数据库

The on-line system can obtain the latest search results while the search speed is low; The off-line system speeds the query processing by means of preprocessing, but the disadvantage lies in expensive cost needed to preprocess again once the database is updated.

关系数据库上的现有数据库关键词检索系统可分为在线和离线两大类，它们都难以兼顾查询效率和效果：在线系统能够获得数据库最新结果，但速度较慢；离线系统使用预处理提高查询速度，但若数据库更新就要重新执行预处理。

Database is the new database that Baidu builds to enact a new rank law, in this database in establishing a procedure, should a lot of people discover how his website didn't appear in Baidu for some time afore not the Description part of capture website, and the website of others appears in afore-mentioned phenomena, from this we can conclude it is OK that Baidu is building new B database get test and verify, the website appeared in Baidu today's phenomenon, we should OK know Baidu has been in for next rank regulation prepares, and it is important that the next will not rank influence of regard as of label of Keywords, Description will not rank influence of regard as of label of Keywords, Description regular Baidu element, even it is met throw the helve after the hatchet, turn and should do new Description to affecting the rank of website keyword with the content of own capture, corresponding do later those who optimize is difficult will increase, and Baidu will let good website appear as far as possible searching an user at the moment, so we are the following heavy name a person for a particular job meets be website oneself content to rise!

数据库算是百度为了制定一套新的排名规律而建立的新数据库，在这个数据库的建立过程中，应该有很多人在前一段时间发现怎么自己的网站没有出现在百度不抓取网站的description部分，而别人的网站出现在上述现象，从这一点上我们可以推断百度在建立新的B数据库应该可以得到验证，网站在百度中出现了今天的现象，我们就应该可以知道百度已经在为下一个排名规则做准备，而下一个排名规则百度将不会把keywords、description标签看做影响排名重要因素，甚至它会完全放弃，转而用自己抓取的内容当做新的description影响着网站关键词的排名，相应的以后做优化的难将会加大，而百度将会尽可能让好网站呈现在搜索用户眼前，那么我们以后的重点将会是网站自身内容的提高！

In addition, a new synchronization scheme, Double-Timestamp Transaction-Level Synchronization model is put forward to solve the synchronization problem under the 3-tier replication architecture (Mobile Client - Synchronization Server - Database Server). DTSTLS utilizes a novel double-timestamp strategy to promote the efficiency of synchronization. Besides, it ensures serializability and consistency of the mobile database system through transaction-level conflict reconciliation.Mobile transaction processing is another key technology to provide efficient information service in mobile computing environment.

通过引入一种乐观并发控制方法与两段锁协议相结合的移动事务处理机制，本文重点解决了交互式长事务的问题，并提供了对移动主机任意移动性和数据库系统一致性的支持；在移动对象数据库方面，本文提出了一种新的移动对象数据库模型—离散时空轨迹移动对象数据库模型，重点阐述了DSTTMOD模型中的位置表示方法及位置更新处理策略，并分别给出了基于GRID文件和基于QUAD树的移动对象索引算法。

This thesis also gives a detailed description of the consistence between database design and database document design and states how to use good of LaTeX to typeset database document and use Java technology to transform document into database table.

对于数据库设计与数据库文档设计的一致性比较，本文也做了一定的研究，阐述如何利用LaTeX的优点进行数据库文档的排版以及利用Java 技术直接将文档转化为数据库表。

Methods CNKI, Wanfang data, VIP data, CBMdisk, MEDLINE,EMBASE,BIOSIS and Cochrane Central Register of Controlled Trials database and literature were searched, to include randomized controlled trails that used LMD alone or combined with traditional Chinese medicine.

计算机检索中国期刊全文数据库、万方中国学位论文全文数据库、维普期刊全文数据库、中国生物医学文献数据库、MEDLINE、EMBASE、BIOSIS以及Cochrane对照试验注册资料库鉴定文献，加上手工检索中文发表及未发表的文献。

Based on the operating feature of hydrographical database system,this paper discusses the reasons that may cause potential troubles in the system.

基于海道测量数据库系统的运行特点，分析了数据库可能产生的故障及原因，并通过研究Oracle数据库管理系统各种备份方案，提出了实用的海道测量数据库备份与恢复策略。

By the application server of MS, CATV operators can access the database server to independently manage the users. The network bottleneck, performance descent brought by the overabundant connection of database and load balance of business process is solved effectively, and the response time of database and system security is improved.

各有线电视网络运营商可通过管理系统的应用服务器，访问数据库服务器，达到了用户的独立管理，有效地解决了网络瓶颈和数据库连接数量过多造成的数据库性能下降的问题，实现业务处理负载均衡，提高了数据库响应速度，同时使系统的安全性得到提高。

The records in hierarchical databases are organized in a treelike structure, with each level of records branching off into a set of smaller categories.

在非结构化的数据库中，按照实体的一个简单列表组织记录；在非结构化的数据库中，按照实体的一个简单列表组织记录；很多个人计算机的简易数据库是非结构的(在结构上是扁平很多个人计算机的简易数据库是非结构的在结构上是扁平树型结构组织记录的)。

When we develop applications, we undirectly handle database, in other words, operations of database is transparent to coder.

在实际实现时，可以直接对数据库进行操作，也可以对每张表建立一个对应的对象，这个对象封装了对数据库的访问，当我们编写应用程序的时候就可以不直接与数据库打交道，访问数据库的事对我们是透明的。

ER semantics contributes to correcting segmentation ambiguity and partially solving unlogged words problem at segmentation stage, to generating semantic consistent grammar trees and reducing parsing ambiguity at parsing stage, to simplifying semantic process at semantic process stage.

为了更好地了解用户使用中文进行数据库查询的句式以及从中抽取一定的语法规则，我们进行了用户使用受限汉语书写数据库查询语句的调查和分析，然后在此基础上我们设计了一种新的文法GWERSC，其非终结符集合不仅采用了现代汉语的文法符号，如名词短语、助词等，同时还采用了与数据库概念紧密相关的实体、属性、联系等语义符号，这样就把现代汉语尤其是受限汉语的知识和数据库知识紧密结合起来，既有利于文法分析又简化了语义处理。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。