Jiaqing Xie

I am a first-year PhD student in Computer Science at Fudan University. I received my M.Sc. in Computer Science from ETH Zurich and my B.Eng. in Electronics and Computer Science from the University of Edinburgh, and in Summer 2020 I worked with Manolis Kellis at MIT. I am supervised by Yuqiang Li, Tianfan Fu, Yuxin Wang, Xipeng Qiu, and Jun Xia.

My research focuses on geometric transformers (KDD × 1), spectroscopic data mining (KDD × 3), vision-language models for scientific reasoning, and diffusion & flow matching.

ETH Zurich MIT University of Edinburgh Fudan University

Scholar  /  GitHub  /  Email

Email: 26113050148 [at] m.fudan [dot] edu [dot] cn

Jiaqing Xie

Representative Papers

GSF-χ: Global Stereochemical Fields for Chiral Graph Transformers GSF-χ: Global Stereochemical Fields for Chiral Graph Transformers
Jiaqing Xie, Yuxin Wang†, Xipeng Qiu†
arXiv preprint, 2026
arXiv / Code

TL;DR: Enantiomers share atoms, bonds, and pairwise distances yet behave differently in chiral environments, so molecular encoders must respect rotations without going blind to reflection. GSF-χ lets every stereogenic unit modulate all pairwise attention through a reflection-even phase field, while a handedness pseudoscalar χ reverses a Chiral-RoPE on latent query–key blocks; a C2 projection keeps ECD peak counts and positions mirror-even and peak signs mirror-odd. GSF-χ leads every central-ECD output and improves axial Rotation and Symbol by 12.6% and 7.9% over the strongest baseline.

Analytic-Walk Rotary Positional Encodings for Graphs Analytic-Walk Rotary Positional Encodings for Graphs
Jiaqing Xie, Yuxin Wang, Xipeng Qiu
arXiv preprint, 2026
arXiv / Code

TL;DR: Rotary position encodings make attention sensitive to relative position, but prior graph versions assign each node a rotation from spectral coordinates, so the rotary factor between two nodes cannot distinguish the routes connecting them. AW-RoPE places the rotations on edges and sums the transported features over all walks, so contributions along different routes can reinforce or cancel: an exact variant evaluates the complete sum by a differentiable linear solve, and a sparse variant truncates it at finite depth. Across five synthetic tasks both variants reduce nRMSE by 15–58% relative to the strongest baseline, and on real superpixel, peptide and OGB benchmarks the sparse recurrence attains the best mean on every dataset with Performer kernels and on twelve of thirteen datasets with GIN.

NMRTrans: Structure Elucidation from Experimental NMR Spectra via Set Transformers NMRTrans: Structure Elucidation from Experimental NMR Spectra via Set Transformers
Liujia Yang†, Zhuo Yang†, Jiaqing Xie†, Yubin Wang†, Ben Gao, Tianfan Fu, Xingjian Wei, Jiaxing Sun, Jiang Wu, Conghui He, Yuqiang Li, Qinying Gu
KDD, 2026
Paper / Code

TL;DR: Recent NMR structure-elucidation models rely heavily on large corpora of computed spectra and drop sharply on experimental measurements. We build NMRSpec, a large-scale corpus of experimental 1H and 13C spectra mined from chemical literature, and propose NMRTrans, which models spectra as unordered peak sets and aligns the model's inductive bias with the physical nature of NMR. To our knowledge NMRTrans is the first NMR Transformer trained solely on large-scale experimental spectra, improving Top-10 Accuracy over the strongest baseline by +17.82 points (61.15% vs. 43.33%).

R2-Seg: Training-Free OOD Medical Tumor Segmentation R²-Seg: Training-Free OOD Medical Tumor Segmentation via Anatomical Reasoning and Statistical Rejection
Shuaike Shen, Ke Liu, Jiaqing Xie, Shangde Gao, Chunhua Shen, Ge Liu, Mireia Crispin-Ortuzar, Shangqi Gao
CVPR, 2026  (Oral)
Paper / Code

TL;DR: Foundation models for medical image segmentation struggle under out-of-distribution shifts, often producing fragmented false positives on OOD tumors. R²-Seg is a training-free Reason-and-Reject framework: an LLM-guided anatomical reasoning planner localizes organ anchors and generates multi-scale ROIs, then two-sample statistical testing rejects candidates from a frozen foundation model (BiomedParse) that are not significantly different from normal tissue. On multi-center, multi-modal tumor segmentation benchmarks, R²-Seg substantially improves Dice, specificity, and sensitivity over strong baselines with no parameter updates.

MatVerse: A Foundation Model for Materials Science MatVerse: A Foundation Model for Materials Science
Xuanyu Zhu†, Qian Tan†, Bo Chen, Jiaqing Xie, Yang Han, Mei Wu, Xuanze Lin, Wanhao Liu, Yuchen Zhou, Shijie Wang, Biqing Qi, Shixiang Tang, Wenwei Zhang, Tianfan Fu, Kai Yu, Lu Chen, Yuqiang Li, Xin Chen
Technical Report, 2026

TL;DR: MatVerse is a materials foundation model built upon Intern-S2-Preview (35B-A3B) and specialized through large-scale materials-domain post-training on ~150K multimodal examples covering materials knowledge, scientific reasoning, quantitative problem solving, structural understanding, and multimodal scientific interpretation, constructed with teacher-guided reasoning distillation, scientific problem synthesis, consistency-based filtering, and retrieval-based multimodal data construction. Across OmniMatBench, MatSciBench, and MaCBench, MatVerse consistently improves over its base model, outperforming GPT-5.2 on MatSciBench (63.59% vs. 59.6%) while also improving inference efficiency on calculation-intensive problems.

Disagree to Accelerate: Closing the Loop on Diffusion Feature Forecasts Disagree to Accelerate: Closing the Loop on Diffusion Feature Forecasts
Yanchao Li, Jiaqing Xie, Ben Gao, Wanhao Liu, Yanbo Wang, T. Y. Tsui, Jinfei Liu, Yuqiang Li, Tianfan Fu
arXiv preprint, 2026
arXiv / Code

TL;DR: Training-free feature forecasting accelerates diffusion sampling by predicting features at skipped denoising steps, but open-loop caches trust the forecast in full at every skipped step. We show reliability can be observed from the cache itself: two forecasts agree where the feature trajectory is smooth and diverge where prediction turns hard, and their disagreement is a free runtime signal. RACER uses it as a training-free closed-loop controller that shrinks uncertain forecasts toward the last computed feature and, at the riskiest steps, refreshes the feature while repaying the cost by skipping a later one. At equal denoiser evaluations RACER improves the strongest open-loop baseline across SD3.5-Large, FLUX.1-dev, Wan2.1-14B, and HunyuanVideo on DrawBench, VBench, and COCO.

Benchmarking Positional Encodings for GNNs and Graph Transformers Benchmarking Positional Encodings for GNNs and Graph Transformers
Florian Grötschla, Jiaqing Xie, Roger Wattenhofer
KDD, 2026  (Datasets & Benchmarks)
arXiv / Code

TL;DR: Positional Encodings (PEs) are essential for injecting structural information into GNNs, particularly Graph Transformers, yet their empirical impact remains insufficiently understood. We introduce a unified benchmarking framework that decouples PEs from architectural choices, comparing 8 GNN and Transformer models, 9 PEs, and 10 synthetic and real-world datasets — over 500 model-PE-dataset configurations. Weisfeiler-Lehman distinguishability and other expressiveness proxies do not reliably predict downstream performance; highly expressive PEs can even degrade real-world tasks, while several simple, previously overlooked model-PE combinations match or outperform recent state-of-the-art methods.

NMRGym: A Comprehensive Benchmark for NMR Based Molecular Structure Elucidation NMRGym: A Comprehensive Benchmark for Nuclear Magnetic Resonance Based Molecular Structure Elucidation
Zheng Fang, Chen Yang, Hai-tao Yu, Haoming Luo, Haitao He, Jiaqing Xie, Zhuo Yang, Jun Xia
KDD, 2026
Paper / Code

TL;DR: Deep learning for NMR structure elucidation is impeded by reliance on synthetic datasets, which introduces domain shifts on real-world experimental spectra, and by the lack of standardized evaluation protocols. NMRGym is the largest and most comprehensive standardized benchmark from high-quality experimental NMR data to date: 269,999 unique molecules paired with high-fidelity 1H and 13C spectra, strict quality control, a scaffold-based split to prevent data leakage, and fine-grained peak-atom annotations, with an evaluation suite covering structure elucidation, functional group prediction, toxicity prediction, and spectral simulation.

SpectrumWorld: Artificial Intelligence Foundation for Spectroscopy SpectrumWorld: Artificial Intelligence Foundation for Spectroscopy
Zhuo Yang†, Jiaqing Xie†, Shuaike Shen, Daolang Wang, Yeyun Chen, Ben Gao, Shuzhou Sun, Biqing Qi, Dongzhan Zhou, Lei Bai, Linjiang Chen, Shufei Zhang, Qinying Gu, Jun Jiang, Tianfan Fu, Yuqiang Li
KDD, 2026
Paper / Code

TL;DR: Deep learning holds immense promise for spectroscopy, yet research and evaluation in this emerging field often lack standardized formulations. SpectrumLab is a unified platform that systematizes the field: a comprehensive Python library with data processing and evaluation tools and leaderboards, a SpectrumAnnotator module that generates high-quality benchmarks from limited seed data, and SpectrumBench, a multi-layered benchmark suite covering 14 spectroscopic tasks and over 10 spectrum types with spectra from over 1.2 million substances. Empirical studies with 18 cutting-edge multimodal LLMs reveal critical limitations of current approaches.

QCBench: Evaluating Large Language Models on Domain-Specific Quantitative Chemistry QCBench: Evaluating Large Language Models on Domain-Specific Quantitative Chemistry
Jiaqing Xie, Weida Wang, Ben Gao, Zhuo Yang, Haiyuan Wan, Shufei Zhang, Tianfan Fu, Yuqiang Li
Journal of Chemical Information and Modeling, 2025
DOI / Code

TL;DR: QCBench is a benchmark of 350 calculation-oriented chemistry questions spanning eight subfields — analytical, inorganic, organic, physical, polymer, and technical chemistry, biochemistry, and materials science — designed to test the domain-specific quantitative reasoning of large language models. Answers are scored with high-precision numerical tolerance and an answer-verification model, enabling systematic comparison across LLMs and chemistry categories.

DeepProtein: Deep Learning Library and Benchmark for Protein Sequence Learning DeepProtein: Deep Learning Library and Benchmark for Protein Sequence Learning
Jiaqing Xie, Tianfan Fu
Bioinformatics, 2025
arXiv / Code

TL;DR: A comprehensive and user-friendly deep learning library for protein-related tasks, with a benchmark evaluating CNNs, RNNs, transformers, and GNNs across protein function prediction, subcellular localization, protein-protein interaction, and structure prediction. We also introduce DeepProt-T5, a series of fine-tuned Prot-T5-based models that achieve state-of-the-art performance on four benchmark tasks while remaining competitive on six others.

Software

ChemClaw ChemClaw   GitHub stars GitHub forks
A public skills package for chemistry-focused AI workflows — a chemistry-native AI agent skill library, installable with a single command (npx skills add AI4Chem/ChemClaw).
GitHub

News

2026.10 Our MatVerse technical report is released. MatVerse is a materials foundation model built on Intern-S2-Preview and specialized through large-scale materials-domain post-training.
2026.09 I joined Shanghai Artificial Intelligence Laboratory and Fudan University as a PhD student.
2026.09 Two new preprints on arXiv: GSF-χ and AW-RoPE.
2026.08 Four papers accepted at KDD: NMRTrans, NMRGym, SpectrumWorld, and Benchmarking Positional Encodings.
2026.06 Two papers accepted at CVPR: R²-Seg (Oral) and PolyReal.
2026.05 New preprint on arXiv: OmniMatBench, a human-calibrated multimodal reasoning benchmark across 19 materials-science subfields.
2026.04 New preprint on arXiv: PolyReal, a benchmark for real-world polymer science workflows.
2026.02 New preprint on arXiv: NMRTrans, structure elucidation from experimental NMR spectra via set transformers.
2026.01 DeepResearch Arena accepted at AAAI. New preprint on arXiv: NMRGym.
2025.11 QCBench was published in the Journal of Chemical Information and Modeling.
2025.08 New preprint on arXiv: SpectrumWorld, an artificial intelligence foundation for spectroscopy.
2025.05 DeepProtein was published in Bioinformatics.

Academic Services

Reviewer: 2026 ICLR, ACL ARR, JCIM – 2025 ACL, CVPR, EMNLP, ICONIP, NeurIPS, JCIM – 2024 ACML, NeurIPS

Blog

Oct 2026 – 从近似高消到图学习:Laplacian 理论、可迁移的定理与 Graph DeltaNet 的接口 — 20 页笔记的展开导读:Schur 补与星形–团消元的动图演示、谱稀疏采样、可微求解的梯度公式, 以及哪些定理能迁移到多前驱 DAG Graph DeltaNet、哪些桥不存在。附 完整 PDF。

Oct 2026 – Reading Notes: Approximate Gaussian Elimination (Rasmus Kyng, Yale PhD 2017) — Cholesky by random sampling, the first nearly-linear solver for directed Laplacians, faster random spanning trees, and what this line of work offers graph learning and theory.

© 2026 Jiaqing Xie

Design adapted from Ryan Bahlous-Boldi × Jon Barron