查询词典 divergence theorem

In the second chapter, we consider a kind of Kolmogorov system. The sufficient condition for nonexistence of the closed orbit and existence of the unique and stable limit cycle are obtained by using divergence integral, Poincare-Bendixson theorem and Zhang Zhifen\'unique theorem.

第二章讨论了一类Kolmogorov系统，利用发散量积分、环域定理和张芷芬唯一性定理，得到了该系统无闭轨的充分条件和存在唯一极限环的条件。

State Key Laboratory of Millimeter Waves, Southeast University , Nanjing 210096, ChinaIn this paper, it is proven that the divergence relationship of electric-field and magnetic-field is non-zero even in charge-free regions, when the electric-field and magnetic-field are calculated with Alternating Direction Implicit Finite-Difference Time-Domain method, and the concrete expression of the divergence relationship is derived.

摘要该文证明了即使在无源区域，交替方向隐式时域有限差分法所给出的电磁场量不满足零散度关系，同时推导出了该散度关系的具体表达式。

Phylogenetic analysis suggests that the batrachian divergence occurred in the Middle Permian, rather than the late Carboniferous as recently estimated using molecular clocks18, 22, but the divergence with caecilians corresponds to the deep split between temnospondyls and lepospondyls, which is congruent with the molecular estimates.

谱系分析认为蛙形两栖类的分歧应发生于二叠纪中期，而不是石炭纪末。然而，与离片椎类和壳椎类这一意义深远的分歧密切相关的事件——蛙形两栖类与无足目的分歧的时间却与分子钟所估计的相符。

A transmitting antenna with tapered fiber is proposed to transform the divergence partially coherent light formed by multi-mode fiber to collimate light. This structure can produce a partially coherent light of low divergence and guarantee the output power of laser transfers completely. It is applicable to laser communication in atmosphere.

提出采用直锥形光纤作为大气激光通信的发射天线，将多模光纤输出的部分相干发散光束变换为准平行光束的方案，既能得到发散角很小的部分相干激光光束，又能保证激光器输出能量的完全传输。

Both theory and practice analysis illustrate that stronger divergence field results from uneven distributed horizontal wind field on the right when high level current axis slopes. Owing to convectional wind convergence at low level responds to high level divergence and leads to storm.

理论和实际分析均表明：高空急流轴一旦发生倾斜，则由于其出口区水平风场的分布不均匀势必会在倾斜急流轴出口区的右侧产生较强的辐散场，由于对流风的作用，低层辐合必然会对高层辐散产生响应，诱发暴雨发生。

The homology of the nucleotide sequences and genetic variation analysis of NDV strains suggested that mere were obvious divergence in gene lever among NDV vaccine strains and epizootic strains isolated from different areas and different ages.The divergence may have effect on amino acid and structure and function of protein in some extent and lead to difference of immunogenicity ,which was one of reason being difficult in preventing from ND.

通过对NDV F基因核苷酸序列同源性比较及遗传变异分析发现：我国不同年代、不同地区分离的NDV毒株与疫苗毒株之间在基因水平上存在较大差异，这种差异对氨基酸及蛋白质的结构和功能可能会有一定影响，而NDVF蛋白的差异同时也造成免疫原性的差异，这很可能是新城疫的免疫防治十分困难的原因之一。

In the method, the equation of vorticity is simplified and combined with the definitions of vorticity and divergence , and then restrained by the equation of continuity to set the system of retrieval equations. Three-dimensional wind vector, vorticity and divergence can be got by solving the system of equations. Preliminary test has proved that it is feasible.

该方法从动力学角度出发，将柱坐标中的垂直涡度方程适当简化后，联系涡度散度的定义式，再以大气连续方程作约束，得到一个反演方程组，求解方程组就可得到不同高度层上的三维风场以及涡度、散度，初步检验证明其是可行的。

The Taylor formula holds the very important status in the differential calculus, especially in solves in some concrete problems to have the extremely important application, for instance the proof inequality, the judgment improper integral collects the divergence, asks the function the limit, asks the function the higher order derivative, determines certain complex progressions to collect the divergence, solves certain differential equation, as well as approximate calculation in and so on application, therefore this article will do the thorough research to these seven aspects.

摘 要：泰勒公式在微分学中占有非常重要地地位，尤其在处理1些具体的茄题中有10分重要的应用，比如证明不等式，判断广义积分的敛散性，求函数的极限，求函数的高阶导数，判定某些复杂级数的敛散性，求解某些微分方程，以及近似计算等中的应用，因此本文将对这七个方面做深入的研究。关键词：泰勒公式；不等式；广义积分；极限；高阶导数；复杂级数；微分方程

The kinetic energy mainly comes from system kinetic energy transmission and wind divergence, that is, the level of divergence of kinetic energy transmission and wind through the isobar kinetic energy created by cyclonic vortex can be made strengthened.

同时，中上层正涡度的水平平流随高度增加导致了垂直运动增强，由垂直平流造成的正涡度由低层向高层输送导致了中层短波槽加深，反过来又有利于低层辐合的增强，对MCV的形成和发展起到了间接的作用。

The set of divergence points is defined as following : we obtain that either all has the same limiting point or the topological entropy of the divergence points is as big as the whole space x .

我们得到如果不是所有的点x x ，{ l _ nx }有相同的极限点，则d的拓扑熵和整个空间的拓扑熵相同。

Panorama Many people are dancing in a large sitting room.

在一个大客厅里，许多人在跳舞。

We fully understand how a microwave oven cooks food, it is first necessary to talk ...

我们充分理解一个微波炉煮的食物，这是首先要谈。。。