Search engine Background keyword query principle analysis

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Search engine is an information platform, it does not provide information itself, Li recently launched the Theory of box computing and Baidu open platform are better to explain a bit. As a search engine optimizer, we must understand the search engine background keyword query principle.

When we submit a keyword to the search engine box, the Chinese search engine must get the information that the user needs through the word segmentation technology and feedback it to the user. In this article, John leads you to understand the keyword query process and principles. In the query, we usually divided into four kinds of situations:

A, search engine backstage according to the separator or Word segmentation dictionary to carry on the close segmentation

Users in search engine typing keywords and press ENTER, search engine background first to determine whether there are spaces, punctuation, etc., if there is, the search engine will be this keyword again decomposed into a few small keyword analysis, if there is no separator according to the background of Word segmentation dictionary segmentation.

Let me give an example, for example, we search in Baidu "Ningbo SEO", click on the first site snapshot, Baidu will be in the snapshot of two words with different colors to mark out, such as "Ningbo" is yellow, "SEO" is light blue, the following figure:

Ningbo SEO

This example tells us, we search "Ningbo seo" time, Baidu decomposed it into a "Ningbo" and "SEO" to get inquiries. If the middle is "," the result of the query is actually the same. This is why when writing more than two keywords, we recommend that you use a half-angle English comma to divide, so that you can avoid the search for repeated resolution. Chinese word segmentation technology relative to other languages to be more difficult, because it is not a word without space, not like English every word has a space, this gives search engines bring very big difficulties, completely without our imagination simple. At present in Chinese word segmentation technology, Baidu is better than Google.

Second, when there are repeated words search engine is how to deal with

For example, you search "Ningbo seo seo" and "ningbo seo" results are the same. This shows that in the case of Baidu repeated words, will be directly discarded, keep one, so the results are the same. But Google is different, search the two phrases ranking is different, indicating that Google in this respect to strengthen the operational parameters.

If you are in Baidu query "seo ningbo seo" and "Ningbo seo", the results are the same, this also shows that Baidu directly ignore the relationship. But in Google's search results are different, indicating that Google introduced the parameters of the relationship.

How to deal with the search engine when searching English words

When the user enters the English word, this English word will be used as a word to split, and then in the English word as the boundary, and then the subordinate keyword before and after. For example, when you search for "Apple Mac," the search engine will cut them into "apple" "Mac" "System" three words, and will be the Mac as an important word to retain, regardless of the word in this phrase syntax.

Four, search engine will query extension processing will improve the recall rate of information retrieval

Search engine will be based on user search keywords to determine the unspoken words and consent words. For example, you search for "Dad" and "Mom", "WEB" and "Internet", "Harmony" and "society", search engines will be treated as synonyms. In addition, search engines in the search, but also according to the topic to classify, such as your search "Ningbo website construction", the website design will also show Red, as shown:

Ningbo website Construction

Overall, Baidu in Chinese word segmentation technology than Google more than a chip.