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12.375  Articles
1 of 1.239 pages  |  10  records  |  more records»
The wave field created by a pulsed point source of sound in a uniform homogeneous flow with an arbitrary value of the Mach number is theoretically studied. The aim of research is to obtain an analytical dependence of the sound field on physical parameters... see more

Electromagnetic transition radiation by coherent nonrelativistic electron bunches on different electrodynamic heterogeneities are experimentally studied in the paper. It was shown that transition radiation spectra considerably effected by rapidity of reor... see more

The paper reports a study into the initiation of detonation in pulse detonation engines. The chosen direction to resolve this issue is the use of detonation tubes with multifocal ignition. We applied two spark discharges as a source of ignition, which ign... see more

The article is devoted to development of the checking means of the Ukrainian Air Force aviation equipment technical condition for providing the aviation equipment operating beyond the periods of service bounds determined by producer. The approach to infor... see more

We consider linear and nonlinear models of business behavior under external pulse investments to basic production assets of enterprises.In the article used methods and models of decision making, mathematical models of the dynamics, evolutionary models wit... see more

This paper presents a study of operating characteristics of steel 40X10C2M after treatment it of high-energy plasma pulses. The steel is used to manufacture the elements of ships' power plants. For pulsed plasma treatment of steel samples, we used an elec... see more

Multi-level autonomous voltage converters are increasingly used in industry, specifically: in wind and solar energy generation, high-voltage substations, in industrial and traction electric drives. In comparison with two-level inverters, multilevel invert... see more

Pulse width modulation (PWM) is used to generate pulses with variable duty cycle rate. The rapid rising and falling edges of PWM signal minimises the switching transition time and the associated switching losses. This paper presents a DC motor speed contr... see more

It is considered the transition radiation when the charged particle crosses the boundary of plasma medium, in the cases of uniform motion and the motion, which consists of two parts of uniform motion, with two running across the boundary. The solutio... see more

1 of 1.239 pages  |  10  records  |  more records»