With the development of computer network technology , especially the development of internet , an enterprise - level inter - os and portable distributed multi - tiered database system is becoming into an important research direction in the range of database application 随着计算机网络技术的发展，特别是internet技术的发展，使得具有跨平台和可移植性能的分布式多层次数据库应用成为数据库设计和开发领域的主要研究方向之一。
The ibm information management system is ibms premier transaction and hierarchical database management system , the product of choice for critical online operational applications and data where support for high availability , performance , capacity , integrity , and low cost are key factors Ims是ibm最早的事务和层次数据库管理系统，它非常适合支持高可用性、高性能、高容量、高完整性和低成本的关键性联机操作应用程序和数据。
Learn how the ibm information management system , ibms premier transaction and hierarchical database management system , is focusing on enterprise modernization through integration and open access with a service - oriented architecture available on demand Ibm信息管理系统（ ibm information management system ， ims ）是ibm最早的事务和层次数据库管理系统。本文学习它如何通过利用一个随需应变、面向服务的体系架构来进行集成和开放访问从而达到企业的现代化。
The thesis explains the systematic structures , the basic functions of index storehouse , web multi - level databases and other constitutes . not in detail introduces its realization principles and systematic frameworks , and , combining the module function flow charts of realization , states the whole systematic realization course 并且详细介绍了该系统的实现原理、系统构架以及索引库、 web信息资源搜索、多层次数据库、数据仓库、数据预处理和数据挖掘等功能模块的构建，并结合模块的功能实现流程图，陈述了整个系统的实现过程。
This system is set up on the existing search engine foundations through web services " technology , has solved variety and non - structural web data with xml technology , has formed web multi - level data base , and constructed the system structure in high performance of data warehouse , utilized midas technology to form the high - performance index storehouse structure , has remedied the deficiency of search engines at coverage , accuracy etc , and improved efficiency of information retrieval 该系统通过webservices技术，建立在现有搜索引擎基础之上，以xml技术解决了多样性和非结构性的web数据转换，形成了web多层次数据库，利用了web挖掘面向结构化或半结构化数据的智能化数据抽取和知识发现过程，并且构造了数据仓库的高性能查询体系结构? hpqs ，利用midas技术形成了高性能索引库结构，弥补了当前搜索引擎在覆盖范围、准确率、复杂查询语言的使用和结果表现方式等方面的不足，改善了信息检索的效率。
The thesis recommends the concepts , relevant technology of web mining and information retrieval , and trends both at home and abroad at first , describes commonly methods and tools nowadays , realizes the synthesis intelligent engine system of iwmes on the basis of web data mining and multilevel database 论文首先介绍了web挖掘和信息检索的概念、相关技术以及国内外发展现状与趋势，描述了现今常用的web挖掘方法和工具，提出并实现了基于web挖掘和多层次数据库的综合智能化web挖掘引擎系统? iwmes ( intelligentwebminingenginesystem ) 。
The technology of database develops from hiberarchy database , retiform database to relational database , even oo database , that has become to the base of information system . since 90 ' s , as a kind of language of network programming , java makes best use of network resources and it ' s portable , cross - platform , reusable and extendable 数据库技术经历了从层次数据库、网状数据库到关系数据库以及面向对象数据库的发展，已成为计算机信息系统中的重要基础和支柱，并在传统的商业和事务处理等领域内趋于成熟。
