OKANO Dai

J-GLOBAL         Last updated: Aug 28, 2017 at 13:17
 
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Name
OKANO Dai
E-mail
okanocs.ehime-u.ac.jp
Affiliation
Ehime University
Section
Graduate School of Science and Engineering Electrical and Electronic Engineering and Computer Science
Job title
Associate Professor

Research Areas

 
 

Academic & Professional Experience

 
Apr 2007
 - 
Today
Associate Professor, Graduate School of Science and Engineering, Ehime University
 
Nov 2006
 - 
Mar 2007
Associate Professor, Faculty of Engineering, Department of Computer Sciences, Ehime University
 
Apr 1997
 - 
Nov 2006
Research Associate, Faculty of Engineering, Department of Computer Sciences, Ehime University
 

Awards & Honors

 
 
A Systematic Scheme of Numerical Conformal Mappings of Unbounded Multiply-connected Domains by the Charge Simulation Method, the Anniversary Best Paper Award (40th), Information Processing Society of Japan
Winner: Kaname Amano, Dai Okano, Hidenori Ogata, Hiromi Shimohira, and Masaaki Sugihara
 

Published Papers

 
Keiichi Endo,Ayame Onoyama,Dai Okano,Yoshinobu Higami,Shin-ya Kobayashi
Intelligent Information and Database Systems - 9th Asian Conference, ACIIDS 2017, Kanazawa, Japan, April 3-5, 2017, Proceedings, Part I   10191 345-354   2017   [Refereed]
Amano Kaname, Okano Dai, Endo Keiichi, Ogata Hidenori
Transactions of the Japan Society for Industrial and Applied Mathematics   24(3) 157-183   Sep 2014
In the conformal mapping of multiply connected domains, the following five canonical slit domains listed by Nehari (1952) are well known: the parallel, circular and radial slit domains, and the circle and circular ring with concentric circular sli...
天野要, 岡野大, 遠藤慶一, 緒方秀教
日本応用数理学会論文誌   24(3) 157-183   Sep 2014
Keiichi Endo,Akinobu Imaoka,Dai Okano,Kaname Amano
JNW   9(7) 1665-1673   2014   [Refereed]
Dai Okano, Kaname Amano
Information (Japan)   17 7-13   Jan 2014
In this paper, we present a method to compose conformal mapping functions of arbitrary given simply connected domains which are bounded by the smooth boundary curves of finite length onto the unit disk as the standard domain. The Riemann mapping t...
K. Amano, D. Okano, K. Endo, H. Ogata
Information (Japan)   16 8575-8578   Dec 2013
We present a numerical method for the conformal mapping of unbounded multiply connected domains exterior to closed Jordan curves onto the general spiral slit domain, which is a natural extension of the circular and radial slit domains. ©2013 Inter...
Keiichi Endo,Kentaro Watanabe,Dai Okano,Kaname Amano
JNW   8(4) 804-811   2013   [Refereed]
天野要, 大矢拓也, 荒木章太, 長内祐, 遠藤慶一, 岡野大, 小西敏雄, 福士こう士, 濱田治良
情報処理学会論文誌ジャーナル(Web)   54(9) WEB ONLY 2254-2264-2264   Sep 2013
The transformational group structure theory successfully explains how the different types of cognitive judgments of patterns such as similarity and goodness are performed by the concept of cognitive transformation groups and transformational group...
Kaname Amano, Dai Okano
Theoretical and Applied Mechanics Japan   60 317-332   Jul 2012
Conformal mappings are familiar in science and engineering. Recently, the problem of multiply connected domains has attracted special interest. We here present a unified scheme for numerical conformal mappings of unbounded, multiply connected doma...
Dai Okano, Keiichi Endo, Kaname Amano
Theoretical and Applied Mechanics Japan   60 333-341   Jul 2012
Seamless availability on applying to the problems of various types of simply and multiply connected domains is one of the key features of Amano's method of numerical conformal mappings. We studied the application of the method for a doubly connect...
Keiichi Endo,Ryosuke Hamabe,Dai Okano,Kaname Amano
JCM   7(4) 349-356   2012   [Refereed]
Kaname Amano, Dai Okano, Hidenori Ogata, Masaaki Sugihara
Japan Journal of Industrial and Applied Mathematics   29(2) 165-186   Jun 2012   [Refereed]
We propose a numerical method for the conformalmapping of unbounded multiply connected domains exterior to closed Jordan curvesC1, . . . ,Cn onto a canonical linear slit domain, which is the entire plane with linear slits S 1, . . . , S n of angle...
Proposal of a Flooding-based Flexible Search Method for Chord Networks
Global Journals Inc.Global Journal of Computer Science and Technology   11(11) 1-7   2011
YAMAMOTO Hiroki, ENDO Keiichi, OKANO Dai, AMANO Kaname
The IEICE transactions on information and systems   93(7) 1082-1090   Jul 2010
近年,非構造化P2Pネットワークにおいては様々な検索手法が提案されているが,一般に検索速度と通信負荷はトレードオフの関係にある.すなわち,目的ファイルを短時間で発見できる検索手法は,一般に通信負荷が高い.本論文では,Acquaintance Link,Light Floodという二つの既存手法を組み合わせることにより,検索速度向上と通信負荷軽減を同時に実現する手法を提案する.
天野要, LI Tao, 遠藤慶一, 岡野大
情報処理学会論文誌トランザクション(CD-ROM)   2009(2) KONPYUTINGUSHISUTEMU.VOL.2,NO.4,83-94   Apr 2010
天野 要, 李 涛, 遠藤 慶一, 岡野 大
情報処理学会論文誌コンピューティングシステム(ACS)   2(4) 83-94   Dec 2009
数値等角写像は科学技術計算の重要な研究課題である.この論文では非有界な多重連結領域から一般的な正準平行スリット領域と共線スリット領域への数値等角写像の方法を提案し,その有効性を数値実験で検証する.この方法では,代用電荷法に基づいて一対の調和関数を複素対数ポテンシャルの 1 次結合で近似し,表現が簡潔で精度の高い近似写像関数を構成することができる.Numerical conformal mappings are important in scientific computations. In...
AMANO K.
IPSJ J.   50(8) 1775-1779   Aug 2009
様々な正準スリット領域への数値等角写像は科学技術計算において重要である.この論文では,代用電荷法を用いて非有界な多重連結領域から直線スリット領域への数値等角写像の方法を提案し,その有効性を簡単な数値例で示す.この正準領域はポテンシャル流問題で広く知られる平行スリット領域の一般化になっている.Numerical conformal mappings onto canonical slit domains are important in scientific computations. In...
Amano Kaname, Okano Dai, Li Tao, Ootori Hirokatsu
RIMS Kokyuroku   1618 127-141   Dec 2008
天野 要, 荒木 正人, 岡野 大, 小西 敏雄, 福士 こう士, 濱田 治良
情報処理学会論文誌   49(7) 2667-2678   Jul 2008
変換群構造説では,人(認知系)は提示されたパターンに対していくつかの変換群(認知的変換群)を施し,相互変換可能性や不変性によってその構造(変換群構造)を認知し,この認知された変換群構造に基づいてパターン対の類似性判断やパターンの良さ判断を行うと考える.実験はその妥当性を支持している.しかし,パターンを構成する2値要素の数の増加とともに空変換群構造(相互変換可能性や不変性を持たないことを意味する)の占める割合が急増し,大多数のパターン対の類似度やパターンの良さが区別できなくなるという困難があ...
A Numerical Conformal Mapping onto the Parallel Slit Domain and the Laurent Expansion of Mapping Functions
Li Tao, Okano Dai, Amano Kaname
INFORMATION-AN INTERNATIONAL INTERDISCIPLINARY JOURNAL   11(2) 191-203   Mar 2008   [Refereed]
Statistical Test of the Order Predicted by the Transformational Group Structure Theory
Konishi Toshio, Okano Dai, Amano Kaname
INFORMATION-AN INTERNATIONAL INTERDISCIPLINARY JOURNAL   11(2) 239-248   Mar 2008   [Refereed]
Okano Dai, Sugihara Masaaki, Amano Kaname
RIMS Kokyuroku   1573 1-12   Nov 2007
天野要, 岡野大, 荒木正人, 小西敏雄
情報処理学会論文誌   47(8) 2807-2811   Aug 2006
An experiment of similarity judgment of linear binary pattern pairs shows that intra-pattern transformational group structures affect the easiness and the clearness of inter-pattern transformational group structures, which causes the difference of...
岡野大, 天野要, 荒木正人, 小西敏雄
情報処理学会論文誌   47(6) 1986-1997   Jun 2006
The transformational group structure theory predicts ordinal relations of the similarity of pattern pairs by the concept of inter-pattern transformational group structures, which are defined by mutual transformability using cognitive transformatio...
Dai Okano, Masatoshi Terazono, Kaname Amano, Hidenori Ogata
Theoretical and Applied Mechanics Japan   54 357-363   Dec 2005
Usually, on computation of conformal mappings, different methods are used to obtain the mapping functions of two directions between a problem domain and a canonical domain. Amano proposed a method based on the numerical conformal mappings by the c...
天野要, 岡野大, 小西敏雄
電子情報通信学会技術研究報告   105(208(KBSE2005 11-15)) 1-6   Jul 2005
The transformational group structure theory explains how different types of cognitive judgments of patterns such as similarity and goodness are performed, and predicts their ordinal relations by the concepts of transformational group structures us...
岡野大, 寺薗正俊, 天野要, 緒方秀教
理論応用力学講演会講演論文集   54th(0) 221-222   Jan 2005
On computation of conformal mappings, the mapping functions between a given problem domain and its corresponding canonical domains are concerned.Usually, two different methods are used to obtain the mapping functions, which map the problem domain ...
天野要, 玉井政行, 岡野大, 緒方秀教, 杉原正顕
情報処理学会論文誌   45(5) 1322-1325   May 2004
In this paper, we propose a method of conformal mapping w = f (z) of an unbounded multiply-connected domain D subject to the condition f (∞) = ∞, where v is a given finite point in the problem domain. In the method, we reduce the mapping problem t...
AMANO Kaname, OKANO Dai, ARAKI Masato, KONISHI Toshio
Annual journal of engineering, Ehime University   4 129-139   Mar 2004
The transformational group structure theory explains how different types of cognitive judgments of patterns such as similarity and goodness are performed, and predicts their ordinal relations by the concepts of cognitive transformation groups and ...
Ogata Hidenori, Amano Kaname, Okano Dai, Yasuda Yuji, Sugihara Masaaki
RIMS Kokyuroku   1352 140-152   Jan 2004
Amano Kaname, Tamai Masayuki, Okano Dai, Ogata Hidenori, Sugihara Masaaki
RIMS Kokyuroku   1352 127-139   Jan 2004
Dai Okano, Hidenori Ogata, Kaname Amano, Masaaki Sugihara
Journal of Computational and Applied Mathematics   159 109-117   Oct 2003
We present here a simple method of numerical conformal mappings from bounded multiply connected domains onto the bounded canonical slit domains of Nehari, i.e., a disk with concentric circular slits, and an annulus with concentric circular slits. ...
小西敏雄, 岡野大, 緒方秀教, 芝田安裕, 天野要, 福士こう士, 浜田治良, 今井四郎
情報処理学会論文誌   44(8) 2274-2283   Aug 2003
The transformational structure theory explains how different types of cognitive judgment of patterns such as similarity and goodness are performed, and predicts their ordinal relations by the concepts of cognitive tranformations and transformation...
Dai Okano, Hidenori Ogata, Kaname Amano
Journal of Computational and Applied Mathematics   152 441-450   Mar 2003
In this paper, we propose a method of numerical conformal mappings from a domain with a curved slit onto the canonical slit domains. Our method is based on Amano's method, which uses the charge simulation method as a rapid solver for potential pro...
Hidenori Ogata, Kaname Amano, Masaaki Sugihara, Dai Okano
Journal of Computational and Applied Mathematics   152 411-425   Mar 2003
We present here a fundamental solution method for two-dimensional viscous flow problems with obstacles in a two-dimensional periodic array. Our problem is mathematically a boundary value problem of the Stokes equations with periodic boundary condi...
Hidenori Ogata, Dai Okano, Masaaki Sugihara, Kaname Amano
Japan Journal of Industrial and Applied Mathematics   20 17-35   Feb 2003
We show that the linear system appearing in the invariant scheme of the charge simulation method is uniquely solvable when the scheme is applied to a two-dimensional Dirichlet problem for a disk, for an ellipse, and for an annulus with properly ch...
芝田安裕, 高崎昌浩, 小西敏雄, 岡野大, 緒方秀教, 天野要
情報処理学会論文誌   43(12) 4067-4070   Dec 2002
We extend the transformational group structure theory on similarity judgments of one dimensional elliptic patterns (linear binary patterns) to that of two-dimensional dot patterns (square binary matrix patterns). Specifically speaking, we define t...
Hidenori Ogata, Dai Okano, Kaname Amano
Japan Journal of Industrial and Applied Mathematics   19 257-275   Jun 2002
We propose a method of numerical conformal mapping of periodic structure domains onto periodic parallel slit domains. In the method presented here, the mapping problem is reduced to a Dirichlet one for a pair of conjugate harmonic functions with a...
岡野大, 牧直正, 緒方秀教, 天野要
情報処理学会論文誌   43(5) 1382-1389   May 2002
We present a method of numerical conformal mapping of a bounded multiply-connected domain onto a circular annulus with concentric circular slits. In the method, we reduce the mapping problem to a Dirichlet one for a pair of conjugate harmonic func...
Dai Okano, Hidenori Ogata, Kaname Amano
Theoretical and Applied Mechanics Japan   50 303-309   Dec 2001
Recently, we proposed an integrated method for the problem of numerical conformal mappings of the unbounded multiply-connected domains onto the canonical slit domains of Nehari(l952). The problem is important in potential flow analysis. Our method...
天野要, 岡野大, 緒方秀教, 芝田安裕, 小西敏雄, 福士こう士, 浜田治良, 今井四郎
情報処理学会論文誌   42(11) 2733-2742   Nov 2001
The transformational structure theory systematically explains how different types of cognitive judgments of patterns such as similarity and goodness are performed, and predicts their ordinal relations by the concepts of cognitive tranformations an...
天野要, 岡野大, 緒方秀教, 下平博巳, 杉原正顕
情報処理学会論文誌   42(3) 385-395   Mar 2001
The parallel, circular and radial slit domains are the entire planes with parallel rectilinear slits, circular slits concentric to the origin and radial slits pointing at the orgin, respectively. We here present a simple method of numerical confor...
天野要, 芝田安裕, 岡野大, 緒方秀教, 小西敏雄
情報処理学会研究報告   2001(6(CH-49)) 33-40   Jan 2001
The transformational structure theory systematically explains how different types of cognitive judgments of patterns such as similarity and goodness are performed, and predicts their ordinal relations by the concepts of cognitive tranformations an...
天野要, 岡野大, 緒方秀教
情報処理学会論文誌   41(4) 998-1008   Apr 2000
We present a method of numerical conformal mapping of multiply-connected domains with closed boundary Jordan curves onto the unit disk with concentric circular slits. It is a basic problem of conformal mapping of multiply-connected domains. If the...
Tetsuo Inoue, Kaname Amano, Dai Okano
Theoretical and Applied Mechanics   48 425-429   Dec 1999
The numerical schemes for computing the approximations have been recently proposed for interior and exterior conformal mappings by Inoue (1997). The theoretical base and the mathematical properties of the schemes are studied in this paper. The bas...
OKANO Dai, OGATA Hidenori, AMANO Kaname, INOUE Tetsuo
Transactions of Information Processing Society of Japan   39(12) 3337-3340   Dec 1998
In this note, we present a method of approximating the real function f(x)analytic on a bounded closed interval by applying the charge simulation method and the Joukowski transformation.

Misc

 
天野要, 岡野大, 緒方秀教, 猪狩勝寿, 津田光一, 杉原正顕
愛媛大学工学部紀要   19(19) 387-399   Feb 2000
小西敏雄, 芝田安裕, 岡野大, 緒方秀教, 天野要
愛媛大学工学部紀要   20 277-286   Feb 2001
片山茂, 岡野大, 緒方秀教, 天野要
愛媛大学工学部紀要   20 253-263   Feb 2001
芝田安裕, 小西敏雄, 岡野大, 緒方秀教, 天野要
愛媛大学工学部紀要   20 265-275   Feb 2001
Hiromi Shimohira, Kaname Amano, Dai Okano
Memoirs of the Faculty of Engineering, Ehime University   17 453-461   Feb 1998
岡野大, 伊賀上義夫, 天野要
愛媛大学工学部紀要   18(18) 467-470   Feb 1999
天野要, 岡野大, 荒木正人, 小西敏雄
愛媛大学工学部工学ジャーナル   4 129-139   Mar 2005
伊賀上義夫, 岡野大, 緒方秀教, 天野要
愛媛大学工学部紀要   19 401-410   Feb 2000
下平博巳, 岡本毅, 前田太, 岡野大, 天野要
愛媛大学工学部紀要   18 471-483   Feb 1999

Conference Activities & Talks

 
安永竜矢, 遠藤慶一, 岡野大
電気関係学会四国支部連合大会講演論文集(CD-ROM)   26 Sep 2015   
堀尾凌生, 遠藤慶一, 岡野大
電気関係学会四国支部連合大会講演論文集(CD-ROM)   26 Sep 2015   
富松秀博, 岡野大, 遠藤慶一, 内山龍
電気関係学会四国支部連合大会講演論文集(CD-ROM)   26 Sep 2015   
内山龍, 岡野大, 遠藤慶一
日本応用数理学会年会講演予稿集(CD-ROM)   2 Sep 2015   
富松秀博, 岡野大, 遠藤慶一, 本田仁
電気関係学会四国支部連合大会講演論文集(CD-ROM)   12 Sep 2014