Materials Literature
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The effect of rotor pole-shoe construction on the electromagnetic losses of frequency-converter fed wound-field synchronous motors is studied by numerical simulations. In the machine under examination, a reduction of 6.8 % in the rated-load total electromagnetic losses was achieved merely by modifying the rotor pole-s…
In this paper we research on the run time characteristics of non-magnetic hydraulic navigation simulator and approach a corresponding control strategy. Since the simulator is designed to be non-magnetic, it consists of long hydraulic pipes separating electric part and mechanical part to avoid the magnetic interference…
The article shows the significance of constrained simulation of both the technological and structural behavior of cast parts for the purpose to improve service performance and durability of the parts. Complicated shape cast part was analyzed under loading conditions and as a preliminary the casting process was simulat…
Gallium, aluminum, fluorine, and indium doped ZnO (ZnO:Ga, ZnO:Al, ZnO:F, and ZnO:In) thin films have been deposited by the chemical spray technique on soda lime glass substrates. The effect of different dopant elements on the electrical, optical, structural, and morphological properties has been investigated. The X-r…
Surface flashover phenomena in vacuum restrict the overall performance of vacuum solid insulation system. Since accidents caused by surface flashover in vacuum occur constantly, it is always the international highlight to study some new insulating materials and insulation structure with high electric withstanding for…
A cell voltage equalizer using a series-resonant inverter and voltage multiplier is proposed. Unlike conventional equalizers that require multiple switches and/or magnetic components, the proposed equalizer can be configured with two switches and a single magnetic component. This means the circuitry can be significant…
In situ doping with Zn and C impurities induces periodic twin plane boundaries along the axis of planar; GaAs nanowires grown via Au-catalyzed vapor-liquid-solid (VLS) mechanism in a MOCVD environment.
Abstract Summary: In this study we report both the development of dithiocarbamate resins from the commercial hypercrosslinked resin MN‐250 and the evaluation of the biocidal capacity of this material against E. coli ATCC25922 suspensions. The preparation of dithiocarbamate resins followed a synthetic pathway based on…
The numerical simulation of the kinetics of the molecular interaction in a system containing mobile polymer clusters is performed on the basis of the bond-fluctuation model (BFM). Power-law dependences of the rates of molecular reactions on the concentration of these monomers are observed above the critical concentrat…
To improve the intelligence and reliability of the vacuum circuit breakers in power gird, a high accurate smart system was designed for On-line condition monitor of vacuum interrupters inner pressure. Through the study of dielectric theory and exploration of the inherent laws of shield potential with different pressur…
High porous silica aerogel/polyurethane polymer composite was manufactured by cross-linking polymeriza tion of polyurethane foaming process. The properties of microstructure, mechanical strength, and thermal properties were investigated for its various applications. The superhydrophobic silica aerogel powders were use…
Well-defined crystalline PbSe nanocubes and nanospheres have been synthesized through a simple hydrothermal method by using Pb2+- EDTA and Pb2+- oleylamine complexes at 180°C for different reaction times. Composition and morphology of the samples have been characterized by means of XRD and SEM. Gradual release process…
Contamination of the environment with Nanosilver particles (AgNPs) has caused considerable concern. Atpresent there is little information of AgNPs toxicity, especially in aquatic environments. The purpose of this studywas to evaluate toxic effects of AgNPs on Zebrafish (Danio rerio) embryonic development. Toxicity tes…
Component deterioration due to a crack is of the highest importance for the engineering community. Fracture mechanics have mainly been used for studying and evaluating crack or defect nucleation and propagation. This article presents a methodology based on inducing a crack (cut) into mechanical components to character…
OBJECTIVE: To study the rudimentary immunoregulatory mechanisms of Ganoderma spore oil on immunocompromized mice model. METHODS: Thrity KM mice were randomly selected and assigned into three groups (ten animals per group): the model control group, Ganoderma Lucidum spores oil group and the normal control group. The mo…
Through a Raman analysis, we detected polymorphism at high pressure on mixtures of α-GeO2 microcrystalline powder and water under impact experiments with a single-stage gas gun. The Raman measurements taken from recovered samples show two vibrational modes associated with water-related species. After the impact, the s…
Título en ingles: Evaluation of the plankton composition in four overflow lagoons from Metica river (Puerto Lopez, Meta, Colombia)Título en portugués: Avaliação da composição do plâncton em quatro lagoas de estouro do rio Metica (Puerto Lopez, Meta, Colômbia)Resumen: Se determinó la composición cualitativa de las comu…
Using examples of some perspective electronic materials (HgSeS, Fe3O4, InN, and others) it is shown that magnetoresistance data at high magnetic elds allow evaluating the true values of mobility of charge carriers in spite of any adverse factors. Additional impacts involving high pressure and irradiation with high-ene…
To enhance the quality of finite-element-simulations the dependency of field variables significantly influencing friction behavior has to be taken into account. Therefore a new model was developed to optimize friction in the simulation of cold forging processes. The friction coefficient depends on contact normal stres…
Abstract Amorphous ribbons of the systems Fe60Co20Si10B10 and Fe50Co20V10Si10B10 have been prepared via melt spinning to be used as electrode materials in alkaline water electrolysis. It turned out that the gas atmosphere during melt-spinning has a significant impact on the surface morphology and microstructure of the…