报告人：邹长亮教授（南开大学）

报告时间：2023年9月15日（周五）10:30-11：30

报告地点：维格堂319

报告题目：Large-scale Detection of Differential Sparsity Structure

报告摘要：Two-sample multiple testing has a wide range of applications. Most of the literature considers simultaneous tests of equality of parameters. This work takes a different perspective and investigates the null hypotheses that the two support sets are equal. This formulation of the testing problem is motivated by the fact that in many applications where the two parameter vectors being compared are both sparse, we might be more concerned about the detection of differential sparsity structures rather than the difference in parameter magnitudes. A general approach to problems of this type is developed via a novel double thresholding (DT) filter. The DT filter first constructs a sequence of pairs of ranking statistics that fulfill global symmetry properties, and then chooses two data-driven thresholds along the ranking to simultaneously control the false discovery rate (FDR) and maximize the number of rejections. Several applications of the methodology are given, including tests for large-scale correlation matrices, high-dimensional linear models and Gaussian graphical models. 

报告人简介：邹长亮，南开大学统计研究院院长、统计与数据科学学院副院长、教授及博士生导师。主要从事统计学及其与数据科学领域的交叉研究和实际应用。研究兴趣包括：高维数据统计推断、大规模数据流分析、变点和异常点检测等，在Ann.Stat.、Biometrika、J.Am.Stat.Asso.、Math. Program.、Technometrics、IISE Tran、J.Qual.Tech.等统计学和工业工程领域期刊上发表论文130余篇。多篇论文入选ESI的高被引论文，连续多年入选爱思唯尔（Elsevier）“中国高被引学者”。主持国家自然科学基金委优青、杰青、重点项目、重大项目课题等。

邀请人：徐礼柏