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gamma radiation dose rate
相关语句
  γ辐射剂量率
     ESTIMATION OF THE METHOD ERRORS FOR DEDUCTING THE RESPONSE TO COSMIC-RAY IN MEASURING TERRESTRIAL GAMMA RADIATION DOSE RATE
     测量陆地γ辐射剂量率中扣除宇宙射线响应的方法误差估计
短句来源
     2)grid point-weighted average value for road gamma radiation dose rate is 61.8nGy·h~(-1)and theaverage value of the ratio of D_r to D_f is 0.98;
     (2)D_道按网格点加权均值为61.8nGy/h,道路和原野γ辐射剂量率比值的平均值(?)
短句来源
     It is needed to deduct the response to cosmic-ray from meter readings R for measuring terrestrial gamma radiation dose rate D_γ by sintilation gamma dose rate meter with energy compensation. For this purpose,there are two methods usually adopted:Method Ⅰ:(?) _(γ,1)=R-R_w((?)
     在用有能量补偿的闪烁型γ辐射剂量率仪测定陆地γ辐射剂量率D_γ时,需要从读数R中扣除对宇宙射线的响应。
短句来源
     Through the distribution of the measur-ing points over the area(without Taiwan Province)of the country basically using the grid size of 25×25kin in sampling network,environmental gamma terrestrial radiation dose rates were investigated,in-cluding field gamma radiation dose rate,D_f,road gamma radiation dose rate,D_r,and indoor gamma radiation dose rate,D_(in),which all refers to absorbed dose rate in air 1 m above ground.
     在全国960万km~2。 面积上(不包括台湾省),基本以25×25km 网格均匀布点调查了环境陆地γ辐射剂量率(分原野γ辐射剂量率 D_原,道路γ辐射剂量率 D_道和室内γ辐射剂量率 D_室;均指离地面1m 高处的空气吸收剂量率);
短句来源
  “gamma radiation dose rate”译为未确定词的双语例句
     The main results aehieved in the survey are as follows:1)acording to the nationwide statistical data from 8805 grid points all over the country,the area-weighted and population-weighted average values of field gamma radiation dose rate are 62.8and 62.1nGy·h~(-1)respeetively;
     调查所得主要结果如下:(1)按全国8805个网格点统计的 D_原按面积、按人口加权均值分别为62.8、62.1nGy/h。
短句来源
  相似匹配句对
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     蜡烃的γ辐射磺氧化
短句来源
     Problems of Measuring Gamma Radiation
     伽玛辐射测量中应注意的几个问题
短句来源
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短句来源
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短句来源
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This paper introduced the principle for establishing the invest-igation program,measures of quality assurance and main resuhs relating tothe investigation of the first environmental natural radioactive level throu-ghout the country including ZheJiang province,Liaoning province,Guizhouprovince,Wuhan city and Baotou city,that was organized by the NationalEnvironmental protection Agency.The total area for investigation was 43.81×10~4 km~2 and the population totalled 11047×10~4,that was respectivelyaccounted for...

This paper introduced the principle for establishing the invest-igation program,measures of quality assurance and main resuhs relating tothe investigation of the first environmental natural radioactive level throu-ghout the country including ZheJiang province,Liaoning province,Guizhouprovince,Wuhan city and Baotou city,that was organized by the NationalEnvironmental protection Agency.The total area for investigation was 43.81×10~4 km~2 and the population totalled 11047×10~4,that was respectivelyaccounted for 4.6% and 10.6% of the whole country.The numbers of mea-suring point for dose rate from terrestrial gamma radiation were 3255,whilethe analysis numbers for soil and water sample were 1335 and 878 respecti-vely.The main measures to be adopted for quality assurance in this investi-gation were as follows:1.Technical co-ordinating group,including the backbone techniciansof radioactivity monitoring in national environmental monitoring system andrelated experts at home,compiled“Tentative rules on the investigation ofnatural environmental radioactive level”.2.Engaging the Institute of the Radiation Protection of the Ministryof Nuclear Industry and the Institute of Atomic Energy as quality assuranceand technical advisory units that are responsible for accepting,calibrating and intercomparing the external exposure dose rate instruments;identifyingthe standard analysis samples and mutnal inspection between laboratories ofU,Th,Ra and K in soil and water;and providing advisory views to“Ter-ntative Rules”and“Implementation Regulation”.3.We have held technical training courses for the main technical super-visors of the units and its basic units which bear the responsibility of inver-stigating task,in order to define their tasks,methords and norms.4.All provinces(cityes)have conducted investigation at selected pintsand established the corresponding“the Implementation Regulation for Tenta-tive Rules”on this base.5.During the investigation of terrestrial gamma radiation level,Weoganized two instrument intecomparisons in April and November,1984 respec-tively.6.We have established a set of quality control system in laboratoriesand between laboratories for the samples analysis of soil and water,wasapproved twice by Institute of Radiation Protection of the Ministry of Nuc-lear Industry.7.We have unified the requests of data processing and final report.The investigation results of the terrestrial gamma radiation dose rate andnatural radionuclides content in soil are illustrated in table 1,and the radio-nuclides concentration is illustrated in table 2

本文介绍了浙江、辽宁、贵州三省及包头、武汉两市环境天然放射性水平调查方案的制定原则,质量保证措施及主要调查结论。对正在进行或即将开展此类工作的其它省(市),本文也提出了若干可供参考的建议。调查结果表明,三省两市陆地γ辐射剂量率(不包括宇宙射线贡献在内的,天然γ辐射在离地面1m 高处空气中产生的吸收剂量率),以省或市为单位的地区平均值在(5.78~7.23)×10~(-8)Gyh~(-1)之间,五省(市)按面积加汉的平均值为6.49×10(?)Gyh~(-1),按人口加权的平均值为6.44×10~(-8)Gyh~(-1)五省(市)土壤和水体中的天然放射性核素含量,基本上属于正常水平;开采与冶炼伴有放射性钍、铀系核素的矿物,是五省(市)人为活动造成环境放射性活染的主要来源。

It is needed to deduct the response to cosmic-ray from meter readings R for measuring terrestrial gamma radiation dose rate D_γ by sintilation gamma dose rate meter with energy compensation.For this purpose,there are two methods usually adopted:Method Ⅰ:(?)_(γ,1)=R-R_w((?)_c/(?)_(cw))Method Ⅱ:(?)_(γ,2)=R-(R_w/R_(w0))(?)_cwhere R_w and R_(w0)are the responsive value of sintilation gamma dose rate meter and high pressure ion-ization chamber respectively above large area...

It is needed to deduct the response to cosmic-ray from meter readings R for measuring terrestrial gamma radiation dose rate D_γ by sintilation gamma dose rate meter with energy compensation.For this purpose,there are two methods usually adopted:Method Ⅰ:(?)_(γ,1)=R-R_w((?)_c/(?)_(cw))Method Ⅱ:(?)_(γ,2)=R-(R_w/R_(w0))(?)_cwhere R_w and R_(w0)are the responsive value of sintilation gamma dose rate meter and high pressure ion-ization chamber respectively above large area of water body near measuring points,D_c and D_(cw) are absorbed dose rate in air at measuring points and above water surface respectively.In this paper,the method errors of the two deducting methods and their variation with △h,(?)_b,R_w/R_(w0) were estimated by:(1)analyzing each component involved in R,R_w and R_(w0) respectively;(2)the range of altitude dif- ference △h between measuring points and the water surface within measuring region;and(3)the mag-nitude and range of other main parameters——meter background dose rate_o,dose rate _(γw),due to ~(222)Rn,~(220)Rn and their daughters in air above the water surface,and R_w,/R_(w0).The results showed that as (?)_γ=6.0×10~(-8)Gy·h~(-1),the method errors of the two deduction methods were less than 3.5 and 2.5% for single measuring point value respectively;and 2.0 and 1.5% respectively for average value from measuring points distributed uniformly over a region of altitude(from 1000 to 1500m)respectively.The characteristics on applicability of the two methods were also discussed.

在用有能量补偿的闪烁型γ辐射剂量率仪测定陆地γ辐射剂量率D_γ时,需要从读数R中扣除对宇宙射线的响应。一般采用以下两种近似扣除方法:方法Ⅰ:D_(γ.1)=R-R_w(D_c/D_cw)方法Ⅱ:D_(γ.2)=R-(R_w/R_(wd))D_c式中,R_w 和 R_(w0)分别是闪烁型剂量率仪和高压电离室在邻近测点的大水面上的响应值;D_e和D_cw分别是在测点和水面处宇宙射线电离成分产生的空气吸收剂量率。本文从分析 R、R_w 和 R_(w0)所包含的各个分量着手,结合实用中测点和水面海拔高度之差△h 的范围和仪器本底剂量率、水面上方空气中氡、(气土)子体和水中γ核素贡献的剂量率、R_w/R_(w0)等参数的大小及范围,估计这两种扣除方法的方法误差及其随△h、D_o、R_w/R_(w0)等主要参数的变化情况。结果表明,在(?)=6.0×10~(-8)Gy·h~(-1)时,用方法Ⅰ,平均值(在海拔高度为1000—1500 m 范围内均匀布点情况下)的方法误差不超过2%。单点方法误差一般不超过3.5%;用方法Ⅱ,平均值的方法误差不超过1.5%,单点方法误差一般不超过2.5%。文中还讨论了两种方法在适用性上的一些...

在用有能量补偿的闪烁型γ辐射剂量率仪测定陆地γ辐射剂量率D_γ时,需要从读数R中扣除对宇宙射线的响应。一般采用以下两种近似扣除方法:方法Ⅰ:D_(γ.1)=R-R_w(D_c/D_cw)方法Ⅱ:D_(γ.2)=R-(R_w/R_(wd))D_c式中,R_w 和 R_(w0)分别是闪烁型剂量率仪和高压电离室在邻近测点的大水面上的响应值;D_e和D_cw分别是在测点和水面处宇宙射线电离成分产生的空气吸收剂量率。本文从分析 R、R_w 和 R_(w0)所包含的各个分量着手,结合实用中测点和水面海拔高度之差△h 的范围和仪器本底剂量率、水面上方空气中氡、(气土)子体和水中γ核素贡献的剂量率、R_w/R_(w0)等参数的大小及范围,估计这两种扣除方法的方法误差及其随△h、D_o、R_w/R_(w0)等主要参数的变化情况。结果表明,在(?)=6.0×10~(-8)Gy·h~(-1)时,用方法Ⅰ,平均值(在海拔高度为1000—1500 m 范围内均匀布点情况下)的方法误差不超过2%。单点方法误差一般不超过3.5%;用方法Ⅱ,平均值的方法误差不超过1.5%,单点方法误差一般不超过2.5%。文中还讨论了两种方法在适用性上的一些特点。

This paper gives an overview of the results and methods presented in the Nationwidesurvey of Environmental Radioactivity Level in China organized by The National Environment Protec-tion Agency during a time period from 1983 through to 1990 with the main aim of ascertaining thecurrent level,distribution and pattern of radioactivity in China.Through the distribution of the measur-ing points over the area(without Taiwan Province)of the country basically using the grid size of 25×25kin in sampling network,environmental...

This paper gives an overview of the results and methods presented in the Nationwidesurvey of Environmental Radioactivity Level in China organized by The National Environment Protec-tion Agency during a time period from 1983 through to 1990 with the main aim of ascertaining thecurrent level,distribution and pattern of radioactivity in China.Through the distribution of the measur-ing points over the area(without Taiwan Province)of the country basically using the grid size of 25×25kin in sampling network,environmental gamma terrestrial radiation dose rates were investigated,in-cluding field gamma radiation dose rate,D_f,road gamma radiation dose rate,D_r,and indoor gamma radiation dose rate,D_(in),which all refers to absorbed dose rate in air 1 m above ground.At the same time and,at the same points,soil samples were also collected to survey the contents of~(232)Th,~(238)U,~(226)Ra and ~(40)K in soil and,at the same Ideations as previously used in nonradioaetivity sur-vey,the concentrations of Th,U,~(226)Ra and ~(40)K in waters of different types were investigated.As wellaround the offsite areas surrounding nuclear industries and the possible areas where artificially imposedradioactive contamination would appear,investigation was conducted by adding points densely.The main results aehieved in the survey are as follows:1)acording to the nationwide statistical data from 8805 grid points all over the country,the area-weighted and population-weighted average values of field gamma radiation dose rate are 62.8and 62.1nGy·h~(-1)respeetively;2)grid point-weighted average value for road gamma radiation dose rate is 61.8nGy·h~(-1)and theaverage value of the ratio of D_r to D_f is 0.98;3)population-weighted average values for indoor gamma radiation dose rate is 99.1nGy·h~(-1)andthe average value of the ratio of D_(in)to D_f is 1.64;4)the point-weighted and population-weighted average values for radiation dose rate due to cos-mic ray ionizing component excluding neutron component are 39.9 and 32.5 nGy·h~(-1)out-doors and 35.4 and 28.5nGy·h~(-1)indoors respectively;5)per capita annual effective dose quivalents to our population from natural gamma radiation andcosmic rays are 0.55 and 0.26mSv respectively;6)area-weighted average values of the contents of ~(232)Th,~(238)U,~(226)Ra,and ~(40)K in the soil(dryedsamples)from 7777grid points all over the country are 49.1,39.5,36.5,and 580.0Bq·kg~(-1)respectively;gamma radiation dos rate in air lm above ground calculated using the Beckformula and assuming water content rate of 10% is 65.7nGy·h~(-1),which is 5% higher thanthe measured result;7)for the concentrations of U,Th,~(226)Ra and ~(40)K in river,lake,reservoir,offishore water,spring,and well and tap water,as collated and collated according to 6611 samples from 4021 points,the value for U is in the order of magnitude of μg·L~(-1),except in case of saltwater lake;thevalue for Th is of the order of magnitude of 10~(-1)μg·L~(-1);the value for ~(226)Ra is of the order ofmagnitude of mBq·L~(-1)except for hot spring;and the value for ~(40)K range from 60 to 200 mBq·L~(-1)except in case of sea,saltwater lake and hot spring.Through this survey,useful baseline data for the nomitoring and manasement of the environmen-tal radioaetivity in our country have been gained.Among them some will be of value to the researchworks in aspects of geology,radioecology and building materials.

本文介绍在1983—1990年间国家环境保护局组织的以全面摸清我国环境天然放射性现状水平、分布及其规律为主要目的的全国环境天然放射性水平调查的结果和方法的概要。在全国960万km~2。面积上(不包括台湾省),基本以25×25km 网格均匀布点调查了环境陆地γ辐射剂量率(分原野γ辐射剂量率 D_原,道路γ辐射剂量率 D_道和室内γ辐射剂量率 D_室;均指离地面1m 高处的空气吸收剂量率);与此同位布点,同时采集土壤样品,调查了土壤中~(238)U、~(226)Ra、~(232)Th 和~(40)K 含量;还与非放射性监测同位布点调查了各类水体中的 U、~(226)Ra、Th 和~(40)K 浓度。并在核企业和可能发生人为污染的地区周围作了加密布点调查。调查所得主要结果如下:(1)按全国8805个网格点统计的 D_原按面积、按人口加权均值分别为62.8、62.1nGy/h。(2)D_道按网格点加权均值为61.8nGy/h,道路和原野γ辐射剂量率比值的平均值(?)0.98。(3)D_室按人口加权的均值为99.1nGy/h,(?)=1.64。(4)宇宙射线电离成分所致空气吸收剂量率按点和按人口加权均值,室外分别为39...

本文介绍在1983—1990年间国家环境保护局组织的以全面摸清我国环境天然放射性现状水平、分布及其规律为主要目的的全国环境天然放射性水平调查的结果和方法的概要。在全国960万km~2。面积上(不包括台湾省),基本以25×25km 网格均匀布点调查了环境陆地γ辐射剂量率(分原野γ辐射剂量率 D_原,道路γ辐射剂量率 D_道和室内γ辐射剂量率 D_室;均指离地面1m 高处的空气吸收剂量率);与此同位布点,同时采集土壤样品,调查了土壤中~(238)U、~(226)Ra、~(232)Th 和~(40)K 含量;还与非放射性监测同位布点调查了各类水体中的 U、~(226)Ra、Th 和~(40)K 浓度。并在核企业和可能发生人为污染的地区周围作了加密布点调查。调查所得主要结果如下:(1)按全国8805个网格点统计的 D_原按面积、按人口加权均值分别为62.8、62.1nGy/h。(2)D_道按网格点加权均值为61.8nGy/h,道路和原野γ辐射剂量率比值的平均值(?)0.98。(3)D_室按人口加权的均值为99.1nGy/h,(?)=1.64。(4)宇宙射线电离成分所致空气吸收剂量率按点和按人口加权均值,室外分别为39.9和32.5nGy/h,室内分别为35.4和28.5nGy/h。(5)天然γ辐射和宇宙射线所致我国居民人均年有效剂量当量分别为0.55和0.26mSv。(6)按7777个网格点统计的全国土壤中(干样)~(238)U、~(226)R

 
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