扩散方程是，适用于扩散过程的。
So, the diffusion equation is something that governs, well, what's called diffusion.
那扩散方程是什么？
来看看扩散方程。
提出了一种基于各向异性扩散方程的改进方法。
An improved method based on anisotropic diffusion equation was proposed.
从理论上研究了一类广义扩散方程的求解问题。
This paper presents a theoretical analysis for a class of generalized diffusion equations.
将这两个关系式结合起来,就得到了扩散方程，对不起。。。
When you combine these two relations together that is how you get the diffusion equation.
研究了具有非线性反应扩散方程奇摄动内层问题。
The nonlinear singularly perturbed interior layer problems of the reaction diffusion equations were considered.
建立了含有外力的分数阶非线性对流-扩散方程。
Fractional nonlinear convection-diffusion equation with external forces is given.
研究了具有摄动边界的非线性反应扩散方程的问题。
A nonlinear problem for reaction diffusion equation with a perturbed boundary is considered.
研究了偏微分扩散方程在医学超声图像去噪中的应用。
Partial differential diffusion equation is used to remove the noise of medical ultrasonic image.
广义条件对称；精确解；非线性反应扩散方程；对称群。
The generalized conditional symmetry; Exact solutions; The nonlinear reaction diffusion equations; symmetry group.
浓度剖面的实验数据由非线性扩散方程的数值解进行拟合。
Numerical resolution of a non-linear diffusion equation was used to fit the experimental data.
对这类现象的描述依赖于对相应反应扩散方程的深入研究。
The description of these phenomena depends on the deepgoing research of the corresponding nonlinear-diffusion equations.
研究由退化非线性扩散方程所支配系统的周期最优控制问题。
This paper deals with the periodic optimal control governed by a degenerate nonlinear diffusion equation.
此外，对于具有源项慢速扩散方程，得到了解的有限传播性质。
For the slow diffusion equation with the source term, we also obtained the finite propagation property of solution.
控制方程采用通用的对流扩散方程并利用有限控制容积法离散。
The governing equations represented by the general convection diffusion forms are discretized using the finite control volume method.
在考虑了云中上升速度随高度变化的情况下求得了扩散方程的解。
Considering the rising speed in clouds changes with altitudes we obtained the solution for the diffusion equation.
讨论了一类具有转向点曲线的奇摄动反应扩散方程初始边值问题。
A class of singularly perturbed reaction diffusion equation initial boundary value problem with a curve of turning point is discussed.
提出了一种基于各向异性扩散方程的B超图像斑点噪声抑制的算法。
An algorithm based on the anisotropic diffusion equation is presented to suppress the speckle noise of B-Scan ultrasound image.
首先通过横向积分将中子扩散方程化为三个互相耦合的一维偏通量方程。
First, the neutron diffusion equation is converted to three coupled one dimensional partial flux equation through transverse integration.
模型中水动力方程和泥沙扩散方程均采用幂函数方案的有限体积法离散。
In the model, the finite volume method discrete of power function is adopted for the hydrodynamic and silt diffusion equations.
由对流扩散方程的对流系数和扩散系数确定了局域平衡分布函数的系数。
The coefficients in the equilibrium distribution are determined by the convection coefficient and the diffusion coefficient.
比如说，扩散方程描述了空间中的烟雾的移动，或这是染料在溶液中的运动。
So, for example, that governs the motion of,say, smoke in the air, or if you put dye in the solution or things like that.
扩散方程将会告诉你，随着时间的流逝，这些东西如何扩散，最后布满整个杯子。
And, that equation will tell you how exactly over time this thing is going to spread out and start filling the entire glass.
给你们解释一下，这个从哪儿来？，在我解释之前，告诉大家，这个方程不只是扩散方程。
And, I'm going to have to explain to you, where does it come from? OK, but before I do that, well, let me point out actually that the equation is not just the diffusion equation.
将有限体积和有限元方法相结合，解决对流扩散方程问题，并给出了稳定性分析。
In this paper, finite bulk-finite element means is presented for solving convection-diffusion problem, moreover give out the stability analysis.
本文首先研究了扩散方程作为光学层析成像问题的正向模型的精确性及其适用条件。
In this thesis, the accuracy and the validity conditions of the diffusion equation as a forward model for the optical tomography was firstly studied.
在第二章中我们主要利用群分支法来求解非线性扩散方程(2.4)的分离变量解。
In the chapter 2, we find the separation of variables solutions for nonlinear reaction diffusion equation (2.4) by utilizing the group foliation method.
在第二章中我们主要利用群分支法来求解非线性扩散方程(2.4)的分离变量解。
In the chapter 2, we find the separation of variables solutions for nonlinear reaction diffusion equation (2.4) by utilizing the group foliation method.
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