Theoretical Bases of Increase of Efficiency  of Restoration of the Worn Out Hinged Joints  of Mine Hoisting Machine

Mekhtiyev, A. D.; Yurchenko, A. V.; Bulatbayev, Felix; Neshina, Y. G.; Аlkina, А. D.

doi:10.32014/2018.2518-170x.10

Cited by 4 publications

(3 citation statements)

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“…The results obtained in this paper are relevant and scientifically significant for a number of areas of modern science, particularly for the development of theoretical ideas about the quantum mechanisms of the formation of the ferroelectric state due to the tunnel motion of protons in the hydrogen sublattice of KDP, DKDP crystals, which are of significant practical importance for laser technology (regulators of radiation parameters), nonlinear optics and optoelectronics (electro-optical sensors, strain sensors of hard rocks and building materials, machine parts and mechanisms, etc.) [45][46][47][48][49][50][51][52][53][54], and information technology (thinfilm ferroelectric elements of microcircuits for high-speed, non-volatile storage devices with an abnormally long time maintaining the residual polarization (up to 10 years)) [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44].…”

Section: Discussionmentioning

confidence: 99%

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Influence of Quantum Effects on Dielectric Relaxation in Functional Electrical and Electric Energy Elements Based on Proton Semiconductors and Dielectrics

Kalytka,

Baimukhanov,

Neshina

et al. 2023

Applied Sciences

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Using the quasi-classical kinetic theory of dielectric relaxation, in addition to existing methods, fundamental mathematical expressions are built, which make it possible to more strictly consider the effects of the main charge carriers’ (protons’) tunneling on the numerical values of the molecular parameters (activation energy, equilibrium concentration) of protons in HBC. The formulas for calculating the statistically averaged non-stationary quantum transparency of a parabolic potential barrier for protons have been modernized by more stringent consideration of the effects of corrections caused by an external electric field. For the model of a double-symmetric potential well, a generalized nonlinear solution of the quasi-classical kinetic equation of dielectric relaxation in HBC was built. The phenomenological Bucci-Rive formula for thermally stimulated depolarization current density (TSDC) was first investigated, taking into account quantum transparency, for the case of a parabolic potential barrier. The choice of the parabolic shape of the potential barrier allowed, at a theoretical level, for the mathematical model of relaxation polarization to be brought closer to the conditions of the real spatial structure of the crystal potential field, in comparison with the rectangular potential barrier model. It has been found that quantum effects due to proton tunnel transitions significantly affect the mechanism of thermally stimulated depolarization currents in HBC, over a wide temperature range (50–550 K) and external field parameters (0.1–1 MV/m). Generalized solutions of the nonlinear kinetic equation, recorded considering the effects of field parameters on proton tunnel transitions, made it possible to significantly approximate the theoretical values of activation energies, equilibrium concentrations of protons and amplitudes of the theoretical maxima of the current density of thermally stimulated depolarization, according to their experimental values in the field of low-temperature (50–100 K) and high-temperature (350–550 K) maxima of TSDC density in HBC. For the first time, precision measurements of TSDC temperature spectra were carried out for chalcanthite crystals. The effects of alloying impurities concentrations and crystal calcination temperatures on the parameters of experimental maxima in the TSDC spectrum of chalcanthite were established. A physical mechanism of the quantum tunnel motion of protons in HBC with a complex crystal structure (crystalline hydrates, layered silicates, ferroelectric HBC (KDP, DKDP)) is described. The patterns found in this article indicate a fairly high degree of applied scientific significance for the obtained theoretical results, allowing for the further development of electrophysics and optoelectronics of heterogeneous structures (MIS, MSM) based on proton semiconductors and dielectrics (PSD) and their composites.

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Section: Discussionmentioning

confidence: 99%

“…[45][46][47][48][49][50][51]. Fiber-optic strain sensors based on KDP and related crystals are promising [52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Influence of Quantum Effects on Dielectric Relaxation in Functional Electrical and Electric Energy Elements Based on Proton Semiconductors and Dielectrics

Kalytka,

Baimukhanov,

Neshina

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The speed of cargo transportation is often determined by the technological process, the conditions of loading and unloading, the design features of the conveyor, the properties of the cargo, the speed of information processing by the electronic control system. In order to improve the performance of the conveyor, there can be increased the volume of the load per unit length of the traction chain or transportation speed [2]. However, ceteris paribus, the speed is limited by the dynamic loads in the traction chains and other elements of the conveyor.…”

Section: Mathematical Model Of Apron Conveyor Controlled Electric Drimentioning

confidence: 99%

Mathematical Model of Apron Conveyor Controlled Electric Drive in Operation Starting Modes

Breido¹,

Intykov²,

Daniyarov³

et al. 2019

SERIES OF GEOLOGY AND TECHNICAL SCIENCES

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Construction of simulating analogues of ventilation networks by base points

Levitskiy

Nurgaliyeva

Akimbekova

et al. 2019

J. Phys.: Conf. Ser.

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The ventilation systems of the mines are complicated by the presence of extensive open spaces and collapses, significant failures with ground outlets, which form complex aerodynamic connections not only between separate horizons, but also the system of underground workings and the surface. In this regard, to reduce the dimension of the original ventilation scheme, it is proposed to analyse not a true large-dimensioned calculation network, but a minimized one, the structure of which is different from the real one, and can be represented as an approximating analogue. It was established that the construction of structural-functional analogise by approximation on the base points allows the design schemes to be constructed in the absence of information about internal aerodynamic connections in the system of underground workings complicated by collapse zones, blockages, dips, etc. The method of constraints is proposed, which allows determining the boundaries of the search for a set of positive values of the aerodynamic resistance of equalizing branches when solving a system of nonlinear equations describing the constructed analogue.

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Theoretical Bases of Increase of Efficiency of Restoration of the Worn Out Hinged Joints of Mine Hoisting Machine

Cited by 4 publications

References 0 publications

Influence of Quantum Effects on Dielectric Relaxation in Functional Electrical and Electric Energy Elements Based on Proton Semiconductors and Dielectrics

Influence of Quantum Effects on Dielectric Relaxation in Functional Electrical and Electric Energy Elements Based on Proton Semiconductors and Dielectrics

Mathematical Model of Apron Conveyor Controlled Electric Drive in Operation Starting Modes

Construction of simulating analogues of ventilation networks by base points

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