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arXiv 2008.03773math.AP
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具有非零外部数据的分数阶抛物型方程的指数公路性质

Exponential Turnpike property for fractional parabolic equations with non-zero exterior data

Mahamadi Warma, Sebastian Zamorano

摘要:

我们考虑了时变最优控制问题的最优解在时域趋于无穷远时平均收敛到相应的平稳最优控制问题的最优解。控制问题在工程、经济和科学中起着关键作用。更准确地说,在气候科学中,相关问题往往是在长时间尺度中制定的,因此,当时间范围趋于无穷大时,可能的渐近行为问题变得很自然。假设所考虑的受控动态是稳定的,对一个固定的解决方案,以下自然的问题出现:时间平均值的最优控制和轨迹收敛到固定的最优控制和状态的时间范围走向无穷大?这个问题与所谓的收费公路性质密切相关,该性质表明,通常情况下,连接两个相距甚远的点的最佳轨迹包括,离开原点,迅速接近稳定状态(收费公路),大部分时间都停留在那里,只有在非常接近最终目的地和时间时才离开。本文研究了具有非零外部条件(Dirichlet和非局部Robin)的热方程的分数Laplace算子$(-Δ)^s$($0<s<1$).我们证明了非局部Robin最优控制问题的收费公路性质以及Dirichlet和非局部Robin最优控制问题的指数收费公路性质。

英文摘要:

We consider averages convergence as the time-horizon goes to infinity of optimal solutions of time-dependent optimal control problems to optimal solutions of the corresponding stationary optimal control problems. Control problems play a key role in engineering, economics and sciences. To be more precise, in climate sciences, often times, relevant problems are formulated in long time scales, so that, the problem of possible asymptotic behaviors when the time-horizon goes to infinity becomes natural. Assuming that the controlled dynamics under consideration are stabilizable towards a stationary solution, the following natural question arises: Do time averages of optimal controls and trajectories converge to the stationary optimal controls and states as the time-horizon goes to infinity? This question is very closely related to the so-called turnpike property that shows that, often times, the optimal trajectory joining two points that are far apart, consists in, departing from the point of origin, rapidly getting close to the steady-state (the turnpike) to stay there most of the time, to quit it only very close to the final destination and time. In the present paper we deal with heat equations with non-zero exterior conditions (Dirichlet and nonlocal Robin) associated with the fractional Laplace operator $(-Δ)^s$ ($0<s<1$). We prove the turnpike property for the nonlocal Robin optimal control problem and the exponential turnpike property for both Dirichlet and nonlocal Robin optimal control problems.

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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