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Performance analysis of grid-integrated brushless doubly fed reluctance generator-based wind turbine: modelling, control and simulation
Springer Science and Business Media LLC - Tập 2 - Trang 1-9 - 2019
Due to the absence of the rotor windings, the brushless doubly fed reluctance generator (BDFRG) presented a much better efficiency with less complicated control and modelling than that introduced by the brushless doubly fed induction generator. As a result, the BDFRG gained more preference than that of the doubly fed induction generator. Moreover, this result led to the emerging of the (BDFRG) as ...... hiện toàn bộ
Elastic three-dimensional graphene sponge fabricated by the liquid crystals of controlled large graphene oxide sheets
Springer Science and Business Media LLC - Tập 1 - Trang 1-9 - 2018
Three-dimensional graphene (3DG) sponge has attracted increasing attention because it combines the unique properties of cellular materials and the excellent performance of graphene. Preparation of 3DG sponge depends mainly on the self-assembly of graphene oxide sheets. In the case of using uniform large graphene oxide and ultralarge graphene oxide sheets, the nematic liquid crystals (LCs) phases a...... hiện toàn bộ
Fusiform gold nanoparticles by pulsed plasma in liquid method
Springer Science and Business Media LLC - Tập 1 - Trang 1-8 - 2019
We have synthesized fusiform gold nanoparticles by recovering gold from a solution of gold nanoparticles obtained by dispersing of gold electrodes in hexane by pulsed plasm in liquid method. Formation of fusiform gold nanoparticles with length from 50 to 150 nm, and diameter of 5–15 nm was achieved by pulsed plasma in liquid method. Fusiform gold nanoparticles obtained by our method are different ...... hiện toàn bộ
Assessing the soil quality index as affected by two land use scenarios in Miandoab region
Springer Science and Business Media LLC - Tập 2 - Trang 1-11 - 2020
In this research, the physical, chemical and biological properties of 19 soil indicators using 80 samples (0–25 cm) were quantified to measure the soil quality index (SQI) in Miandoab region, Iran, across different land uses. These properties include aggregate stability (AS), bulk density (BD), soil moisture content (θm), saturation percentage (SP), particle size fractions (clay, silt, sand), pH, ...... hiện toàn bộ
Fuzzy logic-based tuning of PID controller to control flexible manipulators
Springer Science and Business Media LLC - Tập 2 - Trang 1-11 - 2020
Flexible manipulators are widely used in overhead cranes for industrial purposes and accurate control of the tip point of such a system is very difficult. Control of a 6DOF flexible manipulator is attempted in this study. Model of the manipulator is built in sim-mechanics environment of MATLAB and simulated. Joints of the manipulator are made flexible with the use of joint spring and damper. The b...... hiện toàn bộ
Diffusion bonding of a titanium alloy to austenitic stainless steel using copper as an interlayer
Springer Science and Business Media LLC - Tập 1 - Trang 1-9 - 2019
Diffusion bonding was accomplished between Ti–6Al–4V alloy and AISI 304 austenitic stainless steel utilizing copper as an interlayer in the holding time variety of 45–105 min for 925 °C under 14 MPa load in a vacuum. After bonding, the microstructural study including metallographic examination and energy dispersive spectroscopy, microhardness survey, lap shear strength test, and ram tensile test w...... hiện toàn bộ
Biophysical investigation to assess the toxicity of the herbicide 2, 4-dichlorophenoxyacetic acid on rats blood serum: a FTIR spectroscopic study
Springer Science and Business Media LLC - Tập 5 - Trang 1-8 - 2023
This study utilized the FTIR technique to investigate and assess the herbicide 2, 4-Dichlorophenoxyacetic acid-induced blood serum toxicity. The study was conducted on 15 albino Wistar rats, divided into two groups: a control group (5 rats) and an intoxicated group (10 rats). Serum samples were investigated using the FTIR technique, and the obtained spectra from both groups were analyzed. Our resu...... hiện toàn bộ
Optimization of process parameters during WEDM of EN-42 spring steel
Springer Science and Business Media LLC - Tập 2 - Trang 1-11 - 2020
The present work aimed to carry out the machining of EN-42 spring steel in wire electrical discharge machining with zinc-coated brass wire using distilled water as a dielectric medium. The effect of WS2 powder added in a dielectric medium, on the metal removal rate and surface roughness has been evaluated. With the use of WS2, the conductivity of the dielectric is found to be constantly equal to 1...... hiện toàn bộ
Fabrication and dry sliding wear study of Al6061/mussel-shell particulate composites
Springer Science and Business Media LLC - - 2019
Ecological risk assessment of heavy metal-contaminated soils of selected villages in Zamfara State, Nigeria
Springer Science and Business Media LLC - Tập 3 - Trang 1-13 - 2021
The incidence of heavy metal contamination in Zamfara State, northern Nigeria, due to artisanal mining in some villages has resulted in the pollution of a vast area of land and water. This study evaluated the extent of environmental risks caused by heavy metals. It involved five (5) villages (Bagega, Dareta, Sunke, Tunga, and Abare) where mining activities were taking place and Anka town with no r...... hiện toàn bộ
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