natural radioactivity
英 [ˈnætʃrəl ˌreɪdiəʊæk'tɪvəti]
美 [ˈnætʃrəl ˌreɪdioʊæk'tɪvəti]
自然放射性；天然放射性
双语例句
- This paper reports the investigation results of natural radioactivity level in river, lake, reservoir, spring, well and tap water in Qirighai Province.
本文报道了青海省江河、湖泊、水库、泉、井和自来水中天然放射性核素浓度的调查结果。 - The Investigation of Natural Radioactivity in Water Environment in the Lower Reaches of the Dadu River
大渡河下游地区地下水放射性环境水平现状调查 - Analysis of natural radioactivity level of the typical fly ash from guizhou province
贵州典型粉煤灰天然放射性水平分析 - Environmental survey and assessment of natural radioactivity for a certain area of Jiangsu province
江苏省某地区天然放射性环境调查与评价 - The investigation and analysis on natural radioactivity nuclide specific activity of cement product in china
我国水泥产品天然放射性核素比活度的调查分析 - Investigation of natural radioactivity level of the waters in Baotou Area
包头地区水体中天然放射性水平调查 - Objective To investigate the total natural radioactivity levels in the soil of part area of Suzhou city.
目的了解苏州市部分地区土壤中总α、总β放射性本底水平及其变化情况。 - Survey of natural radioactivity level of the waters in china ( 1983& 1990)
全国水体中天然放射性核素浓度调查（1983&1990年） - Analysis on Natural Radioactivity Levels in Import Granite Building Materials
进口花岗岩石材中天然放射性水平检测分析 - Natural radioactivity level of soils and building materials used in Hong Kong and resulting dose assessment
香港地区土壤和建筑材料中天然放射性水平及天然辐射所致居民剂量估算 - Objective To explore the natural radioactivity level of outdoor, indoor radon concentration and its influencing factors in Nanjing, and to provide bases for making up sanitary standard for school environment.
目的了解南京市区原野和道路的天然放射性水平、居室内氡浓度及其影响因素，为学校环境卫生标准的制订提供依据。 - Natural radioactivity level of some building materials in Guangzhou
广州市部分建筑材料产地天然放射性水平研究 - The natural radioactivity measurement in building materials by γ ray spectrometry
建筑材料中天然放射性的γ能谱分析 - Investigation on Measurement Methods for Natural Radioactivity in Environmental Geological Survey of Qingdao City
青岛市天然放射性环境地质调查中测量方法探讨 - National database of environmental natural radioactivity level and its application
全国环境天然放射性水平数据库及其应用 - Some Applications of Natural Radioactivity in Industry and Agriculture
天然放射性在工农业中的一些应用 - The Research on the Evaluation of Urban Environmental Natural Radioactivity
城市环境天然放射性评价研究 - Natural radioactivity of the main buildings and various building materials in Jiangxi
江西省主要建筑类型及建筑材料中天然辐射的研究 - Between CEC and intensity of natural radioactivity, richness of radioactivity elements in source rock;
CEC与自然放射性强度及自然放射性元素丰度之间有正相关关系； - Experimental results and theoretical analysis show that the new method can effectively measure the porosity of a core with a certain intensity of natural radioactivity, and has the special advantage for determining the residual fluid saturation of a core after displacement.
实验测量结果和理论分析表明，天然氡气法能够有效地测定具有一定天然放射性水平岩心的孔隙度，并特别利于于驱替后岩心的残余流体饱和度的测定。 - Based on the natural radioactivity of potassium, the contents of potassium in solid potash fertilizer products were determined by radioactivity method.
基于钾的天然放射性，用放射性方法测定固体钾肥产品中的钾含量。 - This paper described the principle of surveying under ground water according to the variation of background of natural radioactivity. The various measuring methods and available detectors were analyzed and compared.
本文介绍了利用天然放射性自然本底的变化来寻找地下储水构造的原理，并且分析，比较了各种测量方法和各种可利用的探测器优缺点。 - To determine the natural radioactivity level of the rocks used to decorate in Shanghai market.
[目的]了解上海市场上常用的装饰用石材的天然放射性水平。 - To assess the radiological hazard of the natural radioactivity in soil, the absorbed dose rate and annual effective dose rate were calculated.
在测得放射性核素226Ra、232Th和40K的比活度此基础上，计算了距地面1m高处空气中γ辐射吸收剂量率和年有效剂量率，并对γ辐射外照射水平进行了评价。 - Radiometric sorting is a separation method in which the natural radioactivity of ores and their different reaction after being radiated are used for separating useful minerals and waste rocks.
辐射分选是利用含有用元素的矿块和废石块在受照射后反应的差别或其本身放射性的差别而将矿石与废石分开的一种分选方法。 - The present paper makes an approach to feasibility and technique of the application of gamma-ray spectrometry to the assessment of environmental natural radioactivity in uranium exploration.
在铀矿找矿工作中，许多地区开展了γ能谱测量，如何将γ能谱资料应用到环境天然放射性水平评价中，本文从其可行性及技术方法进行探索研究。 - The methods of urban environment's natural radioactivity were investigated through abundances of experiments and field measurements.
通过大量的实验和野外测量，对城市环境天然放射性评价方法进行了研究。 - Measurements of natural radioactivity in building materials with a Ge ( Li) spectrometer
用Ge（Li）γ谱仪测定建筑材料中天然放射性 - The contents of U, K, Th and other trace elements were determined by INAA, while Ra content was analysed by natural radioactivity survey.
用INAA测定U、Th、K及其它微量元素含量，用天然放射性测Ra含量。 - Gamma ray logging, which is based on gamma ray radiation field uses natural radioactivity of natural radioelement in stratum to accomplish the aim of logging.
自然伽玛测井（GammaRayLogging）利用伽玛辐射场，通过测量地层中天然放射性元素的自发衰变产生的伽玛射线来实现测井目的测井技术。