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Online since: May 2017
Authors: Petr Bouška, Miroslav Vokáč, Tomáš Bittner, Šárka Nenadálová, Milan Rydval
TRC [1, 2] is a composite material consisting of a fine-grained UHPC matrix and textile glass fibres, known as AR-Glass.
This shortcoming was compensated for by making a calculation with an unlimited number of loading steps.
This shortcoming was compensated for by making a calculation with an unlimited number of loading steps.
Online since: July 2015
Authors: Yan Liu, Wen Yan Luo
The results indicated that the basicity, the number of strong base center and pore volume and pore size of Y-Mg-Al-LDO were increased.
With the increase of Y3+, the diffraction peak intensity in (003) crystal planes are reduced and half peak width of (003) is increased, which denotes that crystallinity decreases and grain size becomes smaller.
The alkali strength is improved and number is markedly increased.
Based on the characterization results, Y3+ doesn’t change hydrotalcite’s layered crystal structure, but other related parameters, i.e. the pore volume, pore diameter, basic strength and the number of strong base center, have increased, which could speed up the diffusion of acetone gas molecules in the mesoporous, provide more catalytic activity center for the catalytic reaction, and further improve the catalytic activity of the catalyst.
With the increase of Y3+, the diffraction peak intensity in (003) crystal planes are reduced and half peak width of (003) is increased, which denotes that crystallinity decreases and grain size becomes smaller.
The alkali strength is improved and number is markedly increased.
Based on the characterization results, Y3+ doesn’t change hydrotalcite’s layered crystal structure, but other related parameters, i.e. the pore volume, pore diameter, basic strength and the number of strong base center, have increased, which could speed up the diffusion of acetone gas molecules in the mesoporous, provide more catalytic activity center for the catalytic reaction, and further improve the catalytic activity of the catalyst.
Online since: October 2013
Authors: X.C. Li, J.H. Li, J.L. Ma, Y.J. Zhang, H.Y. Li
From the simulation result we can find that carbon influence the staking fault nucleation greatly, with the increasing of the number of C atoms, strain for staking fault form decreased, system with 4 C atoms staking fault formed when strain was 7.5% and for system without C atoms there are no staking fault with local tension strain up to 10%.
Deformation characteristics of various grain boundary angles on AFM-based nanolithography using molecular dynamics[J].
Deformation characteristics of various grain boundary angles on AFM-based nanolithography using molecular dynamics[J].
Online since: July 2011
Authors: Xue Yun Zhou, Jian Ning Wei, Tian Cheng Huang, Gen Mei Li, Li Ling Zhou, Jian Min Yu
Keywords: internal friction; damping behavior; macroscopic pore
Abstract
A large number of macroscopic pores were introduced into commercially pure aluminum (Al) and Zn-Al eutectoid alloy by air pressure infiltration process to comparatively study the influence of macroscopic pores on the damping behaviors of the materials.
The damping mechanism of the IF peak is the dislocation substructures intersecting and interacting with grain boundaries and as can be interpreted well in terms of a four-parameter mechanical model [5].
The damping mechanism of the IF peak is the dislocation substructures intersecting and interacting with grain boundaries and as can be interpreted well in terms of a four-parameter mechanical model [5].
Online since: January 2005
Authors: Woo Seog Ryu, Hyun Hie Kim, Kee Bong Yoon, Woo Gon Kim
A number of the data are collected
through wide literature surveys and experiment, and evaluated by the C* parameter.
In this paper, to evaluate the CCGR of the type 316SS series: 316SS, 316FR and 316LN, a number of CCGR data were collected through wide literature surveys and experiment.
(1) Where εf* is the creep ductility and its value is determined with readuction of area, and rc is the size of the process zone and its value is determined with grain size of materials.
In this paper, to evaluate the CCGR of the type 316SS series: 316SS, 316FR and 316LN, a number of CCGR data were collected through wide literature surveys and experiment.
(1) Where εf* is the creep ductility and its value is determined with readuction of area, and rc is the size of the process zone and its value is determined with grain size of materials.
Online since: April 2013
Authors: Luís M.O. Sousa, Alcino S. Oliveira, Irene M.C. Alves
It is defined as the sum of the number of discontinuities per meter in perpendicular direction for each joint set:
(1)
where N is the number of discontinuities and L is the length of the scan-line in a perpendicular direction for each joint set present (1, 2, 3, …).
Dn is estimated by counting the number of surfaces of natural rock blocks.
It is medium grained, with two micas (muscovite > biotite) and presents a high degree of weathering, with a characteristic yellowish brown colour that can be extremely variable (Fig. 2).
Fig. 4 - Distributions of the mean joint spacing (S) and median joint spacing (Smed) of the studied places (number of data: 30).
A large number of the exploitation places do not have the minimum conditions for extracting large blocks.
Dn is estimated by counting the number of surfaces of natural rock blocks.
It is medium grained, with two micas (muscovite > biotite) and presents a high degree of weathering, with a characteristic yellowish brown colour that can be extremely variable (Fig. 2).
Fig. 4 - Distributions of the mean joint spacing (S) and median joint spacing (Smed) of the studied places (number of data: 30).
A large number of the exploitation places do not have the minimum conditions for extracting large blocks.
Online since: July 2003
Authors: Chunsheng E, Wei Dou Ni, Dong Xiang Jiang
There are several methods of
measuring the fractal dimension which include changing coarse graining level, such as selfresemble
dimension, Hausdorff dimension, box-counting dimension, correlation dimension,
information dimension and so on.
Then, counts the numbers of units (smallest squares) in the grid that have intersect with the orbit.
The number is stored in a variable namely )(mN .
The shaft centre orbit In SGA, it is key to count accurately the number of the units that intersect with the orbit.
Finally, the sum of all elements in the matrix is the number of units that have intersections with the orbit.
Then, counts the numbers of units (smallest squares) in the grid that have intersect with the orbit.
The number is stored in a variable namely )(mN .
The shaft centre orbit In SGA, it is key to count accurately the number of the units that intersect with the orbit.
Finally, the sum of all elements in the matrix is the number of units that have intersections with the orbit.
Online since: December 2024
Authors: Valeriy M. Vyrovoy, Volodymyr Martynov, Svitlana Makarova, Dmytro Taichan
Research Methodology and Results
In accordance with the tasks set, a number of experiments were conducted to determine the change in the distribution of the solid component.
For this, a number of experiments were conducted.
Dependence of the strength of the mortar mixture on the water-cement ratio The graph presented in Fig. 3 shows the influence of the strength of the mortar component on the strength of foam concrete when using filler with different ultimate grain sizes.
It shows that the strength of foam concrete depends on both the strength of the mortar mixture and the ultimate grain size of the filler.
After the end of hostilities in Ukraine, in order to restore the infrastructure, there will be a need for a large number and variety of construction materials and products.
For this, a number of experiments were conducted.
Dependence of the strength of the mortar mixture on the water-cement ratio The graph presented in Fig. 3 shows the influence of the strength of the mortar component on the strength of foam concrete when using filler with different ultimate grain sizes.
It shows that the strength of foam concrete depends on both the strength of the mortar mixture and the ultimate grain size of the filler.
After the end of hostilities in Ukraine, in order to restore the infrastructure, there will be a need for a large number and variety of construction materials and products.
Online since: February 2014
Authors: Lan Po Zhao, Nan Gu, Xing Min Zhao
Based on the study of slow and controlled release fertilizer, we summarized a large number of research materials at home and abroad, comprehensive elaborated the development progress of slow and controlled release fertilizer in China, and reviewed the utilization efficiency of fertilizer in different corps.
Yuan Put forward:in order to improve the yield of grain, can only rely on science and technology,” good seed, good law and excellent field”is very important.
At present our country sustained and controlled release fertilizer leading enterprise "s" company, developed a lot for a single material slow-release fertilizer, the characteristics, the crop nutrient absorption of planting the crop soil structure and factors such as climate change, through a lot of experiments developed a large number of specific slow-release fertilizer, better yield, efficiency. 3.
Yuan Put forward:in order to improve the yield of grain, can only rely on science and technology,” good seed, good law and excellent field”is very important.
At present our country sustained and controlled release fertilizer leading enterprise "s" company, developed a lot for a single material slow-release fertilizer, the characteristics, the crop nutrient absorption of planting the crop soil structure and factors such as climate change, through a lot of experiments developed a large number of specific slow-release fertilizer, better yield, efficiency. 3.