波的瞬时特征 Transient Behavior of the waves
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分析了信号数字调制的基本原理，提出一种基于信号瞬时特征参数的数字通信信号解调方法。
The principle of digital modulated signal is analyzed in this paper. Based on instant character parameters, a kind of digital communication signal demodulation method is established.
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。
Supposing the LFM signals had been sorted and selecting the instantaneous frequency as identification character, the closest method is used to distinguish the signals.
测量分析小型手摇起动柴油机冷起动过程的瞬时转速、喷油及燃烧过程特征参数在每一循环中的变化情况；
The engine transient speed, fuel injection, combustion process and the cyclic variations in some performance indexes are investigated on a small single cylinder diesel engine during cold-starting.
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