共查询到19条相似文献,搜索用时 78 毫秒
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基于SIP的集中式多媒体会议系统的研究 总被引:5,自引:0,他引:5
基于IP网络的多媒体会议系统是一个重要的研究课题。该文通过对各种会议拓扑结构的分析和比较,提出了一种以SIP作为控制信令的、集中式拓扑结构的多媒体会议系统。在给出了系统的框架结构之后,该文研究了如何扩展基本的SIP协议来完成会议控制的功能,并针对几种常用的会议控制功能,给出了详细的控制机制。 相似文献
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会议正日益成为企业运作管理与企业知识形成的重要途径,良好的会议管理对企业具有重大的意义。针对现阶段会议管理普遍存在的问题,通过分析企业知识形成的过程,提出了一种会议模型。在此基础上设计一个会议系统,不但能够对会议的议题、文档、记录、决议等相关信息进行统一管理,而且还构建了会议知识库以实现会议知识的查询与回溯,从而提高了企业知识形成的效率,并能够更有效地应用会议知识。 相似文献
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计算机会议系统流结合模型的研究 总被引:2,自引:0,他引:2
流结合是开放分布式处理参考模型的一个重要概念本文首次以计算机会议流结合作为基本模式,采用ODP的五各观点方法系统地研究了一个分布式会议系统。文中提出会议流结合模型的概念,分别从企业,信息,计算,工程和技术各个分面式会议系统。文中提出会议流结合模型的概念,分别从企业,信息,计算,工程和技术各个层面突出了会议系统的信息流结构及其交互特性,从而成为会议系统实现模型的基础。 相似文献
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Image sequences processing and video encoding are extremely time consuming problems. The time complexity of them depends on image contents. This paper presents an estimation of a block motion method for video coding with edge alignment. This method uses blocks of size 4 × 4 and its basic idea is to find motion vector using the edge position in each video coding block. The method finds the motion vectors more accurately and faster than any known classical method that calculates all the possibilities. Our presented algorithm is compared with known classical algorithms using the evaluation function of the peak signal-to-noise ratio. For comparison of the methods we are using parameters such as time, CPU usage, and size of compressed data. The comparison is made on benchmark data in color format YUV. Results of our proposed method are comparable and in some cases better than results of standard classical algorithms. 相似文献
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ITC is cool. How can this be, you ask? This is the International Test Conference's 36th year, which makes it a middle-aged conference; and, as anyone who has ever been middle-aged knows, being cool at this time of life is a serious challenge. ITC doesn't try to be cool, at least not in the way that, say, Macworld does. ITC tries instead to be interesting, innovative, and informative. All three of these qualities are vital for a successful conference. 相似文献
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Gesa Lindemann 《AI & Society》2016,31(4):573-575
Robots are coming into different spheres of our daily lives, and therefore it is important that we now reflect systematically and in a comprehensive and inclusive way on the effects this may have on human interactions with other people and with machines. In Delmenhorst we held the conference “Going beyond the Laboratory.” Reflecting on the discussions of the conference, the editorial team realized a conceptual gap between the engineering sciences on the one hand and the social sciences and philosophy on the other hand. In order to initiate first steps in the direction of overcoming this divide, the editorial team decided to put forth three questions crucial for the issue of social interaction with robots and collected answers by experts in different robotics research projects. The questions are: How are we to understand the term robot autonomy in robotics and in social life? How is the idea of robot autonomy related to the limits of mathematization? I.e. is it possible, to fully express mathematically processes of social interaction? And finally, how are interactions between humans and robots in everyday life related to social institutions on a micro- and macro-level? 相似文献
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远程视频会议的应用已很多年了,但是,目前的视频会议系统对使用者的限制较多,往往需要使用者对系统保持关注方可正常使用。如何通过改善视频会议系统的人机交互模式来改善用户感受是视频会议系统进一步完善的重要途径。多模态机器注意技术来自于仿生学的研究成果,本文通过对基于多模态信息集成和同步来实现机器注意技术的讨论,将这种技术用于改进视频会议系统的人机交互模式,通过使视觉、听觉信号集成和同步的方法实现人工系统中视觉关注于感兴趣的对象——发言人的脸部及其发言。改进后的系统大大减少了发言人受到的约束,能够准确地自动跟踪发言人,而且在画面上更加突出视频会议画面中感兴趣的对象。 相似文献
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Abstract Most, if not all, researchers attend conferences as a part of their practice, and yet it is an under-researched activity. Little attention has been paid either to developing a theoretically informed understanding of conference practice as knowledge building, or to assessing the extent to which conferences are successful. This paper addresses these issues in the context of a small empirical study of the introduction of mobile, interactive (‘back-channel’) technologies into a conference setting. Science studies and learning theories literatures are used to develop an eight-point statement describing the aims of an idealised conference. This is then used as a framework through which to make sense of what happened when ‘back-channel’ technologies such as internet relay chat (IRC) and blogging were introduced into the 2004 Colston Symposium ‘The Evolution of Learning and Web Technologies: Survival of the Fittest?’. Focusing on sequential issues and the conference as a forum for knowledge building, the analysis shows that conference order is disrupted by the introduction of the back-channel technologies. Nevertheless, other pressures on academic and professional practice (the governance agenda, calls for greater collaboration and a more consensual approach, and so on) suggest that the potential of the new technologies to help open up the black box of scientific and professional practice will be seen as increasingly important. If these tools are to be used effectively in the future, conferences will need to be supported by new skills and practices. 相似文献
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C. Calude, A. Nies, L. Staiger, and F. Stephan posed the following question about the relation between plain and prefix Kolmogorov complexities (see their paper in DLT 2008 conference proceedings): does the domain of every optimal decompressor contain the domain of some optimal prefix-free decompressor? In this paper we provide a negative answer to this question. 相似文献
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On optimization of expertise matching with various constraints 总被引:1,自引:0,他引:1
Wenbin TangAuthor Vitae Jie TangAuthor VitaeTao LeiAuthor Vitae Chenhao TanAuthor VitaeBo GaoAuthor Vitae Tian LiAuthor Vitae 《Neurocomputing》2012,76(1):71-83
This paper studies the problem of expertise matching with various constraints. Expertise matching, which aims to find the alignment between experts and queries, is a common problem in many applications such as conference paper-reviewer assignment, product-reviewer alignment, and product-endorser matching. Most existing methods formalize this problem as an information-retrieval problem and focus on finding a set of experts for each query independently. However, in real-world systems, various constraints are often needed to be considered. For example, in order to review a paper, it is desirable that there is at least one senior reviewer to guide the reviewing process. An important question is: “Can we design a framework to efficiently find the optimal solution for expertise matching under various constraints?” This paper explores such an approach by formulating the expertise matching problem in a constraint-based optimization framework. In the proposed framework, the problem of expertise matching is linked to a convex cost flow problem, which guarantees an optimal solution under various constraints. We also present an online matching algorithm to support incorporating user feedbacks in real time. The proposed approach has been evaluated on two different genres of expertise matching problems, namely conference paper-reviewer assignment and teacher-course assignment. Experimental results validate the effectiveness of the proposed approach. Based on the proposed method, we have also developed an online system for paper-reviewer suggestions, which has been used for paper-reviewer assignment in a top conference and feedbacks from the conference organizers are very positive. 相似文献