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基于網(wǎng)頁關(guān)鍵詞的SEO分析

2023-02-28    分類: 網(wǎng)站建設(shè)

基于網(wǎng)頁關(guān)鍵詞的SEO分析

網(wǎng)頁關(guān)鍵詞對(duì)于SEO來說,應(yīng)該說不并陌生。關(guān)鍵詞調(diào)研、關(guān)鍵詞布局這些都屬于關(guān)鍵詞優(yōu)化范疇?;诰W(wǎng)頁關(guān)鍵詞的SEO分析。

基于詞頻統(tǒng)計(jì)是對(duì)關(guān)鍵詞的出現(xiàn)次數(shù)進(jìn)行加權(quán)分析,根據(jù)各特征項(xiàng)對(duì)網(wǎng)頁內(nèi)容的貢獻(xiàn),經(jīng)過多次統(tǒng)計(jì)學(xué)習(xí)完成。在HTML文檔中,各詞條在不同內(nèi)容的網(wǎng)頁中所呈現(xiàn)出的頻率分布是不同的,因此可根據(jù)類別詞的頻率和標(biāo)記特性進(jìn)行權(quán)重評(píng)價(jià)。

一個(gè)有效的特征項(xiàng)集必須具備以下兩個(gè)特性:完全性,特征項(xiàng)能夠體現(xiàn)目標(biāo)內(nèi)容;區(qū)分性,根據(jù)特征項(xiàng)集,能將目標(biāo)同其他文檔相區(qū)分。如何用計(jì)算類別詞的權(quán)重來確切地表示網(wǎng)頁類別,除了要求能理解正文的含義之外,還需有總結(jié)概括的能力或有較深的領(lǐng)域知識(shí)。根據(jù)網(wǎng)頁文檔和標(biāo)記信息,提取類別詞權(quán)重可以選擇對(duì)揭示網(wǎng)頁的主題內(nèi)容具有更加重要的作用的標(biāo)記,如標(biāo)題()、強(qiáng)調(diào)(<EM>)等標(biāo)記。提取類別詞權(quán)重的步驟如下:</p><p>(1)計(jì)算每個(gè)類別詞在網(wǎng)頁中出現(xiàn)的次數(shù);</p><p>(2)統(tǒng)計(jì)標(biāo)題(<TITLE>)所標(biāo)記信息的類別詞,如果有,在該類別詞計(jì)數(shù)器中加一個(gè)整數(shù)TO;</p><p>(3)統(tǒng)計(jì)一級(jí)標(biāo)題(<H1>),二級(jí)標(biāo)題(<H2>),三級(jí)標(biāo)題(<H3>)所標(biāo)記信息的類別詞,如果有,在該類別詞計(jì)數(shù)器中分別加一個(gè)整數(shù)T1,T2,T3;</p><p>(4)統(tǒng)計(jì)強(qiáng)壯(<strong>)、強(qiáng)調(diào)(<EM>)所標(biāo)記信息的類別詞,如果有,在該類別詞計(jì)數(shù)器中加一個(gè)整數(shù)T4,T5;</p><p>(5)找出超文本中的一些關(guān)鍵句,對(duì)在關(guān)鍵句中出現(xiàn)的類別詞,除進(jìn)行上述處理外,再在相應(yīng)的計(jì)數(shù)器中加一個(gè)整數(shù)T6;</p><p>(6)對(duì)于一些特殊的領(lǐng)域,根據(jù)受限自然語言理解技術(shù)和有關(guān)專家的意見,設(shè)立其他加權(quán)方案進(jìn)行加權(quán),對(duì)一些專有名詞加一個(gè)整數(shù)T7;</p><p>(7)處理同義詞或蘊(yùn)含詞。在出現(xiàn)的多個(gè)同義詞或蘊(yùn)含詞中選擇計(jì)數(shù)器的積分最高者,保留該詞和相應(yīng)計(jì)數(shù)器,然后把其他同義詞或蘊(yùn)含詞的計(jì)數(shù)器中的計(jì)分全部加入保留計(jì)數(shù)器中;</p><p>(8)處理近義詞,在出現(xiàn)的多個(gè)近義詞中選擇計(jì)數(shù)器的積分最高者,保留該詞和相應(yīng)計(jì)數(shù)器,然后對(duì)其他近義詞根據(jù)它與保留的近義詞的語義近似程度加入保留的計(jì)數(shù)器。通過上述方法,可以計(jì)算各類別詞在網(wǎng)頁中的權(quán)重,從中提取出HTML文檔的含義。</p><p>這只是基本的的關(guān)鍵詞密度分析算法,而實(shí)際上搜索引擎對(duì)于關(guān)鍵詞的分析,要復(fù)雜的多。而且,思億歐認(rèn)為搜索引擎的算法已經(jīng)比過去智能太多了。搜索引擎算法會(huì)設(shè)置一系列的規(guī)則來識(shí)別網(wǎng)站是否有存在SEO問題,如果我們都按照以往的優(yōu)化教條去執(zhí)行SEO項(xiàng)目的話,基本上是行不通的。</p> 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