TENSOR FACTOR DECOMPOSITION PROCESSING APPARATUS, TENSOR FACTOR DECOMPOSITION PROCESSING METHOD AND TENSOR FACTOR DECOMPOSITION PROCESSING PROGRAM

摘要

PROBLEM TO BE SOLVED: To speed up the decomposition of nonnegative tensor factor and improve computation accuracy.SOLUTION: In a tensor factor decomposition processing apparatus 1 for performing factor decomposition processing of a tensor, a tensor construction unit 11 replaces a missing value of tensor constructed with multiple attribute information of a specific event as an element with a negative value. A matrix updating unit 21 updates elements of a factor matrix of the tensors processed in the tensor construction unit 11 by an updating expression based on distance between the tensor and the tensor calculated from the factor matrix. Moreover, if the element of the tensor is a negative value, it is determined that the element is a missing value of the tensor, and the correction value of the element is added to the update.SELECTED DRAWING: Figure 1