The operating principle of search engine keyword analysis

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we usually find information is obtained through the input data, also is the key we often say, how search engines work for the input keywords, directly through the word to find, or to put these words from related compared from the database, and then according to the word of the ranking, a lot of people working principle is not very clear, because the author in Shanghai Longfeng optimization industry for many years, the segmentation principle of search engines also have a certain understanding, here to write down my understanding with a discussion about

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: the first is the word, this is a search engine to do the work, because we in the search box input is sometimes used phrases, sometimes is a complete sentence, is rarely used phrase to direct search, so the search engine in the official before the input phrase or sentence segmentation, then put these strings into a phrase combination, can no longer be divided, and then query and compare in the pretreatment of the database, to comply with these words the data back to the user, the word segmentation and page segmentation is not much difference in

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search engine turned out to make it easier for us to use the Internet, the information explosion of speech ten years ago now has basically stopped, this was due to the search engine, because more information, has a search engine to help us sort, when we want to just enter the relevant keywords to find the corresponding information, it there will be no kind of explosion of information, to find a message to a person tortured half dead! This search engine contribution and the role of how great is

two: remove stop words, so-called stop words are some meaningless words, such as some ah, oh, words, these words are often in search of the input search box, the search engine in formal and database will put these meaningless stop words cancel then ensure the accuracy of the search

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four: correction of input words, because there are many Chinese characters homophonic, sometimes written phrases also easily appear typos, when search engines often can return the correct results, this is because the search engine in the segmentation process, will give some typos corrected, and the corrected the correct phrase in the above will return the results page figure:

three: how to deal with instructions for the search engine search command, would bring many default phrases into a phrase to search, this maintains high accuracy, such as you in the search box input XX weight XX website, this is actually the command is to lose weight site, but not all XX lose weight XX returns a result, but tend to return to separate these words, such as single weight loss content and so on! Also when the execution of an instruction to coarse various advanced search commands, such as specific identifiers, such as plus and minus signs on