Search Results for author: Xiuzhen Zhang

Found 23 papers, 9 papers with code

DUCK: Rumour Detection on Social Media by Modelling User and Comment Propagation Networks

1 code implementation NAACL 2022 Lin Tian, Xiuzhen Zhang, Jey Han Lau

Social media rumours, a form of misinformation, can mislead the public and cause significant economic and social disruption.

Graph Attention Misinformation +1

Evaluation of Review Summaries via Question-Answering

no code implementations ALTA 2021 Nannan Huang, Xiuzhen Zhang

In this paper, we propose to use the question-answering(QA) approach to evaluate summaries of opinions in reviews.

Question Answering

FairGT: A Fairness-aware Graph Transformer

1 code implementation26 Apr 2024 Renqiang Luo, Huafei Huang, Shuo Yu, Xiuzhen Zhang, Feng Xia

The design of Graph Transformers (GTs) generally neglects considerations for fairness, resulting in biased outcomes against certain sensitive subgroups.

CMA-R:Causal Mediation Analysis for Explaining Rumour Detection

1 code implementation13 Feb 2024 Lin Tian, Xiuzhen Zhang, Jey Han Lau

We apply causal mediation analysis to explain the decision-making process of neural models for rumour detection on Twitter.

Decision Making Rumour Detection

Bias in Opinion Summarisation from Pre-training to Adaptation: A Case Study in Political Bias

no code implementations1 Feb 2024 Nannan Huang, Haytham Fayek, Xiuzhen Zhang

In this study, using political bias as a case study, we first establish a methodology to quantify bias in abstractive models, then trace it from the pre-trained models to the task of summarising social media opinions using different models and adaptation methods.

Harnessing Network Effect for Fake News Mitigation: Selecting Debunkers via Self-Imitation Learning

1 code implementation28 Jan 2024 Xiaofei Xu, Ke Deng, Michael Dann, Xiuzhen Zhang

This study aims to minimize the influence of fake news on social networks by deploying debunkers to propagate true news.

Imitation Learning

Explainable History Distillation by Marked Temporal Point Process

no code implementations13 Nov 2023 Sishun Liu, Ke Deng, Yan Wang, Xiuzhen Zhang

To efficiently solve \acrshort{ehd}, we rewrite the task into a \gls{01ip} and directly estimate the solution to the program by a model called \acrfull{model}.

counterfactual

Utilising a Large Language Model to Annotate Subject Metadata: A Case Study in an Australian National Research Data Catalogue

no code implementations17 Oct 2023 Shiwei Zhang, Mingfang Wu, Xiuzhen Zhang

To the best of our knowledge, we are introducing, for the first time, an in-context learning method that harnesses large language models for automated subject metadata annotation.

In-Context Learning Language Modelling +1

Intensity-free Integral-based Learning of Marked Temporal Point Processes

1 code implementation4 Aug 2023 Sishun Liu, Ke Deng, Xiuzhen Zhang, Yongli Ren

In the marked temporal point processes (MTPP), a core problem is to parameterize the conditional joint PDF (probability distribution function) $p^*(m, t)$ for inter-event time $t$ and mark $m$, conditioned on the history.

Point Processes

Examining Bias in Opinion Summarisation Through the Perspective of Opinion Diversity

no code implementations7 Jun 2023 Nannan Huang, Lin Tian, Haytham Fayek, Xiuzhen Zhang

We found that BART and ChatGPT can better capture diverse opinions presented in the source documents.

MetaTroll: Few-shot Detection of State-Sponsored Trolls with Transformer Adapters

1 code implementation13 Mar 2023 Lin Tian, Xiuzhen Zhang, Jey Han Lau

State-sponsored trolls are the main actors of influence campaigns on social media and automatic troll detection is important to combat misinformation at scale.

Few-Shot Text Classification Meta-Learning +2

Trustworthy Recommender Systems

no code implementations10 Aug 2022 Shoujin Wang, Xiuzhen Zhang, Yan Wang, Huan Liu, Francesco Ricci

However, researchers lack a systematic overview and discussion of the literature in this novel and fast developing field of TRSs.

Recommendation Systems

Sequential/Session-based Recommendations: Challenges, Approaches, Applications and Opportunities

no code implementations22 May 2022 Shoujin Wang, Qi Zhang, Liang Hu, Xiuzhen Zhang, Yan Wang, Charu Aggarwal

In recent years, sequential recommender systems (SRSs) and session-based recommender systems (SBRSs) have emerged as a new paradigm of RSs to capture users' short-term but dynamic preferences for enabling more timely and accurate recommendations.

Session-Based Recommendations

Detecting Singleton Spams in Reviews via Learning Deep Anomalous Temporal Aspect-Sentiment Patterns

1 code implementation2 Jan 2021 Yassien Shaalan, Xiuzhen Zhang, Jeffrey Chan, Mahsa Salehi

Meanwhile, opinion spams spread widely and the detection of spam reviews becomes critically important for ensuring the integrity of the echo system of online reviews.

Feature Engineering

Less is More: Rejecting Unreliable Reviews for Product Question Answering

1 code implementation9 Jul 2020 Shiwei Zhang, Xiuzhen Zhang, Jey Han Lau, Jeffrey Chan, Cecile Paris

In the literature, PQA is formulated as a retrieval problem with the goal to search for the most relevant reviews to answer a given product question.

Community Question Answering Conformal Prediction +1

Sybil-proof Answer Querying Mechanism

no code implementations27 May 2020 Yao Zhang, Xiuzhen Zhang, Dengji Zhao

We study a question answering problem on a social network, where a requester is seeking an answer from the agents on the network.

Computer Science and Game Theory

Red-faced ROUGE: Examining the Suitability of ROUGE for Opinion Summary Evaluation

no code implementations ALTA 2019 Wenyi Tay, Aditya Joshi, Xiuzhen Zhang, Sarvnaz Karimi, Stephen Wan

Opinion summarisation requires to correctly pair two types of semantic information: (1) aspect or opinion target; and (2) polarity of candidate and reference summaries.

Neural Sparse Topical Coding

no code implementations ACL 2018 Min Peng, Qianqian Xie, Yanchun Zhang, Hua Wang, Xiuzhen Zhang, Jimin Huang, Gang Tian

Topic models with sparsity enhancement have been proven to be effective at learning discriminative and coherent latent topics of short texts, which is critical to many scientific and engineering applications.

Language Modelling Topic Models +1

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