【正文】 Inter 電子郵件過濾器的設(shè)計畢業(yè)論文Inter 電子郵件過濾器的設(shè)計畢業(yè)論文摘 要隨著網(wǎng)絡技術(shù)的不斷發(fā)展和應用技術(shù)的不斷推廣，在日常生活中的各個方面，我們都離不開網(wǎng)絡信息技術(shù)，信息技術(shù)正以前所未有的速度和范圍改變著我們的生活和工作。但是隨之誕生的垃圾郵件也成為互聯(lián)網(wǎng)領(lǐng)域的一重大難題。因此研究和設(shè)計高效率的垃圾郵件過濾系統(tǒng)有著重要的研究意義。首先，本文對垃圾郵件的背景及研究意義做了簡要概述，并且對國內(nèi)外的研究現(xiàn)狀與最新過濾技術(shù)進行說明。然后對垃圾郵件相關(guān)知識的進行研究，闡述了垃圾郵件的發(fā)展狀況以及危害，隨后研究了電子郵件的工作原理和相關(guān)郵件協(xié)議。本文是基于內(nèi)容而設(shè)計的垃圾郵件過濾器，通過對一些郵件過濾技術(shù)的優(yōu)缺點進行分析，最終選出以樸素貝葉斯算法為理論基礎(chǔ)設(shè)計了垃圾郵件過濾器。文本分類領(lǐng)域普遍會運用貝葉斯算法，它具有廣泛的應用性，而垃圾郵件過濾本質(zhì)上是文本分類問題，所以選用貝葉斯算法進行設(shè)計郵件過濾器。其次，通過比較選用更加合理有效的郵件預處理技術(shù)(包括郵件內(nèi)容提取，郵件解碼，中文分詞，特征詞提取，特征庫等)，從而更好的設(shè)計出垃圾郵件過濾器。最后，利用 Java 語言實現(xiàn)了垃圾郵件過濾系統(tǒng)，并且進行了實際應用層面的測試，實驗結(jié)果具有可靠性和實用性，在對基于中文的垃圾郵件分類與過濾取得了令人滿意的效果。關(guān)鍵詞：電子郵件；郵件過濾；電子郵件過濾系統(tǒng)；樸素貝葉斯算法Inter 電子郵件過濾器的設(shè)計畢業(yè)論文ABSTRACTWith the continuous development of work technology and application technology unceasing promotion, in all aspects of daily life, We cannot leave the work information technology, information technology is changing at an unprecedented speed and scope of our life and work. But with the birth of spam has bee a major problem in the field of the Inter. So the research and design efficient spam filtering system has important research significance.First of all, this paper make a brief overview of the background and research significance of spam , and account for domestic and foreign research present situation and the latest filtering technology. Then study the knowledge about spam, expound the developing situation of spam and harm, then the paper studied the Email the working principle and the related agreement. This article is based on the content of spam filters designed, through the analysis of the advantages and disadvantages of some mail filtering technology, finally choose the design on the theory of naive Bayes algorithm spam filters. Common in text categorization using Bayesian algorithm, it has extensive applicability, and spam filtering is essentially a text classification problem, so the article choose Bayesian algorithm design mail filters. Secondly, through the parison， choosing more reasonable effective Email pretreatment techniques (including mail content extraction, decoding, Chinese word segmentation, key words extraction, feature library, etc.), and thus designing better spam filters.Finally, using the Java language to realize the spam filtering system, and carring out the actual application layer surface test, the result of the experiment has reliability and practicability, the filtering spam classification and based on Chinese satisfactory results have been achieved.Key Words: Email。 Mail filtering。 Email filtering system。 naive Bayes algorithmInter 電子郵件過濾器的設(shè)計畢業(yè)論文 I 目 錄1 緒論 ..........................................................................................................................................1 選題背景和研究意義 ........................................................................................................1 選題背景 ....................................................................................................................1 研究意義 ....................................................................................................................2 國內(nèi)外研究動態(tài) ................................................................................................................2 最新過濾技術(shù) ....................................................................................................................3 論文主要內(nèi)容和章節(jié)安排 ................................................................................................4 主要內(nèi)容 ....................................................................................................................4 章節(jié)安排 ....................................................................................................................42 垃圾郵件過濾的基礎(chǔ)知識和相關(guān)技術(shù) ..................................................................................6 電子郵件過濾基礎(chǔ)知識 ....................................................................................................6 電子郵件工作原理 ....................................................................................................6 電子郵件相關(guān)協(xié)議 ....................................................................................................7 電子郵件過濾方法 ............................................................................................................9 基于來源的郵件過濾 ................................................................................................9 基于內(nèi)容的垃圾郵件過濾 ......................................................................................10 本章小結(jié) ..........................................................................................................................113 垃圾郵件過濾相關(guān)技術(shù) ........................................................................................................13 基于內(nèi)容過濾的貝葉斯分類算法 ..................................................................................13 貝葉斯技術(shù)簡介 ......................................................................................................13 貝葉斯技術(shù)原理 ......................................................................................................13 樸素貝葉斯算法 ..............................................................................................................14 基本原理 ..................................................................................................................14 樸素貝葉斯技術(shù)在郵件過濾中的應用 ..................................................................15 本章小結(jié) ..........................................................................................................................194 郵件過濾系統(tǒng)的總體設(shè)計 ....................................................................................................20Inter 電子郵件過濾器的設(shè)計畢業(yè)論文 II 系統(tǒng)設(shè)計及流程 ..............................................................................................................20 主要模塊設(shè)計 ..................................................................................................................21 郵件