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本文来源:曼朗 发布时间:2015-06-03 分享:
网站推广介绍搜索引擎是internet上的一个网站,其主要任务是在internet上主动搜索一定范围内的服务器信息,并将其自动索引,其索引内容存储于可供查询的大型数据库中,用户可以依照这个目录逐层深入,直至找到所需信息;用户也可以它们的各种程序中输入关键词查询,搜索引擎就会在自己的数据库中告诉用户包含该关键词的所有网址,并提供通向该网站的链接。
网络推广介绍随着网络技术的飞速发展,internet数据库积累的信息和主题越来越多,怎样快速、高效、经济地查询某个主题的所有信息就成了十分热门的话题,搜索引擎正成为IT行业兵家必争之地。
网站优化推广介绍搜索引擎的工作原理可以阐述为:自动收集网页的spider系统程序通过扫描一定范围内每一篇文章或网页中的每一个词,建立以词为单位的倒排文件,检索程序根据检索词在每篇文章或网页中出现的频率,对包含这些检索词的文章或网页进行排序,更后输出检索结果。换句话说,就是根据用户的查询请求,将含有特定单词的文章或网页列出来。
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