Takashi Imamichi (今道 貴司)  Takashi Imamichi (今道 貴司) photo         

contact information

Research Staff Member
IBM Research - Tokyo, 19-21, Nihonbashi Hakozaki-cho, Chuo-ku, Tokyo 103-8510 Japan.



The state-of-the-art quantum computer [in Japanese]
Rudy Raymond, Takashi Imamichi
IBM ProVISION92, 50-59, 2017

The Latest Trends and Applications of Quantum Computing [in Japanese]
Takashi Imamichi, Rudy Raymond, Jay M. Gambetta
IPSJ Magazine 58(9), 774-775, 2017


Bus Trajectory Identification by Map-Matching
Rudy Raymond, Takashi Imamichi
International Conference on Pattern Recognition (ICPR-16), pp. 1619-1624, 2016

Truncating Shortest Path Search for Efficient Map-Matching
Takashi Imamichi, Takayuki Osogami, Rudy Raymond
International Joint Conferences on Artificial Intelligence Organization (IJCAI-16), 2016


Monotone Polygonal Chain Representation for Irregular Packing
Takashi Imamichi
27th European Conference on Operational Research, 2015


Two-dimensional Bin Packing Problem with Hatch Constraint
Takashi Imamichi, Bruno da Costa Flach
INFORMS Annual Meeting 2014


Toward simulating entire cities with behavioral models of traffic
Takayuki Osogami, Takaashi Imamichi, Hideyuki Mizuta, Tsuyoshi Ide
IBM Journal of Research and Development 57, 6:1-6:10, 2013

Simple and Fast Trip Generation for Large Scale Traffic Simulation
Takashi Imamichi, Rudy Raymond
Winter Simulation Conference 2013, pp. 2020-2031

IBM Mega Traffic Simulator
Takayuki Osogami, Takashi Imamichi, Hideyuki Mizuta, Tetsuro Morimura, Rudy Raymond, Toyotaro Suzumura, Rikiya Takahashi, Tsuyoshi Ide
Technical Report, IBM Research - Tokyo, 2013


X10-based Massive Parallel Large-scale Traffic Flow Simulation
Toyotaro Suzumura, Sei Kato, Takashi Imamichi, Mikio Takeuchi, Hiroki Kanezashi, Tsuyoshi Ide, Tamiya Onodera
Proceedings of the 2012 ACM SIGPLAN X10 Workshop, pp. 3:1--3:4, ACM

An Exact Strip Packing Algorithm Based on Canonical Forms
Yohei Arahori, Takashi Imamichi, Hiroshi Nagamochi
Computers & Operations Research 39(12), 2991-3011, Elsevier, 2012

X10-based Massive Parallel Large-scale Traffic Flow Simulation (in Japanese)
T Suzumura, T Onodera, T Imamichi, S Kato, T Ide

Nonlinear Optimization to Generate Non-overlapping Random Dot Patterns
Takashi Imamichi, Hidetoshi Numata, Hideyuki Mizuta, \bf Tsuyoshi Id\'e
Proceedings of the Winter Simulation Conference 2011 (WSC 11), pp. 2419-2430, 2012


Multi-sphere Scheme with a General Nonlinear Programming Solver
Takashi Imamichi, Ernesto G. Birgin
IFORS 2011

Efficient branch-and-bound algorithms for weighted MAX-2-SAT
Toshihide Ibaraki, Takashi Imamichi, Yuichi Koga, Hiroshi Nagamochi, Koji Nonobe, Mutsunori Yagiura
Mathematical Programming 127(2), 297--343, Springer, 2011


Modeling Patent Quality: A System for Large-scale Patentability Analysis using Text Mining
Shohei Hido, Shoko Suzuki, Risa Nishiyama, Takashi Imamichi, Rikiya Takahashi, Tetsuya Nasukawa, \bf Tsuyoshi Id\'e, Yusuke Kanehira, Rinju Yohda, Takeshi Ueno, Akira Tajima, Toshiya Watanabe
Journal of Information Processing20, 667-671, 2010

Quantitative Evaluation and Statistical Analysis of Patent Quality using Machine Learning
Shohei Hido, Takashi Imamichi, Shoko Suzuki, Rikiya Takahashi, Yusuke Kanehira, Rinju Yohda, Akira Tajima
The First AAMT/Japio Symposium on Patent Information Processing, 2010


Solving the irregular strip packing problem via guided local search for overlap minimization
Shunji Umetani, Mutsunori Yagiura, Shinji Imahori, Takashi Imamichi, Koji Nonobe, Toshihide Ibaraki
International Transactions in Operational Research 16(6), 661--683, Wiley Online Library, 2009

Exact algorithms for the two-dimensional strip packing problem with and without rotations
Mitsutoshi Kenmochi, Takashi Imamichi, Koji Nonobe, Mutsunori Yagiura, Hiroshi Nagamochi
European Journal of Operational Research 198(1), 73--83, Elsevier, 2009

Removing node overlaps using multi-sphere scheme
Takashi Imamichi, Yohei Arahori, Jaeseong Gim, Seok-Hee Hong, Hiroshi Nagamochi
Graph Drawing, pp. 296--301, 2009

An iterated local search algorithm based on nonlinear programming for the irregular strip packing problem
Takashi Imamichi, Mutsunori Yagiura, Hiroshi Nagamochi
Discrete Optimization 6(4), 345--361, Elsevier, 2009


Performance Analysis of a Collision Detection Algorithm of Spheres Based on Slab Partitioning
Takashi Imamichi, Hiroshi Nagamochi
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 91(9), 2308--2313, 2008

Designing algorithms with multi-sphere scheme
T Imamichi, H Nagamochi
International Conference on Informatics Education and Research for Knowledge-Circulating Society, pp. 125--130, 2008


A multi-sphere scheme for 2D and 3D packing problems
Takashi Imamichi, Hiroshi Nagamochi
Engineering Stochastic Local Search Algorithms. Designing, Implementing and Analyzing Effective Heuristics, 207--211, Springer, 2007