Hi, I'm |

My name is Zhiyu Chen (陈知雨). Now I am working as an applied scientist at Amazon in Seattle, US. My first name “Zhiyu” comes from an ancient Chinese poem (好雨知时节), which means good rain knows the best time to fall. I received my PhD from Lehigh University at 2022 with Prof. Brian D. Davison. My research interests include data mining, machine learning, natural language processing and information retrieval.

• Wizard of Shopping: Target-Oriented E-commerce Dialogue Generation with Decision Tree Branching.
  X. Li, Z. Chen, J. Choi, N. Vedula, B. Fetahu, O. Rokhlenko, S. Malmasi.
  ACL 2025
• Approximate Vector Set Search: A Bio-Inspired Approach for High-Dimensional Spaces.
  W. Yang, S. Wang, Z. Chen, Y. Sun, Z. Peng.
  ICDE 2025
• Joinable Search Over Multi-Source Spatial Datasets: Overlap, Coverage, and Efficiency.
  Y. Li, S. Wang, Z. Chen, S. Chen, Z. Peng.
  ICDE 2025
• Identifying High Consideration E-Commerce Search Queries.
  Z. Chen, B. Fetahu, J. Choi and S. Malmasi.
  EMNLP 2024 (Industry)
• Unbiased Learning-to-Rank Needs Unconfounded Propensity Estimation.
  D. Luo, L. Zou, Q. Ai, Z. Chen, C. Li, D. Yin and B.D. Davison.
  SIGIR 2024
• Enhancing Low-Resource LLMs Classification with PEFT and Synthetic Data.
  P. Patwa, S. Filice, Z. Chen, G. Castellucci, O. Rokhlenko and S. Malmasi.
  LREC-COLING 2024
• Training-free Optimization of Generative Recommender Systems using Large Language Model Optimizers.
  LK. Şenel, B. Fetahu, D. Yoshida, Z. Chen, G. Castellucci, N. Vedula, J. Choi and S. Malmasi.
  ACL 2024
• InstructPTS: Instruction-Tuning LLMs for Product Title Summarization.
  B. Fetahu, Z. Chen, O. Rokhlenko, S. Malmasi.
  EMNLP 2023 (Industry)
• Multi-Coner V2: A Large Multilingual Dataset for Fine-grained and Noisy Named Entity Recognition.
  B. Fetahu, Z. Chen, S. Kar, O. Rokhlenko, S. Malmasi.
  EMNLP 2023 (Findings)
• Generate-then-Retrieve: Intent-Aware FAQ Retrieval in Product Search.
  Z. Chen, J. Choi, B. Fetahu, O. Rokhlenko, S. Malmasi.
  ACL 2023
• Answering Unanswered Questions through Semantic Reformulations in Spoken QA.
  P. Faustini, Z. Chen, B. Fetahu, O. Rokhlenko, S. Malmasi.
  ACL 2023
• Model-based Unbiased Learning to Rank.
  D. Luo, L. Zou, Q. Ai, Z. Chen, D. Yin, B.D. Davison.
  WSDM 2023
• Reinforced Question Rewriting for Conversational Question Answering.
  Z. Chen, J. Zhao, A. Fang, B. Fetahu, O. Rokhlenko, S. Malmasi.
  EMNLP 2022
• StruBERT: Structure-aware BERT for Table Search and Matching.
  M. Trabelsi, Z. Chen, S. Zhang, J. Heflin, and B. D. Davison.
  WWW 2022
• MGNETS: Multi-Graph Neural Networks for Table Search.
  Z. Chen, M. Trabelsi, J. Heflin, D. Yin, and B. D. Davison. (2021)
  CIKM 2021
• Neural Ranking Models for Document Retrieval.
  M. Trabelsi, Z. Chen, J. Heflin and B.D. Davison. (2021)
  Information Retrieval Journal 2021
• WTR: A Test Collection for Web Table Retrieval.
  Z. Chen, S. Zhang, and B. D. Davison. (2021)
  SIGIR 2021
• A Hybrid Deep Model for Learning to Rank Data Tables.
  M. Trabelsi, Z. Chen, J. Heflin and B.D. Davison. (2020)
  IEEE BigData 2020
• Relational Graph Embeddings for Table Retrieval.
  M. Trabelsi*, Z. Chen*, B. D. Davison, and J. Heflin.
  BigGraphs 2020 (at IEEE BigData)
• Towards Knowledge Acquisition of Metadata on AI Progress.
  Z. Chen*, M. Trabelsi*, B. D. Davison, and J. Heflin. (2020)
  ISWC 2020 (Demo)
• Table Search Using a Deep Contextualized Language Model.
  Z. Chen, M. Trabelsi, J. Heflin, Y. Xu, and B. D. Davison. (2020)
  SIGIR 2020
• Pretrained Generalized Autoregressive Model with Adaptive Probabilistic Label Clusters for Extreme Multi-label Text Classification.
  H. Ye, Z. Chen, D.-H. Wang, and B. D. Davison. (2020)
  ICML 2020
• Leveraging Schema Labels to Enhance Dataset Search.
  Z. Chen, H. Jia, J. Heflin, and B. D. Davison. (2020)
  ECIR 2020
• Generating Schema Labels through Dataset Content Analysis.
  Z. Chen, H. Jia, J. Heflin and B. D. Davison. (2018)
  WWW 2018 (Profiles & Data:Search Workshop) - Best Paper Award

• 2021, ACM SIGIR Student Travel Grant
• 2021, Rossin Professional Development Program Award at Lehigh University
• 2020, ISWC Student Grant
• 2020, ACM SIGIR Student Travel Grant
• 2018, Best Paper Award of International Workshop on Profiles&Data:Search’18
• 2018, ACM SIGIR Student Travel Grant
• 2015, RCEAS Dean’s Fellowship
• 2014, Chinese Government Scholarship from China Scholarship Council
• 2013, First Prize, National Mathematical Contest in Modeling (Jiangsu Division)
• 2012, Honorable Mention for Social Practice
• 2012, Second Prize, 11-th Higher Mathematics Competition of Jiangsu Province
• 2011-2014, Student Scholarship
• 2011-2014, Merit Student