of the equipment system and an equipment system portfolio selection case is given to illustrate the application process and effectiveness of the method.     

A Model-Based, Aspiration-Led Decision Support System NY-IEDSS

An Al-aided simulation system embedded in a model-based, aspiration-led decision support system NY-IEDSS is reported. The NY-IEDSS is designed for mid-term development strategic study of the Nanyang Region in Henan, China, and is getting beyond its prototype stage under the decision maker's (the end user) orientation. The integration of simulation model system, decision analysis and expert system for decision support in the system implementation was reviewed. The intent of the paper is to provide insight as to how system capability and acceptability can be enhanced by this integration. Moreover, emphasis is placed on problem orientation in applying the method.     

基于多种软件平台的卫星动力学仿真研究

卫星工具包STK(SatelliteToolKit)只能对自身的模块化方案进行验证和演示。引入了三维建模技术和可视化技术,并基于STK和Matlab的无缝连接,研究建立卫星动力学仿真系统。该仿真系统采用建模软件LightWave建立卫星三维模型,利用STK/Matlab模块提供的接口功能,开发新的轨道与姿态控制模块,为用户定制的轨道与姿态控制方案提供仿真、验证和演示。     

STK三维场景构建及优化方法研究

针对STK(Satellite Tool Kit)软件在军事任务可视化仿真领域中的广泛应用,为充分挖掘其显示潜能,重点解决了影响其三维场景构建的瓶颈问题,即三维场景数据格式的转换和数据的获取优化。在分析构建STK三维场景所需要素及其作用的基础上,分别对地形、地表纹理、三维模型和GIS等四类数据格式进行分析,并利用多种辅助软件,系统地提出了由较通用格式数据向STK所支持格式数据的转换方法,以及在对各类原始数据的获取和转换过程中出现的问题进行处理的优化方法。最后通过实例验证表明该数据格式转换方法和数据优化方法行之有效,三维场景显示效果逼真。     

基于HLA的卫星轨道机动仿真研究

针对STK(Satellite Tool Kit)在联合作战仿真中实时互操作能力的不足,提出了一种灵活的基于HLA(High Level Architecture)的卫星轨道机动仿真系统设计方法。建立了圆轨道之间平面内霍曼转移、平面外单脉冲和双脉冲轨道转移三种轨道机动模型,设计了多视图可视化表现子系统和仿真对象模型(Simulation Object Model,SOM)。与STK的仿真结果对比表明了该方法的可行性和模型的有效性。     

面向流场可视化的沉浸式虚拟现实交互系统研究

针对基于二维显示交互环境的流场可视化应用由于深度信息不足导致交互效率较低的问题,引入虚拟现实技术,提出具备多样化交互方式的沉浸式流场可视化系统。该系统基于凝视与手势交互技术,设计并实现了基于用户手势的导航方法与三维交互控件,基于用户凝视与手势的沉浸式交互面板,以及基于可视化场景的沉浸式交互管理方法与基于可视化算法树的可视化网络管理方法,对用户交互进行了系统化管理,能够在沉浸式环境提供对典型流场可视化操作的全流程支持。用户实验结果表明：该系统能够在典型流场可视化场景下为用户提供高效、自然的交互。     

基于STK的航天发射实时可视化系统研究与实现

首先分析了可视化系统所使用的各种关键技术,包括STK X技术、Connect模块以及各种建模资源的获取等。接着将系统按照功能进行了模块划分,并对各模块进行了详细阐述,设计实现了系统的软硬件。最后以某任务为实例,对系统进行了验证。结果表明该系统地形、影像和GIS数据真实,仿真度高,窗口视点展示灵活,数据表达精准,实时性强。     

航天器远程导引变轨方案设计数字化平台

卫星工具包STK(Satellite Tool Kit)具有强大的仿真演示功能,而设计能力不足.利用STK/X模块,进行VC 和STK的无缝连接,通过使用STK/Astrogator模块的轨道机动仿真功能和STK地图窗口、三维窗口的演示功能,实现集远程导引变轨方案的设计、修正、仿真、演示于一体的数字化平台.该平台实现了远程导引变轨方案设计的全数字化,快速化,并提供良好的图形用户界面、飞行方案的数据库管理和丰富的数据报表和图形,为变轨方案的优选、优化和验证提供基础.     

虚拟海战场态势三维显示系统设计与实现

对战场态势显示系统所需要显示的要素进行了详细的分析;给出了建立的战场综合态势显示系统的功能需求;建立了操控接口、通信接口、数据处理、操作控制和渲染显示等5个功能模块,设计了以HLA/RTI为底层通信协议,以GIS为前端显示的虚拟海战场三维态势显示系统,提供海战场地理环境、自然环境、电磁环境、作战兵力、特效等环境在内的战场三维环境描绘、显示;最后给出了实现结果和结论。     

基于三维地质模型的TBM施工动态可视化仿真

针对TBM施工涉及因素众多、地质条件复杂的特点,提出将三维地质建模技术引入施工仿真,对基于三维地质模型的长隧洞TBM施工进行动态可视化仿真研究.构建了TBM施工区域三维地质模型;全面考虑地质因素的影响,按照不同岩性条件选取参数并建立仿真模型,进行隧洞TBM施工过程仿真分析;根据仿真成果将施工信息与三维动态面貌进行耦合,实现基于三维地质模型的TBM施工过程动态可视化.实例分析表明,该方法改变了仿真结果传统的表现模式,为全面地掌握长隧洞TBM施工过程提供一种新的分析工具.     

侦察信息融合处理仿真系统的设计与实现

介绍了一种侦察信息融合处理仿真系统的设计和实现方法，该系统由战场剧情仿真系统、数据融合处理系统和数据库系统构成。其中数据融合处理系统是整个系统的关键部分，由基于jerk模型的机动目标融合跟踪模块、基于模糊推理的目标识别模块以及态势感知模块组成。系统模拟了主动雷达，被动雷达，敌我识别器，通信侦察设备等多种传感器对海空战场态势进行综合感知的信息处理流程，构建了侦察信息融合处理仿真系统，并对一个典型的战场场景进行了仿真实验。     

航天发射可视化仿真分析技术与应用研究

航天发射领域开展了大量的数字化设计验证、数字化合练与模拟训练、箭地联合仿真评估等数字化实验工作,都涉及航天发射信息可视化的问题。利用虚拟现实技术、系统仿真技术、数据可视化技术等,按照多线程、多模块架构设计思想,以及消息队列系统交互模式,构建了集数据管理、场景管理、计算管理和脚本管理功能于一体的航天发射可视化仿真分析技术平台,并开展了多星危险性、特种操作测发工艺、整流罩开孔和测试发射流程状态可视化仿真分析应用案例研究。