Abstract
As they said:
“Recommendation systems are important business applications with significant economic impact. In recent years, a large number of algorithms have been proposed for recommendation systems.”
and
“Recommendation systems are emerging as an important business application. Amazon.com, for example, provides personalized product
recommendations based on previous purchases. Other examples include music recommendations in pandora.com, movie recommendations in netflix.com, and friend recommendations in Facebook.com.”
How it works?
See this：
And more details, see the attachment below: