1 code implementation • 15 Dec 2021 • Sein Minn, Jill-Jenn Vie, Koh Takeuchi, Hisashi Kashima, Feida Zhu
IKT's prediction of future student performance is made using a Tree-Augmented Naive Bayes Classifier (TAN), therefore its predictions are easier to explain than deep learning-based student models.
1 code implementation • 21 May 2020 • Shunsuke Kanda, Koh Takeuchi, Keisuke Fujii, Yasuo Tabei
To address this problem, we present the trajectory-indexing succinct trit-array trie (tSTAT), which is a scalable method leveraging LSH for trajectory similarity searches.
1 code implementation • 8 Feb 2021 • Koh Takeuchi, Ryo Nishida, Hisashi Kashima, Masaki Onishi
In this paper, we consider the problem of estimating the effects of crowd movement guidance from past data.
1 code implementation • 11 Jun 2021 • Luu Huu Phuc, Koh Takeuchi, Seiji Okajima, Arseny Tolmachev, Tomoyoshi Takebayashi, Koji Maruhashi, Hisashi Kashima
Multi-relational graph is a ubiquitous and important data structure, allowing flexible representation of multiple types of interactions and relations between entities.
1 code implementation • 8 Feb 2023 • Xiaotian Lu, Jiyi Li, Koh Takeuchi, Hisashi Kashima
Crowdsourcing has been used to collect data at scale in numerous fields.
no code implementations • 8 Feb 2018 • Akisato Kimura, Zoubin Ghahramani, Koh Takeuchi, Tomoharu Iwata, Naonori Ueda
In this paper, we propose a simple but effective method for training neural networks with a limited amount of training data.
no code implementations • 22 Mar 2016 • Makoto Yamada, Koh Takeuchi, Tomoharu Iwata, John Shawe-Taylor, Samuel Kaski
We introduce the localized Lasso, which is suited for learning models that are both interpretable and have a high predictive power in problems with high dimensionality $d$ and small sample size $n$.
no code implementations • ICML 2020 • Yasutoshi Ida, Sekitoshi Kanai, Yasuhiro Fujiwara, Tomoharu Iwata, Koh Takeuchi, Hisashi Kashima
This is because coordinate descent iteratively updates all the parameters in the objective until convergence.
no code implementations • 19 Feb 2021 • Naoya Takeishi, Keisuke Fujii, Koh Takeuchi, Yoshinobu Kawahara
Extracting coherent patterns is one of the standard approaches towards understanding spatio-temporal data.
no code implementations • 27 Jun 2021 • Xiaotian Lu, Arseny Tolmachev, Tatsuya Yamamoto, Koh Takeuchi, Seiji Okajima, Tomoyoshi Takebayashi, Koji Maruhashi, Hisashi Kashima
In order to compare various saliency-based XAI methods quantitatively, several approaches for automated evaluation schemes have been proposed; however, there is no guarantee that such automated evaluation metrics correctly evaluate explainability, and a high rating by an automated evaluation scheme does not necessarily mean a high explainability for humans.
no code implementations • 4 Jun 2022 • Keisuke Fujii, Koh Takeuchi, Atsushi Kuribayashi, Naoya Takeishi, Yoshinobu Kawahara, Kazuya Takeda
Evaluation of intervention in a multiagent system, e. g., when humans should intervene in autonomous driving systems and when a player should pass to teammates for a good shot, is challenging in various engineering and scientific fields.
no code implementations • 25 Feb 2023 • Ryosuke Ueda, Koh Takeuchi, Hisashi Kashima
Crowdsourcing has been widely used to efficiently obtain labeled datasets for supervised learning from large numbers of human resources at low cost.
no code implementations • 20 Jul 2023 • Ryosuke Ueda, Koh Takeuchi, Hisashi Kashima
The experimental results suggest that the combination of Soft D&S and data splitting as a fairness option is effective for dense data, whereas weighted majority voting is effective for sparse data.
1 code implementation • 25 Sep 2023 • Xiaofeng Lin, Guoxi Zhang, Xiaotian Lu, Han Bao, Koh Takeuchi, Hisashi Kashima
One popular application of this estimation lies in the prediction of the impact of a treatment (e. g., a promotion) on an outcome (e. g., sales) of a particular unit (e. g., an item), known as the individual treatment effect (ITE).
1 code implementation • The 29th ACM SIGKDD Conference on Knowledge Discovery and Data Mining 2023 • Koh Takeuchi, Ryo Nishida, Hisashi Kashima, Masaki Onishi
To address this problem, we propose a spatial intervention neural network (SINet) that leverages the hierarchical structure of spatial graphs to learn a rich representation of the covariates and the treatments and exploits this representation to predict a time series of treatment outcome.