搜索结果: 1-9 共查到“物理学 radon”相关记录9条 . 查询时间(0.419 秒)
Radon data processing and outputs for the needs of the State Office for Nuclear Safety (according to the Czech Radon Programme)
radon-indoor-bedrock relationship radon mapping
2015/9/10
Much of the population living in the Czech Republic is exposed to radiation from natural sources, especially to the
radon effect. The aim of geological research defined by the State Office for Nuclea...
Radon and thoron daughter activities in the environment of the King George Island (West Antarctica)
Antarctica radon uranium thorium spectrometry
2015/9/10
Results of 253 gamma spectrometric analyses of radon daughters in soil and bedrocks of the King George Island
(West Antarctica) are presented. Measured values range from 0.1 to 58.4 Bq/kg, and from 4...
基于Radon方向场检测指纹奇异点
指纹提取 奇异点检测 方向场 方向熵
2014/3/21
为了快速、准确地检测与定位指纹奇异点(核心点、三角点)以实现指纹分类与匹配,本文引入了Radon算子来提取指纹的纹理方向特征以实现指纹方向场的分割。提出了方向熵的概念来描述方向场的分布特征,给出了基于方向熵的奇异点区域搜索方法。定义了方向密度函数以衡量奇异点搜索的优劣,指导奇异点侦测的方向熵阈值调整。最终实现了对奇异点的准确定位,准确率达到83%。跟同类算法分析比较,提出的方法在准确性与检测效率方...
Radon-based ULM 图像方向检测算法研究
Radon 变换 点扩展函数 最大类间差法 快速傅里叶变换
2012/9/24
通过分析以往算法的优劣,提出了基于 Radon 变换的匀速直线运动图像方向检测算法.首先指出匀速直线运动假设的合理性,推理该运动模式下图像的频谱特征;其次对经过预处理的图像应用Radon 变换,并计算出运动方向.实验结果表明:为更准确地确定运动方向而过分地缩短步长,将使运算代价变大,而效果较小.
Study on radon and radium concentrations in drinking water in west region of Iran
Radon concentration Drinking water cancer risk lung dose Stomach dose
2011/9/2
One of the most important characterizations of social health is existence the availability of safe drinking water. Since one of the sources of water contamination is nuclear contamination from radon g...
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...
From Complex Fractional Fourier Transform to Complex Fractional Radon
Transform
complex fractional Fourier transform Radon transform
2007/8/15
2004Vol.42No.1pp.23-26DOI:
From Complex Fractional Fourier Transform to Complex Fractional Radon
Transform
FAN Hong-Yi and JIANG Nian-Quan
Department of Material Scienc...
The dangers to the human health upon exposure to radon and its daughter products is the main motivation behind the vast number of studies performed to find the concentration of radon in our living env...
Analysis of Atmospheric Concentrations of Radon and Thoron Using Beta Counting Technique
radon thoron radon progeny secular equilibrium radon concentration seasonal variation
2010/4/19
This paper presents a detailed theory and experimental procedure for measurement and analysis of mixed radon and thoron in the environment. The technique has been successfully applied to the study of ...