Analysis on the principle of search engine judging whether the website cheats (iii.)

Guangzhou SEO Chen Yong continue to explain how search engine judge site How to judge the principle of the site is cheating, the section on the TrustRank algorithm, this section will explain the Badrank algorithm in detail.

Badrank is rumored to be Google's anti-link cheating algorithm. It is a typical model of distrust propagation, that is, to build a collection of cheating Web pages first, then use the link relationship to communicate this kind of distrust score to other pages.

The basic assumption that Badrank contains is that if a page links its link to a cheat page, the page is likely to be a cheat page: And if a page is directed to a cheat page, it's not a problem, because cheating pages often point their links to some well-known websites, So Badrank's basic idea: find those pages that have links to known cheating pages, and these pages are probably cheating pages.

Badrank first collect a number of already confirmed cheating Web page set (blacklist), the blacklist in the page to give a higher degree of distrust, and not to be trusted by the link between the links to spread the relationship, the calculation process and PR is basically the same, and PR is different, PR is based on the page out of the chain to carry out the weight of the transmission, and Badrank is based on the chain to carry out the weight of the transmission, so will badrank understand as the first link between the Web page inversion, assuming that page A has links to page B, the link back to B point A, Then according to the PR calculation method.

The calculation idea of PR is very representative, and the Parentpank and anti-trust PageRank are consistent with Badrank, which is basically the concrete implementation example of the model of distrust propagation.

Badrank's calculation is clearly complementary to TrustRank, one way is to spread the distrust from the blacklist, and the other is to spread the trust relationship from the whitelist, so the two have a natural complementarity.

Badrank algorithm explained, search engine to judge whether the site cheat principle Analysis (iv) will explain the spamrank algorithm in detail, interested friends can go to my blog to communicate.

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Analysis on the principle of search engine judging whether the website cheats (ii.)