arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.00291math.AP
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保温问题的稳定性分析

Stability analysis on the thermal insulation problems

Yong Huang, Qinfeng Li, Qiuqi Li

摘要:

基于区域变分的观点,对绝热背景下的两个形状最优化问题进行了稳定性分析。新颖之处在于,我们不要求二阶变分垂直于边界。例如,平移变分是不正常的,但正如我们在工作中所看到的,它不仅在获得第一个问题中热源为径向时球形状稳定的充要条件中起作用,而且在推导第二个问题中绝缘材料对称性破缺阈值的精确值中也是必不可少的,其结果是与等周常数有关,并且又意味着球形状在二维中是稳定的。

英文摘要:

Based on the domain variational point of view, we carry on stability analysis on two shape optimization problems from thermal insulation background. The novelty is that, we do not require that the second variation is normal to the boundary. For example, translation variation is not normal, but as one can see in our work, it not only plays a role in obtaining the necessary and sufficient condition for stability of ball shape in the first problem when heat source is radial, but also is essential in deriving the precise value of symmetry breaking threshold of insulation material in the second problem, which turns out to be related to isoperimetric constant and in turn implies that ball shapes are stable in two dimensions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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