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Guodong Zheng

6 accepted papers

2026

Dissecting Post-Training: Uncovering the Complementary Roles of SFT and RL for Document Parsing

ICML 2026poster

Document parsing, the task of extracting diverse content from PDFs while preserving their structural integrity, has been significantly advanced by Multimodal Large Language Models (MLLMs). These models have achieved remarkable success, largely driven by extensive post-training on massive datasets. T…

Cited by 0SourceScholar
2026

Plasticity Activation via Polar Operator: A Plug-in Method for Balancing Stability and Plasticity

ICML 2026poster

Continual learning (CL) seeks models that acquire new knowledge while avoiding catastrophic forgetting. However, many methods that mitigate forgetting constrain parameter updates and thereby reduce model plasticity. We revisit the singular value spectrum of gradients in representative CL methods and…

Cited by 0SourceScholar
2026

Understanding the Dynamics of Forgetting and Generalization in Continual Learning via the Neural Tangent Kernel

ICLR 2026poster

Continual learning (CL) enables models to acquire new tasks sequentially while retaining previously learned knowledge. However, most theoretical analyses focus on simplified, converged models or restrictive data distributions and therefore fail to capture how forgetting and generalization evolve du…

Cited by 0SourceScholar
2025

Mitigating Object Hallucinations in MLLMs via Multi-Frequency Perturbations

EMNLP 2025

Recently, multimodal large language models (MLLMs) have demonstrated remarkable performance in visual-language tasks. However, the authenticity of the responses generated by MLLMs is often compromised by object hallucinations. We identify that a key cause of these hallucinations is the model’s over-

Cited by 0SourcePDFScholar
2025

RMB: Comprehensively benchmarking reward models in LLM alignment

ICLR 2025poster

Reward models (RMs) guide the alignment of large language models (LLMs), steering them toward behaviors preferred by humans. Evaluating RMs is the key to better aligning LLMs. However, the current evaluation of RMs may not directly correspond to their alignment performance due to the limited distrib…

2025

SPA-VL: A Comprehensive Safety Preference Alignment Dataset for Vision Language Models

CVPR 2025poster

The emergence of Vision Language Models (VLMs) has brought unprecedented advances in understanding multimodal information. The combination of textual and visual semantics in VLMs is highly complex and diverse, making the safety alignment of these models challenging. Furthermore, due to the limited s…