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Di Fu

7 accepted papers

2025

Direct Preference Optimization of Video Large Multimodal Models from Language Model Reward

NAACL 2025long

Preference modeling techniques, such as direct preference optimization (DPO), has shown effective in enhancing the generalization abilities of large language model (LLM). However, in tasks involving video instruction-following, providing informative feedback, especially for open-ended conversations,…

2025

SeedLoRA: A Fusion Approach to Efficient LLM Fine-Tuning

ICML 2025poster

Despite Low-Rank Adaptation (LoRA)'s popularity for fine-tuning large models, it often exhibits a noticeable performance gap compared to full fine-tuning, particularly in complex tasks such as mathematical reasoning and code generation. Motivated by this discrepancy, we propose a novel fusion approa…

Cited by 0SourcePDFScholar
2024

Reward Shaping for Reinforcement Learning with An Assistant Reward Agent

ICML 2024poster

Reward shaping is a promising approach to tackle the sparse-reward challenge of reinforcement learning by reconstructing more informative and dense rewards. This paper introduces a novel dual-agent reward shaping framework, composed of two synergistic agents: a policy agent to learn the optimal beha…

Cited by 5SourcePDFScholar
2023

GeoDRL: A Self-Learning Framework for Geometry Problem Solving using Reinforcement Learning in Deductive Reasoning

ACL 2023findings

Ensuring both interpretability and correctness is a great challenge in automated geometry problem solving (GPS), and the scarcity of labeled data hinders learning mathematical reasoning from samples. Therefore, we present GeoDRL, a self-learning geometry problem solving framework that integrates log…

2018

A Neurorobotic Experiment for Crossmodal Conflict Resolution in Complex Environments

IROS 2018poster

Crossmodal conflict resolution is crucial for robot sensorimotor coupling through the interaction with the environment, yielding swift and robust behaviour also in noisy conditions. In this paper, we propose a neurorobotic experiment in which an iCub robot exhibits human-like responses in a complex…

Cited by 16SourceScholar
2018

Deep Predictive Coding Network with Local Recurrent Processing for Object Recognition

NeurIPS 2018poster

Inspired by "predictive coding" - a theory in neuroscience, we develop a bi-directional and dynamic neural network with local recurrent processing, namely predictive coding network (PCN). Unlike feedforward-only convolutional neural networks, PCN includes both feedback connections, which carry top-d…

Cited by 80SourcePDFScholar