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Online since: February 2003
Authors: Sergey I. Sidorenko, L. Demchenko, V. Tinyaev
When certain (15-30%)
deformation conditions occur the most mobile dislocations number is generated.
X-ray investigations of surface layers structure after different deformation (Fig. 3b) showed that integral width of (310)Kα1 diffraction line increased with deformation degree rise up to 10-20% that could be caused by increase of dislocations density including mobile dislocations number.
According to [8] the raise of the deformation up to 17-22% increases the number of mobile (unfixed) dislocations while the further increase decreases their number.
Besides, the contribution to the total mass transfer due to the grain-boundary diffusion need to be considered.
X-ray investigations of surface layers structure after different deformation (Fig. 3b) showed that integral width of (310)Kα1 diffraction line increased with deformation degree rise up to 10-20% that could be caused by increase of dislocations density including mobile dislocations number.
According to [8] the raise of the deformation up to 17-22% increases the number of mobile (unfixed) dislocations while the further increase decreases their number.
Besides, the contribution to the total mass transfer due to the grain-boundary diffusion need to be considered.
Online since: June 2019
Authors: Radka Pernicová, Monika Utěšená, Jan Sestak
In case of poor compaction, stains may appear on the surface. [22, 23, 24]
The number and size of pores.
The number and size of pores on the surface are affected by the type of formwork used.
This is in particular the consistency of fresh concrete and the size of the grains, which must conform to the casting process.
Acknowledgement The research was supported by the Czech Republic under the number P105/12/G059 and Czech Technical University in Prague under number SGS 18/198/OHK1/3T/15.
The number and size of pores on the surface are affected by the type of formwork used.
This is in particular the consistency of fresh concrete and the size of the grains, which must conform to the casting process.
Acknowledgement The research was supported by the Czech Republic under the number P105/12/G059 and Czech Technical University in Prague under number SGS 18/198/OHK1/3T/15.
Online since: August 2021
Authors: Vladimir I. Kolesnikov, Olga A. Belyak, Tatiana V. Suvorova
According to the data presented in [1], the multilayer coating contained 19 thick layers or 55 thin layers, and Ti/Al atomic ratio was satisfied by the layer thickness and their number in the package.
It should be noted that, as in the case of the first approach, upon reaching a certain number of layers, components of the stiffness tensor virtually do not change.
Since an increase in the number of layers leads to a decrease in their thickness, we had to stop the numerical experiment when the number of layers was equal to 30.
Shavshukov, Inhomogeneities in grains of polycrystalline materials and Eshelby problem, PNRPU Mechanics Bull. 1 (2018) 58-72
It should be noted that, as in the case of the first approach, upon reaching a certain number of layers, components of the stiffness tensor virtually do not change.
Since an increase in the number of layers leads to a decrease in their thickness, we had to stop the numerical experiment when the number of layers was equal to 30.
Shavshukov, Inhomogeneities in grains of polycrystalline materials and Eshelby problem, PNRPU Mechanics Bull. 1 (2018) 58-72
Online since: August 2013
Authors: Qin Xiang Wang, Wan Qiang Chu
Scale name
Plane
Vertical
Variability
Flow rate
Flow
Grain size
Scale size
100
50
2
7.07
35355
25
Table 1 Main scales of model
Model Making and Installation
The model uses the Section Method to make topography, the dam part is made of concrete, the overflow structures is simulated by plexiglass, the beach face and riverbed will be hardened by concrete mortar, each section panel will be fixed by sand, the tail water is designed by plug board tailgate.
Table 2 Control application mode of sluice gate Opening scheme of sluice hole Reservior water level (m) Discharge flow (m3/s) Hole number Gate control application mode Working condition 1 445.0 300 3 2,4,6#gate partially open, 1,3,5 # gate close Working condition 2 445.0 600 5 gate partially open, 1,7 #close Working condition 3 445.0 900 5 3,5# gate fully open,5,4,6# gate partially open,1,7 # close Working condition 4 445.0 1200 5 2,3,5,6# gate fully open,4#gate partially open, 1,7# gate close Working condition 5 445.0 1500 7 2,3,4,5,6# gate fully open, 1,7# gate partially open Working condition 6 445.0 1880 7 1~7# fully open Note: The number in the gate operation mode is from the left bank to right bank of sequentially numbered number Fig.3 Velocity distribution drawings of stilling basin end, apron end and anti-scour trench downstream Upstream Inlet Flow Pattern Test.
Table 2 Control application mode of sluice gate Opening scheme of sluice hole Reservior water level (m) Discharge flow (m3/s) Hole number Gate control application mode Working condition 1 445.0 300 3 2,4,6#gate partially open, 1,3,5 # gate close Working condition 2 445.0 600 5 gate partially open, 1,7 #close Working condition 3 445.0 900 5 3,5# gate fully open,5,4,6# gate partially open,1,7 # close Working condition 4 445.0 1200 5 2,3,5,6# gate fully open,4#gate partially open, 1,7# gate close Working condition 5 445.0 1500 7 2,3,4,5,6# gate fully open, 1,7# gate partially open Working condition 6 445.0 1880 7 1~7# fully open Note: The number in the gate operation mode is from the left bank to right bank of sequentially numbered number Fig.3 Velocity distribution drawings of stilling basin end, apron end and anti-scour trench downstream Upstream Inlet Flow Pattern Test.
Online since: July 2019
Authors: Ye Da Lian, Lu Liu, Z. Xu, Q. Gao, Z. Wen
Compressed cooling air passing through a large number of fine film-cooling holes (diameter less than 400 um) is an important way to reduce the blade surface temperature.
Table 2 Taper of each film-cooling hole in different hole processes Technology Serial number Average diameter of inlet /mm Average diameter of outlet /mm tanθ Taper θ/º Forming EDM 1 0.513 0.541 7.00E-03 0.4 2 0.521 0.536 3.75E-03 0.21 3 0.503 0.533 7.50E-03 0.43 4 0.519 0.548 7.25E-03 0.42 5 0.534 0.545 2.75E-03 0.16 High-speed EDM 1 0.506 0.540 8.50E-03 0.49 2 0.512 0.536 6.00E-03 0.34 3 0.505 0.565 1.50E-02 0.86 4 0.514 0.550 9.00E-03 0.52 5 0.541 0.544 7.50E-04 0.43 3.3.
The shear stress of the circular hole is symmetrically distributed, reaching a maximum at both ends of the hole; for the tapered hole, the shear stress at the large hole end is significantly larger than that of the small hole, and as the number of cycles increases, cracks will also sprout here.
It can be seen that both of them show the same trend of change, and the damage of the hole is larger at the first cycle, and decreases gradually with the increase of the number of cycles, and finally tends to be stable.
Reference [1] Yao Wang, et al, Characterization of Tilt and Twist Low Angle Grain Boundaries and Their Effects on Intermediate‐Temperature Creep Deformation Behaviour [J].
Table 2 Taper of each film-cooling hole in different hole processes Technology Serial number Average diameter of inlet /mm Average diameter of outlet /mm tanθ Taper θ/º Forming EDM 1 0.513 0.541 7.00E-03 0.4 2 0.521 0.536 3.75E-03 0.21 3 0.503 0.533 7.50E-03 0.43 4 0.519 0.548 7.25E-03 0.42 5 0.534 0.545 2.75E-03 0.16 High-speed EDM 1 0.506 0.540 8.50E-03 0.49 2 0.512 0.536 6.00E-03 0.34 3 0.505 0.565 1.50E-02 0.86 4 0.514 0.550 9.00E-03 0.52 5 0.541 0.544 7.50E-04 0.43 3.3.
The shear stress of the circular hole is symmetrically distributed, reaching a maximum at both ends of the hole; for the tapered hole, the shear stress at the large hole end is significantly larger than that of the small hole, and as the number of cycles increases, cracks will also sprout here.
It can be seen that both of them show the same trend of change, and the damage of the hole is larger at the first cycle, and decreases gradually with the increase of the number of cycles, and finally tends to be stable.
Reference [1] Yao Wang, et al, Characterization of Tilt and Twist Low Angle Grain Boundaries and Their Effects on Intermediate‐Temperature Creep Deformation Behaviour [J].
Online since: August 2022
Authors: Li Jun Han, Jun Jie Zhu, Yu Bo Chen
The number of lines per cylinder surface (RPc) is 9 Lines/mm (±1).
Table 3 Main parameters of the laser roughing process Nozzle number Linear velocity(m/s) Line number(mm) Laser powe(w) Protection gas 2 105 9±1 1000±100 N2 2.3.
Number of defects, e.g. oxides and pores, increases while choosing wrong value for the spray parameters.
Owing to rapid cooling and high-speed impact of particles, the grains of the coated layer were refined obviously, together with lattice distortion.
Table 3 Main parameters of the laser roughing process Nozzle number Linear velocity(m/s) Line number(mm) Laser powe(w) Protection gas 2 105 9±1 1000±100 N2 2.3.
Number of defects, e.g. oxides and pores, increases while choosing wrong value for the spray parameters.
Owing to rapid cooling and high-speed impact of particles, the grains of the coated layer were refined obviously, together with lattice distortion.
Online since: March 2023
Authors: Ryosuke Ohnuki, Yukikazu Takeoka, Shinya Yoshioka
It was recently discovered that spherical colloidal clusters have different particle arrangements depending on the preparation conditions, for example, the number of particles inside micelles and the shrinking speed of micelles.
One Mackay structure is shifted upward (red grain).
The surface FCC lattice has a different number of colloidal particle layers depending on the position because of the spherical shape of the clusters: the number of layers is higher in the center of the triangle and smaller near the edge.
Acknowledgment This study was supported by JSPS KAKENHI (Grant Number 22J12152).
One Mackay structure is shifted upward (red grain).
The surface FCC lattice has a different number of colloidal particle layers depending on the position because of the spherical shape of the clusters: the number of layers is higher in the center of the triangle and smaller near the edge.
Acknowledgment This study was supported by JSPS KAKENHI (Grant Number 22J12152).
Online since: May 2012
Authors: Pei Ji Shi, Hai Long Liu, Sheng Wu Zhang, Li Chen
With the accelerating process of urbanization in China, it is in big need to build a number of key towns and expand the size of some cities to promote the development of surrounding areas, which is also suitable in Qingyang City.
Table 1 The urban population size of Qingyang City levels Scale/ten thousand people number/ a Number percentage /% Population percentage/% 1 10~20 1 2.70 31.38 2 5~10 1 2.70 15.69 3 2~5 4 10.82 34.52 4 〈2 31 83.78 18.41 cumulation —— 37 100 100 Data sources: Annual Book of Gansu Development 2010 Fractal dimension estimation urban-scale structure.
Calculation and evaluation of the ecological carrying capacity Ecological carrying capacity refers to the self-sustaining and self-regulating capacity of eco-system, the capacity for tolerance of resource with resources and environment subsystem, the intensity of social and economic activities, and a certain number of people with some degree of living standard[4].
Index layer contains 7 indexes and they are Per capita water amount index(I10), per capita Cultivated land Area index(I11), Grain yield index(I12), Forest coverage rate(I13), Per-capita forest area index(I14), land proportion of forested land(I15), Per capita grassland area index(I16).
Table 1 The urban population size of Qingyang City levels Scale/ten thousand people number/ a Number percentage /% Population percentage/% 1 10~20 1 2.70 31.38 2 5~10 1 2.70 15.69 3 2~5 4 10.82 34.52 4 〈2 31 83.78 18.41 cumulation —— 37 100 100 Data sources: Annual Book of Gansu Development 2010 Fractal dimension estimation urban-scale structure.
Calculation and evaluation of the ecological carrying capacity Ecological carrying capacity refers to the self-sustaining and self-regulating capacity of eco-system, the capacity for tolerance of resource with resources and environment subsystem, the intensity of social and economic activities, and a certain number of people with some degree of living standard[4].
Index layer contains 7 indexes and they are Per capita water amount index(I10), per capita Cultivated land Area index(I11), Grain yield index(I12), Forest coverage rate(I13), Per-capita forest area index(I14), land proportion of forested land(I15), Per capita grassland area index(I16).
Online since: November 2011
Authors: Jian Zhong Cui, Li Zi He, Xie Hua Li, Yi Heng Cao, Pei Zhu
White AlFeSi phase and black microporosity can be seen in Fig.2(a), they mainly distribute at intergrain boundaries and grain boundaries.
%Mg into 1050 alloy, the diffraction peaks of Mg2Al3 are detected (Fig.3(b)), and there is no changes of the intensity and number of detected peaks of Al2O3 and AlFeSi.
%Er into 1050 alloy (Fig.3(c)), the diffraction peaks of ErAl3 are found, at the same time, the intensity and number of detected peaks of Al2O3 and AlFeSi increase.
%MRE into 1050 alloy (Fig.3(d)), the same types of the detected phases are found, but the the intensity and number of detected peaks of Al2O3 and AlFeSi also increase, which is less than those in alloy adding 0.3wt.
The results of microstructural obervations and XRD analysis find that the number of metallic inclusion AlFeSi and non-metallic inclusion Al2O3 increase when adding Er into 1050 alloy, which significantly increases the tendency of hydrogen absorption in 1050 alloy.
%Mg into 1050 alloy, the diffraction peaks of Mg2Al3 are detected (Fig.3(b)), and there is no changes of the intensity and number of detected peaks of Al2O3 and AlFeSi.
%Er into 1050 alloy (Fig.3(c)), the diffraction peaks of ErAl3 are found, at the same time, the intensity and number of detected peaks of Al2O3 and AlFeSi increase.
%MRE into 1050 alloy (Fig.3(d)), the same types of the detected phases are found, but the the intensity and number of detected peaks of Al2O3 and AlFeSi also increase, which is less than those in alloy adding 0.3wt.
The results of microstructural obervations and XRD analysis find that the number of metallic inclusion AlFeSi and non-metallic inclusion Al2O3 increase when adding Er into 1050 alloy, which significantly increases the tendency of hydrogen absorption in 1050 alloy.
Online since: March 2024
Authors: Ajit Singh, Lawal Billa, Debbie Sparkes, Erik Murchie, Vinay Pagay, Deepak Gautam, Alessia Cogato, Shaikh Yassir Yousouf Jewan
The zonal statistics tool was then used to assess number of vegetated pixels within each plot.
FVC was calculated by dividing the number of vegetated pixels by the total number of pixels in the AOI.
No, number of samples; min, minimum, max, maximum; SD, standard deviation; and CV, coefficient of variation.
Grain yield prediction using multi-temporal UAV-based multispectral vegetation indices and endmember abundance in rice.
FVC was calculated by dividing the number of vegetated pixels by the total number of pixels in the AOI.
No, number of samples; min, minimum, max, maximum; SD, standard deviation; and CV, coefficient of variation.
Grain yield prediction using multi-temporal UAV-based multispectral vegetation indices and endmember abundance in rice.