A system examines a user profile based on a knowledge associated with a user. The system examines a content context profile associated with a type of application and an application environment. The system examines an advertisement profile associated with a plurality of advertisements that include a plurality...http://www.google.com.hk/patents/US20060294084?utm_source=gb-gplus-share專利 US20060294084 - Methods and apparatus for a statistical system for targeting advertisements
