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.

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.

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.

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.

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.

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.