Working Papers

Uncertainty quantification for mixed membership in multilayer networks with degree heterogeneity using Gaussian variational inference
Fangzheng Xie, Hsin-Hsiung Huang
Technical Report
SANVI: A Fast Spectral-Assisted Network Variational Inference Method with an Extended Surrogate Likelihood Function
Dingbo Wu*, Fangzheng Xie
Technical Report
A Bayes factor function for high dimensional MANOVA using random projections
Roger S. Zoh, Omkar M. Khandpekar, Fangzheng Xie, Lan Xue, Suvo Chatterjee, David Allison, Carmen Tekwe
Submitted

Publications

Meta-Router: Bridging Gold-standard and Preference-based Evaluations in Large Language Model Routing
Yichi Zhang, Fangzheng Xie, Shu Yang, Chong Wu
The Fourteenth International Conference on Learning Representations, 2026.
Statistical inference of random graphs with a surrogate likelihood function
Dingbo Wu*, Fangzheng Xie
Journal of Machine Learning Research, in press, 2026+
Higher-Order Entrywise Eigenvectors Analysis of Low-Rank Random Matrices: Bias Correction, Edgeworth Expansion, and Bootstrap
Fangzheng Xie, Yichi Zhang
Annals of Statistics, 2025; 53 (4), 1667-1696
Bayesian Sparse Gaussian Mixture Model in High Dimensions
Dapeng Yao, Fangzheng Xie, Yanxun Xu
Journal of Machine Learning Research, accepted for publication, 2025+
Bias-Corrected Joint Spectral Embedding for Multilayer Networks with Invariant Subspace: Entrywise Eigenvector Perturbation and Inference
Fangzheng Xie
IEEE Transactions on Information Theory, 2024; 70 (12), 9036-9083
Spectral Norm Posterior Contraction in Bayesian Sparse Spiked Covariance Matrix Model
Fangzheng Xie
Electronic Journal of Statistics, 2024; 18 (2), 5198-5257
An Eigenvector-Assisted Estimation Framework for Signal-Plus-Noise Matrix Models
Fangzheng Xie, Dingbo Wu
Biometrika, 2024; 111 (2), 661-676
Entrywise limit theorems for eigenvectors of signal-plus-noise matrix models with weak signals
Fangzheng Xie
Bernoulli, 2024; 30 (1), 388-418
Euclidean Representation of Low-Rank Matrices and Its Geometric Properties
Fangzheng Xie
SIAM Journal on Matrix Analysis and Applications, 2023; 44 (2), 822-866
Efficient Estimation for Random Dot Product Graphs via a One-step Procedure
Fangzheng Xie, Yanxun Xu
Journal of the American Statistical Association, 2023; 118 (541), 651-664
A Theoretical Framework of the Scaled Gaussian Stochastic Process in Prediction and Calibration
Mengyang Gu, Fangzheng Xie, Long Wang
SIAM/ASA Journal of Uncertainty Quantification, 2022; 10 (4): 1435-1460
Simultaneous Learning the Dimension and Parameter of a Statistical Model with Big Data
Long Wang, Fangzheng Xie, Yanxun Xu
Statistics in Biosciences, 2023; 15; 583-607
Bayesian Sparse Spiked Covariance Model with a Continuous Matrix Shrinkage Prior
Fangzheng Xie, Joshua Cape, Carey E. Priebe, and Yanxun Xu
Bayesian Analysis, 2022; 17 (4): 1193-1217
Bayesian Projected Calibration of Computer Models
Fangzheng Xie, Yanxun Xu
Journal of the American Statistical Association, 2022; 116 (536): 1965-1982
BAREB: A Bayesian repulsive biclustering model for periodontal data
Yuliang Li, Dipankar Bandyopadhyay, Fangzheng Xie, and Yanxun Xu
Statistics in Medicine, 2020; 39 (16): 2139-2151
Optimal Bayesian Estimation for Random Dot Product Graphs
Fangzheng Xie, Yanxun Xu
Biometrika, 2020, 107 (4): 875-889
Bayesian Repulsive Gaussian Mixture Model
Fangzheng Xie, Yanxun Xu
Journal of the American Statistical Association, 2020; 115 (529): 187-203
Adaptive Bayesian Nonparametric Regression using Kernel Mixture of Polynomials with Application to Partial Linear Model
Fangzheng Xie, Yanxun Xu
Bayesian Analysis, 2020; 15 (1): 159-186
Rates of Contraction with respect to L2-distance for Bayesian Nonparametric Regression
Fangzheng Xie, Wei Jin, Yanxun Xu
Electronic Journal of Statistics, 2019; 13 (2): 3485-3512
BayCount: A Bayesian Decomposition Method for Inferring Tumor Heterogeneity using RNA-Seq Counts
Fangzheng Xie, Mingyuan Zhou, Yanxun Xu
Annals of Applied Statistics, 2018; 12 (3): 1605-1627
*: Student first author

Last updated: 07/2026