Moreover, such a long-term variation is related to the low-frequency variability of the Pacific sea-air systems, and the causes are sophisticated.
而且，这种长期变化与太平洋海气系统成员的低频变化有相关性， 其变化成因是复杂的。
Purpose: To establish a simple mathematical model for investigating the mechanism of frequency components in cardiovascular variability.
目的：建立心血管变异性的数学模型，探讨变异性频谱的主要频率成分机理。
Capacihve moisture sensor regards frequency signal as variability, it is made up of capacitive probe, high frequency surge circuit, dispart frequency instrument and metal shield box.
电容式水分传感器以频率信号作为参变量，由电容探头、高频振荡电路、分频器和金属屏蔽盒构成一体。
Capacihve meisture sensor regards frequency signal as variability, it is made up of capacitive probe, high frequency surge cirouit, dispart frequency instrument and metal shield box.
电容式水分传感器以频率信号作为参变量，由电容探头、高频振荡电路、分频器和金属屏蔽盒构成一体。
The interannual variability of dust weather frequency(DWF) in Beijing and its global atmospheric circulation are examined based on the correlation and composite analysis methods in this paper.
本文采用相关和合成的分析方法，研究北京沙尘频次的年际变化及其冬、春季的全球环流背景。
The interannual variability of dust weather frequency(DWF) in Beijing and its global atmospheric circulation are examined based on the correlation and composite analysis methods in this paper.
本文采用相关和合成的分析方法，研究北京沙尘频次的年际变化及其冬、春季的全球环流背景。
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