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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：百度的爬蟲程序會從互聯(lián)網(wǎng)抓取網(wǎng)頁并將其存入數(shù)據(jù)庫中。 2. 預處理：百度對所有網(wǎng)頁進行預處理，這個過程會去除無用信息、提取關鍵詞、計算每個網(wǎng)頁的PageRank等。 3. 查詢處理：當用戶輸入關鍵詞進行搜索時，百度會將查詢處理成一組詞條，并進行分類別處理，比如確定搜索意圖是找資訊、圖片、視頻等。 4. 檢索匹配：百度搜索引擎會對數(shù)據(jù)庫中的網(wǎng)頁進行匹配，找出所有相關的網(wǎng)頁。 5. 排序：百度會對匹配到的網(wǎng)頁進行排序，根據(jù)網(wǎng)頁相關度、PageRank、時間等因素進行排序，然后將搜索結果呈現(xiàn)給用戶。 6. 呈現(xiàn)結果：在搜索結果頁中，百度會將搜索結果進行呈現(xiàn)，同時提供其它搜索服務，如相關搜索、搜索建議等。總之，百度的搜索引擎工作利用了大量的技術和算法，可以快速地對互聯(lián)網(wǎng)中的信息進行檢索，并為用戶提供高質量、相關的搜索結果。

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

頭條搜索Bytespider基本流程

1、打開頭條搜索頁面https://www.toutiao.com/search/ 2、輸入關鍵詞Bytespider 3、查看搜索結果，點擊相關文章進入查看 4、對文章有點停留時間，提高效果 5、點擊瀏覽其它文章，以此類推，不斷完成搜索

Public @ 2023-03-04 05:00:08

百度搜索引擎工作原理-2-抓取建庫

Spider抓取系統(tǒng)的基本框架互聯(lián)網(wǎng)信息爆發(fā)式增長，如何有效的獲取并利用這些信息是搜索引擎工作中的首要環(huán)節(jié)。數(shù)據(jù)抓取系統(tǒng)作為整個搜索系統(tǒng)中的上游，主要負責互聯(lián)網(wǎng)信息的搜集、保存、更新環(huán)節(jié)，它像蜘蛛一樣在網(wǎng)絡間爬來爬去，因此通常會被叫做“spider”。例如我們常用的幾家通用搜索引擎蜘蛛被稱為：Baiduspdier、Googlebot、Sogou Web Spider等。Spider抓取系統(tǒng)是搜索

Public @ 2022-09-10 16:21:47

百度搜索引擎工作原理-5-結果展現(xiàn)

結構化數(shù)據(jù)——助力站點獲得更多點擊網(wǎng)頁經(jīng)歷了抓取建庫，參與了排序計算，最終展現(xiàn)在搜索引擎用戶面前。目前在百度搜索左側結果展現(xiàn)形式很多，如：鳳巢、品牌專區(qū)、自然結果等，一條自然結果怎樣才能獲得更多的點擊，是站長要考慮的重要一環(huán)。目前自然結果里又分為兩類，見下圖，第一個，即結構化展現(xiàn)，形式比較多樣。目前覆蓋80%的搜索需求，即80%的關鍵詞下會出現(xiàn)這種復雜展現(xiàn)樣式；第二個即一段摘要式展現(xiàn)，最原始的展現(xiàn)

Public @ 2021-09-11 16:21:45

百度搜索引擎工作原理-4-外部投票

外部投票是指其他網(wǎng)站通過鏈接引導用戶來到被投票網(wǎng)站的行為。在搜索引擎的工作原理中，外部投票是非常重要的因素之一，因為搜索引擎將其視為其他網(wǎng)站對被投票網(wǎng)站的認可和推薦。外部投票的數(shù)量和質量對搜索引擎的排名影響非常大。如果一個網(wǎng)站擁有高質量的外部投票，那么搜索引擎就會認為這個網(wǎng)站是一個權威和受歡迎的網(wǎng)站，排名會相應提高。相反，如果一個網(wǎng)站的外部投票數(shù)量和質量很差，搜索引擎就會認為這個網(wǎng)站不值得被推

Public @ 2023-04-21 22:50:31

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[ DB ] CONNECT:[ UseTime:0.026360s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.018770s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 9186 LIMIT 1 [ RunTime:0.017869s ]
[ 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:0.018035s ]
[ 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:0.018257s ]
[ 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:0.018729s ]
[ 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:0.017674s ]
[ 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+2 where id=9186 [ RunTime:0.020419s ]
[ 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:0.026127s ]
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[ 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:0.043841s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, '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）' AND `status` <> -1 LIMIT 1 [ RunTime:0.024856s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, '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）' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.034671s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

0.475174s