查询词典 database

Currently, research of parallel databases mainly focuses on relational database, and parallel environments are always based on special parallel architectures. With the rapid expanding of the markets of object-relational database, requests to parallel processing are increasing screamingly Certainly it will be significant to build a parallel objectrelational database. But it is a challenging work too.

本文分析了我国电力系统运行特点及其对短期调度与运行优化提出的要求，针对调度中心能量管理系统的重要组成部分——短期调度与运行优化，应用数学规划的理论和方法，解决复杂水火系统短期经济调度中的水火电计划与调度和电网络运行优化问题。

As the development environment, SQL SERVER 2000 is regarded as the database server , static news of the classification of the news, template, front desk of page self-defining to turn into, and authority and backup person who shrink a series of functions of database , administrator of backstage supporter ,, have finished all functions of a static news briefing system, realize the course has adopted a large amount of JAVABEANs to realize the complicated logic operation to the database and server..

摘要本系统采用JDK 1.4.1作为开发环境，SQL SERVER 2000作为数据库服务器，实现了对新闻类别无限级分类设置，静态新闻的发布修改删除，前台页面的模板自定义和生成，以及后台管理员权限和数据库的备份收缩等一系列的功能，完成了一个静态新闻发布系统的所有功能，实现过程了采用了大量的JAVABEAN来封装对数据库和服务器实现复杂逻辑操作。

The traditional query tree optimization methods,parallel database optimization methods based on left linear trees and right linear trees,bushy trees,and operation of the forest,have their own pros and cons,they have been more in-depth and maturity of the study.The query optimization method based on multiple weighted tree has studied its model of parallel query plan,its complexity model of parallel query plan and query optimization algorithms.The semantic query method transforms an inquiry into one or several semantic equivalence inquiries then has to find and implement a strategy to achieve a better query.Agent-based parallel database query optimization using Multi-Agent technology to automatically search the integrity constraint conditions which are related to the determined query,there for,the efficiency between several relations' joins has been greatly improved.The parallel optimization algorithm,based on genetic algorithm which is suitable for multi-joins of cluster environment,has deeply studied the relations storage options,multi-joins query optimization and query processing and other key technologies based on cluster parallel database.

传统的查询树优化方法，即基于左线性树、右线性树、浓密树、操作森林的并行数据库查询优化方法，各有优劣，对其的研究比较深入、成熟；基于多重加权树的查询优化方法，研究了其并行查询计划模型、并行查询计划的复杂性模型和查询优化算法；语义查询优化方法将一个查询变换成一个或数个语义等价的查询，进而寻找并执行这些等价查询中具有较好实现策略的一个；基于Agent的并行数据库查询优化采用Multi-Agent技术自动查找与给定查询有关的完整性约束条件，使得多个关系间连接操作的效率得到很大的提高；基于遗传算法的并行优化算法，深入研究了基于机群并行数据库中关系存储的选择、多连接查询优化和查询处理等关键技术。

With these values defined, WordPress will use the designated database characterset and database collation (ie sort order of the letters, numbers, and symbols of a character set) when connecting a database tables.

与这些价值观的界定，在WordPress将使用指定的数据库字符集和数据库的整理（即排序顺序的字母，数字和符号的字符集）时，连接数据库表。

The database of this system is based on Microsoft Visual Database Tools built in Visual Basic 6.0.And the interface of this system is made of costumed windows and system windows. combines At the same time, we use band control and DAO for accessing database and SQL for the implement of finding operation. and use SQL inquire about definitely Realize the book, the stock, to finish granting relevant to operate it teaching materials of teaching materials of teaching material on the basis of this.

本系统的数据库是通过可视化数据管理器建立起来的，而系统的界面采用了自定义窗体和系统窗体相结合的方式制作；同时，系统采用绑定控件访问数据库和数据访问对象访问数据库两种访问方式，并使用SQL查询语言对系统查询功能进行编码并在此基础上实现教材的预订、教材的库存、教材的发放等相关操作。

The Database,Union Catalog Database of Chinese,Western letters, Japanese and Russia, its plat is on base Web journal database applications server, The Documentation and Information Center of CAS...

中国科学院文献情报中心牵头研建的"全国中西日俄文期刊联合目录数据库"正是这样的 Web平台期刊数据库应用系统，本文简要阐述了该数据库的概况、网络服务系统的功能特点、服务对象和方式及其进一步扩展的服务功能

UserID and Password are stored in an database, in the case of this sample, the database is a SQL Server 2005 Mobile database.

用户名和密码存储在数据库，在这个样本情况下，该数据库是SQL Server 2005移动数据库。

Given the difference in database management systems, it is clear to see why the Versant database uses an object database for its projects.

鉴于不同的数据库管理系统，很清楚地看到为什么Versant数据库使用一个对象数据库的项目。

China Infosearch engine consists of distributed parallel spider, whole-lengthsearch database, intelligent information processing model,CGI and smart browser, etc. It supports whole-length search, concept search basedon language database and concept search based on knowledge database.

首信搜索引擎主要由分布式并行Spider、全文检索数据库、智能信息处理模块、CGI和智能浏览器等模块构成，支持全文检索、基于语料库的概念检索和基于知识库的概念检索。

Database time types and the relationship between database time and bitemporal database has been discussed. Combining the space and time, the notion of spatio-temporal model was educed.

结合空间和时间，引出了时空数据模型的概念，重点回顾了前人的研究成果，讨论了各种时空概念模型的各自特点。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。