双周期性 meaning in English

double periodicity

The exo - atmospheric combat enviroment is introduced , including the outer - space ’ s optical signature , the optical and dynamic signature of the potential targets . the research focus is the precessing rv and tumbling decoy ’ s irradiance intensity ’ s periodical changing rule . a double periodical function model is presented to simulate their irradiance functions
根据空间弹道目标的光学与运动学特性,重点研究了进动旋转的弹头和翻滚运动的诱饵的光学强度序列信号的周期性变化规律,并采用双周期性函数来表示该光学强度信号,以反映弹头和诱饵在运动特性和表面辐射特征方面的差异。