查询词典 diffusion

Objective To investigate the diagnostic value of apparent diffusion coefficient value of diffusion weighted imaging in liver cirrhosis.

目的初步探讨磁共振弥散加权成像ADC值对肝硬化的诊断价值。

Objective To investigate the effect of apparent diffusion coefficient value in diffusion-weighted imaging in full-term neonates with hypoxic-ischemic encephalopathy.

目的 探讨磁共振扩散加权成像的表观弥散系数值在新生儿缺氧缺血性脑病中的应用价值。

Because of the smaller diffusion coefficient, the diffusion of Li〓 in solid phase is usually the rate determining step.

由于扩散系数较小，因此Li〓在固相中的扩散一般为反应的速控步骤。

Gas diffusion layer is one of the most important components in proton exchange membrane fuel cell. The contact resistance between current collector and gas diffusion layer is an important part of the total resistance of fuel cell and is also a key factor led to the power loss of PEMFC.

气体扩散层是质子交换膜燃料电池的重要组件，其与极板之间的接触电阻是燃料电池内阻的重要组成部分，也是导致燃料电池功率损失的重要因素。

The computational formula for diffusion coefficient of fiber solvent is as follows:During the process of di-diffusion, D is related to the variety of extracting agent and extracting mode, D increases with the increasing of extracting bath ratio and temperature.

纤维溶剂扩散系数的计算公式为：双扩散过程中溶剂扩散系数与萃取剂种类和萃取方式有关，并随萃取浴比和萃取浴温度的升高而增加。

Objective:To correlatively study the relationship between the water diffusion parameters measured using diffusion tensor imaging and the histological malignancy of astrocytoma.

目的：探讨扩散张量成像测量水分子扩散状态的参数相对值与星形细胞瘤恶性程度之间的相关性。

So, we make the selective emission through the one step diffusion method by the countercheck effect instead of by the ordinary two step diffusion method.

因此，我们认为可以通过利用SiO_2的阻挡作用，结合机械刻槽和丝网印刷，通过一次扩散宋代替通常的分两次进行扩散宋制作"选择性发射极"的方法。

With the counterflow diffusion flame serving as an object of investigation and by the use of a detailed elementary reaction kinetics model based numerical analysis method a study was conducted of the influence of thermal radiation on the flame structure and NO x formation in a methane/oxygen enriched (oxygen concentration 60%) air diffusion flame.

在富氧燃烧的研究方面，国内已有一些利用富氧燃烧节能降耗的应用性报道，但是，对富氧燃烧的火焰特性以及污染物的排放等方面的基础特性研究还比较少。

It is a generalization of the nonlinear diffusion equation proposed by Perona-Malik and the method presented by Cuesta, and interpolates between the nonlinear parabolic equation and the nonlinear hyperbolic equation, thus can effectively control the diffusion process so that noises can be removed and details of the image such as edges can be preserved as much as possible simultaneously.

提出了一种包含对时间的分数阶导数的非线性扩散方程，它是对Perona-Malik的非线性扩散方程和Cuesta提出的方程的推广，介于非线性抛物方程和非线性双曲方程之间，从而能有效地控制扩散过程，使得在去除图像噪声的同时能够尽可能地保留图像的边缘等细节信息。

Many natural phenomena and physical laws can be described by time dependent nonlinear differential equations, such as heat conduction equation, sound wave and elastic wave equation, reaction diffusion and convection diffusion equation, fluid and aerodynamics equations, etc.

大多数的自然现象与物理规律都可归结为与时间相关的非线性偏微分方程，诸如热传导方程、声波与弹性波方程、反应扩散与对流扩散方程、流体与气体力学方程组等发展方程。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。