公开(公告)号：JP2001312505A

公开(公告)日：2001-11-09

申请号：JP2000133323

申请日：2000-05-02

Applicant: IBM

Inventor： KOBAYASHI MEI ,  ROIKKU MARASHII ,  ROMANOS PIPERAKISU

IPC: G06F17/30

Abstract: PROBLEM TO BE SOLVED: To provide a method, a system and a recording medium that detect and trace new items and/or new classes of documents in a database afterward. SOLUTION: The method for detecting and tracing the new items and/or the new classes of documents in a database, to which the new items and/or the new classes are added and which contains the attribute data relating to a time parameter, gives a document vector using the attribute data including the time parameter, which are included in the document, detects and traces concurrently the new items and/or the new classes by using the vector.

公开(公告)号：JP2002351711A

公开(公告)日：2002-12-06

申请号：JP2001157614

申请日：2001-05-25

Applicant: IBM

Inventor： KOBAYASHI MEI ,  ROMANOS PIPERAKISU

IPC: G06F17/16 ,  G06F12/00 ,  G06F15/18 ,  G06F17/18 ,  G06F17/30 ,  G06N3/02

Abstract: PROBLEM TO BE SOLVED: To retrieve and/or rank a document in a database. SOLUTION: This retrieving/ranking forms a document matrix including numerical data to be obtained from attribute data, forms covariance matrix from a document matrix, calculates the fixed value of the covariance matrix by using a neutral network algorithm, calculates the inner product of a characteristics vector to judge the convergence of a sum S, decides the final set of the characteristics vector, applies the set of the obtained characteristics vector to the resolution of a characteristics value, lowers the dimension of a matrix V by using a prescribed number of characteristics vector included in the matrix V and including the characteristics vector corresponding to the largest characteristics value, and lowers the dimension of the document matrix by using the matrix V the dimension of which is lowered.