Kouichi Hirata

ORCID

Publication Activity (10 Years)

Years Active: 1993-2024
Publications (10 Years): 46

Top Venues

Publications

Naoya Higuchi, Yasunobu Imamura, Vladimir Mic, Takeshi Shinohara, Kouichi Hirata, Tetsuji Kuboyama
Fast Filtering for Similarity Search Using Conjunctive Enumeration of Sketches in Order of Hamming Distance. ICPRAM (2024)
Ukyo Kashino, Syoma Terada, Kouichi Hirata
Detecting Infectious Disease-Causing Bacteria from Gram Stained Smears Images. IIAI-AAI (2023)
Daisuke Abe, Tomoya Miyazaki, Kouichi Hirata
Sufficient Algorithm for Inclusion of Pattern Caterpillar in Text Tree. IIAI-AAI (2023)
Tomoya Miyazaki, Kouichi Hirata
Subcaterpillar Isomorphism Between Caterpillars: Subtree Isomorphism Restricted Text and Pattern Trees to Caterpillars. ICPRAM (2023)
Yuichi Shimaya, Kouichi Hirata
Correlated Mutations of Positions Among Structural Proteins in Delta and Omicron Variants for SARS-CoV-2 Amino Acid Sequences. ICPRAM (2023)
Hitoshi Sugimoto, Ryotaro Funatsu, Kouichi Hirata
Predicting Geckler Classification from Gram Stained Smears Images for Sputum: Image Classification versus Object Detection. IIAI-AAI (2023)
Ryota Nagashima, Uran Yamamoto, Kouichi Hirata
Distance-Based Analysis of Positions in Amino Acid Sequences for Structural Proteins of SARS-CoV-2 Delta and Omicron Variants. IIAI-AAI (2023)
Hitoshi Sugimoto, Kouichi Hirata
Object Detection as Gram Positive Cocci in Gram Stained Smear Images. IIAI-AAI (2022)
Tomoya Miyazaki, Manami Hagihara, Kouichi Hirata
Caterpillar Inclusion: Inclusion Problem for Rooted Labeled Caterpillars. ICPRAM (2022)
Tomoya Miyazaki, Kouichi Hirata
Subcaterpillar Isomorphism: Subtree Isomorphism Restricted Pattern Trees To Caterpillars. FedCSIS (2022)
Kan Yonashiro, Yuichi Shimaya, Kouichi Hirata
Finding Correlated Mutations of Positions among Structural Proteins in SARS-CoV-2 Amino Acid Sequences. IIAI-AAI (2022)
Manami Hagihara, Tomoya Miyazaki, Kouichi Hirata
Segmental Distance between Rooted Labeled Caterpillars. IIAI-AAI (2022)
Ibuki Kawano, Eri Kurumida, Syoma Terada, Kouichi Hirata
Classifying Gram Positive Cocci and Gram Negative Bacilli in Gram Stained Smear Images. IIAI-AAI (2022)
Manami Hagihara, Takuya Yoshino, Kouichi Hirata
Computing the Variations of Edit Distance for Rooted Labaled Caterpillars. ICPRAM (2022)
Tomoya Miyazaki, Kouichi Hirata
Subcaterpillar Isomorphism: Subtree Isomorphism for Rooted Labeled Caterpillars. WCO (2022)
Naoya Higuchi, Yasunobu Imamura, Vladimir Mic, Takeshi Shinohara, Kouichi Hirata, Tetsuji Kuboyama
Nearest-neighbor Search from Large Datasets using Narrow Sketches. ICPRAM (2022)
Kyohei Yoshihara, Kouichi Hirata
Object Detection as Campylobacter Bacteria and Phagocytotic Activity of Leukocytes in Gram Stained Smears Images. ICPRAM (2022)
Kazuki Hashimoto, Ryosuke Iida, Kouichi Hirata, Kimiko Matsuoka, Shigeki Yokoyama
Detecting Geckler Classification from Gram Stained Smears Images for Sputum. ICPRAM (2020)
Nozomi Abe, Takuya Yoshino, Kouichi Hirata
Heavy Caterpillar Distances for Rooted Labeled Unordered Trees. ICPRAM (2020)
Taiga Kawaguchi, Takuya Yoshino, Kouichi Hirata
Path histogram distance and complete subtree histogram distance for rooted labelled caterpillars. J. Inf. Telecommun. 4 (2) (2020)
Ryosuke Iida, Kazuki Hashimoto, Kouichi Hirata, Kimiko Matsuoka, Shigeki Yokoyama
Detection System of Gram Types for Bacteria from Gram Stained Smears Images. ICPRAM (2020)
Naoya Higuchi, Yasunobu Imamura, Vladimir Mic, Takeshi Shinohara, Kouichi Hirata, Tetsuji Kuboyama
Pivot Selection for Narrow Sketches by Optimization Algorithms. SISAP (2020)
Naoya Higuchi, Yasunobu Imamura, Tetsuji Kuboyama, Kouichi Hirata, Takeshi Shinohara
Fast Filtering for Nearest Neighbor Search by Sketch Enumeration Without Using Matching. Australasian Conference on Artificial Intelligence (2019)
Naoya Higuchi, Yasunobu Imamura, Tetsuji Kuboyama, Kouichi Hirata, Takeshi Shinohara
Fast Nearest Neighbor Search with Narrow 16-bit Sketch. ICPRAM (2019)
Mikio Mizukami, Kouichi Hirata, Tetsuji Kuboyama
Bipartite Edge Correlation Clustering: Finding an Edge Biclique Partition from a Bipartite Graph with Minimum Disagreement. ICPRAM (2019)
Sho Shimamura, Kouichi Hirata
Introducing Fluctuation into Increasing Order of Symmetric Uncertainty for Consistency-Based Feature Selection. TAMC (2019)
Yoshiyuki Ukita, Takuya Yoshino, Kouichi Hirata
Alignment for Rooted Labeled Caterpillars. FedCSIS (Position Papers) (2019)
Yasunobu Imamura, Naoya Higuchi, Takeshi Shinohara, Kouichi Hirata, Tetsuji Kuboyama
Annealing by Increasing Resampling in the Unified View of Simulated Annealing. ICPRAM (2019)
Naoya Higuchi, Yasunobu Imamura, Takeshi Shinohara, Kouichi Hirata, Tetsuji Kuboyama
Annealing by Increasing Resampling. ICPRAM (Revised Selected Papers) (2019)
Kohei Muraka, Takuya Yoshino, Kouichi Hirata
Vertical and Horizontal Distances to Approximate Edit Distance for Rooted Labeled Caterpillars. ICPRAM (2019)
Taiga Kawaguchi, Kouichi Hirata
Earth Mover's Distances for Rooted Labaled Unordered Trees based on Tai Mapping Hierarchy. ICPRAM (2018)
Kohei Muraka, Takuya Yoshino, Kouichi Hirata
Computing Edit Distance between Rooted Labeled Caterpillars. FedCSIS (2018)
Takuya Yoshino, Kohei Muraka, Kouichi Hirata
LCA Histogram Distance for Rooted Labeled Caterpillars. KDIR (2018)
Taiga Kawaguchi, Takuya Yoshino, Kouichi Hirata
Earth Mover's Distance Between Rooted Labeled Unordered Trees Formulated from Complete Subtrees. ICPRAM (Revised Selected Papers) (2018)
Naoya Higuchi, Yasunobu Imamura, Tetsuji Kuboyama, Kouichi Hirata, Takeshi Shinohara
Nearest Neighbor Search using Sketches as Quantized Images of Dimension Reduction. ICPRAM (2018)
Taiga Kawaguchi, Takuya Yoshino, Kouichi Hirata
Path Histogram Distance for Rooted Labeled Caterpillars. ACIIDS (1) (2018)
Natsuki Kiyota, Sho Shimamura, Kouichi Hirata
Extracting Mutually Dependent Multisets. DS (2017)
Takuya Yoshino, Kouichi Hirata
Tai Mapping Hierarchy for Rooted Labeled Trees Through Common Subforest. Theory Comput. Syst. 60 (4) (2017)
Kouichi Hirata, Takuya Yoshino, Yuma Ishizaka
Anchored Alignment Distance between Rooted Labeled Unordered Trees. FedCSIS (2017)
Yasunobu Imamura, Naoya Higuchi, Tetsuji Kuboyama, Kouichi Hirata, Takeshi Shinohara
Pivot Selection for Dimension Reduction using Annealing by Increasing Resampling. LWDA (2017)
Sho Shimamura, Kouichi Hirata
Iterative Feature Selection Based on Binary Consistency. IIAI-AAI (2017)
Yasunobu Imamura, Takeshi Shinohara, Kouichi Hirata, Tetsuji Kuboyama
Fast Hilbert Sort Algorithm Without Using Hilbert Indices. SISAP (2016)
Kazuki Nagayama, Kouichi Hirata, Shigeki Yokoyama, Kimiko Matsuoka
Extracting Propagation Patterns from Bacterial Culture Data in Medical Facility. JSAI-isAI Workshops (2015)
Issei Hamada, Takaharu Shimada, Daiki Nakata, Kouichi Hirata, Tetsuji Kuboyama
Classifying Nucleotide Sequences and their Positions of Influenza A Viruses through Several Kernels. ICPRAM (1) (2015)
Yohei Nasu, Naoki Kishikawa, Kei Tashima, Shin Kodama, Yasunobu Imamura, Takeshi Shinohara, Kouichi Hirata, Tetsuji Kuboyama
High Dimensional Similarity Search with Bundled Query Processing on Hilbert R-Tree. ICPRAM (1) (2015)
Takuya Yoshino, Kouichi Hirata
Alignment of Cyclically Ordered Trees. ICPRAM (1) (2015)
Tomohiro Kan, Shoichi Higuchi, Kouichi Hirata
Segmental Mapping and Distance for Rooted Labeled Ordered Trees. Fundam. Informaticae 132 (4) (2014)
Yoshiyuki Yamamoto, Kouichi Hirata, Tetsuji Kuboyama
Tractable and Intractable variations of Unordered Tree Edit Distance. Int. J. Found. Comput. Sci. 25 (3) (2014)
Yuma Ishizaka, Takuya Yoshino, Kouichi Hirata
Anchored Alignment Problem for Rooted Labeled Trees. JSAI-isAI Workshops (2014)
Quming Jin, Masaya Nakashima, Takeshi Shinohara, Kouichi Hirata, Tetsuji Kuboyama
Central Point Selection in Dimension Reduction Projection Simple-Map with Binary Quantization. JSAI-isAI Workshops (2014)
Kouichi Hirata, Tetsuji Kuboyama, Takuya Yoshino
Mapping Kernels Between Rooted Labeled Trees Beyond Ordered Trees. JSAI-isAI Workshops (2014)
Kunihiro Wasa, Kouichi Hirata, Takeaki Uno, Hiroki Arimura
Faster Algorithms for Tree Similarity Based on Compressed Enumeration of Bounded-Sized Ordered Subtrees. SISAP (2013)
Shoichi Higuchi, Tetsuji Kuboyama, Takako Hashimoto, Kouichi Hirata
Exploring social context from buzz marketing site - Community mapping based on tree edit distance -. PerCom Workshops (2013)
Takuya Yoshino, Shoichi Higuchi, Kouichi Hirata
A Dynamic Programming A* Algorithm for Computing Unordered Tree Edit Distance. IIAI-AAI (2013)
Takaharu Shimada, Issei Hamada, Kouichi Hirata, Tetsuji Kuboyama, Kouki Yonezawa, Kimihito Ito
Clustering of Positions in Nucleotide Sequences by Trim Distance. IIAI-AAI (2013)
Kunihiro Wasa, Takeaki Uno, Kouichi Hirata, Hiroki Arimura
Polynomial Delay and Space Discovery of Connected and Acyclic Sub-hypergraphs in a Hypergraph. Discovery Science (2013)
Issei Hamada, Takaharu Shimada, Daiki Nakata, Kouichi Hirata, Tetsuji Kuboyama
Agreement Subtree Mapping Kernel for Phylogenetic Trees. JSAI-isAI Workshops (2013)
Masao Hattori, Keiichi Matsumoto, Noriko Sugimoto, Alireza Ahrary, Kouichi Hirata
Development of Flexible User Need's Investigation System Based on XML Conversions. IIAI-AAI (2013)
Shunsuke Makino, Takaharu Shimada, Kouichi Hirata, Kouki Yonezawa, Kimihito Ito
A Trim Distance between Positions in Nucleotide Sequences. Discovery Science (2012)
Tomohiro Kan, Shoichi Higuchi, Kouichi Hirata
Segmental Mapping and Distance for Rooted Labeled Ordered Trees. ISAAC (2012)
Shunsuke Makino, Takaharu Shimada, Kouichi Hirata, Kouki Yonezawa, Kimihito Ito
A trim distance between positions as packaging signals in H3N2 influenza viruses. SCIS&ISIS (2012)
Takaharu Shimada, Tatsuya Hazemoto, Shunsuke Makino, Kouichi Hirata, Kimihito Ito
Finding correlated mutations among RNA segments in H3N2 influenza viruses. SCIS&ISIS (2012)
Noriko Sugimoto, Kouichi Hirata
Translating XML Documents Through Dyck-Typed Regular Translation Elementary Formal Systems. IIAI-AAI (2012)
Takahiro Hokazono, Tomohiro Kan, Yoshiyuki Yamamoto, Kouichi Hirata
An Isolated-Subtree Inclusion for Unordered Trees. IIAI-AAI (2012)
Yoshiyuki Yamamoto, Kouichi Hirata, Tetsuji Kuboyama
On Computing Tractable Variations of Unordered Tree Edit Distance with Network Algorithms. JSAI-isAI Workshops (2011)
Shoichi Higuchi, Tomohiro Kan, Yoshiyuki Yamamoto, Kouichi Hirata
An A* Algorithm for Computing Edit Distance between Rooted Labeled Unordered Trees. JSAI-isAI Workshops (2011)
Kouichi Hirata, Yoshiyuki Yamamoto, Tetsuji Kuboyama
Improved MAX SNP-Hard Results for Finding an Edit Distance between Unordered Trees. CPM (2011)
Taku Aratsu, Kouichi Hirata, Tetsuji Kuboyama
Approximating Tree Edit Distance through String Edit Distance for Binary Tree Codes. Fundam. Informaticae 101 (3) (2010)
Takashi Katoh, Hiroki Arimura, Kouichi Hirata
-Partite Episodes from Event Sequences. JSAI-isAI Workshops (2009)
Takashi Katoh, Hiroki Arimura, Kouichi Hirata
A Polynomial-Delay Polynomial-Space Algorithm for Extracting Frequent Diamond Episodes from Event Sequences. PAKDD (2009)
Taishin Daigo, Kouichi Hirata
On Generating All Maximal Acyclic Subhypergraphs with Polynomial Delay. SOFSEM (2009)
Kazuya Sata, Kouichi Hirata, Kimihito Ito, Tetsuji Kuboyama
Discovering Networks for Global Propagation of Influenza A (H3N2) Viruses by Clustering. KES (2) (2009)
Taku Aratsu, Kouichi Hirata, Tetsuji Kuboyama
Approximating Tree Edit Distance through String Edit Distance for Binary Tree Codes. SOFSEM (2009)
Akihiro Yamamoto, Kouichi Hirata, Shin-ichi Minato
The Sixth Workshop on Learning with Logics and Logics for Learning (LLLL2009). JSAI-isAI Workshops (2009)
Takashi Katoh, Hiroki Arimura, Kouichi Hirata
Mining Frequent Bipartite Episode from Event Sequences. Discovery Science (2009)
Tetsuji Kuboyama, Kouichi Hirata, Kiyoko F. Aoki-Kinoshita
An Efficient Unordered Tree Kernel and Its Application to Glycan Classification. PAKDD (2008)
Takashi Katoh, Kouichi Hirata
A Simple Characterization on Serially Constructible Episodes. PAKDD (2008)
Taku Aratsu, Kouichi Hirata, Tetsuji Kuboyama
Sibling Distance for Rooted Labeled Trees. PAKDD Workshops (2008)
Arnoldo José Müller Molina, Kouichi Hirata, Takeshi Shinohara
A Tree Distance Function Based on Multi-sets. PAKDD Workshops (2008)
Tetsuji Kuboyama, Kouichi Hirata, Hisashi Kashima, Kiyoko F. Aoki-Kinoshita, Hiroshi Yasuda
A Spectrum Tree Kernel. Inf. Media Technol. 2 (1) (2007)
Akihiro Yamamoto, Kouichi Hirata
The Fifth Workshop on Learning with Logics and Logics for Learning (LLLL2007). JSAI (2007)
Takashi Katoh, Kouichi Hirata, Masateru Harao
Mining Frequent Diamond Episodes from Event Sequences. MDAI (2007)
Kengo Kubo, Keizo Yamada, Kouichi Hirata, Masateru Harao
Efficient schema matching algorithm based on pre-checking. Systems and Computers in Japan 38 (4) (2007)
Eiju Hirowatari, Kouichi Hirata, Tetsuhiro Miyahara, Setsuo Arikawa
Refutability and Reliability for Inductive Inference of Recursive Real-Valued Functions. Inf. Media Technol. 1 (1) (2006)
Takashi Katoh, Kouichi Hirata, Masateru Harao
Mining Sectorial Episodes from Event Sequences. Discovery Science (2006)
Akihiro Yamamoto, Kouichi Hirata, Ken Satoh
The Fourth Workshop on Learning with Logics and Logics for Learning (LLLL2006). JSAI (2006)
Kouichi Hirata, Megumi Kuwabara, Masateru Harao
On Finding Acyclic Subhypergraphs. FCT (2005)
Nobuhito Ohkura, Kouichi Hirata, Tetsuji Kuboyama, Masateru Harao
-Gram Distance for Ordered Unlabeled Trees. Discovery Science (2005)
Kouichi Hirata
Prediction-hardness of acyclic conjunctive queries. Theor. Comput. Sci. 348 (1) (2005)
Shogo Ozaki, Masateru Harao, Kouichi Hirata
Performance Analysis for Construction of a Performance Practice Support System. ICITA (2) (2005)
Kosuke Ono, Masateru Harao, Kouichi Hirata
Multi-Agent Based Modeling and Simulation of Consensus Formations in Arguments. ICITA (1) (2005)
Eiju Hirowatari, Kouichi Hirata, Tetsuhiro Miyahara
Prediction of Recursive Real-Valued Functions from Finite Examples. JSAI Workshops (2005)
Akihiro Yamamoto, Kouichi Hirata
Workshop on Learning with Logics and Logics for Learning (LLLL). JSAI Workshops (2005)
Kosuke Ono, Takashi Hata, Toyofumi Maetani, Masateru Harao, Kouichi Hirata
Development of a Multi-Agent Based Generic Traffic Simulator. JSAI Workshops (2005)
Megumi Kuwabara, Takeshi Ogawa, Kouichi Hirata, Masateru Harao
On Generalization and Subsumption for Ordered Clauses. JSAI Workshops (2005)
Yoshikazu Shima, Kouichi Hirata, Masateru Harao
Extraction of Frequent Few-Overlapped Monotone DNF Formulas with Depth-First Pruning. PAKDD (2005)
Kouichi Hirata, Keizo Yamada, Masateru Harao
Tractable and intractable second-order matching problems. J. Symb. Comput. 37 (5) (2004)
Yoshikazu Shima, Shinji Mitsuishi, Kouichi Hirata, Masateru Harao
Extracting Minimal and Closed Monotone DNF Formulas. Discovery Science (2004)
Kouichi Hirata, Takeshi Ogawa, Masateru Harao
Generalization Algorithms for Second-Order Terms. ILP (2004)
Kouichi Hirata, Ryosuke Nagazumi, Masateru Harao
Extraction of Coverings as Monotone DNF Formulas. Discovery Science (2003)

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Publication Activity (10 Years)

Top Topics

Top Venues

Kouichi Hirata