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IEICE Trans

Hiroshi FUJIWARA

Best Possible Algorithms for One-Way Trading with Only the Maximum Fluctuation Ratio Available
Hiroshi FUJIWARA Keiji HIRAO Hiroaki YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2024/03/01
Vol. E107-D  No. 3  pp. 278-285
Type of Manuscript:  Special Section PAPER (Special Section on Foundations of Computer Science — Foundations of Computer Science and their New Trends —)
Category: 
Keyword: 
online algorithm, competitive analysis, linear programming, finance, 
 Summary | Full Text:PDF
Data Gathering Method with High Accuracy of Environment Recognition Using Mathematical Optimization in Packet-Level Index Modulation
Ryuji MIYAMOTO Osamu TAKYU Hiroshi FUJIWARA Koichi ADACHI Mai OHTA Takeo FUJII 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2023/12/01
Vol. E106-B  No. 12  pp. 1337-1349
Type of Manuscript:  Special Section PAPER (Special Section on Emerging Communication Technologies in Conjunction with Main Topics of ICETC 2022)
Category: 
Keyword: 
packet-level index modulation (PLIM), mathematical optimization, 
 Summary | Full Text:PDF
Optimal Online Bin Packing Algorithms for Some Cases with Two Item Sizes
Hiroshi FUJIWARA Masaya KAWAGUCHI Daiki TAKIZAWA Hiroaki YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2023/09/01
Vol. E106-A  No. 9  pp. 1100-1110
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: Algorithms and Data Structures
Keyword: 
bin packing problem, online algorithm, competitive analysis, mathematical optimization, 
 Summary | Full Text:PDF
Parallelization on a Minimal Substring Search Algorithm for Regular Expressions
Yosuke OBE Hiroaki YAMAMOTO Hiroshi FUJIWARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2023/05/01
Vol. E106-D  No. 5  pp. 952-958
Type of Manuscript:  PAPER
Category: Fundamentals of Information Systems
Keyword: 
regular expression, pattern matching, parallel algorithm, 
 Summary | Full Text:PDF
Substring Searchable Symmetric Encryption Based on an Improved DAWG
Hiroaki YAMAMOTO Ryosuke ODA Yoshihiro WACHI Hiroshi FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2022/12/01
Vol. E105-A  No. 12  pp. 1578-1590
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
searchable symmetric encryption, string matching, directed acyclic word graph, 
 Summary | Full Text:PDF
Online Removable Knapsack Problem for Integer-Sized Unweighted Items
Hiroshi FUJIWARA Kanaho HANJI Hiroaki YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2022/09/01
Vol. E105-A  No. 9  pp. 1195-1202
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: Algorithms and Data Structures
Keyword: 
online algorithm, knapsack problem, competitive analysis, 
 Summary | Full Text:PDF
The Huffman Tree Problem with Upper-Bounded Linear Functions
Hiroshi FUJIWARA Yuichi SHIRAI Hiroaki YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2022/03/01
Vol. E105-D  No. 3  pp. 474-480
Type of Manuscript:  Special Section PAPER (Special Section on Foundations of Computer Science - New Trends of Theory of Computation and Algorithm -)
Category: 
Keyword: 
algorithm, combinatorial optimization, mathematical optimization, binary tree, Huffman coding, 
 Summary | Full Text:PDF
Overloaded Wireless MIMO Switching for Information Exchanging through Untrusted Relay in Secure Wireless Communication
Arata TAKAHASHI Osamu TAKYU Hiroshi FUJIWARA Takeo FUJII Tomoaki OHTSUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2021/10/01
Vol. E104-B  No. 10  pp. 1249-1259
Type of Manuscript:  Special Section PAPER (Special Section on Dynamic Spectrum Sharing for Future Wireless Systems)
Category: 
Keyword: 
wireless MIMO switching, physical layer security, mathematical optimization, 
 Summary | Full Text:PDF
Analysis of Lower Bounds for Online Bin Packing with Two Item Sizes
Hiroshi FUJIWARA Ken ENDO Hiroaki YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2021/09/01
Vol. E104-A  No. 9  pp. 1127-1133
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: Algorithms and Data Structures
Keyword: 
bin packing problem, online algorithm, competitive analysis, mathematical optimization, 
 Summary | Full Text:PDF
A New Finite Automata Construction Using a Prefix and a Suffix of Regular Expressions
Hiroaki YAMAMOTO Hiroshi FUJIWARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2021/03/01
Vol. E104-D  No. 3  pp. 381-388
Type of Manuscript:  Special Section PAPER (Special Section on Foundations of Computer Science — New Trends of Theory of Computation and Algorithm —)
Category: 
Keyword: 
regular expression, nondeterministic finite automaton, 
 Summary | Full Text:PDF
Asymptotic Approximation Ratios for Certain Classes of Online Bin Packing Algorithms
Hiroshi FUJIWARA Yuta WANIKAWA Hiroaki YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2021/03/01
Vol. E104-D  No. 3  pp. 362-369
Type of Manuscript:  Special Section PAPER (Special Section on Foundations of Computer Science — New Trends of Theory of Computation and Algorithm —)
Category: 
Keyword: 
bin packing problem, online algorithm, competitive analysis, mathematical optimization, 
 Summary | Full Text:PDF
Bounds for the Multislope Ski-Rental Problem
Hiroshi FUJIWARA Kei SHIBUSAWA Kouki YAMAMOTO Hiroaki YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2020/03/01
Vol. E103-D  No. 3  pp. 481-488
Type of Manuscript:  Special Section PAPER (Special Section on Foundations of Computer Science — Frontiers of Theory of Computation and Algorithm —)
Category: 
Keyword: 
online algorithm, competitive analysis, online optimization, ski-rental problems, 
 Summary | Full Text:PDF
Competitive Analysis for the 3-Slope Ski-Rental Problem with the Discount Rate
Hiroshi FUJIWARA Shunsuke SATOU Toshihiro FUJITO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/06/01
Vol. E99-A  No. 6  pp. 1075-1083
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
online algorithm, competitive analysis, online optimization, ski-rental problems, 
 Summary | Full Text:PDF
Online Weight Balancing on the Unit Circle
Hiroshi FUJIWARA Takahiro SEKI Toshihiro FUJITO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/03/01
Vol. E99-D  No. 3  pp. 567-574
Type of Manuscript:  Special Section PAPER (Special Section on Foundations of Computer Science---Developments of the Theory of Algorithms and Computation---)
Category: 
Keyword: 
online algorithm, competitive analysis, computational geometry, online optimization, 
 Summary | Full Text:PDF
Competitive Analysis for the Flat-Rate Problem
Hiroshi FUJIWARA Atsushi MATSUDA Toshihiro FUJITO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/03/01
Vol. E99-D  No. 3  pp. 559-566
Type of Manuscript:  Special Section PAPER (Special Section on Foundations of Computer Science---Developments of the Theory of Algorithms and Computation---)
Category: 
Keyword: 
online algorithm, competitive analysis, online optimization, ski-rental problems, 
 Summary | Full Text:PDF
The Huffman Tree Problem with Unit Step Functions
Hiroshi FUJIWARA Takuya NAKAMURA Toshihiro FUJITO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/06/01
Vol. E98-A  No. 6  pp. 1189-1196
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
combinatorial optimization, polynomial-time algorithm, binary tree, optimal tree, Huffman coding, 
 Summary | Full Text:PDF
Analysis of Lower Bounds for the Multislope Ski-Rental Problem
Hiroshi FUJIWARA Yasuhiro KONNO Toshihiro FUJITO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/06/01
Vol. E97-A  No. 6  pp. 1200-1205
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
online algorithm, competitive analysis, online optimization, ski-rental problems, 
 Summary | Full Text:PDF
Collision Probability in an In-Line Equipment Model under Erlang Distribution
Eishi CHIBA Hiroshi FUJIWARA Yoshiyuki SEKIGUCHI Toshihide IBARAKI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2013/03/01
Vol. E96-D  No. 3  pp. 400-407
Type of Manuscript:  Special Section PAPER (Special Section on Foundations of Computer Science — New Trends in Algorithms and Theory of Computation —)
Category: 
Keyword: 
stochastic model, collision probability, Erlang distribution, closed form, approximation, 
 Summary | Full Text:PDF