Updated on 2026/06/30

写真a

 
XU ZIWEI
 
Organization
School of Engineering Assistant Professor
Title
Assistant Professor
External link

Research Interests

  • Explainable AI

  • Financial AI

  • Machine Learning

  • Causal Inference

  • Knowledge Graph

  • Graph Theory

Research Areas

  • Informatics / Intelligent informatics  / NLP, Deep learning, Relation Extraction, Knowledge Graph, Linked Data, Causal inference, Graph theory

Education

  • Nantes University   Ph.D. (Informatics)

    2017.10 - 2021.6

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    Country: France

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Research History

  • National Institute of Advanced Industrial Science and Technology   Artificial Intelligence Research Center   Postdoc

    2022.6 - 2025.3

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    Country:Japan

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  • National Institute of Informatics   Principles of Informatics Research Division   Research Assistant

    2021.12 - 2022.5

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    Country:Japan

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Professional Memberships

  • The Japanese Society for Artificial Intelligence

    2024.4

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Papers

  • FinCaKG: A Framework to Construct Financial Causality Knowledge Graph from Text Reviewed

    Ziwei XU, Hiroya Takamura, Ryutaro Ichise

    International Journal of Semantic Computing   19 ( 02 )   321 - 340   2025.6

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:World Scientific Pub Co Pte Ltd  

    <jats:p> Causality analysis holds a prominent role in finance, and the presentation of causality could offer valuable insights for risk mitigation and investment decisions. Recent research has extensively investigated the identification of causality from text, yet there is still a significant deficiency in providing a comprehensive causality presentation from those textual discoveries. In this paper, we present an end-to-end framework to automatically construct Financial Causality Knowledge Graph (FinCaKG) from text, which allows us to visualize the captured causality from a holistic perspective. This framework involves three distinct tasks, including causality sentence detection, cause-effect span identification, and causal dependency representation. To examine the adaptability of FinCaKG framework, we generate, compare, and analyze the distinct FinCaKGs created from different corpus. The results show that this framework has the capability to not only capture the confidential causality but also represent them in a highly detailed manner in the resulting knowledge graphs. We perform a comparative study with ConceptNet, revealing the notable contributions of FinCaKGs in terms of domain coverage and the density of its causal knowledge. Furthermore, we implement two case studies to examine the capability of financial role declaration and distinction of ChatGPT and FinCaKGs applications. We found that, compared to ChatGPT, FinCaKGs are able to represent the much clearer and more distinctive logic opinions among diverse financial roles. The related resources will be available in the webpage https://www.ai.iee.e.titech.ac.jp/FinCaKG/ . </jats:p>

    DOI: 10.1142/s1793351x25420073

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  • Unraveling Global-to-Domain Events Influence based on Causal Graph

    Ziwei XU, Ryutaro ICHISE

    人工知能学会全国大会論文集   2025.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (conference, symposium, etc.)  

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  • FinCaKG-Onto: the financial expertise depiction via causality knowledge graph and domain ontology Reviewed

    Ziwei Xu, Ryutaro Ichise

    Applied Intelligence   55 ( 7 )   2025.2

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1007/s10489-025-06247-1

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    Other Link: https://link.springer.com/article/10.1007/s10489-025-06247-1/fulltext.html

  • Causal Inference in Finance: An Expertise-Driven Model for Instrument Variables Identification and Interpretation Reviewed

    Ying Chen, Ziwei Xu, Kotaro Inoue, Ryutaro Ichise

    2024 International Conference on Machine Learning and Applications (ICMLA)   1089 - 1094   2024.12

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    DOI: 10.1109/icmla61862.2024.00165

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  • Exploring Causal Chain Identification: Comprehensive Insights from Text and Knowledge Graphs Reviewed

    Ziwei Xu, Ryutaro Ichise

    Lecture Notes in Computer Science   129 - 146   2024.8

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    Authorship:Lead author   Language:English   Publishing type:Part of collection (book)   Publisher:Springer Nature Switzerland  

    DOI: 10.1007/978-3-031-68323-7_11

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  • Comparing Foundations: Insights into the Construction of Financial Causal Knowledge Graphs with and without Ontology

    Ziwei XU, Ryutaro ICHISE

    人工知能学会全国大会論文集   2024.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (conference, symposium, etc.)  

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  • A Framework to Construct Financial Causality Knowledge Graph from Text Reviewed

    Ziwei Xu, Hiroya Takamura, Ryutaro Ichise

    2024 IEEE 18th International Conference on Semantic Computing (ICSC)   57 - 64   2024.2

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    DOI: 10.1109/icsc59802.2024.00015

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  • Rehearsing Answers to Probable Questions with Perspective-Taking.

    Yung-Yu Shih, Ziwei Xu, Hiroya Takamura, Yun-Nung Chen, Chung-Chi Chen 0001

    CoRR   abs/2409.18678   2024

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.48550/arXiv.2409.18678

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  • FinKG-JP: A Japanese Financial Knowledge Graph

    Natthawut KERTKEIDKACHORN, Rungsiman NARARATWONG, Ziwei XU, Ryutaro ICHISE

    人工知能学会全国大会論文集   2023.5

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    Language:English   Publishing type:Research paper (conference, symposium, etc.)  

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  • FinKG: A Core Financial Knowledge Graph for Financial Analysis Reviewed

    Natthawut Kertkeidkachorn, Rungsiman Nararatwong, Ziwei Xu, Ryutaro Ichise

    2023 IEEE 17th International Conference on Semantic Computing (ICSC)   90 - 93   2023.2

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    DOI: 10.1109/icsc56153.2023.00020

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  • iLab at FinCausal 2022: Enhancing Causality Detection with an External Cause-Effect Knowledge Graph Reviewed

    Ziwei Xu, Rungsiman Nararatwong, Natthawut Kertkeidkachorn, Ryutaro Ichise

    Proceedings of the 4th Financial Narrative Processing Workshop @LREC2022   2022.6

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)  

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  • Core-Concept-Seeded LDA for Ontology Learning Reviewed

    Hao Huang, Mounira Harzallah, Fabrice Guillet, Ziwei Xu

    Procedia Computer Science   192   222 - 231   2021

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.procs.2021.08.023

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  • Towards a Term Clustering Framework for Modular Ontology Learning Reviewed

    Ziwei Xu, Mounira Harzallah, Fabrice Guillet, Ryutaro Ichise

    Communications in Computer and Information Science   178 - 201   2020.6

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    Authorship:Lead author   Language:English   Publishing type:Part of collection (book)   Publisher:Springer International Publishing  

    DOI: 10.1007/978-3-030-49559-6_9

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  • Modular Ontology Learning with Topic Modelling over Core Ontology Reviewed

    Ziwei Xu, Mounira Harzallah, Fabrice Guillet, Ryutaro Ichise

    Procedia Computer Science   159   562 - 571   2019

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.procs.2019.09.211

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  • Comparing of Term Clustering Frameworks for Modular Ontology Learning Reviewed

    Ziwei Xu, Mounira Harzallah, Fabrice Guillet

    Proceedings of the 10th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management   128 - 135   2018

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:SCITEPRESS - Science and Technology Publications  

    DOI: 10.5220/0006960401280135

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Awards

  • JSAI Annual Conference Award

    2024.10   The Japanese Society for Artificial Intelligence   Comparing Foundations: Insights into the Construction of Financial Causal Knowledge Graphs with and without Ontology

    Ziwei XU, Ryutaro Ichise

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  • Top2 winner at FinCausal 2022 shared task

    2022.6   the 13th Language Resources and Evaluation Conference (LREC)   iLab at FinCausal 2022: Enhancing Causality Detection with an External Cause-Effect Knowledge Graph

    Ziwei Xu, Rungsiman Nararatwong, Natthawut Kertkeidkachorn, Ryutaro Ichise

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