29 Sep 2021  ·  Golara Javadi, Frederick Tung, Gabriel L. Oliveira ·

Parameter sharing approaches for deep multi-task learning share a common intuition: for a single network to perform multiple prediction tasks, the network needs to support multiple specialized execution paths. However, previous parameter sharing approaches have relied on a static network structure for each task. In this paper, we propose to increase the capacity for a single network to support multiple tasks by radically increasing the space of possible specialized execution paths. DynaShare is a new approach to deep multi-task learning that learns from the training data a hierarchical gating policy consisting of a task-specific policy for coarse layer selection and gating units for individual input instances, which work together to determine the execution path at inference time. Experimental results on standard multi-task learning benchmark datasets demonstrate the potential of the proposed approach.

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