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2009 Fiscal Year Annual Research Report

ニューロンのスパイクの揺らぎによる神経回路網の推定

Research Project

Project/Area Number 18079003
Research InstitutionThe University of Tokyo

Principal Investigator

岡田 真人  The University of Tokyo, 大学院・新領域創成科学研究科, 教授 (90233345)

Keywords多体問題 / 統計力学 / 神経科学 / BMI / データマイニング
Research Abstract

これまでに提案した次元圧縮とクラスタリングを同時最適化する枠組みに関して,新しい手法を提案した.これまでの手法で混合ガウス分布モデルを用いたモデルでは,二段階の次元圧縮を行っていた.最初の段階では,主成分分析(PCA)を行い,寄与の大きな空間成分のみを残して,残りの補空間を無視した.次の段階で,白色化という操作で,残した空間の寄与を同じにした後に,クラスタリングが最もよく実現される低次元空間を求めた.
今回は,これら二つの手続きを統一的にとり取り扱う手法を提案した.この手法では,ARD(Automatic Relevance Detemination)と呼ばれる次元選択の方法と,クラスタリングに基づく次元圧縮を組み合わせた.従来ARDとPCAを組み合わせた手法は提案されてきたが,PCAでは,多電極測定により生じるノイズに弱いと考えられていた.我々のARDとクラスタリングによる次元圧縮を組み合わせた手法は,この弱点を克服すると予想し,この手法を,これまで我々の従来手法で解析した側頭葉のデータとジュウシマツの歌に適用し,得られた結果から提案手法の特性を評価した.このようにして得られた提案手法の知見をもとに,この手法を脳神経系のデータだけでなく生命系全般に応用した.このプロジェクトのために研究支援者一人を雇用した.
これまで本研究で取り扱ってきたベイズ推定では局所解の問題があった.近年ベイズ推定で用いられている事後確率を近似することにより,局所解のない問題に変換する事が提案されつつある.この枠組みを,これまで本研究で取り扱ってきた問題に適用することより,より高速に解を求めることができる手法を提案した.このプロジェクトのために研究支援者一人を雇用した.
本年度は最終年度であるので,これまでの成果をまとめると共に,得られた成果の今後の発展につながるプロジェクトを適宜提案して遂行した.

  • Research Products

    (23 results)

All 2010 2009

All Journal Article (23 results) (of which Peer Reviewed: 23 results)

  • [Journal Article] Flexible traffic control of the synfire-mode transmission by inhibitory modulation : Nonlinear noise reduction2010

    • Author(s)
      Takashi Shinozaki
    • Journal Title

      Physical Review E 81

      Pages: 011913-1-011913-7

    • Peer Reviewed
  • [Journal Article] Statistical mechanics of an error correcting code using monotonic and nonmonotonic treelike multilayer perceptrons2010

    • Author(s)
      Florent Cousseau
    • Journal Title

      Physical Review E 81

      Pages: 021104-1-021104-10

    • Peer Reviewed
  • [Journal Article] Switch of encoding characteristics in single neurons by subthreshold and suprathreshold stimuli2010

    • Author(s)
      Toshiaki Omori
    • Journal Title

      Physical Review E 81

      Pages: 021901-1-021901-9

    • Peer Reviewed
  • [Journal Article] Mismatched decoding in the brain2010

    • Author(s)
      Masafumi Oizumi
    • Journal Title

      Journal of Neuroscience 30

      Pages: 4815-4826

    • Peer Reviewed
  • [Journal Article] Discriminating natural image statistics from neuronal population codes2010

    • Author(s)
      Satohiro Tajima
    • Journal Title

      PLoS ONE 5

      Pages: e9704-1-10

    • Peer Reviewed
  • [Journal Article] Statistical mechanical study of partial annealing of a neural network model2010

    • Author(s)
      Tatsuya Uezu
    • Journal Title

      Journal of Physics A 43

      Pages: 025004-1-025004-22

    • Peer Reviewed
  • [Journal Article] An analytic solution of the cable equation predicts frequency preference of a passive shunt-end cylindrical cable in response to extracellular oscillating electric fields2010

    • Author(s)
      Hiromu Monai
    • Journal Title

      Biophysical Journal 98

      Pages: 524-533

    • Peer Reviewed
  • [Journal Article] Influence of coherence between multiple cortical columns on alpha rhythm : A computational modeling study2010

    • Author(s)
      Yasushi Naruse
    • Journal Title

      Human Brain Mapping (印刷中(掲載確定))

    • Peer Reviewed
  • [Journal Article] Optimal node perturbation in linear perceptrons with uncertain eligibility trace2010

    • Author(s)
      Kentaro Katahira
    • Journal Title

      Neural Networks (印刷中(掲載確定))

    • Peer Reviewed
  • [Journal Article] Statistical-mechanical analysis of attractor dynamics in a hysteretic neuron network2010

    • Author(s)
      Yukihiro Tsuboshita
    • Journal Title

      Journal of the Physical Society of Japan (印刷中(掲載確定))

    • Peer Reviewed
  • [Journal Article] Stability analysis for attractor neural network model of inferior temporal cortex. -relationship between attractor stability and learning order-2010

    • Author(s)
      Tomoyuki Kimoto
    • Journal Title

      Journal of the Physical Society of Japan (印刷中(掲載確定))

    • Peer Reviewed
  • [Journal Article] Statistical mechanics of the delayed reward-based Learning with node perturbation2010

    • Author(s)
      Hiroshi Saito
    • Journal Title

      Journal of the Physical Society of Japan (印刷中(掲載確定))

    • Peer Reviewed
  • [Journal Article] Neuronal population decoding explains the change in signal detection sensitivity caused by task-irrelevant perceptual bias2010

    • Author(s)
      Satohiro Tajima
    • Journal Title

      Neural Computation (印刷中(掲載確定))

    • Peer Reviewed
  • [Journal Article] Effect of slow switching of ensemble teachers in On-line learning2009

    • Author(s)
      Seiji Miyoshi
    • Journal Title

      Journal of the Physical Society of Japan 78

      Pages: 53001-1-53001-4

    • Peer Reviewed
  • [Journal Article] Quantum mean-field decoding algorithm for error-correcting codes2009

    • Author(s)
      Jun-ichi Inoue
    • Journal Title

      Journal of Physics : Conference Series 143

      Pages: 012019-1-012019-10

    • Peer Reviewed
  • [Journal Article] Bayes-optimal solution to inverse halftoning based on statistical mechanics of the Q-Ising model. Bayes-optimal solution to inverse halftoning based on statistical mechanics of the Q-Ising model2009

    • Author(s)
      Yohei Saika
    • Journal Title

      Central European Journal of Physics 7

      Pages: 444-456

    • Peer Reviewed
  • [Journal Article] Transfer matrix method for instantaneous spike rate estimation. Transfer matrix method for instantaneous spike rate estimation2009

    • Author(s)
      Kazuho Watanabe
    • Journal Title

      IEICE Transactions on Information and Systems E92.D

      Pages: 1362-1368

    • Peer Reviewed
  • [Journal Article] Variational Bayesian mixture model on a subspace of exponential family distributions2009

    • Author(s)
      Kazuho Watanabe
    • Journal Title

      IEEE Transactions on Neural Networks 20

      Pages: 1783-1796

    • Peer Reviewed
  • [Journal Article] Statistical mechanics of on-line mutual learning with many linear perceptrons2009

    • Author(s)
      Kazuyuki Hara
    • Journal Title

      Journal of the Physical Society of Japan 78

      Pages: 114001-1-114001-5

    • Peer Reviewed
  • [Journal Article] Neural network model with discrete and continuous information representation2009

    • Author(s)
      Jun Kitazono
    • Journal Title

      Journal of the Physical Society of Japan 78

      Pages: 114801-1-114801-7

    • Peer Reviewed
  • [Journal Article] Applying manifold learning to plotting approximate contour trees2009

    • Author(s)
      Shigeo Takahashi
    • Journal Title

      IEEE Transactions on Visualization and Computer Graphics 15

      Pages: 1185-1192

    • Peer Reviewed
  • [Journal Article] Statistical mechanics of attractor neural network models with synaptic depression2009

    • Author(s)
      Yasuhiko Igarashi
    • Journal Title

      Journal of Physics : Conference Series 197

      Pages: 012018-1-012018-10

    • Peer Reviewed
  • [Journal Article] Is the Langevin phase equation an efficient model for oscillating neurons?2009

    • Author(s)
      Keisuke Ota
    • Journal Title

      Journal of Physics : Conference Series 197

      Pages: 012016-1-012016-10

    • Peer Reviewed

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Published: 2011-06-16   Modified: 2016-04-21  

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