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Online since: August 2012
Authors: Lin Zhang, Zhi Zhong Dong, Yong Chang Liu, Ya Peng Wang, Zhi Chao Liu, Kang Li, Hua Jiang
During 4h to 16h, the size of VC particles enlarged obviously both in the grains and along the boundaries.
It could be attributed to that a large number of fine VC precipitates emerge uniformly before 4h aging as seen in Fig.3 (a) and (b), this inevitably causes matrix homogenization in component content dropping, which directly lead to degradation of corrosion resistance.
After 4h, the number of VC precipitates increases tardily as shown in Fig.3 (b), (c) and (d), but the precipitates grow obviously.
Online since: November 2011
Authors: Eirini Varouti
The parameter counts refers to the number of Barkhausen Emission pulses.
The number of pulses depends on the threshold voltage which can be selected by user in order to obtain results giving the most comprehensive information about material and stress.
The ferritic grains boundaries are decorated with bainitic ferrite and, finally, islands of retained austenite could be observed.
Online since: January 2004
Authors: A.F. Gualtieri, M. Dapiaggi, D. Levy, E. Belluso
Given its outstanding properties, asbestos has been utilised since the ancient times for a large number of applications.
Although a number of papers in the literature deal with the thermal transformation of amphibole minerals, they mainly describe the oxidation and related dehydrogenation and dehydroxylation reactions but none reports the kinetics of the decomposition reaction.
Further TEM investigations are necessary to confirm the proposed reaction mechanism and to help to clear the follwong issues: (1) the nucleation and growth of hematite: does it occur at the surface, grain (fibril) boundaries and/or in correspondence to structure defects?
Online since: November 2013
Authors: Md Akil Hazizan, Nosbi Norlin
Introduction Carbon nanotubes (CNTs) have a unique structure of the rolled graphene sheets shape with a large number of hilicities and chiralities of graphene sheet rolled up like a scroll [1].
The catalyst was grained small before calcined in oven at 900ºC for 10 hours.
Fourier transform infrared (FTIR) spectra of the samples were performed in a scan range wave number of 4000-500 cm-1 with a resolution of 2 cm-1 at room temperature.
Online since: June 2011
Authors: Dong He, Hong Zhang
According to this result, may forecast our country 2012 the soybean import degree of dependency is 58.805%, in the heavy police police region, the front computed result is basic consistent. 3 This article discussed the Chinese soybean market import degree of dependency In this paper, the production status of domestic soybean is analyzed.The reeently change cases such as the unit production, the planting area and the total produetion of domestie soybean, are illustrated and the planting cires change of the soybean indomestic main soybean produce zone is analyzed.On this base, the foreeast model of the BPNN about the total produetion of the soybean is built and the optimization analysis method of the degree of grey assoeiation is used when selecting the number of the hidden nodes of the NN.The status of the supply and demand of domestic soybean is analyzed.The recently change cases such as the supply quantum,the import quantum and the demand quantum, are illustrated associated with
Note: Heilongjiang Province education department science and technology financing projects, Project number: 11531259 References: [1] Back T.
,A.Aguilera,and S.P.Nissanka.Grain yield is reduced more by weed interference in an old than in a new maize hybrid.Agron.J. (2007) , p. 89:239–246 [3] G.
Online since: February 2012
Authors: Gao Ming He, Mei Wang
Parallel distributed structure Distributed structure The distribute parallel processing system to distribute structure, we can see, adoption Parallel processing the type imbed the advantage of system processing sketch technique and traditional share total line system like bottom: The structure:The structure of the traditional share total line system has several processing units together and uses one set according to the total line, the address segment taken up by saving machine is same in each number signal processing, while the distribute type Parallel processing the structure of system, each processing unit from independent data saving machine, pass a correspondence to connect with each other.
Characteristics:The traditional share total line system connects structure simple, when the number of the digital signal processor less, can attain high acceleration compare;When handling unit piece is more, sharing the total line will result in multifarious total line conflict and wait for.The distribute type Parallel processing system as long as handle the scale increase, the processing ability of the system become proportion of increment, suit to constitute large-scale Parallel processing system.
Structure parallel algorithm model Based on the embedded system in image processing with the traditional image processing technology compared to have their own characteristics: the parallel algorithm in the image processing of fine-grained, and has a large communication capacity, information content, can be divided into blocks, and distributed and parallel structure have public memory, greatly improves the response time.
Online since: July 2014
Authors: Ji Wang, Yan Fei Wang, Jian Fei Liu, Xue Mei Zong
Grain boundary is also clear and no corrosion micro-pits on the surface of the polished specimen.
After 10 minutes polishing, the mass percentage and atomic number percentage of Cr increase slightly, but the percentage of other chemical elements almost remains unchanged.
(3) The mass percentage and atomic number percentage of Cr increase slightly
Online since: December 2012
Authors: Joydeep Roy, Subhash Chandra Saha, John Deb Barma
Here Do is the overall desirability value, di is the individual desirability value of ith quality characteristic and n is the total number of responses.
Flux used in this experiment is fused type with grain size 0.2 to 1.6 mm with basicity index 1.6 and the chemical composition is SiO2 + TiO2 =30%, CaO + MgO =10%, Al2O3 + MnO= 45%, CaF2= 15%.
(8) Here ‘n’ is the number of measurements, and yi the measured ith characteristic value.
Online since: October 2009
Authors: Ivo Černý, Dagmar Mikulová
Water jet contained abrasive particles of natural garnet of grain size 150 - 300 µm, pressure 3800 bar, nozzle diameter 1.02 mm.
Fig.2: Fatigue S-N curve of Al-alloy with milled and WJM surface Fig.3: Fatigue S-N curve of AISI 4340 steel with ground and WJM surface 400 450 500 550 600 650 700 750 800 10000 100000 1000000 10000000 100000000 Number of cycles Stress range (MPa) Ground surface Water jet impact Water jet outfall 200 220 240 260 280 300 320 340 360 380 10000 100000 1000000 10000000 100000000 Number of cycles Stress range (MPa) Water jet impact Center Jet outfall Milled Regression - water Impact Regression - center Regression - jet outfall 0.15 mmAnalyses of fatigue cracking mechanisms.
Online since: January 2007
Authors: Sang Heon Lee
The key point in increasing Jc is improving weak link properties of grain boundary and trapping of magnetic field by non superconducting phase in a superconducting matrix.
Thus doping of CeO2 increases the normal conduction region, the number of flux pinning centers and critical current, however the result indicates deteriorate effect on the magnetic shielding.
The result indicates that ∆M is propotional to the number of magnetic flux lines passing through the sample.
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