Pengsheng Ji

Associate Professor
Graduate Coordinator

Contact Info

Email:
psji@uga.edu
Office:
Room 455, Brooks Hall (310 Herty Dr.)
Phone Number:
706-542-8232

Education

  • PhD, Statistics, Cornell University
  • MS, Statistics, Nankai University
  • BS, Mathematics, Nankai University

Awards

  • M. G. Michael Award, University of Georgia, 2016
  • Teaching Academy Fellow, University of Georgia, 2014
  • Provost Summer Research Grant, University of Georgia, 2014

Research Interests

  • Social Networks
  • Machine Learning
  • Rare and Weak Signals in Big Data
  • Quantitative Evaluation of Academic Research
  • Variable/Feature Selection

Selected Publications

  1. Jiang, X., Ji, P. and Li, S. (2019). CensNet: Convolution with Edge-Node Switching in Graph Neural Networks.  International Joint Conference on Artificial Intelligence (IJCAI).  Full text.
  2. Ji, P. and Nussbaum, M. (2017). Sharp minimax adaptation over Sobolev ellipsoids in nonparametric testing.  Electronic Journal of Statististics, Vol. 11, No. 2, 4515-4562. Full text at Euclid
  3. Ji, P. and Jin, J. (2016). Coauthorship and Citation Networks for Statisticians. Annals of Applied Statistics with discussions,  Vol. 10, No. 4, 1779-1812. Presented in the AOAS Invited Lecture at the Joint Statistical Meetings (JSM) 2016 in Chicago.  Download the main paper, discussions (#1, #2, #3, #4, #5, #6) and rejoinder.  Download data set and computer code.
  4. Ji, P. and Zhao, Z. (2014). Rate optimal multiple testing procedure in high dimensional regression. Full text at arXiv.
  5. Ji, P. and Jin, J. (2012). UPS Delivers Optimal Phase Diagram in High Dimensional Variable Selection. Annals of Statistics Vol. 40, No. 1, 73-103. Full text at Euclid, Matlab code, and the R package ScreenClean.

 

Research Areas:
Machine Learning

Events featuring Pengsheng Ji


January 26

Pengsheng Ji

Consider a linear model Y = X + z, z N(0; In). Here, X = Xn;p, where both p and n are large, but p > n. We model the rows of X as i.i.d. samples from N(0; 1 n ), where is a pp correlation matrix, which is unknown to us but is presumably sparse. The vector is also unknown but has relatively few nonzero coordinates, and we are interested in identifying these…


October 2

Pengsheng Ji

We collect the coauthor and citation data for all research papers published in four of the top journals in statistics between 2003 and 2012, analyze the data from several different perspectives (e.g., patterns, trends, community structures) and present an array of interesting findings. (1) Both the average numbers of papers per author published in these journals…

Articles Featuring Pengsheng Ji


Congratulations Dan Hall, Abhyuday Mandal, Cheolwoo Park, Pengsheng Ji and Wenxuan Zhong

Monday, March 5, 2018 - 4:32pm

The Department of Statistics congratulates Dan Hall, Abhyuday Mandal, Cheolwoo Park, and Wenxuan Zhong on their recent promotion to the rank of Full Professor and Pengsheng Ji on his promotion to the rank of Associate Professor with tenure. This is an…


Dr. Pengsheng Ji Publishes in AOAS

Tuesday, March 7, 2017 - 7:58am

Dr. Pengsheng Ji Published a Discussion Paper on Statistician Coauthorship and Citation Networks in the Annals of Applied Statistics.


Pengsheng Ji Receives the M.G. Michael Award for Research

Tuesday, January 12, 2016 - 4:23pm

Congrats to Pengsheng for his recognition of excellence in research! 

We are so proud of you! 


Pengsheng Ji Named 2014-2015 Teaching Academy Fellow

Friday, September 12, 2014 - 3:59pm

Ji_Pengsheng.headshot.jpg

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