Researchers

Research Activities

Research Areas

• Informatics, Information theory

Published Papers

1. Optimal Pricing and Order Quantity for Multi-Product Newsvendor Problem with Demand Predictive Distribution
   Kiyoharu Tagawa; Takashi Ishimizu
   Proc. of SICE Annual Conference  , 1-6, Sep. 2025  , Refereed
2. Concurrent differential evolution for uncertain optimization problems
   田川 聖治; 石水 隆
   The Fifth International Conference on Advanced Engineering Computing and Applications in Sciences  , 48-53, Nov. 2011 
3. Alternative implementation techniques of parallelized Differential Evolution for multi-core processors
   Kiyaharu Tagawa; Takashi Ishimizu
   Proceedings of the International Conference on Uncertainty Reasoning and Knowledge Engineering, URKE 2011  1  , 1-4, 2011  , Refereed

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Conference Activities & Talks

1. An Improved ABC Algorithm for Large-Scale Optimization Problems , Takashi Ishimizu; Kiyoharu Tagawa , 電気学会情報システム部門大会2024 , 4, Sep. 2024
2. 並列差分進化計算の比較研究 , 石水 隆; 田川 聖治 , 情報処理学会 数理モデルと問題解決研究 , Mar. 2011
3. Experiment Study of A Structured Differential Evolution with Mixed Strategies , 石水 隆; 田川 聖治 , World Congress on Nature and Biologocally Inspired Computing , Dec. 2010

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MISC

1. A Comparative Study of Parallel Differential Evolution , 石水 隆; 田川 聖治 , 研究報告数理モデル化と問題解決（MPS） , 2011 , 23 , 1 , 2 , 28, Feb. 2011
   Summary:本稿では差分進化計算 (DE) をプロセッサネットワーク上で並列化した並列差分進化計算 (PDE) を提案する．PDE ではプロセッサごとに異なる戦略を用いることにより，最適化問題に対し効率的，かつ高確率で解を求めることができる．In this paper, a Parallel Differential Evolution (PDE) that is a parallel implement of Differential Evolution (DE) on processor network, is proposed. The proposed PDE uses different strategies in respective processors, the optimal solution are found more efficiently in high probability.
2. Parallel algorithms for the all nearest neighbors of binary image on the BSP model , T Ishimizu; A Fujiwara; M Inoue; T Masuzawa; H Fujiwara , IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS , E83D , 2 , 151 , 158 , Feb. 2000