内容适配技术研究综述

内容适配技术是实现通用多媒体接入的技术体系。MPEG-21标准提出了内容适配技术框架和服务环境描述技术规范。针对MPEG-21内容适配框架,从内容适配系统、服务环境数据交换、适配决策等方面,介绍国内外相关研究现状。     

泛组合运算模型研究

泛逻辑学是在模糊逻辑的基础上,分析命题之间关系的连续可变性。提出了“广义相关性”和“广义自相关性”两个重要的概念,将命题连接词运算模型定义为由相关性所控制的算子簇,实现了命题连接词运算模型的柔性化。其中泛组合运算模型是为了满足连续值逻辑中综合决策的需求而提出的。目前仅有二元模型,在实际应用中迫切需要多元模型。但由于泛组合问题的复杂度随着“元”的个数增加而急剧增大,其设计有一定的难度。提出了多元泛组合运算模型和生成元加权零级泛组合运算模型,从而不仅满足了应用中多元综合决策的要求,还进一步完善了泛逻辑学中的命题连接词理论。     

Universality and programmability of quantum computers

Manin, Feynman, and Deutsch have viewed quantum computing as a kind of universal physical simulation procedure. Much of the writing about quantum logic circuits and quantum Turing machines has shown how these machines can simulate an arbitrary unitary transformation on a finite number of qubits. The problem of universality has been addressed most famously in a paper by Deutsch, and later by Bernstein and Vazirani as well as Kitaev and Solovay. The quantum logic circuit model, developed by Feynman and Deutsch, has been more prominent in the research literature than Deutsch’s quantum Turing machines. Quantum Turing machines form a class closely related to deterministic and probabilistic Turing machines and one might hope to find a universal machine in this class. A universal machine is the basis of a notion of programmability. The extent to which universality has in fact been established by the pioneers in the field is examined and this key notion in theoretical computer science is scrutinised in quantum computing by distinguishing various connotations and concomitant results and problems.     

谓词形式系统(A)UL-h∈[0.75,1]及其可靠性

对基于一级泛与运算的一阶谓词演算形式系统(A)UL-h∈[0.75,1]进行公理化.通过引入全称量词和存在量词,建立与命题形式系统(A)UL-h∈[0.75,1]相对应的一阶谓词形式系统V(A)UL-h∈[0.75,1]并证明该系统的可靠性定理及演绎定理.     

多媒体复合同步模型

多媒体同步是多媒体研究应用的一个重要方面,文中在分析了多媒体制作,播放的特点后,提出了一种新的多媒体的同频模型－复合同步模型。     

Developing Knowledge-Based Intelligent Multimedia Tutoring Systems Using Semantic Content-Based Modelling

The complex nature of semantic video and audio content has made multimedia difficult to use within the traditional architecture of a knowledge-based intelligent tutoring system (ITS). This paper investigates how multimedia syntax and semantics may be integrated into the confines of the knowledge-based ITS architecture so as to develop a knowledge-based intelligent multimedia tutoring system (IMTS). The paper contributes a semantic content-based model that can be used for this purpose. Multimedia frames (m-frames) are used as the framework by which the syntactic and semantic information is represented within the model. The paper discusses how IMTSs may be developed using the model, and then demonstrates the use of our approach in the development of ARISTOTLE, an IMTS for teaching young children basic zoology.     

多媒体认证技术

随着Internet技术和多媒体技术的发展，多媒体信息得到了广泛地使用，但是另一方面，多媒体信息的安全问题也越来越突出，严重地影响了人们的正常工作和生活，要有效地保护多媒体信息的安全，就必须对多媒体信息进行认证，多媒体认证技术是一种全新的保护多媒体信息安全的技术，本文对多媒体认证技术中的关键技术进行了论述，内容包括：多媒体认证的对象、方式、方法、要求和体系结构等，最后对多媒体认证技术的研究发展指出了一些可能的方向。     

湘电股份通用型服务器安全研究

围绕湘电股份所拥有的通用服务器的安全,全面介绍了实现通用服务器安全的各个方面,从而有效地保障公司通用服务器稳定安全地运行,为加速公司信息化进程提供强大的资源支持.     

Modeling Content for Semantic-Level Querying of Multimedia

Many semantic content-based models have been developed for modeling video and audio in order to enable information retrieval based on semantic content. The level of querying of the media depends upon the semantic aspects modeled. This paper proposes a semantic content-based model for semantic-level querying that makes full use of the explicit media structure, objects, spatial relationships between objects, events and actions involving objects, temporal relationships between events and actions, and integration between syntactic and semantic information.     

Adaptive Multimedia Presentation Strategies

Multimedia presentations comprise various media objects such as text, audio, image, and video that are delivered to users according to certain temporal relationships. In stored multimedia presentations, these temporal relationships are explicitly formulated by the author(s) and stored along with the presentations. However, it is difficult to ensure that these temporal relationships are always strictly preserved in real-time, distributed multimedia presentations. This is due to the fact that various components of the run-time environment such as operating system and network may offer only best effort services, i.e., they may not be able to provide any real-time guarantees. In this paper, we survey the different approaches that can be used for adapting multimedia presentations to handle instances where temporal relationships cannot be preserved in a strict manner. We classify these approaches into three categories and discuss when these categories of adaptations can be used.     

高职院校多媒体课件制作方法探究

多媒体课件作为一种现代教学手段,在高职院校课堂教学中发挥着独特的作用。阐述了多媒体课件在高职院校课堂教学中能够发挥的作用,分析了高职院校多媒体课件制作中存在的问题,结合教学课件设计制作经验和应用技巧,重点介绍了制作多媒体课件的方法及步骤,为高职院校多媒体课件制作提供参考。     

An interdisciplinary heuristic evaluation method for universal building design

This study highlights how heuristic evaluation as a usability evaluation method can feed into current building design practice to conform to universal design principles. It provides a definition of universal usability that is applicable to an architectural design context. It takes the seven universal design principles as a set of heuristics and applies an iterative sequence of heuristic evaluation in a shopping mall, aiming to achieve a cost-effective evaluation process. The evaluation was composed of three consecutive sessions. First, five evaluators from different professions were interviewed regarding the construction drawings in terms of universal design principles. Then, each evaluator was asked to perform the predefined task scenarios. In subsequent interviews, the evaluators were asked to re-analyze the construction drawings. The results showed that heuristic evaluation could successfully integrate universal usability into current building design practice in two ways: (i) it promoted an iterative evaluation process combined with multi-sessions rather than relying on one evaluator and on one evaluation session to find the maximum number of usability problems, and (ii) it highlighted the necessity of an interdisciplinary ad hoc committee regarding the heuristic abilities of each profession. A multi-session and interdisciplinary heuristic evaluation method can save both the project budget and the required time, while ensuring a reduced error rate for the universal usage of the built environments.     

基于泛组合运算的分类器融合

本文介绍了一类可用于分类器融合的泛组合逻辑算子,同时作为方法论基础研究了基于案例学习的泛逻辑运算符（算子）构造和选择方法,并以此构造分类器的融合器,实验数据集选择了UCI的spam数据集,并同其他融合方法进行了对比。结果表明本文所述方法具有较低的错误率和相应较高的查全率。     

泛逻辑泛运算模型之间的关系*

研究泛逻辑的泛与运算模型、泛或运算模型与模糊非之间的关系。证明了零级泛与运算模型T(x,y,h)、零级泛或运算模型S(x, y, h)与强非N(x)=1-x形成De Morgan三元组,当h∈(0, 0.75), 零级泛或运算S(x, y, h)=(min(xm+ym, 1))1/m, N(x)=(1-xm)1/m时, T, S, N形成一个强De Morgan三元组。进一步证明了一级泛与运算模型T(x, y, h, k)、一级泛或运算模型S(x, y, h, k)与N(x)=(1-xn)1/n满足De Morgan定律;特别当h∈(0, 075), 一级泛或运算模型S(x, y, h, k)=(min(xnm+ynm, 1))1/nm, N(x)=(1-xnm)1/nm时, T, S, N形成一个强De Morgan三元组。     

浅谈多媒体通信技术的应用与未来发展研究

多媒体通信是把声音、图像等多种信息载体传到远方,或通讯双方不但可以听到声音、传送文件,还可以看到对方。多媒体网络通信技术目前广泛应用于远程教学、实时多媒体会议、视频点播和电子商务等领域。文章通过对现代通信技术的概括和分析,总结出未来多媒体通信的多种发展方向。     

浅析课件的合理编制

教育信息化进程的发展,课件成为提高教育教学效率的重要辅助手段。近年来,课件的广泛应用,既有成功的经验,更有不成功的教训。本文试从课件的选题、制作、特点、运用等多方面进行阐述,以期给同行借鉴与参考。     

面向对象技术在多媒体数据库中的应用

随着多媒体技术的不断发展,传统的数据库技术无法对多媒体数据进行有效地管理。该文研究了面向对象技术在多媒体数据库中的应用,重点讨论了基于面向对象的多媒体数据库系统的实现。     

Multi-input single-output filter with reduced number of passive elements employing single current conveyor

A new biquadratic universal filter configuration realising second-order low-pass, band-pass, and high-pass functions employing single current conveyor is proposed. Using this configuration high-pass, low-pass and band-pass filters can be realized with little modifications. The circuit employs a second-generation current conveyor (CCII+), and only four passive components. Since the current conveyor is a high performance active element, the circuit proposed is suitable for wide band applications. The derived filters can be easily cascaded and use reduced number of passive components compared to previously reported counterparts. To illustrate the design possibilities provided by the introduced circuit current mode multifunction filters are constructed and tested.