Use and misuse of some Hurst parameter estimators applied to stationary and non-stationary financial time series

F Serinaldi - Physica A: Statistical Mechanics and its Applications, 2010 - Elsevier
The detection of long range dependence (LRD) is an important task in time series analysis.
LRD is often summarized by the well-known Hurst parameter (or exponent) H∈[0, 1], which …

Depths to the magnetic layer bottom in the South China Sea area and their tectonic implications

CF Li, X Shi, Z Zhou, J Li, J Geng… - Geophysical Journal …, 2010 - academic.oup.com
The depths to the magnetic layer bottom (Zb) in the South China Sea (SCS) area are
estimated by computing radially averaged amplitude spectra of total field magnetic …

中国东部及邻近海域磁异常数据所揭示的深部构造

李春峰, 陈冰, 周祖翼 - 中国科学: D 辑, 2009 - cqvip.com
通过对中国东部及邻近海域磁异常数据的化极和上延处理, 全面分析了不同构造块体和区域深大
断裂的磁异常特征和空间展布, 并在此基础上, 通过计算化极后的磁异常数据的径向平均振幅谱 …

Characterization of pore structure of tight sandstone reservoirs based on fractal analysis of NMR echo data

B Wu, R Xie, X Wang, T Wang, W Yue - Journal of Natural Gas Science and …, 2020 - Elsevier
The evaluation of the pore structure of tight oil and gas reservoirs has great significance for
the characterization of the reservoir properties and the prediction of reservoir productivity …

Prediction of fracture density using genetic algorithm support vector machine based on acoustic logging data

T Li, R Wang, Z Wang, M Zhao, L Li - Geophysics, 2018 - library.seg.org
Existing methods of well-logging interpretation cannot be applied accurately for the
exploration and evaluation of carbonate reservoirs because of the fracture development …

Deep crustal structures of eastern China and adjacent seas revealed by magnetic data

CF Li, B Chen, ZY Zhou - Science in China Series D: Earth Sciences, 2009 - Springer
Through reduction to the North Pole and upward continuation of the total field magnetic
anomalies, we analyze magnetic patterns and spatial distributions of different tectonic blocks …

Pore type identification in carbonate rocks using convolutional neural network based on acoustic logging data

T Li, Z Wang, R Wang, N Yu - Neural Computing and Applications, 2021 - Springer
Existing methods of well logging interpretation often contain uncertainties in the exploration
and evaluation of carbonate reservoirs due to the complex pore types. Based on the time …

基于小波多尺度分析的奇性指数: 一种新地震属性

李春峰 - 地球物理学报, 2005 - cqvip.com
传统的地震解释主要是观测地震振幅及相位的变化, 但是地震振幅也会掩盖地下介质中真实的
地质情况. 在许多情况下, 重要的地质信息可能是通过与振幅特征无关的奇异性参数来传递的 …

Elastic and shear moduli of coal measure rocks derived from basic well logs using fractal statistics and radial basis functions

CÖ Karacan - International Journal of Rock Mechanics and Mining …, 2009 - Elsevier
Gamma ray, density, sonic and core logs obtained from two boreholes drilled over a
longwall panel in Southwestern (SW) Pennsylvania were analyzed for formation boundaries …

Numerical study of pore structure effects on acoustic logging data in the borehole environment

T Li, Z Wang, N Yu, R Wang, Y Wang - Fractals, 2020 - World Scientific
Existing methods of well-logging interpretation often contain errors in the exploration and
evaluation of carbonate reservoirs due to the complex pore structures. The differences in …