数字视频信息的索引研究*

视频信息的分析、索引和检索是多媒体信息检索研究领域的难点和热点问题之一。本文分析了视频信息的索引对象、内容建模、索引结构和索引模型，并在此基础上对视频信息的结构化、视频文档的组织和索引中存在的问题进行了探讨。     

计算机类支献主题标引一致性的探讨

标引的一致性是衡量主题标引质量的重要指标。综述了计算机类献主题标引不一致的四种表现，分析了引起标引不一致的原因，在此基础上探讨了计算机类献主题标引一致性的方法。     

论现代信息技术条件下检索语言的应用及检索效率变化

现代信息技术条件下 ,各类检索语言适应程度和用户的检索习惯等因素会对其检索效率产生影响。以自然语言为标识的检索语言最能与现代科学技术发展相适应。信息检索的现代化信息环境形成及信息载体的变革直接影响情报检索的方式和技术。人工创制的检索语言之间的融合 ,以及人工创制的检索语言与自然语言的和谐统一是一种检索语言变化趋势。     

基于汉语科技词系统的专利文献标引及应用研究

文章介绍了利用汉语科技词系统的词表及词间关系对中文专利文献进行主题标引的研究进展,根据专利文献的特点设计了相应的标引策略和流程,并进行实验及结果分析,证明了本标引方案的有效性,最后对标引结果在专利检索中的应用特色进行了介绍。     

文献题名初步研究

阐述文献题名的情报价值、题名用词的规律、各类型文献题名的特点、题名对自动标引和自然语言检索的价值等问题。     

基于空间啮合原理对弧面分度凸轮廓面的研究

弧面分度凸轮的工作廓面复杂，设计繁琐，很难用常规的制图方法绘制。为了将复杂的凸轮机构可视化，实现机构的运动仿真状态，在对弧面分度凸轮轮廓曲面分析的基础上，利用空间啮合原理建立了弧面分度凸轮的轮廓曲面方程。     

中文乐谱编目问题研究

文章在概述乐谱文献特征的基础上,指出当前中文乐谱编目在规则适用性、题名著录、版本著录、乐谱特殊细节项著录以及标引方面存在的具体问题,同时据此提出未来乐谱编目过程的改进措施:加强对乐谱编目规则与细则的研究、规范乐谱题名著录、将乐谱的特定版本标识著录在版本项、重视乐谱特殊细节项著录以及充分考虑乐谱标引。     

Concept integration of document databases using different indexing languages

An integrated information retrieval system generally contains multiple databases that are inconsistent in terms of their content and indexing. This paper proposes a rough set-based transfer (RST) model for integration of the concepts of document databases using various indexing languages, so that users can search through the multiple databases using any of the current indexing languages. The RST model aims to effectively create meaningful transfer relations between the terms of two indexing languages, provided a number of documents are indexed with them in parallel. In our experiment, the indexing concepts of two databases respectively using the Thesaurus of Social Science (IZ) and the Schlagwortnormdatei (SWD) are integrated by means of the RST model. Finally, this paper compares the results achieved with a cross-concordance method, a conditional probability based method and the RST model.     

Indexing strategies for Swedish full text retrieval under different user scenarios

This paper deals with Swedish full text retrieval and the problem of morphological variation of query terms in the document database. The effects of combination of indexing strategies with query terms on retrieval effectiveness were studied. Three of five tested combinations involved indexing strategies that used conflation, in the form of normalization. Further, two of these three combinations used indexing strategies that employed compound splitting. Normalization and compound splitting were performed by SWETWOL, a morphological analyzer for the Swedish language. A fourth combination attempted to group related terms by right hand truncation of query terms. The four combinations were compared to each other and to a baseline combination, where no attempt was made to counteract the problem of morphological variation of query terms in the document database. The five combinations were evaluated under six different user scenarios, where each scenario simulated a certain user type. The four alternative combinations outperformed the baseline, for each user scenario. The truncation combination had the best performance under each user scenario. The main conclusion of the paper is that normalization and right hand truncation (performed by a search expert) enhanced retrieval effectiveness in comparison to the baseline. The performance of the three combinations of indexing strategies with query terms based on normalization was not far below the performance of the truncation combination.     

XML存储模型研究

本文主要研究了XML的各种存储模型,对模型的特点、缺点以及存储效率进行了分析研究。