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Online since: January 2012
Authors: Ho Sung Lee, Joon Tae Yoo, Jong Hoon Yoon
Since the early demonstration of bulging of superplastic Zn-Al eutectoid alloy using a small air pressure [1], a number of mathematical analyses were reported to predict biaxial bulging behavior [2,3].
Results and Discussion The average grain size of the sheet received is 15micron.
Online since: February 2008
Authors: Qing Rui Yin, Guo Rong Li, Rui Qing Chu, Zhi Jun Xu
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=1,2,3,4,5) [2].
The platelike morphology of the SBT7 ceramic grains was observed.
Online since: October 2013
Authors: Yi Tang Zhou, Li He, Jie Zhou, Xi Zhong
Data sources Model is based on a large number of experimental data, especially the variable test data from Yasin(1998) [2] and Yasin Tatsuoka(2000) [3], who had done many stress path [6] of saturated close-grained Toyoura sand drainage tests along with a series of accurate stress testing [7] in geotechnical engineering laboratory at the university of Tokyo.
Online since: February 2014
Authors: Hai Cheng Xu, Hong Jun Luo, Jin Wei Fu
The required security capabilities require that we are able at run-time to take decisions about the types of services interacting, the current context and the security policies from a number of different domains.
Semantic Web technologies are currently the only viable option for enabling us to perform such reasoning, since they allow for a more fine-grained description and reasoning over the relevant issues in a manner that could also address the challenges placed by the open and heterogeneous nature of the service-oriented environment envisioned.
Online since: December 2012
Authors: Jun Deng, Shui Wen Zhu, Guo Ping Chen
Models with crystal plasticity require detailed information about the deformation mechanisms and texture taking into account the crystallographic orientation of individual grains, thus needing unreasonable computational time for simulations at structural level.
If the number of elements were increased, the results would be much better.
Online since: August 2020
Authors: Fedor L. Kapustin, Andrey Vishnevsky
The chemical-mineral and grain composition data, properties and their correspondence to Russian Standard 25818 in order to use ash in the production of concrete and products based on it are presented.
The environmental safety, chemical composition, content of combustibles and free calcium oxide, the grain composition and specific surface area are the main characteristics for assessment of possibility of ash using in concrete production.
It is known that the addition of gypsum stone accelerates the interaction of Ca(OH)2 and silica resulting in an increasing of number of low-basic calcium hydrosilicates and increases the strength of cement stone [6].
Online since: June 2012
Authors: Zhi Hua Diao, Yin Mao Song, Huan Wang, Yun Peng Wang
Recently, an increasingly number of segmentation algorithms based on regions has been proposed.
Such as, train large number of samples, the number of clusters relates to content of images, and it is prone to insufficient segmentation and oversegmentation.
The optimal cluster number and the degree of fuzziness of FCM were chosen through cluster validity and experiments respectively.
Zhou Long proposed a detection model of pests in stored grain based on image recognition.
Thirdly, an increasing number of specialists inclined to the specified theories rather than the classical algorithms to cope with the problem of image segmentation of disease spot.
Online since: February 2016
Authors: Svetlana Porobova, Vladimir Klopotov, Аnatoliy A. Klopotov, Lyudmila Trishkina, Viktor A. Vlasov, Yurii A. Abzaev
A thermodynamic probability of statistical systems is closely connected to the number of formations.
The dislocation structure (DS) in solid Cu-Al solutions is implemented by a large number of methods allowing to distribute dislocations depending on the strain degree.
The average grain size in the alloys was equal to 60 microns.
The number of possible distances coincides with permutations N!.
The total number of distinguishable configurations of the arrangement of neighboring dislocations equals to .
Online since: February 2011
Authors: Xin Gui Zhang, Ou Ou, Nian Ping Yi
At present the liquid soil stabilizers, which have application in either a number of subgrades and subbase in high class highway and pavement in low class highway or rural road, bring about a striking effect.
L-soil is grey hard in its natural state, and W-soil is earth-yellow hard-plastic .a summary of the two soil properties determined in laboratory are presented in Table 1.As shown in Table 1 ,the fine grained content of two soil are more than 50%.meanwhile,it is presented in Table 2 that the clay content(less than 0.002mm) of L -soil is 10%,and that of W-soil is 13%.The sum of SiO2 and Al2O3 in the two soil composition are more than 75% of the gross sample weight, and the ratio of SiO2 and Al2O3 is nearly equal to 2.It is shown that there are more quartz clast and enriched silicoaluminate clay minerals in two types of soils.moreover,the free swelling rate of the two soils are more than 40% and the liquid limits are greater than 50%.
Table 1 The Basic Soil Properties Sample number Atterberg Limits Specific Gravity Compaction Gradation (%) Swelling Rate (%) Named PL (%) LL (%) PI OMC (%) MOD (g/cm3) < 0.005 < 0.002 By PI By Plasticity Chart L-soil 27.3 50.9 23.6 2.76 21.1 16.5 45 10 58.5 clay CH W -soil 35.8 61.5 25.7 2.76 23.5 15.6 34 13 46.5 clay MH Table 2 The Soil Chemical Composition & Clay Minerals Sample number Chemical Composition CEC (cmol/kg) PH Clay Minerals (qualitatively) SiO2 Al2O3 Fe2O3 CaO MgO K2O Na2O Major Minor Micro L-soil 51.12 26.14 7.72 1.28 0.43 2.52 0.59 95.61 7.78 Illite, kaolinite Vermiculite Montmorillonite W -soil 53.10 22.48 10.14 0.68 0.41 2.28 0.23 131.75 8.00 Illite Kaolinite Chlorite Soil Stabilizer.
Table 4 The Ucs With Soil And Additive Type(Age of 7 Days) Sample Number Application Rate Average Value(MPa) Standard Deviation(MPa) Coefficient Of Variation(%) L-soil 0 0.74 0.09 0.12 0.05% 1.07 0.07 0.06 W-soil 0 1.23 0.02 0.01 0.05% 1.34 0.04 0.03 Table 5 The Ucs With Soil And Additive Type(Age of 28 Days) Sample Number Application Rate Average Value(MPa) Standard Deviation(MPa) Coefficient Of Variation(%) L-soil 0 2.11 0.27 0.13 0.05% 2.58 0.19 0.07 W-soil 0 2.13 0.09 0.04 0.05% 2.57 0.17 0.07 The Capillary Soak Test.
Table 6 The Ucs and Time of Capillary Soak(Age of 7 Days) Sample Number Application Rate Average Value(MPa) Standard Deviation(MPa) Coefficient Of Variation (%) Time of saturation(min) L-soil 0 0.01 0.01 0.71 2880 0.05% 0.02 0.00 0.25 5040 W-soil 0 0.01 0.00 0.41 1077 0.05% 0.02 0.01 0.27 2750 Conclusion As indicated in this study,the Con-Aid stabilized L- and W-soil ,with cured age of 7days and 28 days ,had obvious increase in strength as compared to raw soils which had the property of high liquid limit and could not be filled with embankment. additionally, Con-Aid stabilization is effective in increasing the UCS of capillary saturated soil and extending duration of capillary saturation.
Online since: July 2018
Authors: Alain Portavoce, Khalid Hoummada
The number of atomic exchanges stays nevertheless relatively low and k ~ 1.
Once the phase nuclei formed, their growth involves a sufficient number of local atomic jumps to be diffusion-controlled and to follow a parabolic growth versus time.
(a) side view of the volume, and (b) NiSi grains located at the Ni2Si/Si interface in top view.
For example, in the case of columnar grains with a square section fg = L2/(L+d)2 and fgb = 1 - L2/(L+d)2 with L the grain lateral size and d the GB lateral size.
Gas, Lattice and grain boundary self‐diffusion in Ni2Si: Comparison with thin‐film formation, J.
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