Materials Literature
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The article discussed the method to measure the hair density of Rex by optical microscopes. 5 different body parts of the Rex hair density were determined using frozen section method, in order to offer the reference of the Rex hair density.
The basic mechanism of ultrasonic technique was summarized.Applications of power ultrasonic in catalytic reactions,catalyst preparation and regeneration were presented.And its development trend was also discussed.
The paper gives the constitution of a mechanism which is used to clean the blackboard and at the same time stop the powder from harming the human health. Symmetry of structure is used in this design.The constitution and working theory of the mechanism are introduced and some important parts of the mechanism are design…
Golden saltwater pearls and color-treated golden pearls were tested and analyzed.According to the magnify observation,the surface of golden saltwater pearls were smooth.The surface of color-treated golden pearls was destroyed; color was enriched in local area.In Raman spectra,fluorescence background of color-treated g…
This paper investigated the configuration of M2B borides in the microstructures of Fe-Cr-B alloys after modification with 1# rare earth .The experimental results show that the as-cast modified configuration of M2B borides in the microstructures of Fe-Cr-B alloys is much finer and the original distribution of M2B borid…
In order to reveal flow laws of impeller parts in die forging process,the deformation and flow of different shape blank forming process was studied using the finite element method.The results show that cylindrical shape can be formed more easily;stepped shape billet occurs mainly in the end.Compared with cylindrical s…
Sm-Fe system giant magnetostrictive films were prepared by ion beam sputtering.The bending property of the giant magnetostrictive film/glass substrate cantilever was studied by finite element modeling.The internal magnetic states of the giant magnetostrictive films were simulated.The finite element analysis results sh…
In order to prepare waterborne polyurethane(WPU) with better water resistance, the WPU emulsion was synthesized with polyester diol(PBA), toluene diisocyanate(TDI) and 2,2-dimethylol propionic acid (DMPA) as main raw materials. The influences of DMPA content, R value(namely molar ratio of -NCO to -OH) and cross linker…
A scheme for SF6 gas leak-detector with negative corona discharge principle was designed.The hardware circuit mainly consisted of low-power components,in which sensing circuits with hardware redundant technology resolved the traditional problems of zero-point drift and false alarm.The system with light-coupled isolati…
In order to better understand mechanism of activating in fly ash-cement paste,solid state nuclear magnetic resonance(NMR) technology was used.()~(29)Si-NMR test results indicate that the structure of fly ash glasses has been changed from concentrated high-polymerization to scattered low-polymerization by the role of a…
The microstructures and mechanical properties of AZ91magnesium alloy added by plumbum (Pb) were investigated by scanning electron microscopy (SEM),electron probe microanalyzer (EPMA) and tensile tests. The results have indicated that Pb refines α-Mg and β-Mg17Al12 grains,suppresses the precipitation of secondary β pha…
Water samples collected from coastal water of Jiaonan and its adjacent water in summer(August) and winter(December) in 2006 were analyzed.The species composition,the horizontal and vertical distribution of cell abundance,dominant species distribution,and community diversity were studied.A total of 111 species which be…
The application of finite element in the mechanics analysis on PET beer bottle was introduced. On the basis of structural analysis,ANSYS was applied to carry on the simulation analysis of PET beer bottle. The influence of bottle's thickness on mechanical performance of PET beer bottle was introduced. The purpose was t…
[Objective]The study aimed to investigate the carotenoid level change and cbp gene expression character in silkworm larvae. [Method]The silk glands of 3th,4th,5th instar larvae of silkworm with yellow and green cocoon strains were selected to extract their total DNA by referring to the reagent introduction of Takara T…
In this paper, the MEA deformation under different pressure differences was measured in PEMFC operating environment.Based on the clamped-clamped beam model in mechanics, the relation between MEA deformation and pressure difference was established, and the deflection cure equation was also modified with the first order…
In order to reveal the mechanism of carbonization process in preparation of activated carbon from tobacco stems with KOH-activation,the pyrolytic process of tobacco stem and that impregnated with KOH was carried out by using thermo-gravimetric analyzer at different heating rates of 5,15,30 K/min in N2 atmosphere.The t…
The influence of extrusion and subsequent heat treatment process of the 25Cr5MoA/Q235 clad shaft prepared by means of hot charging on interface microstructure,diffusion of Cr,micro-hardness and bonding strength was investigated.the results showed that an oxide layer which almost distributed continuously was formed in…
Waterborne double–component fluorocarbon resin ZH–01 and double–component waterborne fluoro- carbon coating materials were developed. The effect of the dosage of curing agent ADH (adipic dihydrazide) on gelling rate of emulsion and coating hardness was studied. A mass ratio of fluorine-containing emulsion to ADH was d…
According to the rolling behaviour of 1500 roughing trains of hot strip mill,a 3D elastic-plastic FEM model for edger and horizontal roll was established with ANSYS/LS-DYNA.The effect of different edger rolling,different reduction in thickness,different width and different thickness on slab head and tail shape has bee…
Three kinds of 2-hydroxypropyltrimethyl ammonium chloride chitosan(HACC) with different degrees of substitution(DS: 37.3%,56.0%,81.5%) were synthesized by the reaction of chitosan with glycidyltrimethylammonium chloride(GTMAC),and characterized by FT-IR and()~1H-NMR spectro-(scopy.) Their properties such as water solu…