velocity focusing

Influence of parameters such as attenuation coefficient, velocity of sound, and temperature of medium on focusing sound field generated by a self-focused concave spherical radiator has been studied through numerical simulation with Ray-leigh integral.

以凹球面自聚焦超声换能器为例，用瑞利积分进行数值模拟计算，研究声衰减、声速、温度等参数对声聚焦的影响，并对不同生物组织中声聚焦的特点进行了比较。

According to these improvements, the differential optical flow algorithm based on multi-scale-space focusing can not only adapt itself to larger motion velocity and larger velocity change, but also alleviate the error propagation effect through adopting bilinear interpolation operator. 3.

采用了基于多尺度空间的微分光流算法，不仅对运动速度和速度变化较大的情况具有很好的适应性，而且采用了双线性插值算子以缓解误差传播效应。