查询词典 evolution

In this paper, we study nonlinear perturbation analysis of mesoscale verticalcirculation and evolution equation by means of f plane, non-hydrostatic balance andfilter model. Outstanding nonlinear characteristic of mesoscale disturbance invertical direction, we obtain nonlinear symmetric disturbance equation anddisturbance amplitude s evolution equation by use of multi-scale and singularperturbation technique.

中文摘要：本文采用f平面、非静力平衡、滤声波模式，讨论了大气中尺度非线性动力学方程，通过尺度分析重点突出了扰动在垂直方向上的非线性特征，从而得到了对称扰动非线性方程，运用多重尺度方法和摄动分析讨论了对称扰动非线性重力惯性波的演化过程，得到非线性重力惯性波振幅演化服从广义的非线性Schrdinger方程。

The evolution tendency of its magma suggests that the Wudalianchi rift belt is still in a course of continuing evolution without a sign of coming to an end.

进一步从岩浆演化的趋势认为五大连池裂谷带将持续演化而不会夭折。

Numerical simulations by assemblies of circular panicles can qualitatively reflect the general characteristics of liquefaction behavior of sand. The interval effect of aspect ratio of elliptical panicle on the mechanical behavior of numerical sample is obtained, and the reason is related to the initial average co-ordination number. The regularity of evolution of fabric in the process of sand liquefaction under cyclic loading can be qualitatively achieved by using the numerical sample randomly mixed of panicles with different shapes. Numerical simulations can not only demonstrate the macro phenomenon of particle breakage, mostly importantly, it can also expose the evolution of particle breakage microscopically, and would contribute to further research of the micromechanics of particle breakage.

研究结果表明：Hertz-Mindlin非线性接触模型适用于变围压条件下砂土力学性质模拟；纯圆颗粒模拟能够定性地反映饱和砂土振动液化的一般规律；颗粒长短比变化对砂土力学性质的影响具有区间效应，其原因与粒间初始平均接触数有关；不同形状随机混合试样能够从定性规律上反映振动液化过程中砂土的细观组构演化规律；数值模拟不仅可得到颗粒破碎宏观响应，而且可以分析内部接触力变化和实现对粘结破裂位置的追踪，从而可进一步研究颗粒破碎细观力学机制。

With the help of latest developed bioinformatics tools, all available Influenza H5A1 strains were explored to deeply under stand their evolution tendency. Methods All H5A1 sequence in NCBI genbank and influenza sequence database were downloaded and aligned, then fast maximizing likelihood method was applied to construct phylogenetic tree, and SRDT model was used to estimate evolution rate and ancestral date for tree branches.

下载NCBI Genbank和美国洛斯阿莫斯国家实验室流感病毒数据库中全部的甲型流感病毒H5A1序列，采用快速极大似然法绘制进化树，并用SRDT模型估计各分枝的进化速度与出现时间。

The features of deep-reaching faults controlling the regional structures in the northeastern area of China were analyzed. Further more, the evolution laws and magmatism of all structural geological units, and their controlling effects on the formation and evolution of basins were discussed.

摘要对东北地区区域构：查进行了研究，分析了对该区有控制作用的各个深而大的断裂的特征，进而研究了各构造地质单元的演化规律、岩浆作用及其对盆地形成、演化的控制作用。

In the early life evolution, the evolution of ecosystem mainly exhibited the development what was from passive accepters to active competitors in life demands for environment factors, from dependence on to reform in the environment, from two-dimension to three-dimension in the spatial distribution, and from outside to inside of organism in the style of energy transformation.

在生命演化的早期，生态系统的演化主要表现为生物从被动地接受环境因子到对环境因子需求的竞争，从依赖环境到参与对环境的改造，生物的环境空间分布从二维到三维，生物的能量传递方式从生物体外到体内。

The formation and evolution of disks are important for the formation and evolution of spiral galaxies, for disks are important components of the galaxies and the most baryons are in disks.

中文摘要：在旋涡星系形成和演化的过程中，星系盘的形成和演化是关键，因为盘是星系的主要成份，大部分的重子物质都包含在星系的盘中。

They found that most of the columbines' nectar spur length evolution happened during shifts in pollinators from bumblebees to hummingbirds, and from hummingbirds to hawkmoths. In between these shifts, evolution of the columbines' nectar spurs came to a halt.

Whittall和Hodges发现，在许多植物中，这种协同进化更具有&一边倒&的倾向，蜜管会随着采蜜者喙的长度而进化，随后这一过程会中止，只有新的采蜜者出现才能让进化过程重新启动。

Evolution favors those that operate with maximum exposure to environmental change and have maximized flexibility. Evolution deselects those who have insulated themselves from environmental change and have minimized chaos and complexity in their environment.

进化的过程喜欢把把环境的改变最大限度地暴露出来，不喜欢将自己和环境的改变隔离，以及将环境的复杂性最小化的行为。

Other outer factors,including technology advancement,demand and its structure,natural resource and government policy have to depend on it.(4) Industry evolution and entrepreneurial innovation evolution is inter-connected and evolutes coordinately.

在具体某一时点上，产业演化可能表现为其中的一种形式，也可能表现为多种形式，至于究竟以哪种形式出现是由企业家创新的类型所决定的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。