Supposing the LFM signals had been sorted and selecting the instantaneous frequency as identification character, the closest method is used to distinguish the signals.
在对LF M信号实现分选的基础上，选取待识信号的瞬时频率作为识别特征，利用最近邻方法对信号进行识别。
This paper describes the time-space dynamic character of circular polarised light by rotary vector and derives directly the instantaneous state rule of rotatory by the way of former.
本文用旋转矢量描述园偏振光的时空动态特征，并由此直接推导出旋光的瞬态规律。
In this paper, effects of material's mechanical character, microstructural anisotropy, on instantaneous temperature field is analyzed by means of the finite element method.
本文通过有限元方法计算，分析了材料力学性质细观各向异性对温度场的影响。
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