Search Results for author: Qiongkai Xu

Found 21 papers, 8 papers with code

Personal Information Leakage Detection in Conversations

1 code implementation EMNLP 2020 Qiongkai Xu, Lizhen Qu, Zeyu Gao, Gholamreza Haffari

In this work, we propose to protect personal information by warning users of detected suspicious sentences generated by conversational assistants.

Language Modelling

G3Detector: General GPT-Generated Text Detector

no code implementations22 May 2023 Haolan Zhan, Xuanli He, Qiongkai Xu, Yuxiang Wu, Pontus Stenetorp

The burgeoning progress in the field of Large Language Models (LLMs) heralds significant benefits due to their unparalleled capacities.

Mitigating Backdoor Poisoning Attacks through the Lens of Spurious Correlation

no code implementations19 May 2023 Xuanli He, Qiongkai Xu, Jun Wang, Benjamin Rubinstein, Trevor Cohn

Modern NLP models are often trained over large untrusted datasets, raising the potential for a malicious adversary to compromise model behaviour.

Training-free Lexical Backdoor Attacks on Language Models

1 code implementation8 Feb 2023 Yujin Huang, Terry Yue Zhuo, Qiongkai Xu, Han Hu, Xingliang Yuan, Chunyang Chen

In this work, we propose Training-Free Lexical Backdoor Attack (TFLexAttack) as the first training-free backdoor attack on language models.

Backdoor Attack Data Poisoning +1

Rethinking Round-Trip Translation for Machine Translation Evaluation

1 code implementation15 Sep 2022 Terry Yue Zhuo, Qiongkai Xu, Xuanli He, Trevor Cohn

Round-trip translation could be served as a clever and straightforward technique to alleviate the requirement of the parallel evaluation corpus.

Machine Translation Translation

Variational Autoencoder with Disentanglement Priors for Low-Resource Task-Specific Natural Language Generation

1 code implementation27 Feb 2022 Zhuang Li, Lizhen Qu, Qiongkai Xu, Tongtong Wu, Tianyang Zhan, Gholamreza Haffari

In this paper, we propose a variational autoencoder with disentanglement priors, VAE-DPRIOR, for task-specific natural language generation with none or a handful of task-specific labeled examples.

Data Augmentation Disentanglement +3

Protecting Intellectual Property of Language Generation APIs with Lexical Watermark

1 code implementation5 Dec 2021 Xuanli He, Qiongkai Xu, Lingjuan Lyu, Fangzhao Wu, Chenguang Wang

Nowadays, due to the breakthrough in natural language generation (NLG), including machine translation, document summarization, image captioning, etc NLG models have been encapsulated in cloud APIs to serve over half a billion people worldwide and process over one hundred billion word generations per day.

Document Summarization Image Captioning +3

Humanly Certifying Superhuman Classifiers

no code implementations16 Sep 2021 Qiongkai Xu, Christian Walder, Chenchen Xu

In this paper, we first raise the challenge of evaluating the performance of both humans and models with respect to an oracle which is unobserved.

Model Extraction and Adversarial Transferability, Your BERT is Vulnerable!

1 code implementation NAACL 2021 Xuanli He, Lingjuan Lyu, Qiongkai Xu, Lichao Sun

Finally, we investigate two defence strategies to protect the victim model and find that unless the performance of the victim model is sacrificed, both model ex-traction and adversarial transferability can effectively compromise the target models

Model extraction text-classification +2

Privacy-Aware Text Rewriting

no code implementations WS 2019 Qiongkai Xu, Lizhen Qu, Chenchen Xu, Ran Cui

Biased decisions made by automatic systems have led to growing concerns in research communities.

Fairness Translation

ALTER: Auxiliary Text Rewriting Tool for Natural Language Generation

1 code implementation IJCNLP 2019 Qiongkai Xu, Chenchen Xu, Lizhen Qu

In this paper, we describe ALTER, an auxiliary text rewriting tool that facilitates the rewriting process for natural language generation tasks, such as paraphrasing, text simplification, fairness-aware text rewriting, and text style transfer.

Fairness Style Transfer +2

Demographic Inference on Twitter using Recursive Neural Networks

no code implementations ACL 2017 Sunghwan Mac Kim, Qiongkai Xu, Lizhen Qu, Stephen Wan, C{\'e}cile Paris

In social media, demographic inference is a critical task in order to gain a better understanding of a cohort and to facilitate interacting with one{'}s audience.

Network Embedding

Collective Vertex Classification Using Recursive Neural Network

no code implementations24 Jan 2017 Qiongkai Xu, Qing Wang, Chenchen Xu, Lizhen Qu

In this paper, we propose a graph-based recursive neural network framework for collective vertex classification.

Classification General Classification

Deep neural networks for learning graph representations

no code implementations Thirtieth AAAI Conference on Artificial Intelligence 2016 Shaosheng Cao, Wei Lu, Qiongkai Xu

Different from other previous research efforts, we adopt a random surfing model to capture graph structural information directly, instead of using the sampling-based method for generating linear sequences proposed by Perozzi et al. (2014).

Denoising Graph Clustering

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