nature of the target meaning in English

空中目标性质

The second part brings forward a new ar - model - based arm detection method based on features of arm and characteristics of velocity and acceleration of the radar echoes . by establishing two - order ar models , this new detection method computes the poles of models representing different targets , thus estimates the acceleration of the targets so as to determine the nature of the targets . furthermore , this method can not only be applied when the arm is being tracked by radar , but also be put into use in radar ’ s seeking and scanning times
第二部分则是根据反辐射导弹( arm )的特点及其雷达回波信号中速度、加速度等特征,提出了一种新的基于ar模型的arm检测算法,该方法通过建立二阶ar模型、估计代表不同目标的模型极点,并由此估算目标加速度来判断目标性质,该方法不仅可以在雷达已跟踪上arm后采用,而且适用于雷达搜索扫描时使用,仿真结果表明该方法具有分辨率高,对雷达脉冲重复频率( pulserepetitionfrequency , prf )及积累脉冲数要求不高的特点,在低的prf及少的积累脉冲下,利用该方法仍可有效地识别检测arm 。