我们首先在**Mathematica**中徒手打造一个人工神经网络，然后对该神经网络进行训练，最后用训练得到的模型来判断图片上的手写数字是多少。

Do one thing and do it well.

Every story has a beginning and an end.

Do one thing and do it well.

Every story has a beginning and an end.

Backpropagation in Artificial Neural Network

我们首先在**Mathematica**中徒手打造一个人工神经网络，然后对该神经网络进行训练，最后用训练得到的模型来判断图片上的手写数字是多少。

维基百科解释: Lotka Volterra

modelica Modeling Primer-1

I have seen a book “Model Thinking” before, and this time it happens to be in the CoVid-2019 disease ravaging the world, by chance I saw the prediction model SEIR about epidemiology, I took this opportunity to start studying mathematical models, and decided to pick up the mathematical analysis, ordinary differential equations, partial differential equations, differential geometry and other courses I studied in college. I came across the language Modelica, and since I had been…