Identifying Event Sequences Using Hidden Markov Model. - Kei Wakabayashi; Takao Miura (NLDB, 2007)

Lossless re-encoding of JPEG images using block-adaptive intra prediction. - Ichiro Matsuda; Yukio Nomoto; Kei Wakabayashi; Susumu Itoh (EUSIPCO, 2008)

Topics Identification Based on Event Sequence Using Co-occurrence Words. - Kei Wakabayashi; Takao Miura (NLDB, 2008)

Data Stream Prediction Using Incremental Hidden Markov Models. - Kei Wakabayashi; Takao Miura (DaWaK, 2009)

A lossless re-encoding scheme for MPEG-1 video. - Ichiro Matsuda; Kei Wakabayashi; Yu Ikeda; Susumu Itoh (EUSIPCO, 2009)

Topology Estimation of Hierarchical Hidden Markov Models for Language Models. - Kei Wakabayashi; Takao Miura (NLDB, 2010)

Forward-Backward Activation Algorithm for Hierarchical Hidden Markov Models. - Kei Wakabayashi; Takao Miura (NIPS, 2012)

BUTE: bursty users tagging method estimated by time series data. - Shuhei Yamamoto; Kei Wakabayashi; Noriko Kando; Tetsuji Satoh (iiWAS, 2015)

Nonparametric Bayesian Models for Spoken Language Understanding. - Kei Wakabayashi; Johane Takeuchi; Kotaro Funakoshi; Mikio Nakano (EMNLP, 2016)

Who are growth users?: analyzing and predicting intended Twitter user growth. - Shuhei Yamamoto; Kei Wakabayashi; Noriko Kando; Tetsuji Satoh (iiWAS, 2016)

Twitter user tagging method based on burst time series. - Shuhei Yamamoto; Kei Wakabayashi; Noriko Kando; Tetsuji Satoh (Int. J. Web Inf. Syst., 2016)

Automatic Extraction of Discussion based on Sentence Type Estimation. - Yuto Hoshikawa; Kei Wakabayashi (CSCW Companion, 2017)

Scalable Algorithm for Probabilistic Overlapping Community Detection. - Kento Nozawa; Kei Wakabayashi (SWM@WSDM, 2017)

Twitter user growth analysis based on diversities in posting activities. - Shuhei Yamamoto; Kei Wakabayashi; Tetsuji Satoh; Yuri Nozaki; Noriko Kando (Int. J. Web Inf. Syst., 2017)

Extracting time series variation of topic popularity in microblogs. - Satoshi Fukuyama; Kei Wakabayashi (iiWAS, 2018)

Segmentation-based Unsupervised Phrase Detection. - Kei Wakabayashi (iiWAS, 2018)

Encoder-Decoder Neural Networks for Taxonomy Classification. - Makoto Hiramatsu; Kei Wakabayashi (eCOM@SIGIR, 2018)

Named Entity Recognition by Character-Based Word Classification Using a Domain Specific Dictionary. - Makoto Hiramatsu; Kei Wakabayashi; Jun Harashima (CICLing (2), 2019)

Silent HMMs: Generalized Representation of Hidden Semi-Markov Models and Hierarchical HMMs. - Kei Wakabayashi (FSMNLP, 2019)

Searching Behavior Analysis of Online Shopping Based on Information Content of Query Words. - Genkou Ou; Kei Wakabayashi; Tetsuji Satoh (IIAI-AAI, 2019)

Estimation Method of L2 Learners' Second Language Ability by using Features in Conversation. - Xinnan Chen; Muhammad Haseeb U. R. Rehman Khan; Kei Wakabayashi (iiWAS, 2019)

Events Insights Extraction from Twitter Using LDA and Day-Hashtag Pooling. - Muhammad Haseeb U. R. Rehman Khan; Kei Wakabayashi; Satoshi Fukuyama (iiWAS, 2019)

Named entity recognition using point prediction and active learning. - Koga Kobayashi; Kei Wakabayashi (iiWAS, 2019)

Human-in-the-loop Approach towards Dual Process AI Decisions. - Hikaru Uchida; Masaki Matsubara; Kei Wakabayashi; Atsuyuki Morishima (IEEE BigData, 2020)

Batch Prioritization of Data Labeling Tasks for Training Classifiers. - Masanari Kimura; Kei Wakabayashi; Atsuyuki Morishima (HCOMP, 2020)

Traffic-aware Access Control List Reconstruction. - Kei Wakabayashi; Daisuke Kotani; Yasuo Okabe (ICOIN, 2020)

Mitigating Effect of Dictionary Matching Errors in Distantly Supervised Named Entity Recognition. - Koga Kobayashi; Kei Wakabayashi (iiWAS, 2020)

Effect of Semantic Content Generalization on Pointer Generator Network in Text Summarization. - Yixuan Wu; Kei Wakabayashi (iiWAS, 2020)

Quality-aware Dynamic Task Assignment in Human+AI Crowd. - Masaki Kobayashi; Kei Wakabayashi; Atsuyuki Morishima (WWW (Companion Volume), 2020)

Computational Division of Labor with Human and AI Workers. - Atsuyuki Morishima; Masaki Matsubara; Kei Wakabayashi; Nobutaka Suzuki; Hiroyoshi Ito (IEEE Data Eng. Bull., 2020)

Partial Annotation Scheme for Active Learning on Named Entity Recognition Tasks. - Koga Kobayashi; Kei Wakabayashi (J. Data Intell., 2020)

Human+AI Crowd Task Assignment Considering Result Quality Requirements. - Masaki Kobayashi; Kei Wakabayashi; Atsuyuki Morishima (HCOMP, 2021)

Active Learning for Extracting Technical Terms Covering Multiword Phrases. - Fumimaro Odakura; Koga Kobayashi; Kei Wakabayashi (iiWAS, 2021)

Efficient Training Method for Phrase Extraction Models using Natural Language Explanations. - Ryosuke Saito; Koga Kobayashi; Kei Wakabayashi (iiWAS, 2021)

Examining Effect of Label Redundancy for Machine Learning using Crowdsourcing. - Ayame Shimizu; Kei Wakabayashi (iiWAS, 2021)

Segmentation-Based Formulation of Slot Filling Task for Better Generative Modeling. - Kei Wakabayashi; Johane Takeuchi; Mikio Nakano (IWSDS, 2021)

HAEM: Obtaining Higher-Quality Classification Task Results with AI Workers. - Yu Yamashita; Hiroyoshi Ito; Kei Wakabayashi; Masaki Kobayashi; Atsuyuki Morishima (WebSci, 2022)

Effect of Label Redundancy in Crowdsourcing for Training Machine Learning Models. - Ayame Shimizu; Kei Wakabayashi (J. Data Intell., 2022)

Hybrid Crowd-AI Learning for Human-Interpretable Symbolic Rules in Image Classification. - Ayame Shimizu; Kei Wakabayashi; Masaki Matsubara; Hiroyoshi Ito; Atsuyuki Morishima (IIAI-AAI, 2023)

Exploring the Impact of Syntactic Structure Information on Unknown Entity Recognition in Transformer-based Natural Language Understanding. - Rui Yang; Farnoosh Javar; Kei Wakabayashi; Johane Takeuchi (IIAI-AAI, 2023)

Reducing Human Effort in Keyphrase-Based Human-in-the-Loop Topic Models: A Method for Keyphrase Recommendations. - Muhammad Haseeb U. R. Rehman Khan; Kei Wakabayashi (iiWAS, 2023)

Keyphrase-based Refinement Functions for Efficient Improvement on Document-Topic Association in Human-in-the-Loop Topic Models. - Muhammad Haseeb U. R. Rehman Khan; Kei Wakabayashi (J. Inf. Process., 2023)

Multi-target Feature Selection Method for Predicting User-Level Psychological Status from Text. - Danmeng Cai; Kei Wakabayashi; Shaoyu Ye (iiWAS (1), 2024)

Active Utterance Collection Based on Multi-armed Bandits for Natural Language Understanding in Dialog Systems. - Rui Yang; Kei Wakabayashi (iiWAS (2), 2024)

Phrase-Level Topic Modeling Based on Joint Embedding Space of Words, Phrases and Documents. - Zikai Zhou; Kei Wakabayashi; Hiroyoshi Ito (J. Inf. Process., 2024)