次波

In this paper, operational principle and design scheme of an H(21)° mode filter are dealt with, approximate formula for determining mode coupling quantities according to Bethe's small Holes diffraction theorems is derived, and...

实验证实了理论分析和设计的正确性。波型滤波器的主波和高次波型传输特性得到了比较满意的结果。

The research progress in SRM attenuation is presented in this paper, and also the SRM future research direction.

本文给出了表面多次波衰减方法的研究现状的系统阐述，并分析了表面多次波衰减研究的发展趋势。

In the CFP-based redatuming for layers with big dip angle, updating the synthetic operator with both primary and multiple reflection can expand the lateral capture and improve the accuracy.

7对于近地表大地层倾角的CFP虚拟观测面的建立，综合使用全程二次波和一次波进行合成算子的更新，可以达到扩展算子横向范围，提高精度的目的。

The energy of the excited wave is almost proportional to the energy of the primary wave, and increases slowly with initial energy of the secondary wave growing up, too.

生成波的能量几乎正比于主波的能量，也随次波的能量增大而增大。

For the actual oil field data,the impact of multiples generated by coal beds on the primary wave AVO of top interface of underlying low speed gas sand has been studied.

基于实际油田条件研究了煤层产生的多次波对下伏低速气层顶界面的一次波AVO的影响。

Typical methods of the first class consist of predictive deconvolution, normal moveout interconversion stacking, f-k transformation, tau-p transformation, parabola Radon transformation and beamforming. They can be called as seismography method based on the geometry. The second class methods, mainly bases on elasticity undulatory theory, through simulation or reversal development method forecast multiple, and then match it with the original data.

比较典型的方法有预测反褶积、正常时差变换叠加、f-k变换、τ-p变换、抛物线 Radon 变换和聚束滤波等，它们可以简称为基于几何地震学方法或"几何滤波类方法"；第二类主要是基于弹性波动理论的方法，通过模拟或反演方法来预测原始数据中多次波，继而从原始数据中匹配减去所预测的多次波。

In this paper, inverse scattering series method is based on wave equation and Born series, multiples are predicted and removed by constructing a subseries corresponding to surface-related multiples. This method does not need any subsurface information and is suitable for different kinds of complex structures.

本文研究的逆散射级数法以波动方程和Born级数为基础，构造一个与自由表面多次波相关的子序列来预测并消除多次波，该方法不需要知道地下的速度结构信息，适用于各种复杂的地下情况。

Then it studied a method called intertrace sequence regulation suppressing multiple in detail, which advanced by Bruland. Through thoroughly analyzing its algorithm, researching actual processing effect, after making great improvement, this paper raised a new suppressing method called Seismic Trace Sequence Regulation.

然后详细研究了由 Bruland 等人提出的以样点空间调序方式压制多次波的方法，通过深入剖析其算法，研究实际处理效果，对原方法作了较大改进，提出了道序调整多次波压制法。

Based on the conclusion, we adopt a new method to eliminate multiples, which is to use the statistic character of error, obtain inverse wavelet's estimation, correct misshaped inverse wavelets for non-orthogonality in inverse wavelet domain by the estimation. The method mainly has four steps.

在此基础上，本文提出了在逆子波域（单道自适应相减滤波的滤波算子的集合），利用其误差的概率分布特征，对逆子波进行估计，用逆子波的估计对逆子波进行校正来消除多次波的方法。

Through poising seismic records in the direction of space, this method avoids the assumption that multiple events are orthogonal to the primary events.

该方法通过在空间方向上对地震记录进行均衡，避免了多次波和一次波同相轴正交的假设条件。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。