Search Results for author: Koh Takeuchi

Found 15 papers, 7 papers with code

Interpretable Knowledge Tracing: Simple and Efficient Student Modeling with Causal Relations

1 code implementation15 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.

Knowledge Tracing Skill Mastery

Succinct Trit-array Trie for Scalable Trajectory Similarity Search

1 code implementation21 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.

Inter-domain Multi-relational Link Prediction

1 code implementation11 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.

Link Prediction

Localized Lasso for High-Dimensional Regression

no code implementations22 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 $n$.

regression Vocal Bursts Intensity Prediction

Discriminant Dynamic Mode Decomposition for Labeled Spatio-Temporal Data Collections

no code implementations19 Feb 2021 Naoya Takeishi, Keisuke Fujii, Koh Takeuchi, Yoshinobu Kawahara

Extracting coherent patterns is one of the standard approaches towards understanding spatio-temporal data.

Crowdsourcing Evaluation of Saliency-based XAI Methods

no code implementations27 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.

Explainable Artificial Intelligence (XAI)

Estimating counterfactual treatment outcomes over time in complex multiagent scenarios

no code implementations4 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.

Autonomous Driving counterfactual

Mitigating Observation Biases in Crowdsourced Label Aggregation

no code implementations25 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.

Causal Inference

Mitigating Voter Attribute Bias for Fair Opinion Aggregation

no code implementations20 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.

Attribute Decision Making +1

Estimating Treatment Effects Under Heterogeneous Interference

1 code implementation25 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).

Decision Making

Causal Effect Estimation on Hierarchical Spatial Graph Data

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.

Causal Inference Time Series

Cannot find the paper you are looking for? You can Submit a new open access paper.