The direct motion of Brownian particle is considered as a result of system derived by external non-equilibrium fluctuation. A corresponding diffusion model is proposed.
将布朗粒子的定向运动，看作是系统受到外部非平衡涨落作用的结果，并建立相应的扩散模型。
Topology-finite-element method is used and a topology-finite-element model for diffusion equation of non-equilibrium carriers is obtained.
文中采用拓扑有限元法，得出非平衡载流子扩散方程的拓扑有限元模型。
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