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Online since: November 2007
Authors: S.M. Zhang, T. Lin, L. Zhang, Y.H. Liu, Y.H. Xue, J. Li
MTT test was applied to quantitatively assess the number of viable cells attached and grown on the scaffolds.
Nano-HA, with an average grain of less than 100nm, was obtained from our lab.
Online since: August 2012
Authors: Li Jun Wang, Qiang Gui
If the ratio of the linear growth of crystal nucleus and the number of nucleation in unit time and volume don’t change with overheating when the amorphous alloys crystallize over the critical crystallization temperature T0, in the process of phase transition, growth and diffusion mechanism are obeyed.
(1) G: linear growth rate of crystal nucleus; N: the number of nucleation in unit time and volume; : the amount of formed grain; : heating rate; t: overheating- difference between critical equilibrium phase transition temperature and actual phase transition temperature.
Fig.2 DSC curves of imported amorphous ribbons Fig.3 DSC curves of domestic amorphous ribbons In the process of diffusible solid phase transition, both the linear growth rate of crystal nucleus and the number of nucleation increase with the temperature.
Online since: November 2010
Authors: Yan Ping Yao, Chun Ling Liu, Hai Dong Qi, Xi Chang, Chun Wu Wang
This result indicates that hydrogen is doped in a-InAsSb thin film as interstitial atoms and promotes reuniting of crystal grains while sputtering.
There are two strong and broad bands at the wave number of 1100cm-1 and 1460cm-1as shown in Fig. 2.
Moreover we propose that the increase of dark conductivity and decrease of photo-sensitivity are due to an increase of the number of distorted and broken bonds in the interface between the c-InAsSb clusters and the amorphous matrix.
Moreover increase of dark conductivity and decreases of photo-sensitivity because of an increase of the number of distorted and broken bonds in the interface between the c-InAsSb clusters and the amorphous matrix.
Online since: May 2011
Authors: Mei Xiong
Table 1 Quality index measurement of coarse aggregate The coarse aggregate gradation Crushing index Elongated and flaky particles content Mud content Accordance with continuous grain composition requirement between 5~25mm 13.6 per. 4.9 per. 0.8 per.
Table 4 Mechanical property test mix proportion Number Coarse aggregate/kg Water addition/kg Base material/kg Water /Base material 1 15 13 100 0.13 2 25 13 100 0.13 3 15 14 100 0.14 4 25 14 100 0.14 5 15 15 100 0.15 6 25 15 100 0.15 We use a special small-sized mixer to mix DSCC mixing materia[6], the feeding sequence like this: mixing base material and coarse aggregate uniformly first, adding water, continuing stirring until the mixture materials uniformly, stirring for 3~5min, putting the mixing materias into the square steel mould with 150mm side length.
Table 5 The compressive strength and cleavage strength test results of DSCC Number Apparent density (kg/m3) fcu /MPa σfcu /MPa δfcu /MPa fsp /MPa σfsp /MPa δfsp /MPa fsp/fcu 1 2 156 53.3 4.57 8.52 4.95 0.40 8.41 0.093 2 2 309 57.3 5.15 9.01 5.41 0.48 9.46 0.094 3 2 316 56.0 4.72 8.28 5.48 0.35 8.11 0.098 4 2 345 55.8 4.61 8.42 5.16 0.35 8.63 0.092 5 2 295 42.8 3.65 8.61 4.36 0.42 8.11 0.102 6 2 307 43.2 4.00 9.33 4.19 0.43 9.50 0.097 Anti-carbonization experimental study on the performance of DSCC Test method.
Table 6 Anti-carbonization ability of concrete measuring data results(mm) Number 3d 7d 14d 28d GB15 3.4 4.7 4.9 6.1 GB25 3.7 5.1 6.3 6.6 PT 4.6 6.7 8.5 9.1 Injection.
Online since: November 2014
Authors: Xin Gang Yu, Lu Hu, Chao Gao, Guo Lin Wu
Introduction Foam concrete refers to a concrete building material which contains a large number of pores, and has the advantages of fire resistance, heat insulation, sound insulation, seismic resistance and light-weight.
Table 1 Properties of cement Fineness (%) Standard consistency (%) The initial setting time The final setting time Stability (Pat method) Compressive strength (MPa) Flexural strength (MPa) Heat of hydration (kJ/kg) 3d 28d 3d 28d 3d 28d 0.4 28.1 185min 240min No crack 23.9 46.7 3.8 6.8 246 279 Table 2 Chemical composition of cement (%) SiO2 Fe2O3 Al2O3 CaO MgO SO3 Total alkali content Loss on ignition 22.04 2.65 6.29 58.99 2.53 2.47 0.72 3.06 Table 3 Brief introduction of the pulverized limestone Place of Origin Specific surface area cm2/g The content of available CaCO3 Chongqing 210 >99% 290 440 Table 4 Content of the foam concrete mixture Composition Cement /kg Water /kg Limestone /kg Foam /M3 Calcium chloride /kg Content 450 180 0 0.68 2.25 Table 5 Designed mixture ratio for different fineness of the limestone  Number Cement /kg Water /kg Limestone /kg Foam /M3 The fineness of limestone cm2/g Calcium chloride /kg 1 360 180 90 0.64 210 2.25 2 360 180 90 0.64 290
2.25 3 360 180 90 0.64 440 2.25 Table 6 Designed mixture ratio for different limestone and foam Number Cement /Kg Water /Kg Limestone /Kg Foam /M3 Calcium chloride /Kg 1 450 180 0 0.68 2.25 2 427.5 180 22.5 0.68 2.25 3 405 180 45 0.67 2.25 4 382.5 180 67.5 0.66 2.25 5 360 180 90 0.64 2.25 6 337.5 180 112.5 0.63 2.25 7 315 180 135 0.625 2.25 8 292.5 180 157.5 0.62 2.25 Test equipment.
At the same time, it has good filling effect, due to that the limestone powder has fine grains, which can fill in the crystal interface transition zone of cement stone and form a compact wall of the foam concrete, then the strength of the foam concrete increases.
Online since: November 2014
Authors: Wen Xi Duan
Under normal circumstances, the value of the proportional coefficient is a positive number.
Regression Forecasting.Suppose the number of ( ) was about the data recorded the planting quantity and profit of industrial crops in some area many years ago, and they are distribute around a straight line, the function relation between the total profit in this year and the planting total in next year is found using the linear regression method.
If the number of ( ) don’t distribute around a straight line, the method of the variable replacement can be used to transform the nonlinear function into the linear function relation.
The farmers are eager to sell their grain in order to reduce their loss and stored cost, speed up their funds turnover on the conditions of supply and demand in rural industrial crops.
Online since: September 2013
Authors: Yan Wei Liu, Xiao Ping Han, Yu Long Jing
Experiment with grain-size distribution and specific gravity test, were carry on to calculate soil textural classes and soil hydraulic characteristic.
Minimizing the number of compartments will decrease calculation time, and might increase the mass balance error.
For each soil layer, the bottom compartment number is defined.
The soil layers are numbered from top to bottom (the first soil layer is 0-60 cm, the second soil layer is 60-120cm, the third soil layers is 120-260 cm).
Online since: December 2012
Authors: Hai Min Su, Dong Sheng Xu
Sixian City is located in Anhui Province northeast, Tuo River, Xinbian River, old Sui River flowing through the territory and climate resources superior, convenient transportation, Sixian District is the country 's important commodity grain production base.
At the same time, soil heavy metal pollution is increasingly prominent because of a large number of waste, emissions and the extensive use of pesticides and chemical fertilizers.
Studies have shown that the vehicle fuel combustion will produce a large number of Pb and use of automotive lubricants, metal parts and tire wear will result in a large number containing Cu and Zn dust, so we can say Cu, Zn and Pb may be derived from the traffic pollution.
Online since: September 2013
Authors: Sheng Zhi Yang, Zai Qiang Zhang, Yan Li, Xiao Tong Wang, Xiu Li Hou, Yi Ping Lv, Qing Feng Guan
As a result, abundant metastable surface microstructures or phase structures, such as supersaturated solid solution [1], ultra-fine grain [3] and nanostructures [5] are formed within the irradiated surface layer.
Compared with Fig. 1 (a) and 1 (b), one can see that the number density of craters of 5-pulsed sample is obviously higher than that of 10-pulsed sample, indicating that the number density of craters decreases with the pulses increase.
The number density of craters of 5-pulsed sample is obviously higher than that of 10-pulses.
Online since: August 2015
Authors: Stefanie Reese, Marek Fassin, Stephan Wulfinghoff
The convergence behavior of the two algorithms is studied and compared regarding the number of time steps.
In order to compare the two time integration algorithms a study of convergence regarding the number of time steps was carried out.
Fig. 3: Convergence behavior for the two time integration algorithms with respect to the number of time steps.
Moreover it showed up, that already for a small number of time steps satisfying results were obtained for both solution algorithms.
A gradient plasticity grain boundary yield theory.
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