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Online since: November 2015
Authors: Oliver Weichold, Moshe Puterman
Introduction
The pore system that penetrates the cement stone in mortars and concretes is the origin of a number of problems generally associated with such materials.
The concrete samples were prepared from a C 0.70 according to EN 1766 using 275 kg/m3 of CEM I 42.5 R and 1765 kg/m3 of a fine grained aggregate.
The former are approx. 10 times and the latter approx. 300 times weaker than charge-charge interactions [8], but the presence of a large number of HEMA molecules along the polymer chain, i.e. the cooperative effect, appears to provide in total a sufficiently large interfacial interaction to cause an increase in the mechanical parameters.
The concrete samples were prepared from a C 0.70 according to EN 1766 using 275 kg/m3 of CEM I 42.5 R and 1765 kg/m3 of a fine grained aggregate.
The former are approx. 10 times and the latter approx. 300 times weaker than charge-charge interactions [8], but the presence of a large number of HEMA molecules along the polymer chain, i.e. the cooperative effect, appears to provide in total a sufficiently large interfacial interaction to cause an increase in the mechanical parameters.
Numerical Simulation of Flow Field and Separation Efficiency of Inclined Cut-In Double-Inlet Cyclone
Online since: June 2012
Authors: Yong Yang, Cai Jin Wu, Zheng Fei Ma
The result of grid using grid generation software Gambit is shown in Fig. 1 and the grid number is about 250,000.
The requirement for the initial value is strict since the calculation of stress is necessary in Reynolds Stress equation Model (RSM), which increases the number of equations in calculation and difficulty of calculation convergence.
Li, et al., Study on performance of axial symmetry-inlet cyclone, Journal of Zhengzhou Grain College, 21 (2000) 34-37
The requirement for the initial value is strict since the calculation of stress is necessary in Reynolds Stress equation Model (RSM), which increases the number of equations in calculation and difficulty of calculation convergence.
Li, et al., Study on performance of axial symmetry-inlet cyclone, Journal of Zhengzhou Grain College, 21 (2000) 34-37
Online since: September 2020
Authors: Wei Feng, Xian Shuai Chen, Jin Yang Zhang, Xiao Zhang
The models presented a number of elements that ranged from 60072 to 116865 and a number of nodes that ranged from 123444 to 218045.
Mechanical and biological properties of the micro-/nano-grain functionally graded hydroxyapatite bioceramics for bone tissue engineering.
Mechanical and biological properties of the micro-/nano-grain functionally graded hydroxyapatite bioceramics for bone tissue engineering.
Online since: August 2015
Authors: A.S. Ramana, T.V. Ashokumaar, K. Vignesh
A correlation for Nusselt number and friction factor was developed by Singh et al. [14] and multiple arc shaped roughness geometry on absorber plate showed improved performance.
The k-ε turbulence model showed that maximum enhancement of average Nusselt number to be 2.86 times that of smooth duct.
Shanmugam and Natrajan [22] studied the possibility of using CaCl2 based solid desiccant for grain drying.
The k-ε turbulence model showed that maximum enhancement of average Nusselt number to be 2.86 times that of smooth duct.
Shanmugam and Natrajan [22] studied the possibility of using CaCl2 based solid desiccant for grain drying.
Online since: September 2013
Authors: Yan Wu, Yu Chuan Bai
Therefore, the transition probability of the movement from one event to a next event is obtained
(1)
Where is the number of event transition from situation at time to situationat time ; and is the number of events in situation in the series followed by another situations, so that
(2)
According to above definition, there are 64 movements in total during the bursting process at every measured point.
A model for the entrainment and transport of sediment grains of mixed sizes, shapes and dencities.
A model for the entrainment and transport of sediment grains of mixed sizes, shapes and dencities.
Online since: September 2014
Authors: Koichi Okuda, Yasunori Harada, Masayuki Nunobiki
Table 1 Vickers hardness of Fe-Al alloy[3]
laser
825 HV
30μm
434 HV
Al:30 HV
S45C: 175-240 HV
300μm
Fig.3 Cross section of the testpiece after laser processing
P = CW300W, r0 = 1.3mm, V = 5.0mm/s, Number of scan : 10times
In the periphery of laser irradiated area, thin alloy layer was observed in only the part of thin Al foil, though the alloy layer was not observed in the part of thick Al foil because heat flux is insufficient for laser alloying.
Fig.4 SEM image and the composition distruibutions of Fe, Al and C of the periphery of laser irradiated area in which S45C did not harden P = CW300W, r0 = 1.3mm, V = 5.0mm/s, Number of scan : 10times Laser surface alloying with high speed laser scanning.
Froyen, Recovery, recrystallization and grain growth in Fe3Al-based alloys, Intermetallics, Volume 10, Issue 5, (2002) pp.473-484
Fig.4 SEM image and the composition distruibutions of Fe, Al and C of the periphery of laser irradiated area in which S45C did not harden P = CW300W, r0 = 1.3mm, V = 5.0mm/s, Number of scan : 10times Laser surface alloying with high speed laser scanning.
Froyen, Recovery, recrystallization and grain growth in Fe3Al-based alloys, Intermetallics, Volume 10, Issue 5, (2002) pp.473-484
Online since: January 2014
Authors: Liang Yin, Zhe Li, Juan Chen, Xin Qi
Pulse number corresponding to value is obtained by sampling and preserved by MCU.
Serial number Actual thickness [mm] Result by TR technology [mm] Result by focusing technology [mm] 1 7.9 7.9 8.0 2 7.8 7.8 7.9 3 8.0 8.1 8.0 4 8.0 8.0 8.1 5 8.1 8.0 8.0 6 8.1 8.0 8.1 7 8.0 8.0 8.1 8 8.1 8.0 8.1 9 8.0 8.0 8.0 10 8.0 8.0 8.0 Conclusion The ultrasonic wheel probe takes silicone rubber as wheel skin.
Monchalin, Thickness and grain size monitoring in seamless tube-making process using laser ultrasonics, NDT&E International, 2006, vol.39, pp. 622–626
Serial number Actual thickness [mm] Result by TR technology [mm] Result by focusing technology [mm] 1 7.9 7.9 8.0 2 7.8 7.8 7.9 3 8.0 8.1 8.0 4 8.0 8.0 8.1 5 8.1 8.0 8.0 6 8.1 8.0 8.1 7 8.0 8.0 8.1 8 8.1 8.0 8.1 9 8.0 8.0 8.0 10 8.0 8.0 8.0 Conclusion The ultrasonic wheel probe takes silicone rubber as wheel skin.
Monchalin, Thickness and grain size monitoring in seamless tube-making process using laser ultrasonics, NDT&E International, 2006, vol.39, pp. 622–626
Online since: October 2012
Authors: Xiao Lei Zhang, Dong Po Sun, Li Da Zhang, Peng Tao Wang
At present, sea sand is the main source of incoming sediment the grain of incoming sediment from the sea is fine.
In the simulation of floods traveling on both nature and design conditions, the grid width is 10m, so the number of longitudinal nodes is 544 and the number of lateral nodes is 133,so there are totally 72,086 nodes.
In the simulation of floods traveling on both nature and design conditions, the grid width is 10m, so the number of longitudinal nodes is 544 and the number of lateral nodes is 133,so there are totally 72,086 nodes.
Online since: February 2014
Authors: Xi Wu Lu, Zhong Wei Wu
Poyang Lake area is the main production areas of grain and cotton of Jiangxi province, in which the use of chemical fertilizer quantity is up to 350,000 tons in 2008 [2].
As the situation worse of world financial crisis, the labor-intensive industries in the coastal export-oriented enterprise survival difficult, layoffs and even collapse, and caused large numbers of migrant workers returning home.
At the same time, the employment problem a large number of university graduates is also a big society problem.
As the situation worse of world financial crisis, the labor-intensive industries in the coastal export-oriented enterprise survival difficult, layoffs and even collapse, and caused large numbers of migrant workers returning home.
At the same time, the employment problem a large number of university graduates is also a big society problem.
Online since: April 2013
Authors: Roman E. Gladyshevskii, Tatyana L. Rakitskaya, Tatyana A. Kiose, Anna M. Zryutina, V.Ya. Volkova, Alla S. Truba, Vladimir O. Vasylechko, P.Yu. Demchenko, G.V. Gryschouk
Despite a great number of publications devoted to a problem of functionalizing the properties of bentonites and to their application in catalysis [1-3], there is an apparent absence of research on ways the structural and physicochemical properties of bentonites influence activity of ecologically purposed bentonite-based metal-complex catalysts for CO, O3, and SO2 mitigation at ambient temperature.
Catalyst grain size was 0.5-1.0 mm.
The CO conversion under the steady-state conditions (hst) and the number of catalytic cycles (n) per 1 mole of Pd(II) (QPd(II)) were calculated at the experiment end point by using the following formulas: ×100, %; (3) n = Qexp/QPd(II)
Catalyst grain size was 0.5-1.0 mm.
The CO conversion under the steady-state conditions (hst) and the number of catalytic cycles (n) per 1 mole of Pd(II) (QPd(II)) were calculated at the experiment end point by using the following formulas: ×100, %; (3) n = Qexp/QPd(II)