Webmaster Analysis of search engine sequencing process

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Today's search engines do not just take some sort of algorithm, they tend to combine multiple sorting algorithms to achieve a better sorting effect. Therefore, the search engine sequencing process involves every aspect of the search engine. In general, I found in the optimization of Chang-zhu-tan fresh network, search engine ranking algorithm mainly involves the following links: Web Capture link, off-line analysis link and user query link.

First, the Web crawl link. Search engine general use Crawler, through the link of the webpage related to the Web crawl page. Web Crawl is the process of data accumulation of search engines. In the Web crawl link, the crawler needs to record the link relationship of the webpage, the anchor text of the webpage, the webpage updates the time page and so on webpage information. Then the Web page for the resolution, de-noising, get the theme content of the Web page and the link between the page. Then through the Word segmentation tool on the page content, statistics page TF,TP (Word position information) and other information. Finally, the crawler saves the information to a large index library and provides the search engine with the retrieved data. (The above information off-line calculation)

Second, off-line analysis link. Web Capture is time-consuming, and it is not possible to crawl all the pages on the Web at once. In general, search engines are a time to crawl the web once, the new crawled page to update to the index. After crawling down the Web page, we need to count the IDF values of the pages in the index database, and then calculate the PageRank value of the page according to the link relationship of the Web page. (The above information off-line calculation)

Third, the user inquires the link. User queries, users submit query information to the search engine. Search engine to the query information preprocessing, including participle, pause word filter, etc., to the index library to submit the query after the resolution. According to the above TF,TP,DF as well as the page PageRank value, the Fusion user feedback information, the webpage update time and so on factor, obtains the final page score. Finally, the resulting page will be displayed to the user according to the final score, for the user to browse. (Online calculation)

In the above three links, the first two links relative to the calculation is very large, and very time-consuming, so it is before the user to query on the first. These two steps provide a large amount of data preparation for the third step. The third step in the user query online calculation, so the speed requirements are relatively high. Search engine in the sorting algorithm to achieve speed and quality of the balance therefore, the search engine sequencing process involves every aspect of the search engine, the specific process as shown:

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