Yu Nishiyama

Yu Nishiyama (Ph.D.)

Affiliation :Dept. of Computational Intelligence and Systems Science, Tokyo Institute of Technology, Japan
Lab : Sumio Watanabe Group in Precision and Intelligence Lab., Tokyo Institute of Technology.
Supervisor : Prof. Sumio Watanabe.
Mailing Address : Mailbox R2-5, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
Email : nishiyudesu(at)cs.pi.titech.ac.jp
Phone : +81-45-924-5018

Current Research Interests : Statistical Learning Theory, Machine Learning, Statistical Mechanical Informatics, Brain Information Processing, Statistical Physics.
Research Topics :

Probabilistic Inference, Graphical Models, (Loopy) Belief Propagation, Concave-Convex Procedure(CCCP), Bethe/Kikuchi Approximation.

Bayes Learning, Singular Probabilistic Models, Variational Bayes (Mean-Field Approximation).

MPM estimation, Code Division Multiple Access (CDMA).

TRW Free Energy, MAP problem

Sinkhorn Algorithm

Curriculum Vitae Publication List

NEWS

2010 4/1, After April 2010, I change my affiliation to Lab. for Integrated Theoretical Neuroscience, RIKEN Brain Science Institute.

2009 fall and winter, I visited Prof Yuille group, Center for Image and Vision Science(CIVS),
Department of Statistics, at University of California, Los Angeles(UCLA).
It was a nice stay!

Activities

2009 3/12 I received a Young Researcher Award from IEEE Computational Intelligence Society Japan Chapter.

2008 12/20
Y. Nishiyama, Y. Tonosaki, S. Watanabe, "A CDMA Multiuser Demodulation Algorithm Based on NCCCP"
IEICE Technical Report, vol.108, No.372, pp.49-54, December, 2008. (Japanese)

2008 12/15$B!A(B12/17
Y. Nishiyama "An Extension of the CCCP Algorithm for the Kikuchi Free Energy",
DEX-SMI2008, December, 2008. (Japanese)

2008 10/29$B!A(B10/31
Y. Nishiyama, Y. Tonosaki, S. Watanabe, "An Extension of the CCCP Algorithm for the Kikuchi Free Energy and A CDMA Multiuser Demodulation Algorithm",
11th Workshop on Information-Based Induction Sciences (IBIS2008), A19, October, 2008. (Japanese)

2008 9/3$B!A(B6
"Generalization of Concave and Convex Decomposition in Kikuchi Free Energy",
Yu Nishiyama, Sumio Watanabe, Proc. of ICANN2008, LNCS 5163, pp.51-60, Prague, Czech Republic, September, 2008. paper(pdf), slide(pdf)

2008 6/22$B!A(B26
"On the Minima of Bethe Free Energy in Gaussian Distributions",
Yu Nishiyama, Sumio Watanabe, Proc. of ICAISC2008, LNAI 5097, pp.1075-1086, Zakopane, Poland, June, 2008. paper(pdf), poster(pdf)

2008 3/22$B!A(B26
Y. Nishiyama, S. Watanabe, "An Extension of the CCCP Algorithm for the Kikuchi Free Energy",
63rd Annual Meeting, Physical Society of Japan, 25pPSB-4, March, 2008. (Japanese)

2008 3/12$B!A(B14
Y. Nishiyama, S. Watanabe, "An Extension of CCCP Algorithm for Bethe Free Energy",
IEICE Technical Report, vol.107, No.542, pp.85-90, March, 2008. (Japanese)

2008 1/15$B!A(B16
Y. Nishiyama, S. Watanabe, "Analytical and Numerical Solutions of Bethe Approximation in Normal Distributions",
IEICE Technical Report, vol.107, No.413, pp.1-6, January, 2008. (Japanese)

2007 11/5$B!A(B7
Y. Nishiyama, S. Watanabe, "Theoretical Analysis of Bethe Approximation in Gaussian Distribution",
Proceedings of 10th Workshop on Information-Based Induction Sciences (IBIS2007), pp.177-183, November, 2007. (Japanese)

2007 9/9$B!A(B13
Y. Nishiyama, S. Watanabe, "Theoretical Analysis of Accuracy of Gaussian Belief Propagation",
Proc. of ICANN2007, Part I, LNCS 4668, pp.29-38, Porto, Sep., 2007. paper(pdf) slide(ppt)

2007 5/21
Y. Nishiyama, S. Watanabe, "Theoretical Analysis of Accuracy of Belief Propagation in Gaussian Models",
IEICE Technical Report, vol.107, No.50, pp.23-28, May, 2007. paper(pdf)

2007 5/21
Y. Nishiyama, S. Watanabe, "Stochastic Complexity of Complete Bipartite Graph-Type Boltzmann Machines in Mean Field Approximation",
Electronics and Communications in Japan, John Wiley & Sons, vol.90, No.9, pp.1-9, 2007.

2006 10/3$B!A(B6
Y. Nishiyama, S. Watanabe, "Asymptotic Behavior of Stochastic Complexity of Complete Bipartite Graph-type Boltzmann Machines",
Proc. of ICONIP2006, Part I, LNCS 4232, pp.417-426, Hong Kong, Oct., 2006. paper(pdf) slide(ppt)

2006 7/14
Y. Nishiyama, S. Watanabe, "Asymptotic Behavior of Free Energy of General Boltzmann Machines in Mean Field Approximation",
IEICE Technical Report, vol.106, No.163, pp.1-6, July, 2006. (Japanese)