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• W3136286566 abstract "Many real-world datasets are labeled with natural orders, i.e., ordinal labels. Ordinal regression is a method to predict ordinal labels that finds a wide range of applications in data-rich domains, such as natural, health and social sciences. Most existing ordinal regression approaches work well for independent and identically distributed (IID) instances via formulating a single ordinal regression task. However, for heterogeneous non-IID instances with well-defined local geometric structures, e.g., subpopulation groups, multi-task learning (MTL) provides a promising framework to encode task (subgroup) relatedness, bridge data from all tasks, and simultaneously learn multiple related tasks in efforts to improve generalization performance. Even though MTL methods have been extensively studied, there is barely existing work investigating MTL for heterogeneous data with ordinal labels. We tackle this important problem via sparse and deep multi-task approaches. Specifically, we develop a regularized multi-task ordinal regression (MTOR) model for smaller datasets and a deep neural networks based MTOR model for large-scale datasets. We evaluate the performance using three real-world healthcare datasets with applications to multi-stage disease progression diagnosis. Our experiments indicate that the proposed MTOR models markedly improve the prediction performance comparing with single-task ordinal regression models." @default.
• W3136286566 created "2021-03-29" @default.
• W3136286566 creator A5009256505 @default.
• W3136286566 creator A5029484872 @default.
• W3136286566 date "2021-03-23" @default.
• W3136286566 modified "2023-10-17" @default.
• W3136286566 title "Tackling ordinal regression problem for heterogeneous data: sparse and deep multi-task learning approaches" @default.
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• W3136286566 doi "https://doi.org/10.1007/s10618-021-00746-8" @default.
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