Decision-tree-based symbolic rule induction system for text categorization
申请公布号:US6519580(B1)
申请号:US20000589397
申请日期:2000.06.08
申请公布日期:2003.02.11
发明人:JOHNSON DAVID E.;OLES FRANK J.;ZHANG TONG
分类号:G06F17/30;G06K9/62;G06N5/02;(IPC1-7):G06F17/00;G06F15/18
主分类号:G06F17/30
摘要:A method to automatically categorize messages or documents containing text. The method of solution fits in the general framework of supervised learning, in which a rule or rules for categorizing data is automatically constructed by a computer on the basis of training data that has beforehand been categorized, i.e., each training data item has been labeled with the categories to which it belongs. More specifically, the method for rule induction involves the novel combination of (1) inducing from the training data a decision tree for each category, (2) automated construction from each decision tree of a simplified symbolic rule set that is logically equivalent overall to the decision tree, and which is to be used for categorization instead of the decision tree, and (3) determination of a confidence level for each rule. The method covers both decision-tree-based symbolic rule induction and the use for the purpose of document categorization of rules in the logical format of those generated by the rule induction procedure described herein.
VERFAHREN UND VORRICHTUNG ZUM GRUPPIEREN VON GEGENSTAENDEN UND ANWENDUNG DES VERFAHRENS
ELEKTRO-KONTAKTAUFNAHMETEIL FUER EINEN MESSERKONTAKT
VERFAHREN UND ANLAGE ZUR UMWANDLUNG VON ABFALLSTOFFEN IN BESTAENDIGE ENDPRODUKTE
FOERDERVORRICHTUNG FUER ZUSCHNITTE
A HEAVY LOAD PNEUMATIC RADIAL TYRE WITH MODIFIED TREAD PATTERN
ELECTRODEPOSITION OF BRIGHT COPPER
STOPPING TRUCK AT PRESELECTED POINT
DEVICE FOR RELEASABLY SECURING ONE UNIT AGAINST A SECOND UNIT