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FedCostWAvg: A new averaging for better Federated Learning

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arxiv 2111.08649 v1 pith:LGMVA47R submitted 2021-11-16 cs.LG

FedCostWAvg: A new averaging for better Federated Learning

classification cs.LG
keywords federatedlearningaveragingchallengedifferentfedavgmodelspropose
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose a simple new aggregation strategy for federated learning that won the MICCAI Federated Tumor Segmentation Challenge 2021 (FETS), the first ever challenge on Federated Learning in the Machine Learning community. Our method addresses the problem of how to aggregate multiple models that were trained on different data sets. Conceptually, we propose a new way to choose the weights when averaging the different models, thereby extending the current state of the art (FedAvg). Empirical validation demonstrates that our approach reaches a notable improvement in segmentation performance compared to FedAvg.

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