35 Result(s)
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Article
Mineralogical properties and co-sintering characteristics of fluxed iron ore with magnetite concentrates
To investigate the feasibility of co-sintering of fluxed iron ore with magnetite concentrates, the mineralogical properties of a novel fluxed iron ore were studied using particle size analysis, microscopic mor...
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Article
A review of surface roughness measurements based on laser speckle method
Surface roughness is commonly used to characterize material microstructure during processing, and accurate measurement of surface roughness is the premise and foundation of machining. Therefore, online non-des...
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Article
The influence of adding niobium and vanadium on hydrogen diffusion in 22MnB5 hot stam** steel
Adding alloying elements is always considered as an effective method to enhance the resistance against hydrogen embrittlement in steels. Nb and V were added into 22MnB5 hot stam** steel, and then their influ...
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Article
Effect of extrusion temperature on microstructure and tensile properties of Mg–Gd–Er–Zn–Zr alloy containing LPSO phase
The Mg–1Gd–0.75Er–0.5Zn–0.18Zr (at.%) alloy with long-period stacking ordered (LPSO) phase was prepared by metal mold casting and hot extrusion. The extruded samples had a typical bimodal microstructure. The d...
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Article
Achieving high strength and ductility in Ti-6.8Mo-3.9Al-2.8Cr-2Nb-1.2V-1Zr-1Sn alloy by rapid optimizing microstructure through gradient heat treatment
In this stuy, a new high-throughput heat treatment method was applied to rapidly optimize the microstructure of metastable β titanium alloy Ti-6.8Mo-3.9Al-2.8Cr-2Nb-1.2V-1Zr-1Sn to obtain high strength and ductil...
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Article
A new discriminative sparse parameter classifier with iterative removal for face recognition
Face recognition has been widely used and developed rapidly in recent years. The methods based on sparse representation have made great breakthroughs, and collaborative representation-based classification (CRC...
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Preparation and capacitance properties of Ni foam@graphene@Co3O4 composite electrode materials
Graphene under high temperature was prepared and loaded on Ni foam. Then, cobalt tetroxide precursor was grown on Ni foam in situ by the hydrothermal method. Finally, the sample was burned at high temperature ...
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Article
Multi-objective optimization based optimal setting control for industrial double-stream alumina digestion process
The operation variables, including feed rate of ore slurry, caustic solution and live steams in the double-stream alumina digestion process, determine the product quality, process costs and the environment pol...
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Article
Interdiscipline between optoelectronic materials and mechanical sensors: Recent advances of organic triboluminescent compounds and their applications in sensing
Triboluminescence, also as known as mechanoluminescence, is an attractive optical behavior that means the light emitted from specific organic and inorganic materials when they are subjected to external forces,...
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Article
Ferroelectric polarization-enhanced photocatalytic performance of heterostructured BaTiO3@TiO2 via interface engineering
A catalyst of ferroelectric-BaTiO3@photoelectric-TiO2 nanohybrids (BaTiO3@TiO2) with enhanced photocatalytic activity was synthesized via a hydrolysis precipitation combined with a hydrothermal approach. Compared...
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Article
Evaluation methods of man-machine-environment system for clean and safe production in phosphorus mines: A case study
Phosphorus is an essential element in agricultural production and chemical industry. However, since the risk of casualties and economic loss by mining accidents, the application of clean and safe production in...
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Article
Effect of volume fraction and mechanical stability of austenite on ductility of medium Mn steel
A hot-rolled medium Mn (0.2C5Mn) steel is annealed at 650 °C to produce an ultrafine-grained duplex microstructure with different austenite volume fractions by austenite reverted transformation (ART) annealing...
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Article
Super long-range diffusion of carbon during proeutectoid ferrite transformation
In order to explore the possible diffusion distance of carbon during proeutectoid ferrite transformation, a slow cooling test of low carbon steel was carried out under vacuum of the thermal simulator. The micr...
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Article
Effects of casting current on structure and properties of a nanostructured Zr–Cu–Fe–Al bulk metallic glass
The effects of casting currents on the thermophysical behaviors, atomic and nanoscale structure, and mechanical properties of two Zr-based-bulk metallic glasses, i.e., Zr59Cu33Al8 and Zr59(Cu0.55Fe0.45)33Al8, wer...
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Article
Extraction of copper and zinc from naturally contaminated copper mine soils: Chemical fractionation analysis and risk assessment
The leaching behaviour of Cu and Zn from contaminated soils at a copper mine was investigated using four extractants: citric acid (CA), oxalic acid (OA), ethylenediaminetetraacetic acid (EDTA) and nitrilotriac...
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Article
Theoretical and experimental investigation on internal gear pair with small sliding ratio
Aiming at the issue of sliding ratio, an internal gear pair is proposed which consists of an involute internal gear and a pinion with quadratic curve teeth. Particularly, the contact pattern is point contact a...
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Article
Coking properties of thermal soluble constituents of coals by N-methyl-2-pyrrolidone solvent
Four types of coals, KL, XB, ZS and GD with different coal ranks, were dissolved with the organic solvent N-methyl-2-pyrrolidone at 350 °C and around 3.0 MPa pressure to obtain thermal soluble constituents (TSCs)...
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Article
Thermogravimetric study of combustion of biomass and anthracite coal by iso-conversional method
The combustion characteristics of biomass, anthracite coal and their blends were investigated using thermogravimetry, and the kinetic parameters and combustion reaction mechanisms were tested by combining the ...
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Article
Human interaction recognition based on sparse representation of feature covariance matrices
A new method for interaction recognition based on sparse representation of feature covariance matrices was presented. Firstly, the dense trajectories (DT) extracted from the video were clustered into different...
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Article
Precipitation behavior of Ti in high strength steels
Precipitation behavior of Ti in high strength steels was investigated by means of the equilibrium solid solubility theory. The contributions of Ti content to yield strength were calculated. The calculated resu...
