公开(公告)号：US20200042872A1

公开(公告)日：2020-02-06

申请号：US16339934

申请日：2017-08-16

Applicant: NEC CORPORATION

Inventor： Yusuke MURAOKA ,  Ryohei FUJIMAKI ,  Zhao SONG

IPC: G06N3/08 ,  G06N7/00 ,  G06Q10/06 ,  G06F17/18

Abstract: A parameter estimation unit 81 estimates parameters of a neural network model that maximize the lower limit of a log marginal likelihood related to observation value data and hidden layer nodes. A variational probability estimation unit 82 estimates parameters of the variational probability of nodes that maximize the lower limit of the log marginal likelihood. A node deletion determination unit 83 determines nodes to be deleted on the basis of the variational probability of which the parameters have been estimated, and deletes nodes determined to correspond to the nodes to be deleted. A convergence determination unit 84 determines the convergence of the neural network model on the basis of the change in the variational probability.