The decaying DC component in the sampling signal will bring errors to the full-wave Fourier algorithm, which is derived with periodic signal.
全波傅氏算法是基于周期信号推导出来的，当采样信号中含有衰减直流分量时，将会产生误差。
2
Firstly: the analysis and investigation on the composition of FCC flue gas provide sampling equipment based on knowing its component, content and the range of state parameters.
首先：通过对催化烟气组分进行了调查分析，了解其组分、含量与状态参数范围，为选择采样设备提供依据。
3
The sampling part, which is fixed in a revolving component, processes and digitalizes signals from sensors and sends out the data by wireless transmission technology.