應(yīng)yl7703永利官網(wǎng)張國鳳教授邀請,莆田學(xué)院數(shù)學(xué)與金融學(xué)院曾閩麗副教授將于2020年1月13日至1月17日訪問我校并作報(bào)告。
題目:Scaled diagonal-times-Toeplitz splitting iteration methods for solving discretized spatial fractional diffusion equations
地點(diǎn):齊云樓911
時(shí)間:1月14日(周二)下午15:00
簡介:In this work, we firstly propose a scaled diagonal-times-Toeplitz splitting (SDTS) iteration method for solving the discretization system from one-dimensional spatial fractional diffusion equations of variable coefficients. The SDTS iteration methods can be used to solve the one-dimensional spatial fractional diffusion equations of both anisotropic and isotropic, while the respectively scaled HSS (RSHSS) iteration method can be used only to solve anisotropic spatial fractional diffusion equations. Therefore, the SDTS iteration method is of wider range of applications than the RSHSS iteration method. Furthermore, the SDTS iteration method will naturally lead to a scaled diagonal-times-circulant splitting (SDCS) preconditioner. Hence, we also conclude theoretically that the eigenvalues of the corresponding preconditioned matrix are clustered around 1. Numerical experiments are performed to demonstrate the feasibility and effectiveness of the SDCS preconditioned GMRES method for solving the proposed examples.
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曾閩麗,計(jì)算數(shù)學(xué)博士,莆田學(xué)院數(shù)學(xué)與金融學(xué)院副教授,華僑大學(xué)兼職碩士生導(dǎo)師。主要研究方向?yàn)閿?shù)值線性代數(shù)、PDE優(yōu)化問題離散系統(tǒng)及分?jǐn)?shù)階偏微分方程結(jié)構(gòu)化離散系統(tǒng)的快速算法等。先后赴美國新奧爾良大學(xué)、英國伯明翰大學(xué)、澳門大學(xué)及中國科學(xué)院數(shù)學(xué)與系統(tǒng)科學(xué)研究院合作訪問研究。先后主持國家基金2項(xiàng),福建省科技廳項(xiàng)目1項(xiàng),福建省杰青項(xiàng)目1項(xiàng),福建省教育廳中青年科研項(xiàng)目及校內(nèi)項(xiàng)目若干項(xiàng)。以第一作者在包括 Applied Mathematics and Computation、Computers and Mathematics with Applications、Journal of Computational and Applied Mathematics 等國際知名SCI期刊上發(fā)表論文20余篇。2017年分別入選福建省杰出青年培育計(jì)劃人選、獲莆田市“壺蘭英才”青年拔尖人才稱號。2018年獲莆田市“巾幗標(biāo)兵”、“美麗青年先鋒章”、“三八紅旗手”等榮譽(yù)稱號。
甘肅省高校應(yīng)用數(shù)學(xué)與復(fù)雜系統(tǒng)重點(diǎn)實(shí)驗(yàn)室
yl7703永利官網(wǎng)
萃英學(xué)院
2020年1月14日