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Non-Topical Classification of Query Logs Using Background Knowledge
Abstract
Background knowledge has been actively investigated as a possible means to improve performance of machine learning algorithms. Research has shown that background knowledge plays an especially critical role in three atypical text categorization tasks: short-text classification, limited labeled data, and non-topical classification. This chapter explores the use of machine learning for non-hierarchical classification of search queries, and presents an approach to background knowledge discovery by using information retrieval techniques. Two different sets of background knowledge that were obtained from the World Wide Web, one in 2006 and one in 2009, are used with the proposed approach to classify a commercial corpus of web query data by the age of the user. In the process, various classification scenarios are generated and executed, providing insight into choice, significance and range of tuning parameters, and exploring impact of the dynamic web on classification results.
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