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Online since: May 2011
Authors: Jin Yang Lin, Li An Ma, Li Qin Hu, Yun Ye, Tai Liang Guo
SnO2 nanostructures including nanowies, nanotube, and nanodiskettes have been synthesized successfully by evaporating SnO2 or SnO powders and by carbothermal reduction of a mixture of SnO2 and carbon powder under different conditions [16-18].
All the strong reflection peaks of the XRD pattern can be readily indexed to tetragonal rutile structure SnO2 with the lattice constants of a=b=0.443 nm and c=0.372 nm, which correspond with the data of SnO2 powders recorded in the JCPDS document (Powder Diffraction File Compiled by the Joint Committee on Powder Diffraction, 1985, Card No. 03-1116).
All the strong reflection peaks of the XRD pattern can be readily indexed to tetragonal rutile structure SnO2 with the lattice constants of a=b=0.443 nm and c=0.372 nm, which correspond with the data of SnO2 powders recorded in the JCPDS document (Powder Diffraction File Compiled by the Joint Committee on Powder Diffraction, 1985, Card No. 03-1116).
Online since: January 2012
Authors: Li Hua Zhao
(1) 20˚C cotton fiber AC-16C (2) 20˚C no fiber AC-16 C
Fig.2 Origin fit Time-Hardening mode
Tab1 Index of time-hardening model
Specimens type
Temperature(˚C)
C1/10-4
C2
C3
Fitting Correlation coefficient
No fiber
20
1.77
0.47
0.46
98.87%
Mineral cotton fiber
1.03
0.65
0.54
99.46%
Finite element grid partition and unit selection
Global seed method is employed in finite element grid partition, choose 20 nodes of secondary reduction hexahedron units C3D20R.
Data processing and viscoelastic computation for creep test of asphalt mixture [J].Journal of Southeast University:Natural Science Edition,2007, 37(6): 1091-1095
Data processing and viscoelastic computation for creep test of asphalt mixture [J].Journal of Southeast University:Natural Science Edition,2007, 37(6): 1091-1095
Detection of Damage Extension in Cantilever Beams Using Change Ratio of Frequency Response Functions
Online since: February 2011
Authors: Hai Lei Jia, Yin Zhao
Among these features, the most fundamental one is the FRF, from which the other damage indices are yielded with some reduction of damage information.
Fig. 1 Data collecting system Fig. 2 Set-up for testing Fig. 3 FRF before denoising Fig. 4 FRF after denoising Detection of Damage Extension A sequence of FRF change ratioare used to depict extension of a crack.
Fig. 1 Data collecting system Fig. 2 Set-up for testing Fig. 3 FRF before denoising Fig. 4 FRF after denoising Detection of Damage Extension A sequence of FRF change ratioare used to depict extension of a crack.
Online since: June 2012
Authors: Xiao Zhong Pan, Jian Xie
Introduction
Digital image forensic technology is a passive blind analysis technique directly using digital image data itself to do authentication and differentiation.
And we treat all of the images with noise reduction processing to decrease the image noise’s interference on the experiment results.
And we treat all of the images with noise reduction processing to decrease the image noise’s interference on the experiment results.
Online since: October 2012
Authors: Zong Yao Lv
Assuming only two regions A and B, where region A compared to region B has the advantages of agglomeration economies in the industry outside and the scale economies of within the industry, the package of products on the market is producted in the region A ; the raw materials and energy of production is come from the region B in which through the sale of energy and mineral and other raw materials in exchange for the production and consumption data of region A.
It is easy to calculate that the change of industrial layout can be saved them quantity of traffic: unite (in which m>1) Brought about carbon dioxide emission reduction: (which is carbon emission factor of per unit of traffic).
It is easy to calculate that the change of industrial layout can be saved them quantity of traffic: unite (in which m>1) Brought about carbon dioxide emission reduction: (which is carbon emission factor of per unit of traffic).
Online since: October 2005
Authors: B.H. Lee, S.C. Kim, C.H. Lee
-0.06
-0.03
0.00
0
30
60
90
120
150
180
210
240
270
300
330
-0.06
-0.03
0.00
D
B
C
A
∆∆∆∆R [mm]
A : F=1750
B : F=1250
C : F=750
D : F=250
Fig. 1 Radius reduction volume according to change of feed rate
Evaluation Criteria for Circular Interpolation Accuracy
Radial Deviation.
Fig. 3 Structure of grid encoder Fig. 4 Schematic diagram of grid encoder system Measurement Tests and Results Figure 5 and Fig. 6 show the measured and analyzed error data and the results of error diagnosis, after performing the circular interpolation moving accuracy tests with diameter of 100mm and moving speed of 1500mm/min.
Fig. 3 Structure of grid encoder Fig. 4 Schematic diagram of grid encoder system Measurement Tests and Results Figure 5 and Fig. 6 show the measured and analyzed error data and the results of error diagnosis, after performing the circular interpolation moving accuracy tests with diameter of 100mm and moving speed of 1500mm/min.
Online since: August 2011
Authors: Bao Tong Huang, Hua Zhou, Huai Xiang Ding
It is believed that nitrogen fertilizer could stimulate the release of H+ from soil and the Ca2-P would be dissolved easily and then absorbed by crops[5].Additionally, the increased crop yield caused by fertilization could lead to large output of P resulting in reduction of soil Ca2-P.To the contrary, the Ca2-P contents increased by 86.6% (NP), 241.5% (NP+M), 18.1% (NPK) and 59.7% (NPK+M) respectively after 15-year cultivation.
In addition, the order of P harvested from crop was as follows (data not shown): NPK+M (62.17 kg hm-2)>NP+M (58.62 kg hm-2)>NPK (54.91 kg hm-2)>NP (41.08 kg hm-2).
In addition, the order of P harvested from crop was as follows (data not shown): NPK+M (62.17 kg hm-2)>NP+M (58.62 kg hm-2)>NPK (54.91 kg hm-2)>NP (41.08 kg hm-2).
Online since: November 2012
Authors: Wen Ying Su, De Ping Liu
In domestic and foreign, because the technical data lacks, the engineers and technicians must carry on the exploration and use trial and error methods to solution project question frequently [1].
The cold roll forming process has no welding seam, makes the entire primary beam welding defect reduction, so as to improve the quality of the main beam
The cold roll forming process has no welding seam, makes the entire primary beam welding defect reduction, so as to improve the quality of the main beam
Online since: September 2011
Authors: Alan Plumtree, M. M. Mirzazadeh
Chemical Composition %
C
Mn
S
P
Si
Cu
Cr
Mo
Ni
V
AISI 1141
0.39
1.41
0.12
0.01
0.24
0.05
0.1
0.01
0.03
0.06
AISI 1151
0.51
0.85
0.11
0.04
-
-
-
-
-
-
PF
0.50
0.31
0.12
-
-
3.06
-
-
-
-
C70S6
0.72
0.5
0.065
0.009
0.22
-
0.061
-
-
0.04
Table 2.Mechanical properties
Material
Yield Strength (MPa)
Tensile Strength (MPa)
Elongation (%)
Reduction of Area (%)
AISI 1141
575.7
855.0
17.0
39.0
AISI 1151
930.8
999.8
12.0
31.0
PF
565.4
889.5
15.0
30.0
C70S6
575.7
1006.7
13.0
27.0
The specimens were machined with a gauge section of 62 mm x17mm x 2mm and a generous 22mm shoulder radius.
Their model was substantiated by experimental data.
Their model was substantiated by experimental data.