pmo is the amplitude of the pressure wave, r is the radial distance from the center of the pipe to any point, a is the radius of the pipe, z is the distance along the pipe, ω is the radian frequency, and t is time. γom and αom are related by the following formula: γom=k2...
Wave speed can be obtained from both the distance and time graph. In calculating wavelength, the use of distance, speed, and time is found. Speed can be obtained by dividing the distance by time and speed can also be calculated by multiplying wavelength by frequency. Therefore, the wavelength...
For the case of no charges or currents, that is, j = 0 and ρ = 0, and a homogeneous medium, Maxwell equations and the given identities can be applied in conjunction with the vector identity (5.12)∇×∇×E=∇∇·E−∇2E to obtain wave equations of the form (Born and Wo...
Our study investigated an algorithm for a second-order ordinary differential equation for the frequency-domain Green’s function of free-surface waves in water of infinite depth. A power-series method is introduced if the wave frequency ω<1; otherwise, if ω≥1, then the trigonometrically fitte...
Since the widespread use of radar in World War II, engineers have grappled with the problem of calculating the radar echo characteristics of a wide variety... EF Knott - 《Proceedings of the IEEE》 被引量: 209发表: 1985年 Computational high frequency waves through curved interfaces via the ...
Sample Problem # 1: The wavelength along a rope is 3.5 m and the crests travel 11 m in 2.9 s. What is the frequency of the waves? Answer: f = 1.1 Hz Sample Problem # 2 The period of a wave from the radio is 8.3 x 107. If the speed of the wave in the air was 3.5 x 10...
We propose a regularization approach by means of the orthogonal MRA generating the Meyer wavelet. The main reason for this is the fact that the Fourier transform of Meyer wavelet is known to be compactly supported. This means that they can be used to prevent high frequency noise from ...
It is an empirical relation describing the viscous and inertial loads on a vertical slender cylinder subjected to small amplitude, high frequency oscillations. This implies the slender body does not modify the incident wave characteristics and hence diffraction loads are not considered. Whilst it has ...
However, a reduced set of equations of motion can be obtained by integrating out certain degrees of freedom, much in the same way as the single-mode model for current-driven spin-wave excitations described in the previous sections. One useful approach involves the assumption that the dynamics ...
Both the numerical schemes are validated by dimensionless frequency responses to a heterogeneous alluvial valley with the velocity perturbed randomly in the range of ca 5-20 %. The schemes are applied to wave propagation simulation in a heterogeneous multilayered model by calculating synthetic ...