【摘 要】
：
地震信号的衰减一般是在频域内利用信号功率谱的统计性质进行表征.但是,传统的基于傅立叶变换的功率谱估计方法的分辨率较低,使得衰减估计的精度较低.Wigner-Ville分布是一种
【基金项目】
：
China Postdoctoral Science Foundation and the Innovation Fund for the Young Scientists, Research Institute of Petroleum Exploration and Development,PetroChina Company Limited;
论文部分内容阅读
地震信号的衰减一般是在频域内利用信号功率谱的统计性质进行表征.但是,传统的基于傅立叶变换的功率谱估计方法的分辨率较低,使得衰减估计的精度较低.Wigner-Ville分布是一种重要的Cohen类时频分布,它具有一系列的优良性质,如时频边缘分布性质、好的时频聚集性等.这些性质对信号的时频分析具有重要意义.因此,Wigner-Ville分布为地震信号的衰减估计提供了新的手段.本文首先介绍了Wigner-Ville分布以及能够减少或消除交叉项影响的平滑Wigner-Ville分布,然后,提出了一种基于Wigner-Ville分布的衰减估计方法.在这一方法中,利用Wigner-Ville分布得到的瞬时能量谱中高频段的能量下降速率度量衰减.将这一方法应用到塔中地区奥陶系礁滩相碳酸盐岩储层预测,结果表明,基于Wigner-Ville分布的衰减能够有效地检测出礁滩相带和泻湖区域之间衰减特性的差异.
其他文献
Multi-walled carbon nanotubes (CNTs) were grown on silicon nanoporous pillar array (Si-NPA) by thermal chemical vapor deposition method, and the structural and
The pullout testing of geosynthetics is essential for studying interface interaction in the soil-reinforcement system. In this paper, a new method for testing i
利用能量为50MeV的12C束流,通过反应130Te(12C,3n)布居了139Ce的高自旋态．基于标准在束核谱学实验测量结果,扩展并更新了139Ce的能级纲图．139Ce的能级结构具有球形原子核的典型
In this paper, high density polyethylene (HDPE)/poly(ethylene-co-butene) (PEB) blend (50/50 wt%) was prepared through solution blending and then compression mol
Poly(propylene fumarate-co-propylene sebacate) (P(PF-co-PS)) was crosslinked with N-vinyl pyrrolidone (N-VP) to form networks. It was investigated as biodegrada
The reconstruction of cylindrically layered media is investigated in this article. The inverse problem is modeled using a source-type integral equation with a s
A state-of-art review is given to the new advances on fatigue reliability design and analysis methods of Chinese railway vehicle's structures. First, the struct
A definition of a self-dual code on graph and a procedure based on factor graphs to judge a self-dual code were presented.Three contributions of this paper were
The most important problem in targets tracking is data association which may be represented as a sort of constraint combinational optimization problem. Chaos op
Newly developed sintering aid Na5.6Cu1.2Sb10O29 (NCS) and lead-bismuth-free piezoceramics (Na0.5K0.44Li0.06) Nb0.95Sb0.05O3 (NKLNS) were prepared by the convent