扩散系数

用激光脉冲法测量了晶体的热扩散系数，比较了晶体a轴和c轴的热扩散系数随温度的变化关系。

The thermal diffusion coefficient of the crystals were measured by the crystal pulse method .

CO2在多孔介质中扩散系数的测定

Determination of Diffusion Coefficient for Carbon Dioxide in the Porous Media

掺杂Ni（OH）2的质子扩散系数

The Proton Diffusion Coefficient of Doped Ni ( OH ) _2

可用半染时间预测染料的配伍值，其M和K参数可直观地反映染料的亲和力和扩散系数。

Response to the dyeing affinity and the diffusion coefficient .

Li在液态Al中扩散系数的测定研究

Study on Measurement of Diffusion Coefficient of Li Atom in Liquid Aluminium

不同荷电状态下α-Ni（OH）2的质子扩散系数

Proton diffusion coefficients of α - Ni ( OH ) _2 with various charge

O2，N2，CH4在碳分子筛上的扩散系数计算

Diffusion of o_2 , n_2 , ch_4 on carbon molecular sieve

快堆低密度区中子扩散系数Dz

Neutron Diffusion Coefficient D_z for Low Density Regions in Fast Reactor

稀土元素Ce热引入Si单晶中及Ce在Si中的扩散系数

Introduction of CE into Si and the diffusion coefficient of CE in Si

用加脉冲梯度场的NMR自旋回波法测量高分子聚合过程中的自扩散系数

Self-Diffusion Coefficients of Polymer in Polymerization Measured with Pulsed Field-Gradient NMR Spin Echo Methods

应用脉冲梯度场NMR研究脂蛋白的自扩散系数分布

Study of diffusion coefficient distribution of lipoproteins by pulse-field-gradient ( pfg ) - nmr

MH电极中氢扩散系数的测定及其应用

The Measurement and Application of Hydrogen Diffusion Coefficient in MH Electrode

使用该系统研究了人血清白蛋白分子的扩散系数在不同蛋白浓度和PH值条件下的扩散系数。

The diffusion coefficient of HSA ( human serum album ) was measured at different concentrations and pH by means of the setup .

Pt/Al2O3催化剂上1-丁烯深度氧化的催化剂有效因子及扩散系数

The effectiveness factors and diffusion coefficient of deep oxidation of 1-butene on pt / al_2 o_3 catalyst

饱和吸附量会随分子筛中Al原子比例的增加而减少，同时扩散系数也会减小。

The saturated adsorption amount will decrease by the increasing ratio of Al in zeolite , and the diffusion coefficient will decrease too .

结果表明，环形柱内连续相轴向扩散系数Ec随外界输入能量的增大而增大，随隙径比的增大而增大。

Results show that E_c increased with the increase of energy input and the increase of the ratio of annular width to col - umn diameter .

NaOH溶液中高铁酸根扩散系数的测定

Determination of diffusion coefficient of ferrate ( VI ) ion in NaOH solution

目的探讨平均扩散系数（ADC）和各向异性分数（FA）在脑膜瘤诊断中的价值。

Objective To evaluate the value of FA and ADC in the diagnosis of meningiomas .

二组患者病变椎体的表观扩散系数（ADC）值也做了对比。

Apparent diffusion coefficient ( ADC ) between benign and malignant vertebral fractures was also measured .

对计算中用到的材料参数如体积比热容Cρ、导热系数λ和热扩散系数H进行了实际测量和校正。

With actual measurement , some thermodynamic parameters such as bulk specific heat volume C ρ, coefficient of heat conductivity λ, and coefficient of heat diffusion H were obtained .

根据此模型所拟合出的反应速率常数k，平衡常数K、扩散系数D和样品表面乙二醇浓度C（？）

Reaction rate constant k , equilibrium cons-tant K , diffusion coefficient D and ethylene glycol concentration on sample surfaceC_s found according to the model are basically constants .

目的通过对表观扩散系数（ADC）与T2值的定量对比研究，探讨ADC值与T2值在肝脏局灶性小病变定性诊断中的价值。

Objective To evaluate the value of the ADCS and T_2 value in the diagnosis of small focal hepatic lesions .

从实测数据，用数值法与图解法求得Na~+的自扩散系数D（Na）~。

The Na ~ + self diffusion coefficient D_ ( Na ) ~ , was numerically and graphically evaluated from the measured diffusion profile .

，有效扩散系数D（？）和外相边界层效应系数K的值。

The average radius of emulsion drop ( R_4 ), effective diffusion coefficient ( D_4 ) and coefficient of outside phase boundary effect ( K ) have been calculated .

测出氧在Cu基体中的扩散系数和内氧化过程激活能，进而得到不同阶段反应界面迁移的速度方程。

Diffusion coefficient of oxygen and activation energy are determined from the internal oxidation kinetics so as to obtain the migration velocities of the reacting interface in different stages .

利用Taylor简化假定，在一定边界条件下，导出相对浓度分布和等效扩散系数的解析式，作出相应讨论。

The analytical expressions of the relative concentration distribution and the effective diffusion coefficient are derived under Taylor 's simplified assumptions and certain boundary conditions .

目的：评价多体素氢质子磁共振波谱（1HMRS）和表观扩散系数（ApparentDiffusionCoefficient，ADC）两种新技术在脑星形细胞瘤分级及鉴别诊断中的价值和意义。

Objective : To evaluate multi-voxel proton magnetic resonance spectroscopy ( 1HMRS ) and apparent diffusion coefficient ( ADC ) in cerebral astrocytomas grading and differentiation .

Ti-Al二元系中β，α，γ相的相平衡关系及互扩散系数的实验测定

Phase equilibrium relationships and interdiffusion coefficients of β,α and γ in the Ti-Al binary system

利用Townsend放电测定N2（A~3∑u~+）亚稳态分子的扩散系数和猝灭速率常数

Determination of diffusion coefficient and quenching rate coefficient of metastable n_2 molecules n_2 ( a ~ 3 ∑ _ (?) ~ + ) using Townsend discharging

用毛细管法研究了pH值对152154Eu（Ⅲ）在压实皂土中的吸附分配系数和表观扩散系数的影响。

Effect of pH on the sorption distribution coefficient ( K_d ) and apparent diffusion coefficient ( D_a ) of ~ ( 152,154 ) Eu (ⅲ) in the compacted bentonite is studied with the capillary method .