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phase of wave
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  “phase of wave”译为未确定词的双语例句
     The simulation says this phenomenon is due to the reflection of dynamic stress. If reflection occurs at the free surface, the phase of wave changes 180 degree, that is, the half-wave lost. The half-wave lost means compress wave turn into tensile one and vice versa.
     模拟表明这种现象是由于动态应力波的反射造成的,应力波在自由表面的反射后,相位改变了180度,发生了半波损失,压缩性冲击波变成了拉伸性冲击波,因而导致了岩体的错动。
短句来源
     We shown that the Hamiltonian of the harmonic oscillator with time-dependent frequency and boundary conditions is related to the effective Harmiltonian of a particle in an infinite potential well with a moving wall by a time-dependent gauge transformation. Furthermore, we calculated the non-adiabatic Berry phase of wave function of the harmonic oscillator with time-dependent frequency and boundary conditions by using the geometric concepts such as the geometric distance and geometric length of the curve.
     我们表明具有时间依赖的频率和边界条件的谐振子的哈密顿算符同具有一运动阱壁的无限深势阱内粒子的有效哈密顿算符由一含时规范变换相关联,进而我们利用几何距离和曲线的几何长度概念计算该体系量子态的非绝热Berrg相位。
短句来源
     During the decaying stage, the phase of wave packets is vertical at all levels.
     在波包衰减阶段,其位相在整个对流层都是近于垂直的。
短句来源
     A semi-infinite slab made of the planar LH metamaterial is simulated and the phase velocity is respectively extracted from the transmission and reflection data at normal incidence and the phase of wave front, results show the LH metamaterials studied exhibit backward wave (BW) properties in the frequency range of interest.
     基于电磁波由自由空间入射半无限大异向介质平板的传输和反射数据,计算出了电波在其中传播时的相速随频率的变化曲线,结果表明所讨论的异向介质确实在预想的频段上表现出后向波特性; 同时利用相位观察法进一步验证了上述的后向波特性,从而肯定了异向介质的存在.
短句来源
  相似匹配句对
     Phase C is a b. c. c.
     C相为残余的Y_2O_3相。
短句来源
     the phase of the mortgage ;
     楼花按揭的阶段性;
短句来源
     water phase.
     以水为反应介质.
短句来源
     Phase Analysis of Andalusite
     桑坪红柱石物相分析方法研究
短句来源
     EMOTIONAL WAVE
     情感的风涛——读秀侠
短句来源
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  phase of wave
The phase of wave minimum has decreased from 0.P80 to 0.P25, the wave amplitude has varied between 0.m06 and 0.m12, and the mean light level has fluctuated between 0.94 and 0.99.
      
On the phase of wave function and the gauge invariance in norelativistic quantum mechanics
      
The specific effect of lindane on this phase of wave propagation could agree with this hypothesis.
      
The phase of wave almost keeps oscillating in an identical way.
      


In this paper, the results on wave propagation in nonuniform media which were studied by Lighthill, Whitham and some others are analysed. It is found that when the phase of wave is expressed as that of near plane wave i. e. θ=k (X, T)x-ω(k(X, T)X, T)t where X, T are ex, et respectively, e is a small parameter, k, a> are local wave number and frequency, then we can get . This means that the phase does not satisfy the principle ofcontinuity as proposed by them. With this result, it is pointed...

In this paper, the results on wave propagation in nonuniform media which were studied by Lighthill, Whitham and some others are analysed. It is found that when the phase of wave is expressed as that of near plane wave i. e. θ=k (X, T)x-ω(k(X, T)X, T)t where X, T are ex, et respectively, e is a small parameter, k, a> are local wave number and frequency, then we can get . This means that the phase does not satisfy the principle ofcontinuity as proposed by them. With this result, it is pointed out that the wave number is always constant along the rays while the frequency is variable. This is different from that obtained by Lighthill and others. The causes of these differences are discussed in the paper.

本文中,对Lighthill等人有关非均匀介质中波动性质的研究进行了分析。在接近平面波的近似情况,位相并不满足他们提出的连续性原理,而频率随时间的变化成为位相变化的外源。同时沿群速线方向,波数总是守恒的,无论介质均匀与否,但频率在群速方向上总是改变的。这些结果和Lighthill等人的结果是有所差异的。在本文中,除给出了具体的表达式外,并对引起差异的原因作了分析,认为本文结果较为合理。

This paper reports the results of the study on the gross electrical response of the visual system of An.sinensis with micropipette electrode.The normal electroretinogram (ERG) of An.sinensis is diphasic, including three main components, i.e.the positive (deflected downwards) on-effect, the negative off-effect and the positive slow sustained wave.The phase of the response in the optic lobe is opposite to ERG.From the tissues outside the optic lobe into the optic lobe and compound eye, the phase of wave...

This paper reports the results of the study on the gross electrical response of the visual system of An.sinensis with micropipette electrode.The normal electroretinogram (ERG) of An.sinensis is diphasic, including three main components, i.e.the positive (deflected downwards) on-effect, the negative off-effect and the positive slow sustained wave.The phase of the response in the optic lobe is opposite to ERG.From the tissues outside the optic lobe into the optic lobe and compound eye, the phase of wave changes twice.It shows that the strength of stimulation, light and dark adaptation condition, and the effect of ether and suffocation may affect the response of the visual system of the mosquito.

用玻璃微电极引导出中华按蚊正常ERG为双相电位,有三种主要成分:正相(向下偏曲)给反应、负相撤反应和两者间的正相持续性慢电位;视叶内电位极性与ERo相反。在电极插入过程中,电位有二次反极。实验表明,刺激光强度、背景明暗状态及乙醚、窒息等对其光电反应均有明显的影响。

rom the quasi-geostrophic two-layer model, the quasi-resonance occurs possibly for two cases:(1) pure barotropic waves 1 (2) two baroclinic waves and one barotropic wave.For case(2), it is the analytic solution of triad amplitude of quasi-resonance and approximate expression for the variation period of wave energy which are found. Both the approximate expression and numerical calculation indicate that for the baroclinic atmosphere the period of energy variaton approaches the period 2 corresponding to the quasi-resonance...

rom the quasi-geostrophic two-layer model, the quasi-resonance occurs possibly for two cases:(1) pure barotropic waves 1 (2) two baroclinic waves and one barotropic wave.For case(2), it is the analytic solution of triad amplitude of quasi-resonance and approximate expression for the variation period of wave energy which are found. Both the approximate expression and numerical calculation indicate that for the baroclinic atmosphere the period of energy variaton approaches the period 2 corresponding to the quasi-resonance frequency mismatch △ω itself more easily than for the barotropic atmosphere. It is pointed from physics that there is a feedback mechanism between the phase of wave and wave amplitude,the slowly varying phase difference between the barotropic wave and the baroclinic waves causes the transformation of the kinetic energy and the available potential energy, and formes the low-frequency oscillation alternately strengthening and weakening the barotropic wave and the baroclinic wave,which oscillation period is the same as above approximate formula. When △ω ̄(0.1-0. 02)o (ωj),averaged energy period is 12-43 days and when △ω=0,it is 366 days. Therefore, the occurrence of frequency mismatch △ω is also probably a new important mechanism for the formation of middle and high latitude low-frequency in the baroclinic atmosphere.

从准地转两层模式出发,可能产生两种情况准共振:(1)纯正压波;(2)两个斜压波和一个正压波。本文对(2)求得准共振三波振幅的解析解和波能量变化周期的近似式。此近似式和数值计算结果两者都表明,斜压情况能量变化周期比正压情况更容易趋于准共振频率偏离Δω自身周期,从物理上指出,波的位相与波振幅之间存在着一个反馈机制,由正压波与斜压波之间的慢变相差引起的动能与有效位能的互相转换,形成了正压波和斜压波交替增强和减弱的低频振荡,其振荡周期与上述近似式一致。当Δω~(0.1-0.02)。(ωj)时,平均能量周期为12-43d,而当Δω=0时,平均周期为366d.因此,频率偏离Δω出现仍可能是产生料压大气中高纬低频振荡的一种新的重要机制。

 
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