Missing data is a widespread problem in many domains, creating challenges in data analysis and decision making. Traditional techniques for dealing with missing data, such as excluding incomplete records or imputing simple estimates (e.g., mean), are computationally efficient but may introduce bias and disrupt variable relationships, leading to inaccurate analyses. Model-based imputation techniques offer a more robust solution that preserves the variability and relationships in the data, but they demand significantly more computation time, limiting their applicability to small datasets.
This work enables efficient, high-quality, and scalable data imputation within a database system using the widely used MICE method. We adapt this method to exploit computation sharing and a ring abstraction for faster model training. To impute both continuous and categorical values, we develop techniques for in-database learning of stochastic linear regression and Gaussian discriminant analysis models. Our MICE implementations in PostgreSQL and DuckDB outperform alternative MICE implementations and model-based imputation techniques by up to two orders of magnitude in terms of computation time, while maintaining high imputation quality.
Differentiable and Scalable Generative Adversarial Models for Data Imputation
Center for Data Science, Zhejiang University（浙江大学数据科学中心）；Information Hub, The Hong Kong University of Science and Technology（香港科技大学信息枢纽）；College of Computer Science, Zhejiang University（浙江大学计算机科学与技术学院）
MNT-TNN: Spatiotemporal Traffic Data Imputation via Compact Multimode Nonlinear Transform-based Tensor Nuclear Norm
Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences（智能机器研究所，合肥物理科学研究院，中国科学院）；University of Science and Technology of China（中国科学技术大学）
Probabilistic indirect models for undrained shear strength: addressing significant data missing and variability with advanced imputation and machine learning techniques
