In this paper, the simultaneous identification of damping or anti-damping coefficient and initial value for some PDEs is considered. An identification algorithm is proposed based on the fact that the output of system happens to be decomposed into a product of an exponential function and a periodic function. The former contains information of the damping coefficient, while the latter does not. The convergence and error analysis are also developed. Three examples, namely an anti-stable wave equation with boundary anti-damping, the Schrödinger equation with internal anti-damping, and two connected strings with middle joint anti-damping, are investigated and demonstrated by numerical simulations to show the effectiveness of the proposed algorithm.
Learning embeddings of non-linear PDEs: the Burgers' equation
Departament de Física Quántica i Astrofí sica, Universitat de Barcelona(巴塞罗那大学量子物理与天体物理系);Institut de Ciencies del Cosmos (ICC), Universitat de Barcelona(巴塞罗那大学天体物理研究所);Institucio Catalana de Recerca i Estudis Avancats (ICREA)(加泰罗尼亚高级研究与高级教育研究所)
Scattering for Defocusing NLS with Inhomogeneous Nonlinear Damping and Nonlinear Trapping Potential
CNRS and Institut de Mathématiques de Toulouse(法国国家科学研究中心和图卢兹数学研究所;UMR5219,图卢兹大学;法国国家科学研究中心,图卢兹第三国立高等理工学院);UMR5219, Université de Toulouse;CNRS, UPS IMT