SUBSTANCE: method for determining the phase velocity of propagation of electromagnetic waves in transmission line involves modulation of a monochromatic electromagnetic wave by pulsating sequence, dividing the modulated electromagnetic wave into two coherent waves, passing these waves simultaneously through a ...
Line-Of-Sight Multiple-Input Multiple-Output Line-of-sight propagation Line-of-sight propagation Line-of-sight propagation line-of-sight reception line-of-sight transmission line-of-sight velocity Line-of-Sight Velocity Distribution line-of-sight wave ...
Analysis and numerical simulation of dynamic effect on rock under high pressure water jet The results show that the propagation velocity of stress wave is proportional to the impacting velocity of high pressure water jet. The faster the ... XH Li,H Si,DD Wang - 《International Journal of Coal...
6) propagation velocity 传播速度 1. Using two sensors set at each side of a certain long oil pipe line,we can position the spilling point with the propagation time difference of the negative pressure wave caused by spillage,which can be more exactly when considering the relation between its ...
We have mainly discussed the case of a Gauss-Bessel pulsed beam in free space, and the method is also suitable to other types of pulsed beams, for example the Airy-Bessel pulsed beam in free space or materials. This velocity and acceleration tunable straight-line propagation light bullet has...
1)propagation velocity传播速度 1.Using two sensors set at each side of a certain long oil pipe line,we can position the spilling point with the propagation time difference of the negative pressure wave caused by spillage,which can be more exactly when considering the relation between its propagat...
(pulse-front pre-deformation) with the diffraction-free (Gauss-Bessel) pulsed beam and theoretically produced a straight-line propagation light bullet in free space, whose velocity and acceleration could be freely controlled, including all cases of superluminal, subluminal, acceleration, deceleration ...
In Section 2.2.2.3 we defined the phase and group velocities of EM waves. The phase velocity is hereby defined as the propagation velocity of a certain component of an EM wave. However, light consists of a variety of wavelengths with certain phase velocities. The EM wave appears as a superp...
We study theoretically the propagation of electromagnetic waves in an infinite, isotropic, and homogenous, medium with both temporal and spatial dispersion included. We derive a partial differential equation connecting temporal and spacial dispersion to achieve negative group velocity. An exact solution of...
Sound propagation (vector and intensity) in water is a function of its velocity. And velocity is a function of water density and compressibility. As such, sound velocity is dependent upon temperature, salinity, and pressure and is normally derived expressing these three variables (Figure 2.8). Th...