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central transition
相关语句
  中心跃迁
    POPULATION INVERSION OF THE CENTRAL TRANSITION OF SPIN-3/2 NUCLEAR SYSTEMS IN POWDER SAMPLES
    粉末样品中自旋3/2核体系中心跃迁的布居数反转
短句来源
    Under the condition of finite pulse width, using a vector model and computer simulation, the present paper proposed a composite 180 pulse: 45 112. 5 45, for uniform population inversion in the central transition of spin-3/2 nuclear systems.
    在有限脉冲宽度条件下,本文利用矢量模型与计算机模拟设计了一个组合180°脉冲:45°_x112.5°_y45°_x,可以均匀地将自旋I=3/2核体系中心跃迁的布居数反转。
短句来源
    MULTIPLE EXCITATION IN THE CENTRAL TRANSITION OF HALF-INTEGER QUADRU- POLAR NUCLEI IN SOLIDS
    半整数四极体系中心跃迁的多次激发NMR谱(英文)
短句来源
    The computer simulation method of the solid powder pattern in the presence of anisotropic chemical shift effect and nuclear electric quadrupole interaction is presented. The computer program was designed for the powder pattern of the central transition of nuclei with half-integral spin. The "noise" and error in the simulation spectra as well as the spectra simulation procedure were analysed.
    文本介绍了存在各向异性化学位移效应和电四极矩相互作用时,自旋为半整数核的固体NMR中心跃迁粉末谱的计算机拟合方法,讨论了谱拟合步骤和模拟谱中的“噪声”和误差。
短句来源
    Spin-locking o f central transition in half-integer quadrupolar systems was studied. The particles which occupy the states of |-1/2> and |l/2> may form an isolated sub-system, and it obeys the spin temperature theory in rotating frame. We calculated the intensity of spin-locking signal by density operator approach.
    本文研究了半整数四极体系中心跃迁的自旋锁定,认为占据|-1/2>与|1/2>态的粒子可构成一个孤立的子体系,用密度算符理论证明了旋转坐标系自旋温度理论在这子体系中仍适用。
短句来源
更多       
  中心跃迁
    POPULATION INVERSION OF THE CENTRAL TRANSITION OF SPIN-3/2 NUCLEAR SYSTEMS IN POWDER SAMPLES
    粉末样品中自旋3/2核体系中心跃迁的布居数反转
短句来源
    Under the condition of finite pulse width, using a vector model and computer simulation, the present paper proposed a composite 180 pulse: 45 112. 5 45, for uniform population inversion in the central transition of spin-3/2 nuclear systems.
    在有限脉冲宽度条件下,本文利用矢量模型与计算机模拟设计了一个组合180°脉冲:45°_x112.5°_y45°_x,可以均匀地将自旋I=3/2核体系中心跃迁的布居数反转。
短句来源
    MULTIPLE EXCITATION IN THE CENTRAL TRANSITION OF HALF-INTEGER QUADRU- POLAR NUCLEI IN SOLIDS
    半整数四极体系中心跃迁的多次激发NMR谱(英文)
短句来源
    The computer simulation method of the solid powder pattern in the presence of anisotropic chemical shift effect and nuclear electric quadrupole interaction is presented. The computer program was designed for the powder pattern of the central transition of nuclei with half-integral spin. The "noise" and error in the simulation spectra as well as the spectra simulation procedure were analysed.
    文本介绍了存在各向异性化学位移效应和电四极矩相互作用时,自旋为半整数核的固体NMR中心跃迁粉末谱的计算机拟合方法,讨论了谱拟合步骤和模拟谱中的“噪声”和误差。
短句来源
    Spin-locking o f central transition in half-integer quadrupolar systems was studied. The particles which occupy the states of |-1/2> and |l/2> may form an isolated sub-system, and it obeys the spin temperature theory in rotating frame. We calculated the intensity of spin-locking signal by density operator approach.
    本文研究了半整数四极体系中心跃迁的自旋锁定,认为占据|-1/2>与|1/2>态的粒子可构成一个孤立的子体系,用密度算符理论证明了旋转坐标系自旋温度理论在这子体系中仍适用。
短句来源
更多       
  “central transition”译为未确定词的双语例句
    NMR ECHO SEQUENCE IN THE CENTRAL TRANSITION OF SPIN-3/2 QUADRUPOLAR SYSTEMS IN POWDERED SAMPLES
    自旋3/2粉末样品四极核中心跃迁的NMR回波序列
短句来源
    When the average rf field strength ω_c (in rad. s~(-1)) satisfies the condition ω_q/ω_e<1/5, measurement of central transition results in a line which locates at ωc/(2π);
    在梳伏脉冲的平均射频汤强度ω_e(以弧度·秒~(-1)为单位)满足ω_q/ω_e<1/5时,测量中心线所得的谱,位于频率ω_e/2π处;
短句来源
    A pulse sequence 45x°t1-90±y°t2 is proposed for the spin echo of I = 3/2 spin systems in powder samples , which is confirmed theoretically and experimentally . It can effectively refocuse the magnetization of the central transition in spin-3/2 quadrupole nuclear systems . And the numerical calculated excitation bandwidth of the echo sequence is also given .
    本文提出脉冲序列45_X~°—t_1—90_(±Y)~°—t_2,从理论和实验上证实了它能够有效地会聚粉末样品中I=3/2四极核中心跃迁的磁化矢量,并对该回波序列的激发谱宽作了数值计算。
短句来源
    The calculation of spin diffusion rate is demonstrated with two typical cases: a spin-1/2 pair and the central transition of a spin3/2 pair.
    接着以丰核环境中相互偶合的自旋-1/2系统以及自旋-3/2系统为典型列举了自旋扩散速率的计算。
短句来源
    HIGH-RESOLUTION NMR SPECTROSCOPIC STUDY ON THE CENTRAL TRANSITION OF SPIN-3/2 QUADRUPOLAR NUCLEI IN POWDERS
    粉末样品自旋3/2四极核中心跃迁的高分辨核磁共振谱
短句来源
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  central transition
Variation of relaxation timet1 with crystal orientation for the central transition of Fe3+/MgO revealed two minima that were explained as due to crossrelaxation mechanisms.
      
Data for terbium NMR (central transition) in Tb-Y alloys are presented.
      
The central transition of I=3/2 perturbed by the second order quadrupole effect is usually observed by highresolution NMR apparatus.
      
Perturbation theory for a low and numerical calculations for a high standing wave intensity give qualitative agreement with experiment and substantiate the nature of the central transition.
      
We report here a method that allows one to correlate the first-order quadrupolar spectrum with the central transition in a two-dimensional experiment.
      
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The basic procedure for the digital calculations of the po-vier pattern has been introduced. As a premise of computer simulations a mathematic formula' tion withmore synthesis and universality has been deduced. Following considerations are accepted in our program the weight treatment of the combination of absorptions of all transitions resulting in the total spectrum, the fluctuation of the quadrupole interaction gives rise to a broadening of single lines, this effect delivers different effects to the central...

The basic procedure for the digital calculations of the po-vier pattern has been introduced. As a premise of computer simulations a mathematic formula' tion withmore synthesis and universality has been deduced. Following considerations are accepted in our program the weight treatment of the combination of absorptions of all transitions resulting in the total spectrum, the fluctuation of the quadrupole interaction gives rise to a broadening of single lines, this effect delivers different effects to the central transition and satellites. It is emphasized that a set of parameters describing the resonance absorptions are obtained by an optimum fit with the all-over pattern and the coincidence of those shifting behaviours of characteristic peaks as the external field changing.

介绍粉末谱数值计算的基本手续。推导了更具综合性和普适性的数学形式,作为计算机拟谱的前提。陈述程序中的若干考虑:所有跃迁吸收合成总谱时的权重处理,四极矩作用的涨落对单线展宽有贡献,而且这种效应对中心跃迁及伴线的影响各不相同。强调一套描述共振吸收的参数获得是基于对全谱型的最佳拟合以及在场强变化情况下各特征峰移动行为的符合。

The computer simulation method of the solid powder pattern in the presence of anisotropic chemical shift effect and nuclear electric quadrupole interaction is presented. The computer program was designed for the powder pattern of the central transition of nuclei with half-integral spin. The "noise" and error in the simulation spectra as well as the spectra simulation procedure were analysed.

文本介绍了存在各向异性化学位移效应和电四极矩相互作用时,自旋为半整数核的固体NMR中心跃迁粉末谱的计算机拟合方法,讨论了谱拟合步骤和模拟谱中的“噪声”和误差。

The comb-pulse response of a system of half-integer quadruplar nuclei depends on the quadrupolar coupling constant ω_q. When the average rf field strength ω_c (in rad. s~(-1)) satisfies the condition ω_q/ω_e<1/5, measurement of central transition results in a line which locates at ωc/(2π); and when ωq/ωc > 2.0, the resul tant line appears at 2ω_c/(2π). Theoretical calculations are in agreement with experiments.

半整数四极核的中心跃迁对梳状脉冲序列的响应随四极常数ω_q而变化。在梳伏脉冲的平均射频汤强度ω_e(以弧度·秒~(-1)为单位)满足ω_q/ω_e<1/5时,测量中心线所得的谱,位于频率ω_e/2π处;而当ω_q/ω_e>2时,所得的谱线在2ω_e/2π处,理论计算与实验结果是一致的。本文得到的结论表明,梳状脉冲序列将可能成为研究这些体系中的相变,以及分子内部运动过程的有效手段。

 
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