publications

2026

1. ICLR

   Flow-Disentangled Feature Importance

   Xingshu Chen^*, Yifeng Guo^*, and Jin-Hong Du

   International Conference on Learning Representations (ICLR), 2026

   *Equal contribution

   Bib

   @article{guo2026flow,
     title = {Flow-Disentangled Feature Importance},
     author = {Chen, Xingshu and Guo, Yifeng and Du, Jin-Hong},
     journal = {International Conference on Learning Representations (ICLR)},
     year = {2026},
     note = {*Equal contribution}
   }

2. STAI-X

   Beyond Importance: Interchange-Sobol Sensitivity Reveals Task-Specific Content Channels in Transformer Components

   Yifeng Guo, Jin-Hong Du, and Xiang Chen

   STAI-X (Harvard University), 2026

   Bib

   @article{guo2026beyond,
     title = {Beyond Importance: Interchange-{S}obol Sensitivity Reveals Task-Specific Content Channels in Transformer Components},
     author = {Guo, Yifeng and Du, Jin-Hong and Chen, Xiang},
     journal = {STAI-X (Harvard University)},
     year = {2026}
   }

3. Sinica

   HAR-Itô Models and High-dimensional HAR Modeling for High-frequency Data

   Huiling Yuan, Kexin Lu, Yifeng Guo, and 2 more authors

   Statistica Sinica, 2026

   Accepted

   Bib

   @article{yuan2024harito,
     title = {{HAR-It\^o} Models and High-dimensional {HAR} Modeling for High-frequency Data},
     author = {Yuan, Huiling and Lu, Kexin and Guo, Yifeng and Li, Lan and Li, Guodong},
     journal = {Statistica Sinica},
     year = {2026},
     note = {Accepted}
   }

4. SII

   Conditional Value-at-Risk Portfolio Optimization in High Dimensions

   Yifeng Guo, Jin-Hong Du, and Xueqin Wang

   Statistics and Its Interface, 2026

   DOI Bib HTML

   @article{guo2026cvar,
     title = {Conditional Value-at-Risk Portfolio Optimization in High Dimensions},
     author = {Guo, Yifeng and Du, Jin-Hong and Wang, Xueqin},
     journal = {Statistics and Its Interface},
     volume = {19},
     number = {3},
     pages = {409--422},
     year = {2026},
     doi = {10.4310/SII.260602011232},
   }

5. Dynamic Functional Factor Model with Multiple Breaks

   Yifeng Guo^*, Yan Chen^*, Xueqin Wang, and 1 more author

   Preprint, 2026

   Under Review. *Equal contribution

   Bib

   @article{guo2026dynamic,
     title = {Dynamic Functional Factor Model with Multiple Breaks},
     author = {Guo, Yifeng and Chen, Yan and Wang, Xueqin and Li, Guodong},
     journal = {Preprint},
     year = {2026},
     note = {Under Review. *Equal contribution}
   }

6. What Do Sparse Autoencoder Feature Discovery Scores Identify? From Activations to Interventions

   Yifeng Guo, Yanran Li, and Xiang Chen

   arXiv preprint, 2026

   Under Review

   arXiv Bib

   @article{guo2026sae,
     title = {What Do Sparse Autoencoder Feature Discovery Scores Identify? From Activations to Interventions},
     author = {Guo, Yifeng and Li, Yanran and Chen, Xiang},
     journal = {arXiv preprint},
     year = {2026},
     note = {Under Review}
   }

7. IEEE JBHI

   AI-Driven Prediction of Cancer Pain Episodes: A Hybrid Decision Support Approach

   Yipeng Zhuang^*, Yifeng Guo^*, Yuewen Li^*, and 8 more authors

   IEEE Journal of Biomedical and Health Informatics, 2026

   Accepted. *Equal contribution

   DOI Bib HTML

   @article{zhuang2026cancer,
     title = {{AI}-Driven Prediction of Cancer Pain Episodes: A Hybrid Decision Support Approach},
     author = {Zhuang, Yipeng and Guo, Yifeng and Li, Yuewen and Wu, Yuheng and Song, Tingting and Wang, Zhiyong and Liang, Yiteng and Zhou, Kunzhong and Wang, Weifang and Yu, Junxuan and Zhuang, Li},
     journal = {IEEE Journal of Biomedical and Health Informatics},
     year = {2026},
     doi = {10.1109/JBHI.2026.3694585},
     note = {Accepted. *Equal contribution}
   }

8. HCII

   Evidence-Grounded Interactive AI for Adaptive Medical Education

   Yipeng Zhuang^*, Yifeng Guo^*, Longfei Ju^*, and 3 more authors

   In International Conference on Human-Computer Interaction (HCII), 2026

   *Equal contribution

   Bib

   @inproceedings{zhuang2026grounded,
     title = {Evidence-Grounded Interactive {AI} for Adaptive Medical Education},
     author = {Zhuang, Yipeng and Guo, Yifeng and Ju, Longfei and Xu, Jieying and Zhuang, Li and Yu, Philip},
     booktitle = {International Conference on Human-Computer Interaction (HCII)},
     year = {2026},
     note = {*Equal contribution}
   }

9. Constrained Clinical Agents for Cancer Pain Decision Support in Real-World Inpatient Care

   Yifeng Guo^*, Yipeng Zhuang^*, Ke Yin, and 9 more authors

   Preprint, 2026

   Under Review. *Equal contribution

   Bib

   @article{guo2026constrained,
     title = {Constrained Clinical Agents for Cancer Pain Decision Support in Real-World Inpatient Care},
     author = {Guo, Yifeng and Zhuang, Yipeng and Yin, Ke and Lin, Rui and Ju, Longfei and Jiang, Yafei and Wang, Weifang and Liang, Yiteng and Zhou, Kunzhong and Song, Tingting and Saurav, Poudel and Zhuang, Li},
     journal = {Preprint},
     year = {2026},
     note = {Under Review. *Equal contribution}
   }

2025

1. Frontiers

   Tobacco Cultivation in Yunnan: An Integrated Analysis of Economic Trends and Diversification

   Jie Song, Jiang Wu, Xiangyang Li, and 10 more authors

   Frontiers in Sustainable Food Systems, 2025

   Bib

   @article{song2025tobacco,
     title = {Tobacco Cultivation in {Y}unnan: An Integrated Analysis of Economic Trends and Diversification},
     author = {Song, Jie and Wu, Jiang and Li, Xiangyang and Ning, Qingong and Liu, Wei and Liu, Zefan and Yuan, Guoyi and Huang, Haichang and Guo, Yifeng and Zhuang, Yipeng and Bai, Yuxiang and Ge, Wang and Zi, Dingchun},
     journal = {Frontiers in Sustainable Food Systems},
     volume = {9},
     pages = {1622916},
     year = {2025}
   }

2. Influence of Implant-Membrane Angle on Non-Grafting Osteotome Sinus Floor Elevation with Simultaneous Implant Placement: A 6-Year Retrospective Study

   Yi Yu^*, Yi He^*, Yifeng Guo^*, and 5 more authors

   Preprint, 2025

   Under Review. *Equal contribution

   Bib

   @article{yu2025implant,
     title = {Influence of Implant-Membrane Angle on Non-Grafting Osteotome Sinus Floor Elevation with Simultaneous Implant Placement: A 6-Year Retrospective Study},
     author = {Yu, Yi and He, Yi and Guo, Yifeng and Deng, Jiali and Shen, Jiaqi and Deng, Feilong and Xu, Ruogu and Zhang, Zhengchuan},
     journal = {Preprint},
     year = {2025},
     note = {Under Review. *Equal contribution}
   }

3. Evaluating the Capacity of LLMs in Assisting Proposal Review: A Comparative Study

   Kaiwen Wang^*, Hao Fu^*, Yifeng Guo^*, and 11 more authors

   Preprint, 2025

   Under Review. *Equal contribution

   Bib

   @article{wang2025llm,
     title = {Evaluating the Capacity of {LLMs} in Assisting Proposal Review: A Comparative Study},
     author = {Wang, Kaiwen and Fu, Hao and Guo, Yifeng and Li, Xuexin and Du, Jiayang and Ishrat, Tauheed and Kovesdy, Csaba P. and Liao, Francesca-Fang and Liu-Smith, Feng and Miranda, Susan and Chen, Na and Sakata, Kazuko and Sun, Zhongjie and Gu, Weikuan},
     journal = {Preprint},
     year = {2025},
     note = {Under Review. *Equal contribution}
   }

2023

1. JASA

   High Dimensional Portfolio Selection with Cardinality Constraints

   Jin-Hong Du^*, Yifeng Guo^*, and Xueqin Wang

   Journal of the American Statistical Association, 2023

   *Equal contribution

   Bib

   @article{du2023high,
     title = {High Dimensional Portfolio Selection with Cardinality Constraints},
     author = {Du, Jin-Hong and Guo, Yifeng and Wang, Xueqin},
     journal = {Journal of the American Statistical Association},
     volume = {118},
     number = {542},
     pages = {779--791},
     year = {2023},
     note = {*Equal contribution}
   }

2020

1. Explainable Recommendation Systems by Generalized Additive Models with Manifest and Latent Interactions

   Yifeng Guo, Yu Su, Zebin Yang, and 1 more author

   arXiv preprint, 2020

   Bib

   @article{guo2020explainable,
     title = {Explainable Recommendation Systems by Generalized Additive Models with Manifest and Latent Interactions},
     author = {Guo, Yifeng and Su, Yu and Yang, Zebin and Zhang, Aijun},
     journal = {arXiv preprint},
     year = {2020}
   }

2018

1. Robust Log-Optimal Strategy with Reinforcement Learning

   Yifeng Guo, Xingyu Fu, Yuyan Shi, and 1 more author

   arXiv preprint, 2018

   Bib

   @article{guo2018robust,
     title = {Robust Log-Optimal Strategy with Reinforcement Learning},
     author = {Guo, Yifeng and Fu, Xingyu and Shi, Yuyan and Liu, Mingwen},
     journal = {arXiv preprint},
     year = {2018}
   }

2. A Machine Learning Framework for Stock Selection

   Xingyu Fu, Jin-Hong Du, Yifeng Guo, and 3 more authors

   arXiv preprint, 2018

   Bib

   @article{fu2018machine,
     title = {A Machine Learning Framework for Stock Selection},
     author = {Fu, Xingyu and Du, Jin-Hong and Guo, Yifeng and Liu, Mingwen and Dong, Tao and Duan, Xiuwen},
     journal = {arXiv preprint},
     year = {2018}
   }