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首页> 外文期刊>SIAM Journal on Mathematical Analysis >Optimal tracing of viscous shocks in solutions of viscous conservation laws
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Optimal tracing of viscous shocks in solutions of viscous conservation laws

机译:粘性守恒律解中粘性冲击的最佳追踪

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摘要

This paper contains a qualitative study of a scalar conservation law with viscosity: u(t) + f(u)(x) = u(xx). We consider the problem of identifying the location of viscous shocks, thus obtaining an optimal finite dimensional description of solutions to the viscous conservation law. We introduce a nonlinear functional whose minimizers yield the viscous traveling profiles which optimally fit the given solution. We prove that outside an initial time interval and away from times of shock interactions, our functional remains very small, i.e., the solution can be accurately represented by a finite number of viscous traveling waves.
机译:本文包含对标量守恒律的定性研究,其粘度为:u(t)+ f(u)(x)= u(xx)。我们考虑确定粘性冲击的位置的问题,从而获得粘性守恒定律解的最优有限维描述。我们介绍了一种非线性函数,其最小化函数可产生最适合给定解决方案的粘性行驶曲线。我们证明,在初始时间间隔之外并且远离冲击相互作用的时间,我们的功能仍然很小,即解决方案可以由有限数量的粘性行波精确表示。

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