Hao Sun

W-Operator and Differential Equation for 3-Hurwitz Number

2016 · arXiv (Cornell University)

We consider a new type of Hurwitz number, the number of ordered transitive factorizations of an arbitrary permutation into d-cycles. In this paper, we focus on the special case d = 3. The minimal number …

On the Safety of Conversational Models: Taxonomy, Dataset, and Benchmark

2022 · Findings of the Association for Computational Linguistics: ACL 2022

Dialogue safety problems severely limit the real-world deployment of neural conversational models and have attracted great research interests recently. However, dialogue safety problems remain under-defined and the corresponding dataset is scarce. We propose a taxonomy …

Micro-expression Detection based on Action Units and Multi-region Feature Fusion

2022

Recently, micro-expression detection has attracted much attention, since micro-expression has potential lie detection applications. In this paper, a micro-expression detection algorithm based on action units (AUs) and multi-region feature fusion is proposed. First, the regions …

COLD: A Benchmark for Chinese Offensive Language Detection

2022 · arXiv (Cornell University)

Offensive language detection is increasingly crucial for maintaining a civilized social media platform and deploying pre-trained language models. However, this task in Chinese is still under exploration due to the scarcity of reliable datasets. To …

Geometric Disentangled Collaborative Filtering

2022 · Proceedings of the 45th International ACM SIGIR Conference on Research and Development in Information Retrieval

Learning informative representations of users and items from the historical interactions is crucial to collaborative filtering (CF). Existing CF approaches usually model interactions solely within the Euclidean space. However, the sophisticated user-item interactions inherently present …

Meta Proximal Policy Optimization for Cooperative Multi-Agent Continuous Control

2022 · 2022 International Joint Conference on Neural Networks (IJCNN)

In this paper we propose Multi-Agent Proxy Proximal Policy Optimization (MA3PO), a novel multi-agent deep reinforcement learning algorithm that tackles the challenge of cooperative continuous multi-agent control. Our method is driven by the observation that …

Query-Dependent Prompt Evaluation and Optimization with Offline Inverse RL

2023 · arXiv (Cornell University)

In this study, we aim to enhance the arithmetic reasoning ability of Large Language Models (LLMs) through zero-shot prompt optimization. We identify a previously overlooked objective of query dependency in such optimization and elucidate two …

MTL-LoRA: Low-Rank Adaptation for Multi-Task Learning

2024 · arXiv (Cornell University)

Parameter-efficient fine-tuning (PEFT) has been widely employed for domain adaptation, with LoRA being one of the most prominent methods due to its simplicity and effectiveness. However, in multi-task learning (MTL) scenarios, LoRA tends to obscure …

Interest-Aware Social Bot Detection with Contrastive Hard Sample Mining

2024

Social bots frequently engage in malicious activities like spreading misinformation and phishing on major social media platforms, significantly impacting the fairness and security of these platforms. Therefore, detecting social bots has become a very critical …