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不灵敏的
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  insensitive
    The current output for the detector, which is composed of PMT CHφT3 and ST401 plastic scintillator and exposured to a light source with a pulse width of 2400ns, was measured. Also present was the current output for the CHφT3-CeF3 crystal detector which is relatively insensitive to neutrons.
    测量了CHφT3型光电倍增管配上ST401塑料闪烁体,在波形半宽度约2400ns脉冲光源照射下的电流输出情况,还提供了该光电倍增管与对中子相对不灵敏的晶体CeF3组成探测器应用于宽脉冲γ辐射源测量得到的电流输出情况。
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    A Large Dynamic Range Gamma Radiation Detector Insensitive to Neutron Radiation
    一种对中子相对不灵敏的大动态脉冲γ辐射探测器
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    The experiment results indicate that the sensitivity of this detector is about 0.6 and 0.1 with respect to that of usual plastic scintillator ST 401, for 60 Co γ and pulse DT neutron radiation, respectively. The biggest linear current of this detector is above 1.5 A, dark current is lower than 10nA. This kind of detectors is gamma pulse radiation detectors insensitive to neutron radiation with large dynamic range.
    实验测量表明 :CeF3 光电探测器对 60 Coγ灵敏度约为常规塑料闪烁体ST4 0 1探测器的 0 .5— 0 .6倍 ,而对于脉冲DT中子 ,CeF3 探测器灵敏度相对于同尺寸闪烁体ST4 0 1探测器的灵敏度低约 1个量级 ,探测器线性电流大于 1.5A ,暗流小于 10nA ,是一种对中子相对不灵敏的大动态脉冲γ辐射探测器
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    The experiment and calculation study indicate that the neutron sensitivity of combination PIN detector can be adjusted by selecting polyethylene converter,and the detector is insensitive to gammarays. The combination PIN detector can be used to detect pulse neutron in neutron and gamma mixture radiation field.
    实验测量和计算表明 :通过转换靶的选取 ,组合PIN探测器的中子灵敏度在一定范围内连续可调 ,组合PIN探测器对γ的灵敏度比普通PIN探测器低 2个量级 ,是一种对γ不灵敏的新型脉冲中子探测器 .
短句来源
    Neutron solid bubble detector was considered as a unique one for meeting the need of the personal neutron dosimeter recommended by International Committee of Radiation Protection,ICRP60.It has the flat response for neutron from low energy to high energy,and insensitive for gamma rays.
    中子固体气泡探测器被认为是唯一能够满足国际辐射防护委员会ICRP60要求的个人中子剂量计, 它具有从低能中子到高能中子的平坦响应曲线和对γ射线不灵敏的优点.
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  insensitive
The explosive performances of DAAT were calculated theoretically by VLW equation-of-state (EOS) and the results showed that several explosive formulations based on DAAT have high-energy and insensitive performance.
      
Experiments on both synthesis and real datasets show that the new algorithm not only achieves a significant gain of runtime and quality to find subspace clusters, but also is insensitive to input parameters.
      
It is found that the calculated results also agree with M?ller's results and that the MM model is insensitive to the microscopic single-particle potential.
      
It grew well in 95% alcohol disinfectant and was insensitive to 84 disinfectant fluids containing chlorine (1000 mg/L) and such disinfectants as ozone.
      
The bacteria contained a 2.5 kb plasmid and were sensitive to 13 drugs and insensitive to 7 drugs of the 20 drugs tested.
      
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The neutron flux spectra in the core and the reflector of the thermal reactor are measured by multiple foil method. There are 26 kinds of foil detectors selected for the measurements. The neutron energy-range from 10~(-4) eV to 20MeV is divided into 640 groups. In consideration of neutron capture and scatter of foil itself. The neutron self-shielding factors for 14 kinds of thermal and intermediate foils are calculated by single neutron energy approach in each group. The energy-dependent activation cross sections...

The neutron flux spectra in the core and the reflector of the thermal reactor are measured by multiple foil method. There are 26 kinds of foil detectors selected for the measurements. The neutron energy-range from 10~(-4) eV to 20MeV is divided into 640 groups. In consideration of neutron capture and scatter of foil itself. The neutron self-shielding factors for 14 kinds of thermal and intermediate foils are calculated by single neutron energy approach in each group. The energy-dependent activation cross sections of each detector are selected under the requirement of good accuracy and consistency between foils. The results of computed flux spectra and their errors are given, "The macroscopic spectral values", i.e. thermal neutron fluxes, neutron temperatures, values of Fermi-spectrum, Fermispectrnm deviations and integral fast neutron fluxes are given at two measured positions too. The reaction-rates, the uncertainties of cross sections and initial flux spectrum used in the iteration VS. the sentivity of flux spectrum are tested. In the cases of a rather large change of initial flux spectrum the roughly consistent results are obtained. Rather reasonable distributions of flux spectra are also obtained in two energy ranges, one is 0.01 eV, where cross sections of the foils are almost 1/ν, and the other is about 10~500keV, where all foils are insensitive.

用多箔法测定热中子堆内活性区和反射层内的全能区中子通量谱。选择26种探测器,把10~(-4)eV至20MeV的整个能区分为640群,考虑箔自身吸收和散射,按群内中子是单能的计算14种热与中能探测器的自屏因子。按各箔截面互相一致适用原则选择活化反应截面。文中给出计算得的通量谱和谱误差。还给出两测点的“宏观谱量”,包括热中子通量,中子温度,费米谱量,偏离费米谱指数和快中子积分通量。检验了反应率、截面和初始通量谱对解谱的灵敏度。在初始谱变化较大的情况下都获得大体一致的结果。在能量<0.01eV与约10~500keV的两个能区,探测器响应均不灵敏,亦获得合理的通量谱分布。

A method of double detector(T,U)is recommended to determine absorbed dose in(n,γ)mixed field by ICRU report 26.Since the publication of that report,a number of new data about k_u have been obta-ined.It is the purpose of this paper to give a more recent survey of k_uvalues of non-hydrogenous ion chambers and Geiger-mtuller counters forneutron dosimetry.

本文对用双探测器法测定(n,γ)混合场吸收剂量中有关中子不灵敏剂量计的相对中子灵敏度k_U,从计算和测量两个方面,就 ICRU26号报告发表后近十年的研究工作进展做了简短评述。

Counting efficiencies for alpha particles emitted from the front and the back of 30,105,200 and 400 mesh wire screens were measured for ultrafine radon daughter aerosols deposited at linearvelocities in the range 5.1 to 30.8 cm/s.Mean activity median aerodynamic diameters(AMAD)forthe ultrafine Po-218,Pb-214 and Bi-214 particles were 0.85(±0.44),1.6(±0.8)and 2.4(±2.0)nm(diffusion coefficients 0.068,0.044 and 0.042 cm~2/s),respectivly,as determined fromgraded wire screen array analysis of the test atmosphere.For...

Counting efficiencies for alpha particles emitted from the front and the back of 30,105,200 and 400 mesh wire screens were measured for ultrafine radon daughter aerosols deposited at linearvelocities in the range 5.1 to 30.8 cm/s.Mean activity median aerodynamic diameters(AMAD)forthe ultrafine Po-218,Pb-214 and Bi-214 particles were 0.85(±0.44),1.6(±0.8)and 2.4(±2.0)nm(diffusion coefficients 0.068,0.044 and 0.042 cm~2/s),respectivly,as determined fromgraded wire screen array analysis of the test atmosphere.For wire screen collection efficiencies<0.8,the FT ratio was found to be insensitive to the screen and sampling parameters.With increasingcollection efficiency,the FT ratio was found to increase,up to a maxmium value of 0.86(±0.03)for collection efficiencies>0.999.For the four screen types studied,the mean screen loss factor at alinear velocity of 21.1 cm/s was 1.04(±0.01).

测量了在线速度为5.1 Cm~(-1)。至30.8 cm s~(-1)条件下沉积在30、105、200、400目金属丝网筛正面和背面上的超微态氡子体α粒子的计数效率。根据用串级金属丝网筛方法的测定结果,这些超微态~(218)po、~(214)Pb 和~(214)Bi 粒子的活度中值空气动力学直径(AMAD)分别为0.85(±0.44)、1.6(±0.8)和2.4(±2.0)nm;相应的扩散系数分别为0.068、0.044和0.042 cm~2·s~(-1)。研究发现在丝网筛收集效率小于0.8的情况下,FT 值(前总活度比)对丝网筛参数和采样参数不灵敏,平均值为0.67(±0.02)。但当丝网筛收集效率增加时 FT 值增加,收集效率大于0.999时,FT,值增至0.86(±0.03)。丝网筛上α粒子相对滤膜上α粒子的计数损失因子(SL)在线速度为21.2 cm·s~(-1)条件下的均值±均值标准差为1.04±0.01。模拟α粒子损失的蒙特卡罗计算表明,SL 对α粒子在丝网上的沉积分布不灵敏,主要决定于计数的几何条件。

 
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