Lecture7:Social Network Analysis

Compared with lecture 6, this lecture has more explanation on prestige and ranking algorithms.


Pagerank patent belongs to Larry Page who is one of the founders of Google:

The page rank of our own websites calculated by a third part tool is as follow:

It is almost zero now. Because our website was built just several days ago, and still under construction. And we can see another example of Facebook:

We can see that the result is much higher. With this tool we can see the popularity of a websites to some extent.And of course Facebook is much more popular than our own website now. If we want to promote our website, there are still a lot of thing to do.

Page rank calculated by Google is not real time, but updated 4 times a year. It is said that this decision is a balance between technology and commercial reason.   

In fact, there are many different algorithms to calculate page rank. And there are different factors have been taken into consideration. Several factors affecting the prestige:

1.  Number of reverse connections and rank of reverse connections

2.  High quality content links connect to your website

3.  Add the search engine categories

4.  To join open source directory

5.  Appear in high traffic, high visibility and frequently updated website

6.  For google, PDF format document is emphasized and google toolbar installed have benefits

7.  Domain name and the title have keywords and meta tags

8.  Number of links exported

Reference:

http://www.prchecker.info/check_page_rank.php
http://baike.baidu.com/view/1518.htm