Following the rapid development and wide application of
the Internet, Web has become an exchange, sharing of
information and effective tool for collaborative work.
People's attention and frequent use of the Web promote the
development of this technology, but also make the Web
information resources on the rapid growth. However, there
are flood of information resources distribute on Web, to
Convenient to bring the people at the same time, also makes
the network very difficult to in-depth application. On the one
hand a person is only concerned about a small information
of Web, and user is not interested in the rest of the