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→通用方程（对于混合物）
==通用方程（对于混合物）==
==通用方程（对于混合物）==
For a mixture of chemical species labelled by indices ''i'' = 1, 2, 3, ..., ''n'' the equation for species ''i'' is<ref name="Encyclopaediaof" />
For a mixture of chemical species labelled by indices ''i'' = 1, 2, 3, ..., ''n'' the equation for species ''i'' is<ref name="Encyclopaediaof" />
对于具有多种化学组分的混合物，我们以 i =1，2，3，……，n 标记各种成分。则对于组分i的方程是：<ref name="Encyclopaediaof" />
对于具有多种化学组分的混合物，我们以 i =1，2，3，……，n 标记各种成分。则对于组分i的方程是：<ref name="Encyclopaediaof" />
where ''f<sub>i</sub>'' = ''f<sub>i</sub>''('''r''', '''p'''<sub>''i''</sub>, ''t''), and the collision term is
where ''f<sub>i</sub>'' = ''f<sub>i</sub>''('''r''', '''p'''<sub>''i''</sub>, ''t''), and the collision term is
其中 <math>f_i = f_i(\mathbf{r}, \mathbf{p_i}, t)</math>。碰撞项为
其中 <math>f_i = f_i(\mathbf{r}, \mathbf{p_i}, t)</math>。碰撞项为
where ''f′'' = ''f′''('''p′'''<sub>''i''</sub>, ''t''), the magnitude of the relative momenta is
where ''f′'' = ''f′''('''p′'''<sub>''i''</sub>, ''t''), the magnitude of the relative momenta is
其中 <math>f' = f'(\mathbf{p_i'}, t)</math>，相对动量的大小是
其中 <math>f' = f'(\mathbf{p_i'}, t)</math>，相对动量的大小是
and ''I<sub>ij</sub>'' is the differential cross-section, as before, between particles ''i'' and ''j''. The integration is over the momentum components in the integrand (which are labelled ''i'' and ''j''). The sum of integrals describes the entry and exit of particles of species ''i'' in or out of the phase-space element.
and ''I<sub>ij</sub>'' is the differential cross-section, as before, between particles ''i'' and ''j''. The integration is over the momentum components in the integrand (which are labelled ''i'' and ''j''). The sum of integrals describes the entry and exit of particles of species ''i'' in or out of the phase-space element.
I<sub>ij</sub> 是粒子i和粒子j之间的微分散射截面。此积分的和描述的是某一相空间元中，组分i粒子的进出。
I<sub>ij</sub> 是粒子i和粒子j之间的微分散射截面。此积分的和描述某一相空间元中，组分i粒子的进出。
==应用与推广==
==应用与推广==