Uncover the mystery, search engine principle [turn]

xiaoxiao2021-03-05  51

On the Internet, especially on the Web (World Wide Web World Wide Web), it will not come to the Internet. Neville friends, do you understand search engines? How do they work? Which search engines do you use? Today, I will talk to you the topic of search engines. First, the search engine classification is available to website web information, can establish a database and provide a query system, we can call it search engine. According to the different working principles, they can be divided into two basic categories: fullText Search Engine and Categorical Directory Directory. The database of the full-text search engine is based on a "Network Robot" or "Crawlers" software, automatically obtains a large number of web information content through various links on the network, and analyzes according to the specified rules Forming. Google, Baidu is a typical full-text search engine system. The classification directory is to collect the website information through artificial way to form a database, such as Yahoo China and the domestic Sohu, Sina, Netease Categority. In addition, some navigation sites on the Internet can also belong to the original classification directory, such as the "URL Home" (http://www.hao123.com/). The full-text search engine and the category directory have long short. Because of its software, the full-text search engine is very large, but its query results are often insufficient enough; the classification directory relies on manual collection and organizing websites to provide more accurate query results, but the content collected is very limited . In order to take long supply, many search engines now provide these two types of queries, generally refer to the query of the full-text search engine, called search "all websites" or "All Website", such as Google's full-text search (http://www.google .com / INTL / EN / EN /); refer to the search for the classified directory called Search "Classification Directory" or search "Classified Website", such as Sina Search (http://dir.sina.com.cn/) and Yahoo China Search (http://cn.search.yahoo.com/dirsrch/). In the Internet, these two types of search engines are integrated, and other search services are produced. Here, we are right and also call them as search engines, mainly these two categories: Meta Search Engine. Such search engines generally do not have their own network robots and databases, and their search results are displayed by calling, controlling and optimizing search results of other multiple independent search engines and is set in the same interface in a unified format. Although the Yuan Search Engine does not have a "network robot" or "network spider", there is no independent index database, but in terms of search request, retrieval interface proxy and retrieval results display, all have its own research and development of specialized element search technology. For example, "Http://www.hsfz.net/fish/), which calls and integrates data from Google, Yahoo, AllTheWeb, Baidu and OpenFind. ⒉ Integrate Search Engine (All-in-One Search Page).

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