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          Recent progress on Douglas-Rachford splitting method for “strongly+weakly” convex programming

            2018-04-30  訪問:

          Abstract

           

          報告題目: Recent progress on Douglas-Rachford splitting method for “strongly+weakly” convex programming

          報告人:郭科(西華師范大學,博士)

          時間:201855 14:30-15:30

          地點:明理樓A514

           

          Abstract: We consider the convergence of the Douglas-Rachford splitting method (DRSM) for minimizing the sum of a strongly convex function and a weakly convex function; a setting having various applications especially in some sparsity-driven scenarios with the purpose of avoiding biased estimates which usually occur when convex penalties are used. Though the convergence of the DRSM has been well studied for the case where both functions are convex, its results for some nonconvex-function-involved cases, including the ``strongly + weakly" convex case, are still in infancy. In this paper, we prove the convergence of the DRSM for the ``strongly + weakly" convex setting, under relatively mild assumptions compared with some existing work in the literature. Moreover, we establish the rate of asymptotic regularity and the local linear convergence rate in asymptotical sense under some regularity conditions.

           

          報告人簡介:郭科,西華師范大學講師,2017 年博士畢業于南京師范大學,師從國家杰出青年基金獲得者韓德仁教授。主要從事數值優化、變分不等式、凸優化及非凸優化等 方向的研究。20156月至20167月應邀在香港浸會大學數學系訪問。2018411日至2018423日應邀訪問北京國際數學研究中心。20168 獲第二屆中國運籌學會數學規劃分會研究生論壇優秀成果獎。20177月獲中 國計算數學學會第八屆優秀青年論文一等獎。以第一作者身份在《SIAM Journal on Numerical Analysis》等計算和優化的主流雜志上共發表SCI 論文5篇,同時,還有5篇論文處于在審狀態。多次應邀參加國內外學術會議并作學術報告。主持了江蘇省普通高校研究生科研創新計劃項目1項,西華師范大學博士科研啟動項目1項,西華師范大學大學生科研創新基金項目2項;作為主要參與人, 參加了國家自然科學基金面上項目2項,國家自然科學基金青年基金項目1項。現為《Mathematical Programming》、《SIAM Journal on Optimization》、《SIAM Journal on Imaging Sciences》、《Computational Optimization and Applications》、《Optimization  Methods and Software 》、《Numerical Linear Algebra with Applications》、《Numerical Algorithms》、《Journal of Operations Research Society of China》、《Journal of Computational Mathematics》、《中國科學?數學》、《計算數學》等期刊的審稿人。

           

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