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Numerical Simulation of the binchuan Airgun Source Affected by Water Body

Earthquake Research in China 2019年第2期33卷 208-219页

作者： SUN Nan SUN Yaochong School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Yunnan Earthquake Agency Kunming 650224China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055GuangdongChina

The numerical simulation of the influence of a reservoir water body on the binchuan airgun source could provide a theoretical basis to analyze the data obtained from the active source detection and inversion of regional interior medium *** on a medium model containing limited water body,we use the finite different method to simulate the effect of the water level,excitation energy and focal *** results show that the influence on the waveform amplitude caused by the water level changing is very large near the water body,and that a high water level or large amplitude change can have a larger ***,for stations beyond a certain epicentral distance,the influence will be weakened and kept *** for the binchuan airgun source,amplitude fluctuation caused by the water level changing becomes very small(±0.05 times)after propagating a certain distance,so we can remove the influence of the water level changing by referring to the numerical simulation *** amplitude increases linearly with the excitation energy and focal depth,therefore,the greater the energy and the deeper the focal depth,the better the effect of the excitation,and is more conducive in detecting remote and deep penetration underground structures.

关键词： Numerical modeling binchuan airgun source Reservoir water level Excitation energy Focal depth

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Characteristics of Seismic Wave Propagation in the binchuan Region of Yunnan Using a Dense Seismic Array and Large Volume Airgun Shots

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Earthquake Research in China 2019年第2期33卷 174-185页

作者： SHE Yuyang YAO Huajian WANG Weitao LIU Bin Laboratory of Seismology and Physics of Earth's Interior&School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Mengcheng National Geophysical Observatory University of Science and Technology of ChinaMengcheng 233500AnhuiChina Key Laboratory of Seismic Observation and Geophysical Imaging Institute of GeophysicsChina Earthquake AdministrationBeijing 100081China

The binchuan region of Yunnan is a structurally complex region with mountains,basins,and active *** this situation,seismic wave propagation exhibits complex characteristics due to strong heterogeneity of underground media instead of following the great-circle *** order to obtain a high-resolution shallow crustal structure,a dense seismic array was deployed during March 21 to May 30,2017 in this *** better understand the complexities of seismic wave propagation in this region,we perform array-based frequency-domain beamforming analysis and single-station based polarization analysis to investigate the characteristics of seismic wave propagation,using airgun-generated P-wave signals recorded by dense array stations in this *** results from these two methods both reveal similar but complex characteristics of seismic wave propagation in the binchuan *** azimuth anomalies off the great-circle path are quite large with values up to 30°,which is caused by strong structural heterogeneity in the very shallow *** research provide a better understanding of the complex geologic structures in this area and provide guidance for detecting concealed faults and distribution of velocity anomalies.

关键词： Airgun signal Body waves Wave propagation binchuan basin Beamforming Polarization analysis

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StudyontheStrategiesoftheE-commerceImplementationin binchuan Grape Industry of China——Based onSWOT Quantitative Analysis Method

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Proceedings of Business and Economic Studies 2018年第1期1卷 10-13页

作者： Xiaodong Liu John Walsh School of Management Shinawatra International UniversityBBD BuildingViphawadi-Rangsit RoadPhaya ThaiBangkok 10400Thailand

This study takes binchuan County grape industry as the research point,on the basis of SWOT analysis in e-commerce grape industry resources in binchuan County,combined with AHP quantitative analysis method,used Delphi method gives the factors weights and scores from the *** used the fourdimensional strategic center coordinates location of gravity,determine the strategy orientation *** to conclusion that the strategies of implementation e-commerce of grape industry in binchuan County should be opportunity type,and then put forward strategic suggestions.

关键词： Strategies E-commerce binchuan County SWOT quantitative analysis

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Improving Airgun Signal Detection with Small-Aperture Seismic Array in Yunnan

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Earthquake Research in China 2019年第2期33卷 248-264页

作者： WANG Weijun ZHOU Qingyun KOU Huadong LIU Guiping ZHU Hongbo YAN Kun Key Laboratory of Earthquake Prediction Institute of Earthquake ForecastingCEABeijing 100036China Yunnan Earthquake Agency Kunming 650224China

Repeating airgun sources are eco-friendly sources for monitoring the changes in the physical properties of subsurface mediums,but their signals decay quickly and are buried in the noises soon after traveling short *** waveforms from different airgun shots recorded by a single seismic station(shot stacking)is the most popular technique to detect weak signals from noisy backgrounds,and has been widely used to process the data of Fixed Airgun Signal Transmission Stations(FASTS)in ***,shot stacking sacrifices the time resolution in monitoring to recover a qualified airgun signal by stacking many shots at distance stations,and also suffers from persistent local *** this paper,we carried out several small-aperture seismic array experiments around the binchuan FAST Station(BCFASTS)in Yunnan Province,China,and applied the array technique to improve airgun signal *** results show that seismic array processing combining with shot stacking can suppress seismic noises more efficiently,and provide better signal-to-noise ratio(SNR)and coherent airgun signals with less airgun *** work suggests that the array technique is a feasible and promising tool in FAST to increase the time resolution and reduce noise interference on routine monitoring.

关键词： Airgun Signal Detection Small-Aperture Seismic Array binchuan Fixed Airgun Signal Transmission Stations(BCFASTS)

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