查询词典 Evolution

According to instantaneous velocity fields and vorticity fields measured with SPIV, detailed analysis of the evolution of tip leakage vortex at both design and near stall conditions is presented in this thesis and the different phases of the evolution of the tip leakage vortex, the formation, becoming unstable and the interaction between small-scale vortices and the mainstream can be clearly observed in the experiment results.

SPIV测量结果表明压气机转子叶尖泄漏涡在设计和近失速状态下均存在形成、发展壮大和失稳分裂的演化过程。

On the basis of this ,the paper discussed the different evolution stage accompany with the core industry's evolution and the dissimilarity for produce evolve a stage of policy direction.

在此基础上，论述了产业集群伴随着核心产业的演变而产生的不同的演进阶段以及不同演进阶段的政策导向。

Extending the dynamic evolution model of technology standard with network externality to the case of multi firms, based on a stochastic dynamic game model and exploring intensively the effect of network externality on the technology evolution.

但对于新进入厂商而言，它可以选择兼容或不兼容；如果新进入厂商采用适配器和互联等兼容策略，则在位厂商只有掌握了足够的网络规模基础优势，才会拒绝新进入厂商与其兼容，否则它将会选择与新进入厂商兼容。

A good many mico-landblock of the early Neoproterozoic-Cambrian volcanic rock that distribute in the Tianshan orogenic belt and on its both sides, and the Carboniferous-Permian volcanic rocks that widely distribute in the Tianshan and adjacent regions are selected for subject investigating in this paper. Renewing the ocean-land format and ocean-land conversion process of Tianshan orogenic belt in the Paleozoic is the masterstroke for this paper. On the basis of detailed field investigation, many subjects, such asregional lithology、geochemistry、structural geology、volcanic sedimentology geology、sotope geochronology and synthesis analysis study of geophysics data, are adopted as instrumentality in the paper, this study lays emphasis on the formation, evolution and dynamics of early Neoproterozoic-Cambrian and Carboniferous-Permian volcanic rock in the Tianshan and its adjacent regions to find out Carboniferous-Permian volcanic rock property, eruptive sequence, time and space distribution characteristics, to resume and reconstruct evolution process of Carboniferous-Permian volcanic rock, and to explore connection of magmatism process and lithosphere stretching action of neopaleozoic ocean-land transformation in the Tianshan region.

本文选择分布于天山及其两侧的诸多微陆块上新元古代—早寒武世火山岩和天山地区广泛发育的石炭纪—早二叠世火山岩为研究对象，以恢复重建天山造山带古生代洋陆格局和洋陆转换过程为主线，在详细的野外工作基础上，综合运用区域岩石学、地球化学、构造地质学、火山沉积学、同位素地质年代学、区域地球物理资料综合分析研究等多学科手段，重点研究天山及其邻区新元代—早寒武世和石炭—二迭纪火山岩系的形成演化及其动力学，查明天山石炭纪火山岩系的性质、喷发序列、时空分布特点，恢复重建其形成演化过程，探索天山地区晚古生代洋陆转换过程中火山岩浆作用与岩石圈拉伸作用的关系。

The main purpose of careful observations on external appearance and internal anatomy is to throw light on the evolution of the modem family Pinaceae:To Pinus, attention is paid to the relation of different subgenera, sections and subsections; to Pseudoaraucaria and Pityostrobus, through analysis of the extinct types, trying to clear the evolution relations among all genera so as to finish the systematic tree is of most importance. Currently there are two hypotheses, i.e. Pinus center theory and Pseudoaraucaria branch theory.

对松科化石球果进行细致的外部形态及内部结构的研究主要目的在于演化关系的探讨上：对于Pinus，主要探讨这个属内各个亚属、组、亚组之间的演化关系；对于Pityostrobus和Pseudoaraucaria，通过绝灭类型的分析，探索松科内各个类群的演化关系进而完成进化树是研究的主要方向，现在这方面已有了Pinus中心说及Pseudoaraucaria分支说两个假说。

The simulation of CBM evolution history indicated that CBM evolution history in Sunan syncline area could be classified into four stages.

分析了本区构造史、埋藏史和热演化史，对宿南向斜煤层气演化史进行的模拟计算。

Chapter 2 is devoted to study of exact solutions of the nonlinear evolution equations. Using solutions of a Bernoulli equation instead of tanh in tanh-function method we find some more general solutions of the KdV-Burgers-Kuramoto equation , and by using the nonlinear telegraph equation we show that there are many different choices on its balancing number m and the power n of the nonlinear term in Bernoulli equation by which we can recover the previously known solutions and also can derive new square root type solitary wave solutions. Exact solitary wave solutions for a surface wave equation are obtained by means of the homogeneous balance method. We also present an approach for constructing the solitary wave solutions and non-solitary wave solutions of the nonlinear evolution equations by using the homogeneous balance method directly, which is also used to find the steady state solutions, solitary wave solutions and the non-solitary wave solutions of the 2+1 dimensional dispersive long wave equations. The soliton-like solutions of the BLMP equation and the 2+1 dimensional breaking soliton equation are found by use of the symbolic-computation-based Method.

第二章中研究了非线性发展方程的精确解：用双曲正切函数法中的双曲正切函数换为Bernoulli方程的解的方法而给出KdV-Burgers-Kuramoto方程的精确解并用非线性电波方程为例说明了平衡数m和Bernoulli方程中非线性项的次数n有着多种选择的可能，它不但使我们能找到已知解而且也能找出新的根式孤立波解；用齐次平衡法给出一个曲面波方程的精确孤立波解，并提出直接用齐次平衡法寻找非线性发展方程的孤立波解、非孤立波解的方法，作为应用给出2+1维色散长波方程组等的定态解、孤立波解、非孤立波解等；用Symbolic-computation-basedMethod获得BLMP方程和2+1维破裂孤子方程的类孤子解；提出sine-Gordon型方程的直接求解方法，并获得sine-Gordon方程、双sine-Gordon方程、sinh-Gordon方程、MKdV-sine-Gordon方程和Born-Infeld方程等的精确孤立波解。

The text analysis the influential aspects through the theory of institution evolution, time series analysis and the theory of supply and demand, the result is that all the influential aspects impelled the evolution of ownership of forests system in Hebei province.

以制度变迁理论、时间序列分析和供求理论对相应因素进行深入分析，结果显示：诸多动因相互作用推动了河北省林权制度的演进。

This implies that at some point during the evolution of the human species a type of social learning leading to cumulative cultural evolution was evolutionarily advantageous.

这意味着，在人类进化的某个时期，导致累积文化进化的社会学习类型有着进化上的优势。

The thesis has investigated into the evolution of the matching frame of the two kinds of conjunctions "sui" and "dan" in Chinese history in an all-around way, and probed into the feature of their evolution ,and explained why they have evolved in such way from the typologic angle.

文章较全面地考察了汉语各个历史时期的"虽"类和"但"类连词匹配框架的发展演变，探究它们的发展特点，并从类型学的角度解释其发展演变的重要原因。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。