On the basis of studying many documents, introduced some non radioactive persistent red phosphors and systematically classified them according to their luminescent host.
在大量文献调研的基础上，根据发光基质的不同对目前非放射性长余辉红色磷光粉的研究现状进行了系统的分类介绍。
The model and mechanism of radioactive anomaly are the theoretical basis of radioactive prospecting in the oil and gas fields.
油气田放射性异常模式及其机理，是油气田放射性勘查的重要理论依据。
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 basis of obtained results the following conclusions were made: (1) In consequence of controlled releases of low level radioactive -waste water, a steady specific ecosystem had formed.
结果表明：（1）在低放废水排放影响下，一个相对稳定的特定生态系统已经生成；
On basis of obtained results the following conclusions were made: (1) In consequence of controlled releases of low level radioactive -waste water, a steady specific ecosystem had formed.
结果表明：（1）在低放废水排放影响下，一个相对稳定的特定生态系统已经生成；
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