Keyword associative document retrieval system
First Claim
1. A document retrieval system comprising:
- a) inputting means for inputting one or a plurality of keywords and weight value for each keyword;
b) a neural network including;
1) an input layer having units corresponding to keywords that have been previously determined in said document retrieval system,2) a hidden layer having the same number of units as said input layer, and3) an output layer having units corresponding to documents that have been previously determined in said document retrieval system;
wherein;
i) each of the units in said input layer is linked to each of the units in said hidden layer by first link factors determined based on relationship values;
ii) each relationship value is defined as a degree of a relationship between two keywords corresponding to linked units in said input and hidden layers;
iii) each of the units in said hidden layer is linked to each of the units in said output layer by second link factors determined based on importance values;
iv) each importance value is defined as a degree of importance of one of said keywords in one of said documents, the keyword and the document corresponding to linked units in said hidden and output layers;
v) the weight value for each of the keywords is supplied from said inputting means to a corresponding one of the units in said input layer; and
vi) an output value for each of the document is output from a corresponding one of the units in said output layer; and
c) means, coupled to said neural network, for generating a relevance value for each of the documents based on the output value from a corresponding one of the units in said output layer of said neural network and for outputting the relevance value as a retrieval result, said relevance value being defined as a degree of relevance in satisfying a user'"'"'s requirement.
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Abstract
A document retrieval system includes an inputting unit for inputting a retrieval condition including one or a plurality of keywords and a weight value for each keyword, an operating unit having first factors corresponding to relationship values, each relationship value being defined as a degree of the relationship between two keywords out of keywords which are predetermined in the document retrieval system and second factors corresponding to importance values, each importance value being defined as a degree of importance of a keyword in each one of a plurality of documents which are predetermined in the document retrieval system, the operation unit generating a relevance value, which represents a degree of relevance in satisfying a user'"'"'s requirement, for each of the documents on the basis of the retrieval condition input from the inputting unit, the first factors and the second factors, and an outputting unit for outputting the relevance value for each of the documents as a retrieval result.
139 Citations
9 Claims
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1. A document retrieval system comprising:
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a) inputting means for inputting one or a plurality of keywords and weight value for each keyword; b) a neural network including; 1) an input layer having units corresponding to keywords that have been previously determined in said document retrieval system, 2) a hidden layer having the same number of units as said input layer, and 3) an output layer having units corresponding to documents that have been previously determined in said document retrieval system; wherein; i) each of the units in said input layer is linked to each of the units in said hidden layer by first link factors determined based on relationship values; ii) each relationship value is defined as a degree of a relationship between two keywords corresponding to linked units in said input and hidden layers; iii) each of the units in said hidden layer is linked to each of the units in said output layer by second link factors determined based on importance values; iv) each importance value is defined as a degree of importance of one of said keywords in one of said documents, the keyword and the document corresponding to linked units in said hidden and output layers; v) the weight value for each of the keywords is supplied from said inputting means to a corresponding one of the units in said input layer; and vi) an output value for each of the document is output from a corresponding one of the units in said output layer; and c) means, coupled to said neural network, for generating a relevance value for each of the documents based on the output value from a corresponding one of the units in said output layer of said neural network and for outputting the relevance value as a retrieval result, said relevance value being defined as a degree of relevance in satisfying a user'"'"'s requirement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification