Search Results for author: Xiaojun Mao

Found 17 papers, 0 papers with code

Mixed Matrix Completion in Complex Survey Sampling under Heterogeneous Missingness

no code implementations6 Feb 2024 Xiaojun Mao, Hengfang Wang, Zhonglei Wang, Shu Yang

Modern surveys with large sample sizes and growing mixed-type questionnaires require robust and scalable analysis methods.

Matrix Completion Nutrition +1

Efficient Sparse Least Absolute Deviation Regression with Differential Privacy

no code implementations2 Jan 2024 Weidong Liu, Xiaojun Mao, Xiaofei Zhang, Xin Zhang

To fast solve the non-smooth loss under a given privacy budget, we develop a Fast Robust And Privacy-Preserving Estimation (FRAPPE) algorithm for least absolute deviation regression.

Privacy Preserving regression

Distributed Semi-Supervised Sparse Statistical Inference

no code implementations17 Jun 2023 Jiyuan Tu, Weidong Liu, Xiaojun Mao, Mingyue Xu

The debiased estimator is a crucial tool in statistical inference for high-dimensional model parameters.

Fast and Robust Sparsity Learning over Networks: A Decentralized Surrogate Median Regression Approach

no code implementations11 Feb 2022 Weidong Liu, Xiaojun Mao, Xin Zhang

Decentralized sparsity learning has attracted a significant amount of attention recently due to its rapidly growing applications.

regression

Nonparametric Feature Selection by Random Forests and Deep Neural Networks

no code implementations18 Jan 2022 Xiaojun Mao, Liuhua Peng, Zhonglei Wang

Random forests are a widely used machine learning algorithm, but their computational efficiency is undermined when applied to large-scale datasets with numerous instances and useless features.

BIG-bench Machine Learning Computational Efficiency +1

One-Bit Matrix Completion with Differential Privacy

no code implementations2 Oct 2021 Zhengpin Li, Zheng Wei, Zengfeng Huang, Xiaojun Mao, Jian Wang

In this paper, we propose a unified framework for ensuring a strong privacy guarantee of one-bit matrix completion with DP.

Collaborative Filtering Matrix Completion +2

Applying Differential Privacy to Tensor Completion

no code implementations1 Oct 2021 Zheng Wei, Zhengpin Li, Xiaojun Mao, Jian Wang

Tensor completion aims at filling the missing or unobserved entries based on partially observed tensors.

Tensor Decomposition

SAM: A Self-adaptive Attention Module for Context-Aware Recommendation System

no code implementations1 Oct 2021 Jiabin Liu, Zheng Wei, Zhengpin Li, Xiaojun Mao, Jian Wang, Zhongyu Wei, Qi Zhang

In this work, we propose a novel and general self-adaptive module, the Self-adaptive Attention Module (SAM), which adjusts the selection bias by capturing contextual information based on its representation.

Recommendation Systems Representation Learning +1

Matrix Completion with Model-free Weighting

no code implementations9 Jun 2021 Jiayi Wang, Raymond K. W. Wong, Xiaojun Mao, Kwun Chuen Gary Chan

In particular, the proposed method achieves a stronger guarantee than existing work in terms of the scaling with respect to the observation probabilities, under asymptotically heterogeneous missing settings (where entry-wise observation probabilities can be of different orders).

Matrix Completion

Variance Reduced Median-of-Means Estimator for Byzantine-Robust Distributed Inference

no code implementations4 Mar 2021 Jiyuan Tu, Weidong Liu, Xiaojun Mao, Xi Chen

Based on the proposed VRMOM estimator, we develop a general distributed inference algorithm that is robust against Byzantine failures.

Computational Efficiency

Median Matrix Completion: from Embarrassment to Optimality

no code implementations ICML 2020 Weidong Liu, Xiaojun Mao, Raymond K. W. Wong

In this paper, we consider matrix completion with absolute deviation loss and obtain an estimator of the median matrix.

Matrix Completion

Distributed High-dimensional Regression Under a Quantile Loss Function

no code implementations13 Jun 2019 Xi Chen, Weidong Liu, Xiaojun Mao, Zhuoyi Yang

This paper studies distributed estimation and support recovery for high-dimensional linear regression model with heavy-tailed noise.

regression Vocal Bursts Intensity Prediction

Matrix Completion under Low-Rank Missing Mechanism

no code implementations19 Dec 2018 Xiaojun Mao, Raymond K. W. Wong, Song Xi Chen

Although missing structure is a key component to any missing data problems, existing matrix completion methods often assume a simple uniform missing mechanism.

Matrix Completion

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