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Context-Aware Query Suggestion by Mining Click-Through and Session Data Huanhuan Cao Daxin Jiang Jian Pei Qi He Zhen Liao Enhong Chen Hang Li Outline • Framework • Mining Query Concepts – Click-Trough Bipartite – Clustering Method • Query Suggestions – Query Sessions – Concept Sequence Suffix Tree – Online Query Suggestion Framework Mining Query Concepts • Click-Trough Bipartite • Clustering Method Click-Trough Bipartite • The feature vector of a query: • The Euclidean distance between two queries: The data structure for clustering Clustering Method • The normalized centroid of a cluster: • Distance between a query and a cluster: • The compactness of a cluster: Conducting Query Suggestion • Query Session • Concept Sequence Suffix Tree • Online Query Suggestion Query Session Concept Sequence Suffix Tree Online Query Suggestion • Question