It is found that the change of threshold voltage value fits in exponential law with absorbed dose, which is caused by the effect of space charge and interface charge.
产生这种现象的原因是场效应管氧化物中的空间俘获电荷与吸收剂量近似成线性变化，对阈值电压变化和吸收剂量有近似线性的改变；
OBJECTIVE: To assess the effect of blood lead level on t cell subgroup of children, and the association of t cell subgroup with threshold limit value of blood lead level.
目的：评估血铅对儿童T细胞亚群的影响，以及血铅临界值与T细胞亚群的关系。
According to the results of calculation, discuss the effect factor of Threshold value of of organic enrichment.
根据计算结果对碳酸盐岩气源岩有机质丰度下限的影响因素进行探讨。
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