Search Results for author: Leilei Gan

Found 11 papers, 7 papers with code

Detecting and Mitigating Hallucination in Large Vision Language Models via Fine-Grained AI Feedback

no code implementations22 Apr 2024 Wenyi Xiao, Ziwei Huang, Leilei Gan, Wanggui He, Haoyuan Li, Zhelun Yu, Hao Jiang, Fei Wu, Linchao Zhu

The rapidly developing Large Vision Language Models (LVLMs) have shown notable capabilities on a range of multi-modal tasks, but still face the hallucination phenomena where the generated texts do not align with the given contexts, significantly restricting the usages of LVLMs.

Attribute Hallucination +1

Backdoor Attacks on Dense Passage Retrievers for Disseminating Misinformation

1 code implementation21 Feb 2024 Quanyu Long, Yue Deng, Leilei Gan, Wenya Wang, Sinno Jialin Pan

To achieve this, we propose a perilous backdoor attack triggered by grammar errors in dense passage retrieval.

Backdoor Attack Misinformation +2

Defending Against Weight-Poisoning Backdoor Attacks for Parameter-Efficient Fine-Tuning

no code implementations19 Feb 2024 Shuai Zhao, Leilei Gan, Luu Anh Tuan, Jie Fu, Lingjuan Lyu, Meihuizi Jia, Jinming Wen

Motivated by this insight, we developed a Poisoned Sample Identification Module (PSIM) leveraging PEFT, which identifies poisoned samples through confidence, providing robust defense against weight-poisoning backdoor attacks.

Backdoor Attack text-classification +1

LoraRetriever: Input-Aware LoRA Retrieval and Composition for Mixed Tasks in the Wild

no code implementations15 Feb 2024 Ziyu Zhao, Leilei Gan, Guoyin Wang, Wangchunshu Zhou, Hongxia Yang, Kun Kuang, Fei Wu

Low-Rank Adaptation (LoRA) provides an effective yet efficient solution for fine-tuning large language models (LLM).

Retrieval

Exploiting Contrastive Learning and Numerical Evidence for Confusing Legal Judgment Prediction

1 code implementation15 Nov 2022 Leilei Gan, Baokui Li, Kun Kuang, Yating Zhang, Lei Wang, Luu Anh Tuan, Yi Yang, Fei Wu

Given the fact description text of a legal case, legal judgment prediction (LJP) aims to predict the case's charge, law article and penalty term.

Contrastive Learning

Investigating the Robustness of Natural Language Generation from Logical Forms via Counterfactual Samples

2 code implementations16 Oct 2022 Chengyuan Liu, Leilei Gan, Kun Kuang, Fei Wu

To verify this hypothesis, we manually construct a set of counterfactual samples, which modify the original logical forms to generate counterfactual logical forms with rarely co-occurred table headers and logical operators.

counterfactual Logical Reasoning +1

Triggerless Backdoor Attack for NLP Tasks with Clean Labels

2 code implementations NAACL 2022 Leilei Gan, Jiwei Li, Tianwei Zhang, Xiaoya Li, Yuxian Meng, Fei Wu, Yi Yang, Shangwei Guo, Chun Fan

To deal with this issue, in this paper, we propose a new strategy to perform textual backdoor attacks which do not require an external trigger, and the poisoned samples are correctly labeled.

Backdoor Attack Sentence

Dialogue Inspectional Summarization with Factual Inconsistency Awareness

no code implementations5 Nov 2021 Leilei Gan, Yating Zhang, Kun Kuang, Lin Yuan, Shuo Li, Changlong Sun, Xiaozhong Liu, Fei Wu

Dialogue summarization has been extensively studied and applied, where the prior works mainly focused on exploring superior model structures to align the input dialogue and the output summary.

dialogue summary Medical Diagnosis

Dependency Parsing as MRC-based Span-Span Prediction

2 code implementations ACL 2022 Leilei Gan, Yuxian Meng, Kun Kuang, Xiaofei Sun, Chun Fan, Fei Wu, Jiwei Li

The proposed method has the following merits: (1) it addresses the fundamental problem that edges in a dependency tree should be constructed between subtrees; (2) the MRC framework allows the method to retrieve missing spans in the span proposal stage, which leads to higher recall for eligible spans.

Dependency Parsing Machine Reading Comprehension

SemGloVe: Semantic Co-occurrences for GloVe from BERT

3 code implementations30 Dec 2020 Leilei Gan, Zhiyang Teng, Yue Zhang, Linchao Zhu, Fei Wu, Yi Yang

In this paper, we propose SemGloVe, which distills semantic co-occurrences from BERT into static GloVe word embeddings.

Language Modelling Word Embeddings +1

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