Zhu Zhang


2021

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RADDLE: An Evaluation Benchmark and Analysis Platform for Robust Task-oriented Dialog Systems
Baolin Peng | Chunyuan Li | Zhu Zhang | Chenguang Zhu | Jinchao Li | Jianfeng Gao
Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers)

For task-oriented dialog systems to be maximally useful, it must be able to process conversations in a way that is (1) generalizable with a small number of training examples for new task domains, and (2) robust to user input in various styles, modalities, or domains. In pursuit of these goals, we introduce the RADDLE benchmark, a collection of corpora and tools for evaluating the performance of models across a diverse set of domains. By including tasks with limited training data, RADDLE is designed to favor and encourage models with a strong generalization ability. RADDLE also includes a diagnostic checklist that facilitates detailed robustness analysis in aspects such as language variations, speech errors, unseen entities, and out-of-domain utterances. We evaluate recent state-of-the-art systems based on pre-training and fine-tuning, and find that grounded pre-training on heterogeneous dialog corpora performs better than training a separate model per domain. Adversarial training is also proposed to improve model robustness against noisy inputs. Overall, existing models are less than satisfactory in robustness evaluation, which suggests opportunities for future improvement.

2019

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Proceedings of the Second Workshop on Economics and Natural Language Processing
Udo Hahn | Véronique Hoste | Zhu Zhang
Proceedings of the Second Workshop on Economics and Natural Language Processing

2018

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To Attend or not to Attend: A Case Study on Syntactic Structures for Semantic Relatedness
Amulya Gupta | Zhu Zhang
Proceedings of the 56th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)

With the recent success of Recurrent Neural Networks (RNNs) in Machine Translation (MT), attention mechanisms have become increasingly popular. The purpose of this paper is two-fold; firstly, we propose a novel attention model on Tree Long Short-Term Memory Networks (Tree-LSTMs), a tree-structured generalization of standard LSTM. Secondly, we study the interaction between attention and syntactic structures, by experimenting with three LSTM variants: bidirectional-LSTMs, Constituency Tree-LSTMs, and Dependency Tree-LSTMs. Our models are evaluated on two semantic relatedness tasks: semantic relatedness scoring for sentence pairs (SemEval 2012, Task 6 and SemEval 2014, Task 1) and paraphrase detection for question pairs (Quora, 2017).

2005

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Mining Inter-Entity Semantic Relations Using Improved Transductive Learning
Zhu Zhang
Second International Joint Conference on Natural Language Processing: Full Papers

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Tense Tagging for Verbs in Cross-Lingual Context: A Case Study
Yang Ye | Zhu Zhang
Second International Joint Conference on Natural Language Processing: Full Papers

2004

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CST Bank: A Corpus for the Study of Cross-document Structural Relationships
Dragomir Radev | Jahna Otterbacher | Zhu Zhang
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)

Clusters of multiple news stories related to the same topic exhibit a number of interesting properties. For example, when documents have been published at various points in time or by different authors or news agencies, one finds many instances of paraphrasing, information overlap and even contradiction. The current paper presents the Cross-document Structure Theory (CST) Bank, a collection of multi-document clusters in which pairs of sentences from different documents have been annotated for cross-document structure theory relationships. We will describe how we built the corpus, including our method for reducing the number of sentence pairs to be annotated by our hired judges, using lexical similarity measures. Finally, we will describe how CST and the CST Bank can be applied to different research areas such as multi-document summarization.

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MEAD - A Platform for Multidocument Multilingual Text Summarization
Dragomir Radev | Timothy Allison | Sasha Blair-Goldensohn | John Blitzer | Arda Çelebi | Stanko Dimitrov | Elliott Drabek | Ali Hakim | Wai Lam | Danyu Liu | Jahna Otterbacher | Hong Qi | Horacio Saggion | Simone Teufel | Michael Topper | Adam Winkel | Zhu Zhang
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)

2002

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Extraposition: A Case Study in German Sentence Realization
Michael Gamon | Eric Ringger | Zhu Zhang | Robert Moore | Simon Corston-Oliver
COLING 2002: The 19th International Conference on Computational Linguistics

2001

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NewsInEssence: A System For Domain-Independent, Real-Time News Clustering and Multi-Document Summarization
Dragomir R. Radev | Sasha Blair-Goldensohn | Zhu Zhang | Revathi Sundara Raghavan
Proceedings of the First International Conference on Human Language Technology Research