Invention Grant
US09249287B2 Document evaluation apparatus, document evaluation method, and computer-readable recording medium using missing patterns 有权
文献评估装置,文件评价方法以及使用缺失图案的计算机可读记录介质

Document evaluation apparatus, document evaluation method, and computer-readable recording medium using missing patterns
Abstract:
In order to accurately learn a function for evaluating documents, even in the case where sample documents having missing feature values are included as training data, a document evaluation apparatus is provided with a data classification unit (3) that classifies a set of sample documents based on missing patterns of a first feature vector, a first learning unit (4) that uses feature values that are not missing in the first feature vector and evaluation values to learn a first function for calculating a first score which is a weighted evaluation value for each classification, a feature vector generation unit (5) that computes a feature value corresponding to each classification using the first score, and generates a second feature vector having the computed feature values, and a second learning unit (6) that uses the second feature vector and the evaluation values to learn a second function for calculating a second score for evaluating documents targeted for evaluation.
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