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Zhengbo Wang

7 accepted papers

2026

Breaking the Echo Chamber: A Dynamic Ensemble Pruning Perspective on MoE

ICML 2026poster

We introduce Mahalanobis-Pruned Mixture-of-Experts (MP-MoE), a novel routing framework that approaches expert selection from the perspective of ensemble pruning. Existing Mixture-of-Experts (MoE) routing strategies often suffer from representation collapse due to greedy top-k selection mechanisms or…

Cited by 0SourceScholar
2026

CE-Nav: Flow-Guided Reinforcement Refinement for Cross-Embodiment Local Navigation

ICLR 2026poster

Generalizing local navigation policies across diverse robot morphologies is a critical challenge. Progress is often hindered by the need for costly and embodiment-specific data, the tight coupling of planning and control, and the "disastrous averaging" problem where deterministic models fail to capt…

Cited by 0SourcecodeScholar
2026

Taming Momentum: Rethinking Optimizer States Through Low-Rank Approximation

ICLR 2026oral

Modern optimizers like Adam and Muon are central to training large language models, but their reliance on first- and second-order momenta introduces significant memory overhead, which constrains scalability and computational efficiency. In this work, we re-frame the exponential moving average (EMA)…

Cited by 0SourceScholar
2025

LoRA-Pro: Are Low-Rank Adapters Properly Optimized?

ICLR 2025spotlight

Low-rank adaptation, also known as LoRA, has emerged as a prominent method for parameter-efficient fine-tuning of foundation models. Despite its computational efficiency, LoRA still yields inferior performance compared to full fine-tuning. In this paper, we first uncover a fundamental connection bet…

2024

A Hard-to-Beat Baseline for Training-free CLIP-based Adaptation

ICLR 2024poster

Contrastive Language-Image Pretraining (CLIP) has gained popularity for its remarkable zero-shot capacity. Recent research has focused on developing efficient fine-tuning methods, such as prompt learning and adapter, to enhance CLIP's performance in downstream tasks. However, these methods still req…

2024

Connecting the Dots: Collaborative Fine-tuning for Black-Box Vision-Language Models

ICML 2024poster

With the emergence of pretrained vision-language models (VLMs), considerable efforts have been devoted to fine-tuning them for downstream tasks. Despite the progress made in designing efficient fine-tuning methods, such methods require access to the model's parameters, which can be challenging as mo…

2024

Realistic Unsupervised CLIP Fine-tuning with Universal Entropy Optimization

ICML 2024spotlight

The emergence of vision-language models, such as CLIP, has spurred a significant research effort towards their application for downstream supervised learning tasks. Although some previous studies have explored the unsupervised fine-tuning of CLIP, they often rely on prior knowledge in the form of cl…