克斯韦平衡分布函数,且其发生率正比于分子碰撞频率。于是,波尔兹曼方程可被写作以下的BGK形式:(也叫做“驰豫时间近似”,relaxation time approximation) ∂ f ∂ t + p m ⋅ ∇ f + F ⋅ ∂ f ∂ p = ν ( f 0 − f ) {\displaystyle
(PDF)于2019-08-19). H. Zha, C. Ding, M. Gu, X. He and H.D. Simon. Spectral Relaxation for k-means Clustering (PDF). Neural Information Processing Systems vol