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arXiv 1902.01907math.OC
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带时变延迟的退化抛物型方程的零能控性

Null controllability of degenerate parabolic equations with a time-varying delay

CRMEF Marrakech(马拉喀什中等师范教育学院);Ecole Normale Supérieure, Université Cadi Ayyad(卡迪·阿亚德大学高等师范学院);Faculty of Sciences Semlalia, Cadi Ayyad University(卡迪·阿亚德大学塞姆拉利亚理学院)

E. L. Mustapha Ait Benhassi, Mohamed Fadili, Lahcen Maniar

AI总结:

本文研究带时变状态延迟且在单端点退化的一维线性抛物型方程的零能控性,结合退化Carleman估计与单调性泛函得到可观性不等式,还通过空间延拓获得非退化端点的Dirichlet边界能控性,常延迟方程为特例。

摘要:

本文研究一维线性抛物型方程的零能控性,该方程具有时变状态延迟和在一个端点处退化的扩散系数,同时考虑弱退化和强退化两种情形。当延迟映射 $g(t)=t-\ au(t)$ 严格递增时,伴随方程包含由 $g^{-1}$ 对应的雅可比矩阵加权的超前项。对于作用于内部子区间的分布控制,我们将无延迟最终区间上的退化Carleman估计与上积分限随时间移动的单调性泛函相结合,得到的可观性不等式在延迟系数于控制区域外满足终端衰减条件时,给出零能控性。我们还通过在空间上延拓方程,在非退化端点处获得Dirichlet边界能控性,常延迟方程可作为特例被包含在内。

英文摘要:

This paper is devoted to the null controllability of a one-dimensional linear parabolic equation with a time-varying state delay and a diffusion coefficient that degenerates at one endpoint. Both the weakly and strongly degenerate cases are considered. When the delay map $g(t)=t-τ(t)$ is strictly increasing, the adjoint equation contains an advanced term weighted by the Jacobian associated with $g^{-1}$. For a distributed control acting on an interior subinterval, we combine a degenerate Carleman estimate on the final delay-free interval with a monotonicity functional whose upper integration limit moves in time. The resulting observability inequality gives null controllability under a terminal decay condition on the delayed coefficient outside the control region. We then obtain Dirichlet boundary controllability at the nondegenerate endpoint by extending the equation in space. The constant-delay equation is recovered as a special case.

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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