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Simulation of boundary conditions and initial condition discontinuities

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Dear Dr.Lu: Recently, I'm having a problem with PINNs simulation and would like to ask for your advice. The problem is described as follows: **PDE:u_xx+u_x=u_t** **BC1:u(0,t)=0** **BC2:u(10,t)=m (where m is...

Adaptive activation function

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Hi Dr.Lu I found a discussion of adaptive activation functions in the open issues, and you mentioned that the "_https://deepxde.readthedocs.io/en/latest/modules/deepxde.maps.html#deepxde.maps.activations.layer_wise_locally_adaptive_" link has a related report. Unfortunately, it seems to be...

尊敬的孟老师： 孟老师您好，非常抱歉冒昧打扰到您，我是来自于中南大学土木工程学院的博士生，我看了您在JCP上发表的题为《A composite neural network that learns from multi-fidelity data: Application to function approximation and inverse PDE problems》的文章非常感兴趣，因为这可以减少算法对数据的依赖，我想把这一方法应用到我们岩土工程的本构模型和内部侵蚀当中，但是内部侵蚀含有一些PDE信息，我也想应用起来，但是我在阅读您的代码过后，我发现您的代码当中没有包含物理信息的建模过程，我注意到您文章中的非饱和土渗流这一案例就对物理信息有所包含，您这一部分的代码可以提供给我学习嘛。 此致！ 中南大学兰鹏

code issue

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This might be a stupid question. I read the introduction to the code and uncommented a line of ExpData in data.py, but why did I still get an error when...

Obtain Random field of slope

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Dear, I am utilizing Gstools to create a random field for a slope, and I have retrieved my grid data with coordinates X=data[:,0:1] and Y=data[:,1:2]. Assuming the generation of a...