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Yufan Guo

4 accepted papers

2026

Rethinking Time-Series Imputation as Conditional Inference along Temporal Evolution

ICML 2026poster

Real-world time-series data often suffer from missing observations, hindering long-range temporal modeling. However, most existing imputation methods formulate imputation as conditional reconstruction over limited context, which restricts temporal information propagation and fails to explicitly mode…

Cited by 0SourceScholar
2026

SFT Doesn’t Always Hurt General Capabilities: Revisiting Domain-Specific Fine-Tuning in LLMs

ICLR 2026poster

Supervised Fine-Tuning (SFT) on domain-specific datasets is a common approach to adapt Large Language Models (LLMs) to specialized tasks but is often believed to degrade their general capabilities. In this work, we revisit this trade-off and present both empirical and theoretical insights. First, we…

Cited by 0SourceScholar
2026

Shop-R1: Rewarding LLMs to Simulate Human Behavior in Online Shopping via Reinforcement Learning

ICLR 2026poster

Large Language Models (LLMs) have recently demonstrated strong potential in generating ‘believable human-like’ behavior in web environments. Prior work has explored augmenting training data with LLM-synthesized rationales and applying supervised fine-tuning (SFT) to enhance reasoning ability, which…

Cited by 0SourcecodeScholar
2021

When and Why a Model Fails? A Human-in-the-loop Error Detection Framework for Sentiment Analysis

NAACL 2021industry

Although deep neural networks have been widely employed and proven effective in sentiment analysis tasks, it remains challenging for model developers to assess their models for erroneous predictions that might exist prior to deployment. Once deployed, emergent errors can be hard to identify in predi…

Cited by 14SourcePDFScholar