e-r diagram 中文意思是什麼

e-r diagram 解釋
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  • e : （pl E s e s ）1 英文字母表第五字母。2 【音樂】E調，E音。3 E字形。4 〈美國〉（順序）第五等，（成...
  • r : 1 〈拉丁語〉 recipe 【醫學】處方。2 radical 3 Reaumur 4 〈拉丁語〉 Rex Regina 5 radius 6 ratio 7 ...
  • 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. Chapter five describes the implementation of fuda management system. the dfd ( date flow diagram ) and e - r ( entity - relationship ) diagram of the three key parts of the system ( production, sales and stock ) are presented hi detail

    第五章是富達管理系統實現，包括銷售管理、庫存管理和生產管理三個部分，重點說明第三、第四章中討論的生產計劃和調度部分的系統實現。
  2. 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。
  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。
  4. The main research contents are as follovvs : after the analyzing of the process of making train diagram, according with its character, and take into account the trend of innovation, chooses the total solution based on the b / s architecture, 3 - tier operation distributed and 2 - tier data distributed to separate the data from operation and simplify the development and maintenance ; the e - r data model that is accord with the 3nf criterion is designed after analyzing the data structure of the train diagram system. emphasis on the permission security of the distributed system, take the view schema, coupled with the login authentication and permissions validation, to ensure the data accessing domination, and take the synchronization, error control, and restore capability to advance the data security ; on the basis of b / s solution architecture, after comparing the existing transportation technologies, b - isdn and adsl is selected as the major solution architecture based on the package - svvitched networks. furthermore, error control, firewall, and encryption techniques are introduced to prevent the hacker attack and ensure the networks safety

    論文的主要研究內容包括：對目前我國列車運行圖管理體制和編制流程進行詳細分析，根據其「幾上幾下」的特點，並結合未來「網運分離」體制改革的變化預測，選擇採用與之相適應的基於b s體系架構、三層業務分佈、二層數據分佈的整體方案，實現業務與數據的分離，降低開發與應用過程的復雜度和總體成本；對列車運行圖系統的數據信息進行分析，設計符合3nf規范的數據e - r關系模型，並著重研究處于分散式系統中的列車運行圖數據信息的訪問權限和數據安全問題，提出以視圖模式結合用戶識別權限審定實現數據權限劃分，以並發處理、容錯技術、恢復技術提高系統的數據安全性；在基於b s架構的系統整體方案基礎上，對當前多種數據傳輸技術進行分析比較，採用b - isdn為主幹網、 adsl為接入端的基於公用數據網路分組交換技術的系統網路體系結構，並針對網路自身安全性和黑客攻擊與侵入問題，詳細討論綜合採用差錯控制、防火墻、數據加密解密等技術手段提高系統的網路安全性能。
  5. The main task of this paper is to describe the model of relation database and meilan airport mis, and applies its basic idea into projects to solve the practical problem of meilan airport mis. at first, this paper introduces the theory, technology and method of rdbms, and also describes the implementation method and procedure of meilan airport. we also give you the e - r diagram and database flow drawings and the method of how to create database objects ( tables, views, triggers, procedure and so on ) 0 the paper also describes ordbms and replication in ibm db2 5. 2

    並根據美蘭機場航班信息管理系統的實際需要，設計了符合關系模型的、規范化的數據庫，並給出數據庫系統結構設計e - r圖和數據流程圖，詳細論述了在db2中數據庫設計的方法和過程，數據庫對象（ tablespace 、 trigger 、 view 、 schema 、 procedure等）創建的技巧和應用，對ibmdb25 . 2中實現面向對象的數據庫的概念、 db2中定時備份航班數據及如何在db2中實現分散式數據庫的數據庫復制（ replication ）進行了探討和應用。
  6. At the initial system development, an in - depth study and meticulous research was conducted on enterprise equipment spare parts management related business processes, based on this, using rational rose development tool, system operational flow charts, functional block diagram was created mapping out the corresponding data e - r entities, and completed equipment spare parts management system database design

    系統開發初期，對企業設備備件管理相關業務流程進行了深入、細致的調研，在此基礎上，採用rationalrose開發工具，建立了擬開發系統的業務流程圖、功能結構圖，繪制出相應的數據e - r實體圖，完成了設備備件管理系統的數據庫設計。
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