인터넷기반 정보 검색을 위한 LSI 활용 - QR 분해를 이용한 LSI 향상

LSI-Updating Application for Internet-based Information Retrieval - LSI Improvement Using QR Decomposition

This paper took advantage of SVD (Singular value Decomposition) techniques of LSI(Latent Semantic Indexing) to grasp easily terminology distribution. Existent LSI did to static database, propose that apply to dynamic database in this paper. But, if dynamic applies LSI to database, updating problem happens. Existent updating way is Recomputing method, Folding-in method, SVD-updating method. Proposed QR decomposition method to show performance improvement than existent three methods in this paper.