Search Results for author: Nancy F. Chen

Found 67 papers, 31 papers with code

Singlish Message Paraphrasing: A Joint Task of Creole Translation and Text Normalization

no code implementations COLING 2022 Zhengyuan Liu, Shikang Ni, Ai Ti Aw, Nancy F. Chen

In this work, we introduce a joint paraphrasing task of creole translation and text normalization of Singlish messages, which can shed light on how to process other language varieties and dialects.

Stance Detection Translation

CrossIn: An Efficient Instruction Tuning Approach for Cross-Lingual Knowledge Alignment

no code implementations18 Apr 2024 Geyu Lin, Bin Wang, Zhengyuan Liu, Nancy F. Chen

This performance discrepancy mainly stems from the imbalanced distribution of training data across languages during pre-training and instruction tuning stages.

Resilience of Large Language Models for Noisy Instructions

no code implementations15 Apr 2024 Bin Wang, Chengwei Wei, Zhengyuan Liu, Geyu Lin, Nancy F. Chen

As the rapidly advancing domain of natural language processing (NLP), large language models (LLMs) have emerged as powerful tools for interpreting human commands and generating text across various tasks.

Automatic Speech Recognition Optical Character Recognition +3

Personality-aware Student Simulation for Conversational Intelligent Tutoring Systems

no code implementations10 Apr 2024 Zhengyuan Liu, Stella Xin Yin, Geyu Lin, Nancy F. Chen

Intelligent Tutoring Systems (ITSs) can provide personalized and self-paced learning experience.

Math

Scaffolding Language Learning via Multi-modal Tutoring Systems with Pedagogical Instructions

no code implementations4 Apr 2024 Zhengyuan Liu, Stella Xin Yin, Carolyn Lee, Nancy F. Chen

Intelligent tutoring systems (ITSs) that imitate human tutors and aim to provide immediate and customized instructions or feedback to learners have shown their effectiveness in education.

Granular Change Accuracy: A More Accurate Performance Metric for Dialogue State Tracking

no code implementations17 Mar 2024 Taha Aksu, Nancy F. Chen

Current metrics for evaluating Dialogue State Tracking (DST) systems exhibit three primary limitations.

Benchmarking Dialogue State Tracking

Learning Planning-based Reasoning by Trajectories Collection and Process Reward Synthesizing

2 code implementations1 Feb 2024 Fangkai Jiao, Chengwei Qin, Zhengyuan Liu, Nancy F. Chen, Shafiq Joty

Large Language Models (LLMs) have demonstrated significant potential in handling complex reasoning tasks through step-by-step rationale generation.

Hallucination Logical Reasoning

Picking the Underused Heads: A Network Pruning Perspective of Attention Head Selection for Fusing Dialogue Coreference Information

no code implementations15 Dec 2023 Zhengyuan Liu, Nancy F. Chen

In this work, we investigate the attention head selection and manipulation strategy for feature injection from a network pruning perspective, and conduct a case study on dialogue summarization.

Network Pruning

Prompt Optimization via Adversarial In-Context Learning

no code implementations5 Dec 2023 Xuan Long Do, Yiran Zhao, Hannah Brown, Yuxi Xie, James Xu Zhao, Nancy F. Chen, Kenji Kawaguchi, Michael Qizhe Xie, Junxian He

We propose a new method, Adversarial In-Context Learning (adv-ICL), to optimize prompt for in-context learning (ICL) by employing one LLM as a generator, another as a discriminator, and a third as a prompt modifier.

Arithmetic Reasoning Data-to-Text Generation +2

ChOiRe: Characterizing and Predicting Human Opinions with Chain of Opinion Reasoning

no code implementations14 Nov 2023 Xuan Long Do, Kenji Kawaguchi, Min-Yen Kan, Nancy F. Chen

Aligning language models (LMs) with human opinion is challenging yet vital to enhance their grasp of human values, preferences, and beliefs.

VerityMath: Advancing Mathematical Reasoning by Self-Verification Through Unit Consistency

no code implementations13 Nov 2023 Vernon Toh, Ratish Puduppully, Nancy F. Chen

Large Language Models (LLMs) combined with program-based solving techniques are increasingly demonstrating proficiency in mathematical reasoning.

Math Mathematical Reasoning

Multi-label and Multi-target Sampling of Machine Annotation for Computational Stance Detection

1 code implementation8 Nov 2023 Zhengyuan Liu, Hai Leong Chieu, Nancy F. Chen

Data collection from manual labeling provides domain-specific and task-aligned supervision for data-driven approaches, and a critical mass of well-annotated resources is required to achieve reasonable performance in natural language processing tasks.

Stance Detection

CoAnnotating: Uncertainty-Guided Work Allocation between Human and Large Language Models for Data Annotation

1 code implementation24 Oct 2023 Minzhi Li, Taiwei Shi, Caleb Ziems, Min-Yen Kan, Nancy F. Chen, Zhengyuan Liu, Diyi Yang

Annotated data plays a critical role in Natural Language Processing (NLP) in training models and evaluating their performance.

text annotation

Finite-context Indexing of Restricted Output Space for NLP Models Facing Noisy Input

1 code implementation21 Oct 2023 Minh Nguyen, Nancy F. Chen

NLP models excel on tasks with clean inputs, but are less accurate with noisy inputs.

Instructive Dialogue Summarization with Query Aggregations

1 code implementation17 Oct 2023 Bin Wang, Zhengyuan Liu, Nancy F. Chen

With the advancement of instruction-finetuned language models, we introduce instruction-tuning to dialogues to expand the capability set of dialogue summarization models.

Machine Reading Comprehension Text Summarization

LLM Based Multi-Document Summarization Exploiting Main-Event Biased Monotone Submodular Content Extraction

no code implementations5 Oct 2023 Litton J Kurisinkel, Nancy F. Chen

Multi-document summarization is a challenging task due to its inherent subjective bias, highlighted by the low inter-annotator ROUGE-1 score of 0. 4 among DUC-2004 reference summaries.

Document Summarization Informativeness +3

Prompter: Zero-shot Adaptive Prefixes for Dialogue State Tracking Domain Adaptation

1 code implementation7 Jun 2023 Taha Aksu, Min-Yen Kan, Nancy F. Chen

A challenge in the Dialogue State Tracking (DST) field is adapting models to new domains without using any supervised data, zero-shot domain adaptation.

Dialogue State Tracking Domain Adaptation +1

Multiple output samples per input in a single-output Gaussian process

no code implementations5 Jun 2023 Jeremy H. M. Wong, Huayun Zhang, Nancy F. Chen

The standard Gaussian Process (GP) only considers a single output sample per input in the training set.

Guiding Computational Stance Detection with Expanded Stance Triangle Framework

1 code implementation31 May 2023 Zhengyuan Liu, Yong Keong Yap, Hai Leong Chieu, Nancy F. Chen

Stance detection determines whether the author of a piece of text is in favor of, against, or neutral towards a specified target, and can be used to gain valuable insights into social media.

Stance Detection

Exploring Self-supervised Logic-enhanced Training for Large Language Models

2 code implementations23 May 2023 Fangkai Jiao, Zhiyang Teng, Bosheng Ding, Zhengyuan Liu, Nancy F. Chen, Shafiq Joty

Existing efforts to improve logical reasoning ability of language models have predominantly relied on supervised fine-tuning, hindering generalization to new domains and/or tasks.

In-Context Learning Logical Reasoning

Decomposed Prompting for Machine Translation Between Related Languages using Large Language Models

1 code implementation22 May 2023 Ratish Puduppully, Anoop Kunchukuttan, Raj Dabre, Ai Ti Aw, Nancy F. Chen

This study investigates machine translation between related languages i. e., languages within the same family that share linguistic characteristics such as word order and lexical similarity.

Machine Translation Translation

Adapter-TST: A Parameter Efficient Method for Multiple-Attribute Text Style Transfer

no code implementations10 May 2023 Zhiqiang Hu, Roy Ka-Wei Lee, Nancy F. Chen

Adapting a large language model for multiple-attribute text style transfer via fine-tuning can be challenging due to the significant amount of computational resources and labeled data required for the specific task.

Attribute Language Modelling +4

Modeling What-to-ask and How-to-ask for Answer-unaware Conversational Question Generation

1 code implementation4 May 2023 Xuan Long Do, Bowei Zou, Shafiq Joty, Anh Tai Tran, Liangming Pan, Nancy F. Chen, Ai Ti Aw

In addition, we propose Conv-Distinct, a novel evaluation metric for CQG, to evaluate the diversity of the generated conversation from a context.

Question Generation Question-Generation +1

SNIPER Training: Variable Sparsity Rate Training For Text-To-Speech

no code implementations14 Nov 2022 Perry Lam, Huayun Zhang, Nancy F. Chen, Berrak Sisman, Dorien Herremans

Text-to-speech (TTS) models have achieved remarkable naturalness in recent years, yet like most deep neural models, they have more parameters than necessary.

Are Current Task-oriented Dialogue Systems Able to Satisfy Impolite Users?

no code implementations24 Oct 2022 Zhiqiang Hu, Roy Kaa-Wei Lee, Nancy F. Chen

We hope by releasing the impolite dialogue corpus and establishing the benchmark evaluations, more researchers are encouraged to investigate this new challenging research task.

Data Augmentation Task-Oriented Dialogue Systems

Towards Summary Candidates Fusion

1 code implementation17 Oct 2022 Mathieu Ravaut, Shafiq Joty, Nancy F. Chen

To bypass this limitation, we propose a new paradigm in second-stage abstractive summarization called SummaFusion that fuses several summary candidates to produce a novel abstractive second-stage summary.

Abstractive Text Summarization Re-Ranking

EPIC TTS Models: Empirical Pruning Investigations Characterizing Text-To-Speech Models

no code implementations22 Sep 2022 Perry Lam, Huayun Zhang, Nancy F. Chen, Berrak Sisman

In this work, we seek to answer the question: what are the characteristics of selected sparse techniques on the performance and model complexity?

Speech Synthesis Text-To-Speech Synthesis

CoHS-CQG: Context and History Selection for Conversational Question Generation

1 code implementation COLING 2022 Xuan Long Do, Bowei Zou, Liangming Pan, Nancy F. Chen, Shafiq Joty, Ai Ti Aw

While previous studies mainly focus on how to model the flow and alignment of the conversation, there has been no thorough study to date on which parts of the context and history are necessary for the model.

Question Generation Question-Generation +1

Multi-Document Summarization with Centroid-Based Pretraining

1 code implementation1 Aug 2022 Ratish Puduppully, Parag Jain, Nancy F. Chen, Mark Steedman

In Multi-Document Summarization (MDS), the input can be modeled as a set of documents, and the output is its summary.

Document Summarization Multi-Document Summarization

A Transformer-based Neural Language Model that Synthesizes Brain Activation Maps from Free-Form Text Queries

no code implementations24 Jul 2022 Gia H. Ngo, Minh Nguyen, Nancy F. Chen, Mert R. Sabuncu

In this paper, we present Text2Brain, an easy to use tool for synthesizing brain activation maps from open-ended text queries.

Language Modelling

Multimodal Dialogue State Tracking

1 code implementation NAACL 2022 Hung Le, Nancy F. Chen, Steven C. H. Hoi

Specifically, we introduce a novel dialogue state tracking task to track the information of visual objects that are mentioned in video-grounded dialogues.

Dialogue State Tracking Video Understanding

Learning from Bootstrapping and Stepwise Reinforcement Reward: A Semi-Supervised Framework for Text Style Transfer

1 code implementation Findings (NAACL) 2022 Zhengyuan Liu, Nancy F. Chen

To take advantage of both supervised and unsupervised paradigms and tackle the challenges, in this work, we propose a semi-supervised framework for text style transfer.

Sentence Style Transfer +1

SummaReranker: A Multi-Task Mixture-of-Experts Re-ranking Framework for Abstractive Summarization

1 code implementation ACL 2022 Mathieu Ravaut, Shafiq Joty, Nancy F. Chen

Sequence-to-sequence neural networks have recently achieved great success in abstractive summarization, especially through fine-tuning large pre-trained language models on the downstream dataset.

Abstractive Text Summarization Document Summarization +1

Large-Scale Acoustic Characterization of Singaporean Children's English Pronunciation

no code implementations18 Feb 2022 Yuling Gu, Nancy F. Chen

In tense and lax vowel pairs, we also consistently observe that the distinction is less conspicuous for Singaporean children compared to the other speaker groups.

Progressive Continual Learning for Spoken Keyword Spotting

2 code implementations29 Jan 2022 Yizheng Huang, Nana Hou, Nancy F. Chen

Catastrophic forgetting is a thorny challenge when updating keyword spotting (KWS) models after deployment.

Continual Learning Keyword Spotting

Improving Multi-Party Dialogue Discourse Parsing via Domain Integration

1 code implementation CODI 2021 Zhengyuan Liu, Nancy F. Chen

While multi-party conversations are often less structured than monologues and documents, they are implicitly organized by semantic level correlations across the interactive turns, and dialogue discourse analysis can be applied to predict the dependency structure and relations between the elementary discourse units, and provide feature-rich structural information for downstream tasks.

Discourse Parsing Domain Adaptation +1

DMRST: A Joint Framework for Document-Level Multilingual RST Discourse Segmentation and Parsing

1 code implementation CODI 2021 Zhengyuan Liu, Ke Shi, Nancy F. Chen

While previous work significantly improves the performance of RST discourse parsing, they are not readily applicable to practical use cases: (1) EDU segmentation is not integrated into most existing tree parsing frameworks, thus it is not straightforward to apply such models on newly-coming data.

Discourse Segmentation Segmentation +1

Text2Brain: Synthesis of Brain Activation Maps from Free-form Text Query

2 code implementations28 Sep 2021 Gia H. Ngo, Minh Nguyen, Nancy F. Chen, Mert R. Sabuncu

In this work, we propose Text2Brain, a neural network approach for coordinate-based meta-analysis of neuroimaging studies to synthesize brain activation maps from open-ended text queries.

Controllable Neural Dialogue Summarization with Personal Named Entity Planning

1 code implementation EMNLP 2021 Zhengyuan Liu, Nancy F. Chen

The conditional sequences are modulated to decide what types of information or what perspective to focus on when forming summaries to tackle the under-constrained problem in summarization tasks.

dialogue summary Hallucination

Dynamic Sliding Window for Meeting Summarization

no code implementations31 Aug 2021 Zhengyuan Liu, Nancy F. Chen

In this work, we first analyze the linguistic characteristics of meeting transcripts on a representative corpus, and find that the sentences comprising the summary correlate with the meeting agenda.

Meeting Summarization

Multilingual Speech Evaluation: Case Studies on English, Malay and Tamil

no code implementations8 Jul 2021 Huayun Zhang, Ke Shi, Nancy F. Chen

While speech evaluation on English has been popular, automatic speech scoring on low resource languages remains challenging.

Representation Learning

Coreference-Aware Dialogue Summarization

1 code implementation SIGDIAL (ACL) 2021 Zhengyuan Liu, Ke Shi, Nancy F. Chen

Summarizing conversations via neural approaches has been gaining research traction lately, yet it is still challenging to obtain practical solutions.

Abstractive Dialogue Summarization

$C^3$: Compositional Counterfactual Contrastive Learning for Video-grounded Dialogues

no code implementations16 Jun 2021 Hung Le, Nancy F. Chen, Steven C. H. Hoi

Video-grounded dialogue systems aim to integrate video understanding and dialogue understanding to generate responses that are relevant to both the dialogue and video context.

Contrastive Learning counterfactual +3

VGNMN: Video-grounded Neural Module Network to Video-Grounded Language Tasks

no code implementations16 Apr 2021 Hung Le, Nancy F. Chen, Steven C. H. Hoi

Neural module networks (NMN) have achieved success in image-grounded tasks such as Visual Question Answering (VQA) on synthetic images.

Information Retrieval Question Answering +2

N-Shot Learning for Augmenting Task-Oriented Dialogue State Tracking

no code implementations Findings (ACL) 2022 Taha Aksu, Zhengyuan Liu, Min-Yen Kan, Nancy F. Chen

Augmentation of task-oriented dialogues has followed standard methods used for plain-text such as back-translation, word-level manipulation, and paraphrasing despite its richly annotated structure.

Data Augmentation Dialogue State Tracking +3

Senone-aware Adversarial Multi-task Training for Unsupervised Child to Adult Speech Adaptation

no code implementations23 Feb 2021 Richeng Duan, Nancy F. Chen

Acoustic modeling for child speech is challenging due to the high acoustic variability caused by physiological differences in the vocal tract.

speech-recognition Speech Recognition

VilNMN: A Neural Module Network approach to Video-Grounded Language Tasks

no code implementations1 Jan 2021 Hung Le, Nancy F. Chen, Steven Hoi

Neural module networks (NMN) have achieved success in image-grounded tasks such as question answering (QA) on synthetic images.

Information Retrieval Question Answering +1

An End-to-End Document-Level Neural Discourse Parser Exploiting Multi-Granularity Representations

no code implementations21 Dec 2020 Ke Shi, Zhengyuan Liu, Nancy F. Chen

Document-level discourse parsing, in accordance with the Rhetorical Structure Theory (RST), remains notoriously challenging.

Discourse Parsing Language Modelling

Multilingual Neural RST Discourse Parsing

1 code implementation COLING 2020 Zhengyuan Liu, Ke Shi, Nancy F. Chen

Text discourse parsing plays an important role in understanding information flow and argumentative structure in natural language.

Discourse Parsing Translation

BiST: Bi-directional Spatio-Temporal Reasoning for Video-Grounded Dialogues

1 code implementation EMNLP 2020 Hung Le, Doyen Sahoo, Nancy F. Chen, Steven C. H. Hoi

Video-grounded dialogues are very challenging due to (i) the complexity of videos which contain both spatial and temporal variations, and (ii) the complexity of user utterances which query different segments and/or different objects in videos over multiple dialogue turns.

Conditional Neural Generation using Sub-Aspect Functions for Extractive News Summarization

no code implementations Findings of the Association for Computational Linguistics 2020 Zhengyuan Liu, Ke Shi, Nancy F. Chen

In this paper, we propose a neural framework that can flexibly control summary generation by introducing a set of sub-aspect functions (i. e. importance, diversity, position).

News Summarization Position +1

UniConv: A Unified Conversational Neural Architecture for Multi-domain Task-oriented Dialogues

1 code implementation EMNLP 2020 Hung Le, Doyen Sahoo, Chenghao Liu, Nancy F. Chen, Steven C. H. Hoi

Building an end-to-end conversational agent for multi-domain task-oriented dialogues has been an open challenge for two main reasons.

Dialogue State Tracking

Multimodal Transformer with Pointer Network for the DSTC8 AVSD Challenge

no code implementations25 Feb 2020 Hung Le, Nancy F. Chen

Audio-Visual Scene-Aware Dialog (AVSD) is an extension from Video Question Answering (QA) whereby the dialogue agent is required to generate natural language responses to address user queries and carry on conversations.

Question Answering Video Question Answering

Hierarchical Character Embeddings: Learning Phonological and Semantic Representations in Languages of Logographic Origin using Recursive Neural Networks

1 code implementation20 Dec 2019 Minh Nguyen, Gia H. Ngo, Nancy F. Chen

Using recursive neural network imposes a prior on the mapping from logographs to embeddings since the network must read in the sub-units in logographs according to the order specified by the recursive structures.

Language Modelling

Topic-aware Pointer-Generator Networks for Summarizing Spoken Conversations

no code implementations3 Oct 2019 Zhengyuan Liu, Angela Ng, Sheldon Lee, Ai Ti Aw, Nancy F. Chen

Such linguistic characteristics of dialogue topics make sentence-level extractive summarization approaches used in spoken documents ill-suited for summarizing conversations.

Extractive Summarization Sentence +1

Multimodal Transformer Networks for End-to-End Video-Grounded Dialogue Systems

1 code implementation ACL 2019 Hung Le, Doyen Sahoo, Nancy F. Chen, Steven C. H. Hoi

Developing Video-Grounded Dialogue Systems (VGDS), where a dialogue is conducted based on visual and audio aspects of a given video, is significantly more challenging than traditional image or text-grounded dialogue systems because (1) feature space of videos span across multiple picture frames, making it difficult to obtain semantic information; and (2) a dialogue agent must perceive and process information from different modalities (audio, video, caption, etc.)

Dialogue State Tracking Response Generation

Phonology-Augmented Statistical Framework for Machine Transliteration using Limited Linguistic Resources

no code implementations7 Oct 2018 Gia H. Ngo, Minh Nguyen, Nancy F. Chen

The problem is compounded by the limited linguistic resources available when converting foreign words to transliterated words in the target language.

Transliteration

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