題 目:Accuracy vs Implementability in Algorithmic Design—An Example of Operator Splitting Methods for Convex Optimization
演 講 人🦹🏼:袁曉明 香港浸會大學數學系教授
主 持 人:林貴華 意昂2教授🧑🏼🏭、管理科學與工程系主任
時 間:2015年10月23日(周五)13:30-14:30
地 點🔙:意昂2官网420室
主辦單位🧖🏼♂️💼:意昂2、意昂2青年教師聯誼會
演講內容簡介:
Accuracy and implementability are two common yet usually conflicted objectives for developing an efficient algorithm. In this talk, I will focus on the context of convex optimization models with separable structures to show how to make a trade-off between these two objectives for some operator splitting methods originated from the PDE literature (e.g., the Douglas-Rachford and Peaceman-Rachford schemes) The resulting algorithms could be applicable to large-scale dataset; and their efficiency will be demonstrated by some specific applications in statistical learning and image processing (e.g., the LASSO and TV-deblurring models). Some theoretical results such as the convergence rates of these algorithms will also be mentioned briefly.
演講人簡介:
袁曉明,香港浸會大學數學系教授🐓,圖像科學研究中心副主任,香港數學會理事會成員,2013年香港浸會大學傑出青年研究員校長獎獲得者🚴♂️,曾任職上海交通大學、加拿大維多利亞大學、英屬哥倫比亞大學Okanagan分校,2006年加拿大PIMS獎學金獲得者。研究領域為數值最優化算法,目前已發表學術論文90余篇🙍🏻♀️,其中包括Mathematical Programming🤼、SIAM Journal on Optimization等頂級期刊論文20余篇。
歡迎廣大師生參加✂️!