The issue of the relaxation to equilibrium has been at the core of the kinetic theory of rarefied gas dynamics. In the paper, we introduce the Deep Neural Network (DNN) approximated solutions to the kinetic Fokker-Planck equation in a bounded interval and study the large-time asymptotic behavior of the solutions and other physically relevant macroscopic quantities. We impose the varied types of boundary conditions including the inflow-type and the reflection-type boundaries as well as the varied diffusion and friction coefficients and study the boundary effects on the asymptotic behaviors. These include the predictions on the large-time behaviors of the pointwise values of the particle distribution and the macroscopic physical quantities including the total kinetic energy, the entropy, and the free energy. We also provide the theoretical supports for the pointwise convergence of the neural network solutions to the \textit{a priori} analytic solutions. We use the library \textit{PyTorch}, the activation function \textit{tanh} between layers, and the \textit{Adam} optimizer for the Deep Learning algorithm.

通过引入深度神经网络对偏微分方程进行逼近，我们研究了有界区间内的动力学Fokker-Planck方程的渐近行为及其它物理相关宏观量，包括边界条件对于渐近行为的影响，以及神经网络解的分析解的收敛性。在Deep learning算法中使用PyTorch库、tanh激活函数和Adam优化器。

通过神经网络方法求解动力学 Fokker-Planck 方程的平衡趋势