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混合域高分辨率抛物Radon变换及在衰减多次波中的应用
高分辨率Radon变换 稀疏反演 循环矩阵 衰减多次波
2013/11/7
高分辨率Radon变换存在计算效率和分辨率不能兼得的困境.时间域算法可以获得很高的分辨率，但计算效率非常低；频率域算法具有良好计算效率，但分辨率不理想.为此发展了混合域高分辨率抛物Radon变换，即对频率域抛物Radon变换引入时变的稀疏权.本文给出了一种新的混合域高分辨率抛物Radon变换实现方法，并将该算法应用于叠前数据衰减多次波.文中给出了Radon变换和衰减多次波的流程.理论和实际数据算例...
Sensitivity of Global Modeling Initiative chemistry and transport model simulations of radon-222 and lead-210 to input meteorological data
Global Modeling Initiative chemistry transport model simulations radon-222
2009/2/19
We have used the Global Modeling Initiative chemistry and transport model to simulate the radionuclides radon-222 and lead-210 using three different sets of input meteorological information: 1. Output...
On using radon-222 and CO2 to calculate regional-scale CO2 fluxes
radon-222 CO2 regional-scale CO2
2008/12/15
Because of its ubiquitous release on land and well-characterized atmospheric loss, radon-222 has been very useful for deducing fluxes of greenhouse gases such as CO2, CH4, and N2O. It is shown here th...
Evaluation of the atmospheric transport in a GCM using radon measurements: sensitivity to cumulus convection parameterization
atmospheric transport GCM cumulus convection parameterization
2008/11/7
The radioactive species radon (222Rn) has long been used as a test tracer for the numerical simulation of large scale transport processes. In this study, radon transport experiments are carried out us...
On the generation of electric field and infrared radiation in aerosol clouds due to radon emanation in the atmosphere before earthquakes
electric field infrared radiation aerosol clouds radon emanation the atmosphere before earthquakes
2009/12/31
The non-stationary Frenkel model of the generator of spikes of the local electric field with time scales of 1–100 min in the atmosphere near seismic fracture regions some days before strong earthqukes...
On the generation of electric field and infrared radiation in aerosol clouds due to radon emanation in the atmosphere before earthquakes
electric field infrared radiation aerosol clouds radon emanation earthquakes
2010/1/4
The non-stationary Frenkel model of the generator of spikes of the local electric field with time scales of 1–100 min in the atmosphere near seismic fracture regions some days before strong earthqukes...
加权抛物Radon变换叠前地震数据重建
加权抛物Radon变换（WPRT） 地震数据重建 数据规则化
2008/6/17
基于部分动校正（NMO）后反射同相轴在CMP道集上的抛物线走时近似，给出了加权抛物Radon变换叠前地震数据重建方法（WPRT）. WPRT通过在迭代过程中引入变化着的权系数，拓展和改进了传统抛物Radon变换方法，使其可同时完成不规则采样的规则化和空道及近偏移距道重建，且有更高的计算效率. 文中给出了应用WPRT进行近偏移距和中偏移距的空地震道重建及数据规则化的算法实现. 理论模型和实际地震资料...
Radon-222 budget in Catalina Harbor, California: 1. Water mixing rates
Radon-222 budget Catalina Harbor California 1. Water mixing rates
2014/4/21
We describe mixing on the basis of the radon distribution in Catalina Harbor, a small embayment on the southwest side of Catalina Island, California. During June 1998, there was a 2–3-m-thick warm sur...
Radon-222 budget in Catalina Harbor, California: 2. Flow dynamics and residence time in a tidal beach
Radon-222 budget Catalina Harbor California:2. Flow dynamics residence time a tidal beach
2014/4/21
We measured the flux of water through a beach at the head of Catalina Harbor,California, by monitoring the water table in a transect of wells perpendicular to the shoreline. During a24-h period, the v...
具有一维小波变换的逆Radon变换
小波反演公式 卷积回投射方法
2007/12/11
该文得到具有一维小波Radon变换的小波逆公式,从该逆公式导出Radon变换的卷积回投射法建立了Radon变换小波逆公式与二维Radon变换卷积-回投射方法之间的渐近关系.
讨论了集值测度存在弱Ｒａｄｏｎ－Ｎｉｋｏｄｙｍ导数的充要条件；对弱紧凸集值随机变量 给出了其条件期望存在时的一个特征．
INVERSE RADON TRANSFORM WITH ONE-DIMENSIONAL WAVELET TRANSFORM
Radon transform wavelet tran
2007/12/10
In this paper, the wavelet inverse formula of Radon transform is obtained with onedimensional wavelet. The convolution back-projection method of Radon transform is derived from this inverse formula. ...
Anomalous radon emanation linked to preseismic electromagnetic phenomena
Anomalous radon emanation preseismic electromagnetic phenomena
2009/12/30
Anomalous emanation of radon (222Rn) was observed preceding large earthquakes and is considered to be linked to preseismic electromagnetic phenomena (e.g. great changes of atmospheric electric field a...
联系复平面上由弧长所引出的 Radon 测度的加权不等式
2007/8/27
本文考虑联系 R~n 中 Radon 测度的极大算子的加权不等式,然后应用所得的结果得到沿复平面上正则曲线的极大算子及奇异积分的加权模不等式.
Fractional Radon Transform and Transform of Wigner Operator
fractional Radon transformation Wigner operator IWOP techneque
2007/8/15
2003Vol.39No.2pp.147-150DOI:
Fractional Radon Transform and Transform of Wigner Operator
FAN Hong-Yi1,2 and CHEN Jun-Hua2
1 CCAST (World Laboratory), P.O. Box 8730, Beij...