24 Result(s)
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Article
Research progress of permanent ferrite magnet materials
Permanent ferrite magnet materials are extensively employed due to their exceptional magnetic properties and cost-effectiveness. The fast development in electromobile and household appliance industries contrib...
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Open AccessHigh-dimensional aerodynamic data modeling using a machine learning method based on a convolutional neural network
Modeling high-dimensional aerodynamic data presents a significant challenge in aero-loads prediction, aerodynamic shape optimization, flight control, and simulation. This article develops a machine learning ap...
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Improved uniformity of deposited metallic layer on hybrid micro/nano-structured Si substrates fabricated by two-step laser ablation for SERS application
Surface-enhanced Raman scattering (SERS) has been widely used as an effective technique for low-concentration molecules detections in the past decades. This work proposes a rapid and accessible process to fabr...
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Efficient and accurate worm grinding of spur face gears according to an advanced geometrical analysis and a closed-loop manufacturing process
Worm grinding has been applied to manufacture gears to pursue high accuracy and fine surface finish. When the worm used to grind face gears is manufactured with multi-axis computer numerical control (CNC) mach...
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In-site core disking phenomenon and break mechanism of hard marble: Investigation in 2400 m deep-buried underground laboratory
The core-disk phenomenon has been observed generally in the drilling process under high-stress conditions. This paper presents the in-situ experimental study of the coring-disking failure mechanism of marble i...
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Ablation resistance and mechanism of SiC/ZrC-ZrB2 double layer coating for C/C composites under plasma flame
To improve the ablation resistance of carbon/carbon (C/C) composites, a SiC/ZrC-ZrB2 double layer coating was fabricated by pack cementation and slurry-sintering method. The ablation resistance of the SiC/ZrC-ZrB
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Facile synthesis of Sb@Sb2O3/reduced graphene oxide composite with superior lithium-storage performance
Sb-based materials have been considered one of the most promising anode electrode materials for lithium-ion batteries, whereas they were commonly synthesized through time-consuming and costly processes. Here, ...
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Surface property variations in flotation performance of calcite particles under different grinding patterns
Based on the working principles of particle bed comminution, particles produced by high-pressure grinding rolls (HPGR) have surface properties different from particles produced by other grinding patterns, whic...
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Article
Dynamic and Static Combination Method for Fracture-Vug Unit Division of Fractured-Vuggy Reservoirs
Ying Mai-2 Block of Tarim Oil Field is a karst fractured-vuggy reservoir. Along with the research on well location demonstration and recovery ratio improvement in the develo** progress, the importance of fra...
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Article
Characterization of terbium-doped nano-hydroxyapatite and surface modification
The control synthesis of nanoparticles was the implementation process of material ideal design. Nano-hydroxyapatite (HAP) was prepared by a hydrothermal method with calcium nitrate and diammonium hydrogen phos...
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Article
Biogenic characteristics of Mesozoic cherts in southern Tibet and its significance
The **alu chert, which contains abundant biological information, were investigated by major element analysis, micro-Raman, SEM and EPMA. The results show that SiO2 content of chert is 84.12%–93.08%, averaging 89....
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Closed-form solution to thin-walled box girders considering effects of shear deformation and shear lag
Considering three longitudinal displacement functions and uniform axial displacement functions for shear lag effect and uniform axial deformation of thin-walled box girder with varying depths, a simple and eff...
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Article
16s rDNA based microbial diversity analysis of eleven acid mine drainages obtained from three Chinese copper mines
Eleven acid mine drainage (AMD) samples were obtained from southeast of China for the analysis of the microbial communities diversity, and the relationship with geochemical variables and spatial distance by us...
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Simulation of stray grain formation during unidirectional solidification of IN738LC superalloy
The influence of casting parameters on stray grain formation of a unidirectionally solidified superalloy IN738LC casting with three platforms was investigated by using a 3D cellular automaton-finite element (C...
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Microstructures and wear resistance of chromium coatings on P110 steel fabricated by pack cementation
In order to obtain a high-performance surface on P110 steel that can meet the requirements in oil/gas field environment, the chromium coatings were fabricated by pack cementation. The chromium coatings differe...
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Morphologies of hydroxyapatite nanoparticles adjusted by organic additives in hydrothermal synthesis
Properties of hydroxyapatite (HA, Ca10(PO4)6(OH)2), including bioactivity, biocompatibility, solubility and adsorption could be tailored over wide ranges by the control of particle composition, particle size and ...
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Article
Mechanical model for yield strength of nanocrystalline materials under high strain rate loading
To understand the high strain rate deformation mechanism and determine the grain size, strain rate and porosity dependent yield strength of nanocrystalline materials, a new mechanical model based on the deform...
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Article
Caledonian reworking of Paleoproterozoic basement in the Cathaysia Block: Constraints from zircon U-Pb dating, Hf isotopes and trace elements
A combined study of zircon U-Pb dating, Hf isotopes and trace elements has been carried out for granodioritic neosomes of migmatites from the Tian**g** area in northwestern Fujian Province. Zircons are char...
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Formation mechanism of breccia pipe type in Yixingzhai gold deposit
Based on the basic geological features of Yixingzhai gold deposit, the geological features, classification and relation to mineralization of breccia pipes were discussed by surveying the xenoliths and breccia’...
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Article
Preparation of jarosite by Acidithiobacillus ferrooxidans oxidation
The formation of jarosite in the presence of Acidithiobacillus ferrooxidans (A. ferrooxidans) was researched to ascertain the conditions of producing minimum precipitation. The effects of salt concentration and p...
