It is shown that the radium content is not completely relevant to radon exhalation rate from some building material.
结果表明，建筑材料中镭含量与氡析出率之间并不完全相关。
The only input factors of the simplified model were soil radium content, dry bulk density, water content and soil texture type and the output was soil radon exhalation rate.
模型只需输入土壤样品镭含量、容重、质量含水率和质地名称，就可以输出该样品的氡析出率理论值。
Methods Based on soil radon diffusive theory, a model including the influences of soil radium content, emanation coefficient, soil porosity and moisture saturation on radon exhalation was established.
方法通过对氡在土壤中扩散理论的分析，建立土壤氡析出率数学模型，该模型考虑了土壤的镭含量、射气系数、孔隙度和含水饱和度等因素对氡析出率的影响。
The content of radioactive radium in mineral was 19 times higer than that in rock and served as a chief source of radon.
矿石样品放射性镭含量比岩石样品高19倍，为井下氡气的主要来源；
The content of radioactive radium in mineral was 19 times higer than that in rock and served as a chief source of radon.
矿石样品放射性镭含量比岩石样品高19倍，为井下氡气的主要来源；
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