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Online since: July 2005
Authors: Liang Tao Xiao, Qin Luo, Qing Dong
(2)
Where Mg-Si-O is mainly accumulated onto the surface of oxidization layer, it has large and
hard grain, thus the membrane surface is relatively coarse.
However, due to limited number of severe sparking, the discharge is not so even, thus the roughness on surface of membrane is relatively high.
However, due to limited number of severe sparking, the discharge is not so even, thus the roughness on surface of membrane is relatively high.
Online since: September 2011
Authors: Zhi Jun Xu, Guo Rong Li, Rui Qing Chu, Yong Liu, Qian Chen, Ming Li Chen, Xiu Hui Wang, Chun Jiao Ran
In this notation, A represents a mono-, bi- or trivalent ion, B denotes a tetra-, penta- or hexavalent ion, and m is the number of BO6 octahedral in each pseudo-perovskite block (m = 1–5) [7].
The grain growth in the samples was found to be strongly anisotropic and plate-like, which is characteristic of BLSF ceramics [13,14].
The grain growth in the samples was found to be strongly anisotropic and plate-like, which is characteristic of BLSF ceramics [13,14].
Online since: October 2011
Authors: Li Na Han, Juan Xiong
To solve this problem, the surface modeling technology of CAD/CAM has been used and solved it.
2.1 Theory of modeling parts with freeform surfaces
(1) The expression of the freeform curve
A freeform curve is a curve with no specified shape; it can’t be described as a straight line, a circular arc or a second conical section, but can be only described as a certain numbers of discrete points. [2]In practical use, the curve is always built by mathematical algorithm since the particle array, the trend of the array, and the join condition have been given, it gets through or close to the specified mass points.
It can be built by sweeping, also can be made of curve grid or the curve, even by creating the straight grain surfaces. [7-9]Usually on the basis of the appearance requirement, we can establish the boundary curves or build the curves according to the sample measurement data points for the surface, then establish the surface by the surface built methods of UG.
It can be built by sweeping, also can be made of curve grid or the curve, even by creating the straight grain surfaces. [7-9]Usually on the basis of the appearance requirement, we can establish the boundary curves or build the curves according to the sample measurement data points for the surface, then establish the surface by the surface built methods of UG.
Online since: January 2005
Authors: Hui Bin Xu, Yue Ma, Li Ming Yu, Chungen Zhou
If the interface
adhesion tends to an ameliorative state, the number and the intensity of the interface slip would be
reduced; and the same reason would make the interface relaxation effects occur in higher
Fig.3 Temperature dependence of Q
-1 in the
EB-PVD NiCrAlY coated samples and the
substrate.
Different to usual interface relaxation, such as the grain boundary relaxation, no obvious modulus soften effects [13] appears in modulus-temperature curve.
Different to usual interface relaxation, such as the grain boundary relaxation, no obvious modulus soften effects [13] appears in modulus-temperature curve.
Online since: September 2011
Authors: Ai Bing Yu, Xin Li Tian, Zhao Li, Xiu Jian Tang, Hao Wang
The size number of SiC grains was 180#, 240#, 320# and 500#, respectively.
Online since: August 2013
Authors: Ying Da Lv, Hai Peng Chen, Xuan Jing Shen, Xiang Li
Step4: Return to Step3, until the number of elements in S reaches k.
5 fixations are extracted using conspicuous edge positioning method as shown in Fig4.
Fast, automatic and fine-grained tampered JPEG image detection via DCT coefficient analysis[J].
Fast, automatic and fine-grained tampered JPEG image detection via DCT coefficient analysis[J].
Online since: June 2012
Authors: Bo Dong, Chong Hai Wang, Da Qian Chen, Xiao Feng Duan, Fang Gao, P. Zhai
Introduction
Porous ceramics, sintered at high temperatures with a large number of internal or closed pores connected to each other, rely on the pore structure and the material itself to achieve the desired functionality.
The carbon fibers mentioned in this study are high-strength, with low graphitization degree and preparation temperature, and in the edge of the grain boundaries there are a lot of active points which are prone to reactions and cause the mechanical properties of fiber to attenuate seriously.
The carbon fibers mentioned in this study are high-strength, with low graphitization degree and preparation temperature, and in the edge of the grain boundaries there are a lot of active points which are prone to reactions and cause the mechanical properties of fiber to attenuate seriously.
Online since: September 2014
Authors: Hui Xin Dai, Hong Jun Wang, Wei Lin Yang
Optional iron mainly in the form of magnetic iron content of 6.32%, its share of 36.94%, followed by hematite, limonite, content was 2.87%, and its share of 16.77%; iron silicate minerals content of 6.73%, 39.33% of the total iron content; while a small amount of iron to form iron carbonate and iron sulfide present, the amount of 0.26%, 1.52% of the total iron content.
1.2 Sample size analysis
Table 3 Iron distribution in each grain
Sizefraction
(mm)
Productivity(%)
Accumulation of positive Productivity(%)
Accumulation of negative Productivity
(%)
Grade
(Fe%)
Distribution rate(Fe%)
+0.5
2.59
2.59
100.00
9.21
1.36
-0.5+0.3
15.05
17.64
97.41
9.37
8.04
-0.3+0.165
13.47
31.11
82.36
10.25
7.88
-0.165+0.074
26.38
57.49
68.89
15.20
22.87
-0.074+0.047
8.74
66.23
42.51
22.09
11.01
-0.047
33.77
100.00
33.77
25.35
48.84
Total
100.00
17.53
100.00
Table 3 shows the results of particle size sieve analysis, processing recycled objects mainly enriched in iron -0.047mm level, up 25.35 percent
Research shows that lost to tailings iron minerals are mainly of two parts, one part is not a large number of coarse particles monomer dissociation, and the other part is fine iron particles over crushed minerals produced. 2 Experiments Through the properties of iron ore tailings in Yunnan shows: coarser ore, mineral composition is relatively complex, as many as a dozen have been identified mineral species, useful minerals are mainly magnetite (partial oxidation of martite ), hematite, limonite.
Research shows that lost to tailings iron minerals are mainly of two parts, one part is not a large number of coarse particles monomer dissociation, and the other part is fine iron particles over crushed minerals produced. 2 Experiments Through the properties of iron ore tailings in Yunnan shows: coarser ore, mineral composition is relatively complex, as many as a dozen have been identified mineral species, useful minerals are mainly magnetite (partial oxidation of martite ), hematite, limonite.
Online since: October 2010
Authors: Zong Wei Niu, Zhi Yong Li, F.F. Wang, Jia You Zhang, Ai Hong Wang
The influence mechanisms of ultrasonic vibration to hot-dip
aluminizing include cavitation effect and current effect which can lead to minuteness of crystal grain,
gas elimination and homogenizing of organization.
(Subject number: 2007BSB01502) References [1] D.H.
(Subject number: 2007BSB01502) References [1] D.H.
Online since: September 2013
Authors: Virginia Dinca, Rodica Vladoiu, Aurelia Mandes, Gabriel Prodan
Legend:
[1] TVA gun – cathode
[2] Crucible
[3] Material to be evaporated
(C, Mg grains)
[4] Substrates (Si and glass)
[5] Thickness monitor
Fig. 1 The schematic view of the experimental set-up
The main experimental parameters involved in this study are:
If- the current intensity of the heating filament;
Ua- the applied voltage;
Ia- the arc’s current intensity;
d- the distance between samples and the point of the ignition of the discharge;
p-the pressure;
tdep- the deposition time;
φ- the cathode-anode relative position between a perpendicular line on the crucible centre and the electron gun axis.
Acknowledgment This work was supported by a grant of the Romanian National Authority for Scientific Research, CNDI–UEFISCDI, project number 160/2012, PN-II-PT-PCCA-2011-3.2-1453.
Acknowledgment This work was supported by a grant of the Romanian National Authority for Scientific Research, CNDI–UEFISCDI, project number 160/2012, PN-II-PT-PCCA-2011-3.2-1453.