扩散梯度

薄膜扩散梯度（DiffusiveGradientsinThin-Filmstechnique，DGT）技术已经广泛地被应用于水、土壤、沉积物环境中重金属有效态的原位采样和测量。

The diffusive gradients in thin-films ( DGT ) is a technique that has been used to the measurement of labile metals in waters , soils and sediments .

巯基改性聚乙烯醇为结合相的薄膜扩散梯度技术

Preparation of Thiol-Polyvinyl Alcohol and Its Application to Diffusive Gradients in Thin-Films Technique

聚丙烯酸钠为结合相的薄膜扩散梯度技术对水中重金属的选择性测量

The selective measurement of heavy metals by diffusive gradients in thin-films technique with sodium polyacrylate as the binding phase in water

心肺系统是人体在完成最大全身运动时最大摄氧量的限制因素，而骨骼肌内外周氧扩散梯度及线粒体容量是人体在完成局部肌肉活动或单侧肢体运动时起主要限制作用。

At the whole body being in maximally intense exercise , the lung and the heart are the main factors , while the oxygen diffusion and the mitochondrial content are more important at the isolated skeletal muscle being trained .

本研究基于影响大气污染程度的源参数、气象条件和近地层下垫面的状况，根据湍流扩散梯度理沦进行推导，建立了拉格朗日烟团扩散模型。

According to Turbulent Diffusion Theory , this thesis uses impact of air dilution and diffusion factors such as air pollutant source parameters , weather factors and near underlying surface layer status to establish a Lagrange Air Pollutant Diffusion Model .

目的：研究高扩散敏感梯度（高b值）扩散加权像的定量指标在早期缺血性中风诊断中的应用，探讨高b值DWI上异常高信号征象的诊断与鉴别诊断。

Objective : To study the application of high b value diffusion weighted imaging ( DWI ) qualitative analysis for diagnosis of brain ischemic stroke . To investigate the differential diagnosis of the diseases .

植物花粉、种子湍流扩散的梯度&输送模型

The Gradient Transport Model of Turbulence Dispersal of Pollen and Seeds

扩散敏感梯度磁场对核自旋运动的影响

Effect of diffusion sensitive gradient magnetic field on the movement of spins

一个大气扩散的梯度-传输理论模式及其应用

A model of K-theory for atmospheric diffusion and Its Applications

扩散敏感梯度相关图像变形规律与矫正技术研究

Study of the distortion induced by diffusion sensitive gradient and the correction technique

本文研究了处于扩散敏感梯度磁场中核自旋所受附加外力，并分析了这个外力对核自旋自由扩散的影响。

The effect of powerful diffusion sensitive gradient magnetic field on the movement of spin was studied .

应用气体热力学、动力学、湍流扩散的梯度理论和统计理论，进行建模前的基础分析。

Gas thermodynamics , kinetics , turbulent diffusion gradient theory and statistical theory are applied to do the based analysis before modeling .

扩散敏感梯度磁度的方向及强度是磁共振扩散成像实验的重要参数，但这二个参数不能由用户通过设备自带的软件设定。

The strength and the direction of diffusion sensitive magnetic gradient field are important experimental parameters in magnetic resonance diffusion imaging , but these parameters cannot be modified by user of the software .

在微流体腔内利用高低折射率液体的扩散构成梯度折射率的二维分布，并使用流速来控制折射率分布和对焦点进行调节。

The two dimensional profile of gradient refractive index is achieved by diffusion between high and low refractive index liquids in microfluidic chamber . The refractive index profile and focal point can be adjusted by flow rates .

通过梯度向量扩散与梯度流跟踪，细胞图像被分割成很多个仅包含一个细胞和周围背景的小区域；然后使用自适应阈值法成功地从每一个小区域的背景中提取独立的细胞。

After gradient vector diffusion and gradient flow tracking , the cell image is separated into some small regions , each region containing one cell and its background . Local adaptive thresholding is performed for each small region , the single cell can be extracted from the background .

由此，扩散耦合和梯度耦合的作用变得非常清楚。

The effects of both diffusive and gradient couplings on the chaos synchronization are explicit .

在低信噪比图像滤波中，各向异性扩散方程中梯度区分边缘和噪声不够理想。

In low SNR images filtering , the gradient in the original anisotropic diffusion discriminate between edges and noise is not ideal .

6年中不动杆菌属耐药性变化与抗菌药物使用频度分析应用纸片扩散法与梯度浓度法测定不动杆菌属的耐药性

Acinetobacter Resistance and DDDs of Commonly Used Antibacterial Drugs : A 6-year Surveillance Study Assay of Acinetobacter SPP drug-resistance by Kirby-Bauer and Etest method

对于一类同时存在扩散耦合和梯度耦合的非线性振子系统，通过空间傅里叶变换，得到具有不同波矢的各运动模式的相互独立的运动方程。

For a coupled nonlinear oscillator system with diffusion and gradient couplings , spatial Fourier transformation is performed and the dynamic equations of various space modes are derived .

这里利用成熟的室外大气污染物扩散理论-梯度输送理论和箱模式理论，提出焊接烟尘在室内的扩散模式和浓度分布的理论计算方法。

In this paper , the diffusion model and the theoretic calculation method of welding dust are given by gradient transportation theory and box model for outdoor atmospheric pollutants .

界面及两侧合金元素扩散的浓度呈梯度变化，尤其Al元素在焊缝中扩散的浓度梯度最显著。

The concentration of alloy elements of interface and both side of interface change by grads , especially , aluminum obviously change by grads on welding seam .

因热扩散、含水率梯度引起的水分迁移可以忽略不计。

Moisture transfer caused by heat diffusion and a moisture content gradient could be neglected .

这就更利于空位机制扩散，化学势梯度也相应增加。

This would be propitious to the diffuse of vacancy mechanism , and accordingly the chemical .

影响韵律形成的因素很多，通常包括岩浆成分、对流作用、扩散作用、热梯度、氧逸度、温度和压力等。

These factors include magma composition , convection , diffusion , thermal gradient , oxygen fugacity , temperature , pressure , the shape of magma chamber etc.

不平衡产业结构是产生经济增长的动因，区际产业合作（产业化空间扩散）是产业梯度存在的必然结果，并不断推动全球产业结构朝着平衡方向发展。

The unbalanced industrial structure is the drive for economic increase , and the regional interactive cooperation is the inevitable result for " business difference ", which pushes global industrial structure toward balance .

环境监测中两种原位被动采样技术&薄膜扩散平衡技术和薄膜扩散梯度技术

In-situ Passive Sampling Techniques for Environmental Monitoring-Diffusive Equilibrium in Thin-Films and Diffusive Gradients in Thin-Films Technique

通过引入物理学中场的概念，建立了知识扩散场，以探讨知识扩散的梯度、散度以及知识扩散的规律&供求平衡原则和梯度最小原则；

By introducing the concept of field in physics , the field of knowledge diffusion was set up to explore the gradient and divergence of knowledge diffusion field , and the laws of knowledge diffusion & the principle of supply-demand equilibrium and gradient minimization .

新模型在传统的热方程的基础上，在梯度方向引入扩散函数后，引导扩散，使得扩散在梯度方向根据图像的特征来实施不同程度的平滑，从而保护图像的边缘信息。

Based on the classical heat diffusion model , a diffusion function is introduced in the gradient direction , which can make the diffusion occur according to the characteristic of an image .

对Al/AZ31界面扩散层的局部显微硬度表征表明，扩散层存在硬度梯度。

The Vickers hardness shows that there exists gradient hardness at the Al / AZ31 interface diffusion layer .

方法对20名成年健康志愿者行头部扩散张量成像，比较不同扫描参数（层厚/层间距、b值及扩散敏感梯度方向数）对图像质量的影响。

Methods Diffusion tensor imaging of the head was performed in 20 healthy adult volunteers . Different parameters including slice thickness , b value and the number of the diffusion sensitive gradient direction were applied and their impaction on the quality of the images were compared .