网格抛分使模拟计算的纵向弥散度变化的主要原因是数值弥散。
The changes of longitudinal dispersivity with the grid sizes were mainly caused by numerical dispersion.
结果表明该法能消除大部分的数值弥散，而且又不增加解的振荡性。
It is showed that the method can dispel most numerical dispersion and the vibration of solution doesn't increase.
流线模型不存在数值弥散和不稳定性，比传统的数值模拟速度快，允许节点多。
The streamline model overcomes the numerical dispersion and instability, is faster than the conventional numerical simulation and allows for more nodes.
通过将该半解析解与忽略扩散的数值解进行对比分析，讨论了数值弥散代替物理扩散的条件。
Then this paper studied the effect of diffusion coefficient on concentration distribution and the conditions of substitution with numerical dispersion for physical diffusion.
求解一般抛物方程所采用的标准有限元或有限差分法会产生难以接受的数值震荡和数值弥散；
Standard numerical methods solving these equations often produce nonphysical oscillations, and upwind methods usually cause excessive numerical diffusion which smear the sharp fronts.
本文通过对淋滤液运移模型的研究，给出了多孔介质和双重介质淋滤液运移模型的定解问题，采用广义迎风格式求解淋滤液运移模型，消除数值弥散。
Equations of transport model of leachate for porous media and double media are given. Generalized upwind scheme is used to solve the transport model of leachate and to eliminate numerical dispersion.
由于对流为主的弥散方程具有双曲性质，中心差分格式虽然关于空间步长具有二阶精度，但会产生数值弥散和非物理力学特性的数值振荡，使数值模拟失真。
Due to the hyperbolic properties of convection-dominate dispersion equations, the central difference formula often cause numerical dispersion and oscillation even it has two-order precision in space.
每个参与者研究的测量结果被转化成一种叫做表现弥散系数(adc)的数值。
For the study, measurements were translated into scores called apparent diffusion coefficient (ADC) values for each of the participants.
数值模拟的结果表明，有弥散器的催化转化器的流动均匀性优于常规结构的催化转化器。
The numerical simulation results show that the flow uniformity of catalytic converter with deflector is higher than that of the conventional catalytic converter.
结果表明，三次样条方法在带有放射性衰变的水动力弥散方程的数值计算中，对抑制数值耗散是一种有效的方法。
It is shown that cubic spline method is effective for restraining numerical dispersion in numerical simulation of hydrodynamic dispersion equations with radioactive decay.
通过数值计算研究超绝热燃烧的形成、以及弥散效应、当量比和多孔介质材料本身对超绝热燃烧特性的影响。
The influences of reaction mechanisms, radiation models, dispersion effects, and variations of physical, thermal and transport properties on numerical results are discussed in detail.
将其应用于含弱非线性效应的缓坡方程进行数值验证，结果表明，采用新的非线性弥散关系得到的计算结果与实测结果更为吻合。
The results show that the model using the new dispersion relation can predict the wave transformation over the complicated bathymetry quite well.
通过数值计算给出了弥散曲线的前十个分支。
The first ten branches of the dispersion curves were depicted graphically by the numerical calculation.
对轴对称稳态热传导问题的弥散逼近数值解作了初步研究。
We have made initial researches on the diffuse approximate solution for stable axisymmetric heat transfer problems.
目的：探讨不同弥散强度对弥散张量成像中表观弥散系数值及部分各向异性指数值测定的影响。
Purpose: To study the effect of different diffusion weighting on ADC and FA measurements of normal brain.
各期病灶表观扩散系数值及在弥散加权成像上信号不同。
The signals on ADC value and DWI of the focus were different in various stage.
本文对具有初始几何形状及维里系数相同，但初始速度弥散度分布不同的三轴椭球进行了数值模拟。
In this paper, the configuration of triaxial ellipticals with different initial dispersion velocities is studied by numerical simulation.
为进行连续介质到非连续介质转化的数值模拟，实现结构破坏过程的仿真分析，将固定和旋转的弥散裂缝模型与变形体离散元方法结合应用于混凝土、岩石等准脆性材料的受拉开裂过程分析。
Fixed and rotating smeared-crack models based on a deformable distinct element method were developed to analyze the fracture of quasi-brittle materials such as concrete and rock under tension.
结果未注酒精组大鼠脑的磁共振弥散加权成像未见异常信号改变，其表观弥散常数值亦未见随时间而改变。
Resultsthere were no abnormal signals on DWI image of non alcohol injection group, and ADC value didn't change at different point of time.
重症急性酒精中毒死亡组大鼠脑的磁共振弥散加权成像均出现高强度信号，表观弥散系数值在短时间内骤降。
Abnormal high signal can also be seen on DWI image of severe alcoholism dead group, and ADC value showed a sudden drop in a short term.
重症急性酒精中毒死亡组大鼠脑的磁共振弥散加权成像均出现高强度信号，表观弥散系数值在短时间内骤降。
Abnormal high signal can also be seen on DWI image of severe alcoholism dead group, and ADC value showed a sudden drop in a short term.
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