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Affiliation
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Faculty of Science and Technology, Department of Applied Physics and Physico-Informatics (Yagami)
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Position
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Assistant Professor/Senior Assistant Professor
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Related Websites
KITAHARA Daichi
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Profile Summary 【 Display / hide 】
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My research interests include theories and methods in optimization, signal processing and data science, and their applications including deep learning. Our goal on the theoretical aspect is to “create innovative algorithms that can solve inverse problems in various fields” mainly via convex optimization techniques. On the application aspect, we aim to “apply cutting-edge mathematics to real-world data and introduce it into operational systems,” e.g., in the weather radar field.
Career 【 Display / hide 】
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2014.04-2017.03
Japan Society for the Promotion of Science (JSPS), Research Fellowship for Young Scientists (DC1)
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2017.04-2022.03
Ritsumeikan University, College of Information Science and Engineering, Audio and Visual Media Technology Course, Assistant Professor
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2022.04-2024.03
Osaka University, Graduate School of Engineering, Division of Electrical, Electronic and Infocommunications Engineering, Specially Appointed Researcher
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2022.06-Present
Institute of Physical and Chemical Research (RIKEN), RIKEN Center for Computational Science (R-CCS), Data Assimilation Research Team, Visiting Researcher
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2024.04-Present
Keio University, Faculty of Science and Technology, Department of Applied Physics and Physico-Informatics, Senior Assistant Professor
Academic Background 【 Display / hide 】
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2012.03
Tokyo Institute of Technology, School of Engineering, Department of Computer Science
University, Graduated
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2014.03
Tokyo Institute of Technology, Graduate School of Science and Engineering, Department of Communications and Integrated Systems
Graduate School, Completed, Master's course
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2017.03
Tokyo Institute of Technology, Graduate School of Science and Engineering, Department of Communications and Computer Engineering
Graduate School, Completed, Doctoral course
Academic Degrees 【 Display / hide 】
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Bachelor (Engineering), Tokyo Institute of Technology, Coursework, 2012.03
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Master (Engineering), Tokyo Institute of Technology, Coursework, 2014.03
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Ph.D. (Engineering), Tokyo Institute of Technology, Coursework, 2017.03
Research Areas 【 Display / hide 】
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Natural Science / Applied mathematics and statistics
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Informatics / Mathematical informatics
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Informatics / Soft computing
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Measurement engineering
Research Keywords 【 Display / hide 】
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Optimization
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Signal Processing
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Deep Learning
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Weather Radar
Papers 【 Display / hide 】
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Introduction of lightning into the GSMaP rainfall measurements through optimized power law model
A. Veloria, Y. Wada, H. Hirose, D. Kitahara, S. Hayashi, T. Ushio
Journal of Atmospheric and Oceanic Technology 42 2025.05
Research paper (scientific journal), Joint Work, Accepted, ISSN 0739-0572
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フェーズドアレイ気象レーダーにおけるテンソル信号処理を用いた干渉除去手法の検討
H. Matsumoto, D. Kitahara, Y. Wada, T. Ushio
Proceedings of the 103rd Research Meeting of the Society of Atmospheric Electricity of Japan 79 - 80 2025.04
Research paper (conference, symposium, etc.), Joint Work
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MMSE beamforming with the consistency of multiple covariance matrices for phased array weather radar
S. Naito, D. Kitahara
IEICE Technical Report 124 ( 390 ) 239 - 244 2025.03
Research paper (conference, symposium, etc.), Joint Work, Last author
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1D nonnegative spline smoothing by convex semi-infinite programming
H. Arai, D. Kitahara
IEICE Technical Report 124 ( 390 ) 233 - 238 2025.03
Research paper (conference, symposium, etc.), Joint Work, Last author
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Validation of the optimality and usefulness of tight windows designed via manifold optimization
K. Takahashi, D. Kitahara
IEICE Technical Report 124 ( 390 ) 227 - 232 2025.03
Research paper (conference, symposium, etc.), Joint Work, Last author
Reviews, Commentaries, etc. 【 Display / hide 】
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Basics of piecewise polynomials and spline functions: Let's make line charts smooth
D. Kitahara
Journal of the Acoustical Society of Japan 78 ( 10 ) 570 - 577 2022.10
Article, review, commentary, editorial, etc. (scientific journal), Single Work, Lead author, Last author, Corresponding author, ISSN 0369-4232
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Spline basics and its application to quantile regression
D. Kitahara
IEICE Technical Report 120 ( 142 ) 37 - 42 2020.08
Research paper, summary (national, other academic conference), Single Work, Lead author, Last author
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Basics of compressed sensing and its application to image acquisition
A. Hirabayashi, D. Kitahara
Japanese Journal of Optics 46 ( 10 ) 393 - 397 2017.10
Article, review, commentary, editorial, etc. (scientific journal), Joint Work, Last author, ISSN 0389-6625
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Continuation of phase―Algebraic phase unwrapping and its applications
I. Yamada, D. Kitahara
Proceedings of the 2016 IEICE Society Conference SS14 - SS15 2016.09
Research paper, summary (national, other academic conference), Joint Work, Last author
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二次元位相アンラップ問題の難しさと面白さ
D. Kitahara
The 29th IEICE SIP Symposium 2014.11
Lecture material (seminar, tutorial, course, lecture, etc.), Single Work, Lead author, Last author
Presentations 【 Display / hide 】
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フェーズドアレイ気象レーダーのアンテナ素子較正による適応型ビーム形成手法の性能向上
Y. Wada, H. Kikuchi, D. Kitahara, E. Yoshikawa, T. Ushio
日本地球惑星科学連合2025年大会,
2025.05,Oral presentation (general)
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Phased and amplitude correction using hard target detection for phased array weather radar
Y. Wada, H. Kikuchi, E. Yoshikawa, D. Kitahara, T. Ushio
AGU Annual Meeting 2024 (Washington, D.C.) ,
2024.12,Oral presentation (general)
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フェーズドアレイ気象レーダーにおける凸最適化を用いた干渉除去手法の検討
H. Matsumoto, D. Kitahara, Y. Wada, T. Ushio
フェーズドアレイ気象レーダー研究会 (大阪) ,
2024.10-2024.11,Poster presentation
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Ku帯二重偏波気象レーダの降水強度推定精度検証
T. Hayakawa, Y. Wada, D. Kitahara, Y. Nakamura, T. Iguchi, T. Ushio
フェーズドアレイ気象レーダー研究会 (大阪) ,
2024.10-2024.11,Poster presentation
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フェーズドアレイ技術における適応型信号処理の高速化と高精度化
Y. Wada, H. Kikuchi, D. Kitahara, E. Yoshikawa, S. Shimamura, T. Ushio
フェーズドアレイ気象レーダー研究会 (大阪) ,
2024.10-2024.11,Oral presentation (general)
Research Projects of Competitive Funds, etc. 【 Display / hide 】
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2重偏波フェーズドアレイレーダネットワークに関する研究
2024.04-2027.03科研費 基盤研究 (A), No Setting, Coinvestigator(s)
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気候の年々変動と極端気象がパナマ運河流域水循環に与える影響の要因解明
2023.09-2029.03科研費 国際共同研究加速基金 (海外連携研究), No Setting, Coinvestigator(s)
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科学的モデリングによる気象レーダの高解像度化
2021.04-2024.03科研費 基盤研究 (B), No Setting, Coinvestigator(s)
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ノイズロバストな透視可視化に基づく，大規模文化遺跡の３次元計測ビッグデータ活用
2019.10-2024.03科研費 国際共同研究強化 (B), No Setting, Coinvestigator(s)
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エッジ保存スプライン平滑化による不連続箇所を含む関数の推定とその応用に関する研究
2019.04-2023.03科研費 若手研究, No Setting, Principal investigator
Intellectual Property Rights, etc. 【 Display / hide 】
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信号処理装置、信号処理方法およびプログラム
Date applied： 2014-511131 2013.10
Date announced： WO2013/157299
Date issued： 6041325
Patent, Joint
Awards 【 Display / hide 】
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第32回回路とシステムワークショップ奨励賞
北原 大地, 2020.08, IEICE 回路とシステムワークショップ実行委員会
Type of Award： Award from Japanese society, conference, symposium, etc.
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東京電機大学 丹羽保次郎記念論文賞
北原 大地, 2018.02, 東京電機大学
Type of Award： Other
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東京工業大学 手島精一記念研究賞 (博士論文賞)
北原 大地, 2018.02, 東京工業大学
Type of Award： Other
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IEEE Signal Processing Society Japan Student Journal Paper Award
北原 大地, 2016.12, IEEE Signal Processing Society Tokyo Joint Chapter
Type of Award： Award from Japanese society, conference, symposium, etc.
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IEEE Computational Intelligence Society Japan Chapter Young Researcher Award
北原 大地, 2016.07, IEEE Computational Intelligence Society Japan Chapter
Type of Award： Award from Japanese society, conference, symposium, etc.
Courses Taught 【 Display / hide 】
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APPLIED PHYSICS AND PHYSICO-INFORMATICS LABORATORY C
2025
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APPLIED PHYSICS AND PHYSICO-INFORMATICS LABORATORY D
2025
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SIGNAL PROCESSING FOR MEASUREMENT & INSTRUMENTATION
2025
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PRESENTATION TECHNIQUE
2025
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LABORATORIES IN SCIENCE AND TECHNOLOGY
2025