迁移的

A model is developed to analyze the tradeoff between benefits and costs involved in the strategies for the normal dvm of copepod . the venturous revenue is used as the criterion for this optimal tradeoff . it is a function of the environmental factors and the age of copepod

本文提出一个桡足类常规的昼夜垂直迁移模型，以分析桡足类在垂直迁移的决策过程中对利益和风险的权衡机制，风险收益被用来作为这种权衡机制的优化目标，它是环境因子和桡足类年龄的函数。

Besides, a nonlinear mathematical model is established on the base of non-equilibrium thermodynamic theory and phase equilibrium principle.

从非平衡态热动力学和相平衡的角度，推出了非饱和多孔介质的热湿迁移的数学控制方程，根据本文所研究的对象，对该控制方程进行了简化，建立了蔬菜热湿迁移的一维非线性数学模型，并给出了求解该数学模型的定解条件。

At first, the article explores the factors causing the migration and conglomeration of population mobility and migration, by constructing the microeconomic model of population floating. Then, based on the analysis of the spatial distribution of population and industry, the article draws a conclusion that the population conglomeration of pro-developed region should adapt to the process of industry conglomeration, and the other developing region should adjust to the both the process of inverse flow of population refluence and the industry transformation.

通过构造人口流动迁移的微观经济模型，掌握人口流动、迁移和集聚的动因；通过人口与产业的空间布局分析，说明泛珠三角区域先发展地区的人口集聚与产业集聚过程应该相互适应，而后发展地区的人口"回流"与产业转移过程更应互为补充。

We are interested in the molecular mechanisms underlying neuronal migration and our work published in 1999 indicates that there are diffusible molecules in the brain which can guide the direction of migrating neurons; specifically, a secreted protein called Slit is repulsive to neurons and its concentration gradient guides neuronal migration.

我们在分子水平对这个问题进行了研究。1999年发表的结果给出这样一个答案：脑内存在导向性分子，可以指导神经细胞的迁移方向；具体的发现是，一个叫Slit的分泌性蛋白质，对神经细胞有排斥性作用，它的浓度梯度指导神经细胞迁移的方向。

The results showed that HGF not influenced the proliferation and osteogenic differentiation of bone marrow-derived mesenchymal stem cells.

结果表明，重组人HGF不影响骨髓间充质干细胞的增殖和向成骨细胞的分化，但可明显促进骨髓间充质干细胞的迁移并抑制anoikis诱导的细胞凋亡；PI-3K和MAPK途径参与了HGF促进细胞迁移的作用。

Methods Porcine coronary SMCs were incubated with serum-free medium containing different concentrations of simvastatin. Infiltration of 3H-TdR into SMC DNA was measured as an index of cell proliferation. Simvastatin's effect on migration was tested with Sarkar's technique.

采用体外猪冠状动脉SMC培养技术，以3H-TdR的参入量表示冠状动脉的SMC DNA合成情况，应用划线方法测定冠状动脉SMC的迁移距离，观察辛伐他汀对OX-LDL诱导的冠状动脉SMC增殖和迁移的影响。

Different non-directional cell migration,but migration of cells in the same direction is constant.

不同的细胞有不定向的迁移，但同一个细胞的迁移的方向是恒定的。

ABSTRACT Appling the numerical model and control theory to the state identification of carbon migration in dissimilar metal weldments , its law and quantitative calculation were researched. Based on analysising of metallurgical and dynamics properties of DMWs, the influences of welding procedure's factors on their high-temperature properties were studied in this dissertation. The following are the main contents.

本文将数值化建模和控制理论引入到异种钢焊接接头碳扩散迁移状态辨识，对碳的扩散迁移的规律及定量计算进行了研究，在对异种接头冶金性能和力学性能进行分析的基础上，对焊接工艺因素对接头性能的影响进行了研究，主要内容如下： 1。

"We found the bird flu virus H5N1 is now also in migrating geese, ducks and other wild fowl and probably moving across the world as flocks migrate beyond the area of the center of current avian flu epidemic," he added.

他进一步的说明：「我们目前也在一些迁移的鹅、鸭和其他野鸟禽类身上发现H5N1禽流感病毒。而这些病毒，也可能由目前的禽流感流行中心区域，伴随著鸟群的迁移，扩散到全世界其他的地方。

Particularly in east Africa, the loss of land to national parks, game reserves, hunting blocks and conservation severely restricts pastoral mobility as much of this land either consists of critical dry- or wet-season grazing or cuts across seasonal migration routes.

特别是在非洲东部，国家公园、猎物繁殖保护区、狩猎区及保护区侵占了大量的土地，从而使游牧迁移受到了严重的限制，因为这些土地不仅包括旱季和雨季主要的放牧区，而且还切断了季节性迁移的必经之路。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。