Infinite-Dimensional Variational Inference And its Applications

主讲人 Speaker:贾骏雄
时间 Time: 周五 10:00-11:30,2021 - 9 - 24
地点 Venue:腾讯会议 ID:386 633 441

摘要 Abstract

In this talk, we will review the Bayes’ analysis method for inverse problems of partial differential equations (PDEs) and machine learning (ML), especially focused on the infinite-dimensional (ID) framework. Due to the computational efficiency, variational inference (a large class of efficient approximate sampling methods) achieves great success under the finite-dimensional (FD) setting in the ML community. We try to generalize the variational inference (VI) methods from FD to ID setting, which is more suitable for continuously formed inverse problems of PDEs and ML problems. Specifically, we first formulate the ID mean-field based VI and apply the proposed general framework to some linear inverse problems. Then, we construct the Stein variational gradient descent under the ID setting, which may be useful for solving nonlinear inverse problems. At last, combining the ideas of generating deep neural networks, we build a generating inference framework named VINet (variational inverting network) based on a detailed analysis of VI method in ID case, which shown to be a promising method for solving inverse problems of PDEs. Overall, three attempts for constructing VI methods in ID space have been shown, which indicate the usefulness of the ID spaced VI methods.

简介 Description

贾骏雄博士2015年毕业于西安交通大学且于同年留校任教,2017年聘为西安交通大学数学学院副教授,主要研究领域为反问题的贝叶斯推断与机器学习方法。主持国家自然科学基金青年、面上项目各一项,2017年获得陕西省优秀博士学位论文奖,2020年入选陕西高校青年杰出人才支持计划。在Inverse Probl., SIAM J. Sci. Comput., J. Funct. Anal., J. Differential Equations等国际著名期刊上共发表论文27篇。


会议 ID386 633 441