基于理论分析建立了第三类边界条件下的煤粒瓦斯扩散方程，并给出了解析解。
The differential equations of coal particle gas diffusion under the third kind boundary condition and its analytical solution have obtained on the basis of theoretical analysis.
将温度和换热系数按照第三类边界条件予以施加，计算得到活塞的稳态温度场；
The temperature and heat exchange coefficient were applied on FEA model as third boundary condition and the temperature field was calculated.
第一类边界条件、第二类边界条件和第三类边界条件很容易的引入该算法无需特殊处理。
The first boundary condition, the second boundary condition and the third category boundary conditions would be very easy to introduce the algorithm without special treatment.
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