迁移

Migration of chemical substances from food packaging materials into foodstuffs obeys Fick's laws of diffusion in most cases.

食品包装材料中物质迁移的数学模型大都基于菲克扩散定律。

The O2 concentration field of a cylindrical soil bed with winter wheat growing is obtained by means of steady numerical simulation, which shows that the soil O2 concentration has a close relation to the growing stage of the winter wheat, the porosity of the soil and the height of the soil bed , et al.

建立了一个描述土壤中热、湿、气耦合迁移的数学模型，对有冬小麦生长的圆柱形土壤床中的氧气浓度场进行了数值模拟。

It is found that a well-controlled pulse area is required for complete population transfer from if the dressing field is sufficiently strong and on resonance.

研究发现如果缀饰激光场足够强且发生共振，则在能级1 和能级4之间发生完全布局数迁移必须要求有一个恰当的脉冲叠加面积。

Even-level ladder system has been analyzed for population transfer by counterintuitive frequency-chirped laser pulse, in which intermediate states are strongly coupled by dressing laser field.

利用"反直觉"频率啁啾激光脉冲分析了偶能级ladder系统的布局数迁移，其中在缀饰激光场作用下N-2个中间态进行耦合。

The influence of sound field intensity on removal efficiency was studied, as well as the shift features of particle size distribution.

利用该实验平台，研究了声场强度对细颗粒清除效率的影响以及颗粒粒径分布的迁移特性。

Every year's resiting foremost people in the field stem from our school.

每年的迁移最重要的人在外地干从我们的学校。

The migration of latex binder in filter paper was studied in this paper.

摘 要：针对滤纸中增强乳液树脂在干燥过程中的热迁移现象进行了较为系统的研究。

This model used the finite—difference approximation to the advection— dispersion equation. The spatial derivatives in the flow equation are approximated by central difference written about grid—block boundaries and time derivatives are approximated by a fully implicit backward scheme.

水流方程的空间导数采用中心差分格式离散，时间导数采用隐式差分格式离散，建立了土壤水分和污染物在各种饱和度的条件下迁移转化方程耦合求解的二维数值计算模型。

Most striking/among the many asymmetries evident in an adult flatfish/is eye placement: before maturity one eye migrates, so that in an adult flatfish both eyes are on the same side of the head.

/在很多的成年比目鱼所表现出来的不对称中/，眼睛的位置是最引人注目的：在成熟以前一个眼睛迁移了，以致于在一个成年鱼的身上，两只眼睛都在身体的同一侧。

Effects of time, water flux density, and distribution coefficients of metal ions on the migration and concentration distribution of heavy metal ions were also simulated in soil.

分析了时间、水的通量密度、金属离子的吸附分配系数对金属离子在土壤中迁移及浓度分布的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。