Zobrazeno 1 - 10
of 49
pro vyhledávání: '"V. V. Nevdakh"'
Autor:
V. V. Nevdakh
Publikováno v:
Наука и техника, Vol 21, Iss 3, Pp 222-228 (2022)
The description of a plane traveling electromagnetic wave existing in the physical literature by identical solutions of wave equations for the strengths of electric and magnetic fields is physically incorrect, since such solutions contradict the phys
Externí odkaz:
https://doaj.org/article/c003d0008b3a44cab33059c6561bee35
Autor:
V. V. Nevdakh
Publikováno v:
Наука и техника, Vol 20, Iss 2, Pp 161-167 (2021)
In accordance with the energy conservation law, the total energy of a closed physical system must remain constant at any moment of time. The energy of a traveling elastic wave consists of the kinetic energy in the oscillating particles of the medium
Externí odkaz:
https://doaj.org/article/c4e2eb9b00054dfc97bb0c9905136af4
Autor:
V. V. Nevdakh
Publikováno v:
Pribory i Metody Izmerenij, Vol 6, Iss 2, Pp 239-248 (2015)
Computer simulation of the initial fire stages in closed compartment with the volume of ≈ 60 m3 and with a burner on a floor and 2 m above floor have been carried using FDS software. Fires with different t 2 –power low heat release rates have bee
Externí odkaz:
https://doaj.org/article/f32bf8d5c51b421f8a1fc1fc97782cfd
Autor:
V. V. Nevdakh
Publikováno v:
Наука и техника, Vol 0, Iss 4, Pp 3-12 (2015)
Computer simulation of the initial fire stage dynamics with various growth rate have been carried out with the help of FDS software. In case of a quick fire 1055 kW heat liberation has been reached in accordance with quadratic law within 100 seconds,
Externí odkaz:
https://doaj.org/article/42dbd8cd40bf45428db5de75910b917a
Publikováno v:
Pribory i Metody Izmerenij, Vol 0, Iss 1, Pp 78-84 (2015)
The unsaturated absorption coefficients in pure CO2 at the pressures 1 and 100 Torr and in CO2:N2 and CO2:He binary gas mixtures at the pressure 100 Torr are measured in the 296-700K temperature range by a frequency-stabilized tunable CO2 laser. The
Externí odkaz:
https://doaj.org/article/adc7c5586ff2425b9e9937ddfa0a8b0e
Publikováno v:
Pribory i Metody Izmerenij, Vol 0, Iss 2, Pp 63-66 (2015)
The technique of simultaneous determination of the spontaneous emission probabilities Аmn and the collision self-broadening coefficients γmn of the СО2 spectral lines is presented. The dependence of the absorption coefficient on the gas pressure,
Externí odkaz:
https://doaj.org/article/084df6d7341b4e81b1b8371d154b8b48
Publikováno v:
Наука и техника, Vol 0, Iss 3, Pp 28-34 (2014)
A computer simulation of the initial stage of stationary flame fire in an indoor area has been made with the help of FDS software (version 5). It has been shown that stationary and non-stationary heat release stages are present in a stationary fire a
Externí odkaz:
https://doaj.org/article/d58f09d961cb4c7aaf0ba5e64f06d0be
Autor:
V. V. Nevdakh
Publikováno v:
Наука и техника, Vol 0, Iss 4, Pp 32-37 (2013)
The paper presents a kinetic model of CW electric-discharge CO2-laser with fast flow. Expressions linking a non-saturated gain ratio, saturation intensity and output power of the fast-flow laser with excitation rates and relaxation times of laser lev
Externí odkaz:
https://doaj.org/article/12577d33ab064c0abca79ed8ded64367
Publikováno v:
Atmospheric and Oceanic Optics. 33:229-237
Unsaturated absorption coefficients in pure CO2 and binary mixtures of CO2 with buffer gases Mj (He, Ar, Kr, Xe, N2, O2, CO, N2O, 13C16O2) were measured with a tunable CO2 laser at the central frequencies of the R(8), R(22), R(34), P(8), P(22), and P
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb722bf8a2696297ab4007a289742019
https://doi.org/10.1134/s1024856020030033
https://doi.org/10.1134/s1024856020030033
Publikováno v:
Optics and Spectroscopy. 125:1-4
Using a tunable CO2 laser, unsaturated absorption coefficients in pure CO2 and binary CO2 gas mixtures with inert gases He, Ar, Kr, and Xe in a 1 : 2 ratio at 100 Torr were measured at the central frequencies of the R(8), R(22), P(8), P(22), and P(32
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d53c81fb4b21943dfce936c3c5c546b
https://doi.org/10.1134/s0030400x18070032
https://doi.org/10.1134/s0030400x18070032