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Online since: January 2015
Authors: Arturo Mendoza Castrejón, Herlinda Montiel Sánchez, Guillermo Alvarez Lucio
Discussions The domain wall bulging occurs when the domain wall is pinned to any structural defects such as grain boundaries, precipitates, dislocations, etc. and it is bulged by the pressure of the applied magnetic field.
(3) Where m is the effective mass of the domain wall, β is the viscous damping factor, α is the restoring force, MS is the saturation magnetization, H0 is the amplitude of the applied field, ω is the angular frequency, j the basis of imaginary numbers, t is the time and x is the domain wall displacement.
Online since: June 2015
Authors: S. Satish Kumar, C. Shanjeevi, Thomas Joseph Jobin
The microstructures are analyzed in parent material and welded region as shown in Fig. 2 by showing recrystallized grains in weld region than their respective base materials.
Larger the better S/N ratio (η) (1) Where n = number of replications and yij = observed response value, where i = 1, 2,.., n; j = 1,2...k Table 5.
Online since: December 2010
Authors: Jun Feng Pei, Wei Ying He, Jun Ning Liu
Fracture positions of the specimens treated by LSP were not in the welded joints because large residual stress has been induced on the surface of joints, significantly improving the defects of loose and uneven microstructure and coarse grain so as to obtain joints with excellent corrosion resistance that well resisted corrosion of wet H2S medium.
Consequently, a large number of hydrogen atoms entered steel substrate, resulting in brittleness of steel.
Online since: January 2012
Authors: Yin Hua Ma, Jian Yi Gu
The first mix proportion of ordinary cement-stabilized gravel without fiber is as follows: Cement: gravel=6: 94, optimum moisture content is 5.3%; maximum dry density is 2.292g/cm3; aggregate gradation is medium coarse sand and natural gravel (maximum grain size is less than 3cm) =1:4.
When mixed with right volume content of polypropylene fiber in the cement-stabilized base material, the large number of uniformly distributed fiber in the base material can constraint the base material evenly, increase its resistance to freeze-thaw expansion pressure, and at last improve the freeze-thaw performance.
Online since: August 2013
Authors: Bei Gang Li, Qian Long Hu, Zhi Yan Fu, Chen Wang
In the material preparation, the number of the precursors crystal nuclei of zinc oxide were less at lower reaction temperature, and the particles in smaller diameters easily formed small aggregates at higher temperature.
This shows that the grain sizes grow up constantly, but nano-ZnO does not change the crystalline structure of FA in the composite.
Online since: October 2013
Authors: Yu Tao Li, Ke Hui Qiu, Yu Chong Qiu, Hui Zhong, Ning Jia Fu
The high purity and uniform grain size of tetragonal BaTiO3 powders were obtained processing at 200℃ for 48h by solvothermal method using TEA and DEA as polymer modifiers [11].
The using of DEA may promote the rapid formation of Ti(OH)x(4-x)+ and the absorption of Ba2+ or Ba(OH)+ in the solution and lead to an increase in the number of nucleation sites and a lower in the formation temperature of as-synthesized samples which benefits the formation of tetragonal BaTiO3.
Online since: November 2013
Authors: Chao Shi, Hong Bing Qiu, Yun Yi Wang
All nodes in the broadcasting domain of node is defined as the neighbor node set of node, which is denoted by .The number of set is defined the degree of node, which is denoted by .The average degree of nodes is denoted by.
Fine-grained network time synchronization using reference broadcasts[C]. 5th symposium on Operating Systems Design and Implementation, 2002:147-163
Online since: September 2013
Authors: Hana Hasnikova, Petr Kuklík
Analysis is normally done by measuring tree-ring width on the cross section (end grain) of a timber.
The relationships are created to evaluate the measurements, taking into account the number and location of holes. [4] Long experience shows high compliance, using the strength determined by Pilodyn with values determined by standardized destructive mechanical tests.
Online since: August 2015
Authors: Watcharee Rattanasakulthong, Patthamapun Boonprakom
The film thickness of the ZnO:Al films estimated from the SEM results were 86, 264, 289, 309 and 332 nm and clearly indicated that the film thickness directly increased with increasing sputtering power because the higher power of bombardment gave rise to a higher number and energy of scattered atoms deposited on substrate materials.
The Al2O3 phase cannot be detected because the aluminum atoms have substantially replaced zinc in the hexagonal lattice or segregated to the non-crystalline region in the grain boundary [3].
Online since: July 2015
Authors: Kai Ji He, Kai Ming Wang, Shu Cai Wang
More and more synthetic approaches of GaN powder and crystalline grain have been proposed with study gradually on condition, simple process and equipments.There have not been sufficient theoretical analysis and explanation, although the relevant conditions on the gas-solid reaction are researched in each papers.
Further, formation of a special peak at 20° probably in the XRD pattern was caused by lattice distortion that is doped by a certain number of nitrogen atoms into the structure of Ga2O3 in the course of active state.
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