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。
We have further investigated the probables strong relationship between the indoor radon concentrations and the radon exhalation rate from building surface.
对室内氡浓度与建筑物表面氡析出率的关系进行了分析研究。
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。
On the basis of distribution of radioactive elements and geological background, the theory equation of radon exhalation rate is derived from the decay rule of radioactive elements and gas diffusion.
根据放射性元素分布规律、地质背景及放射性元素衰变等，建立了计算氡析出率的理论公式。
On the basis of distribution of radioactive elements and geological background, the theory equation of radon exhalation rate is derived from the decay rule of radioactive elements and gas diffusion.
根据放射性元素分布规律、地质背景及放射性元素衰变等，建立了计算氡析出率的理论公式。
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