--- title: "Lechen Zhang — author profile and papers — Elamur Research" description: "Lechen Zhang, University of Helsinki: 3 papers on Elamur Research (2025–2026), h-index 7 — affiliations, topics, co-authors and who cites…" canonical: "https://research.elamur.ai/free/en/authors/lechen-zhang/" --- [Elamur Research](https://md.research.elamur.ai/free/en/) · [this page in HTML](https://research.elamur.ai/free/en/authors/lechen-zhang/) [home](https://md.research.elamur.ai/free/en/) / [authors](https://md.research.elamur.ai/free/en/authors/) / Lechen Zhang # Lechen Zhang Lechen Zhang has 3 papers in our library, in 2025–2026, most of them on [Language models & pretraining](https://md.research.elamur.ai/free/en/topics/language-models/), [Evaluation & benchmarks](https://md.research.elamur.ai/free/en/topics/evaluation-benchmarks/), [Reasoning](https://md.research.elamur.ai/free/en/topics/reasoning/); often with [Lu Wang](https://md.research.elamur.ai/free/en/authors/lu-wang/), [Farima Fatahi Bayat](https://md.research.elamur.ai/free/en/authors/farima-fatahi-bayat/), [Sheza Munir](https://md.research.elamur.ai/free/en/authors/sheza-munir/). 3 papers in our library · 2025–2026 [OpenAlex](https://openalex.org/A5079952957) · [ORCID](https://orcid.org/0000-0002-4216-4463) · [**h-index 7**](https://openalex.org/authors/A5079952957) · [30 works](https://openalex.org/works?filter=author.id:A5079952957) · [869 citations](https://openalex.org/works?filter=author.id:A5079952957&sort=cited_by_count:desc) OpenAlex, 2026-10-14 [📄 3 works in our library](https://md.research.elamur.ai/free/en/authors/lechen-zhang/#papers) · [🔗 Cited 24 times in our library](https://md.research.elamur.ai/free/en/authors/lechen-zhang/cited-by/) · [⭐ Paper Stars ranking: #8506](https://md.research.elamur.ai/free/en/paper-stars/page/86/#star-8506) 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=Lechen+Zhang) · [Semantic Scholar](https://www.semanticscholar.org/search?q=Lechen+Zhang) · [dblp](https://dblp.org/search?q=Lechen+Zhang) · [ACL Anthology](https://aclanthology.org/search/?q=Lechen+Zhang) ## Affiliations [🎓**University of Michigan** Ann Arbor · United States 2024–2026 · 9 papers*current*](https://md.research.elamur.ai/free/en/universities/university-of-michigan/) · [🎓**University of Helsinki** Helsinki · Finland 2025–2026 · 4 papers*current*](https://md.research.elamur.ai/free/en/universities/university-of-helsinki/) · [🎓**Stockholm University** Stockholm · Sweden 2018–2021 · 9 papersEmployment 2018–2021 · Doctoral Student, Department of Computer and Systems Sciences](https://md.research.elamur.ai/free/en/universities/stockholm-university/) From the bylines of their papers (OpenAlex, 2026-10-14), ORCID and Wikidata; institutions on papers are matched by machine. 2 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 7 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/) · [Computer Vision and Pattern Recognition · 2 works](https://md.research.elamur.ai/free/en/shelves/computer-science/computer-vision-and-pattern-recognition/) · [Social Sciences · 1 work](https://md.research.elamur.ai/free/en/shelves/social-sciences/) · [Sociology and Political Science · 1 work](https://md.research.elamur.ai/free/en/shelves/social-sciences/sociology-and-political-science/) 🧭 Topics 3 Research subjects and languages the work is about.[Evaluation & benchmarks · 1 work](https://md.research.elamur.ai/free/en/topics/evaluation-benchmarks/) · [Language models & pretraining · 1 work](https://md.research.elamur.ai/free/en/topics/language-models/) · [Reasoning · 1 work](https://md.research.elamur.ai/free/en/topics/reasoning/) ## Works by year ### 2020s [**2026** 1 paper](https://md.research.elamur.ai/free/en/authors/lechen-zhang/year/2026/) · [**2025** 2 papers](https://md.research.elamur.ai/free/en/authors/lechen-zhang/year/2025/) ## Papers The most cited first (OpenAlex and our library). 1. **[FactBench: A Dynamic Benchmark for In-the-Wild Language Model Factuality Evaluation](https://md.research.elamur.ai/free/en/papers/bayat-2025-factbench-dynamic-benchmark-wild-language/)** *(2025 · 16 citations)* Existing long-form factuality benchmarks are fixed snapshots, which exposes them to data contamination. They also cover narrow scenarios, such as biographies or LM-written questions, rather than what real users ask. The authors address this by mining in-the-wild prompts from LMSYS-Chat-1M. They cluster the prompts… 2. **[VeriFact: Enhancing Long-Form Factuality Evaluation with Refined Fact Extraction and Reference Facts](https://md.research.elamur.ai/free/en/papers/liu-2025-verifact-enhancing-long-form-factuality/)** *(2025 · 11 citations)* Judging whether long LLM answers are factually correct is hard because individual claims often depend on context spread across several sentences. 3. **[Logit Arithmetic Elicits Long Reasoning Capabilities Without Training](https://md.research.elamur.ai/free/en/papers/zhang-2026-logit-arithmetic-elicits-long-reasoning/)** *(2026 · 2 citations)* Large reasoning models acquire long chain-of-thought behaviours, such as backtracking and self-checking, through costly post-training. ## Co-authors here 8 co-authors with a page, the most papers together first. - [Lu Wang](https://md.research.elamur.ai/free/en/authors/lu-wang/) ×3 - [Farima Fatahi Bayat](https://md.research.elamur.ai/free/en/authors/farima-fatahi-bayat/) ×2 - [Sheza Munir](https://md.research.elamur.ai/free/en/authors/sheza-munir/) ×2 - [Xin Liu](https://md.research.elamur.ai/free/en/authors/xin-liu/) ×2 - [Muhammad Khalifa](https://md.research.elamur.ai/free/en/authors/muhammad-khalifa/) - [Xinliang Frederick Zhang](https://md.research.elamur.ai/free/en/authors/xinliang-frederick-zhang/) - [Yiyang Gu](https://md.research.elamur.ai/free/en/authors/yiyang-gu/) - [Yunxiang Zhang](https://md.research.elamur.ai/free/en/authors/yunxiang-zhang/) ## 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/): [ACL 2025](https://md.research.elamur.ai/free/en/venues/acl/2025/) - [Conference on Empirical Methods in Natural Language Processing (EMNLP)](https://md.research.elamur.ai/free/en/venues/emnlp/): [EMNLP 2025](https://md.research.elamur.ai/free/en/venues/emnlp/2025/) - [Findings of the Association for Computational Linguistics](https://md.research.elamur.ai/free/en/venues/findings/): [Findings of the Association for Computational Linguistics 2026](https://md.research.elamur.ai/free/en/venues/findings/2026/) ## Cited by Papers of our library cite their works 24 times (of the 149,439 papers whose bibliographies we read); [9 citing papers with a page here →](https://md.research.elamur.ai/free/en/authors/lechen-zhang/cited-by/). Updated 31 October 2026