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Evan Chen

4 accepted papers

2026

Bridging On-Device and Cloud LLMs for Collaborative Reasoning: A Unified Methodology for Local Routing and Post-Training

ICML 2026poster

Device-cloud collaboration holds promise for deploying large language models (LLMs), leveraging lightweight on-device models for efficiency while relying on powerful cloud models for superior reasoning. A central challenge in this setting is determining, for each incoming query, whether it should be…

Cited by 0SourceScholar
2025

Towards Straggler-Resilient Split Federated Learning: An Unbalanced Update Approach

NeurIPS 2025poster

Split Federated Learning (SFL) enables scalable training on edge devices by combining the parallelism of Federated Learning (FL) with the computational offloading of Split Learning (SL). Despite its great success, SFL suffers significantly from the well-known straggler issue in distributed learning…

Cited by 0SourceScholar
2024

Hierarchical Federated Learning with Multi-Timescale Gradient Correction

NeurIPS 2024poster

While traditional federated learning (FL) typically focuses on a star topology where clients are directly connected to a central server, real-world distributed systems often exhibit hierarchical architectures. Hierarchical FL (HFL) has emerged as a promising solution to bridge this gap, leveraging a…

2020

Meta-rPPG: Remote Heart Rate Estimation Using a Transductive Meta-Learner

ECCV 2020poster

Remote heart rate estimation is the measurement of heart rate without any physical contact with the subject and is accomplished using remote photoplethysmography (rPPG) in this work. rPPG signals are usually collected using a video camera with a limitation of being sensitive to multiple contributing…