| 摘要 |
A method and apparatus are provided for inferring topics for web pages and web ads for contextual advertising. In one example, the method includes receiving clicked ads from an ads log database, extracting ad terms from the clicked ads, calculating hidden classes for the ad terms based on an analysis of the ad terms, calculating a probability of each clicked ad appearing in each of the hidden classes, and assigning a topic to each clicked ad based on the probability of each clicked ad appearing in each of the hidden classes.
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