A survey of partition schemes and relevant algorithms in object oriented database systems 面向?qū)ο髷?shù)據(jù)庫(kù)的分割模式及分割算法綜述
Object oriented database has experienced the phases which are permanent language system , object - relational system and pure object oriented system 面向?qū)ο髷?shù)據(jù)庫(kù)系統(tǒng)的發(fā)展經(jīng)歷了持久化面向?qū)ο笳Z(yǔ)言系統(tǒng),對(duì)象關(guān)系型系統(tǒng)和純面向?qū)ο笙到y(tǒng)等幾個(gè)階段。
For storage , we choose native xml model based storage . data model is tree model , and basic storage structure is b - tree on top of object oriented database system 對(duì)于數(shù)據(jù)存儲(chǔ),采用基于模型的原生xml存儲(chǔ)方法,數(shù)據(jù)模型為樹(shù)模型,以b樹(shù)作為存儲(chǔ)結(jié)構(gòu),底層存儲(chǔ)采用面向?qū)ο蟮拇鎯?chǔ)管理系統(tǒng)。
Comparing with object oriented database , which has appeared nowadays but not much mature and practically , relational database is widely used to store and retrieve data based on rational modeling 由于面向?qū)ο髷?shù)據(jù)庫(kù)還不成熟,對(duì)象/關(guān)系數(shù)據(jù)庫(kù)雖然有所發(fā)展,但是出于應(yīng)用傳統(tǒng)以及方便與遺留系統(tǒng)的集成的因素,關(guān)系存儲(chǔ)模型仍然被廣泛使用。
Oodbms support all the characteristics of objects . pure object oriented database management system which supports all the characteristics is advanced on concept and technology , but much lagging on the capacity of supporting traditional data type 純面向?qū)ο笮蛿?shù)據(jù)庫(kù)系統(tǒng)( oodbms )支持對(duì)象的所有特性,在概念上和技術(shù)上無(wú)疑是先進(jìn)的,但在支持傳統(tǒng)數(shù)據(jù)類型的性能方面要遜色的多。
Since oodb ( object oriented database ) is not fully developed , ( although it is the direction of the database system . ) the combination of the rdb ( relation database ) and oodb has been an unavoidable tendency . the work done in this research is just an oo extension of fuze database system based on the relation model , which makes the system better in openness , and easy to maintain 面向?qū)ο髷?shù)據(jù)庫(kù)系統(tǒng)( oodb )是數(shù)據(jù)庫(kù)管理系統(tǒng)的一個(gè)發(fā)展方向,但是還非常不成熟,把關(guān)系型數(shù)據(jù)庫(kù)( rdb )和面向?qū)ο髷?shù)據(jù)庫(kù)系統(tǒng)( oodb )進(jìn)行集成己成為一種勢(shì)在必行的趨勢(shì),本論文工作就是對(duì)基于關(guān)系模型的引信系統(tǒng)數(shù)據(jù)庫(kù)進(jìn)行了的面向?qū)ο蟮臄U(kuò)展,使系統(tǒng)開(kāi)放性好,易于維護(hù)。
And the study of user ' s knowledge model includes seizing users " interest in their special domain , building and optimizing model , dealing with user ' s feedback , etc . at the end of the paper an application named sokey system is given out in textile industry . the system ' s whole structure and working flow are introduced and the dynamical refreshment of web pages , the automatic query of document information , segment browsing of result information , receiving and sending of user " information have been realized by using active server page 3 . 0 , insert language of vbscript and object orient database technology on the platform of windows2000 server 最后,本文給出了在紡織化纖領(lǐng)域的一個(gè)應(yīng)用實(shí)例- - - sokey系統(tǒng),介紹了sokey系統(tǒng)的總體架構(gòu)和工作流程,并在windows2000server平臺(tái)上使用activeserverpage3 . 0 、 vbscript等嵌入式編程語(yǔ)言和面向?qū)ο蟮臄?shù)據(jù)庫(kù)技術(shù),完成了網(wǎng)頁(yè)信息的動(dòng)態(tài)刷新、文檔信息的自動(dòng)查詢、結(jié)果信息的分段瀏覽、用戶信息收發(fā)等功能模塊,使用vc完成了網(wǎng)絡(luò)信息自動(dòng)捕獲模塊。