relational model 中文意思是什麼

relational model 解釋
（關系模型）：以表（或關系）的形式表示數據的數據模型。

  • 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. On the relevant relational model between codcr and bod

    5相關關系模型的探討
  3. 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。
  4. Gis ( geographic information systems ) is a computer system with collecting, checking, intergreting and analysing information which is related with interface of earth. digital terrain model display two demission geographic position and relational properts information with digital pattern. dtm is an important component of gis, and is basic of " digital earth "

    數字地面模型（ digitalterrainmodel ， dtm ）是地表二維地理空間位置和其相關的地表屬性信息的數字化表現，是地理信息系統（ geographicinformationsystem ， gis ）的重要組成部分，是數字地球的基礎。
  5. Finally, interactive time dummy variables are incorporated into the model to highlight the significant relational dynamics in our sample

    最後，通過設置時間虛擬變量來考察各年度的各影響因素對資本結構的影響程度。
  6. Study and improvement of mls relational data model

    多級安全關系數據模型研究及其改進
  7. Involuntarily, questions of these engineering datas " management appear, datas " persistance only depending relational model and rdbms is greatly insufficient, so this paper carefully studies object - relational mapping based on rdbms based on the analyse of home & overseas actualities, correlative theories and realizing methods of object - relational mapping, we find opl based on rdbms is the most suitable for object relatinoal mapping of clera. based on the engineering application analyse of opl in clera, function requirements, database modes, interface criterions and functions, running modes of opl have being detailedly described. with the framework of microsoft dna, a kind of realizing method of opl based on com / dcom / activex component technology has being brought forward, and this paper describes realizing keys from base tables " definition, object id and class hx class and inheritance of class, object storage, parallel control and affair, object query, object nesting, relations between objects, support of complex data types, right control of object and buffer management of object

    本文在分析對象?關系映射技術的國內外現狀、相關理論及實現方法的基礎上，研究發現基於rdbms的opl是目前最適合clera的對象?關系映射方法；在clera的opl應用分析的基礎上，詳細描述了opl的功能要求、數據庫模式、介面規范與功能、運行方式等內容；結合microsoftdna開發框架，提出了一種基於com dcom activex組件技術的opl實現思路，並從基本表定義、對象標識與類標識、類與類繼承、對象存儲、並發控制與事務、對象查詢、對象嵌套、對象間聯系、復雜數據類型的支持、對象級權限控制及對象緩沖管理等幾方面概述了實現要點。
  8. When a query on the relational views is issued, it is repeatedly rewritten using the rules. this process generates number of navigation plans to compute the query ; the cost of these plans is then estimated based on a simple cost model that takes network accesses as the primary cost parameter. in this way, an efficient execution plan is selected for processing the query

    當根據關系視圖發出一個查詢時，它被重復的使用重寫規則來重寫，這個過程產生大量的導航方案來運算查詢。這些方案的代價是根據代價模型來評估的。代價模型是用網路訪問作為原始的代價參數。
  9. Validation of relational - representational complexity model

    表徵復雜性模型的檢驗
  10. 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。
  11. In this paper, the original extended relational model has been improved by adopting mfm in the research of incomplete information database

    本文將三值邏輯謂詞演算系統mf ~ m應用在不完全信息數據庫的研究中，對原有的擴充關系模型做了改進。
  12. Based on field investigation of pavement conditions in the 2nd phase of guangbei section of national highway 108 ( beijing to kunming ), an e - r ( entity - relational ) model database was developed to help organize the numerous data measured in the real road

    通過國道108線廣元段廣北二期工程路面狀況的實地考察，建立了一個e ? r關系數據庫存儲路面狀況信息。
  13. Knowledge representation ; relational model ; intelligent tutor system ; its

    知識表示關系模式智能導師系統its
  14. Client / server structure system is defined as structure of this system this paper analyzed system structure according to the methodology of object - oriented based relational model

    在關系模型的基礎上部分引入了面向對象的概念，按照第三範式完成數據庫的邏輯結構設計。
  15. In autoore, a novel approach to extract java semantic relational model is presented. to get precise object relational result, the java code polymorphism invoke location is formal defined and a program analysis method based on extended class hierarchy graph ( echg ) is proposed

    代碼抽取是oore的起點，從起點開始支持理解是逆向工程的重要目標， autoore在java抽取中，抽取模型採用文中提出的java詞法和語義兩個模型，利用一個基於java擴展類層次圖（ echg ）的多態調用點分析演算法，得到更精確的靜態對象關系。
  16. In this paper, a discussion of construction of the knowledge base by the relational model is presented. we analyze the knowledge into groups, each one called a knowledge point. then, use rm to organize the knowledge points to form two databases ; one is called the attribute database, and the other called linkage database

    同時教學系統還必需具有大量多媒體數據的管理能力，學科知識庫與教學材料庫結合也是一個重要問題。本文使用關系模型討論建立學科知識庫的方法。首先把學科知識分解為知識點，用關系模型來組織知識點，形成知識點屬性庫和鏈接庫。
  17. An object - oriented knowledge representation based on relational model

    基於關系模型的面向對象知識表示
  18. In the past 30 years, the database system has already developed the no relational model, the next generation object - relational database system ( ordbs ), the third generation object oriented database system ( oodbs ). in the 1990s later, for the speed of the internet technique, the website base based on the internet promoted the information resource share

    經過30年的發展，數據庫系統已經歷了第一非關系型數據庫、第二代關系型數據庫（ ordbs ）的發展到面向對象數據庫系統（ oodbs ）和各種專業數據庫。九十年代後由于網際網路絡技術的飛速發展，基於網際網路的網站數據庫技術為信息資源的共享提供了技術上的保障。
  19. The extract process have three steps : constructing echg of java system from java profile, extracting system ' s lexical relational model by scanning source code and analyzing the polymorphism calling location, constructing the semantic model by rule - based model mapping of lexical model

    抽取過程有三個階段：構造系統的echg ，掃描程序的源代碼和多態點分析得到系統的詞法層次模型，通過基於規則的推理轉換詞法模型為語義模型。
  20. Efficient object - oriented system realized by combining object - oriented model and relational model

    對象模型與關系模型結合實現高效的對象系統
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