relational database model 中文意思是什麼

relational database model 解釋
數據庫模型
  • relational : adj. 有關系的；親戚的；（特指語法上）表示關系的。adv. -ly
  • model : n 1 模型，雛型；原型；設計圖；模範；（畫家、雕刻家的）模特兒；樣板。2 典型，模範。3 （女服裝店僱...
  1. Third, this dissertation analyzes the complicacy of result size estimation problem for xml structure based query optimization compared to its counterpart in traditionally relational database, and proposes a full - featured result size estimation algorithm for xml query, sxm. for simple path expression query, this dissertation proposes a dynamic synopsis model for xml data based on the concept of f - stable and b - stable, xmap. for complicated path expression query, this dissertation adopts an improved bifocal sampling method for result size estimation

    第三，分析了xml結構化查詢優化中的查詢代價估計問題與傳統關系型數據庫中的查詢代價估計問題的區別，提出了一套完整的xml結構化查詢代價估計體系sxm ，包括對簡單路徑表達進行查詢代價估計的動態xml數據統計模型xmap ，對復雜路徑表達進行查詢代價估計的雙焦點例舉法，以及對值匹配條件進行查詢代價估計的基於小波的多維直方圖方法，並能將多種查詢表達的查詢代價估計結果結合在一起，以給出一個完整的xpath查詢的代價估計。
  2. Translate the cws ( or other clinical database ) relational database into an xml stream and re - constitute the data in a better normalized data model

    將cws （或者其他的臨床資料庫）相關資料庫轉化成一個xml流，並且重建一個較好的規?化資料模型上的數據。
  3. As the rdbms ( relational database system ) can hardly adapt the requirement of non - traditional application, such as incompetence of model representation, low system with a combination of 00 language, sematic, model, complex object and database system. it absorts the merit of the oodbms and the rdbms, it inherit the mature technology of the rdbms, on the other hand, it import the technology of the 00, so it can boost up the ability of handle complex object, etc

    它針對關系數據庫系統（ rdbms ）不能適應非傳統應用的要求，如：模型表達能力有限，系統效率低、事務模型太簡單等，結合面向對象語言、語義模型、復雜對象模型和數據庫的幾個方面的研究而形成的一個高度數據集成化系統。
  4. In the 1970s, the rigorous mathematical work of e. f. codd and others created the now - ubiquitous relational database model

    70年代， e . f . codd與其他一些人通過嚴格的數學工作創造了現在無處不在的關系數據庫模型。
  5. The content of this paper mainly includes investigation content and methods of electronic multi - media military geographic documentations, the data model of multi - media database ( the object - oriented multi - media data model, the extended relational data model, the hyper - text multi - media model ), the general and detailed design for multi - media database and the connecting technique between foreground application and background database, which includes odbc, mfc odbc, dao, ole db and ado

    本文的主要內容包括多媒體電子兵要地誌的研究內容和方法；多媒體數據庫數據模型（面向對象的多媒體數據模型、擴充的關系數據模型、超文本的多媒體數據模型和融合型數據模型） ；多媒體數據庫的總體設計和詳細設計；前臺應用程序與后臺數據庫的多種連接技術，包括odbc 、 mfcodbc 、 dao 、 oledb和ado技術。
  6. To manage data storage, many database management system are now available, like oracle, ms sqlserver, db2, infomix, sybase and mysql etc. these systems are all based on the theory of relational data model, and can provide us with strong functions on data storage management

    在數據的存儲方面，有oracle ， mssqlserver ， db2 ， informix ， sybase ， mysql等成熟的數據庫服務器產品提供比較完善的功能。這些建立在關系數據理論上的產品無論是在功能、效率還是安全等方面可以說完全能夠滿足現有數據存儲的需要。
  7. While xml enthusiasts have begun to see everything in the world encoded with xml tags, the relational database model is entrenched and most of the world s digital data is encoded in tables that are composed of rows and fields

    雖然xml的狂熱者可能將世界上的一切都看成是用xml標簽編碼的，單關系數據庫模型仍然根深蒂固，世界上大部分數字數據是用由行和列組成的表來進行編碼的。
  8. The thesis has implemented the datatype model of the air transportation information system database with the objected - oriented relational database oracle9i using the structured query language, loaded the air transportation information into the database and built the view of the database considering the needs of the application

    本文應用面向對象的大型關系數據庫產品oracle9i建立了空中交通管理信息數據庫的數據模型，將空中交通信息導入空中交通管理信息數據庫，同時根據數據庫應用開發的需要建立了應用開發視圖。
  9. As virtual database uses relational data model, the paper makes a special effort to discuss query rewriting technology - rewriting queries using views and its conjunctive query, containment mapping under this model

    基於虛擬數據庫所採用的關系數據模型，著重探討了該模型下的查詢重寫技術? ?利用視圖重寫查詢以及基於其上的合取查詢、包含映射等問題。
  10. Sql server compact edition is a powerful, yet lightweight relational database engine that makes it easy to develop desktop applications by supporting familiar structured query language syntax and providing a development model and api consistent with sql server

    Sql server compact edition是功能強大又輕巧的關聯式資料庫引擎，可支援常用的結構化查詢語言structured query language ， sql語法，並提供與sql server一致的研發模式及api ，因此可便於開發供桌上型電腦使用的應用程式。
  11. Sql server 2005 compact edition is a powerful, yet lightweight relational database engine that makes it easy to develop desktop applications by supporting familiar structured query language syntax and providing a development model and api consistent with sql server

    Sql server 2005 compact edition是功能強大又輕巧的關聯式資料庫引擎，可支援常用的結構化查詢語言structured query language ， sql語法，並提供與sql server一致的研發模式及api ，因此可便於開發供桌上型電腦使用的應用程式。
  12. Research on geographical relational database model in webgis

    中的地理關系數據庫模型研究
  13. Generally, the research of knowledge discovery is based on relational database, database reduction algorithm based on relational database directly obtains core of database, attributes reduction and rule reduction by operator in relational database. it is a simple and effective. essentially, rough relational database model in this paper, which extending classical rough sets model, is a multi - valued information system

    知識發現研究的實施對象多為關系數據庫，基於關系數據庫操作的數據庫約簡演算法利用關系數據庫的操作運算元直接對數據庫進行求核、屬性約簡和規則約簡，該方法充分發揮數據庫操作的簡便高效性，使得數據庫約簡演算法簡單易實現。
  14. Rough relational database model and its relational operations

    關系數據庫模型及其關系操作
  15. Are consistent with those in the relational database model

    Dataset中的方法和對象與關系數據庫模型中的方法和對象一致。
  16. But mapping class hierarchies to a relational database model might prove somewhat difficult

    但是，把類的層次結構映射到關系數據庫模型，可能會比較困難。
  17. Abstract : temporal relational database model is extended from relational database by adding time processing ， and temporal object - orient database model is extended from object - orient database by adding time processing

    文摘:時態關系數據庫在關系數據庫的基礎上擴充了對時間數據的處理，而時態面向對象數據庫則是在面向對象數據庫的基礎上擴充了對時間數據的處理。
  18. This paper makes use of how to build the object model for the system utilizing object - oriented tecnique in the system implement and the process of the mapping from object model to the relational database model in order to build database

    依據所提出的產開發過程模型，說明了基於動程的產品開發建模方法? dmpa 。利用面相對象技術建立系統對象模型的方法，以及對象模型向關系數據庫的映射，建立數據庫。
  19. Secondly, we study on how to build the object model for the system utilizing object - oriented technique in the system implement and the process of the mapping from object model to the relational database model in order to build the model of the relational database for the system

    接著，研究了利用面向對象技術建立系統對象模型的方法，以及對象模型向關系數據庫的映射過程，進而建立了系統的信息模型。
  20. The definition of multi - valued information system is extended and the spatial structure of rough relational database model is analyzed in this paper. the measurement of uncertainty in rough database is provided. by analysis of the spatial structure of rrdb, the upper approximation, the lower approximation and value - reduced is educed. it provides the foundation for more studies in rough relational database model

    本文分析了粗糙關系數據庫模型的空間結構，為粗糙數據庫的不確定性進行度量提供一個依據，同時通過對粗糙關系數據庫空間結構的分析，導出了基於粗糙關系數據庫的上、下近似以及值約簡，為粗糙關系數據庫模型的進一步研究提供了理論基礎。
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