抽样间隔

A set of complex Morlet wavelet are applied on projection slice of each direction to decompose each projection into several frequency channels,the average and variance extracted are computed in each frequency channel,and then linear regression model is employed to computer realationship feature between frequency channels.1-D DFT is applied to features and the amplitudes of Fourier coefficient are selected as features,then the extracted features are rotation invariant.

该算法是将一定大小的图像进行二维傅里叶变换；其次在变换后的图像中央选择一个圆盘区域，并在方向［0°，180°］内进行等间隔角度频率抽样，实现方向分解，使用一组复Morlet小波对每个方向上的映射切片进行小波变换，从而实现多通道频率分解；在各个频率通道中计算均值和方差作为特征，并利用线性回归模型计算频率通道之间的关系特征；将特征沿方向进行一维傅里叶变换并取其幅值，从而得到旋转不变性特征。

Through adopting this algorithm the timing error is shortened to a half of the sample time interval.

通过采用这种算法可将定时误差缩小到只有抽样时间间隔的一半。

In the empirical test, data overlapping induced by the difference of the sample interval and forecast interval is considered.

在实证检验中，考虑了抽样间隔和预测间隔不一致而导致的数据重合问题。

First, the paper introduced the principle of the method,discussed the influence of sample interval of relaxation spectrum in the method and compared the method's result with the result from core mercury injection.

首先 ，介绍了基于梭状函数抽样的高分辨率弛豫谱反演方法的原理，并用该方法对岩心核磁数据进行了弛豫谱分解，讨论了弛豫谱抽样间隔对该方法的影响；其次，高分辨率弛豫反演结果和压汞结果的比较证明了弛豫谱反演方法的高分辨率优点。

The typic characteristic of this method is the dynamic adjustment of the sampling interval with the change of the network traffic.

作者在研究传统抽样方法和分层随机双抽样方法的基础上，提出自适应随机双抽样方法，该方法最显著的特征是能够随网络流量的变化动态调整抽样间隔。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。