Research



Scholarly Publications:


    Preprints (Double-blind submissions are not listed)

  1. HQ Cai, Longxiu Huang, Xiliang Lu, and Juntao You. Accelerating Ill-conditioned Hankel Matrix Recovery via Structured Newton-like Descent. arXiv GitHub
  2. Bowen Su, Juntao You, HQ Cai, and Longxiu Huang. Guaranteed Sampling Flexibility for Low-tubal-rank Tensor Completion. arXiv
  3. Bumsu Kim, Daniel Mckenzie, HQ Cai, and Wotao Yin. Curvature-Aware Derivative-Free Optimization. arXiv GitHub

  4. Journal and Selected Conference Papers

  5. Xue Wang, Tian Zhou, Jianqing Zhu, Jialin Liu, Kun Yuan, Tao Yao, Wotao Yin, Rong Jin, and HQ Cai. S3Attention: Improving Long Sequence Attention with Smoothed Skeleton Sketching, IEEE Journal of Selected Topics in Signal Processing (JSTSP), to appear.

  6. Xinyu Chen, Zhanhong Cheng, HQ Cai, Nicolas Saunier, and Lijun Sun. Laplacian Convolutional Representation for Traffic Time Series Imputation, IEEE Transactions on Knowledge and Data Engineering (TKDE), to appear.

  7. HQ Cai, Zehan Chao, Longxiu Huang, and Deanna Needell. Robust Tensor CUR Decompositions: Rapid Low-Tucker-Rank Tensor Recovery with Sparse Corruption, SIAM Journal on Imaging Sciences (SIIMS), 17(1): 225–247, 2024. arXiv GitHub BibTEX

  8. Jialin Liu, Xiaohan Chen, Zhangyang Wang, Wotao Yin, and HQ Cai. Towards Constituting Mathematical Structures for Learning to Optimize, In International Conference on Machine Learning (ICML), 2023. arXiv GitHub BibTEX Poster

  9. HQ Cai, Longxiu Huang, Pengyu Li, and Deanna Needell. Matrix Completion with Cross-Concentrated Sampling: Bridging Uniform Sampling and CUR Sampling, IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI), 45(8): 10100–10113, 2023. arXiv GitHub BibTEX

  10. HQ Cai, Jian-Feng Cai, and Juntao You. Structured Gradient Descent for Fast Robust Low-Rank Hankel Matrix Completion, SIAM Journal on Scientific Computing (SISC), 45(3): A1172–A1198, 2023. arXiv GitHub BibTEX

  11. HQ Cai, Daniel Mckenzie, Wotao Yin, and Zhenliang Zhang. A One-Bit, Comparison-Based Gradient Estimator, Applied and Computational Harmonic Analysis (ACHA), 60: 242–266, 2022. arXiv GitHub BibTEX

  12. HQ Cai, Daniel Mckenzie, Wotao Yin, and Zhenliang Zhang. Zeroth-Order Regularized Optimization (ZORO): Approximately Sparse Gradients and Adaptive Sampling, SIAM Journal on Optimization (SIOPT), 32(2): 687–714, 2022. arXiv GitHub BibTEX

  13. HQ Cai, Jialin Liu, and Wotao Yin. Learned Robust PCA: A Scalable Deep Unfolding Approach for High-Dimensional Outlier Detection. In Advances in Neural Information Processing Systems (NeruIPS), 2021. arXiv GitHub BibTEX Poster

  14. HQ Cai, Yuchen Lou, Daniel Mckenzie, and Wotao Yin. A Zeroth-Order Block Coordinate Descent Algorithm for Huge-Scale Black-Box Optimization. In International Conference on Machine Learning (ICML), 2021. arXiv GitHub BibTEX Poster

  15. HQ Cai, Keaton Hamm, Longxiu Huang, and Deanna Needell. Mode-wise Tensor Decompositions: Multi-dimensional Generalizations of CUR Decompositions. Journal of Machine Learning Research (JMLR), 22(185): 1–36, 2021. arXiv GitHub BibTEX

  16. HQ Cai, Keaton Hamm, Longxiu Huang, and Deanna Needell. Robust CUR Decomposition: Theory and Imaging Applications. SIAM Journal on Imaging Sciences (SIIMS), 14(4): 1472–1503, 2021. arXiv BibTEX

  17. HQ Cai, Jian-Feng Cai, Tianming Wang, and Guojian Yin. Accelerated Structured Alternating Projections for Robust Spectrally Sparse Signal Recovery. IEEE Transactions on Signal Processing (TSP), 69: 809–821, 2021. arXiv GitHub BibTEX

  18. HQ Cai, Keaton Hamm, Longxiu Huang, Jiaqi Li, and Tao Wang. Rapid Robust Principal Component Analysis: CUR Accelerated Inexact Low Rank Estimation. IEEE Signal Processing Letters (SPL), 28: 116–120, 2020. arXiv GitHub BibTEX

  19. HQ Cai, Jian-Feng Cai, and Ke Wei. Accelerated Alternating Projections for Robust Principal Component Analysis. Journal of Machine Learning Research (JMLR), 20(1): 685–717, 2019. arXiv GitHub BibTEX Poster Demo

  20. Other Referred Conference and Workshop Papers

  21. HQ Cai, Longxiu Huang, Chandra Kundu, and Bowen Su. On the Robustness of Cross-Concentrated Sampling for Matrix Completion. In Conference of Information Sciences and Systems (CISS), 2024. arXiv BibTEX

  22. Chandler Smith, Samuel Lichtenberg, HQ Cai, and Abiy Tasissa. Riemannian Optimization for Euclidean Distance Geometry. In Conference on Neural Information Processing Systems (NeurIPS) Workshops, 2023. BibTEX Poster

  23. Zheng Tan, Longxiu Huang, HQ Cai, and Yifei Lou. Non-convex Approaches for Low-Rank Tensor Completion under Tubal Sampling. In International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2023. arXiv BibTEX Poster

  24. Keaton Hamm, Mohamed Meskini, and HQ Cai. Riemannian CUR Decompositions for Robust Principal Component Analysis. In International Conference on Machine Learning (ICML) Workshops, 2022. arXiv BibTEX Poster

  25. HQ Cai, Zehan Chao, Longxiu Huang, and Deanna Needell. Fast Robust Tensor Principal Component Analysis via Fiber CUR Decomposition. In International Conference on Computer Vision (ICCV) Workshops, 2021. arXiv GitHub BibTEX

  26. Technical Reports

  27. Dylan King, Caroline Hills, Michael Kielstra, and Matt Torrence. Parallel Time Integration for Constrained Optimization. Lawrence Livermore National Lab, Report No. LLNL-SR-822456, 2020. Academic Mentor: HQ Cai. Sponsoring Mentors: Rob Falgout, Jeff Hittinger, and Cosmin Petra. PDF

  28. Elijah Gross-Sable, Jacky Lee, Xia Li, Tyler Sam, and Nate Sands. Trained to Kill: Analyzing Homicide Data in Los Angeles County. UCLA Computational and Applied Mathematics REU, Final Report for LA Homicide Narratives, 2019. Principal Investigators: Andrea Bertozzi and Jeffrey Brantingham. Academic Mentors: Michael Lindstrom and HQ Cai. PDF

Editorship: