Improving Probabilistic Latent Semantic Analysis with Principal Component Analysis Ayman Farahat author Francine Chen author 2006-04 text 11th Conference of the European Chapter of the Association for Computational Linguistics Diana McCarthy editor Shuly Wintner editor Association for Computational Linguistics Trento, Italy conference publication farahat-chen-2006-improving https://aclanthology.org/E06-1014/ 2006-04 105 112