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Multi-task learning (MTL) has emerged as a successful strategy in industrial-scale recommender systems, offering significant advantages such as capturing diverse users' interests and accurately detecting different behaviors like ``click" or…

Machine Learning · Computer Science 2025-10-14 Yuguang Liu , Yiyun Miao , Luyao Xia

In machine learning, the goal of multi-task learning (MTL) is to optimize multiple objectives together. Recent works, for example, Multiple Gradient Descent Algorithm (MGDA) and its variants, show promising results with dynamically adjusted…

Machine Learning · Computer Science 2026-03-10 Xuxing Chen , Yun He , Jiayi Xu , Minhui Huang , Xiaoyi Liu , Boyang Liu , Fei Tian , Xiaohan Wei , Rong Jin , Sem Park , Bo Long , Xue Feng

A fundamental challenge for multi-task learning is that different tasks may conflict with each other when they are solved jointly, and a cause of this phenomenon is conflicting gradients during optimization. Recent works attempt to mitigate…

Machine Learning · Computer Science 2023-02-23 Guangyuan Shi , Qimai Li , Wenlong Zhang , Jiaxin Chen , Xiao-Ming Wu

Recent works have shown that deep neural networks benefit from multi-task learning by learning a shared representation across several related tasks. However, performance of such systems depend on relative weighting between various losses…

Computer Vision and Pattern Recognition · Computer Science 2021-06-14 Pavan Kumar Anasosalu Vasu , Shreyas Saxena , Oncel Tuzel

Model merging has recently gained attention as an economical and scalable approach to incorporate task-specific weights from various tasks into a unified multi-task model. For example, in Task Arithmetic (TA), adding the fine-tuned weights…

Machine Learning · Computer Science 2025-01-10 Feng Xiong , Runxi Cheng , Wang Chen , Zhanqiu Zhang , Yiwen Guo , Chun Yuan , Ruifeng Xu

Enabling robots to solve multiple manipulation tasks has a wide range of industrial applications. While learning-based approaches enjoy flexibility and generalizability, scaling these approaches to solve such compositional tasks remains a…

Machine Learning · Computer Science 2021-09-17 Michael H. Lim , Andy Zeng , Brian Ichter , Maryam Bandari , Erwin Coumans , Claire Tomlin , Stefan Schaal , Aleksandra Faust

Multi-task post-training of large language models (LLMs) is typically performed by mixing datasets from different tasks and optimizing them jointly. This approach implicitly assumes that all tasks contribute gradients of similar magnitudes;…

Reinforcement Learning (RL) robot controllers usually aggregate many task objectives into one scalar reward. While large-scale proximal policy optimisation (PPO) has enabled impressive results such as robust robot locomotion in the real…

Robotics · Computer Science 2025-09-19 Humphrey Munn , Brendan Tidd , Peter Böhm , Marcus Gallagher , David Howard

Human beings can leverage knowledge from relative tasks to improve learning on a primary task. Similarly, multi-task learning methods suggest using auxiliary tasks to enhance a neural network's performance on a specific primary task.…

Computer Vision and Pattern Recognition · Computer Science 2024-12-30 Yuanze Li , Chun-Mei Feng , Qilong Wang , Guanglei Yang , Wangmeng Zuo

Developing meta-learning algorithms that are un-biased toward a subset of training tasks often requires hand-designed criteria to weight tasks, potentially resulting in sub-optimal solutions. In this paper, we introduce a new principled and…

Machine Learning · Computer Science 2023-01-05 Cuong Nguyen , Thanh-Toan Do , Gustavo Carneiro

In this paper we consider a problem known as multi-task learning, consisting of fitting a set of classifier or regression functions intended for solving different tasks. In our novel formulation, we couple the parameters of these functions,…

Machine Learning · Computer Science 2021-05-28 Juan Cervino , Juan Andres Bazerque , Miguel Calvo-Fullana , Alejandro Ribeiro

In this paper, we propose a harmonized rotational gradient method, termed HRGrad, for simultaneously tackling multiscale time-dependent kinetic problems with varying small parameters. These parameters exhibit asymptotic transitions from…

Machine Learning · Computer Science 2026-04-28 Zhangyong Liang

Distributed machine learning has recently become a critical paradigm for training large models on vast datasets. We examine the stochastic optimization problem for deep learning within synchronous parallel computing environments under…

Machine Learning · Computer Science 2024-11-07 Yoni Choukroun , Shlomi Azoulay , Pavel Kisilev

We study the problem of efficiently estimating policies that simultaneously optimize multiple objectives in reinforcement learning (RL). Given $n$ objectives (or tasks), we seek the optimal partition of these objectives into $k \ll n$…

Machine Learning · Computer Science 2026-02-24 Zhenshuo Zhang , Minxuan Duan , Youran Ye , Hongyang R. Zhang

Multi-task learning can leverage information learned by one task to benefit the training of other tasks. Despite this capacity, naively training all tasks together in one model often degrades performance, and exhaustively searching through…

Machine Learning · Computer Science 2021-10-27 Christopher Fifty , Ehsan Amid , Zhe Zhao , Tianhe Yu , Rohan Anil , Chelsea Finn

Misalignment between model predictions and intended usage can be detrimental for the deployment of computer vision models. The issue is exacerbated when the task involves complex structured outputs, as it becomes harder to design procedures…

Computer Vision and Pattern Recognition · Computer Science 2023-02-17 André Susano Pinto , Alexander Kolesnikov , Yuge Shi , Lucas Beyer , Xiaohua Zhai

Learning an efficient update rule from data that promotes rapid learning of new tasks from the same distribution remains an open problem in meta-learning. Typically, previous works have approached this issue either by attempting to train a…

Machine Learning · Computer Science 2020-02-19 Sebastian Flennerhag , Andrei A. Rusu , Razvan Pascanu , Francesco Visin , Hujun Yin , Raia Hadsell

In multi-task learning (MTL), gradient conflict poses a significant challenge. Effective methods for addressing this problem, including PCGrad, CAGrad, and GradNorm, in their original implementations are computationally demanding, which…

Machine Learning · Computer Science 2026-04-03 Evgeny Alves Limarenko , Anastasiia Studenikina , Svetlana Illarionova , Maxim Sharaev

Multilingual models jointly pretrained on multiple languages have achieved remarkable performance on various multilingual downstream tasks. Moreover, models finetuned on a single monolingual downstream task have shown to generalize to…

Computation and Language · Computer Science 2022-03-01 Seanie Lee , Hae Beom Lee , Juho Lee , Sung Ju Hwang

Multitask learning aims at solving a set of related tasks simultaneously, by exploiting the shared knowledge for improving the performance on individual tasks. Hence, an important aspect of multitask learning is to understand the…

Machine Learning · Computer Science 2019-10-22 Changjian Shui , Mahdieh Abbasi , Louis-Émile Robitaille , Boyu Wang , Christian Gagné