Chen Xu

xuchen314 AT gmail.com




I am currently working at Alibaba-inc to develop recommendation systems for Taobao App. Before that, I obtained my PhD degree from PKU in 2018. I was very lucky to be co-supervised by Prof. Zhouchen Lin and Prof. Hongbin Zha.


  • Recommendation Systems
  • Optimization
  • Machine Learning


  • PhD in Machine Learning, 2013-2018

    Peking University

  • BSc in Electronic Engineering, 2009-2013

    University of Electronic Science and Technology of China

Curriculum Vitae



Search and Recommend Business Unit at Alibaba-inc

Jul 2019 – Present Beijing

Research on:

  • Recommendation Systems
  • Optimization
  • Machine Leanring


Search and Recommend Business Unit at Alibaba-inc

Jul 2017 – Oct 2017 Beijing

Research on:

  • Optimization

Publications @ZERO Lab

Alternating Multi-bit Quantization for Recurrent Neural Networks. ICLR, 2018.

We address the latency problem of RNN by quantizing the network, both weights and activations, into multiple binary codes {−1, +1}. We …

Robust Matrix Factorization by Majorization-Minimization. TPAMI, 2018.

We apply the Majorization Minimization technique to solve the problem OF L1 -norm based low rank matrix factorization, at each …

A Unified Convex Surrogate for the Schatten-p Norm. AAAI, 2017.

We show that for any p, p1, and p2 > 0 satisfying 1/p = 1/p1 + 1/p2, there is an equivalence between the Schatten-p norm of one …

Relaxed Majorization-Minimization for Non-smooth and Non-convex Optimization. AAAI, 2016.

We propose a new majorization-minimization (MM) method for non-smooth and non-convex programs, which is general enough to include the …


President Scholarship in 5 sucessive years