Kevin Fauvel is one of the #DigitAg co-funded PhDs
Kevin defended his thesis on Tuesday 13th October 2020, at 2pm CEST, in room Métivier – Inria Rennes.
Enhancing Performance and Explainability of Multivariate Time Series Machine Learning Methods: Applications for Social Impact in Dairy Resource Monitoring and Earthquake Early Warning
- Start Date: October 2017
- University: Bretagne Loire
- PhD School: MathSTIC Rennes
- Field(s): Machine Learning
- Doctoral Thesis Advisor: Alexandre Termier (Université de Rennes – Inria), Philippe Faverdin (Inrae)
- Co-supervisors : Véronique Masson (Inria)
- Funding: #DigitAg – Inria
- #DigitAg: Co-funded PhD – Axis 5 – Challenge 4
Keywords: Explainable AI, Machine Learning, Multivariate Time Series, Social Impact
Abstract: The prevalent deployment and usage of sensors in a wide range of sectors generate an abundance of multivariate data which has proven to be instrumental for researches, businesses and policies. More specifically, multivariate data which integrates temporal evolution, i.e. Multivariate Time Series (MTS), has received significant interests in recent years, driven by high resolution monitoring applications (e.g. healthcare, mobility, smart farming) and machine learning. However, for many applications, the adoption of machine learning methods cannot rely solely on their prediction performance. For example, the European Union’s General Data Protection Regulation, which became enforceable on 25 May 2018, introduces a right to explanation for all individuals so that they can obtain “meaningful explanations of the logic involved” when automated decision-making has “legal effects” on individuals or similarly “significantly affecting” them.
The current best performing state-of-the-art MTS machine learning methods are “black-box” models, i.e. complicated-to-understand models, which rely on explainability methods providing explanations from any machine learning model to support their predictions (post-hoc model-agnostic). The main line of work in post-hoc model-agnostic explainability methods approximates the decision surface of a model using an explainable surrogate model. However, the explanations from the surrogate models cannot be perfectly faithful with respect to the original model, which is a prerequisite for numerous applications. Faithfulness is critical as it corresponds to the level of trust an end-user can have in the explanations of model predictions, i.e. the level of relatedness of the explanations to what the model actually computes.
This thesis introduces new approaches to enhance both performance and explainability of MTS machine learning methods, and derive insights from the new methods about two real-world applications.
Contact: kvn.fauvel [AT] gmail.com
– K. Fauvel, D. Balouek-Thomert, D. Melgar, P. Silva, A. Simonet, G. Antoniu, A. Costan, V. Masson, M. Parashar, I. Rodero, and A. Termier. 2020. A Distributed Multi-Sensor Machine Learning Approach to Earthquake Early Warning. In Proceedings of the 34th AAAI Conference on Artificial Intelligence – AAAI’20 (https://hal.archives-ouvertes.fr/hal-02373429)
– K. Fauvel, V. Masson, and E. Fromont. 2020. A Performance-Explainability Framework to Benchmark Machine Learning Methods: Application to Multivariate Time Series Classifiers. In Proceedings of the IJCAI-PRICAI 2020 Workshop on Explainable Artificial Intelligence – IJCAI-PRICAI’20 (https://arxiv.org/abs/2005.14501)
–K. Fauvel, T. Lin, V. Masson, E. Fromont, and A. Termier. 2020. XCM: An Explainable Convolutional Neural Network for Multivariate Time Series Classification. ArXiv (https://arxiv.org/abs/2009.04796)
–K. Fauvel, E. Fromont, V. Masson, P. Faverdin, and A. Termier. 2020. XEM: An Explainable Ensemble Method for Multivariate Time Series Classification. ArXiv (https://arxiv.org/abs/2005.03645)
– K. Fauvel, V. Masson, E. Fromont, P. Faverdin, and A. Termier. 2019. Towards Sustainable Dairy Management – A Machine Learning Enhanced Method for Estrus Detection. In Proceedings of the 25th ACM SIGKDD Conference on Knowledge Discovery and Data Mining – KDD’19 (https://hal.inria.fr/hal-02190790/)
– K. Fauvel, V. Masson, P. Faverdin, and A. Termier. 2018. Data Science Techniques for Sustainable Dairy Management. ERCIM News (https://ercim-news.ercim.eu/en113/special/data-science-techniques-for-sustainable-dairy-management)