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- velocity gradient tensor 速度梯度张量
- In the CGT region,the relation between turbulent Reynolds stress and mean velocity gradient is nonlinear. CGT区域内雷诺应力与平均速度梯度呈非线性关系。
- Objective:To investigate the value of myocardial velocity gradient(MVG) in diagnosis of myocardial ischemia. 目的:探讨跨壁速度梯度(MVG)在诊断心肌缺血中的应用价值。
- In the CGT region, the relation between turbulent Reynolds stress and mean velocity gradient is nonlinear. 逆压梯度时，湍动能负产生率区域不复存在，此时CGT区域从有到无，也是呈 先增大后缩小的趋势，并最终消失；
- While the half angle increases, velocity gradient in a microdiffuser decreases and so does the average vorticity. 此外，受到流道内部速度梯度降低的影响，平均涡度值会随半角增加而下降。
- Updated Lagrangian formulations and hyperelastic-plastic constitutive relations based on elasto-plastic multiplictive decomposition of the deformation gradient tensor are given first of all. 首先给出了纠正的拉格朗日有限元公式和基于弹塑性乘法分解的超弹性塑性本构关系。
- The results showed large pressure gradient and velocity gradient of the material in the four intermeshing regions. 计算结果表明:四螺杆的四个啮合区具有较大的压力梯度、速度梯度,其混合性能明显好于双螺杆挤出机。
- The above mentioned detachment is characterized by wedge with negative velocity gradient (shown with LVL) above R1 interface between Samada and Dagyi. （2）上述拆离层在萨马达一达吉之间，以R1界面之上的负速度梯度楔状体（LVL）为特征。
- Then the authors explain hypostasis of the velocity gradient and vortex, and make a try to unify the vortex coagulation theory and the conventional coagulation theory. 从根源上解释了紊流流场中速度梯度和旋涡的产生，试图把最近发展的涡旋混凝理论与传统的混凝理论进行统一。
- The pressure gradient and velocity gradient of the extrudate in the central area were small, and the extrudate fllowed slowly in the central area, having high viscosity. 中心区的物料压力梯度和速度梯度都较小，物料在中心区流动缓慢，中心区的物料粘度值较大；
- The results show that a large velocity gradient emerges in the intermeshing region of the screw reactors, which is helpful to mix materials sufficiently. 结果表明，螺杆反应器的啮合区具有较大的速度梯度，有利于物料的充分混合。
- Velocity|related indices derived from MPD including peak velocity of S wave, E wave and A wave, A/E and MVG (myocardial velocity gradient) were applied for the detection of WMA. For evaluation of WMA, left ventricle was divided into 20 segments. 用于室壁运动分析的 MPD速度指标为 S波、E波、A波的峰速度 ,A/ E比值及跨壁速度梯度 (MVG)。
- This paper analyses the kinematic characteristic of underwater EFP by using finite element analysis software ANSYS/LS-DYNA,and studies preliminarily the variation of the EFP's velocity gradient and shape in water with time. 本文以EFP本身为研究对象,利用有限元分析软件ANSYS/LS-DYNA对鱼雷聚能战斗部EFP在水中的运动特性作了数学仿真分析,模拟了EFP在水中运动自身的速度梯度、EFP的形状等随时间的变化,对EFP在水中运动自身的速度梯度和形状等参数随时间变化规律做了初步研究。
- The method is testing the particle sheer stress, velocity gradient at different speed of rotation by adopting different particle density and different particle diameter suspensions. 试验结果与拜格诺试验的结果完全一致，将其结果延伸，所采用的试料更加符合生产实际。
- The ratio of the magnitude of an applied shear stress to the velocity gradient that it produces; that is, a measure of a noncrystalline material's resistance to permanent deformation. 剪切应力数值与其产生应变速率的比值叫粘性,用来衡量非晶材料抵抗永久变形的能力。
- Comparing with the incompressible flow, nonlinear pressure distribution is obtained due to the compressibility effect.Both pressure and velocity gradient reach the maximum value at the outlet. 与非压缩流场比较，压缩效应使得压力分布呈非线性分布，且在出口处压力梯度与速度梯度同时达到最大值。
- Computer-Aided Transformation of Gravity Vector and Its Gradient Tensor Between Coordinate Systems 引力向量及梯度张量在坐标系之间的变换
- shallow water with negative sound velocity gradient 负声速梯度浅海
- Gazelles can move with astonishing velocity. 羚羊跑起来速度惊人。
- Lashing velocity of pump is concerned with nature of air. 泵的抽气速率与气体的性质有关。
