137 search results - page 28 / 28 » Text Mining Using the Hierarchical Syntactical Structure of ... |
SIGMOD
2010
ACM
13 years 5 months ago
2010
ACM
Information extraction systems are increasingly being used to mine structured information from unstructured text documents. A commonly used unsupervised technique is to build iter...
BMCBI
2010
13 years 4 months ago
2010
Background: Nonnegative Matrix Factorization (NMF) is an unsupervised learning technique that has been applied successfully in several fields, including signal processing, face re...