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LambdaMerge: merging the results of query reformulations (2011, result): “Note that this type of two-stage score normalization is analogous to some federated search blending techniques where the rescaled server-specific document scores are normalized according to server quality scores [5].”
Building efficient and effective metasearch engines (2002, methodology): “Recently, it was shown in Xu and Callan [1998] that if phrase information is collected and stored in each database representative and queries are expanded based on a technique called local context analysis [Xu and Croft 1996], then the CORI Net approach can select useful databases more accurately.”
Query-based sampling of text databases (2001, methodology): “Although the theoretical justi cation for this heuristic normalization is weak, it has been e ective in practice [1; 2; 4; 22] and has been used in INQUERY since 1995.”