A computerized method for automatic document classification based on a combined use of the projection and the distance of the differential document vectors to the differential latent semantics index (DLSI) spaces. The method includes the setting up of a DLSI space-based classifier to be stored in computer...http://www.google.com.hk/patents/US7024400?utm_source=gb-gplus-share專利 US7024400 - Differential LSI space-based probabilistic document classifier
