The primitive atomization mechanism was discussed, and the system parameters, measurement principles and measurement process of 3D phase doppler particle anemometer (PDPA) were presented.

初步探讨了旋芯式喷嘴的雾化机理，简述了三维相位多普勒粒子测速仪（PDPA）的系统参数、测量原理和测量过程。

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For the left ventricular volume 3d modeling and volume estimation, this paper proposes a new method of left ventricular volume modeling based on the particle system of spherical growth.

针对左心室三维容积建模与估算问题，本文提出了一种基于球面增长的粒子系统左心室容积建模方法。

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For the left ventricular volume 3d modeling and volume estimation, this paper proposes a new method of left ventricular volume modeling based on the particle system of spherical growth.

针对左心室三维容积建模与估算问题，本文提出了一种基于球面增长的粒子系统左心室容积建模方法。

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