A Multimedia Presentation Toolkit for the World Wide Web

This paper describes the design and implementation of MPRES, a Multimedia Presentation Toolkit for the WWW. The WWW has seen phenomenal growth over the last couple of years. It has become a vast repository of multimedia information that is accessible to virtually anyone having a browser. MPRES is a multimedia presentation system that allows a user to compose and render a presentation consisting of objects referenced by their URLs (Uniform Resource Locators). It uses the concept of dynamic documents to render on a WWW browser, a sequence of multimedia scenarios, having objects of types such as audio, image, plaintext, HTML (Hypertext Markup Language) document and animation. MPRES Author, the authoring subsystem, allows the user to interactively test and compose such a presentation, using the Netscape Navigator to collect multimedia resources from the WWW. A presentation database stores the presentations and provides a convenient frontend for accessing them. © 1997 John Wiley & Sons,Ltd.     

基于WWW的音频信息系统

介绍了网络多媒体信息的特点,ＷＷＷ和Ｊａｖａ的音频功能,并描述了音频信息的结构和客户访问音频信息的软件界面。     

网络信息搜寻技术与发展

信息搜寻是网络技术的新课题。本文介绍了在因特网上进行信息搜寻采用的算法、策略和现有检索工具的工作原理以及网络信息搜寻技术的新发展。     

基于智能粒子滤波的多传感器信息融合算法

针对粒子滤波中存在粒子质量低和粒子贫化的问题,提出了一种基于智能粒子滤波的多传感器信息融合算法。该算法分为两个模块,首先,将多传感器数据发送给相应的粒子滤波计算模块,以优化粒子分布为目的更新建议分布密度;然后,在智能粒子滤波模块中对多传感器数据构造完整的似然函数,引入设计的遗传因子将小权重粒子修正为大权重粒子,近似于真实的后验分布,重采样过程中保留了权值较大的粒子,又避免了粒子耗尽问题,进一步保持粒子的多样性,提高了滤波精度,最终得到最优的估计值。根据实船实验的数据进行了验证,将所提算法应用于GPS/SINS/LOG组合导航系统进行仿真计算验证了其有效性。实例仿真结果表明,所提算法能够得到精确的位置、速度和航向信息,而且也能有效改善滤波性能,提高了组合导航系统的解算精度,能够满足船舶高精度导航定位的要求。     

Integrated approach of cognitive maps and neural networks using qualitative information on the World Wide Web: the KBNMiner

Abstract: In this paper, we propose a method for integrating cognitive maps and neural networks to gain competitive advantage using qualitative information acquired from news information on the World Wide Web. We have developed the KBNMiner, which is designed to represent the knowledge of domain experts with cognitive maps, to search and retrieve news information on the Internet according to the knowledge and to apply the information to a neural network model. In addition, we investigate ways to train neural networks more effectively by separating the learning data into two groups on the basis of event information acquired from news information. To validate our proposed method, we applied 180,000 news articles to the KBNMiner. The experimental results are found to support our proposed method through tenfold cross‐validation.     

改进的模糊遗传算法及在信息过滤中的应用

为了改进传统遗传算法在求解复杂问题上存在早收敛及搜索后期运行效率低等缺点,提出了一种应用于文本分类和信息过滤的模糊遗传算法.首先应用了年龄概念来控制种群规模,使得遗传操作过程更接近于自然进化过程,然后引进参数的模糊调整过程,对遗传算法的参数种群规模,交叉率及变异率3个方面进行动态调整,改进了遗传算法的搜索性能.实验结果表明,相比传统遗传算法,该模糊遗传算法在全局优化能力及收敛速度上均有显著提高.     

Distributed and cooperative information retrieval on the World Wide Web

A masss of heterogeneous,distributed and dynamic information on the World Wide Web(the Web) has resulted in “information overload“ .It‘s an important and urgent reserach issue to provide users with effective information retrieval service on the Web.Web search enginees attempt to solve this problem,yet their effect is far from satisfying.In this paper,a distributed and cooperative strategy for information retrieval on the Web is proposed to substitute the centralized mode adopted by the current search engines.Then a new information retrieval system model IRSM is presented.which supports the retrieval of metadata about web documents and uses Z39.50 standard protocol to unify the heterogeneous interfaces of uments and uses Z39.50 standard protocol to unify the heterogeneous interfaces of different systems.Based on that,a distributed and cooperative information refieval framework,called DCIRF,is designed to help users in fast and effective information retrieval on the Web.     

万维网局部结构研究与分析

文中以网站为单位研究万维网的局部结构特征,检测包含3个节点的模体,发现全连通子图是绝大多数实验网站的模体,而连接稀疏的子图只属于极少数实验网站的模体,然后结合当前成熟的搜索引擎技术对上述结果做出理论分析。为了测试实验网站是否具有相同的局部结构,其后进行了三元组重要性剖面实验,发现所有实验网站中都包含3个网络超家族。     

Evolving information filtering for personalized information service

Information filtering(IF) systems are important for personalized information service.Howerver,most current IF systems suffer from low quality and long training time,In this paper,a refined evolving information filtering method is presented.This method describes user‘s information need from multi-aspects and improves filtering quality through a process like natural seslction.Experimental result shows this method can shorten training time,improve filtering quality,and reduce the relevance between filtering results and training sequence.     

A structure-based approach for multimedia information filtering

While multimedia documents are sequentially presented to users, an information filtering (IF) system is useful to achieve a good retrieval performance in terms of both quality and efficiency. Conventional approaches for designing an IF system are based on the user's evaluation on information relevance degree (IRD), but ignore other attributes in system design such as relative importance of the data in a collection of multimedia documents. In this paper, we aim at developing a framework of designing structure-based multimedia IF systems, which incorporates the characteristics of the importance and relevance of multimedia documents. A method of calculating the values of relative importance degree of multimedia documents is proposed. Furthermore, these values are combined into the IRD of multimedia documents to improve the representation of user profiles. An illustrative example is given to demonstrate the proposed techniques.     

结合用户背景信息的协同过滤推荐算法

针对个性化推荐系统中协同过滤算法面对的数据稀疏问题,提出了一种结合用户背景信息的推荐算法。该算法充分利用已有的用户数据和领域知识,对用户背景信息的相似度建模,在进行协同过滤前预先填充用户-项评分矩阵。实验表明该方法能够有效地提高推荐精度,并且不会带来性能上的瓶颈。     

基于VSM的个性化信息过滤算法的研究

针对当前搜索引擎“所有用户,同一结果”模式的不足,分析了用户兴趣模型与文档的权值特征,在研究基于向量夹角余弦相关度排序算法的基础上,引入重要度因子,结合文档结构、查询请求及用户兴趣模型等信息,提出了一种基于VSM的个性化信息过滤算法,以实现个性化检索的目的,提高检索系统的查准率。     

A Multimedia World Wide Web Based Conference Minute System for Group Collaboration

In this paper, we propose a World Wide Web based conference minute system which preserves important information in the conference as web documents and maintains hyperlinks to related minutes to accelerate the progress of the project. This system, based on our Java application sharing framework, provides capabilities to record and replay the audio/video data of the video conference and operations of the shared applications used in the meeting in a synchronous manner. Through the hyperlinks, people can quickly understand the logic flow of every meeting held in the project duration and select any part in a meeting for replay to know what has actually happened. Furthermore, when a new meeting is held, a minute template is generated by the system to inherit the hyperlinks from its predecessors. Other related minutes and the execution status of the resolutions in the project can be easily accessed through the hyperlinks between them. Through the help of the system, execution of the project and management of its organizational memory could be easily achieved to increase the productivity of the collaborative groups with geographically dispersed members.     

Discovering and Analyzing World Wide Web Collections

With the explosive growth of the World Wide Web, it is becoming increasingly difficult for users to discover Web pages that are relevant to a topic. To address this problem we are developing a system that allows the collection and analysis of Web pages related to a particular topic. In this paper we present the systems overall architecture and introduce the focused crawler used by the system. We also discuss the various techniques we use to allow the user to analyze and gain useful insights about a collection. Finally, we present some statistics on the collections.     

Gathering accurate client information from World Wide Web sites

This paper discusses the design and use of a number of simple measurement methods that are available to the developers of small World Wide Web (Web)systems. The focus is on how the resulting data can be used to assist with re-designing the initial system. The author argues that the analysis of viewer usage patterns, together with the need for ever more sophisticated collection should form an essential part of the development life cycle of a Web-based system. The conclusion outlines some desirable features of such tools, based on development and maintenance experience on a University site.     

信息检索与过滤中的信息需求表示方法

信息需求的表示方法是影响信息检索和信息过滤结果的重要因素。介绍了一些基本的信息需求表示方法，并对各种表示方法对信息检索和信息过滤结果产生的影响进行了分析和比较，最后提出了改进这些方法的一些思想。     

面向维吾尔文的敏感信息过滤方法研究

在这个信息量爆炸性增长的时代,网络不良信息充斥在日常生活当中。为了构建洁净的网络环境,实现对网络维吾尔文中敏感信息的检测与过滤,通过分析维吾尔文的特点,将维吾尔文进行词干提取和编码化处理,再结合DFA和决策树提出了针对维吾尔文敏感信息过滤的相应方法。维吾尔文经过词干提取、编码化处理解决了维吾尔文书写顺序和形式多样、存储易出现乱码等问题。再结合决策树的特点,将转码后的维吾尔文信息存储于决策树节点上,将决策树的子节点按照特定编码进行顺序排列。这样维吾尔文文本信息进行敏感信息过滤时可以缩小检测范围,提高算法效率。     

信息筛选多任务优化自组织迁移算法

针对现有自组织迁移算法(SOMA)只能求解单个优化问题及其隐并行性未能被充分挖掘的缺陷,提出信息筛选多任务优化自组织迁移算法(SOMAMIF)实现同一时刻处理多个优化问题.首先,构造多任务统一搜索空间,并根据任务个数设置相应的子种群;然后,对各子种群当前最优适应值进行判断,当任务连续若干代停滞进化时则产生信息交互需...     

基于评分信息量的协同过滤算法研究

传统的协同过滤算法中,依靠用户评分大小计算用户间相似度,但是评分数据稀疏性使相似度计算不够准确。针对此问题,提出了基于评分信息量的相似度计算方法;在推荐系统中项目有多种可选评分,该方法将参与评分的用户数量转换为评分信息量,以此结合用户评分大小计算相似度。实验结果表明,相对于传统协同过滤算法,该方法在一定程度上减少了评分数据稀疏性带来的负面影响,有效地提高了预测评分准确性。     

A conceptual model for user-centered quality information retrieval on the World Wide Web

Information retrieval from the Internet is becoming a commonplace phenomenon. Users and consumers are browsing websites and seeking various kinds of information for personal use. Retrieving quality information from the Internet can be challenging even for the computer-savvy. There are several search engines, even some personalized, to help users search for information on the Internet. In spite of all the claims about search engines, users still have difficult time retrieving relevant information quickly. This paper proposes a general conceptual model for user-centered quality information retrieval (UCQIR) from the Internet. The UCQIR conceptual model is presented in an architectural form. The UCQIR architectural model uses the concept of “Task-performer” to present various aspects of an information retrieval system at the knowledge level. Task-performer is an abstract construct used to conceptualize the idea of an entity that is competent in doing its tasks. The UCQIR architectural model can be used to easily design and develop domain-specific, user-centered quality information retrieval systems. The proposed UCQIR conceptual model is unique and comprehensive. The use of the conceptual model is illustrated through a design of a patient-centered quality medical information retrieval for the medical domain. We also present an experimental evaluation of a UCQIR prototype based upon real user experiences. The experimental results are very positive.