手机赌博游戏

Global Existence of Weak Solutions to An IBVP of a Phase-Field Model for Motion of Grain Boundaries

活动时间:2025-11-14 15:30

活动地点:手机赌博游戏 2432报告厅

主讲人:朱佩成

主讲人中文简介:

朱佩成,男,1969年7月出生,浙江省金华市永康市人。复旦大学、日本九州大学博士。北京应用物理与计算数学研究所、日本学术振兴会博士后。现任上海大学教授、博士生导师、上海市高端人才计划特聘教授;曾任上海大学理学院数学系主任。科学中国人2016年度人物。曾在日本、德国和西班牙工作。研究领域是应用数学、材料科学建模、流体力学及其在工业中的应用。发表了国际性杂志论文60余篇,专著两部,博士论文两篇,博士后研究报告两部。培养了博士、硕士20余名。成功完成了多个国家的科研项目,含“汽车用高压共轨技术中基于微纳米流体仿真模拟的数学问题研究”、“若干金融保险相关软件的开发”和“高压共轨技术中基础问题研究”等。

活动内容摘要:

We shall prove global existence of weak solutions to an initial-boundary value problem for a novel phase-field model which is an elliptic-parabolic coupled system. This model is proposed as an attempt to describe the motion of grain boundaries, a type of interface motion by interface diffusion driven by bulk free energy in elastically deformable solids. Its applications include important processes arising in Materials science, e.g., Sintering. In this model the evolution equation for an order parameter is a non-uniformly, degenerate parabolic equation of fourth order, which differs from the Cahn-Hilliard equation by a non-smooth term of the gradient of the unknown.

主持人:秦玉明