Researcher Database

Hideyuki Imai
Faculty of Information Science and Technology Computer Science and Information Technology Mathematical Science
Professor

Researcher Profile and Settings

Affiliation

  • Faculty of Information Science and Technology Computer Science and Information Technology Mathematical Science

Job Title

  • Professor

Degree

  • (BLANK)(Hokkaido University)
  • (BLANK)(Hokkaido University)

J-Global ID

Research Interests

  • 統計学   Statistics   

Research Areas

  • Informatics / Statistical science

Association Memberships

  • 日本行動計量学会   日本統計学会   

Research Activities

Books etc

  • On detecting interactions in Hayashi's second method of quantification. 'jointly worked'
    Modeling Decisions for Artificial Intelligence 2004
  • Algorthm based on alternative projections for a fuzzy measure identification problem 'jointly worked'
    Information Fusion in Data Mining, Springer 2003
  • Algorthm based on alternative projections for a fuzzy measure identification problem 'jointly worked'
    Information Fusion in Data Mining, Springer 2003

MISC

  • Akira Tanaka, Hideyuki Imai, Mineichi Kudo, Masaaki Miyakoshi  PATTERN RECOGNITION  40-  (11)  2930  -2938  2007/11  [Not refereed][Not invited]
     
    Kernel machines are widely considered to be powerful tools in various fields of information science. By using a kernel, an unknown target is represented by a function that belongs to a reproducing kernel Hilbert space (RKHS) corresponding to the kernel. The application area is widened by enlarging the RKHS such that it includes a wide class of functions. In this study, we demonstrate a method to perform this by using parameter integration of a parameterized kernel. Some numerical experiments show that the unresolved problem of finding a good parameter can be neglected. (c) 2007 Pattern Recognition Society. Published by Elsevier Ltd. All rights reserved.
  • 線形制約の一般解によるパラメトリック部分射影フィルタの解釈とアフィン制約付き復元問題への応用
    田中章, 今井英幸, 宮腰政明  電子情報通信学会論文誌  J89-A-  (8)  679  -681  2006  [Not refereed][Not invited]
  • AHPの感度分析結果を用いた代替案ウェイトについて
    大西真一, 山ノ井高洋, 今井英幸  北海学園大学工学部研究報告  32-  167  -174  2005  [Not refereed][Not invited]
  • On formulations and solutions in linear image restoration problems
    A Tanaka, H Imai, M Miyakoshi  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES  E87A-  (8)  2144  -2151  2004/08  [Not refereed][Not invited]
     
    In terms of the formulation of the optimality, image restoration filters can be divided into two streams. One is formulated as an optimization problem in which the fidelity of a restored image is indirectly evaluated, and the other is formulated as an optimization problem based on a direct evaluation. Originally, the formulation of the optimality and the solutions derived from the formulation are identical each other. However in many studies adopting the former stream, an arbitrary choice of a solution without a mathematical ground passes unremarked. In this paper, we discuss the relation between the formulation of the optimality and the solution derived from the formulation from a mathematical point of view, and investigate the relation between a direct style formulation and an indirect one. Through these analyses, we show that the both formulations yield the identical filter in practical situations.
  • Enhanced interval splitting and bounding for global optimization
    RW Mwangi, H Imai, Y Sato  IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES  E87A-  (8)  2120  -2125  2004/08  [Not refereed][Not invited]
     
    In order to produce precise enclosures from a multidimensional interval vector, we introduce a sharp interval sub-dividing condition for optimization algorithms. By utilizing interval inclusion properties, we also enhance the sampling of an upper bound for effective use in the interval quadratic method. This has resulted in an improvement in the algorithm for the unconstrained optimization problem by Hansen in 1992.
  • On detecting interactions in Hayashi's second method of quantification
    H Imai, D Izawa, K Yoshida, Y Sato  MODELING DECISIONS FOR ARTIFICIAL INTELLIGENCE, PROCEEDINGS  3131-  205  -214  2004  [Not refereed][Not invited]
     
    The method of quantification were developed and investigated for the purpose of analyzing qualitative data. In the second method of quantification, the matter of interest is to discriminate the categories of the response variable. For that purpose, numerical scores of each categories are introduced so that the categories of the response variable can be discriminated as well as possible by those score. Since the total score is the sum of each category's score, the model is an additive model. Thus, if observations have a synergism, the method fails to grasp the structure. As a consequence, the response variable seems not to be discriminated by the method. In this paper, we propose an extension of Hayashi's second method of quantification by applying a fuzzy integral approach. To use the degree of decomposition of scores, we can include interactions between categories to the model.
  • K Yoshida, H Imai, Y Sato  COMMUNICATIONS IN STATISTICS-THEORY AND METHODS  33-  (11-12)  2799  -2816  2004  [Not refereed][Not invited]
     
    In this paper, tests of dimensionality in the multivariate analysis of variance model under elliptical populations are considered. We show that the upper bounds proposed by Yoshida et al. [Yoshida, K., Imai. H., Sato, Y. (2002). New criteria for tests of dimensionality under elliptical populations. J Japan Statist. Soc. 32:183-192] are upper limits for likelihood ratio (LR), Lawley-Hotelling (LH), and Bartlett-Nanda-Pillai (BNP) criteria under elliptical populations.
  • Mwangi, R. W, Imai, H, Sato. Y  Journal of the Japanese Society of Computational Statistics  17-  (1)  21  -31  2004  [Not refereed][Not invited]
  • Image Enlargement Based on Kernel Component Estimation (共著)
    International Journal of Computing Anticipatory Systems  15, 97-108-  2004  [Not refereed][Not invited]
  • On Formulations and Solutions in Linear Image Restoration Problems (共著)
    IEICE Transactions on Fundamentals  E87-A-  (8)  2144  -2151  2004  [Not refereed][Not invited]
  • Properties of the solution set of a fuzzy relation equation form the viewpoint of attainability (共著)
    Soft Computing  6(2), 87-91-  2002  [Not refereed][Not invited]
  • Parameter estimation and image restoration using the families of projection filters and parametric projection filters (共著)
    IEICE Transactions on Fundamentals of Electronics, Communications, and Computer Sciences  E85-A(8), 1966-1969-  2002  [Not refereed][Not invited]
  • Parameter estimation and image restoration using the families of projection filters and parametric projection filters (共著)
    IEICE Transactions on Fundamentals of Electronics, Communications, and Computer Sciences  E85-A(8), 1966-1969-  2002  [Not refereed][Not invited]
  • Properties of the solution set of a fuzzy relation equation form the viewpoint of attainability (共著)
    Soft Computing  6(2), 87-91-  2002  [Not refereed][Not invited]
  • Fuzzy Sets and Systems  109-  (3)  405  -408  2000  [Not refereed][Not invited]
  • The family of regularized parametric projection filters for digital image restoration. (共著)
    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences.  E82-A-  (3)  527  -534  1999  [Not refereed][Not invited]
  • Fuzzy Sets and Systems.  99-  (2)  193  -196  1998  [Not refereed][Not invited]
  • IEEE Transactions on Fuzzy Systems.  6-  (1)  90  -101  1998  [Not refereed][Not invited]
  • 摂動法を用いた最適画像復元フィルタの評価(共著)
    電子情報通信学会論文誌  J80-D-II-  (3)  754  -761  1997  [Not refereed][Not invited]
  • 摂動に対する射影フィルタ族の性質(共著)
    電子情報通信学会論文誌  J80-D-II-  (5)  1128  -1135  1997  [Not refereed][Not invited]
  • On restoration of overlapping images. (共著)
    IEICE Transactions on Information and Systems.  E80-D-  (12)  1190  -1194  1997  [Not refereed][Not invited]
  • Fuzzy Sets and Systems.  90-  (3)  335  -340  1997  [Not refereed][Not invited]
  • The family of parametric projection filters and its properties for perturbation. (共著)
    IEICE Transactions on Information and Systems.  E80-D-  (8)  788  -794  1997  [Not refereed][Not invited]
  • Properties of the Family of Projection Filters for a Perturbation of Operators.
    The Transactions of the Institute of Electronics, Information and Communication Engineers  J80-D-II-  (5)  1128  -1135  1997  [Not refereed][Not invited]
  • Evaluation of Optimum Image Restoration Filters by Perturbation of a Degradation Operator
    The Transactions of the Institute of Electronics, Information and Communication Engineers  J80-D-II-  (3)  754  -761  1997  [Not refereed][Not invited]
  • ファジィデータに対する射影追跡の適用(共著)
    日本ファジィ学会誌  7-  (6)  1239  -1246  1995  [Not refereed][Not invited]
  • Exploratory Projection Pursuit for Fuzzy Data
    Journal of Japan Society for Fuzzy Theory and Systems  7-  (6)  1239  -1246  1995  [Not refereed][Not invited]
  • 対応分析における布置図の信頼性の視覚的表示法(共著)
    計算機統計学  7-  (2)  17  -23  1994  [Not refereed][Not invited]
  • Graphical Representation of Reliability for Configuration of Correspondence Analysis
    Bulletin of The Conputational Statistics of Japan  7-  (2)  17  -23  1994  [Not refereed][Not invited]
  • 計算機統計学  5-  (2)  101  -106  1992  [Not refereed][Not invited]
  • Bulletin of the Computational Statistics of Japan  5-  (2)  101  -106  1992  [Not refereed][Not invited]

Research Grants & Projects

  • 非線形回帰分析
  • Nonlinear Regression Analysis

Educational Activities

Teaching Experience

  • 情報理論
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 工学部
  • Information and Data Analysis
    開講年度 : 2018
    課程区分 : 修士課程
    開講学部 : 情報科学研究科
    キーワード : 確率・統計,多変量解析,回帰,モデル選択
  • Inter-Graduate School Classes(General Subject):Inter-Disciplinary Sciences
    開講年度 : 2018
    課程区分 : 修士課程
    開講学部 : 大学院共通科目
    キーワード : 数理統計学、多次元データ解析、データマイニング
  • Information and Data Analysis
    開講年度 : 2018
    課程区分 : 博士後期課程
    開講学部 : 情報科学研究科
    キーワード : 確率・統計,多変量解析,回帰,モデル選択
  • Experiment in Computer Science and Information Technology II
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : データベース、Web、機械学習、並列プログラミング
  • Applied Mathematics III
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 複素変数、複素函数、複素積分、ローラン展開、留数解析
  • Teaching Method of School Subjects(Information Ⅱ)
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 教育学部
    キーワード : 教科「情報」,情報A,情報B,情報C,教員の役割,授業内容
  • Statistics
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 平均,分散,標準偏差,確率変数,確率分布,母集団,標本,標本分布,点推定,信頼区間,仮説検定
  • Information and Geometry
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 統計モデル,指数型分布族,スコア関数,Fisher情報量,計量,Kullback-Leibler情報量,接続
  • Exercise in Information and Geometry
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 統計モデル,指数型分布族,スコア関数,Fisher情報量,計量,Kullback-Leibler情報量,接続
  • Teaching Method of School Subjects(Information Ⅰ)
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 教育学部
    キーワード : 教科「情報」,情報A,情報B,情報C,教員の役割,授業内容
  • Experiment in Computer Science Ⅱ
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : データベース、Web、機械学習、並列プログラミング

Campus Position History

  • 2016年4月1日 
    2018年3月31日 
    大学院情報科学研究科副研究科長

Position History

  • 2016年4月1日 
    2018年3月31日 
    大学院情報科学研究科副研究科長


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