“天佑数学讲坛”第27讲——梁兆正副教授
应兰州交通大学数学系张维红博士邀请,兰州大学梁兆正副教授将于2023年5月19-20日与我系相关师生进行学术研讨,并于5月19日举行学术报告,欢迎各位老师和研究生同学参加。
报告题目:Fast rotated BSOR method for block two-by-two linear systems with application to PDE-constrained optimal control problems
报告摘要:In this talk,we consider iterative solution of certain large scale block two-by-two linear systems arising from numerical solution process of some PDE-constrained optimal control problems. Based upon skillful rotating technique, a new fast and robust stationary iteration method is constructed from the idea of classical block successive over relaxation (BSOR) iteration. Equipped with a practical problem independent parameter choice strategy, the proposed method can result in a sharp parameter independent convergence rate close to 0.17. Moreover, a robust preconditioner is developed from an equivalent form of the new iteration method, which is suitable for inexact variable right preconditioning within Krylov subspace acceleration. Numerical examples from both distributed steady control problem and unsteady control problem which leads to complex Kronecker structured linear system are tested to show that the new solution methods are competitive to some existing ones.
时间:5月19日16:40-17:20
地点:8-D-118
专家简介:
梁兆正,兰州大学数学与统计学院副教授,研究方向为数值代数,主要研究兴趣为产生于不同应用背景的大规模结构代数系统的快速算法和预处理技术,主持完成国家自然科学基金项目和中央高校基本科研业务费项目各一项,现主持中央高校基本科研业务费一项,在Adv. Comput. Math., BIT Numer. Math., Appl. Numer. Math., Numer. Linear Algebra Appl., Linear Algebra Appl. 等高水平SCI期刊发表科研论文多篇。
“天佑数学讲坛”由兰州交通大学数理学院发起创办,是数理学院数学系高层次常态化的学术交流平台。讲坛将不定期邀请国内外知名学者围绕数学国际前沿动态展开学术交流与探讨,通过学术报告、小型研讨会等形式为数学系师生提供向国内外知名学者学习的机会,以便能够及时准确地了解数学领域的前沿学术信息,进一步提升数学系师生的学术视野及科研水平。
数理学院
2022年5月16日