Materials Literature
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In order to study the effect of distribution and release of residual charges on very fast transient overvoltage(VFTO) during switching process of disconnectors,on the basis of transmission line equations related to charge density and current along the line(C-model),we used the finite element method(FEM) and finite dif…
Chinese helium-cooled solid breeder(CH HCSB) test blanket module(TBM) with helium cooling system and secondary cooling water system was modeled and thermal-hydraulic behavior and safety performance of the system were assessed using the RELAP5/MOD3.4 code.According to the accident sequences of ITER accident analysis sp…
Amorphous CoP alloy and metal Co supported on carbon nanotubes(CoP/CNTs,Co/CNTs) catalysts were synthesized through deposition method.The phase structure,morphology,composition and specific surface area of the catalysts were characterized by XRD,TEM,XPS,BET,etc.,and the catalytic activities of the obtained catalysts w…
The Al2O3-ZnO-Bi2O3-B2O3 low-melting glasses were prepared using conventional melt quenching technique.The effects of Bi2O3 content on structure,characteristic temperature,coefficient of linear expansion αl and density of the prepared glasses were studied.The results show that with the increase of Bi2O3 content,some […
The influence of electric pulse frequency on the solidification microstructure and mechanical properties of high- boron middle- carbon alloy has been investigated. The experimental results show that electric pulse has obvious influence on the eutectic ledeburite and hard phase of the steel, lead to the change of mecha…
Enrofloxacin(ENRO) molecular imprinted polymers(MIPs) obtained via precipitation polymerization were added to the polyvinyl alcohol(PVA) aqueous solution.Then electrospinning technique was employed to prepare ENRO molecularly imprinted nanofiber membranes(MINFMs).We investigated the effects of concentration of PVA sol…
In order to study the projection angles in asymmetrical structure,the oblique shock wave theory was used to describe the process of detonation wave shocking on the metal surface.The calculation method of projection angle was obtained after the velocity multiplication law on free surface simplified the shock wave theor…
The relationship between structure and its static thermal stability of PVC was studied.The structure was analyzed using GPC,IR,NMR and its static thermal stability was characterized using oven method,Congo red test,TG and so on.It showed that,the smaller the molecular weight,the more the content of allyl chloride and…
The CNx films were deposited on monocrystal silicon substrates by pulsed laser ablation of CNx target under the nitrogen gas pressure ranging from 2 Pa to 11 Pa.The chemical composition,bonding properties and surface morphology of the CNx films are investigated by X-ray photoelectron spectroscopy(XPS),Raman spectrosco…
The solid alkaline catalysts of supported potassium halides were prepared by impregnation method and used in the methanolysis of phenyl urea with methanol to synthesize methyl N-phenyl carbamate( MPC); the influence of oxide supports and potassium halides on the catalyst performance was investigated. The results indic…
A new method for the fabrication of CNTs/Fe-Ni/TiO2 porous composite film was proposed.Firstly,nickel and iron doped titanium dioxide precursor containing block polymer P123 was prepared by sol-gel method.Then,Fe-Ni/TiO2 porous film on SnO2 doped with fluorine(FTO) conductive glass substrates was prepared using spray…
Heat dissipation in micro-nano-scale devices is one of the bottlenecks which hinder the further development of the semiconductor industry. A series of procedures should be performed to dissipate the heat generated by the electronic device to the environment, which in- volves the thermal transport across interfaces and…
It introduced the case of marine vessels trying the B20 biodiesel blended fuel of the CNOOC New Energy Investment Co.This was the first time that a high percentage of biodiesel blended diesel fuel used for the engines in China.The 700 h trial showed that when using the B20 biodiesel blended fuel,the maximum detonation…
The new trends of the development of FCC catalyst in the new situations were introduced based on the FCC catalyst composition and performance.The new development trends of RFFC of optimizing the zeolite pore structure and acidity,improving coke selectivity,enhancing metal tolerance,and developing special catalyst were…
RC frame structures severely damaged,even collapsed in weak column mode were well documented during the past post-earthquake investigations.A collapse simulation system for RC frame structures based on discrete element method was established by discretizing a structure into slab-column discrete system or beam-column-j…
The vasorelaxation and cholesterol reducing activities of marine collagen oligopeptides( MCOP) were investigated. The vasorelaxation activity of MCOP was evaluated through determination of the secretion of nitric oxide( NO) in human umbilical vein endothelial cell( HUVEC). The results showed that MCOP could increase t…
Properties of Gemini surfactants are superior to conventional surfactants owing to their unusual chemical structure. And the influence of the spacer group has been turned out to be predominant therefore it is of utmost importance to investigate into its effect on Gemini surfactants,which can help to better understand…
Nonionic/zwitterionic surfactant,namely ethoxylated betaine surfanctant(EBS),was synthesized starting from sodium alcohol ethoxylate sulfate,dimethylamine and sodium chloroacetate by a two-step process.Molecular structure of EBS with an ethoxylate segment between hydrophobic carbon chain and hydrophilic group was char…
This article introduces the characteristics and hazards of oily emulsified wastewater and describes the application scope and advantages and disadvantages of the traditional technologies and methods in oil emulsified wastewater. Also it expounds the membrane classification and characteristics of the membrane technolog…
A method that uses magnetic collecting ring to measure cathodic protection current in pipelines was proposed to improve the detection sensitivity.The magnetic collection effect of different magnetic collecting rings on the magnetic flux density produced by 0.1 A~1.0 A cathodic protection current was experimentally stu…