← Search

Hainan Zhang

16 accepted papers

2026

FedSEA-LLaMA: A Secure, Efficient and Adaptive Federated Splitting Framework for Large Language Models

AAAI 2026technical

Private data holds promise for improving LLMs due to its high quality, but its scattered distribution across data silos and the high computational demands of LLMs limit their deployment in federated environments. To address this, the transformer-based federated split models are proposed, which offlo

Cited by 0SourcePDFScholar
2026

Taming Noise-Induced Prototype Degradation for Privacy-Preserving Personalized Federated Fine-Tuning

CVPR 2026

Prototype-based Personalized Federated Learning (ProtoPFL) enables efficient multi-domain adaptation by communicating compact class prototypes, but directly sharing them poses privacy risks. A common defense involves per-example l_2 clipping before prototype computation to bound sensitivity, followe

Cited by 0SourcecodeScholar
2025

Beyond the Surface: A Solution-Aware Retrieval Model for Competition-level Code Generation

EMNLP 2025

In competitive programming task, problem statements are often embedded within elaborate narrative backgrounds, requiring deep understanding of the underlying solutions to successfully complete the tasks. Current code generation models primarily focus on token-level semantic modeling, highly suscepti

2025

Defending Against Sophisticated Poisoning Attacks with RL-based Aggregation in Federated Learning

AAAI 2025technical

Federated learning is susceptible to model poisoning attacks, especially those meticulously crafted for servers. Traditional defense methods mainly focus on updating assessments or robust aggregation against manually crafted myopic attacks. When facing advanced attacks, their defense stability is no…

2025

Detecting Stealthy Backdoor Samples based on Intra-class Distance for Large Language Models

EMNLP 2025

Stealthy data poisoning during fine-tuning can backdoor large language models (LLMs), threatening downstream safety. Existing detectors either use classifier-style probability signals—ill-suited to generation—or rely on rewriting, which can degrade quality and even introduce new triggers. We address

2025

High-Fidelity Polarimetric Implicit 3D Reconstruction with View-Dependent Physical Representation

AAAI 2025technical

Neural implicit methods have made remarkable progress in 3D reconstruction. However, previous methods often assume view-independent properties of target objects, which fails to accurately reconstruct objects with challenging characteristics, such as transparency and high reflectivity. To address thi…

Cited by 0SourcePDFScholar
2025

MaFeRw: Query Rewriting with Multi-Aspect Feedbacks for Retrieval-Augmented Large Language Models

AAAI 2025technical

In a real-world RAG system, the current query often involves spoken ellipses and ambiguous references from dialogue contexts, necessitating query rewriting to better describe user's information needs. However, traditional context-based rewriting has minimal enhancement on downstream generation tasks…

2024

Safely Learning with Private Data: A Federated Learning Framework for Large Language Model

EMNLP 2024main

Private data, being larger and quality-higher than public data, can greatly improve large language models (LLM). However, due to privacy concerns, this data is often dispersed in multiple silos, making its secure utilization for LLM training a challenge. Federated learning (FL) is an ideal solution…

2022

From spoken dialogue to formal summary: An utterance rewriting for dialogue summarization

NAACL 2022long

Due to the dialogue characteristics of unstructured contexts and multi-parties with first-person perspective, many successful text summarization works have failed when dealing with dialogue summarization. In dialogue summarization task, the input dialogue is usually spoken style with ellipsis and co…

2021

Adaptive Bridge between Training and Inference for Dialogue Generation

EMNLP 2021main

Although exposure bias has been widely studied in some NLP tasks, it faces its unique challenges in dialogue response generation, the representative one-to-various generation scenario. In real human dialogue, there are many appropriate responses for the same context, not only with different expressi…

2021

Augmenting Knowledge-grounded Conversations with Sequential Knowledge Transition

NAACL 2021long

Knowledge data are massive and widespread in the real-world, which can serve as good external sources to enrich conversations. However, in knowledge-grounded conversations, current models still lack the fine-grained control over knowledge selection and integration with dialogues, which finally leads…

2021

CoLV: A Collaborative Latent Variable Model for Knowledge-Grounded Dialogue Generation

EMNLP 2021main

Knowledge-grounded dialogue generation has achieved promising performance with the engagement of external knowledge sources. Typical approaches towards this task usually perform relatively independent two sub-tasks, i.e., knowledge selection and knowledge-aware response generation. In this paper, in…

Cited by 26SourcePDFScholar
2021

FCM: A Fine-grained Comparison Model for Multi-turn Dialogue Reasoning

EMNLP 2021finding

Despite the success of neural dialogue systems in achieving high performance on the leader-board, they cannot meet users’ requirements in practice, due to their poor reasoning skills. The underlying reason is that most neural dialogue models only capture the syntactic and semantic information, but f…

2021

Probing Product Description Generation via Posterior Distillation

AAAI 2021technical

In product description generation (PDG), the user-cared aspect is critical for the recommendation system, which can not only improve user's experiences but also obtain more clicks. High-quality customer reviews can be considered as an ideal source to mine user-cared aspects. However, in reality, a l…

2021

Topic-Aware Contrastive Learning for Abstractive Dialogue Summarization

EMNLP 2021finding

Unlike well-structured text, such as news reports and encyclopedia articles, dialogue content often comes from two or more interlocutors, exchanging information with each other. In such a scenario, the topic of a conversation can vary upon progression and the key information for a certain topic is o…

2020

Modeling Topical Relevance for Multi-Turn Dialogue Generation

IJCAI 2020poster

Topic drift is a common phenomenon in multi-turn dialogue. Therefore, an ideal dialogue generation models should be able to capture the topic information of each context, detect the relevant context, and produce appropriate responses accordingly. However, existing models usually use word or sentence…