The elements of vorticity , divergence , specific humidity , moisture flux divergence and k index etc . were benefited to the form and development of storm rainfall over the rainfall region 降水区上空的涡度、散度、比湿、水汽通量散度、 k指数等要素有利于暴雨的形成和发展。
The influence of turbulence is seen as a new term in the equations . this term is the divergence of a second - order correlation tensor of the fluctuating parts of each velocity component 湍流脉动的影响作为一个新的附加项?雷诺应力，出现在rans方程中，它是扰动速度分量二阶关联张量的散度。
At last this method is applied to 2 - d hyperbolic conservation laws , and can be extended to higher dimensions easily for the computation of numerical divergence dimension by dimension 最后这种方法被应用到求解二维双曲型守恒律，同时还可以很容易地通过在一维基础上计算数值散度的方式扩展到高维情形。
Existence and uniqueness are proved by lax - milgram theorem for a type of degenerate divergence elliptic equation in a type of sobolev spaces with weight , and also the regularity will be studied 先用lax - milgram定理证明一类退化散度型椭圆型方程在带权sobolev空间中弱解的存在唯一性，然后证明解的正则性。
Different parameterization schemes have different influences on the maximum intensity of rainfall and the distribution of rain area . suitable boundary layer parameterization scheme has obvious improvement on simulated results 不同的边界层参数化方案对雨量中心强度、雨区分布、散度和涡度的预报均有一定的影响。
We investigate a biological model described by the following cross - diffusion system which was first proposed by n . shigesada [ 5j : this paper is concerned with the local existence and global existence of the solutions for the system ( 1 ) 我们研究的散度型方程组为：我们研究了方程组( 1 )的初边值问题解的局部解存在性和整体解存在性。
The results show that the vorticity , divergence and vertical velocity are stronger in the flood season , but the cold wave and the low level jet are stronger in the non - flood season 结果表明：二者在环流形势、动力条件和低空急流方面存在著明显差异，汛期暴雨涡度、散度、垂直运动场较强，而非汛期暴雨冷空气强度相对较强，低空急流也较强。
Also the scale - separated technique is introduced to depict the clear mesoscale structure with the mcs , and the isentropic potential vorticity ( ipv ) and the moist potential vorticity ( mpv ) are used to diagnose the evolution mechanism of mcs 还借助位涡物理量及位涡观点、湿q矢量及湿q矢量散度对mcs进行诊断分析，并且利用mm5模拟了暴雨过程。
In this paper , we discusse the stability of perturtation of m - p inverses of closed operator function and then the stability of least square solution of elliptic partial differential equations of second order with unbounded coefficients 本文讨论了闭算子的m - p广义逆的扰动,并由此讨论首项系数本质无界的二阶散度型椭圆型微分方程的最小范数极小二乘解的稳定性
But in flood years , the convergences in mid - and low - level of troposphere are strong . divergence departure in 200hpa is positive , so the pumping cause the updraft stronger . as we all know , the updraft is better to the rain 涝年对流层中下层辐合偏强， zoohpa上，高原东北侧地区为正散度距平区，辐散较常年偏强，高空辐散抽吸作用使得该区盛行上升气流，有利于降水的形成。
