共查询到20条相似文献，搜索用时 31 毫秒
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文章探讨虚拟实验在机械控制工程基础课程教学中的应用,介绍虚拟实验在课程教学改革中的意义及MAT-LAB/Simulink仿真功能。在MATLAB/Simulink环境下,通过对数控机床进给传动链系统进行数学建模与仿真实例,提出基于MATLAB/Simulink仿真软件的开放式虚拟实验教学改革的模式;分析仿真软件在该课程教学中的应用方法。教学实践表明,将虚拟实验引入课程教学,可以激发学生学习的主动性和创造性,有利于培养创新型人才,对促进教学改革、课程建设和管理工作,提高教学质量具有现实意义。 相似文献
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设计了针对典型过程控制系统进行的虚拟仿真控制平台,利用虚拟仪器软件LabVIEW和仿真工具Simulink进行平台的开发,通过Simulation Interface Toolkit(SIT)实现两者通信。该平台的系统开发选取过程控制工程课程中的典型控制环节,平台的功能包括:典型控制系统的流程图动画界面显示,后台控制器设计,以及实时参数和控制效果显示等。最后还设计了平台选择程序,实现程序的封装。该系统能作为过程控制工程的辅助教学软件,达到将实验环节引入课堂的良好效果。 相似文献
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为了提高计算网格的服务质量(QoS),研究了包含多层调度器的分级分布式网格体系结构中的QoS-aware作业调度问题,提出了一种将计算网格本地调度器作业选择中所使用的作业优先级与全局调度器的作业分配策略相结合的QoS-aware作业调度综合控制策略.建立了一个具有2层调度器的计算网格的随机高级Petri网(SHLPN)模型,并且进行模型精化设计以降低模型求解的复杂性.使用基于SHLPN的性能分析技术进行系统性能评价.数值结果显示QoS-aware作业调度策略能够为高优先级的作业提供较QoS-unaware作业调度策略更好的QoS保证. 相似文献
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在网络中搜索各种资源时,通用的搜索引擎很难满足用户特定的需求。P2P网络是一种有效的资源共享和搜索方式。通过分析P2P网络的基本结构和资源共享特点,提出了一种基于P2P的资源网络模型(PBRN)。PBRN是由各资源实体"自组织"形成的分布式、虚拟、动态和松散的纯P2P网络,并实例化的剖析了它在教育信息资源上的应用。 相似文献
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基于LabVIEW的自动控制仿真系统设计 总被引：1，自引：0，他引：1
介绍了以LabVIEW为软件平台,通过LabVIEW界面与Simulink仿真模型双方通讯建立的自动控制仿真系统。通过结合LabVIEW和Simulink二者在各自领域的优势,将虚拟仪器思想应用到传统实验仪器掌控的自动控制实验,建立灵活的“虚拟实验室”。从而增加学生的实践机会,增强学生实验兴趣,加深学生对理论的理解,更重要的是可以鼓励学生探索更高级的课题。 相似文献
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In this paper, we present an intelligent architecture, called intelligent virtual environment for language learning, with embedded pedagogical agents for improving listening and speaking skills of non-native English language learners. The proposed architecture integrates virtual environments into the Intelligent Computer-Assisted Language Learning. This architecture supports visual, auditory, and haptic channels of interaction. It allows pedagogical ideas about language skills to be implemented and validated with a minimum design time. Moreover, we design a computational model to evaluate learner's proficiency level, and an automatic adaptation mechanism which adjusts to the learner's learning curve. We have implemented two scenarios based on the proposed architecture to teach learners how to communicate in public places such as airports and TV stores. Inputs to this system include learner's speech and hand motion, and outputs include graphical scenes, force feedback, and speech by a few embodied agents. Throughout interactions, agents discover the proficiency level of the learner and customize the level of communication complexity accordingly. The system is tested on 10 subjects. Experimental results show 14% increase in the number of proper replies, 3% decrease in grammatical errors, 16% decrease in pronunciation duration, and 11% increase in learners' proficiency level within three trials. 相似文献
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随着我国经济的逐步增长,居住条件日益改善,人们对生活环境舒适度的要求越来越高,对中央空调的需求越来越大,对它的舒适、节能、健康更加重视。因此,设计一项舒适、节能、健康的中央空调工程是很有实际意义的。本文主要是利用MATLAB软件中的Simulink对在某一特定的空间内所设计的空调系统进行建模与仿真。 相似文献
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The evolvable multiprocessor （EvoMP）, as a novel multiprocessor system-on-chip （MPSoC） machine with evolvable task decomposition and scheduling, claims a major feature of low-cost and efficient fault tolerance. Non-centralized control and adaptive distribution of the program among the available processors are two major capabilities of this platform, which remarkably help to achieve an efficient fault tolerance scheme. This letter presents the operational as well as architectural details of this fault tolerance scheme. In this method, when a processor becomes faulty, it will be eliminated of contribution in program execution in remaining run-time. This method also utilizes dynamic rescheduling capability of the system to achieve the maximum possible efficiency after processor reduction. The results confirm the efficiency and remarkable advantages of the proposed approach over common redundancy based techniques in similar systems. 相似文献
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The evolvable multiprocessor (EvoMP), as a novel multiprocessor system-on-chip (MPSoC) machine with evolvable task decomposition and scheduling, claims a major feature of low-cost and efficient fault tolerance. Non-centralized control and adaptive distribution of the program among the available processors are two major capabilities of this platform, which remarkably help to achieve an efficient fault tolerance scheme. This letter presents the operational as well as architectural details of this fault tolerance scheme. In this method, when a processor becomes faulty, it will be eliminated of contribution in program execution in remaining run-time. This method also utilizes dynamic rescheduling capability of the system to achieve the maximum possible efficiency after processor reduction. The results confirm the efficiency and remarkable advantages of the proposed approach over common redundancy based techniques in similar systems. 相似文献
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英美文学虚拟教学课堂的架构设计 总被引：1，自引：0，他引：1
文章从英美文学教与学的角度，在软件架构层面，设计了英美文学虚拟教学课堂的的分布式软件架构，架构中的模块采用分层软件架构风格进行设计。论述了基于Web的英美文学虚拟教学课堂的特点，并对照传统教学模式做了分析与比较，阐述了采用基于Web的英美文学虚拟教学课堂进行英美文学教学的意义和价值。 相似文献
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随着网络技术的发展和教学资源的扩大,改进和优化虚拟实验室体系结构,建立三维模型库,可以提高模型利用率并加快模型检索速度,实现虚拟教学资源的共享性和扩展性。初步探讨了基于网络模型库的虚拟实验室的体系结构,分析了三维模型库设计过程中需要考虑的几个问题,最后实现了一个简单的三维模型库原型系统,并应用在虚拟考察实验室中。 相似文献
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Virtual Reality (VR) technology has already entered into the area of the educational software and delivers systems where the trainees can use interactive virtual microworlds and benefit by transfer of experience, interacting directly with the learning domain. This paper describes the Virtual Multi Flow Graph (Virtual-MFG) graphical formal model and the Interaction Specification Workspace (ISW) software architecture for the interaction specification and design of VR applications with emphasis on educational software. The interaction designer specifies the interaction issues of the final system formally, using the tools of ISW. The virtual microworld's objects database is updated with these interaction specifications which include both the virtual objects' dynamic properties and their tutoring capabilities. The model is validated by applying it on an existing VR educational software (EIKON). The Virtual-MFG graphs specifying a learning scenario of EIKON along with the application of ISW on EIKON are also presented. 相似文献
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《British journal of educational technology : journal of the Council for Educational Technology》2006,37(5):705-720
This study is concerned with online learners’‘flow’ experiences. On the basis of Csikszentmihalyi’s theory of flow, flow was conceptualised as a complex, multimentional, reflective construct composing of ‘enjoyment’, ‘telepresence’, ‘focused attention’, ‘engagement’ and ‘time distortion’ on the part of learners. A flow model was put forward with regard to virtual class environment in a traditional university context, comprised with flow antecedents, flow and flow consequences. Based on the model, a virtual‐course flow measure was developed and administered to 525 undergraduate students engaged in virtual classes in order to examine the empirical relationships between measured flow antecedents, flow experiences and flow consequence‐course satisfaction in this case. The analysis of the data showed that: (1) students’ perceptions of their level of ‘skill’ and ‘challenge’ specific to each course are critical to determining the level of flow, (2) flow is a significant predictor of course satisfaction and (3) other than flow, individual differences such as ‘gender’ and ‘having a clear goal’ can make a significant difference in the level of flow in a virtual course. These findings are discussed along with the implications for bringing up a computer‐mediated environment more conducive to flow and learning. 相似文献
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This paper first introduces a way to improve interactivity with high polygon count virtual objects through the ＂mixed＂ use of image-based representation within one object. That is, both 3D polygonal and image-based representations are maintained for an object, and switched for rendering depending on the functional requirement of the object. Furthermore, in order to reduce the popping effect and provide smooth and gradual transition during the object representation switch, the object is subdivided with the subdivided parts possibly represented differently, i.e., using 3D models or images. As for the image-based representation, the relief texture （RT） method is used. In particular, through the use of the mixed representation, a new way called TangibleScreen is proposed to provide object tangibility by associating the image-based representation with a physical prop （projecting the RTs） in a selective and flexible way. Overall, the proposed method provides a way to maintain an interactive frame rate with selective perceptual details in a large-scale virtual environment, while allowing the user to interact with virtual objects in a tangible way. 相似文献
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Zhuang Ruping 《安顺学院学报》2008,(2)
虚拟网上实验系统的研究是我国现代远程教育技术发展的一项重要内容。我们研究并建立了一套基于Web的实验控制系统。论文依赖于计算机技术和网络技术,提出了虚拟实验系统软件平台的设计方案,提出了虚拟实验体系结构,并设计实现了应用层上的基于内容分类的多种类型任务轮转(MC-RR)调度策略。通过定性分析,能够确定该调度策略不仅是切实可行的,而且可较好地满足系统可扩展性和负荷均衡等性能要求。 相似文献
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利用Matlab图形用户界面开发工具GUI设计无刷直流电动机单、双闭环调速系统的虚拟仿真实验平台。采用Simulink仿真技术搭建后台无刷直流电动机单、双闭环调速系统仿真模型。针对无刷直流电动机参考转速变化、负载转矩变化等情形,在虚拟仿真实验平台进行无刷直流电动机单、双闭环调速系统虚拟仿真实验,实验结果验证了所建立仿真模型的正确性和虚拟实验平台的实用性。通过仿真实验教学,加深学生对所学内容的理解,激发学生的学习兴趣,加强学生创新思维和创新能力的培养。 相似文献
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Seung Won Yoon Scott D. Johnson 《Educational technology research and development : ETR & D》2008,56(5-6):595-618
With the advancement of Internet communication technologies, distributed work groups have great potential for remote collaboration and use of collective knowledge. Adopting the Complex Adaptive System (CAS) perspective (McGrath, Arrow, & Berdhal, Personal Soc Psychol Rev 4 (2000) 95), which views virtual learning teams as an adaptive and self-organizing entity, this study examined group development processes of seven intact virtual learning teams over 12 weeks using the multiple case study design. Content analysis revealed seven temporal group development phases: orientation, scheduling, exploration, work and decision, progress check and evaluation, refinement and formatting, and termination. The development pattern of each virtual learning team could be described as either Linear Progression, a straight movement through those phases, or Adaptive Progression, a backward movement to a previous phase for adaptation before proceeding. We also identify the factors that caused each team to develop in one way or the other and conclude with the implications of conceptualizing virtual teams as a CAS. 相似文献