A wave whose frequency is a whole - number multiple of that of another 调波一种频率是另一种波频率整数倍的谐波
Because the fundamental frequency of power system is not invariable , it needs to be tracked and measured 由于电网的基波频率并非始终不变的,因此需要对实际的电网频率进行跟踪检测。
To meet the waveform requirements , dds + multiplier + upconverter was used to realize the c - band fmcw frequency source 为满足波形参数要求,本文设计了dds +倍频+上变频的c波段三角形调频连续波频率源。
Eventually , they discovered that the alternator in the car was operating at a frequency which was a multiple of that of the radio wave being used for communication 最终,他们发现车上的交流电机运行的频率正好是和交流电波频率的整倍数
When the delta brainwave frequencies increase into the frequency of theta brainwaves , active dreaming takes place and often becomes more experiential to the person 当脑电波的频率升至波频率范围时,人们开始做梦,梦常常是根据个人经验产生的。