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4841
Determination of the Band Gap Energy of SnO<sub>2</sub> and ZnO Thin Films with Different Crystalline Qualities and Doping Levels
Published 2025-02-01“…However, there is no single method for its determination; rather, different approximations depend on the crystalline quality and the doping level because these modify the energy band structure of the semiconductor. …”
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4842
Energy-and-Technology Installation Based on a Rolling Mill Heating Furnace with the Option of Hydrogen Production
Published 2022-04-01“…The main aspects and features of thermochemical methods of hydrogen production are shown from the standpoint of choosing the number of stages of chemical reactions implementation and determining the thermodynamic conditions for their conduct. …”
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4843
POWER, METALLURGICAL AND CHEMICAL MECHANICAL ENGINEERING FLOW TYPE THERMOELECTRIC HEAT TRANSFER INTENSIFIER
Published 2017-10-01“…The aim of the study is to develop a construction design that increases the intensity of heat exchange between media and optimises the energy and mass dimensions of the instrument indicators.Methods. A method for the theoretical investigation of thermoelectric heat transfer intensifiers is used, which, by means of forced air flows along the junctions of thermoelements, provides a higher coefficient of heat exchange between media moving in transport zones with altering temperature.Results. …”
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4844
ELECTROMAGNETIC AND SOUND INSULATION PROPERTIES OF COMBINED SHIELDS BASED ON THE NEEDLE-PUNCHING MATERIAL AND FRAGMENTS OF ALUMINUM FOIL
Published 2020-03-01“…Using an automated meter of transmission and reflection coefficients SNA 0.01–18, shielding characteristics in the frequency range 0.7–17 GHz of the shield samples made in accordance with the proposed method have been obtained. …”
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4845
Properties of the Wrońskian determinant of a system of solutions to a linear homogeneous equation: The case when the number of solutions is less than the order of the equation
Published 2023-12-01“…The work sets out to study the properties of the Wrońskian determinant of the system of solutions to a linear homogeneous equation in cases when the number of solutions is less than the order of the equation, comparing them with the known properties of the same determinant when the number of solutions is equal to the order of the equation.Methods. …”
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4846
On the Third Hankel Determinant of a Certain Subclass of Bi-Univalent Functions Defined by (<i>p</i>,<i>q</i>)-Derivative Operator
Published 2025-04-01“…The functions are analyzed using a suitable operational method, which enables us to derive new bounds for the Fekete–Szegö functional, as well as explicit estimates for important coefficients like <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mrow><mo stretchy="false">|</mo></mrow><msub><mo>ℓ</mo><mn>2</mn></msub><mrow><mo stretchy="false">|</mo></mrow></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mrow><mo stretchy="false">|</mo></mrow><msub><mo>ℓ</mo><mn>3</mn></msub><mrow><mo stretchy="false">|</mo></mrow></mrow></semantics></math></inline-formula>. …”
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4847
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4848
Matching Pattern and Regional Regulation of Agricultural Water and Land Resources in Heilongjiang Province
Published 2022-02-01“…[Objective] The matching coordination level and regional differences of agricultural water and land resources at the city scale in Heilongjiang Province was analyzed in order to provide scientific guidance for the optimal allocation of regional agricultural water and land resources and the improvement of agricultural production pattern. [Methods] Using agricultural water and land resource data from 13 cities of Heilongjiang Province from 2009 to 2019, the Gini coefficient and the matching coefficient method were used to analyze the spatial distribution characteristics of agricultural water and land resources and their matching temporal and spatial evolution patterns. …”
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4849
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4850
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4851
Measuring thermoelectric module properties by time-domain impedance spectroscopy using heat leakage at 300 K
Published 2025-03-01“…This method accounted for heat leakage through lead wires connected to a bismuth–telluride-based Π-shaped thermoelectric module. …”
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4852
Study of Reinforced Concrete Beams on Yielding Supports under Short-Term Dynamic Loading
Published 2023-01-01“…For reinforced concrete beams on yielding supports, the equation of motion, function and coefficient of dynamism are determined. It has been established that the use of elastic yielding supports can have both positive and negative effects on the operation of structures, which is expressed in the excess of forces and displacements of structures on elastic supports relative to elements on non-displaceable supports. …”
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4853
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4854
MATHEMATICAL MODEL OF THE MOTION PALLET PROCESS ON BRAKE MAGNETIC TYPE ROLLER
Published 2020-07-01“…For a reasonable choice of the design parameters of the magnetic brake roller, experimental studies are required to determine a magnetic viscosity coefficient.…”
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4855
CFIA-Turbidimetric and Photometric Determination of Vitamin B9 (Folic acid) Using LEDs as a Source of Irradiation and Two Solar Cells as an Energy Transducer
Published 2017-12-01“…Optimum parameters was studied to increase the sensitivity for developed method. The linear range for the calibration graph was 0.01-0.6 mMol.L-1 of vitamin B9 and LOD was 131.994 ng/sample with correlation coefficient ( r ) of 0.9810, RSD% was lower than 0.1%, (n=9) for the determination of vitamin B9 at concentration (0.07and 0.5) mMol.L-1 respectively. …”
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4856
Study on the pressure wave and interior pressure fluctuation of the intercity EMU passing through the tunnel
Published 2022-11-01“…The empirical formula was used to calculate the interior pressure fluctuation under different dynamic tightness coefficients. The computational results show that the pressure wave of the intercity EMU passing through the tunnel is mainly determined by the train speed and the blocking ratio, and the influence of the train speed is more significant. …”
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4857
Determinants of height-for-age Z-score (HAZ) among Ethiopian children aged 0–59 months: a multilevel mixed-effects analysis
Published 2025-05-01“…This study examines HAZ as a continuous measure to explore its proximal and distal determinants. Methods Data from 5,045 children aged 0–59 months from the 2019 Ethiopian Mini Demographic and Health Survey were used. …”
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4858
Methodology of regional analysis of the Russian economic reseaerch market
Published 2019-05-01“…A cross-correlation matrix has been constructed for the above indicators and an integral indicator with all linear paired regression equations in which the values of the coefficient of determination R2 varied in the range from 0,93 to 0.99. …”
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4859
Temperature in the Period of Decreasing Drying Rate of Thin Flat Capillary-Porous Wet Materials
Published 2025-05-01“…The methods for determining the average temperature for the period of decreasing drying rate are presented; they are based on complex variables, viz. generalized drying time and the ratio of drying time by period. …”
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4860
Energy intensity of water supply by pumping stations during reconstruction of irrigated sites using low-pressure sprinkling machines
Published 2025-03-01“…Purpose: to assess the energy intensity of water supply by pumping stations during partial and complete reconstruction of an irrigated area, to refine the methodology for calculating the optimal energy intensity of water supply by a pumping station to improve irrigation efficiency. Materials and methods. To assess the efficiency of irrigation and the energy intensity of irrigation during reconstruction, it is necessary to carry out hydraulic and energy calculations. …”
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