支持重用的可视化通用查询界面的生成

对查询界面的规律性进行了研究，在软件重用的基础上，提出了可视化通用查询界面生成模型，使得查询界面的简单生成及复用成为可能。在此基础上，建立了查询界面组件模板库，开发了支持查询界面生成的COM接口。     

异构集成系统中面向查询规划的数据源能力描述框架

由于异构数据源集成系统需要集成包括WWW在内的各种数据源，有些数据源既无规则的模式结构，又无强有力的查询功能，给查询规划造成一定的困难．在分析异构集成系统中查询规划生成需求的基础上，引入数据源能力描述的概念，进而提出数据源能力描述框架．该框架以数据源局部模式与中介模式的语义映射以及数据源查询能力的描述为支撑，较好的满足了查询规划的需求，并为查询优化提供保证．在此基础上，设计了一个基于数据源能力描述的查询规划系统框架，并通过一个完整的例子说明数据源能力描述框架在查询规划中的应用．     

基于信息约束的数据库查询界面的自动生成

在分析了现有数据库用户查询界面和条件生成在数据库应用中存在的问题后，基于面向对象的概念，提出了可视对象数据描述表结构、信息来源和取值方式等约束的用户查询界面和条件的生成方法，并给予了形式化描述。查询条件的生成采用的是合取范式的标准形式，用户界面的生成采用了标准的可视对象。该方法已经得到了实现，并在实际系统中获得了应用。     

计算机档案管理系统中查询界面及条件生成的新方法

针对传统的计算机档案管理系统中查询界面及条件生成的实际问题和用户要求,提出了查询界面条件生成的一个新方法。设计了一个包括用户界面、参数处理、条件形成。设计了一个包括用户界面、参数处理、条件形成、维护等在内的查询界面及条件生成系统的总体框架,并以此为基础,详细描述了该系统的各个基本功能及其相互关系。实践证明,该系统可以体现用户的查询思想,用户易于掌握和接受。     

基于贝叶斯网络的XML文档查询模型

目前XML查询语言及查询界面对Web用户过于复杂,该文描述了一种XML文档索引机制,在此基础上建立了一个通用的贝叶斯网络查询模型。用户只需在交互界面输入自然语言描述的查询,系统就能对其实现基于语义的构造,由它生成多个结构化查询;对这些查询建立贝叶斯网络,计算查询在给定文档下的概率,选择概率最大的前3个查询提交给系统执行。     

Key-Tree：一种增强目录索引接口有限查询能力的方法

限于目录索引接口的查询能力．为了优化采用这种接口的信息查询系统．讨论了通用的基于目录索引的信息查询系统，提出一种优化算法通过对查询条件和查询结果进行分析、提取．构造出相关文档的关键字树．并基于关键字树对查询进行重写．生成由关键字组成的新的查询序列．使用生成的关键字序列重新搜索文档．比较两次查询结果并对其进行优先级排序．输出优化后的查询结果。实验结果证明本文提出的查询优化方法能够获得具有更高查全率(recall)和查准率(precision)的查询结果。     

一种基于决策树的构件查询方法

在基于构件的软件开发中，构件查询是影响软件开发效率的关键性问题．为了降低复用者的查询难度。提高构件查询效率，提出将决策树方法引入构件查询过程中，从软件开发项目的构件查询历史信息中获取决策信息。辅助构件查询．在对传统构件查询过程进行分析的基础上，首先对决策树方法与构件库查询过程结合的需求进行了探讨I然后针对如何利用构件查询历史信息建立决策树，如何利用决策树进行构件查询，以及如何对决策树规则集进行存储等关键问题给出了解决方案，提出了一种基于决策树的构件查询方法．还对基于该方法搭建的构件查询系统的基本功能进行了介绍，并给出了该系统的一个应用实例．     

基于禁忌GEP的分布式数据库查询优化算法

为了更好地解决分布式查询优化问题,论文在传统GEP算法的基础上,结合禁忌搜索策略,提出了基于禁忌GEP的分布式数据库查询优化算法（DistributeddatabasequeryoptimizationalgorithmbaseduponTabu-GEP,DDQO-TGEP）。仿真实验表明,随着查询关系个数的增加,DDQO-TGEP算法执行查询时所需要的查询优化时间和最优查询策略生成时间都比传统的GA和GP算法显著下降,其中查询优化时间最大下降约42．16％,最优查询策略生成时间最大下降约36．8％。     

基于查询子句生成的查询系统

本文针对现有的查询系统的缺点,提出了一种新的查询系统的构造方法,称为TTQSGS（Three-tie Query Substatement Generation System)模型,该模型将查询子句生成系统与应用程序界面分开,这样构成的查询系统具有安全灵活,可扩展的特征。     

管理信息系统MIS通用查询模块的设计与实现

本文在实践的基础上设计并实现了全中文通用查询模块，利用ＳＱＬ语言实现了多条件联合查询一大突破，该模块有操作简单、界面友好、集成度高的优点，使操作人员仅需通过Ｗｉｎｄｏｗｓ窗口便可实现模糊查询、单条件、多条件联合查询。并具有打印报表输出的功能。     

HyperFile: A data and query model for documents

Non-quantitative information such as documents and pictures pose interesting new problems in the database world. Traditional data models and query languages do not provide appropriate support for this information. Such data are typically stored in file systems, which do not provide the security, integrity, or query features of database management systems. The hypertext model has emerged as a good interface to this information; however,finding information using hypertext browsing does not scale well. We developed a query interface that serves as an extension of the browsing model of hypertext systems. These queries minimize the repeated user interactions required to locate data in a standard hypertext system. HyperFile is a prototype data server interface. In this article, we describe HyperFile, including a number of issues such as query generation, query processing, and indexing.     

Visual spatio-temporal function-based querying

Visual interfaces are very important for human interactions in cyberworlds. Visual spatio-temporal querying should be one of the basic tools for data mining and retrieval in cyberworlds. In this paper, we propose a novel function-based query model for arbitrary shape spatio-temporal querying. The queries are defined as geometric shapes changing over time. In our model, data are interpreted geometrically as multidimensional points with time dimension or as moving points. The queries are formulated with geometric objects and operations over them to form the query solid changing over time. The proposed query model allows us to pose arbitrary shape spatio-temporal range queries. With the uniform geometric model we integrate visual mining and querying of time-dependent data employing 3D visualization tools. It allows for creating an intuitive visual interface using 2D projections of 3D query shapes. Our approach combines visualization of spatio-temporal data with visualization of the range query formulation employing very compact function-based query model. The implemented visual query system and its visual interface are proposed and described. An example of application of the system in analysis of simulation results in molecular dynamics is considered.     

Querying through a user interface

In contrast to a traditional setting where users express queries against the database schema, we assert that the semantics of data can often be understood by viewing the data in the context of the user interface (UI) of the software tool used to enter the data. That is, we believe that users will understand the data in a database by seeing the labels, drop-down menus, tool tips, or other help text that are built into the user interface. Our goal is to allow domain experts with little technical skill to understand and query data. In this paper, we present our GUi As View (Guava) framework and describe how we use forms-based UIs to generate a conceptual model that represents the information in the user interface. We then describe how we generate a query interface from the conceptual model. We characterize the resulting query language using a subset of the relational algebra. Since most application developers want to craft a physical database to meet desired performance needs, we present here a transformation channel that can be configured by instantiating one or more of our transformation operators. The channel, once configured, automatically transforms queries from our query interface into queries that address the underlying physical database and delivers query results that conform to our query interface. In this paper, we define and formalize our database transformation operators. The contributions of this paper are that first, we demonstrate the feasibility of creating a query interface based directly on the user interface and second, we introduce a general purpose database transformation channel that will likely shorten the application development process and increase the quality of the software by automatically generating software artifacts that are often made manually and are prone to errors.     

Querying through a user interface

In contrast to a traditional setting where users express queries against the database schema, we assert that the semantics of data can often be understood by viewing the data in the context of the user interface (UI) of the software tool used to enter the data. That is, we believe that users will understand the data in a database by seeing the labels, drop-down menus, tool tips, or other help text that are built into the user interface. Our goal is to allow domain experts with little technical skill to understand and query data. In this paper, we present our GUi As View (Guava) framework and describe how we use forms-based UIs to generate a conceptual model that represents the information in the user interface. We then describe how we generate a query interface from the conceptual model. We characterize the resulting query language using a subset of the relational algebra. Since most application developers want to craft a physical database to meet desired performance needs, we present here a transformation channel that can be configured by instantiating one or more of our transformation operators. The channel, once configured, automatically transforms queries from our query interface into queries that address the underlying physical database and delivers query results that conform to our query interface. In this paper, we define and formalize our database transformation operators. The contributions of this paper are that first, we demonstrate the feasibility of creating a query interface based directly on the user interface and second, we introduce a general purpose database transformation channel that will likely shorten the application development process and increase the quality of the software by automatically generating software artifacts that are often made manually and are prone to errors.     

QBD*: a graphical query language with recursion

A system to query databases using diagrams as a standard user interface is proposed. The system, called Query by Diagram* (QBD*), makes use of a conceptual data model, a query language on this model, and a graphical user interface. The conceptual model is the entity-relationship model. The query language, whose expressive power allows recursive queries, supports visual interaction. The main characteristics of the interface are ease of use and the availability of a rich set of primitives for schema selection and query formulation. The expressive power of QBD* and G⁺, which are the only languages allowing recursive queries to be expressed graphically are compared     

Deep Web查询接口选择

越来越多的信息隐藏在Web查询接口之后,在此情况下如何寻找与用户查询最相关的数据源接口就变得越来越重要。文中提出了一种Deep Web查询接口选择算法,该算法是完全依赖于查询接口特征的。给定大量异构的Deep Web数据源,目标是选择与用户查询最相关的查询接口集。通过对实际查询接口特征的观察,发现了查询接口上谓词间的相关性。基于此发现,设计了一种基于共同出现谓词相关度模型的数据源选择算法,用于选择与用户查询最相关的查询接口集。     

基于最大熵分类器的Deep Web查询接口自动判定

Web中包含着海量的高质量信息,它们通常处在网络深处,无法被传统搜索引擎索引,将这样的资源称为Deep Web。因为查询接口是Deep Web的唯一入口,所以要获取Deep Web信息就必须判定哪些网页表单是Deep Web查询接口。由于最大熵模型可以综合观察到的各种相关或不相关的概率知识,对许多问题的处理都可以达到较好的结果。因此,基于最大熵模型的分类性能,利用最大熵分类算法自动判定查询接口。并通过实验,将最大熵分类法与其它常用分类方法进行了比较,结果显示它的分类性能优于Bayes方法和C4.5方法,与SVM方法相当,表明这是一种非常实用的查询接口分类方法。     

VB+SQL图书信息功能设计研究

VB(Visual Basic)是可以制作界面的软件开发工具,它拥有图形用户界面,并且使用很方便。SQL(SQL Server)是微软生产的用于数据管理和数据分析的软件产品,在Client/Server、Browser/Server的体系结构中都可以作为后台数据使用。图书信息功能是图书管理系统中的一个功能模块。文章详细介绍了VB+SQL图书信息功能模块的设计原理和具体的操作步骤,包括登录界面、图书信息输入、图书信息修改、图书信息删除和图书信息查询这五个具体功能点,并在此基础上对VB+SQL类开发实践进行了总结。     

面向旅游领域的Deep Web接口查询研究

Deep Web蕴涵丰富的分类信息,是融合型在线旅游业务良好的数据源。本文对Deep Web接口模式进行分析,提出了接口集成方案的流程和领域实例库的建模方法,并就酒店查询业务进行了对方案的评估。测试结果显示,在对接口页面一定积累的基础上,可以达到较高的模式匹配准确率,从而保证了Deep Web接口的正确的自动查询。