Materials Literature
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Various types of accelerators, thiuram (TMTD), thiazole (MBTS), and sulfenamide (CBS) are added into a silica filled natural rubber (NR) compound. Their effects on vulcanization properties are also investigated. TMTD shows a fast vulcanization rate and a higer maximum torque (), as well as excellent mechanical propert…
To improve the design of nuclear systems, high-fidelity neutron fluxes are required. Leadership-class machines provide platforms on which very large problems can be solved. Computing such fluxes efficiently requires numerical methods with good convergence properties and algorithms that can scale to hundreds of thousan…
A well-defined DNA bioconjugated surface is a key component in the development of efficient biosensor platforms for diseases, ranging from point-of-care detection of pathogens and viruses to personalized diagnostics and medication, as well as for drug discovery, forensics, and food technology. We herein describe a uni…
Actin-rich cellular protrusions or pseudopodia form via local actin filament polymerization and branching and represent a variety of polarized cellular domains including lamellipodia, filipodia, and neuronal growth cones. RNA localization and local protein translation in these domains are important for various cellula…
The effect of using fly ash to replace cement on concrete pore size distribution was studied by mercury intrusion porosimetry.The gas diffusion mechanism in concrete and test results was used to estimate the effect of fly ash replacement on O2 and CO2 diffusion in fly ash concrete.The test results provide the total po…
In this paper,the erosion resistance of the magnesia-alumina spinel(MAS) in the synthesis process of lithium cobaltoxide and the related mechanism were studied.After ten cycles of the synthesis process,the erosion depth in the MAS ceramic is only about 100 μm.The MAS material shows good properties.Further researches o…
Mechanical seals are widely used in the primary circuits in all kinds of nuclear power plants.In the nuclear power plant,whether a long-period safe and reliable operation can be achieved is largely determined by the quality of the mechanical seal.So mechanical seal used in the primary circuit is regarded as one of the…
Corrosion behavior of steel bars embedded in pavement concrete subject to synergistic effect of freeze-thaw cycles,chlo-ride salt attack and external loading was studied.The corrosion behavior of steel bars was evaluated by measuring corrosion potential,corrosion current density and corrosion rate using open circuit p…
The electron localization function(ELF) is an important tool to study electronic structure.In this article,the concept of electron localization is introduced and the overlap between the physical meaning and functional form of the ELF is discussed in detail from two points of view:electron pair density and kinetic ener…
A carbonized diatomite was prepared by calcining Inner Mongolia diatomite rich in organic matter under reducing atmosphere.The carbonized diatomite was partly substituted for carbon black to reinforce natural rubber(NR).Fourier-transform infrared spectra(FTIR),X-ray diffraction(XRD),thermoanalysis(TG-DTA),scanning ele…
The graphite oxide(GO) samples with different degrees of oxidation were prepared from purified natural flake graphite via modified Hummers method controlling the amount of oxidant.The structural and spectral analysis for samples were carried out by using XRD,FTIR,Raman and fitting part of spectral data.The results sug…
Rod-plane air gap is the most typical gap in the research of air gap discharge,and its switching impulse characteristic is a very important factor for dimension of air gaps in the project design of transmission lines and converter stations/substations in transmission project.To study switching impulse characteristic o…
Porous anorthite/mullite composite ceramics with different mullite contents were fabricated by foam-gelcasting method,using CaCO3,SiO2,α-Al2O3 as raw materials.Effects of mullite content on bulk density,po-rosity,compressive strength,thermal conductivity and microstructure of the porous composite ceramics were re-sear…
Aiming at estimating the life of solid insulation in the transformer,we experimentally investigated the accelerated ageing process.The results reveal that the aging process of the insulation paper can be divided into quick one and slow one.The relation between initial aging rate(k) and temperature is obtained by Arrhe…
We introduced numerical algorithms for electron transport parameters of air calculated by rigorous Boltzmann equation in order to solve a variety of air discharge in the electron transport parameters,and calculated the electron energy distribution function by using cross-section-data available in the literatures and s…
Bacterial cellulose/polyacrylamide composite hydrogel(BC/PAM) was prepared through free radical polymerization in which polyacrylamide(PAM) was introduced into the network of bacterial cellulose(BC).Structure and properties of composite hydrogels were studied through scanning electron microscopy(SEM),infrared spectrum…
Considering the anisotropic and nonlinear conductivity of oil-immersed paper in converter transformer's insulation,the FEM(finite element method) state equation was obtained by the penalty function method,and the equation was solved by Runge-Kutta method.The transient electric field was calculated of a practical conve…
The analyzed and calculated results indicate that the concrete failure strength will decrease under higher hydrostatic pressure,when the original failure parameters of HJC and RHT models implemented in LS-DYNA and AUTODYN are adopted.A new method is introduced which using the characteristic strength of concrete to con…
For cotton harvesting robot,the cotton image segmentation is one of the key technologies.In this paper,under HSV,HIS,and YCbCr color spaces respectively,according to the difference between cotton color and background color,the various objects(cotton batting,cotton branches,soil etc.) in the sample images were classifi…
Kinetics of titanium hydride decomposition were investigated by DSC/TG tests during elevating temperature and kinetic parameters were calculated by Coast-Redfern integral method.The results show that the initial temperature of titanium hydride decomposition is 510 ℃,whose mass loss ratio reaches 3.15% totally during d…