构建虚实融合的地方高校计算机实验平台

分析地方高校大学计算机基础课程的现状,以培养学生的计算思维能力为目标,提出将虚拟实验体系融入实践教学环节,构建集虚拟实验平台、实践训练平台、网络作业平台和综合测试平台为一体的虚实融合的实验平台,为学生提供丰富的课内外实践训练,在培养学生计算思维的同时提高其应用技能和创新素质。     

基于短波通讯技术的军用工程机械远程状态监控系统研究

应用短波通讯技术建立无线网络,实现工程机械作业的远程监控,为监控中心实时掌握机械状态提供保证.描述了基于短波通讯技术的军用工程机械远程状态监控系统组成结构,以起重机为例对车载状态监测平台硬件和软件进行了设计,探讨了军用工程机械与监控中心通讯的实现.     

虚拟现实技术在高层决策训练中的应用研究

对虚拟现实技术在高层决策训练中的应用研究成果--战略决策虚拟训练平台的体系结构、虚拟战略时空集成环境以及动态对抗推演机制等方面进行归纳和总结,并对虚拟实现的技术特征"3I"在高层决策训练中的体现、研究重点以及面向训练模型体系构建等问题进行了详细地分析,期以对今后该领域的研究发展有所帮助和启迪.     

面向机务虚拟维修训练的虚拟手操作设计

机务维修训练强调手部操作要素,针对虚拟维修过程中手部操作较简单且控制复杂的问题,提出一种基于基本维修作业分类的虚拟手操作仿真方法。基于层次化分解思想构建出新的分解策略,将机务维修任务分解为任务层、子任务层和基本维修作业层,并设计规则实现基本维修作业到虚拟手操作的映射,通过在3ds MAX中构建虚拟手仿真模型,利用骨骼动画技术实现虚拟手的控制,减轻虚拟手关节运动的控制负担,在自主开发的机务训练装备上进行虚拟手操作实验,以飞机电子舱门操作为例,验证方法的可行性和实用性。     

虚拟组织信息系统动态集成研究

虚拟组织信息系统是一种分布性、柔性、开放性能够快速适应组织变化与发展的动态集成系统。提出了基于SOA体系框架来构建虚拟组织信息系统,分析了虚拟组织从组建到解散的动态集成过程框架。应用Web Services技术设计了一个虚拟组织信息系统动态集成应用系统,具有了用户访问系统、动态业务构建器、UDDI注册服务系统和信息管理工具等功能。最后给出了虚拟组织信息系统动态集成在图书馆信息资源共享服务项目中的应用实例。     

基于BP神经网络的工程兵桥梁爆破方案评估模型

工程兵桥梁爆破属特种作业,专业性强,爆破方案的优劣难以评估,针对此问题,文章在对工程兵桥梁爆破影响因素分析基础上,构建了以爆破人员、爆破目标、爆破工具为主的桥梁爆破方案评估指标体系,并研究了军用桥梁爆破方案评估方法,确立了基于BP神经网络的军用桥梁爆破方案评估模型.最后以某工程兵地爆分队执行军用桥梁爆破任务为例,基于相关训练数据对待选方案进行了评估,验证了模型的有效性.     

舰载机保障作业人机协同决策方法

舰载机保障作业是航空母舰航空保障系统的重要组成部分,其调度效率不仅影响舰载机出动架次率,而且严重制约航空母舰作战效能发挥.在多舰载机保障的动态甲板作业环境下,安全高效地为舰载机分配保障资源,最大限度地减少舰载机因资源分配冲突产生的时间开销,是提高舰载机保障作业调度效率的关键途经.现有基于启发式、机器学习等方法舰载机保障作业调度策略,存在计算量大、鲁棒性差、训练效率低等问题.为此,本文将舰载机保障作业调度问题建模为分布式多智能体协同控制的顺序决策问题,构建了一种新颖的基于人机协同的多智能体作业调度决策框架HCMTPF(human-machine collaborative multi-agent task planning framework),有效地提高了保障作业调度决策模型的学习效率.在此基础上,提出了一种基于人类行为可信度的自适应作业分配方法,进一步提高了智能体自主探索能力和人类指导经验利用率.经大量仿真实验验证,本文提出的舰载机保障作业人机协同决策方法比其他方法在计算性能和学习效率方面具有明显优势.     

基于课证融通的路由器与交换机课程虚拟实训体系构建

充分利用虚拟实训环境构建路由器与交换机课程＂V-3＂虚拟实训体系,将学习该课程必备的能力训练在虚拟环境中完成,让学生操作虚拟设备如同操作真实设备;并针对该体系提出了＂1432＂三段式层次实训教学模式。     

一种基于神经网络的装备保障方案评估模型

针对装备使用过程中对具体保障方案的评估研究少,传统评估方法在权重确定时带有主观性,部队获取专家经验难的问题,依据保障工作实际,构建了保障方案评价指标体系,采用重心法对体系内的定性指标进行去模糊化处理,利用遗传算法对去模糊处理过程中的偏置量进行了计算,并构建了BP神经网络的保障方案评估模型,经过实际数据样本的训练和检验,证明评估模型具有收敛速度快,精度高的特点,适用于对保障方案的动态持续评估.     

车载指控通信系统虚拟维修教学训练平台设计

为了紧贴未来体系化作战对分队指控通信装备维修保障的现实要求,针对原有单体设备维修训练模式的不足,突出系统级维修训练模式,利用虚拟仿真技术,构建了一种沉浸式虚拟维修教学训练平台,实现三维虚拟可视化认知教学和近实战化仿真交互训练,能够为车载指控通信系统构造与原理、通信组网运用中的故障诊断与排除等教学内容提供训练环境。     

虚拟现实技术在培训系统中的应用

介绍了虚拟现实技术在培训系统中的具体应用。分析了虚拟培训系统的组成．选择了OpenGVS和MultiGen作为虚拟培训系统开发平台。并详细论述了从场景建模到场景驱动的整个系统实现过程。     

Design characteristics of virtual learning environments: state of research

Virtual learning environments constitute current information systems’ category for electronically supported training and development in (higher) education(al) and vocational training settings. Frequently expected advantages of using virtual learning environments refer, for instance, to the efficiency, individuality, ubiquity, timeliness and learning task orientation. However, a crucial precondition of realising such advantages is an appropriate system design. Hence, the question “Which specific design characteristics actually characterise successful virtual learning environments?” is of specific interest for training and development practice. This paper therefore discusses virtual learning environments’ design characteristics by conducting an in-depth literature review. Based on this, a comprehensive set of diverse design characteristics of virtual learning environments as well as particular information associated with them are elicited, presented and discussed. Beyond this, particular implications for research and practice are derived. This may contribute to a successful development, implementation and (continuous) improvement/evaluation of virtual learning environments.     

某型雷达虚拟维修训练系统的设计与实现

为提高教学训练效果，弥补装备教学训练中实装不足、装备损耗大、教学训练成本高等实际问题，设计并实现了某型雷达虚拟维修训练系统。该虚拟维修训练系统包括系统主界面和系统集成框架两大部分，具有装备结构展示、装备操作训练、装备维修训练、训练效果评估、数据支持等多项功能，有效解决了上述装备教学训练中存在的实际问题。目前，该系统已应用到相关专业的装备构造与维修、装备综合实践等多个课程当中，取得的很好的教学训练效果，系统的设计开发可为其他装备虚拟维修训练系统的开发提供参考与借鉴。论文首先介绍了系统的基本功能和结构，然后详细论述了系统模型的开发过程，最后给出了虚拟训练工作流程。     

An immersive multi-agent system for interactive applications

This paper presents an interactive multi-agent system based on a fully immersive virtual environment. A user can interact with the virtual characters in real time via an avatar by changing their moving behavior. Moreover, the user is allowed to select any character as the avatar to be controlled. A path planning algorithm is proposed to address the problem of dynamic navigation of individual and groups of characters in the multi-agent system. A natural interface is designed for the interaction between the user and the virtual characters, as well as the virtual environment, based on gesture recognition. To evaluate the efficiency of the dynamic navigation method, performance results are provided. The presented system has the potential to be used in the training and evaluation of emergency evacuation and other real-time applications of crowd simulation with interaction.     

装备虚拟维修培训系统设计与实现

针对目前部队及相关军事院校对武器装备维修培训的需求,结合虚拟现实技术的发展现状、系统结构特征设计了基于虚拟维修技术的装备维修培训系统总体方案。对其中的三维模型设计、维修过程设计、碰撞检测、交互方式等关键技术进行了分析与研究,实现了角色管理、虚拟维修演示与训练、维修信息记录等功能,涵盖学习、训练、评估环节。最后以某武器装置为对象对该系统进行实际应用,结果证明可以满足用户在装备维修训练领域的需求,可有效提高装备维修效率,为装备维修培训提供了新的可行方法。     

Development and evaluation of a virtual training environment for on-line robot programming

The paper reports on the development and evaluation of a virtual reality system to support training in on-line programming of industrial robots. The system was evaluated by running training experiments with three groups of engineering students in the real, virtual and virtual augmented robot conditions. Results suggest that, the group with prior training in the virtual reality system augmented with cognitive/perceptual aids clearly outperformed the group that executed the tasks in the real robot only. The group trained in the non-augmented virtual reality system did not demonstrate the same results. It is concluded that the cognitive/perceptual aids embedded in the augmented virtual reality system had a positive effect on all task performance metrics and on the consistency of results across participants on the real robot. Virtual training environments need not be designed as close as possible to the real ones. Specifically designed augmented cognitive/perceptual aids may foster skill development that can be transferred to the real task. The suggested training environment is simple and cost effective in training of novices in an entry level task.     

飞机虚拟维修训练系统可信度评估方法研究

针对“人在回路”和“硬件在回路”仿真系统规模大,实体多的特点,提出一种基于二级模糊综合评价法的仿真系统可信度评估方法;运用层次分析法对飞机虚拟维修训练系统不同层级的仿真模型的可信度进行分析,从而建立一种基于二级层次模型的复杂仿真训练系统的可信度指标体系;运用模糊综合评价方法与专家评价法相结合的可信度评估量化方法,实现了对虚拟仿真训练系统的量化计算;在此基础上,利用典型实例对该方法进行了实验验证,证明该方法对可重用复杂仿真系统实现精确地量化评估;并根据实验结果分析了仿真系统的改进方向,对其提高仿真效果和实训能力具有重要的指导作用。     

Development of a Virtual Reality Training System for Live-Line Workers

This article presents a training system for live-line workers. The developed training system is based on immersive virtual reality and automatic speech recognition technology. The training is focused on live-line Cut-Out-Switch (COS) replacement work in a distribution system. Most work in power systems must be free of interruption, so it is carried out by live-line techniques. However, these techniques have increased the number of accidents by electric shock. Because most electric accidents are due to live-line work, it is important to train live-line workers. The proposed training system provides repeated and cost-effective training for a small space. It also guarantees safety during training operations. In this article, the background of live-line techniques and the work procedure of COS replacement are presented. The architecture of the developed system, the creation of the virtual work environment, and the collision detection among virtual objects are also described.     

虚拟现实技术在视景仿真系统中的应用

利用虚拟现实技术可以在仿真系统中构建出逼真的三维虚拟环境。讨论了虚拟现实技术的涵义和特征,重点研究了在实现一个视景仿真系统时所用到的关键虚拟现实技术,并给出了虚拟现实技术在一个军事模拟训练系统的三维战场视景仿真中的具体应用。     

Augmented reality-based training system for hand rehabilitation

This study designs a training system for hand rehabilitation on the basis of augmented reality technology, which enables patients to simultaneously interact with real and virtual environments. The system framework is introduced, and four rehabilitation programs, namely, trajectory training, shelf training, batting training, and spile training, are presented. As a requirement of hand rehabilitation training, a color marker that is suitable for hand rehabilitation training is adopted. Following the Hamming coding principle, this marker is designed as a 7?×?7 square that is filled up by four designated colors with a binary bit of “0” or “1”. The check code in each row of the color marker is applied to restore the occluded binary bits, solve the occlusion issue of color markers, and complete the tracking registration of the color markers. The effectiveness of the developed system is evaluated via a usability study and questionnaires. The evaluation provides positive results. Therefore, the developed system has potential as an effective rehabilitation system for upper limb impairment.