{"type":"ScholarlyArticle","title":"Deep Learning for Multivariate Time Series Imputation: A Survey","authors":[{"name":"Jun Wang","slug":"jun-wang","given":"Jun","family":"Wang","affiliation":""},{"name":"Wenjie Du","slug":"wenjie-du","given":"Wenjie","family":"Du","affiliation":""},{"name":"Yiyuan Yang","slug":"yiyuan-yang","given":"Yiyuan","family":"Yang","affiliation":""},{"name":"Linglong Qian","slug":"linglong-qian","given":"Linglong","family":"Qian","affiliation":""},{"name":"Wei Cao","slug":"wei-cao","given":"Wei","family":"Cao","affiliation":""},{"name":"Keli Zhang","slug":"keli-zhang","given":"Keli","family":"Zhang","affiliation":""},{"name":"Wenjia Wang","slug":"wenjia-wang","given":"Wenjia","family":"Wang","affiliation":""},{"name":"Yuxuan Liang","slug":"yuxuan-liang","given":"Yuxuan","family":"Liang","affiliation":""},{"name":"Qingsong Wen","slug":"qingsong-wen","given":"Qingsong","family":"Wen","affiliation":""}],"abstract":"Missing values are ubiquitous in multivariate time series (MTS) data, posing significant challenges for accurate analysis and downstream applications. In recent years, deep learning-based methods have successfully handled missing data by leveraging complex temporal dependencies and learned data distributions. In this survey, we provide a comprehensive summary of deep learning approaches for multivariate time series imputation (MTSI) tasks. We propose a novel taxonomy that categorizes existing methods based on two key perspectives: imputation uncertainty and neural network architecture. Furthermore, we summarize existing MTSI toolkits with a particular emphasis on the PyPOTS Ecosystem, which provides an integrated and standardized foundation for MTSI research. Finally, we discuss key challenges and future research directions, which give insight for further MTSI research. This survey aims to serve as a valuable resource for researchers and practitioners in the field of time series analysis and missing data imputation tasks. A well-maintained MTSI paper and tool list is available at https://github.com/WenjieDu/Awesome_Imputation.","doi":"10.24963/ijcai.2025/1187","url":"https://ijcai.org/proceedings/2025/1187","pdf":"https://ijcai.org/proceedings/2025/1187.pdf","markdown":"https://ijcai.org/proceedings/2025/1187.md","bibtex":"https://ijcai.org/proceedings/2025/bibtex/1187","volume":{"slug":"2025","title":"Proceedings of the Thirty-Fourth International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2025","url":"https://ijcai.org/proceedings/2025/","year":2025,"location":"Montreal, Canada","dates":"16-22 August 2025","editors":"James Kwok","isbn":"978-1-956792-06-5","publisher":"International Joint Conferences on Artificial Intelligence Organization","doi_prefix":"10.24963/ijcai.2025"},"section":"Survey Track","track":"Survey Track","number":1187,"pages":{"first":10696,"last":10704},"keywords":["Machine Learning: ML: Time series and data streams","Machine Learning: ML: Attention models","Data Mining: DM: Mining data streams","Machine Learning: ML: Deep learning architectures"],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}