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百度搜索引擎工作原理

百度搜索引擎工作原理大致如下： 1. 爬蟲抓取網(wǎng)頁：百度的爬蟲程序會(huì)從互聯(lián)網(wǎng)抓取網(wǎng)頁并將其存入數(shù)據(jù)庫中。 2. 預(yù)處理：百度對(duì)所有網(wǎng)頁進(jìn)行預(yù)處理，這個(gè)過程會(huì)去除無用信息、提取關(guān)鍵詞、計(jì)算每個(gè)網(wǎng)頁的PageRank等。 3. 查詢處理：當(dāng)用戶輸入關(guān)鍵詞進(jìn)行搜索時(shí)，百度會(huì)將查詢處理成一組詞條，并進(jìn)行分類別處理，比如確定搜索意圖是找資訊、圖片、視頻等。 4. 檢索匹配：百度搜索引擎會(huì)對(duì)數(shù)據(jù)庫中的網(wǎng)頁進(jìn)行匹配，找出所有相關(guān)的網(wǎng)頁。 5. 排序：百度會(huì)對(duì)匹配到的網(wǎng)頁進(jìn)行排序，根據(jù)網(wǎng)頁相關(guān)度、PageRank、時(shí)間等因素進(jìn)行排序，然后將搜索結(jié)果呈現(xiàn)給用戶。 6. 呈現(xiàn)結(jié)果：在搜索結(jié)果頁中，百度會(huì)將搜索結(jié)果進(jìn)行呈現(xiàn)，同時(shí)提供其它搜索服務(wù)，如相關(guān)搜索、搜索建議等。總之，百度的搜索引擎工作利用了大量的技術(shù)和算法，可以快速地對(duì)互聯(lián)網(wǎng)中的信息進(jìn)行檢索，并為用戶提供高質(zhì)量、相關(guān)的搜索結(jié)果。

Public @ 2023-06-20 19:50:19

搜索引擎工作的基礎(chǔ)流程與原理

搜索引擎最重要的是什么？有人會(huì)說是查詢結(jié)果的準(zhǔn)確性，有人會(huì)說是查詢結(jié)果的豐富性，但其實(shí)這些都不是搜索引擎最最致命的地方。對(duì)于搜索引擎來說，最最致命的是查詢時(shí)間。試想一下，如果你在百度界面上查詢一個(gè)關(guān)鍵詞，結(jié)果需要5分鐘才能將你的查詢結(jié)果反饋給你，那結(jié)果必然是你很快的舍棄掉百度。搜索引擎為了滿足對(duì)速度苛刻的要求（現(xiàn)在商業(yè)的搜索引擎的查詢時(shí)間單位都是微秒數(shù)量級(jí)的），所以采用緩存支持查詢需求的方式，也就

Public @ 2017-02-18 16:21:54

搜索引擎收錄網(wǎng)頁的四個(gè)階段

作為SEO從業(yè)者，不僅要被搜索引擎抓取，還要被收錄，最重要的是在收錄后有良好的排名，本文將簡單分析下搜索引擎收錄網(wǎng)頁的四個(gè)階段。每個(gè)網(wǎng)站、每個(gè)網(wǎng)頁的排名都是不一樣的，看看你的網(wǎng)站處于哪個(gè)階段呢?搜索引擎收錄網(wǎng)頁的四個(gè)階段 PageRank 搜索引擎建站教程第1張網(wǎng)頁收錄第一階段：大小通吃搜索引擎的網(wǎng)頁抓取都是采取「大小通吃」的策略，也就是把網(wǎng)頁中能發(fā)現(xiàn)的鏈接逐一加入到待抓取URL中，機(jī)械性的將

Public @ 2012-08-25 16:22:23

百度搜索引擎工作原理-4-外部投票

外鏈的作用（2014版）曾經(jīng)，“內(nèi)容為王超鏈為皇”的說法流行了很多年，通過超鏈計(jì)算得分來體現(xiàn)網(wǎng)頁的相關(guān)性和重要性，的確曾經(jīng)是搜索引擎用來評(píng)估網(wǎng)頁的重要參考因素之一，會(huì)直接參與搜索結(jié)果排序計(jì)算。但隨著該技術(shù)被越來越多的SEO人員了解，超鏈已經(jīng)逐漸失去作為投票的重要意義，無論是谷歌還是百度，對(duì)超鏈數(shù)據(jù)的依賴程度都越來越低。那么，在現(xiàn)在，超鏈在發(fā)揮著怎樣的作用？1，吸引蜘蛛抓?。弘m然百度在挖掘新好站點(diǎn)

Public @ 2021-07-26 16:21:46

百度搜索引擎工作原理-1-抓取建庫

百度搜索引擎的工作原理首先是抓取建庫，這是一個(gè)自動(dòng)化的過程，百度通過多種方式來收集Web頁面。百度擁有多臺(tái)服務(wù)器，它們負(fù)責(zé)索引世界上大量的網(wǎng)站，以及持續(xù)的更新內(nèi)容。百度抓取網(wǎng)頁的方式有兩種，一種是爬蟲，它們自動(dòng)訪問web頁面，抓取那些有可能帶有搜索關(guān)鍵字的頁面；另一種是人工抓取，百度人工審查網(wǎng)頁，將其記錄到百度索引數(shù)據(jù)庫中。抓取到的網(wǎng)頁都會(huì)放入百度索引庫中，該庫中包含了網(wǎng)頁的具體內(nèi)容、

Public @ 2023-03-02 00:00:21

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[ DB ] CONNECT:[ UseTime:0.021958s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.015786s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 9186 LIMIT 1 [ RunTime:0.014917s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.014918s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by times desc limit 100 [ RunTime:0.015340s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by rand() limit 30 [ RunTime:0.015514s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 9186 LIMIT 1 [ RunTime:0.014879s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+1 where id=9186 [ RunTime:0.016288s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海搜索引擎工作原理' AND `status` <> -1 LIMIT 1 [ RunTime:0.021673s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海搜索引擎工作原理' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.038844s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海百度搜索引擎工作原理（百度搜索資源平臺(tái)）' AND `status` <> -1 LIMIT 1 [ RunTime:0.022256s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海百度搜索引擎工作原理（百度搜索資源平臺(tái)）' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.032994s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

0.418737s