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Author:

Jinwen, L. (Jinwen, L..) | Maozai, T. (Maozai, T..)

Indexed by:

EI Scopus SCIE

Abstract:

Imputing missing values in multivariate spatial–temporal data is important in many fields. Existing low rank tensor learning methods are popular for handling this task but are sensitive to high level of skewness. The aim of this paper is to develop an alternative method with robustness and high imputation accuracy for multivariate spatial–temporal data. In view of the fact that quantile regression is robust to noises and outliers, we propose an imputed quantile vector autoregressive (IQVAR) model. IQVAR can simultaneously impute missing values and estimate parameters of quantile vector autoregressive model. The objective function includes check loss and nuclear norm penalization. We develop an ADMM (Alternating Direction Method of Multipliers) algorithm to solve the resulting optimization problem. Simulation studies and real data analysis are conducted to verify the efficiency of IQVAR. Compared with other approaches, IQVAR is more robust and accurate. © 2024 Wiley Periodicals LLC.

Keyword:

robustness multi-task learning quantile loss tensor completion

Author Community:

  • [ 1 ] [Jinwen L.]College of Statistics and Data Science, Faculty of Science, Beijing University of Technology, Beijing, China
  • [ 2 ] [Maozai T.]School of Statistics, Renmin University of China, Beijing, China
  • [ 3 ] [Maozai T.]School of Mathematics and Data Science, Changji University, Changji, China

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Source :

Statistical Analysis and Data Mining

ISSN: 1932-1864

Year: 2024

Issue: 1

Volume: 17

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 7

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