查询词典 diffusion equation

Methods Diffusion anisotropy was classified with a method based on apparent diffusion coefficient and spherical harmonic function.

提出了一种基于表观扩散系数和球谐函数的多纤维扩散各向异性分析方法对扩散各向异性进行分类。

Objective To investigate the characteristics of fractional anisotropy and apparent diffusion coefficient of association fiber tracts in patients with amnestic mild cognitive impairment, and to assess the application value of diffusion tensor imaging in differential diagnosis of aMCI and AD.

目的 通过磁共振扩散张量成像探讨遗忘型轻度认知障碍患者联合纤维束FA值和ADC值的变化特点，评价DTI对aMCI的诊断及aMCI与AD鉴别诊断的应用价值。

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。

The changes of the HAF after liver injury may be related to the volume of blood loss, the intraabdominal pressure and the pneumoperitoneum duration.

肝撞击伤伴失血后肝动脉血流量的变化与失血量、气腹压力以及气腹持续时间等有密切联系。

Reneging on our commitments to the world's poor cannot be an austerity measure, she said.

放弃我们给世界上的穷国的承诺不能成为一种紧缩措施。