Studies on Multimedia Database Systems with Advanced View Functions

具有高级视图功能的多媒体数据库系统研究

基本信息

批准号：
03452289
负责人：
KAMBAYASHI Yahiko
金额：
$ 4.42万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

项目摘要

In the first year, we formalized advanced view concepts, and studied indexing methods for efficient view computations. In the second year, we presented a framework of name placemenet functions which are important for constructing graphical user interfaces to retriere results from databases. We clso evaluated an experimental system based on the framwork. In the third year, the final year, we implemented a prototype system to prove that our approach are useful and practical using geographic databases as experimental databases.Major results are as follows.1.Virtual Hypermedia Based on Database ViewsWe presented a general model to integrate database views and view components of Graphical User Interfaces.2.Generation of Graphical Interactive Objects with Compromises between Users' Requirements and Display Limits.We formaized a mechanism to control the amount of display data according to importance levels assigned to classes which are data retrieved from databases.3.Name Placement Functions for Concurrent Work EnvironmentsThe concept of a concurrent work environment is introduced and a prototype system is developed for executing name placement functions after retrieving from databases.4.An Environment of Generating Interacitve Maps Utilizing Reuses of Database Query Formation Process.We formalized a framwork to improve naive queries including ambiguity, errors, and incompleteness into feasible queries using knowledge-bases concerning map productions.5.Semantic Constraints Intergrity and Efficient Processing Methods for Data Produced in Cooperative Work Environments.We studied am efficient method to generate complex views in cooperative work environments.6.Efficient Query Processing for Views of DatabasesIf "super key conditions" are satisfied, which we proposed, for materialize views, update processes of the materialized views are guaranteed to be efficient.

在第一年，我们形式化了高级视图概念，并研究了高效视图计算的索引方法。第二年，我们提出了一个名称 placemenet 函数的框架，这对于构建图形用户界面以从数据库检索结果非常重要。我们还评估了基于该框架的实验系统。第三年，即最后一年，我们实现了一个原型系统，以地理数据库作为实验数据库，证明我们的方法是有用和实用的。主要成果如下：1.基于数据库视图的虚拟超媒体我们提出了一个集成的通用模型图形用户界面的数据库视图和视图组件。2.在用户需求和显示限制之间进行折衷的图形交互对象的生成。我们形成了一种机制，根据分配给检索数据的类的重要性级别来控制显示数据量3.并发工作环境的名称放置功能引入了并发工作环境的概念，并开发了一个原型系统，用于从数据库检索后执行名称放置功能。4.利用数据库查询形成的重用生成交互式地图的环境流程。我们使用有关地图制作的知识库，形式化了一个框架，以将包括歧义、错误和不完整性在内的简单查询改进为可行的查询。5.语义约束协作工作环境中产生的数据的完整性和高效处理方法。我们研究了一种在协作工作环境中生成复杂视图的有效方法。6.数据库视图的高效查询处理如果满足我们提出的“超关键条件”，则实现视图，物化视图的更新过程保证是高效的。