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搜索引擎面临哪些问题

网页时效性：互联网上的用户众多，数据信息来源极广，互联网上的网页是呈实时动态变化的，网页的更新、删除等变动极为频繁，有时候会出现新更新的网页在爬虫程序还来不及抓取的时候却已经被删除的情况，这将大大影响搜索结果的准确性。

大数据存储问题：爬虫抓取的数据在经过预处理后数据量依然相当庞大，这给大数据存储技术带来相当大的挑战。当前大部分搜索引擎都是利用结构化的数据库来存储数据，结构化的数据库存储的数据具有高共享、低冗余等特点，然而由于结构化的数据库难以并发查询所以存在查询效率受限的问题。

检索结果可靠性：目前由于数据挖掘技术以及计算机硬件的限制使得数据处理准确度未能达到理想程度，而且由于一些个人或公司利用搜索引擎现有的漏洞通过作弊手段来干扰检索结果导致检索结果的可靠性可能会有损失。

Public @ 2013-08-22 16:22:54

域名被篡改后，百度搜索出的结果描述全是错误的，怎么办？

如果是域名遭到黑客攻击导致的搜索结果摘要标题异常，先解决网站自身问题后，再通过搜索资源平台走死链提交流程，删除相关页面。

Public @ 2015-09-09 16:23:02

网站已经更改，删除过时信息

非常抱歉，但我无法帮助您删除过时信息。AI助手只能提供文本内容的生成和回答问题，无法进行实际的网站更改和删除操作。建议您直接联系网站管理员或相关人员，请求他们进行删除操作。如果您有任何其他问题，我将非常乐意为您解答。

Public @ 2023-06-29 09:00:06

搜索引擎定义

搜索引擎是一种通过互联网索引网站，并搜索相关内容的工具，它可以通过语义分析或关键词检索的方式，从网站所存储的数以亿计的信息中，提供给用户最相关的结果。常见的搜索引擎包括Google、百度、必应等。

Public @ 2023-04-10 13:00:15

搜索引擎有多聪明？

使用黑帽SEO的人，心里或多或少都存在一个假设，那就是搜索引擎没自己聪明。在前几天的搜索引擎怎样判断垃圾留言这个帖子里，就有读者认为我把搜索引擎快说成神了。我想很多人都会抱有这种想法，理由也很简单，搜索结果中含有大把大把的作弊网站，垃圾网站。如果搜索引擎真的那么聪明的话，这些网站怎么还会排名不错呢？对搜索引擎到底有多聪明，今天谈谈自己的想法。首先从常理上来说，主要搜索引擎内部的工程师，大多都是博士

Public @ 2009-07-02 16:22:40

更多您感兴趣的搜索

基本文件流程错误 SQL 调试

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[ DB ] CONNECT:[ UseTime:0.024524s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.017930s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 5434 LIMIT 1 [ RunTime:0.016467s ]
[ 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:0.016609s ]
[ 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:0.017057s ]
[ 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:0.017805s ]
[ 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` = 5434 LIMIT 1 [ RunTime:0.016314s ]
[ 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=5434 [ RunTime:0.017163s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海了解搜索引擎' AND `status` <> -1 LIMIT 1 [ RunTime:0.022407s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9541, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海了解搜索引擎' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.034688s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9541, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海搜索引擎' AND `status` <> -1 LIMIT 1 [ RunTime:0.023647s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9541, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海搜索引擎' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.034386s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9541, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

0.438881s

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