Yonggang Qiu

Effectiveness of Weighted Searching in an Operational IR Environment

Hans-Peter Frei, Yonggang Qiu, H. Frei, 1993, Information Retrieval.

ISIR: An Integrated System for Information Retrieval

Yonggang Qiu, 1993 .

Improving the retrieval effectiveness by a similarity thesaurus

Yonggang Qiu, 1995 .

Automatic query expansion based on a similarity thesaurus

Yonggang Qiu, 1995 .

Concept based query expansion

Hans-Peter Frei, Yonggang Qiu, H. Frei, 1993, SIGIR.

Applying a Similarity Thesaurus to a Large Collection for Information Retrieval

Hans-Peter Frei, Yonggang Qiu, H. Frei, 2007 .

Improving the Retrieval E ectiveness by a Similarity Thesaurus

Hans-Peter Frei, Yonggang Qiu, H. Frei, 1994 .