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- Keywords radionuclide;effective annual dose rate;external hazard index;the radium equivalent activity; 天然放射性核素;年有效剂量;外照射指数;等效镭浓度;
- effective annual dose rate 年有效剂量
- Objective To study a simple method for estimating cosmic radiation effective dose rate for aircrew. 目的探讨一种可用于民航飞行人员宇宙辐射有效剂量率估算的简便算法。
- The first step is to determine the unit-time reference dose rate. 第一步要确定单位时间参考剂量率。
- The simple method is applicable in estimating cosmic radiation effective dose rate for flight altitude of 7 000 m to 20 000 m. 简便估算法可用于海拔为 70 0 0 2 0 0 0 0m的飞行空间的宇宙辐射有效剂量率估算。
- For other major organs, the annual dose limits for preventing deterministic effects are as follows. 至于其他主要人体组织确定性效应的剂量阈值如下
- Multiple low dose RIT is better than the single large dose RIT,it shows reverse dose rate effect. 分次小剂量RIT疗效优于单次大剂量RIT ; 在一定的剂量范围内 ,小剂量RIT可以起到优于大剂量RIT的抑瘤效果。
- The mean annual dose and the mean accumulated dose for the whole bodywere 0.26 rad and 3.24 rad,respectively. 平均年剂量为0.;26rad;平均累积剂量为3
- In addition,the effect of dose rate of the firs t irradiation on the induced adaptive response was also studied. 另外也探讨了不同剂量和不同剂 量率的预先照射对应性反应的影响。
- A radioactive particle moving in a blood stream causes transient changes of dose rate near its path. 当一个放射性物质在血流中移动时在它的路径附近引起剂量率的瞬间变化。
- In order to improve accuracy of TL authentication test for porcelain, a method of measurement of annual dose using ultrathin (CaSO 4:Tm) dosage layer on porcelain was studied. The TLD was placed on the part of porcelain without glaze. 用CaSO4 :Tm超薄型热释光剂量片放在瓷器无釉或器物内部去釉后的部位 ,用表面TLD法测量瓷器样品中的年剂量。
- The surface UVB irradiance and erythemal UVB dose rate can be expressed by the effective transmission of the ozone layer and united reflectivity due to the scattering layer and the surface. 地面紫外辐射通量密度和生物紫外辐射剂量可以由臭氧层的等效透过率、散射层和地面的联合反射率计算。
- All of the latch-up paths may have an effect on each other or one another due to different triggering dose rate, holding voltage and holding current and then one or more latch-up windows may appear. 各个闭锁路迳因触发剂量率和闭锁维持电压、闭锁维持电流不同而相互影响，可能产生一个或多个闭锁窗口。
- However, since the dose rate is steadily decreasing during the exposure, appropriate allowance for this must be made. 可是，由于在辐照过程中剂量率逐步下降，所以必需进行适当的修正。
- If the dose rate at any time is known by actual measurement, the value at any other time can be estimated. 如果通过实际测量已知任意时刻的剂量率，则可计算出任何其它时刻的数值。
- A method for calculating cosmic radiation dose and dose rate to aircrews in atmosphere is presented in the paper. 本文介绍了一种在大气层中民航飞行高度上宇宙辐射有效剂量率和飞行航程中机组人员所受有效剂量的计算方法。
- The simulating results agree with the experimental results at different absorbed dose rate. 理论模拟结果与实际不同剂量率辐射实验结果符合得很好。
- The WMO standard UV index unit is equal to 25mW/m 2 erythemally weighted dose rate. 世界气象组织规定了单位紫外线指数相当于 2 5 m W/m2 红斑加权剂量率。
- A new parameterization method for retrieving surface UVB irradiance and erythemal UVB radiative dose rate is presented. 提出了一个从卫星观测推算地面UVB辐射通量密度和红斑生物紫外辐射剂量的新的参数化方法。
- That's rather an effective use of color. 这种使用颜色的手法效果相当好。
