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Online since: August 2014
Authors: Shu Du, Wei Fu Peng, Fu Xiang Li
Freixenet et al first introduced the fusion of color and texture and proposed a color texture segmentation method which assumed that the significant factors of the two features are fixed in every segmentation, obviously, it is not much reasonable; J.
Zhao[2] et al introduced another model, an interactive image segmentation method via multi-cue dynamic integration was proposed, it also has a limitation since the label is the necessary conditions for image segmentation; Except color and texture cues, local brightness is also take into image segmentation[3].
Yang el at.
Frey et al in [6].
Frey el at in [6].
Online since: May 2016
Authors: Chung Seok Kim, Won Sik Kong, Sang Guy Park
In addition to the Al matrix, a large amount of coarsen eutectic Si, Al2Cu intermetallic phases and Fe-rich phases are identified.
Alloy Si Cu Fe Mn Mg Al AlSiCu 6.01 2.09 1.03 0.19 0.12 Bal.
In addition, many phases which are possible to be contrast and morphological distinguish were observed in Al matrix.
This is a major effect on the matrix strengthening resulting from the solution of Cu atoms into the Al matrix.
Phase Si Cu Fe Mn Al α 10.7 - 22.0 8.6 56.6 β 17.5 - 23.1 2.6 56.6 Si 93.6 - - - 6.3 θ - 51.3 - - 48.6 Table 4.
Online since: November 2012
Authors: Yeong Maw Hwang, Song Jeng Huang, Y.S. Huang
Ugandhar et al. [10] investigated the effects of heat treatment on the strength and ductility of AZ61/SiCp MMCs.
Chua et al. [11] discussed the influence of SiC particles on the mechanical properties of Mg Based composite with different sizes of SiC particles.
El-Morsy et al [12] tried to obtain grain refinement by hot extrusion and thermomechanical processing of large reduction rolling.
Poddar et al. [13] fabricated elemental Mg and Mg-alloy (AZ91D) based composites reinforced with 15 vol.% silicon carbide particles by stir casting technique.
El-Morsy, A.
Online since: July 2022
Authors: Ben Khadda Ben Ammar
., Etude des matériaux à base de bois de palmier dattier-durabilité, Dégradation et propriétés structurales et de transfert, Mémoire de magister, Faculté de technologie, Université El-Hadj lakhdar (Algérie), 2014
[2] BENMANSOUR, N., Etude des performances de produits renouvelables et locaux adaptés raux applications de l'isolation thermique dans le bâtiment, Mémoire de magister, Faculté des sciences, Université El Hadj Lakhdar (Algérie), 2011
Mo, et al., Green concrete partially comprised of farming waste residues: a review.
Claramunt, et al., The hornification of vegetable fibers to improve the durability of cement mortar composites, Cement and Concrete Composites, 33(5) (2011), pp. 586-595.10.1016/j.cemconcomp.2011.03.003
Abani, et al., Valorisation of Date Palm Fibres in Sahara Constructions.
Online since: May 2004
Authors: J.C. Labbe, Thierry Joyeux, J.P. Lecompte, Jean Jarrige
Figure 1. repartition of Cu Al O elements at the interface Cu/AlN of the assembly Figure 2 . copper stud with 8 µm thickness Cu2O at 1072°C during 3 mn.
The distribution of Al, Cu and O were determined by EDS (figure 1) showed that oxygen was present in a 8 µm thick layer.
For the assemblies obtained by the 0 20 40 60 80 100 -15 -10 -5 0 5 10 distance (µm) % atomic référence interface Al 2 O 3 /AlN assembly with strip assembly with sheet Cu % at Al % at O % at process developed during this study, a thermal resistance of contact of (1,6 ± 0.5) 10-6 m2.K/W was given.
[10] Joyeux T., El Ganaoui M., Lecompte J.
[11] Joyeux T., El Ganaoui M., Jarrige J., Labbe J.
Online since: January 2010
Authors: Yasunobu Nagataki, Yoshihiro Hosoya, Hiroshi Matsuda, Hisata Noro
The equation is derived from the empirical relationship proposed by Dyson et al. [15], as a0 = 0.3580 + 0.0033×[C] + 0.00095×[Mn] +0.0056×[Al] + 0.022×[N] , (1) where [C] is the mass carbon content in % of retained austenite.
C Si Mn Al Annealing Austempering A 0.1 1.10 1.65 0.04 820°C, 180s 400°C, 300s B 0.1 0.25 1.80 0.25 840°C, 180s 460°C, 90s Heat treatment Chemical compositions [mass%] Steel (b) Lath γ Blocky γ 5μm (a) Lath γ Blocky γ (b) Lath γ Blocky γ 5μm (b) Lath γ Blocky γ (b) Lath γ Blocky γ 5μm5μm (a) Lath γ Blocky γ (a) Lath γ Blocky γ Fig. 1 SEM micrographs of (a) steel A and (b) steel B.
El [%] U.
El [%] A 405 620 38.4 26.4 B 330 633 33.5 20.8 0 200 400 600 800 0.00 0.05 0.10 0.15 0.20 0.25 0.10 0.15 0.20 0.25 0.30 True stress σ / MPa True strain ε work-hardening exponent ninst ninst= εu Instantaneous Steel B Steel A Steel A Steel B Fig. 2 Stress-strain curves and change in work-hardening exponent during straining. 0.00 0.05 0.10 0.15 0.20 0 2 4 6 8 10 0.00 0.05 0.10 0.15 0.20 0.25 True strain ε Steel A retained austenite Vγ / vol.% Steel B Vγ total Image ana.
It is conceivable that the sharp increase in the ninst at a low strain region for the steel B is due to the fast transformation of retained austenite into martensite, as reported by Evans et al. [16] These results indicates that TRIP phenomena of the blocky austenite is little or no contribution for ductility because of its transformation in a low strain region, and that the effect of lath-shaped austenite is dominant.
Online since: September 2012
Authors: Wen Can Chen, Xiao Dong Liu
The large scale Restricted Floating Sensor (RFS) network is an important mod-el in offshore data collection [1].
Then Where Let Then we have The similarity measure based on this distance is: This is the similarity proposed by Hung et al..
Then Let , , Then we have The similarity measure based on this distance is: This is the similarity proposed by Liang et al.
Online since: March 2014
Authors: Da Hao Wang, Hui Ming Ji, Xiao Lei Li, Jian Wang, Hong Jun Feng
Gevorgian, E.L.
Banciu, et al., Barium strontium titanate-based perovskite materials for microwave applications, Prog.
Weil, et al.
Liu, et al., Effects of La2O3 additions on properties of Ba0.6Sr0.4TiO3-MgO ceramics for phase shifter applications, J.
Unsimäki, et al., Ba0.7Sr0.3TiO3 powders with B2O3 additive prepared by the sol-gel method for use as microwave material, Mater.
Online since: December 2014
Authors: A. Rama Krishna, K. Vijaya Lakshmi, Lanka Rasidhar, Ch. Srinivasa Rao
Sajjadi et al. [8] reported the enhanced mechanical properties of Al-Al2O3 micro and nanocomposites fabricated by stir casting method.
Characterization of nano powder and Al-nano composites.
It is also observed that small amount of porosity is present in the Al and Al-Ilmenite composites.
Prod of Al-20wt% Al2O3.
El-Kady, Materials Sciences and Applications, 2011, 02(05), 390-398
Online since: February 2012
Authors: Juan Hong Ren, Hui Chen, Qin Ma
(Mo,Cr)(Si,Al)2 phase has not found in alloys.
Fig.2 Partial X-ray diffraction patterns of the alloys With the further increase of AlCr2 molecular content,the diffraction peak of Mo(Si,Al)2 migrated to the left as shown in Fig.2,it shows that the solid solution alloy was formed.Because of the Al atom radius is greater than the Si atom radius,part of the Al atoms occupy the position of Si atoms in the Mo(Si,Al)2 alloy,causes the lattice constant and interplanar spacing of alloys increased,so the diffraction peak migrated to the left.
is higher than single crystal.But,(Mo,Cr)(Si,Al)2 was not found in this experiment.
MoSi2-AlCr2 quasibinary system alloys were prepared by hot pressed sintering,the main phase composition of alloys were MoSi2 and Mo(Si,Al)2,the crystal structure was gradually transformed from tetragonal C11b MoSi2 to hexagonal C40 Mo(Si,Al)2. 2.
(Mo,Cr)(Si,Al)2 phase has not found in alloys. 3.
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