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Secondly , rdb , oodb and ordb are studied . three sdbms performance be analyzed and compared , moreover their advantages and disadvantages are pointed out . then , depended on the practical technology , a new type resolve scheme is presented for database management system which was developed by chinese ( dm3 ) 在空間數據的這種發展趨勢下，本課題分別研究了關系型空間數據庫、面向對象型空間數據庫和對象關系型空間數據庫的技術特點和結構體系，并對三種數據庫在性能上做出比較，分析了三種空間數據庫優勢與不足。
Clsm , afm and tem testified the deposition of these drugs and the experiments carried out in ( 1 ) different initial incubation concentration , ( 2 ) different temperature , ( 3 ) different nacl concentration and ( 4 ) different ph revealed that the drugs have a relative high deposition efficiency in the high initial incubation concentration , high temperature , high nacl concentration and high ph environment , and relatively stable release properties in the low initial incubation concentration , low temperature , high nacl concentration and low ph environment 在( 1 )不同初始濃度、 ( 2 )不同溫度、 ( 3 )不同鹽濃度和( 4 )不同ph值下對模型藥物rdb和抗癌藥物dnr沉積和釋放的研究發現高初始濃度、高溫、高鹽和高ph值環境下有利于藥物的沉積；而低初始載藥量、低溫、高鹽和低ph值環境下，沉積后的藥物則具有相對平緩的釋放性能。
Then , make a further study on the basis of the theory of relational data base ( rdb ) and oriented - object relational data base ( oordb ) : discuss the corresponding relation between uml modeling technology and rdb and oordb , and the cases of oordb are modeled by uml modeling technology 然后在基于關系數據庫、面向對象-關系數據庫的理論基礎上作更進一步的研究：討論了uml建模技術與關系數據庫及面向對象-關系數據庫的對應關系，并利用uml建模技術對面向對象-關系數據庫進行實例建模。
This paper emphasize on the research of security strategy of large rdb based on b / s three - tier system structure , and discuss of the data security management strategy from every side of account management , authority management , view management , rule management , audit monitor , data dictionary track . this paper , which use orient - object model designing idea , design and realize a common data security control of application system 本論文側重研究基于b s三層體系結構下的大型關系數據庫的安全機制，從用戶管理、授權機制、靜態設置、角色管理、審計監控、數據跟蹤，多側面、多角度討論了數據安全管理策略，并且利用面向對象建模思想，在《龍口港信息系統》中構建并實現這種通用模型? ?數據庫安全控制器dbsc的設計理念。
Synchronized update between xml view and bottom rdb up to now , the updating on xml as well as the synchronized updating on integrated xml and rdb have not been studied systematically . the author proposes a protocol of xml update language ( xul ) and also studies the technique on syntax merging between xul and xquery . by implementing the transformation from xul to sql and setting up a synchronized operating mechanism , the consistency between xml view and the bottom rdb is assured Xml視圖與底層rdb的同步修改技術針對國內外尚未系統l展xml修改及其與pb集成后的同步修改技術的研究現狀，提出一種xml修改語言原型xul （ xmlupdatelanguage人研究了xul與xquery的語法融合方法；通過設計xul到sql的轉換方法及其同步執行機制，實現了xml視圖與底層rdb數據的一致性；提出了“主動修改”的概念并討論了其實現的關鍵技術。
Aiming at this problem , the main research issues and achievements in this paper are as follows : bi - directional data transformation between rdb and xml with semantic constraints preserved for most of existing researches on static data transformation between xml and rdb , dtd is taken as the schema description language for xml , and the semantic constraints are often lost during the transformation process . to overcome these disadvantages , the author adopts xml - schema , a standard schema description language proposed by w3c to replace dtd , as the description method owing to its more powerful functions than dtd , and of course with the syntax much more complicated . after analyzing the constraints characteristics in both xml - schema and relational schema , a semantic constraints - preserved algorithm is proposed which can realize the bi - directional schema mapping between rdb and xml through a formalized description of xml based on regular tree and a general expression for relational schema based on direct graph approach 保留語義約束的xml與rdb雙向靜態數據轉換技術現有研究大多采用dtd ( documenttypedefinition ，文檔類型定義)作為xml的模式描述語言，并且在模式映射過程中丟失語義約束信息，本文分析了xml - schema ( xml - schema采用與dtd完全不同的語法，數據描述能力更強同時也更為復雜，已被w3c確定為替代dtd作為xml模式描述語言的標準)及關系模式的語義約束特征，通過基于正則樹的xml形式化描述方法以及基于有向圖的一般關系模式表示方法的研究，建立保留語義約束的xml - schema與關系模式的雙向模式映射算法，實現了xml與rdb的雙向數據轉換，較好地解決了xml與rdb在靜態數據轉換層面的數據集成問題，可有效滿足企業大量rdb數據面向xml的發布以及與日俱增的xml數據存入rdb的應用需求。
In ddmm , the rdb is taken as the bottom storing medium and the upper xml view is set up for data exchange and direct application under internet / intranet environment . based on ddmm , the multi - tiered and bi - directional data integration technique between xml and rdb , is studied systematically and in detail , and the reciprocal data accessing and exchange between rdb and xml is carried out on respectively three levels : static data transformation , dynamic data query and synchronized data update . the infrastructure for manufacturing informationlization will certainly be internet / intranet , and xml has been a factual standard for data representation under internet / intranet environment 制造業信息化的基礎平臺將是internet intranet ， xml ( extensiblemarkuplanguage ，可擴展標記語言)已經成為internet intranet環境下數據表達的事實標準，而目前企業大量數據仍存在于占主導地位的關系數據庫( relationaldatabase ，簡稱rdb )中，如何在rdb與xml之間架起數據交換與數據操作的橋梁，已成為制造業在internet intranet環境實現信息化迫切需要解決的突出問題之一。
There is way too much going on in this file to explain it all in this short introductory article , but a few things are key to understanding how websphere ejb to rdb mapping works . it is not my intention to tell you how to generate this file from scratch , but instead to explain what it does so that you ll be able to make small changes to this file and the others we ve covered in order to handle simple challenges in cmp mappings with websphere 要在這篇短小的介紹性文章中全面解釋這個文件，就要講很多，但對于理解websphere ejb到rdb的映射工作，有幾點很關鍵：我的目的并不是告訴您如何從頭生成這個文件，而是想說明它做什么工作，這樣您就能夠對這個文件（和其它我們已討論過的文件）做一些小的更改來應對使用websphere進行cmp映射過程中的簡單問題。
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 面向對象數據庫系統( oodb )是數據庫管理系統的一個發展方向，但是還非常不成熟，把關系型數據庫( rdb )和面向對象數據庫系統( oodb )進行集成己成為一種勢在必行的趨勢，本論文工作就是對基于關系模型的引信系統數據庫進行了的面向對象的擴展，使系統開放性好，易于維護。
This army approval platform is based of the rdb workflow engine technique . the technique is implemented by java language . it advanced and detailed introduced the workflow model supported by dbflow engine based of existed workflow model especially the inherited workflow architecture 該部隊審批平臺基于關系數據庫的工作流引擎( dbflow )技術,整個技術由java實現,根據已有的工作流模型提出并詳細介紹了dbflow工作流引擎所支持的工作流模型。
With the development of database technology , a large scale relation database ( rdb ) , object - oriented database ( oodb ) and object - relation database ( ordb ) get mature little by little on integrality , security , standardization , prevalence and so on 目前，隨著數據庫技術不斷發展，大型關系型、對象關系型、純對象型數據庫在完整性、安全性、標準化、開放性、可擴充性等方面日益完善，一般都提供對變長字段的支持。
The author selected the rdb design software vfp , used the visual and object - oriented programming technique . in the end the command and communication database system structure has been constructed , based on e - r model , function - depended and standardization analysis 選擇關系模型數據庫設計軟件vfp ，采用可視化面向對象的程序設計技術的，通過e - r模型、函數依賴和規范化分析，建立了指揮通信系統數據庫體系結構。
However , currently in enterprises , most data is still stored in traditional rdb . how to integrate xml and rdb to realize the reciprocal data accessing and exchange has become one of pivotal problems to be resolved 針對這一問題，本文提出了“以rdb為底層數據存儲載體、通過建立xml視圖進行數據交換及直接internet intranet應用”的雙重數據管理機制的構想。
As the basis of the ddmm , the static data transformation mechanism proposed allows users to operate the bottom data in rdb by querying or updating through the corresponding xml view Xml與rdb之間的雙向靜態數據轉換也為構建“雙重數據管理機制”奠定了基礎，使用戶能夠面向xml視圖通過檢索、修改等方法操作底層rdb數據。
In detail , hkbe takes use of rdb to represent , store and maintain production rules , converts the structureless production rules into a linear structure and stores the latter in rdb 具體說來，采用關系型數據庫技術來表示、存儲及維護產生式規則，將非結構化的產生式規則轉換為結構化的線形結構，同時存儲在關系型數據庫中。
The paper also introduced the research and implement of the workflow module and the voucher module based on mvc . some policy were analyzed in mapping result of ood into rdb 結合工程實踐討論了i - oa系統中工作流模塊和憑證處理模塊的設計與實現，闡明了將面向對象的設計結果映射轉換為關系數據庫的規則和策略。
Under the drive of requirement and technology , how to resolve the question of storing xml data by using an rdb and publishing relational data as an xml document is a hotspot 在需求和技術的驅動下，如何解決基于關系數據庫的xml存儲和出版是近年來研究人員比較關注的一個課題。
The driver must render the product version in this form but can also append the product - specific version as a string for example , “ 04 . 01 . 0000 rdb 4 . 1 “ 驅動程序必須以此格式呈現產品版本信息，但也可以以字符串的形式（例如， 04 . 01 . 0000 rdb 4 . 1 ）追加產品特定的版本號。
However , to make incremental changes to the mapping of the cmp entities to the database tables , you need to launch the ejb - to - rdb mapping wizard on the existing back end with the 選項的后端上啟動ejb - to - rdb mapping向導。如想了解詳細信息，請見ejb文檔。

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rdb RDB ＝Research and Developmen...

rdf

However , to make incremental changes to the mapping of the cmp entities to the database tables , you need to launch the ejb - to - rdb mapping wizard on the existing back end with the 選項的后端上啟動ejb - to - rdb mapping向導。如想了解詳細信息，請見ejb文檔。