--- title: "Pengjie Ren · Shandong University — author profile and papers" description: "Pengjie Ren, Shandong University: 3 papers on Elamur Research (2023–2026), h-index 34 — affiliations, topics, co-authors and who cites…" canonical: "https://research.elamur.ai/free/en/authors/pengjie-ren/" --- [Elamur Research](https://md.research.elamur.ai/free/en/) · [this page in HTML](https://research.elamur.ai/free/en/authors/pengjie-ren/) [home](https://md.research.elamur.ai/free/en/) / [authors](https://md.research.elamur.ai/free/en/authors/) / Pengjie Ren # Pengjie Ren Pengjie Ren has 3 papers in our library, in 2023–2026, most of them on [Information retrieval & search](https://md.research.elamur.ai/free/en/topics/information-retrieval/), [Question answering](https://md.research.elamur.ai/free/en/topics/question-answering/); often with [Zhumin Chen](https://md.research.elamur.ai/free/en/authors/zhumin-chen/), [Weiwei Sun](https://md.research.elamur.ai/free/en/authors/weiwei-sun/), [Zhaochun Ren](https://md.research.elamur.ai/free/en/authors/zhaochun-ren/). 3 papers in our library · 2023–2026 [OpenAlex](https://openalex.org/A5046700486) · [ORCID](https://orcid.org/0000-0003-2964-6422) · [Wikidata](https://www.wikidata.org/wiki/Q130863027) · [**h-index 34**](https://openalex.org/authors/A5046700486) · [175 works](https://openalex.org/works?filter=author.id:A5046700486) · [5,426 citations](https://openalex.org/works?filter=author.id:A5046700486&sort=cited_by_count:desc) OpenAlex, 2026-10-14 [📄 3 works in our library](https://md.research.elamur.ai/free/en/authors/pengjie-ren/#papers) · [🔗 Cited 365 times in our library](https://md.research.elamur.ai/free/en/authors/pengjie-ren/cited-by/) · [4 more in our library without a page yet](#also) · [⭐ Paper Stars ranking: #3982](https://md.research.elamur.ai/free/en/paper-stars/page/40/#star-3982) The profile is the library's match of the name; two people with one name are not always told apart. Elsewhere: [Google Scholar](https://scholar.google.com/citations?view_op=search_authors&mauthors=Pengjie+Ren) · [Semantic Scholar](https://www.semanticscholar.org/search?q=Pengjie+Ren) · [dblp](https://dblp.org/search?q=Pengjie+Ren) · [ACL Anthology](https://aclanthology.org/search/?q=Pengjie+Ren) ## Affiliations [🎓**Shandong University** Jinan · China 2013–2026 · 151 papers*current*](https://md.research.elamur.ai/free/en/universities/shandong-university/) · [🎓**University of Amsterdam** Amsterdam · Netherlands 2019–2021 · 30 papers](https://md.research.elamur.ai/free/en/universities/university-of-amsterdam/) · [🎓**Leiden University** Leiden · Netherlands 2024–2026 · 2 papers](https://md.research.elamur.ai/free/en/universities/leiden-university/) From the bylines of their papers (OpenAlex, 2026-10-14), ORCID and Wikidata; institutions on papers are matched by machine. 5 more institutions on single bylines are not listed. ## Fields, topics and concepts Of its works in our library, with the number of works on each. 📚 Shelves 6 The field of science this work belongs to (OpenAlex fields).[Arts and Humanities · 3 works](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/) · [Computer Science · 3 works](https://md.research.elamur.ai/free/en/shelves/computer-science/) · [Artificial Intelligence · 3 works](https://md.research.elamur.ai/free/en/shelves/computer-science/artificial-intelligence/) · [Language and Linguistics · 3 works](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/language-and-linguistics/) · [Information Systems · 2 works](https://md.research.elamur.ai/free/en/shelves/computer-science/information-systems/) · [Computer Vision and Pattern Recognition · 1 work](https://md.research.elamur.ai/free/en/shelves/computer-science/computer-vision-and-pattern-recognition/) 🧭 Topics 2 Research subjects and languages the work is about.[Information retrieval & search · 2 works](https://md.research.elamur.ai/free/en/topics/information-retrieval/) · [Question answering · 1 work](https://md.research.elamur.ai/free/en/topics/question-answering/) 💡 Concepts 1 Key ideas and methods explained on our concept pages.[Latent semantic indexing · 1 work](https://md.research.elamur.ai/free/en/concepts/latent-semantic-indexing/) ## Works by year ### 2020s [**2026** 1 paper](https://md.research.elamur.ai/free/en/authors/pengjie-ren/year/2026/) · [**2024** 1 paper](https://md.research.elamur.ai/free/en/authors/pengjie-ren/year/2024/) · [**2023** 1 paper](https://md.research.elamur.ai/free/en/authors/pengjie-ren/year/2023/) ## Papers The most cited first (OpenAlex and our library). 1. **[Is ChatGPT Good at Search? Investigating Large Language Models as Re-Ranking Agents](https://md.research.elamur.ai/free/en/papers/sun-2023-chatgpt-good-search-investigating-large/)** *(2023 · 496 citations)* Most earlier attempts to use large language models in search had them generate queries or documents. This paper asks whether chat-style models such as ChatGPT and GPT-4 can directly re-order a set of retrieved passages by relevance. Older prompting styles, query generation and relevance generation, gave weak results… 2. **[Generate-then-Ground in Retrieval-Augmented Generation for Multi-hop Question Answering](https://md.research.elamur.ai/free/en/papers/shi-2024-generate-then-ground-retrieval-augmented/)** *(2024 · 65 citations)* Multi-hop question answering (MHQA) requires LLMs to chain several pieces of knowledge. The usual retrieve-then-read approach depends on the retriever's quality and can be misled by noisy documents. It also ignores what the model already knows. The authors propose GenGround, a generate-then-ground framework that… 3. **[Spectral Characterization and Mitigation of Sequential Knowledge Editing Collapse](https://md.research.elamur.ai/free/en/papers/zhang-2026-spectral-characterization-mitigation-sequential-knowledge/)** *(2026)* The paper investigates why large language models degrade sharply when facts are edited one after another over long horizons, a failure common to parameter-modifying editors such as MEMIT, RECT, PRUNE and AlphaEdit. ## All works 7 works of theirs in our library, the most cited first; 3 with a page here, the others link their original until we summarise them. 1. **[Is ChatGPT Good at Search? Investigating Large Language Models as Re-Ranking Agents](https://md.research.elamur.ai/free/en/papers/sun-2023-chatgpt-good-search-investigating-large/) [Conference on Empirical Methods in Natural Language Processing (EMNLP)](https://md.research.elamur.ai/free/en/venues/emnlp/)**Weiwei Sun, Lingyong Yan, Xinyu Ma, et al.*2023 · 496 citations* 2. **[RepeatNet: A Repeat Aware Neural Recommendation Machine for Session-Based Recommendation ↗](https://doi.org/10.1609/aaai.v33i01.33014806) Proceedings of the AAAI Conference on Artificial Intelligence · no summary yet**Pengjie Ren et al.*2019 · 266 citations* 3. **[EmpDG: Multi-resolution Interactive Empathetic Dialogue Generation ↗](https://aclanthology.org/2020.coling-main.394/) Proceedings of the 28th International Conference on Computational Linguistics · no summary yet**Qintong Li et al.*2020 · 184 citations* 4. **[Generate-then-Ground in Retrieval-Augmented Generation for Multi-hop Question Answering](https://md.research.elamur.ai/free/en/papers/shi-2024-generate-then-ground-retrieval-augmented/) [Annual Meeting of the Association for Computational Linguistics (ACL)](https://md.research.elamur.ai/free/en/venues/acl/)**Zhengliang Shi, Shuo Zhang, Weiwei Sun, et al.*2024 · 65 citations* 5. **[Syllogistic Reasoning for Legal Judgment Analysis ↗](https://aclanthology.org/2023.emnlp-main.864/) Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing · no summary yet**Wentao Deng et al.*2023 · 60 citations* 6. **[Multi-Defendant Legal Judgment Prediction via Hierarchical Reasoning ↗](https://aclanthology.org/2023.findings-emnlp.145/) Findings of the Association for Computational Linguistics: EMNLP 2023 · no summary yet**Yougang Lyu et al.*2023 · 20 citations* 7. **[Spectral Characterization and Mitigation of Sequential Knowledge Editing Collapse](https://md.research.elamur.ai/free/en/papers/zhang-2026-spectral-characterization-mitigation-sequential-knowledge/) [Annual Meeting of the Association for Computational Linguistics (ACL)](https://md.research.elamur.ai/free/en/venues/acl/)**Chi Zhang, Mengqi Zhang, Xiaotian Ye, et al.*2026* ## Co-authors here 12 co-authors with a page, the most papers together first. - [Zhumin Chen](https://md.research.elamur.ai/free/en/authors/zhumin-chen/) ×3 - [Weiwei Sun](https://md.research.elamur.ai/free/en/authors/weiwei-sun/) ×2 - [Zhaochun Ren](https://md.research.elamur.ai/free/en/authors/zhaochun-ren/) ×2 - [Chi Zhang](https://md.research.elamur.ai/free/en/authors/chi-zhang/) - [Dawei Yin](https://md.research.elamur.ai/free/en/authors/dawei-yin/) - [Lingyong Yan](https://md.research.elamur.ai/free/en/authors/lingyong-yan/) - [Runxi Cheng](https://md.research.elamur.ai/free/en/authors/runxi-cheng/) - [Shen Gao](https://md.research.elamur.ai/free/en/authors/shen-gao/) - [Shuaiqiang Wang](https://md.research.elamur.ai/free/en/authors/shuaiqiang-wang/) - [Shuo Zhang](https://md.research.elamur.ai/free/en/authors/shuo-zhang/) - [Xinyu Ma](https://md.research.elamur.ai/free/en/authors/xinyu-ma/) - [Zhengliang Shi](https://md.research.elamur.ai/free/en/authors/zhengliang-shi/) ## Venues Where their works here were published, the most works first, with the editions of those that have a page. - [Annual Meeting of the Association for Computational Linguistics (ACL)](https://md.research.elamur.ai/free/en/venues/acl/) ×2: [ACL 2026](https://md.research.elamur.ai/free/en/venues/acl/2026/), [ACL 2024](https://md.research.elamur.ai/free/en/venues/acl/2024/) - [Conference on Empirical Methods in Natural Language Processing (EMNLP)](https://md.research.elamur.ai/free/en/venues/emnlp/) ×2: [EMNLP 2023](https://md.research.elamur.ai/free/en/venues/emnlp/2023/) - Findings of the Association for Computational Linguistics: EMNLP 2023 - Proceedings of the 28th International Conference on Computational Linguistics - Proceedings of the AAAI Conference on Artificial Intelligence ## Cited by Papers of our library cite their works 365 times (of the 149,439 papers whose bibliographies we read); [59 citing papers with a page here →](https://md.research.elamur.ai/free/en/authors/pengjie-ren/cited-by/). Updated 2 November 2026