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几率
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  probability
     THE PROBABILITY OF π~-→π°+ e+ DECAY IN THE CASE OF NON-CONSERVED WEAK CURRENT
     弱电流不守恒情况下π~-→π~0+e+■过程的几率
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     PROBABILITY OF PROMPT NEUTRON EMISSION FROM SPONTANEOUS FISSION OF Pu~(240)
     Pu~(240)自发裂变放出瞬时中子数目的几率分布
短句来源
     INTRODUCTION OF THE CONCEPT OF THE DEPAIRING PROBABILITY TO EXPLORE NUCLEAR HIGH SPIN STATES
     关于引入拆对几率概念探索原子核高自旋态
短句来源
     Transmission Probability Calculation of Turbomolecular Pump Vanes Using Monte Carlo Method
     蒙特卡罗法计算涡轮分子泵叶列的传输几率
短句来源
     NUMERICAL CALCULATION OF THE ESCAPE PROBABILITY USING CLAUSING'S INTEGRAL EQUATION FOR THE STEADY MOLECULAR FLOW IN THE CIRCULAR TUBES
     圆管稳态分子流Clausing积分方程的逃逸几率的数值计算
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  probabilities
     THE B(λkq) INTENSITY PARAMETERS AND 4f-4f TRANSITION PROBABILITIES OF Na_5Eu(MO_4)_4(M =Mo, W)
     Na_5Eu(MO_4)_4(M=Mo,W)的B(λkq)强度参数和跃迁几率
短句来源
     Radiative transition probabilities for Ca~(17+) and Mn~(22+)
     Ca~(17+)和Mn~(22+)的辐射跃迁几率
短句来源
     Radiative transition probabilities of Sc~(18+) and Ti~(19+)
     Sc~(18+)和Ti~(19+)的辐射跃迁几率
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     vg9/2-1 based on the analysis of the B(M1) and B(E2) transition probabilities.
     vg9/2-1的约化跃迁几率B(E2)和B(M1)研究A≈100核区可能的手征双重带.
     Energy levels and transition probabilities of the 3s~(21)S_0-3s3p~1P_1(Z=15~103) transitions for Mg like ions
     类镁离子3s~(21)S_0-3s3p~1P_1(Z=15~103)光谱跃迁的能级和跃迁几率的相对论多组态计算
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  decay probability
     Energy level, wavefunction and radiative decay probability of Li like C are computed by using CI code CIV3, and the comparisons with those by using multi configuration Dirac Fock code MCDF are made.
     用组态相互作用程序CIV3计算了类锂碳离子能级、波函数和跃迁几率,并与相对论多组态DiracFock程序MCDF的计算结果进行了比较。
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  “几率”译为未确定词的双语例句
     QUASI-INVARIANT MEASURES ON R~∞
     R~∞上的几率测度的拟不变性
短句来源
     ON PROBLEMS OF CALCULATING TRANSMISSIBILITY α
     关于计算传输几率α的一些问题
短句来源
     OCCUPATION RENORMALIZED HARTREE-FOCK APPROXIMATION IN LIPKIN MODEL
     占有几率重整化Hartree-Fock近似的Lipkin模型
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     Study on The Molecular Dynamical Character and Probabilite of Desorption
     脱附的分子动态特征和几率分布研究
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     Effects of Squeezed Light on Photon NumberProbability Distribution and Sub-Poisson Distribution.
     级联三能级Jaynes-Cummings模型中压缩光对光子数几率分布与亚泊松分布的影响
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  probability
Assuming that the surface contains two elliptic fibrations that are invariant by non-periodic automorphisms, we give the classification of invariant probability measures.
      
Let Θ denote an involution for a simply connected compact Lie group U, let K denote the fixed point set, and let μ denote the U-invariant probability measure on U/K.
      
To that end we generalize the method given in [1] to include Fourier transforms f of probability measures on R and a certain generalized function h, and we show that the numbers KS, MS are assumed as |f(u)|, Mh for certain allowed f,h.
      
Analytic and asymptotic properties of non-symmetric Linnik's probability densities
      
The function, is a characteristic function of a probability distribution iff.
      
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  probabilities
A family of authentication codes with arbitration are constructed over projective spaces, the parameters and the probabilities of deceptions of the codes are also computed.
      
The probabilities of the following events are first discussed in this paper: the insurance company survives to any fixed time k and the surplus at time k equals x≥1.
      
The formulas for calculating such probabilities are deduced through analytical and probabilistic arguments respectively.
      
Finally, other probability laws relating to risk are determined based on the probabilities mentioned above.
      
A family of authentication codes with arbitration is constructed from unitary geometry, the parameters and the probabilities of deceptions of the codes are also computed.
      
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  decay probability
New Experimental Data on the Influence of Non-Nuclear Factors on the Radioactive Decay Probability
      
New experimental data are presented on the influence of various non-nuclear factors on the radioactive decay probability λ.
      
Also discussed are so-called interference corrections to the unperturbed decay probability, which cannot in principle be studied by the methods of perturbation theory.
      
The decay probability and amplitude in an external electromagnetic field exceed the decay probability and amplitude in vacuum even for values of the invariant parameter greater than the small quantity ma/me.
      
The relative decay probability B(φ → ηγ) = (1.259 ± 0.030 ± 0.059)% in the decay channel η → π+π-π0 has been measured in an experiment using a spherical neutral detector in the VEPP-2M electron-positron storage ring.
      
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在这篇文章中,我们利用了不可约张量算符可以表示为立体球谐函数的特性,利用了威格勒(E.P.Wigner)-拉卡(G.Racah)的代数规则以及转动群的表象的某些特性;我们求出了任意次禁戒跃迁的β-中微子角关联和β-γ角关联的公式。在这个计算里面,我们还计算了原子核的库伦场对于它所放出的β-粒子的影响以及五种相互作用的混合型。 在第二节中,我们首先把β-衰变理论中常用的五种相互作用所包含的16个狄喇克(Dirac)的4×4的矩阵各写成2×2矩阵的直接乘积,并且利用了这些矩阵的转换性质用一个公式把代表着五种不同相互作用的矩阵表示出来。在本节中,我们给出电子、中微子波函数的展开式。在第三节中,我们用和时间相关的微扰理论计算了在库伦场影响下发生β-衰变的几率,证明电子的波函数虽然含有外射波和内射波,但跃迁几率却仅由外射波所引起。在第四节中,我们利用转动群的表象,利用直角坐标中不可约张量算符可以写成立体球谐函数这一性质,而求出了五种相互作用混合时任何次禁戒跃迁的β-中微子角关联的公式。在第五节中,我们把上述β-中微子角关联的公式对于电子和中微子的立体角积分之后,我们便求出跟葛鲁林(E.Greul...

在这篇文章中,我们利用了不可约张量算符可以表示为立体球谐函数的特性,利用了威格勒(E.P.Wigner)-拉卡(G.Racah)的代数规则以及转动群的表象的某些特性;我们求出了任意次禁戒跃迁的β-中微子角关联和β-γ角关联的公式。在这个计算里面,我们还计算了原子核的库伦场对于它所放出的β-粒子的影响以及五种相互作用的混合型。 在第二节中,我们首先把β-衰变理论中常用的五种相互作用所包含的16个狄喇克(Dirac)的4×4的矩阵各写成2×2矩阵的直接乘积,并且利用了这些矩阵的转换性质用一个公式把代表着五种不同相互作用的矩阵表示出来。在本节中,我们给出电子、中微子波函数的展开式。在第三节中,我们用和时间相关的微扰理论计算了在库伦场影响下发生β-衰变的几率,证明电子的波函数虽然含有外射波和内射波,但跃迁几率却仅由外射波所引起。在第四节中,我们利用转动群的表象,利用直角坐标中不可约张量算符可以写成立体球谐函数这一性质,而求出了五种相互作用混合时任何次禁戒跃迁的β-中微子角关联的公式。在第五节中,我们把上述β-中微子角关联的公式对于电子和中微子的立体角积分之后,我们便求出跟葛鲁林(E.Greuling)和伯塞(D.L.Pursey)的结果一样的β-能谱因子的公式。在第六节中,我们将中微子运动方向、自?

For studying the mechanism of disorder to order transformation in asubstitutional alloy, we have measured the isothermal transformation curves ofCu_3Au by electric method. One of the isothermal resistance change curve iscompared with the isothermal curve obtained by means of X-ray method atthe same temperature and using the same specimen. It is shown that withinthe limit of experimental error, Δρ/Δρ_?=V_t/Vwhere Δρ is the change of resistivity of the sample when it is annealed at aconstant temperature during...

For studying the mechanism of disorder to order transformation in asubstitutional alloy, we have measured the isothermal transformation curves ofCu_3Au by electric method. One of the isothermal resistance change curve iscompared with the isothermal curve obtained by means of X-ray method atthe same temperature and using the same specimen. It is shown that withinthe limit of experimental error, Δρ/Δρ_?=V_t/Vwhere Δρ is the change of resistivity of the sample when it is annealed at aconstant temperature during a time interval t, while Δρ_? is the change ofresistivity when the time of annealing is infinitely long. V_t is the volume oftransformed regions, while V is the effective volume of the experimentalsample. The isothermal resistivity change curves obeys the equation Δρ/Δρ_?=1-e~(-at~r)where α and γ are two constants. The experiment shows that during most oftime γ is nearly 1. It is greater then 1 at the beginning of transformation,especially when the temperature is low, it approximas to 4. It is less than1 when it nears the end of transformation. These results show that it is only at the very beginning of the transfor-mation, that nucleation and growth can proceed rather freely. Owing to thevery dense population of nuclei, the ordered domains may meet quite early,hence during the most part of time, ordering or the growth of ordered domain, is mainly by means of collapsing antiphase domains to form larger homophasedomains. In order to explain the presence of maximum rate of transformation at atemperature of 372℃ below the critical temperature, it is assumed that atomschange their positions mainly by exchange their positions with vacancies. Usingthis mechanism, it is shown that the probability per unit time of an atom tochange from its disordered position to an ordered position is:α=β′(T_C-T/T)e-E_1/KTHere β′ is a constant which is independent of temperature, E_1 is the activa-tion energy for an atom to change its position with a vacancy. It is shownthat the activition energy is reled to the critical temperature and the maximumspeed temperature by the relation E_1=KT_C/(T_C/T_M-1)where T_M is the maximum speed temperature. From this relation the activationenergy of ordering is calculated to be 2.26 ev. which is rather reasonable incompare with the known data of activation energy of 2.1 ev. of self diffisionof copper.

为研究代位合金中有序化的机构起见,用电阻法测定Cu_3Au在柯诺库夫点以下,300℃以上6个温度的恒温有序化曲线,将同一温度的恒温曲线和X光超点阵线法所得的恒温曲线比较,证明电阻的改变的分数是和转变的休积的分数相等的。就是说△ρ/△ρ_∞=V_t/V其中△ρ,△ρ_∞分别为电阻率改变的瞬时值和平衡值,V_t和V分别为已经转变的体积和样品的体积。各恒温转变曲线一般遵守△ρ/△ρ_∞=1-e~(at~r)的关系。在转变过程中,大部分区域γ接近等於1。转变慢的曲线开始时期γ大於1,甚至接近4。在接近平衡区域,γ小於1。这些结果表示有序化自由成核成是的时期不大,祗有开始时期。由於核很多,有序畴很早就相碰到,所以大部分时间是反相有序畴相兼并而扩大的过程。原子从无序位置移到有序位置通过晶体点阵位置上存在着的孔穴和原子换位而实现。由於这种换位机构,一个原子在单位时间内,从无序变为有序的几率为α=β′(T_c-T/T)_e-E_1/KT 其中β′是一个与温度无关的常数,E_1是原子落到孔穴中所需克服的位垒。从此可以说明在临界点以下有一个温度转变最快。那个温度T_M和激活能E_1有以下关系: E_1=KT_c/T_...

为研究代位合金中有序化的机构起见,用电阻法测定Cu_3Au在柯诺库夫点以下,300℃以上6个温度的恒温有序化曲线,将同一温度的恒温曲线和X光超点阵线法所得的恒温曲线比较,证明电阻的改变的分数是和转变的休积的分数相等的。就是说△ρ/△ρ_∞=V_t/V其中△ρ,△ρ_∞分别为电阻率改变的瞬时值和平衡值,V_t和V分别为已经转变的体积和样品的体积。各恒温转变曲线一般遵守△ρ/△ρ_∞=1-e~(at~r)的关系。在转变过程中,大部分区域γ接近等於1。转变慢的曲线开始时期γ大於1,甚至接近4。在接近平衡区域,γ小於1。这些结果表示有序化自由成核成是的时期不大,祗有开始时期。由於核很多,有序畴很早就相碰到,所以大部分时间是反相有序畴相兼并而扩大的过程。原子从无序位置移到有序位置通过晶体点阵位置上存在着的孔穴和原子换位而实现。由於这种换位机构,一个原子在单位时间内,从无序变为有序的几率为α=β′(T_c-T/T)_e-E_1/KT 其中β′是一个与温度无关的常数,E_1是原子落到孔穴中所需克服的位垒。从此可以说明在临界点以下有一个温度转变最快。那个温度T_M和激活能E_1有以下关系: E_1=KT_c/T_c/T_M-1 Cu_3Au的T_M为372℃。从此式得激活能为2.26ev。这个数值和铜的自扩散激活能2.1ev.很接近,因之结果是很合理的。

Internal friction in hardened low-carbon nickel steel was measured with a torsion pendulum and an internal friction peak was observed around 155℃ with a frequency of vibration of about 2 cycles per second. The condition for the appearance of this internal friction peak is that the steel specimens contain martensite, alloying element and carbon. This internal friction peak has also been observed in chromium steel and chromium-nickel steel under suitable conditions. Systematic observations were made with steel...

Internal friction in hardened low-carbon nickel steel was measured with a torsion pendulum and an internal friction peak was observed around 155℃ with a frequency of vibration of about 2 cycles per second. The condition for the appearance of this internal friction peak is that the steel specimens contain martensite, alloying element and carbon. This internal friction peak has also been observed in chromium steel and chromium-nickel steel under suitable conditions. Systematic observations were made with steel specimens containing 29.7% Ni, and the height of internal friction peak was found to be proportional to the carbon content in the specimen. The experimental results mentioned above show that the new internal friction peak is associated with the stress-induced micro-diffusion of carbon in low-carbon alloy martensite.

用扭摆测量淬硬低碳镍合金钢中的内耗,当振动频率约为每秒2周时,在155℃附近有一个内耗峰出现。这个内耗峰的出现条件是:钢中必须含有马氏体、合金元素和碳。在适当的条件下,铬钢和铬镍钢中也曾观察到这个内耗峰。用含镍29.7%的钢作了系统试验,观察到内耗峰高度与试样中的含碳量成正比。内耗峰的高度由于在较高温度(165℃以上)的回火处理而不断降低。由内耗测量所测得的激活能是25,000卡/克分子。以上的实验结果指出,所观测到的155℃新内耗峰是由于碳在合金马氏体中的应力感生微扩散所引起来的。 提出了一个产生内耗峰的初步模型。假定碳在四角马氏体中是处于00(1/2)型的间隙位置。合金元素原子的存在引起晶体点阵中不均匀的畸变,因而应力的作用便改变了碳原子在热平衡状态下在Fe-C-Fe和B-C-Fe(B是合金元素原子)两种00(1/2)型间隙位置之间的跳动几率。这种应力感生的碳原子运动便引起内耗。用这个模型可以定性地解释所观测到的事实。关于这方面的定量研究正在进行中。

 
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