entity-relation diagram 中文意思是什麼

entity-relation diagram 解釋
實體關系圖
  • entity : n. 1. 實體;統一體。2. 存在(物)。3. (有別于屬性等的)本質。
  • relation : n 1 說話,敘述,報告;故事。2 關系,聯系;〈pl 〉(利害)關系,交情;〈pl 〉國際關系。3 親戚關系...
  • diagram : n. 圖,圖形,圖解;【數學】作圖。 a diagram of an engine 發動機設計圖。vt. (-gram(m)ed; -gram(m)ing) 用圖表示,圖解。
  1. The system design includes information model, function design and dada - base logical relation. the information model is established by entity - relation method, and the e - r picture is ploted, and the in - out diagram is gived out ; the fuction designed is established by idef0 method, the subsystems are designed according to the model in detail, we give out the explaining document and explain the calculation method for the model ; we design the data - base logical relation by the above models, decide the distributing and partition the relation diagram of the data - base, then define the logical structure of the diagrams

    其中信息建模採用實體-聯系的方法建立系統的信息模型,並用idef1x圖表示出該信息模型,同時給出電泵物資管理系統輸入輸出信息表;功能設計用idef _ 0方法建立電泵物資管理系統分系統功能模型,參照功能模型對內部各子系統進行詳細設計,給出分系統功能模塊的詳細說明書及相應功能演算法描述;數據庫邏輯設計依據系統分析結果、信息模型及功能模型,確定電泵物資管理系統數據庫分佈,劃分數據庫內部關系表,定義表的具體邏輯結構。
  2. 2 after the research for engineering database, combining this system specific engineering database demand, establish the entity - relationship diagram for cutting parameter engineering database and convert the entity - relationship diagram to relation model

    2通過對工程數據庫的研究,結合本系統中切削參數工程數據庫要求,建立了切削參數工程數據庫的實體?聯系模型,並將實體?聯系模型轉換為關系模型。
  3. It consists of demanding analysis, system structure, data flowing diagram, function module and the application of key techniques, takes and organizes offer parameter and data, uses entity - relation ( e - r ) pattern to design data pattern, selects ms sql server 7 as database, founds database physical structure

    說明了基於c s和b s混合結構模式的設計與實現,包括系統的需求分析,系統的解決方案,系統的體系結構、數據流圖、功能模塊圖以及各關鍵技術的應用。
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