查询词典 database key

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。

Share the additionally a bit experience that plays me to make a station with everybody additionally, actually key word of the day on pop chart of dog of Baidu, search, week is very useful, it mirrorred near future netizen to be opposite the attention heat of what incident, what we need to do is the card that blends in these key word to us go among caption, but content is not certainly as pop chart content, but the content that can reflect key word, so to search engine, key word had, of content different those who let it believe us is to be achieved formerly, is not blind follow suit on the net duplicate, some key word it won't expire forever, we often blend in the key word of seniority to us inside the caption of all sorts of cards, as time passes, our forum it is dictionary of a keyword, I today Baidu spider assimilate to the word that is a deadbeat, so the heaven that my station is dish of all sorts of fastfood, name, to deadbeat that is greatest temptation.

另外跟大家分享下我做站的另外一点经验，其实百度、搜狗排行榜上的日、周关键字是很有用的，它反映了近期网民对哪些事件的关注热度，我们需要做的是把这些关键字融入到我们的帖子标题当中去，但是内容不一定是跟排行榜内容一样的，但是能反映关键字的内容，那么对于搜索引擎来说，关键字有了，内容的不同让它相信我们的是原创，而不是盲目的网上跟风复制，有些关键字它是永远都不会过期的，我们经常的把排行的关键字融入到了我们各种帖子的标题里面，久而久之，我们论坛它就是一部关键词字典，我今天把百度蜘蛛比作是一个食客的话，那么我的站就是各种小吃、名菜的天堂，对于食客来说那是莫大的诱惑。

First of all, the structure from the message, the message is divided into 3 parts: the first message, at the style, MAC address, so that packet transmission to reach the safety of the international financial sector standards; Secondly, the encryption method from the point of view, this The most prominent of the two systems were encrypted administrator password is encrypted on the card to encrypt passwords, especially for card encryption, the use of soft encryption service interface technology, using the work key, master key, the original password through the ciphertext key algorithm through two different DES encryption key to come up, we can imagine, I want to work at the same time key, master key, the text of the original secret password to a more difficult task, If the re-solution of the two DES, can be said to be completely impossible!

首先从报文结构上来看，报文分为3部分：报文头、报文体、MAC地址，使报文传输的安全性达到了国际金融行业的标准；其次，从加密方式来看，本次系统最突出的两个加密分别是对管理员密码进行加密、对卡密码进行加密，特别是对卡密码的加密，运用的是软加密服务接口技术，运用工作密钥，主密钥，原始密码通过算法得到密钥密文通过两次不同的DES加密才得出的密钥，可想而知，想要同时得到我的工作密钥，主密钥，原始密码密文本来就比较困难了，要是再解两次DES，可以说是完全不可能实现的！

RETRIEVAL STRATEGY: The relevant articled were searched for in Pubmed database by researcher of this article with the key words of "stent graft, covered stents, cerebrovascular disease" in English, and with the key words of "covered stent, cerebrovascular disease" in Chinese in VIP database. 223 English and 196 Chinese articles were selected and reviewed primarily.

检索策略：由该论文的研究人员应用计算机检索Pubmed数据库的相关文献资料，以"stent graft， covered stents， cerebrovascular disease"为检索词，共检索到223篇相关文献，应用维普数据库以"带膜支架，脑血管疾病"作为检索词，共找到196篇中文文献。

dwpi patent database of thomson group was chosen, led signal display technology patents between january 1, 1965 to december 31, 2008 were collected and the associated patent database was established. derwent innovation index patent analysis system was chosen, these led signal display technology patents were analyzed deeply from the total amount of patent applications, key led patents and key patent holders respectively. the present patent status of abroad and china's were compared. the patent strategy of developing our nation's led signal display technology was also discussed.

选择thomson集团的dwpi英文专利数据库，采集1965年1月1日到2008年12月31日期间的led信号显示技术专利文献，建立英文专利数据库；再选择derwent innovation index专利分析系统，分别从专利申请总量、重点专利技术和重点专利持有人等方面，对led信号显示技术专利进行深入的分析，并对比分析国内外led信号显示技术专利的现状，提出发展我国led信号显示技术的专利策略。

Compared with the first generation database designed in Access by National Conge nital Heart Surgery Database Committee, our database is more complex with full p otential, which can totally meet the needs of clinicians and researchers in the study of congenital heart defects and can provide remote information data sharin g digital platform.

该数据库系统与美国心胸外科协会应用Access系统开发的第一代数据库比较，功能更加完善，能够充分满足临床管理、医学统计、科研应用等要求，并可为远程信息共享互换提供数字化平台。

Distributed database system is a main research direction in the database field. Maintaining the data consistency is a critical technical problem in the distributed database system .

分布式数据库系统是数据库领域中的一个主要研究方向，数据一致性维护是分布式数据库系统中的一个非常关键的技术问题。

The technique of Delphi database steered the in-depth study and the appliance, and the library of cardinal consummation paraquinones managed the system's demand analysis, function shuttering cake the curtate, database the modal analysis, amalgamation to have this design the database structured the sumed the appliance of procedured.

本文结合中小型图书馆管理系统，对数据库管理系统、SQL语言原理、Delphi应用程序设计，Delphi数据库技术进行了较深入的学习和应用，主要完成对图书馆管理系统的需求分析、功能模块划分、数据库模式分析，并根据具体要求设计了数据库结构和应用程序。

He has extensive experience in all facets of database systems development, including developing and teaching database and data modeling classes, systems analysis and design, database and system administration, and data analysis.

他在数据库系统发展的所有方面中有广泛的经验，包括发展与教学数据库和数据靠模切班级、系统分析和设计、数据库和系统行政、数据分析等等。

Database Master is a powerful database development, management and administration software for the MySQL, PostgreSQL and SQLite database systems.

数据库大师是一个功能强大的数据库开发，管理和管理软件的MySQL，PostgreSQL和SQLite数据库系统。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。