Piji Li (李丕绩)

Professor
College of Computer Science and Technology,
Nanjing University of Aeronautics and Astronautics,
Room 109B, D12-A Building, Jiangjun Rd. Campus
Email: lipiji.pz AT gmail.com, [Google Scholar], [Github], [Weibo]

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Biography

I am a professor in the College of Computer Science and Technology at Nanjing University of Aeronautics and Astronautics and I lead the NUAA NLP Group. Previously, I was a senior researcher at Tencent AI Lab. I received my Ph.D. degree from the Department of Systems Engineering and Engineering Management, The Chinese University of Hong Kong in 2018, under the supervision of Prof. Wai Lam. Before joining CUHK, I was a full-time R&D Engineer at Baidu Inc. and Wumii Inc. I received my master and bachelor degree from School of Computer Science and Technology in Shandong University from 2005 to 2012, under the supervision of Prof. Jun Ma.

Research Interests:

• Natural Language Processing: Pretrained Models, Summarization, Generation, Dialogue Systems, Grammatical Error Correction;
• Neural Symbolic Computing: Representation Learning, Reasoning;
• Multimodal AI: Language-Vision Pretrained Models, Visual Dialogue & Commonsense Reasoning;

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News

• May 2025: Three papers got accepted to ACL2025 (1 main + 2 Findings).
• Sep. 2024: Three papers got accepted to EMNLP2024 main conference.
• Aug. 2024: One paper got accepted to Journal of TALLIP.
• May. 2024: Two papers got accepted to ACL2024.
• Feb. 2024: One paper got accepted to COLING2024.
• Oct. 2023: Two papers got accepted to EMNLP2023.
• Apr. 2023: Invited Tutorial talk about Large Language Models and ChatGPT at ShanDong Association of Artificial Intelligence (SDAAI), Jinan. [slides]
• Apr. 2023: Invited Tutorial talk about Large Language Models and ChatGPT at Beijing Academy of Artificial lntelligence (BAAl), Beijing. [slides]
• Feb. 2023: Three papers got accepted to ICASSP2023.
• Feb. 2023: Invited talk about Knowledge-enhanced Dialogue Generation & ChatGPT at QingYuanTalk, online.
• Jan. 2023: One paper got accepted to WWW2023.
• Jan. 2023: Invited to serve as the program committee for ICML 2023.
• Dec. 2022: Invited to serve as the Dialogue & Interactive Systems Track Area Chair for ACL 2023.
• Dec. 2022: Invited talk about Knowledge-enhanced Dialogue Generation at Huawei, Nanjing.
• Nov. 2022: One paper got accepted to AAAI2023.
• Oct. 2022: Invited to serve as the Generation and Summarization track Area Chair for EACL 2023.
• Sep. 2022: Invited talk about Text Generation and Applications at ACM Nanjing Rising Star Award Workshop.
• Aug. 2022: Invited talk about Dialogue Generation at SMP2022-Socialbot Workshop.

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Working Experience

• Professor, NUAA, 202106-Present
• Senior Researcher, Tencent AI Lab, 2018-2021
• Co-Founder, LpNorm, 2016-02-22
• Part-time R&D Engineer, 4Paradigm, 2015
• Full-time R&D Engineer, Wumii, 2013-2014
• Full-time R&D Engineer, Baidu, 2012-2013

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Publications

[Google Scholar]

• Shuo Feng, Piji Li*.  ViSMoE: Visual-Aware Sparse Mixture-of-Experts for Embodied Referring Expression Grounding . International Conference on Artificial Neural Networks (ICANN'2025). Kaunas, Lithuania, September 9–September 12, 2025.
• Zexuan Li, Hongliang Dai*, and Piji Li. Generating Diverse Training Samples for Relation Extraction with Large Language Models . Annual Meeting of the Association for Computational Linguistics (ACL'2025). Vienna, Austria, July 27 to August 1, 2025
• Congchi Yin, Yongpeng Zhang, Xuyun Wen, Piji Li*. Improve Language Model and Brain Alignment via Associative Memory . The 63rd Annual Meeting of the Association for Computational Linguistics (Findings of ACL'2025). Vienna, Austria, July 27-Aug 1, 2025.
• Runze Xia, Shuo Feng, Renzhi Wang, Congchi Yin, Xuyun Wen, and Piji Li*. Improving Brain-to-Image Reconstruction via Fine-Grained Text Bridging. Annual Meeting of the Cognitive Science Society (CogSci'2025). San Francisco, July 30–Aug 2, 2025.
• Renzhi Wang and Piji Li*. LEMoE: Advanced Mixture of Experts Adaptor for Lifelong Model Editing of Large Language Models. The 2024 Conference on Empirical Methods in Natural Language Processing (Main Conference of EMNLP'24). Miami, Florida, 12–16 November, 2024.
• Fan Yuan, Chi Qin, Xiaogang Xu and Piji Li*. HELPD: Mitigating Hallucination of LVLMs by Hierarchical Feedback Learning with Vision-enhanced Penalty Decoding. The 2024 Conference on Empirical Methods in Natural Language Processing (Main Conference of EMNLP'2024). Miami, Florida, 12–16 November, 2024.
• Runze Xia, Congchi Yin and Piji Li*. Decoding the Echoes of Vision from fMRI: Memory Disentangling for Past Semantic Information. The 2024 Conference on Empirical Methods in Natural Language Processing (Main Conference of EMNLP'2024). Miami, Florida, 12–16 November, 2024.
• Xi Wang, Ruoqing Zhao, Jing Li and Piji Li*. An Unsupervised Domain-Adaptive Framework for Chinese Spelling Checking. ACM Transactions on Asian and Low-Resource Language Information Processing. Just Accepted (August 2024).
• Renzhi Wang and Piji Li*. Semantic are Beacons: A Semantic Perspective for Unveiling Parameter-Efficient Fine-Tuning in Knowledge Learning. The 62nd Annual Meeting of the Association for Computational Linguistics (Findings of ACL'2024). Bangkok, Thailand, 11–16 August, 2024. [PDF]
• Sirry Chen, Feng Shuo, Liang Songsong, Chen-Chen Zong, Jing Li, and Piji Li*. CACL: Community-aware heterogeneous graph contrastive learning for social media bot detection. The 62nd Annual Meeting of the Association for Computational Linguistics (Findings of ACL'2024). Bangkok, Thailand, 11–16 August, 2024. [PDF]
• Xuanfan Ni, Hengyi Cai, Xiaochi Wei, Shuaiqiang Wang, Dawei Yin, and Piji Li*. XL2Bench: A Benchmark for Extremely Long Context Understanding with Long-range Dependencies. arXiv preprint arXiv:2404.05446 (2024). [PDF]
• Xi Wang, Hongliang Dai, Shen Gao, and Piji Li*. Characteristic AI Agents via Large Language Models. The 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation(LREC-COLING'2024). Torino, Italy, 20-25 May, 2024. [PDF]
• Yihong Liu, Zishang Chen, Yukang Cui, and Piji Li*. Segmentation-Driven Image Enhancement Based on Deep Reinforcement Learning. the 27th European Conference on Artificial Intelligence (ECAI'2024). Santiago de Compostela. 19-24 October 2024. [PDF]
• Yang Cao, Yangsong Lan, Feiyan Zhai, and Piji Li*. 5W1H Extraction with Large Language Models. The 2024 International Joint Conference on Neural Networks (IEEE WCCI-IJCNN'2024). Yokohama, Japan, June 30-July 5,2024. [PDF]
• Xi Wang, Ruoqing Zhao, Hongliang Dai, and Piji Li*. An Empirical Investigation of Domain Adaptation Ability for Chinese Spelling Check Models. 2024 IEEE international Conference on acoustics speech and signal processing (ICASSP'2024). Seoul, Korea, April 14-19, 2024. [PDF]
• Xuanfan Ni, Hongliang Dai, Zhaochun Ren, and Piji Li*. Multi-Source Multi-Type Knowledge Exploration and Exploitation for Dialogue Generation. The Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing (EMNLP'2023). Singapore, December 6-10, 2023. [PDF]
• Renzhi Wang, Jing Li, and Piji Li*. InfoDiffusion: Information Entropy Aware Diffusion Process for Non-Autoregressive Text Generation. Findings of The 2023 Conference on Empirical Methods in Natural Language Processing (Findings of EMNLP'2023). Singapore, December 6-10, 2023. [PDF]
• Wenjie Zhou, Piji Li*, Zhaoyang Han, Xiaozhen Lu, Juan Li, Zhaochun Ren, and Zhe Liu. Privacy-Preserving Federated Learning via Disentanglement. The 32nd ACM International Conference on Information and Knowledge Management (CIKM'2023), Birmingham, UK, October 21-25, 2023. [PDF]
• Wenjie Zhou, Zhaoyang Han, Chuan Ma, Zhe Liu, and Piji Li*. Interpretability-based Cross-Silo Federated Learning. The CAAI International Conference on Artificial Intelligence (CICAI'2023), Fuzhou, Fujian, China, July 22-23, 2023. [PDF]
• Ruoqing Zhao, Xi Wang, Hongliang Dai, Pan Gao, Piji Li*. Medical Report Generation based on Segment-Enhanced Contrastive Representation Learning. The 12th CCF International Conference on Natural Language Processing and Chinese Computing(NLPCC'2023), Foshan,Guangdong, China,October 12-15,2023. [PDF]
• Xuan Sheng, Zhicheng Li, Zhaoyang Han, Xiangmao Chang, and Piji Li*. Punctuation Matters! Stealthy Backdoor Attack for Language Models. The 12th CCF International Conference on Natural Language Processing and Chinese Computing(NLPCC'2023), Foshan, Guangdong, China, October 12-15, 2023. [PDF]
• Zhicheng Li, Piji Li*, Xuan Sheng, Changchun Yin and Lu Zhou. IMTM: Invisible Multi-Trigger Multimodal Backdoor Attack. The 12th CCF International Conference on Natural Language Processing and Chinese Computing(NLPCC'2023), Foshan, Guangdong, China,October 12-15,2023. [PDF]
• Congchi Yin, Piji Li*, and Zhaochun Ren. CTRLStruct: Dialogue Structure Learning for Open-Domain Response Generation. The Web Conference 2023 (WWW'2023), Austin, TX, USA, May 1-5, 2023. [PDF]
• Shuo Feng, Piji Li*. Ancient Chinese Word Segmentation and Part-of-Speech Tagging Using Distant Supervision. The 48th IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'2023), Rhodes Island, Greece, June 4–10, 2023. [PDF]
• Zikang Jin, Changchun Yin, Piji Li*, Lu Zhou, Liming Fang, Xiangmao Chang and Zhe Liu. Multi-layer Feature Division Transferable Adversarial Attack. The 48th IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP'2023), Rhodes island, Greece, June 4-10, 2023. [PDF]
• Yougang Lyu, Piji Li, Yechang Yang, Maarten de Rijke, Pengjie Ren, Yukun Zhao, Dawei Yin, Zhaochun Ren. Feature-Level Debiased Natural Language Understanding. Thirty-Seventh AAAI Conference on Artificial Intelligence (AAAI'2023). USA. Feb. 2023. [PDF]
• Chunpu Xu, Hanzhuo Tan, Jing Li and Piji Li. Understanding Social Media Cross-Modality Discourse in Linguistic Space. Findings of The 2022 Conference on Empirical Methods in Natural Language Processing (EMNLP'2022 Findings). Abu Dhabi. Dec. 2022. [PDF]
• Piji Li. uChecker: Masked Pretrained Language Models as Unsupervised Chinese Spelling Checkers. The 29th International Conference on Computational Linguistics (COLING'2022). Gyeongju, Korea. Oct. 2022. [PDF]
• Qingyue Wang, Yanan Cao, Piji Li, Yanhe Fu, Zheng Lin and Li Guo. Slot Dependency Modeling for Zero-Shot Cross-Domain Dialogue State Tracking. The 29th International Conference on Computational Linguistics (COLING'2022). Gyeongju, Korea. Oct. 2022. [PDF]
• Xuan Sheng, Zhaoyang Han, Piji Li*, Xiangmao Chang. A Survey on Backdoor Attack and Defense in Natural Language Processing. The 22nd IEEE International Conference on Software Security and Reliability (QRS'2022). Guangzhou, China. Dec. 2022. [PDF]
• Shuming Shi, Enbo Zhao, Duyu Tang, Yan Wang, Piji Li, Wei Bi, Haiyun Jiang et al. Effidit: Your AI Writing Assistant. arXiv preprint arXiv:2208.01815. 2022. [PDF]
• Xuanfan Ni and Piji Li*. 2022. A Story Generation Method Incorporating Prompt Learning (In Chinese). In Proceedings of the 21st Chinese National Conference on Computational Linguistics, pages 166–177, Nanchang, China. Chinese Information Processing Society of China. 2022 [PDF]
• Xiao Liu, Min Yang, Ziyu Lyu, Dongding Lin, Piji Li, and Ruifeng Xu. Hierarchical conversation flow transition and reasoning for conversational machine comprehension. Neural Computing and Applications , 1-16. 2022. [PDF]
• Aiping Zhang, Liming Fang, Chunpeng Ge, Piji Li, and Zhe Liu. Efficient transformer with code token learner for code clone detection. Journal of Systems and Software. pages: 111-557. 2022. [PDF]
• Yundi Shi, Piji Li*, Changchun Yin, Zhaoyang Han, Lu Zhou, and Zhe Liu. PromptAttack: Prompt-Based Attack for Language Models via Gradient Search. The 11th CCF International Conference In Natural Language Processing and Chinese Computing (NLPCC'2022), Guilin, China, September 24–25, pp. 682-693. 2022. [PDF]
• Hanwei Wang, Piji Li, Yanan Cao, Ruipeng Jia, Wang Hai-long and Li Yang-chun. Decoupled Extractive Summarization as Graph Nodes Pruning. The 2022 International Joint Conference on Neural Networks (IJCNN'2022). Padua, Italy. July, 2022. [PDF]
• Chen Xu, Piji Li, Wei Wang, Haoran Yang, Siyun Wang, Chuangbai Xiao. COSPLAY:Concept Set Guided Personalized Dialogue Generation Across Both Party Personas. The 45th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'22). July. 2022. [PDF]
• Qintong Li, Piji Li, Wei Bi, Zhaochun Ren, Yuxuan Lai, Lingpeng Kong. Event Transition Planning for Open-ended Text Generation. The 60th Annual Meeting of the Association for Computational Linguistics (Findings of ACL'22). Aug. 2022. [PDF]
• Yong Dai, Linyang Li, Cong Zhou, Zhangyin Feng, Enbo Zhao, Xipeng Qiu, Piji Li, Duyu Tang. "Is Whole Word Masking Always Better for Chinese BERT?": Probing on Chinese Grammatical Error Correction. The 60th Annual Meeting of the Association for Computational Linguistics (Findings of ACL'22). Aug. 2022. [PDF]
• Qintong Li, Piji Li*, Zhumin Chen, Pengjie Ren and Zhaochun Ren*. Knowledge Bridging for Empathetic Dialogue Generation. Thirty-Sixth AAAI Conference on Artificial Intelligence (AAAI'22). Feb. 2022. [PDF]
• Haoran Yang, Wai Lam and Piji Li. Contrastive Representation Learning for Exemplar-Guided Paraphrase Generation. Findings of The 2021 Conference on Empirical Methods in Natural Language Processing (Findings of EMNLP'21). Nov. 2021. [PDF]
• Wang Chen, Piji Li, Hou Pong Chan and Irwin King. Dialogue Summarization with Supporting Utterance Flow Modeling and Fact Regularization. Journal of Knowledge-Based Systems. Aug. 2021. [PDF]
• Wei Wang, Piji Li and Hai-Tao Zheng. Sentence Semantic Regression for Text Generation. arXiv:2108.02984. Aug. 2021. [PDF]
• Piji Li and Shuming Shi. Tail-to-Tail Non-Autoregressive Sequence Prediction for Chinese Grammatical Error Correction. The 59th Annual Meeting of the Association for Computational Linguistics (ACL'21). Aug. 2021. [PDF]
• Wang Chen, Piji Li and Irwin King. A Training-free and Reference-free Summarization Evaluation Metric via Centrality-weighted Relevance and Self-referenced Redundancy. The 59th Annual Meeting of the Association for Computational Linguistics (ACL'21). Aug. 2021. [PDF]
• Dong Wang, Ning Ding (equal contribution with Dong), Piji Li^* and Hai-Tao Zheng^*. CLINE: Contrastive Learning with Semantic Negative Examples for Natural Language Understanding. The 59th Annual Meeting of the Association for Computational Linguistics (ACL'21). Aug. 2021. [PDF]
• Wei Wang, Piji Li and Hai-Tao Zheng. Generating Diversified Comments via Reader-Aware Topic Modeling and Saliency Detection. The Thirty-Fifth AAAI Conference on Artificial Intelligence (AAAI'21). Feb. 2021. [PDF]
• Wei Wang, Piji Li and Hai-Tao Zheng. Consistency and Coherency Enhanced Story Generation. The 43rd edition of the annual BCS-IRSG European Conference on Information Retrieval (ECIR'21). Apr. 2021. [PDF]
• Qintong Li, Piji Li, Xinyi Li, Zhumin Chen, Zhaochun Ren and Maarten de Rijke. Abstractive Opinion Tagging. The 14th ACM International Conference on Web Search and Data Mining (WSDM'21). Mar. 2021. [PDF]
• Yixuan Su, Deng Cai, Yan Wang, David Vandyke, Simon Baker, Piji Li and Nigel Collier. Non-Autoregressive Text Generation with Pre-trained Language Models. The 2021 Conference of the European Chapter of the Association for Computational Linguistics (EACL'21). Apr. 2021. [PDF]
• Ruize Wang, Zhongyu Wei, Ying Cheng, Piji Li, Haijun Shan, Ji Zhang, Qi Zhang, Xuanjing Huang. Keep it Consistent: Topic-Aware Storytelling from an Image Stream via Iterative Multi-agent Communication. The 28th International Conference on Computational Linguistics (COLING'20). Dec. 2020. [PDF]
• Yifan Gao, Piji Li, Wei Bi, Xiaojiang Liu, Michael Lyu and Irwin King. Dialogue Generation on Infrequent Sentence Functions via Structured Meta-Learning. The Conference on Empirical Methods in Natural Language Processing (EMNLP'20). Findings of EMNLP. Nov. 2020. [PDF]
• Xin Li, Piji Li, Yan Wang, Xiaojiang Liu, and Wai Lam. Enhancing Dialogue Generation via Multi-Level Contrastive Learning. arXiv preprint arXiv:2009.09147. Sep. 2020. [PDF]
• Piji Li, Haisong Zhang, Xiaojiang Liu, and Shuming Shi. Rigid Formats Controlled Text Generation. The 58th annual meeting of the Association for Computational Linguistics (ACL'20). Jul. 2020. [PDF] [Code]
• Wang Chen, Hou Pong Chan, Piji Li, and Irwin King. Exclusive Hierarchical Decoding for Deep Keyphrase Generation. The 58th annual meeting of the Association for Computational Linguistics (ACL'20). Jul. 2020. [PDF]
• Piji Li, Lidong Bing, Zhongyu Wei, and Wai Lam. Salience Estimation with Multi-Attention Learning for Abstractive Text Summarization. arXiv preprint arXiv:2004.03589. Apr. 2020. [PDF]
• Piji Li. An Empirical Investigation of Pre-Trained Transformer Language Models for Open-Domain Dialogue Generation. arXiv preprint arXiv:2003.04195. Mar. 2020. [PDF]
• Minghong Xu, Piji Li^*, Haoran Yang, Pengjie Ren, Zhaochun Ren^*, Zhumin Chen and Jun Ma. A Neural Topical Expansion Framework for Unstructured Persona-oriented Dialogue Generation. The 24th European Conference on Artificial Intelligence (ECAI'20). June. 2020. [PDF]
• Xin Li, Piji Li, Wei Bi, Xiaojiang Liu, and Wai Lam. Relevance-Promoting Language Model for Short-Text Conversation. Thirty-Fourth AAAI Conference on Artificial Intelligence (AAAI'20). Feb. 2020. [PDF]
• Ruize Wang, Zhongyu Wei, Piji Li, Qi Zhang, and Xuanjing Huang. Storytelling from an Image Stream using Scene Graphs. Thirty-Fourth AAAI Conference on Artificial Intelligence (AAAI'20). Feb. 2020. [PDF]
• Mingyue Shang, Piji Li, Zhenxin Fu, Lidong Bing, Dongyan Zhao, Shuming Shi, and Rui Yan. Semi-supervised Text Style Transfer: Cross Projection in Latent Space. The Conference on Empirical Methods in Natural Language Processing (EMNLP'19). Nov. 2019. [PDF] [Data]
• Shen Gao, Xiuying Chen, Piji Li, Zhangming Chan, Dongyan Zhao, and Rui Yan. How to Write Summaries with Patterns? Learning towards Abstractive Summarization through Prototype Editing. The Conference on Empirical Methods in Natural Language Processing (EMNLP'19). Nov. 2019. [PDF]
• Zihao Wang, Kwunping Lai, Piji Li, Lidong Bing, and Wai Lam. Tackling Long-Tailed Relations and Uncommon Entities in Knowledge Graph Completion. The Conference on Empirical Methods in Natural Language Processing (EMNLP'19). Nov. 2019. [PDF]
• Xin Shen, Wai Lam, Xunying Liu, Piji Li. Compressive Multi-document Summarization with Sense-level Concepts. IJCAI-Tusion Workshop 2019. Aug. 2019. [PDF]
• Yifan Gao, Piji Li, Irwin King, and Michael R. Lyu. Interconnected Question Generation with Coreference Alignment and Conversation Flow Modeling. Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics (ACL'19). Jul. 2019. [PDF]
• Piji Li, Zihao Wang, Lidong Bing, Wai Lam. Persona-Aware Tips Generation. Proceedings of The Web Conference (WWW'19). May. 2019. [PDF]
• Wang Chen, Hou Pong Chan, Piji Li, Lidong Bing, Irwin King. An Integrated Approach for Keyphrase Generation via Exploring thePower of Retrieval and Extraction. Proceedings of the 17th Annual Conference of the North American Chapter of the Association for Computational Linguistics (NAACL'19). Jun. 2019. [PDF]
• Shen Gao, Xiuying Chen, Piji Li, Lidong Bing, Zhaochun Ren, Dongyan Zhao, Rui Yan. Abstractive Text Summarization by Incorporating Reader Comments. Proceedings of the Thirty-Third AAAI Conference on Artificial Intelligence (AAAI'19). Jan. 2019. [PDF]
• Xin Li, Lidong Bing, Piji Li, Wai Lam. A Unified Model for Opinion Target Extraction and Target Sentiment Prediction. Proceedings of the Thirty-Third AAAI Conference on Artificial Intelligence (AAAI'19). Jan. 2019. [PDF]
• Yifan Gao, Lidong Bing, Piji Li, Irwin King, Michael R. Lyu. Generating Distractors for Reading Comprehension Questions from Real Examinations. Proceedings of the Thirty-Third AAAI Conference on Artificial Intelligence (AAAI'19). Jan. 2019. [PDF]
• Yi Liao, Lidong Bing, Piji Li, Shuming Shi, Wai Lam, and Tong Zhang. QuaSE: Accurate Text Style Transfer under Quantifiable Guidance. The Conference on Empirical Methods in Natural Language Processing (EMNLP'18). 2018. [PDF]
• Zhihao Fan, Zhongyu Wei, Piji Li, Yanyan Lan, and Xuanjing Huang. A Question Type Driven Framework to Diversify Visual Question Generation. Proceedings of the 27th International Joint Conference on Artificial Intelligence (IJCAI'18). Stockholm, Sweden. 2018.
• Xin Li, Lidong Bing, Piji Li, Wai Lam, and Zhimou Yang. Aspect Term Extraction with History Attention and Selective Transformation. Proceedings of the 27th International Joint Conference on Artificial Intelligence (IJCAI'18). Stockholm, Sweden. 2018.
• Piji Li, Lidong Bing, and Wai Lam. Actor-Critic based Training Framework for Abstractive Summarization. arXiv preprint arXiv:1803.11070 (2018). Mar 2018. [PDF]
• Lidong Bing, Zheng-Yu Niu, Piji Li, Wai Lam, and Haifeng Wang. Learning a Unified Embedding Space of Web Search from Large-scale Query Log. Knowledge-Based Systems. 2018.
• Piji Li. Optimization Algorithms for Deep Learning. Jul 2017. [PDF]
• Piji Li, Wai Lam, Lidong Bing, and Zihao Wang. Deep Recurrent Generative Decoder for Abstractive Text Summarization. Proceedings of the Conference on Empirical Methods in Natural Language Processing (EMNLP'17). Sep 2017. [PDF] [Code]
• Piji Li, Wai Lam, Lidong Bing, Weiwei Guo, and Hang Li. Cascaded Attention based Unsupervised Information Distillation for Compressive Summarization. Proceedings of the Conference on Empirical Methods in Natural Language Processing (EMNLP'17). Sep 2017. [PDF]
• Piji Li, Lidong Bing, Wai Lam. Reader-Aware Multi-Document Summarization: An Enhanced Model and The First Dataset. Proceedings of the EMNLP 2017 Workshop on New Frontiers in Summarization (EMNLP-NewSum'17). Sep 2017. [PDF] [Dataset] [Code]
• Piji Li, Zihao Wang, Zhaochun Ren, Lidong Bing, and Wai Lam. Neural Rating Regression with Abstractive Tips Generation for Recommendation. Proceedings of the The 40th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'17). Aug 2017. [PDF]
• Piji Li, Zihao Wang, Wai Lam, Zhaochun Ren, and Lidong Bing. Salience Estimation via Variational Auto-Encoders for Multi-Document Summarization. Proceedings of the 31st AAAI Conference on Artificial Intelligence (AAAI'17). Feb 2017. [PDF] [Code]
• Hongya Song, Zhaochun Ren, Piji Li, Shangsong Liang, Jun Ma, Maarten de Rijke. Summarizing Answers in Non-Factoid Community Question-Answering. Proceedings of the 10th International Conference on Web Search and Data Mining (WSDM'17). Feb 2017.
• Zhaochun Ren, Shangsong Liang, Piji Li, Shuaiqiang Wang, Maarten de Rijke. Social Collaborative Viewpoint Regression with Explainable Recommendations. Proceedings of the 10th International Conference on Web Search and Data Mining (WSDM'17). Feb 2017.
• Zhaochun Ren, Hongya Song, Piji Li, Shangsong Liang, Jun Ma, Maarten de Rijke. Using Sparse Coding for Answer Summarization in Non-Factoid Community Question-Answering. Proceedings of the SIGIR 2016 workshop: Web Question Answering, Beyond Factoids (WebQA '17). Jun 2016.
• Lidong Bing, Piji Li, Yi Liao, Wai Lam, Weiwei Guo, Rebecca J Passonneau. Abstractive Multi-Document Summarization via Phrase Selection and Merging. Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics (ACL'15). Beijing, China. July 26-31, 2015.
• Piji Li, Lidong Bing, Wai Lam, Hang Li and Yi Liao. Reader-Aware Multi-Document Summarization via Sparse Coding. Proceedings of the 24th International Joint Conference on Artificial Intelligence (IJCAI'15). Buenos Aires, Argentina. July 25-31, 2015. [PDF]
• Piji Li, Jun Ma, Shuai Gao. Learning to summarize web image and text mutually. Proceedings of the 2nd ACM International Conference on Multimedia Retrieval (ICMR'12). Hong Kong. Jun 2012. [PDF]
• Piji Li, Jun Ma, Dongmei Zhang, Xiaohui Han. Extraction and Ranking of Tags for User Opinions. Journal of Chinese Information Processing. 2012. PDF]
• Chaoran Cui, Jun Ma, Lei Zhang, Piji Li, Zhaochun Ren. A hybrid relevant-diverse approach for image re-ranking with multiple features. International Journal of Computer Mathematics. 2011.
• Piji Li, Jun Ma, Lei Zhang. Results selection diversity for web image retrieval. International Journal of Computer Mathematics. 2011.
• Piji Li, Jun Ma. What is happening in a still picture? Proceedings of the The First Asian Conference on Pattern Recognition (ACPR'11). Beijing, China. Dec 2011. [PDF]
• Piji Li, Jun Ma, Shuai Gao. Actions in still web images: visualization, detection and retrieval. Proceedings of the International Conference on Web-Age Information Management (WAIM'11). Sep 2011.
• Lei Zhang, Jun Ma, Chaoran Cui, Piji Li. Active learning through notes data in flickr: an effortless training data acquisition approach for object localization. Proceedings of the 1st ACM International Conference on Multimedia Retrieval (ICMR'11). Trento , Italy. Apr. 2011.
• Lei Zhang, Piji Li, Jun Ma. A hybrid unsupervised image re-ranking approach with latent topic contents. Proceedings of the ACM International Conference on Image and Video Retrieval (CIVR'10). Jul 2010.
• Piji Li, Lei Zhang, Jun Ma. Dual-ranking for web image retrieval. Proceedings of the ACM International Conference on Image and Video Retrieval (CIVR'10). Jul 2010.
• Piji Li, Jun Ma. Learning to rank for web image retrieval based on genetic programming. Proceedings of the 2nd IEEE International Conference on Broadband Network & Multimedia Technology (BNMT'09). Oct 2009.

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PhD Thesis

• Piji Li. Neural Text Summarization and Generation. CUHK. July 2018. [PDF]

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Professional Service

• Area Chair/Senior Program Committee (SPC):
  • EMNLP 2020 (Summarization), EMNLP 2022 (Generation)
  • IJCAI 2021 (Summarization)
  • Action Editor of ACL ARR
  • EACL 2023/2024
  • ACL 2023 (Dialogue & Interactive Systems)
  • NAACL 2024
  • NLPCC 2022/2023
  • CCL 2023
• Associate Editor (AE):
  • Neurocomputing (2021~)
• Program Committee/Reviewing:
  • ICML, NIPS, ICLR, AAAI, IJCAI
  • ACL, EMNLP, NAACL, AACL, CCL, NLPCC
  • SIGIR, CIKM, WSDM, CCIR
  • TACL, CL, TOIS, TKDE, JCST, IRJ
• Session Chair: EMNLP 2020, ICONIP 2020

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Resources

• Dataset:
  • RA-MDS: Reader-Aware Multi-Document Summarization [link ]
• Code: https://github.com/lipiji

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Last update: Sep., 2022.