| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To allow a model parameter to be estimated more accurately than conventional devices and methods. <P>SOLUTION: A device receives one or more lists i which comprise a plurality of symbol sequences f<SB>i, j</SB>which have importance degrees e<SB>i, j</SB>assigned thereto and are expressed by identity vectors, and receives correct answer symbol sequences f<SB>i, O</SB>of respective list i, which have importance degrees e<SB>i, O</SB>assigned thereto and are expressed by identity vectors, and estimates a model parameter w and includes an importance degree conversion part and a model parameter estimation part. The importance degree conversion part converts, per list, importance degrees e<SB>i, j</SB>so that a value of the degree of importance of a prescribed symbol sequence is relatively larger than values of degrees of importance of symbol sequences other than the prescribed sequence. The model parameter estimation part estimates the model parameter w from the symbol sequences f<SB>i, j</SB>, correct answer symbol sequences f<SB>i, O</SB>, and degrees of importance after the conversion. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
