讨论了温度、压力、速度梯度对保护储效果的影响。
The influence of temperature, pressure and shear rate on formation damage are also discussed.
空化区和主流区的汽液交界面处存在着较大的速度梯度；
In the cavitation area, the lower-velocity region moves from the foil's middle part to the downstream with the decrease of the cavitation number.
用速度梯度、压力梯度和环量梯度模拟大攻角尖前缘三角翼流场。
Velocity gradient, pressure gradient and circulation gradient are used to model the separated vortex flow field over a leading edge delta wing.
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。
The results show that a large velocity gradient emerges in the intermeshing region of the screw reactors, which is helpful to mix materials sufficiently.
近壁对总压测量影响不大。速度梯度和近壁对测量误差的影响还与来流方向有关。
The effects of the velocity gradient and wall-proximity on the measuring errors are related to the flow direction.
在激光材料加热中，由于存在着表面张力驱动的流动，熔池表面附近熔体的速度梯度很大。
A thin surface layer always exists near the surface of laser heating melt pool due to the fluid flow driven by the surface tension gradient.
本文介绍一种用黏度图来确定任一速度梯度下黏度的方法，所定黏度更接近井眼实际情况；
The paper introduces a method that utilizes viscosity diagram to determine viscosity under any speed gradient. The viscosity defined is more close to the practical condition of well bore.
这样回避了速度梯度间断的困难，缓和了出口处应力奇性引起的矛盾，同时又减少了计算量。
Thus the difficulties of discontinuous velocity gradient and the stress singularity at the exit point are avoided, and the expense of computation is reduced.
结果表明，束的密度梯度和速度梯度使系统的不稳定性加剧，离子束的定向运动能量损耗更快。
The results show that the instabilities become stronger due to these gradient effects, leading to an increase in energy loss of the directional motion of beams.
分析了摇摆运动对非牛顿流体和牛顿流体流动速度的影响和速度峰值与管壁处的速度梯度的变化规律。
The effect of rolling motion on the flowing velocity of Newtonian fluids and Non-Newtonian fluids is analyzed. The variation of peak velocity and velocity gradient in the wall is also investigated.
建立了局部(塑性)剪切变形梯度与局部(塑性)剪切应变分布之间的关系及速度梯度与应变率分布之间的关系。
The relation between the gradient of local (plastic) shear deformation and the local (plastic) shear strain and that between the gradient of velocity and the strain rate were established.
对制备色谱的洗脱方式、洗脱剂组成、浓度、洗脱速度等参数进行优化，提出并应用了流动相速度梯度洗脱方法。
The elution mode, composition of the mobile phase, content of the organic acid and the flow-rate of the mobile phase were optimized and thus a new flow rate gradient was proposed.
本文叙述了电化学法测量的原理，介绍了用一半圆电极对同时测量壁面上二维湍流速度梯度脉动的方法和测量结果。
This paper describes the principle of such a measurement, and a semicircular electrode pair is suggested for the measuring of the two dimensional fluctuations of velocity gradient on the wall.
在实践中应用该理论涉及到两个问题：一是如何将实验测得的数据整理成边界极限速度梯度，二是如何利用边界极限速度梯度反过来指导实践。
The first, how to sort out data coming from experiments by the theory of boundary velocity gradient; Secondly, how to apply the data in practice.
梯度使气流方向测量值向负梯度方向偏转。圆柱探针和锥形多孔探针相比，气流方向测量误差对速度梯度更敏感，纵向梯度对俯仰角测量值的影响尤其大。
The velocity gradient, especially the perpendicular velocity gradient, leads the measuring error of flow angle with cylindrical probe to be larger than with conical multi-hole probe.
我们知道梯度向量垂直于这个向量，而速度向量是相切于等值面的，其他相切于等值面的向量，又如何呢？
We know that the gradient is perpendicular to this vector that's tangent to the level surface What about other vectors tangent to the level surface?
在感应淬火中，通过改变加热时间、加热功率和冷却速度可以改变淬硬层深度和硬度梯度。
The hardening case depth and hardness curve can be changed by adjusting heating time, heating power and cooling speed during induction hardening.
考虑了混凝土多相系统中固体速度、饱和度乘蒸汽密度的空间梯度和孔隙压力空间梯度；
The model includes solid velocity, space grade of saturation with vapour density and space grade of porous pressure in concrete multiphase system.
仿真结果显示，自然梯度算法比传统梯度算法收敛速度更快，分离效果更好。
Simulation results show that the natural gradient approach has faster convergence speed and better separation performance than the conventional gradient based algorithm.
本文提出了利用平均径向速度分析压力梯度的方法。
The method to analyze the pressure gradient with mean radial velocity is used.
计算结果表明，这种新方法不但能估计压力梯度，而且还能给出浆体速度分布。
The computed result shows that this new method can not only predict the pressure gradient but can also give the velocity profile.
本研究设计了适用于GPS单点定位计算的BP人工神经网络模型结构，采用共轭梯度算法改善网络的训练速度和精度。
The BP network architecture applied to determine GPS standalone position is designed. Meanwhile, the conjugate gradient algorithm is used to improve the training velocity and accuracy of the network.
且当表观气速增大，初始流体流动处于由均匀流型向过渡流型的转变，轴向液体速度在径向的梯度非常小；
With increasing of superficial gas velocities, the liquid flow regime was changed from homogeneous to transitional and radial gradient of axial liquid velocity was rather small.
水平集方法的速度函数定义根据所利用的图像信息可以分为两大类：基于图像梯度和基于图像灰度信息。
The speed function defined in Level set method can be divided into two classes: function based on the gradient of image and function based on the image gray.
我们可以假定，在空隙空间的一个数学点上液体质点的局部速度和浓度梯度之间无相关性。
We may assume that there is no correlation between the local velocity of a liquid particle at a mathematical point inside the void space and the concentration gradient.
通过计算图像梯度信息，选取边缘区域像素作为控制点，既改善减影图像质量，又提高运算速度。
The quality of the subtraction image was improved and computation time was reduced by selecting edge pixels as triangular control points.
越靠近自由表面，底部射流横向发展越窄，而向上的压力梯度，气泡上升速度，底部射流上升高度越大，反之则反；
The more the bubble close to the free surface, the narrower the bottom jet develops crosswise, and the larger the pressure gradient, the rising velocity and the height of the bottom jet is upwards.
以琥珀腈为研究对象，用设计的定向凝固实验体系，研究了不同温度梯度和界面生长速度对固液界面形貌的影响。
The effects of temperature gradient and interfacial growth velocity on solid-liquid interface morphology were studied with succinonitrile under the unidirectional solidification system.
对适当范围的温度梯度，凝固速度较小时通道偏析易于形成。
Within a suitable range of temperature gradient, channel segregation is easy to develop when solidification rate is slow.
对适当范围的温度梯度，凝固速度较小时通道偏析易于形成。
Within a suitable range of temperature gradient, channel segregation is easy to develop when solidification rate is slow.
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