radioactive background
英 [ˌreɪdiəʊˈæktɪv ˈbækɡraʊnd]
美 [ˌreɪdioʊˈæktɪv ˈbækɡraʊnd]
网络 天然放射性本底
双语例句
- The committee said the detected levels of radioactive iodine-131 were below one-hundred-thousandth of natural background radiation and not considered harmful.
委员会称此次检测到的碘-131辐射量小于天然本底辐射剂量的十万分之一，不会对公众造成伤害。 - And don't worry about those radioactive everyday items. By scientific measures, the average American gets 620 millirems of radiation each year, half from background exposure, and that number needs to reach 100,000 to be worrisome.
科学测量结果显示，普通美国人每年受到的辐射为620毫仑目，其中一半属于天然本底辐射，而低于100000毫仑目的辐射完全不需要担心。 - Two test methods, natural radioactive background method and decay method, used to verify the detection limit of radioactive aerosol monitors are studied.
研究了放射性气溶胶监测仪的检测方法，即天然本底检测法和衰变检测法。 - 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。 - This paper completely introduces the investigation of environmental radioactive background level before the commissioning of power plant and environment monitoring system of power plant.
文中较全面地介绍了电站运行前的环境放射性本底水平调查和电站的环境监测系统。 - Comprehensive study of radioactive background in the coastal waters of South China Sea Area
南海近海放射性背景值的综合研究 - When studying alarming technology of moving radioactive monitors, we study the statistical characteristic of environmental radiation background.
在研究移动物体放射性监测报警技术的背景下，对环境本底的统计特性进行了研究。 - To improve the detectable limit of radioactive aerosol monitors, it is very important to eliminate the inter-ference of the natural background, i.e. radon and thoron daughter aerosol.
为提高放射性气溶胶监测仪的灵敏度，消除天然本底即氡子体气溶胶的干扰是极为重要的。 - Within the fixed time, when a ratio of measured time for radioactive sample to background equals the ratio of square root of radioactive count for radioactive sample to background, there are minimal measure errors.
在规定的时间内，测量样品放射性的时间和测量本底的时间之比等于放射性总计数和本底计数率之比的平方根时，测量结果的误差为最小。 - It has been shown that the intrinsic radioactive background of the apparatus is 0. 002 cpm/ cm2 ( 2 count/ min).
实验表明，计数器固有本底为0.002计数/（min·Cm~2）（2计数/min）。 - There is not obvious difference between the above and radioactive background.
上列数据与本底无明显差异。 - The Research of Environment ( base) Radioactive Background Level on Gan-Nan Railroad of Jing-Jiu railway
京九线赣南路段环境放射性本底水平的研究 - Survey of Radioactive Basic Standard in Xiamen Port A Talk on the Background
厦门口岸放射性本底调查报告 - This report summarizes the radioactive background measured in the coastal waters of South China Sea for three recent years.
文章为南海近海放射性背景值近三年来监测的工作小结。 - Model FLW-ⅱ material position meter use the least radioactive source activity and the air absorption dose rate about one meter is equal to the natural background.
其中以FLW&Ⅱ型使用的放射源活度最小，距源罐1m处的空气吸收剂量率与自然本底水平基本相当； - By analyzing the radioactive characteristic of the object and the background, the SNR of received IR image was calculated, and then the effective obscuring area of the smoke was also calculated by the method of morphologic ecology.
通过分析目标与背景的辐射特性，计算所获得红外图像的信噪比；利用形态生态学的方法，实现了烟幕有效遮蔽面积的计算，并进行了仿真试验。 - XRF probe uses high energy resolution, electronic cooling Si-PIN semiconductor detector, radioactive isotope as stimulation source, and the "hypotenuse symmetry stimulate" approach to effectively improve the peak to background ratio of characteristic X-ray detection.
X射线荧光探头使用高能量分辨率的电致冷Si-PIN半导体探测器，以同位素放射源作为激发源，采用斜边对称激发方式，有效地提高了特征X射线探测的峰背比。