scholarly journals Уширение и сдвиг линий основной колебательно-вращательной полосы молекул фтористого водорода молекулами SF-=SUB=-6-=/SUB=- и H-=SUB=-2-=/SUB=-

2021 ◽  
Vol 129 (1) ◽  
pp. 5
Author(s):  
В.Я. Агроскин ◽  
Б.Г. Бравый ◽  
Г.К. Васильев ◽  
В.И. Гурьев ◽  
С.А. Каштанов ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Hydrogen Fluoride ◽  
Electric Discharge ◽  
Fundamental Band ◽  
Overtone Band ◽  
Hf Laser ◽  
Vibration Rotation ◽  
Made In

Foreign gas broadening and shift of the vibration-rotation lines in the fundamental band of hydrogen fluoride have been investigated. Using mathematical modeling of measuring the absorption of radiation of an electric discharge HF laser, the possibility of correct calculations of both broadening and shift of HF lines by foreign gases were determined. Measurements for two foreign gases (Ar and N2 for which there are literature data) were made in order to test this approach. The obtained results have been well matched with existing literature data. After that, measurements were carried out on two transitions P(7) and P(8) for SF6 (for which neither broadening nor the shift are known) and for H2 (only broadening is known for overtone band). The obtained results were compared with scarce literature data.

scholarly journals Comparison of HF and HCl Chemical Laser Parameters by using Mathematical Model

2007 ◽  
Vol 4 (1) ◽  
pp. 119-124
Author(s):  
Baghdad Science Journal
Keyword(s):  
Computer Program ◽  
Parametric Analysis ◽  
Rotational Constant ◽  
Published Data ◽  
Vibrational Quantum Number ◽  
Theoretical Comparison ◽  
Fabry Perot ◽  
Vibrational Levels ◽  
Hf Laser ◽  
Vibration Rotation

A simplified theoretical comparison of the hydrogen chloride (HCl) and hydrogen fluoride (HF) chemical lasers is presented by using computer program. The program is able to predict quantitative variations of the laser characteristics as a function of rotational and vibrational quantum number. Lasing is assumed to occur in a Fabry-Perot cavity on vibration-rotation transitions between two vibrational levels of hypothetical diatomic molecule. This study include a comprehensive parametric analysis that indicates that the large rotational constant of HF laser in comparison with HCl laser makes it relatively easy to satisfy the partial inversion criterion. The results of this computer program proved their credibility when compared with the little published data.

Mathematical Modeling of a Biomass Steam Gasifier—A Modified Equilibrium Approach

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Thomas Gröbl ◽  
Heimo Walter
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Models ◽  
Present Article ◽  
Equilibrium Model ◽  
Conversion Process ◽  
Thermochemical Conversion ◽  
Equilibrium Models ◽  
Gasification Process ◽  
Equilibrium Approach ◽  
Made In

A large potential is contributed to the energetic utilization of biomass, whereby thermochemical gasification seems to be especially interesting. In order to contribute to a better understanding of the thermochemical conversion process in the gasifier, mathematical models are used. An intensive effort is made in development of mathematical models describing the gasification process and a large number of models, considerably differing in their degree of simplification, and their applications are reported in literature. In the present article, a brief review of models applied, mainly focused on equilibrium models, is provided and a robust and flexible modified stoichiometric equilibrium model, for modeling a novel gasifier, is presented.

Intensities and the Fano Line Shape in the Infrared Spectrum of HD

1973 ◽  
Vol 51 (4) ◽  
pp. 389-397 ◽  
Author(s):  
A. R. W. McKellar
Keyword(s):  
Infrared Spectrum ◽  
Line Shape ◽  
Dipole Moments ◽  
Transition Dipole ◽  
Fundamental Band ◽  
Overtone Band ◽  
Transition Dipole Moments ◽  
Free Molecules

The spectrum of gaseous HD at a temperature of 77 K and densities from 1 to 60 amagat has been studied in the regions of the fundamental and first overtone bands. The 1–0 band consists of two components: (1) a collision-induced part, made up of broad Q and S transitions arising from collisions between molecules, and (2) a dipole-allowed part, made up of much sharper P and R transitions due to free molecules. The collision-induced 2–0 band was too weak to be observed in these experiments, but the first overtone R(0) transition was studied. The collision-induced fundamental band shows the expected similarity to the previously observed spectra of H2 and D2. A pronounced asymmetry in the fundamental band P and R transitions may be ascribed to a resonant interference with the underlying collision-induced continuum. Measurements of the intensities of the appropriate R(0) lines yield the following transition dipole moments: (0.49 ± 0.02) × 10−4 D for the fundamental, and (0.21 ± 0.02) × 10−4 D for the first overtone band.

Room-temperature Fe2+: ZnS single crystal laser pumped by an electric-discharge HF laser

2016 ◽  
Vol 46 (9) ◽  
pp. 769-771 ◽  
Author(s):  
S D Velikanov ◽  
A E Dormidonov ◽  
N A Zaretsky ◽  
S Yu Kazantsev ◽  
V I Kozlovsky ◽  
...  
Keyword(s):  
Single Crystal ◽  
Electric Discharge ◽  
Room Temperature ◽  
Crystal Laser ◽  
Hf Laser

Vibration–Rotation Interaction in the Fundamental Band of HF†

1964 ◽  
Vol 54 (5) ◽  
pp. 715_1 ◽  
Author(s):  
L. F. Eldreth ◽  
W. F. Herget ◽  
R. J. Lovell
Keyword(s):  
Fundamental Band ◽  
Vibration Rotation

The influence of vibrational excitation on the burning voltage of a pulsed electric discharge in HF laser working media

2006 ◽  
Vol 82 (3) ◽  
pp. 455-461 ◽  
Author(s):  
A.A. Belevtsev ◽  
K.N. Firsov ◽  
S.Yu. Kazantsev ◽  
I.G. Kononov
Keyword(s):  
Electric Discharge ◽  
Vibrational Excitation ◽  
Hf Laser ◽  
Working Media ◽  
Burning Voltage

scholarly journals Construction and Use of the Regional Input-Output Model with Environmental and Economic Development Blocks

2020 ◽  
Vol 20 (3) ◽  
pp. 27-46
Author(s):  
Аlexander О. Baranov ◽  
Victor N. Pavlov ◽  
Tatiana O. Tagaeva ◽  
Yuliia M. Slepenkova
Keyword(s):  
Mathematical Modeling ◽  
Environmental Economics ◽  
Statistical Data ◽  
Environmental Issues ◽  
Environmental Data ◽  
State University ◽  
Input Output ◽  
The 1960S ◽  
Statistical Indicators ◽  
Made In

The paper analyzes environmental-economics models developed by foreign and Russian scientists. The first attempts to combine both economic and environmental issues in mathematical modeling were made in the 1960s, with most of them been theoretical due to lack of necessary data. With the development of modeling approaches, following on Wassily Leontief’s models, an environmental block has been included into input-output models. However, most of the existing models can hardly be applied to practice due to lack of statistical data and the absence of inter-industry approach. Even today the main restricting factor for these models to be used in practice is still limited availability of information, including not only economic but also environmental data, which is especially critical for regional researches, as the number of statistical indicators for the regions is much lower than at the macro level. The article provides mathematical description of the input-output model with an environmental block. The model is developed at the Institute of Economics and Industrial Engineering of the Siberian Branch of the RAS in collaboration with the Novosibirsk State University. The model can be used for regional researches, given the input-output tables for the region is available.

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