A study of three-dimensional absorbers in the field of a plane sound wave and in a diffusion field
A study of three-dimensional absorbers in the field of a plane sound wave and in a diffusion field
K.A. Velizhanina and L.A. Borisov
An analysis is given of the absorption characteristics of a three-dimensional spherical absorbei, and it is shown that the latter should have a maximum absorption. Nomograms are given from which it is possible to calculate the sound absorption coefficient with given absorber pa rameters (radius of the sphere or the edge of the cube and the im pedance of its surface)or, on the other haod, to find the parameters needed to obtain a desired absorption characteristic in the field of a plane wave and in the sound diffusion field.
Show AbstractThe most important relationships in the nonlinear thermodynamics of irreversible processes
The most important relationships in the nonlinear thermodynamics of irreversible processes
R.L. Stratonovich
On the basis of the nonlinear theory of irreversible processes previously developed, the relationships which link the diffusion coefficients of the internal thermodynamic parameters with the nonlinear terms of the phenomenological equations for their mean values are investigated. The theory is illustrated by means of examples.
Show AbstractThe scattering of fast electrons moving in a magnetic field
The scattering of fast electrons moving in a magnetic field
O.F. Dorofeev
The scattering of relativistic electrons at a spherically symmetrical force center in a uniform magnetic field is considered. It is assumed that the initial state of the electron corresponds to motion strictly along the field.
Show AbstractApplication of the root locus method for investigating linear delayed systems
Application of the root locus method for investigating linear delayed systems
G.A. Bendrikov and F.B. Konev
The main properties of the root loci of linear delayed systems are found, including the equations of the loci and formulas for the free parameter, whereby the root loci can be plotted (geometrically and analytically) and the value of the free parameter determined at any point of the locus. Examples are considered, showing how the main properties of the loci of systems of different classes may be used to find the regions of stability, the variation in the magnitude and nature of the degree of stability, the critical values of the frequency and free parameter, and the transients in the system.
Show Abstract