CAREER: Querying Heterogeneous and Multimedia Information Systems

职业：查询异构和多媒体信息系统

• 批准号: 9734548
• 负责人: Yannis Papakonstantinou
• 金额: $ 24万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 2003-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9734548&HistoricalAwards=false
• 关键词: CAREER; Querying; Heterogeneous; Multimedia; Information

The project focuses on several crucial requirements of upcoming information management systems: integrated access to heterogeneous sources, data warehousing, and multimedia data. It also integrates education and research. As part of the educational component of this project, UCSD's database curriculum is being reshaped to provide students with hands-on experience, basic principles, and exposure to research challenges in the above areas. The research enhances the state of the art in two areas: the integration of very large numbers of Internet sources and the extraction and querying of semantic information from video data. In the area of data integration, query processing algorithms are developed and integrated into the TSIMMIS mediator system; they use knowledge of data replication to avoid retrieving redundant/replicated data and enhance the availability and efficiency of the system. A new cost-based optimizer is developed for high performance in browsing of partial results. The optimizer is provided with probabilistic information on source data overlap and develops plans for efficient delivery of partial answers. In the area of video data, the COMIX system is developed. COMIX is customized by users with SQL-like actions and queries that assist COMIX in extracting semantic information orders of magnitude faster than by a brute-force approach. COMIX introduces novel query processing optimizations which exploit the sequentiality, fuzziness and continuity of the video data. In the upcoming era where the Web and the digital TV signal will enter every living room, the proposed version of the TSIMMIS mediator system will allow the user to search the vast volumes of Web data in a manner that exploits redundancy and replication of Web data, rather than being impeded by it (as is currently the case.) Then the COMIX system will be a step towards "smart VCRs", which will be screening the digital TV signal and extracting information of interest to the user. http://www-cse.ucsd.edu/~yannis

该项目的重点是即将到来的信息管理系统的几个关键要求：集成访问异构源，数据仓库和多媒体数据。它还整合了教育和研究。作为该项目教育部分的一部分，UCSD的数据库课程正在重塑，为学生提供实践经验，基本原则和接触上述领域的研究挑战。该研究在两个方面提高了最先进的水平：大量互联网资源的集成和从视频数据中提取和查询语义信息。在数据集成方面，开发了查询处理算法，并将其集成到TSIMMIS中介系统中;它们使用数据复制的知识来避免检索冗余/复制的数据，并提高系统的可用性和效率。提出了一种新的基于代价的优化器，用于部分结果的高性能浏览。优化器被提供有关于源数据重叠的概率信息，并制定计划以有效地交付部分答案。在视频数据方面，开发了COMIX系统。COMIX由用户使用类似SQL的操作和查询进行自定义，这些操作和查询帮助COMIX以比蛮力方法更快的数量级提取语义信息。COMIX引入了新的查询处理优化，利用视频数据的顺序性，模糊性和连续性。在即将到来的时代，网络和数字电视信号将进入每个客厅，TSIMMIS中介系统的拟议版本将允许用户搜索大量的网络数据的方式，利用冗余和复制的网络数据，而不是被它阻碍（目前的情况）。然后，COMIX系统将是迈向“智能录像机”的一步，智能录像机将筛选数字电视信号并提取用户感兴趣的信息。 http://www-cse.ucsd.edu/~yannis