velocity of convergence

The qualitative identification methods of Doppler radar velocity PPI pictures are introduced. The related image features of convective rainfall clouds are analyzed: ① the zero-velocity lines in the wind field related to large-scale convergence or divergence in combination with cold or warm advection;

介绍了多普勒雷达速度PPI产品图像定性识别方法，分析了与对流性降水云体有关的图像特征：①冷暖平流与大尺度辐合辐散运动相结合的零速度线；

The velocity distributing, variation of extension rate, shear rate and the natural convergence angle of the fluid were analyzed under different initial entry pressure.

分析了在不同口模压力（P）下入口区速度分布、延伸应变速率、剪切应变速率以及流体自然收敛角的变化。

Simulation results show that, the velocity of convergence of optimized estimate error is fast, estimated value is stabled around exact value with small jitter.

仿真结果表明，优化后的估计误差收敛速度快，估计值稳定在准确值附近，抖动很小。

Numerical results show that the convergence velocity of the complex-mode Galerkin method is higher than that of the real mode Galerkin method for a variable coefficient gyroscopic system.

数值结果表明，复模态Galerkin方法相比实模态Galerkin方法对变系数陀螺系统有较高的收敛速度。