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【学术报告】研究生“灵犀学术殿堂”第548期之孙德锋教授报告会通知
2020-06-29 10:40   党委学生工作部 审核人:   (点击: )

全校师生:

我校定于2020年06月30日举办研究生灵犀学术殿堂——孙德锋教授报告会,现将有关事项通知如下:

1.报告会简介

报告人:孙德锋教授

时间:2020年06月30日(星期二)10:00

地点:腾讯会议(会议号:343 393 386)

报告题目:Solving Statistical Optimization Problems: Second Order Methods with First Order Complexities or Less

内容简介:It is widely believed by many researchers, in particular by those outside the traditional optimization community, that the second-order methods such as Newton’s method are no longer applicable for solving large scale optimization problems. This is partially true for optimization models that neither need a good optimal solution nor need to be solved quickly. In this talk, we shall use some large scale statistical optimization problems arising from machine learning to explain why the second-order methods, in particular sparse nonsmooth Newton methods, if wisely used, can be much faster than the first-order methods. The key point is to make use of the second order sparsity of the optimal solutions in addition to the data sparsity so that at each iteration, the computational costs of the second order methods can be comparable or even lower than those of the first order methods. More interestingly, these second order methods can exhibit even more advantages for larger problems.

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数学与统计学院

复杂系统动力学与控制工信部重点实验室

2020年6月29日

报告人简介

Professor Defeng Sun is currently Chair Professor of Applied Optimization and Operations Research at the Hong Kong Polytechnic University. He mainly publishes in convex and non-convex continuous optimization. Together with Professor Kim-Chuan Toh and Dr Liuqin Yang, he was awarded the triennial 2018 Beale–Orchard-Hays Prize for Excellence in Computational Mathematical Programming by the Mathematical Optimization Society. He served as editor-in-chief of Asia-Pacific Journal of Operational Research from 2011 to 2013 and he now serves as associate editor of Mathematical Programming, SIAM Journal on Optimization, Journal of the Operations Research Society of China, Journal of Computational Mathematics, and Science China: Mathematics. He was elected as a SIAM Fellow in 2020.

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