搜索结果: 1-15 共查到“地球物理学 Radon”相关记录30条 . 查询时间(0.074 秒)
Gas radon emission related to geodynamic activity on Mt. Etna
radon geodynamical precursor Mt. Etna
2015/9/10
We report preliminary observations on possible correlations between anomalies of subsoil radon concentration
and geodynamical events on Mt. Etna. In recent years several studies have been carried out...
Indoor and soil radon measurements in the Hyblean Foreland (South-East Sicily)
radon uranium indoor air soil gas Hyblean Foreland
2015/9/2
Indoor radon behavior in two sites of SE Sicily was studied as a function of the soil radon concentration. The
chosen locations were Ragusa and Modica towns, placed in the Hyblean Plateau (northern m...
The nexus of soil radon and hydrogen dynamics and seismicity of the northern flank of the Kuril-Kamchatka subduction zone
radon hydrogen seismicity geodeformation wave earthquake
2015/9/2
The comparison of kinematics and dynamic parameters of radon and molecular hydrogen concentration in subsoil
air on the stations network at the Petropavlovsk-Kamchatsky geodynamic proving ground with...
Experimental studies of anomalous radon activity in the Tlamacas Mountain, Popocatepetl Volcano area, México: new tools to study lithosphere-atmosphere coupling for forecasting volcanic and seismic events
atmosphere electricity Litosphere-Atmosphere coupling
2015/8/24
This study presents and discusses the results of soil radon monitoring at three different volcano sites and one reference site, from December 2007 to January 2009. This relates to the activity of the ...
A simple statistical procedure for the analysis of radon anomalies associated with seismic activity
Radon emissions Seismic precursors Seismic activity
2015/8/18
This study presents an analysis of data from various radon anomalies that were compiled by Toutain and Baubron [1999], to investigate their relationships with the earthquake parameters of magnitude an...
各向异性高分辨率Radon变换压制多次波
各向异性 Radon变换 高分辨率 多次波压制
2016/8/30
针对VTI介质和海洋大炮检距地震数据反射波同相轴不能严格满足双曲时距关系，一次波和多次波能量在Radon域中聚焦性较差，多次波的压制效果不理想的问题，通过在双曲Radon变换积分路径中引入各向异性参数η，描述VTI介质和海洋大炮检距地震数据的时距曲线关系，在Radon域中有效聚焦一次波和多次波能量。同时，引入基于共轭导向梯度(CGG)算法的各向异性高分辨率Radon变换，基于L1范数对模型空间进行...
Radon signals at the Roded site, Southern Israel
Radon signals Roded site Southern Israel
2014/12/31
Temporal variations of radon in the geological environment (upper crust) are frequent and recognized as unique in terms of the signals encountered and for the lack of substantial and generally applica...
Analysis of soil radon data in earthquake precursory studies
LR-115 Radon monitoring Correlation Seismic activity
2015/8/18
Soil radon data were recorded at two selected sites along Mat fault in Mizoram (India), which lies in the highest seismic zone in India. The study was carried out during July 2011 to May 2013 using LR...
各向异性Radon变换及其在多次波压制中的应用
各向异性 Radon变换 长偏移距 多次波压制
2014/10/8
即使采用分辨率很高的双曲Radon变换，对速度各向异性发育介质及长偏移距情况下的地震数据，其Radon域内能量仍不收敛.为了克服此难题，我们在Radon变换的积分路径中考虑了非双曲走时的影响，通过引入非双曲时差公式中的各向异性非椭圆率η参数，可以准确描述出长偏移距条件下来自同一层位的时距曲线，并推导了由偏移距、慢度、非椭圆率三参数控制的积分曲线正反变换公式，我们称之为各向异性Radon变换.离散化...
3D高阶抛物Radon变换地震数据保幅重建
3D高阶Radon变换 AVO数据 保幅重建
2014/10/8
本文结合传统3D抛物Radon变换（PRT）和AVO数据正交多项式拟合，给出了3D高阶抛物Radon变换方法（HOPRT）.该变换增加了描述AVO数据变化的梯度信息和曲率信息，拓展了传统3D抛物Radon变换方法，使其在具有AVO特征的数据重建中具有更高的准确度，从而提高AVO分析的可靠性.文中给出了3D高阶抛物Radon变换进行地震数据保幅重建的流程.理论模型和实际地震资料的重建结果显示了本文方...
反射波场分离是井孔地震资料处理中极其重要的一个环节，波场分离的质量直接影响成像结果的精度.不管是VSP还是井间地震资料，其反射波时距曲线都近似直线型，根据这一特征，本文提出一种改进的线性Radon变换方法来进行井孔资料的反射波上下行波场分离.该方法基于频率域线性Radon变换，通过引入一个新的变量λ来消除变换算子对频率的依赖性，避免了求取每一频率分量对应的不同变换算子，显著降低了计算成本;文中在求...
高阶高分辨率Radon变换地震数据重建方法
高阶高分辨Radon变换 正交多项式变换 AVO 数据重建
2014/3/11
地震数据缺失会影响处理和解释结果。本文基于Radon变换地震数据重建并结合地震波同相轴横向连续性，提出高阶高分辨率Radon变换地震数据重建方法。该方法将正交多项式变换和Radon变换结合，通过正交多项式变换拟合地震波振幅随炮检距变化特性，改进了传统Radon变换只考虑地震道叠加特性的缺陷，增加了振幅变化的斜率和曲率信息，保留了地震波AVO特性，有利于地震波振幅信息在横向变化情况下缺失地震数据的重...
Radon变换法是进行一次波与多次波分离的常用手段，最小平方约束下的频率域抛物Radon变换将t-x域数据转换到Radon域后，因存在剪刀状发散的截断效应，用传统方法难以彻底分离一次波和多次波。针对这一缺陷，提出了迭代抛物Radon变换法，即在Radon域截取一次波聚焦点附近很小区域内的数据为初始数据，经过Radon反变换和正变换后得到新的Radon域数据，然后用初始数据覆盖对应的小区域，经过迭代...
基于波动方程预测的表面多次波压制方法可处理复杂地下介质的地震资料,但计算成本较高.基于滤波的多次波压制方法计算效率较高,但其成功应用仅局限于一次波和多次波有明显时差差别的地震数据,对来自速度逆转等复杂介质数据则较难获得满意的压制效果.本文将波动方程预测的反馈迭代法和滤波法有效结合,采用GPU(图形处理器)和CPU协同并行加速计算粗略预测表面多次波,随后在双曲Radon域比较分析原始数据和预测的多次...
The origin and detection of spike-like anomalies in soil gas radon time series
radon detection spike-like anomaly
2017/4/12
Desorption of radon is of short duration but longer than telluric noises and is usually accomplished in less than one
minute based on our binary event counting with a 16 second interval. Adapting an ...