Search results for: L. G. Gasanova

Items from 1 to 14 out of 14 results

article

Structural and Optical Properties of Ga₂Se₃ Crystals by Spectroscopic Ellipsometry

I. Guler, M. Isik, N. M. Gasanly, L. G. Gasanova, more

Journal of Electronic Materials > 2019 > 48 > 4 > 2418-2422

Optical and crystalline structure properties of Ga₂Se₃ crystals were analyzed utilizing ellipsometry and x-ray diffraction (XRD) experiments, respectively. Components of the complex dielectric function (ε = ε₁ + iε₂) and refractive index (N = n + ik) of Ga₂Se₃ crystals were spectrally plotted from ellipsometric measurements conducted from 1.2 eV to 6.2 eV at 300 K. From the analyses of second-energy...

article

Effect of Laser Radiation on InSe and GaSe Thin Films Grown via Laser Sublimation and Chemical Deposition

V. M. Salmanov, A. G. Guseinov, R. M. Mamedov, A. A. Salmanova, more

Russian Journal of Physical Chemistry A > 2018 > 92 > 9 > 1790-1793

The formation of indium and gallium monoselenide thin films under the action of a powerful Nd : YAG laser is described. The use of laser radiation allows the production of substances of high purity and with accurately controlled composition. After GaSe nanoparticles are irradiated with high power laser, their structures change, clusters appear, and the size of nanoparticles falls from 93–75 to 10–15...

article

Effect of diamond blend on the gas-separation properties of composite membranes

S. V. Kryuchkova, Yu. V. Kostina, M. Yu. Yablokova, L. G. Gasanova, more

Russian Journal of Physical Chemistry A > 2017 > 91 > 10 > 1833-1838

The morphological structure and gas transport properties of polyimide- and polyamide-imidebased rigid-chain polymers containing a fine carbon filler (a diamond blend) are studied. Gas transport properties are measured, and the effect exerted on these properties by intermolecular interaction between the functional groups of polymer chains and the fine filler is analyzed.

article

Polymer morphology and gas transport properties in relation to their chemical structure

S. V. Kryuchkova, M. Yu. Yablokova, A. Yu. Alentiev, L. G. Gasanova, more

Moscow University Chemistry Bulletin > 2017 > 72 > 3 > 120-127

The morphology, supramolecular structure, and gas transport properties of thin membranes of polymers with different chemical structure are studied. The relationship between the supramolecular structure of the polymers and their morphology and gas transport properties is revealed. The polymers studied represent low-permeability materials and exhibit a high degree of selectivity for different gas pairs.

article

Features of laser-induced luminescence and photoconductivity of layered Cu₃In₅S₉ crystals

A. G. Guseinov, A. G. Kyazym-zade, V. M. Salmanov, R. M. Mamedov, more

Optics and Spectroscopy > 2016 > 121 > 6 > 897-900

Luminescence and photoconductivity of layered Cu₃In₅S₉ crystals at high levels of optical excitation are studied experimentally. A pulsed nanosecond Nd:YAG laser with built-in second and third harmonic generators to generate 1064-, 532-, and 355-nm radiation is used as a light source. It is found that the photoluminescence spectra exhibit two emission bands due to zone–acceptor level and impurity...

article

An investigation of the dynamics of a wind power unit equipped with synchronous generators with permanent magnets

R. I. Mustafaev, L. G. Gasanova

Russian Electrical Engineering > 2015 > 86 > 5 > 258-263

Sudden gusts of wind exert significant forces on the blades of a wind power unit (WPU), creating a torque jump on the shaft of the unit. When operating a wind power unit on the grid, such a regime threatens to distort the dynamic stability of the system. A change in wind speed that is close to real fluctograms, structure of the wind velocity model that allows one to set the difference speed value...

article

Gas separation properties of Extem® polyetherimide containing finely divided carbon filler

S. V. Kryuchkova, M. Yu. Yablokova, L. G. Gasanova, A. V. Kepman, more

Petroleum Chemistry > 2015 > 55 > 9 > 730-737

Morphology and gas separation properties of composites based on Extem® polyetherimide containing finely divided filler have been analyzed in a wide concentration range. Diamond blend having a high surface area with different functional groups has been selected as the fine filler. Physicochemical, structural, and gas transport characteristics of film samples obtained by dry and dry–wet spinning have...

article

Composite membranes containing metal-organic polymers: Morphology and gas transport properties

S. N. Klyamkin, M. Yu. Yablokova, L. G. Gasanova, A. V. Kepman, more

Petroleum Chemistry > 2014 > 54 > 7 > 482-490

Metal-organic framework compounds used in gas separation membranes based on polyimides with different chemical structures have been surveyed. According to analysis of published data, a metal-organic framework compound composed of MIL-101 and two polyimides with different chemical structures has been selected. Samples of gas separation membranes containing the additive in an amount of 2.5–20 wt % have...

article

Optical nonlinearities in GaSe and InSe crystals upon laser excitation

A. G. Kyazym-zade, V. M. Salmanov, A. G. Guseinov, L. G. Gasanova, more

Optics and Spectroscopy > 2014 > 116 > 4 > 595-598

The nonlinear absorption of light and its temporal evolution in the vicinity of exciton resonance in layered GaSe and InSe crystals under high optical excitation have been experimentally investigated. The decisive factor for the observed temporal dependence of the absorption coefficient and its dependence on the excitation intensity is screening excitons by nonequilibrium-carrier plasma. It is shown...

article

The influence of supply voltage on the operating regime of a wind-power plant with a double-fed asynchronous machine

R. I. Mustafaev, L. G. Gasanova

Russian Electrical Engineering > 2013 > 84 > 4 > 216-220

A procedure is presented of calculating the dependence on supply voltage of the operating parameters of wind-power plants hooked up to the power grid via double-fed asynchronous machines.

article

Production and properties of hollow fibres based on polyamide-imide

L. G. Gasanova, V. V. Vasil’ev, M. Yu. Yablokova, A. V. Kepman

Fibre Chemistry > 2012 > 44 > 3 > 164-170

Production of hollow fibres is a promising technology for creating membrane materials with controllable properties. The major factors affecting the structure of hollow fibre are viscosity of the polymer solution, its concentration, and conditions of its casting and post-treatment. The viscosity of the spinning solution is shown to have an effect on the formation of porous structure and its evolution...

article

Modeling of turning angle of the windmill blades of a wind power station working on the power network

R. I. Mustafaev, L. G. Gasanova

Russian Electrical Engineering > 2011 > 82 > 12 > 659-664

Issues of regulation of blades’ turning angle in modern wind power installations working on the electric power system are considered. A blades’ turning angle modeling technique based on catalogue data of wind power installations has been proposed. Investigations of the automatic control system of the blades’ turning angle constructed on the “disturbance” and “deflection” regulation principles have...

article

Torque-power characteristics of modern wind-power facilities

R. I. Mustafaev, L. G. Gasanova

Russian Electrical Engineering > 2009 > 80 > 7 > 406-411

It is suggested that the torque-power characteristics of wind-power facilities equipped with electric machines with frequency converters should be considered in four regimes. The first regime is extends from the startup of a wind-power facility (WPF) to the beginning of the adjustment of its rotational frequency, the second regime is the adjustment of the WPF rotational frequency, the third regime...

article

Modeling the dynamic and static operating conditions of a wind-driven electric plant with a double-supply asynchronous motor

R. I. Mustafaev, L. G. Gasanova

Russian Electrical Engineering > 2008 > 79 > 9 > 477-481

The procedure for modeling a double-supply asynchronous motor during its operation in combination with a windmill is proposed. The advisability of presenting equations in axes d and q rotating at the speed of the rotor speed is given. Calculations are performed for transient processes in the given system during the regulation of both the amplitude and frequency of the rotor supply voltage.

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