1) frequency coupling
频率耦合
1.
Using FFT (fast Fourier transfer) to study the frequency coupling effect, we get the results about coupling effects of the frequency of vorticity naturally shedding and the frequency of circular cylinder rotationally oscillating at low Reynold number.
进而说明了在不同频率耦合区域流场涡形成、发展和脱落的规
2) coupling frequency
耦合频率
3) frequency coupling feature
频率耦合特征
1.
Quadratic frequency coupling feature radiated by actual nonlinear vibration system can be extracted using third order cumulants.
非线性振动系统产生的二次频率耦合特征能用三阶累积量提取,三次频率耦合特征、双对频率耦合特征能用四阶累积量提取,高于三次的频率耦合特征的提取,未见报道。
4) higher order frequency coupling
高次频率耦合
1.
To extract higher order frequency coupling features, the conception of 31/2-dimensional spectrum is firstly defined and its own properties are analyzed.
为了提取高次频率耦合特征,定义了32维谱的概念,从理论上研究了32维谱的特有性质。
5) quadratic-to-cubic frequency coupling
二三对频率耦合
1.
31/2-dimensional spectrum of complex signals can extract the attended quartic frequency coupling components,the attended quadratic-to-cubic frequency coupling components,procreant frequency components for these coupling as well as their relative coupl.
理论研究表明:利用32维谱能完全抑制对称分布的噪声;利用复数信号的32维谱能分别提取参与4次频率耦合的分量和因4次频率耦合产生的新频率分量,也能分别提取参与二三对频率耦合的分量和因二三对频率耦合产生的新频率分量;利用实数信号的32维谱,可同时提取参与4次频率耦合、二三对频率耦合的分量和因频率耦合产生的新频率分量;无论是利用复数信号还是实数信号的32维谱,均无法提取频率独立的分量。
6) quartic frequency coupling
4次频率耦合
1.
31/2-dimensional spectrum of complex signals can extract the attended quartic frequency coupling components,the attended quadratic-to-cubic frequency coupling components,procreant frequency components for these coupling as well as their relative coupl.
理论研究表明:利用32维谱能完全抑制对称分布的噪声;利用复数信号的32维谱能分别提取参与4次频率耦合的分量和因4次频率耦合产生的新频率分量,也能分别提取参与二三对频率耦合的分量和因二三对频率耦合产生的新频率分量;利用实数信号的32维谱,可同时提取参与4次频率耦合、二三对频率耦合的分量和因频率耦合产生的新频率分量;无论是利用复数信号还是实数信号的32维谱,均无法提取频率独立的分量。
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条