助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   sum 在 核科学技术 分类中 的翻译结果: 查询用时:0.063秒
图标索引 在分类学科中查询
所有学科
核科学技术
数学
物理学
计算机软件及计算机应用
电信技术
企业经济
建筑科学与工程
自动化技术
宏观经济管理与可持续发展
更多类别查询

图标索引 历史查询
 

sum    
相关语句
  
    The average annual effective dose equivalent to radon daughters taken by the workers on the pool is 0.723 mSv and to the γ radiation 1.93 mSv. The sum is 6.7% of dose limit for occupational radiation workers.
    尾矿库管理人员的年有效剂量当量来自氡子体的平均值为0.723mSv,来自γ辐射的平均值为1.93mSv,两者之占职业照射人员的年容许剂量当量的6.7%。
短句来源
    Based on HPGe detector with high efficiency and resolution for low energy Xray, we have measured the specific activity of 139Ce by sumpeak method. The result obtained is 762.9(1±0.5%)Bq/mg, which is well agreed with recommended result 765.9(1±0.6%)Bq/mg of native compared measurement in uncertainty. 
    采用对低能X射线具有高探测效率高分辨率的HPGe探测器,用峰法测量了139Ce溶液的比活度,测量的结果为762.9(1±0.5%)Bq/mg,,国内比对推荐值为765.9(1±0.6%)Bq/mg,二者在不确定度范围内符合得很好。
短句来源
    The results show that the doping with small amount of A12 O3 and SiO2 powders can promote grain growth during sintering, but an excess of additive leads to suppression of pellet densification, when the sum of A12O3 and SiO2 powders is constant ;
    结果表明:加入少量的Al_2O_3SiO_2,可有效促进烧结过程中UO_2芯块的晶粒度长大,过量加入则会阻碍烧结过程中UO_2芯块的致密化;
短句来源
    DISJOINT SUM EXPANSION METHOD IN FTA
    故障树分析中的不交展开
短句来源
    Consistency and Sum Rule in Relativistic Nuclear Many-body Theory
    相对论核多体理论中的自洽问题规则
短句来源
更多       
  总和
    The experimental results show that the pulse distribution under the lower gas amplification and monoenergetic soft-X-rays radiatipn is a weighted sum of P distribution.
    本文从实验上和理论上研究单电子和少数日电子在正比管内产生脉冲的情况。 认为在低气体放大倍数时,单能软X射线在正比管内产生脉冲幅度分布是Г分布的加权总和
短句来源
  求和
    The D→Kl■ decay is researched by means of the light-cone QCD sum rules and the form factor is calculated by choosing a new correlative function to eliminate the effect caused by the uncertainty of twist-3 function.
    文章用光锥QCD求和规则研究D→Kl■珓衰变过程,计算了D→K跃迁形状因子,通过构造新的关联函数,消除了由twist-3波函数的不确定性给计算结果所带来的影响,从而使计算结果更加精确.
短句来源
    Q~2-Dependence of the Gerasimov-Drell-Hearn Sum Rule
    Gerasimov-Drell-Hearn求和规则的Q~2依赖性质
短句来源
    RESEARCH ON B→π TRANSITIONS FORM FACTOR IN LIGHT CONE QCD SUM RULES
    用光锥QCD求和规则研究B→π跃迁形状因子
短句来源
    The uncertainties of calculation of form factors in light-cone QCD sum rules mainly come from light-cone wave function among which twist-2 and twist-3 wave function make significant contributions to form factors.
    在光锥QCD求和规则中 ,形状因子的计算结果的不确定性主要来自于光锥波函数 ,twist- 2 ,twist- 3的波函数是主要贡献的波函数 .
短句来源
    In this paper, the B→π transitions form factor was calculated in improved light-cone QCD sum rules and compared with standard light-cone QCD sum rules.
    本文用改进的光锥 QCD求和规则计算 B→ π跃迁形状因子 ,并与标准的光锥 QCD求和规则的结果进行比较 .
短句来源
查询“sum”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  sum
We show that ${\mathcal M}(G,R)$ is a symmetric tensor category, i.e., the motive of the product of two projective homogeneous G-varieties is a direct sum of twisted motives of projective homogeneous G-varieties.
      
We also study the problem of uniqueness of a direct sum decomposition of objects in ${\mathcal M}(G,R).$ We prove that the Krull--Schmidt theorem holds in many cases.
      
For a split reductive algebraic group, this paper observes a homological interpretation for Weyl module multiplicities in Jantzen's sum formula.
      
The new interpretation makes transparent for GLn (and conceivable for other classical groups) a certain invariance of Jantzen's sum formula under "Howe duality" in the sense of Adamovich and Rybnikov.
      
From elements of the invariant algebra C[V]G we obtain, by polarization, elements of C[kV]G, where k ≥ 1 and kV denotes the direct sum of k copies of V.
      
更多          


A gridded ionization chamder with low background and large area of 1500 cm~2 has deen developed,It is filled with P_(10)gas of some 1.8 atmospheres,and the capacity between its collector and ground is 20PF.Contributions from several main factors to spectrum width are:electronic noise-20 keV;ionization straggling—16keV;grid inefficiency faetor—11.3 keV;electrons collection time variation—3.5 keV;self-absorption of the source thiekness—30keV,respectively.The sum is adout 41.2keV.The background was about...

A gridded ionization chamder with low background and large area of 1500 cm~2 has deen developed,It is filled with P_(10)gas of some 1.8 atmospheres,and the capacity between its collector and ground is 20PF.Contributions from several main factors to spectrum width are:electronic noise-20 keV;ionization straggling—16keV;grid inefficiency faetor—11.3 keV;electrons collection time variation—3.5 keV;self-absorption of the source thiekness—30keV,respectively.The sum is adout 41.2keV.The background was about 6.1 cph(4-6 MeV)and 0.1 eph(over spectral line width of 50 keV at 5 MeV).A new developed zirconium oxidepump was used to clear negatively charged gases.Therefore,long-term stable work was ensured.The minimum detectable activity is 10~(-14)-10~(-15)Ci

研制了一台大面积低本底α屏栅电离室,其阴极表面积为1500cm~2,收集极对地电容约20pF,充以1.8大气压的 P_(10)气体(90%氩+10%甲烷)。分析了几种主要因素对能量分辨率的贡献,在源自吸收贡献为30keV 情况下,对~(210)Poα源的能量分辨率约为41keV。在4—6MeV 能区内装置的本底为6.1cph,在5MeV 处50keV 谱宽内的本底为0.1cph。采用新试制的氧化锆除氧炉循环净化负电性气体,以保证长时间稳定工作。对~(210)Po 电沉积小源测得的分辨率约为35—45keV;对于厚度为40μg/cm~2的1500 cm~2大源测得的分辨率平均为69keV,和估算值相符。最低可测放射性强度为10~(-14)—10~(-15)Ci。

A new precise instrument for determination of the absolute disintegration of 3, a emitter solutions by the method of liquid scintillation counting is described. The instrument includes a triple phototube liquid scintillation detector and three output counting channels which are used for the number of triple coincidences Nc, the number of sum of double coincidences ND and the number of sum of single phototube counting NE seperately. This instrument is based on the principle of extrapolating the triple...

A new precise instrument for determination of the absolute disintegration of 3, a emitter solutions by the method of liquid scintillation counting is described. The instrument includes a triple phototube liquid scintillation detector and three output counting channels which are used for the number of triple coincidences Nc, the number of sum of double coincidences ND and the number of sum of single phototube counting NE seperately. This instrument is based on the principle of extrapolating the triple to double coincidence ratio (TDCR) to unity.Examples of application of the instrument for 3H and 14C are given.The instrument has two main advantages: 1. Higher accuracy. The overall measurement uncertainty(3σ), for 3H, 63Ni, 35S and 14C etc. is in 0.5-1.5%. 2. Easy to operate. The measurement time is much less than usual metrology instrument.

本文描述用液体闪烁计数法直接测定α、β发射体溶液放射性活度的计量仪器。该仪器包括三个光电倍增管的符合探测器和三个输出计数道;以三重对两重符合计数率之比(TDCR)为猝灭参数,通过外推效率曲线至TDCR=1直接得到核素的活度。该仪器用于放射性活度绝对测量至少有两个突出的优点:1.精确度较高,对~3H、~(63)Ni和~(14)C等多种β、α核素其总测量不确定度(3σ)在0.5—1.5%;2.操作简便,测量迅速。

The monitoring results of radioactive and nonradioactive harmful materials in the environment surrounding a uranium tailing pool are reported. The distribution of radon and its daughters in the environment is investigated. The results show that the radon exhalation rate of upper layer tailings is averaged 1.92±0.35 Bqm-2s-l, and the mean concentration of radon in the air above the pool is 42.8±6.0 Bqm-3, the concentration of radon daughters (1.02±0.09)× l0-1μJm-3, and the radon concentration in various sectors...

The monitoring results of radioactive and nonradioactive harmful materials in the environment surrounding a uranium tailing pool are reported. The distribution of radon and its daughters in the environment is investigated. The results show that the radon exhalation rate of upper layer tailings is averaged 1.92±0.35 Bqm-2s-l, and the mean concentration of radon in the air above the pool is 42.8±6.0 Bqm-3, the concentration of radon daughters (1.02±0.09)× l0-1μJm-3, and the radon concentration in various sectors in a distance of 1-3 km from the pool decreases to 9.3±0.8 Bqm-3 (about the background level). The average annual effective dose equivalent to radon daughters taken by the workers on the pool is 0.723 mSv and to the γ radiation 1.93 mSv. The sum is 6.7% of dose limit for occupational radiation workers. The additional annual effective dose equivalent to the nearby residents is 2.1 × 10-2 mSv from radon daughters and 5.6×10-2 mSv from γ radiation. The sum is about 7.7% of the dose limit for the public. It is recommended that decommissioning tailing pools are covered with soil and plant. The experiment show that radon exhalation rate decreases to 0.302 Bqm-2 s-1 and γ radiation to 1.13×10-1 μ-Gyh-1 when a tailing pool is covered with clayey soil of 0.5 m thickness.

本文报道了铀水冶尾矿库环境中的放射性和非放射性有害物质的监测结果。对氡及其子体在环境中的分布作了调查,结果表明,表层尾矿的氡析出率平均为1.92±0.35Bq/m~2s,尾矿库空气中氡浓度平均为42.8±6.0Bq/m~3,氡子体浓度平均为(1.02±0.09)×10~(-1)μJ/m~3,不同方位离覆矿库1—3km范围的氡浓度降至9.3±0.8Bq/m~3(本底水平)。尾矿库管理人员的年有效剂量当量来自氡子体的平均值为0.723mSv,来自γ辐射的平均值为1.93mSv,两者之和占职业照射人员的年容许剂量当量的6.7%。附近居民通过尾矿库所增加的年有效剂量当量,氡子体为2.1×10~(-2)mSv,γ辐射为5.6×10~(-2)mSv,两者之和约为广大居民的年限制剂量当量的7.7%。对退役尾矿库提出尾土植被措施,在尾矿库表面覆盖厚0.5m粘性较大的黄土时,氡析出率降至0.302Bq/m~2s,γ辐射强度降至1.13×10~(-1)μGy/h。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关sum的内容
在知识搜索中查有关sum的内容
在数字搜索中查有关sum的内容
在概念知识元中查有关sum的内容
在学术趋势中查有关sum的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社