Search Results for author: Wei Emma Zhang

Found 22 papers, 3 papers with code

SWAP: Exploiting Second-Ranked Logits for Adversarial Attacks on Time Series

no code implementations6 Sep 2023 Chang George Dong, Liangwei Nathan Zheng, Weitong Chen, Wei Emma Zhang, Lin Yue

Time series classification (TSC) has emerged as a critical task in various domains, and deep neural models have shown superior performance in TSC tasks.

Time Series Time Series Classification

Learning to Select the Relevant History Turns in Conversational Question Answering

no code implementations4 Aug 2023 Munazza Zaib, Wei Emma Zhang, Quan Z. Sheng, Subhash Sagar, Adnan Mahmood, Yang Zhang

In this paper, we propose a framework, DHS-ConvQA (Dynamic History Selection in Conversational Question Answering), that first generates the context and question entities for all the history turns, which are then pruned on the basis of similarity they share in common with the question at hand.

Binary Classification Conversational Question Answering +1

Keeping the Questions Conversational: Using Structured Representations to Resolve Dependency in Conversational Question Answering

no code implementations14 Apr 2023 Munazza Zaib, Quan Z. Sheng, Wei Emma Zhang, Adnan Mahmood

However, these sequential questions are sometimes left implicit and thus require the resolution of some natural language phenomena such as anaphora and ellipsis.

Question Rewriting

The Exploration of Knowledge-Preserving Prompts for Document Summarisation

no code implementations27 Jan 2023 Chen Chen, Wei Emma Zhang, Alireza Seyed Shakeri, Makhmoor Fiza

Despite the great development of document summarisation techniques nowadays, factual inconsistencies between the generated summaries and the original texts still occur from time to time.

Document Summarization

Detecting Textual Adversarial Examples Based on Distributional Characteristics of Data Representations

1 code implementation RepL4NLP (ACL) 2022 Na Liu, Mark Dras, Wei Emma Zhang

Although deep neural networks have achieved state-of-the-art performance in various machine learning tasks, adversarial examples, constructed by adding small non-random perturbations to correctly classified inputs, successfully fool highly expressive deep classifiers into incorrect predictions.

Sentence

Dependency Structure for News Document Summarization

no code implementations23 Sep 2021 Congbo Ma, Wei Emma Zhang, Hu Wang, Shubham Gupta, Mingyu Guo

In this work, we develop a neural network based model which leverages dependency parsing to capture cross-positional dependencies and grammatical structures.

Dependency Parsing Document Summarization +2

Conversational Question Answering: A Survey

no code implementations2 Jun 2021 Munazza Zaib, Wei Emma Zhang, Quan Z. Sheng, Adnan Mahmood, Yang Zhang

Question answering (QA) systems provide a way of querying the information available in various formats including, but not limited to, unstructured and structured data in natural languages.

Conversational Question Answering

A Review of the Non-Invasive Techniques for Monitoring Different Aspects of Sleep

no code implementations27 Apr 2021 Zawar Hussain, Quan Z. Sheng, Wei Emma Zhang, Jorge Ortiz, Seyedamin Pouriyeh

In this paper, we present a comprehensive survey of the latest research works (2015 and after) conducted in various categories of sleep monitoring including sleep stage classification, sleep posture recognition, sleep disorders detection, and vital signs monitoring.

A Short Survey of Pre-trained Language Models for Conversational AI-A NewAge in NLP

no code implementations22 Apr 2021 Munazza Zaib, Quan Z. Sheng, Wei Emma Zhang

Building a dialogue system that can communicate naturally with humans is a challenging yet interesting problem of agent-based computing.

Decision Making Word Embeddings

Multi-document Summarization via Deep Learning Techniques: A Survey

no code implementations10 Nov 2020 Congbo Ma, Wei Emma Zhang, Mingyu Guo, Hu Wang, Quan Z. Sheng

Multi-document summarization (MDS) is an effective tool for information aggregation that generates an informative and concise summary from a cluster of topic-related documents.

Document Summarization Multi-Document Summarization

Semantic Equivalent Adversarial Data Augmentation for Visual Question Answering

1 code implementation ECCV 2020 Ruixue Tang, Chao Ma, Wei Emma Zhang, Qi Wu, Xiaokang Yang

However, there are few works studying the data augmentation problem for VQA and none of the existing image based augmentation schemes (such as rotation and flipping) can be directly applied to VQA due to its semantic structure -- an $\langle image, question, answer\rangle$ triplet needs to be maintained correctly.

Adversarial Attack Data Augmentation +2

Adversarial Attacks and Detection on Reinforcement Learning-Based Interactive Recommender Systems

no code implementations14 Jun 2020 Yuanjiang Cao, Xiaocong Chen, Lina Yao, Xianzhi Wang, Wei Emma Zhang

Finally, we study the attack strength and frequency of adversarial examples and evaluate our model on standard datasets with multiple crafting methods.

Recommendation Systems reinforcement-learning +1

Deep Conversational Recommender Systems: A New Frontier for Goal-Oriented Dialogue Systems

no code implementations28 Apr 2020 Dai Hoang Tran, Quan Z. Sheng, Wei Emma Zhang, Salma Abdalla Hamad, Munazza Zaib, Nguyen H. Tran, Lina Yao, Nguyen Lu Dang Khoa

In recent years, the emerging topics of recommender systems that take advantage of natural language processing techniques have attracted much attention, and one of their applications is the Conversational Recommender System (CRS).

Collaborative Filtering Goal-Oriented Dialogue Systems +1

Different Approaches for Human Activity Recognition: A Survey

no code implementations11 Jun 2019 Zawar Hussain, Michael Sheng, Wei Emma Zhang

We further divide these areas into ten different sub-topics and present the latest research work in these sub-topics.

Human Activity Recognition

Adversarial Attacks on Deep Learning Models in Natural Language Processing: A Survey

1 code implementation21 Jan 2019 Wei Emma Zhang, Quan Z. Sheng, Ahoud Alhazmi, Chenliang Li

In this article, we review research works that address this difference and generatetextual adversarial examples on DNNs.

Deep Autoencoder for Recommender Systems: Parameter Influence Analysis

no code implementations25 Dec 2018 Dai Hoang Tran, Zawar Hussain, Wei Emma Zhang, Nguyen Lu Dang Khoa, Nguyen H. Tran, Quan Z. Sheng

Specifically, we find that DAE parameters strongly affect the prediction accuracy of the recommender systems, and the effect is transferable to similar datasets in a larger size.

Recommendation Systems

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