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The Best Answers？ Think Twice： Identifying Commercial Campagins in the CQA Forums

Journal of Computer Science & Technology 2015年第4期30卷 810-828页

作者：陈诚吴逵 Venkatesh Srinivasan Kesav Bharadwaj R Department of Computer Science University of Victoria Victoria V8P 5C2 Canada

In an emerging trend, more and more Internet users search for information from Community Question and Answer （CQA） websites, as interactive communication in such websites provides users with a rare feeling of trust. More often than not, end users look for instant help when they browse the CQA websites for the best answers. Hence, it is imperative that they should be warned of any potential commercial campaigns hidden behind the answers. Existing research focuses more on the quality of answers and does not meet the above need. Textual similarities between questions and answers are widely used in previous research. However, this feature will no longer be effective when facing commercial paid posters. More context information, such as writing templates and a user’s reputation track, needs to be combined together to form a new model to detect the potential campaign answers. In this paper, we develop a system that automatically analyzes the hidden patterns of commercial spam and raises alarms instantaneously to end users whenever a potential commercial campaign is detected. Our detection method integrates semantic analysis and posters’ track records and utilizes the special features of CQA websites largely different from those in other types of forums such as microblogs or news reports. Our system is adaptive and accommodates new evidence uncovered by the detection algorithms over time. Validated with real-world trace data from a popular Chinese CQA website over a period of three months, our system shows great potential towards adaptive detection of CQA spams.

关键词： CQA forum anomaly detection paid poster online detection system

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