【正文】 ...................................... VI UML定義 ................................................... VI 文獻檢索的定義 ............................................. VI 文獻檢索的背景和發(fā)展歷史 .................................. VII 本文所做的主要工作 ....................................... VIII 2 UML主要內(nèi)容和建模過程 ............................................. IX UML的主要內(nèi)容 ................................................... IX UML的事物 ................................................. IX UML中的關(guān)系 ............................................... IX UML中的圖 ................................................. IX UML建模過程 ................................................... XIII UML建模概述 ............................................. XIII 實際建模過程 .............................................. XIV 3 基于 UML的科技文獻檢索系統(tǒng)的分析和設(shè)計 ............................ XIV 科技文獻檢索系統(tǒng)簡介 ............................................ XIV 科技文獻檢索系統(tǒng)需求分析 ......................................... XV 系統(tǒng)功能分析 ............................................... XV 建立用例模型 ............................................. XVII 科技文獻檢索系統(tǒng)面向?qū)ο笙到y(tǒng)分析和設(shè)計 ........................ XXIII 面向?qū)ο笙到y(tǒng)分析 ........................................ XXIII 系統(tǒng)數(shù)據(jù)庫設(shè)計 ................................................. XXVI 科技文獻檢索系統(tǒng)的數(shù)據(jù)庫的需求分析 ....................... XXVI 4 數(shù)據(jù)庫的概念結(jié)構(gòu)設(shè)計 ............................................. XXVI 數(shù)據(jù)庫的邏輯結(jié)構(gòu)設(shè)計 ..................................... XXVI 數(shù)據(jù)庫的物理設(shè)計 ........................................ XXVII 5 總結(jié) ........................................................... XXVII 6 參考文獻 ...................................................... XXVIII 基于 UML 的科技文獻檢索系統(tǒng)的分析與設(shè)計 1 緒論 本課題研究的背景及建模意義 研究背景 伴隨著計算機技術(shù)的發(fā)展，在運用系統(tǒng)軟件的分析和設(shè)計中，如果運用系 統(tǒng)軟件由上百個或者更多的對象構(gòu)成，僅憑普通的分析很難整理整個 的 系統(tǒng)結(jié)構(gòu)，同時，為了利于大中型運用軟件的維護和利用，在具體寫代碼之前為系統(tǒng)建立相應(yīng)的模型是很有必要的。 關(guān)鍵字： 科技 文獻 ； 檢索系統(tǒng)； UML；數(shù)據(jù)庫 基于 UML 的科技文獻檢索系統(tǒng)的分析與設(shè)計 Abstract UML is a standard modeling language,it bines a variety of excellent objectoriented modeling method,as well as a variety of licensed software engineering method.,due to the elimination of the inconvenience brought by the method of independent of each other, it through a uniform representation, so that different knowledge background analysis, developers and users can easily talk. The use of UML on the use of system modeling, in the analysis and design of phase to establish a good system model, based on the model design and coding, can reduce the cost of development, indenting the development cycle, reduce development risk, so as to ensure the correct implementation of the system. Science and technology document retrieval system is a system engineering, the traditional retrieval model has been unable to adapt to the current user demand for document retrieval, the retrieval model, is proposed based on UML modeling language under B / S mode of science and technology literature retrieval system analysis and design. Along with the information technology in the information retrieval of more indepth and wide range of application, document retrieval system has been gradually implemented in the technical maturity. To efficiently to the needs of the rapid information retrieval, we must improve information retrieval models, namely the use of more intuitive, object oriented retrieval mode, established with its own characteristics to adapt to the science and technology literature retrieval system. This paper introduces the modeling in the UML language environment analysis and design of a science and technology literature retrieval system process. Create a set of effective programs. This paper introduces the literature retrieval system analysis, including feasibility analysis, business process analysis。本文介紹了在 UML建模語言 環(huán)境下 分析與設(shè)計 一個 科技文獻 檢索系統(tǒng)的過程。運用 UML對運用系統(tǒng)進行建模，在分析和設(shè)計階段建立良好的系統(tǒng)模型，根據(jù)建立的模型進行設(shè)計和編碼，可以降低開發(fā)成本，縮進開發(fā)周期，減少開發(fā)風(fēng)險，從而保證系統(tǒng)的正確實施。 科技文獻 檢索系統(tǒng)是一項系統(tǒng)工程 ,傳統(tǒng) 的檢索模式 已無法適應(yīng)當(dāng)前 用戶對文獻的檢索需求 ,針對當(dāng)前 的檢索模式 ,提出了基于 UML建模語言 下 B/S模式 的科技文獻 檢索系統(tǒng)的 分析與 設(shè)計 。創(chuàng)建了一套行之有效的方案。 system design part mainly introduced the system function design and based on UML model The paper mainly introduced this topic development background, system analysis, system design, system model for the analysis and design of database. Keywords: Science and technology literature。模型是對事物的一種抽象，人們在建造實體之前，通常都先建立相應(yīng)的模型，以便更直觀，更透徹的理解個了解它的本質(zhì)，抓住其中問題的關(guān)鍵。 UML(Unified Modeling Language 標(biāo)準(zhǔn)建模語言 )是在綜合了著名的 Booch方法、 OMT方法和 OOSE方法的基礎(chǔ)上形成的一種建模語言。在以前，文獻檢索主要依靠人力手工檢索，其弊端也顯而易見，檢索效率更是十分低下。使用 UML進行建?？梢越档拖到y(tǒng)的 開發(fā)風(fēng)險，有效的控制整個的開發(fā)過程，維護