main valve

Time-frequency analysis of minimum variance with the steepest main lobe;

具有最陡主瓣的最小方差时频分析

Based on uniform line array,the sonar equation of active sonar beam main lobe and side lobe interfered by noise-jammer are presented.

研究了噪声干扰器对鱼雷主动声呐的对抗原理,以等间隔直线阵为例,分别给出了干扰器对鱼雷主动声呐主瓣和旁瓣的干扰方程。

The amplitude ratio of mainlobe to sidelobe of window function is its impor- tant index.

窗函数的主瓣与旁瓣的振幅比是窗函数的一个重要性能指标。

Methods The hearts of 171 adult corpses of Chinese Han nationality were observed for the forms of all the commissural region of the main valves and the commissural region of main and accessory valves.

方法对171例中国汉族成人心脏行右房室瓣主瓣连合区和主副瓣连合区的形态学观测。