数值信号

The theoretical model of backscattering signal for wind lidar based on Fizeau interferometer is established. Wind velocity is retrieved by combining the least square method and the numerical iterative method.

建立了基于Fizeau干涉仪的测风激光雷达后向散射信号的理论模型，并利用最小二乘拟合方法结合数值迭代方法反演风速。

The underlying theory of SRC is well-studied interpolation filter which is used to calculate new samples at arbitrary time in between existing samples.

转换取样率的理论是大家熟知的内插器，该装置可以用来计算取样信号之间的数值。

Therefore, the choice of single mode in the examination and the frequency-thick band of mode has been given a particular illumination separately in the paper, following a relative numerical simulation. And a multi-cyclical sine signal modulated by Hanning window is used to simulate the excitation wave, and then an inspected ring of nodes is established to receive the echo, finally how the length of the circumferential cracks, the width of the axial cracks and the degree of the thickness-reduce effect the result is explained through the analysis of the result, further more, the reflection factor in the defect has been calculated.

因此，本文也就单一检测模态的选择以及模态频厚积段的选择分别予以了阐述，并有针对性的进行了数值计算：应用Hanning窗调制的多周期正弦波模拟单音频激励信号，并设置监测质点环接收回波，通过分析说明了管道的周向裂纹、轴向裂纹以及点蚀缺陷对缺陷回波所产生的影响，并进一步计算了缺陷处的反射系数。

Differential pressure control point of control: heating pipe network because of distance, signal transmission is not easy to achieve, or achieve a higher cost, the use of calculated values converted to the main circulating pump import and export; or in the pressure control point for backwater install pressure gauge, pressure gauge reference value to adjust the import and export of the main circulating pump pressure.

压差控制点处压差的控制：由于供热管网距离较远，信号传输不易实现或实现成本较高，采用计算值折算到主循环泵进出口；或在压差控制点供回水管安装压力表，参考压力表数值调整主循环泵进出口的压差。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。