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Online since: May 2023
Authors: Mustafa Chouireb, Oulad Naoui Noureddine, Abdelkader Djehiche, Gafsi Mostefa
Table 2 contains the results of leakage flow through EL-Haimeur and Boubrik dams using Seep/W, empirical equation, and q_ANN.
These models were validated through their application in two real dams located in deferent regions (El-Haimeur and Boubrik).
Al-Janabi, A.
Al-Ansari, Z.
Khattab, Stability analysis of Mosul dam under saturated and unsaturated soil condition Al-Rafidain, Engineering Journal 18(1), (2009) 13-27
These models were validated through their application in two real dams located in deferent regions (El-Haimeur and Boubrik).
Al-Janabi, A.
Al-Ansari, Z.
Khattab, Stability analysis of Mosul dam under saturated and unsaturated soil condition Al-Rafidain, Engineering Journal 18(1), (2009) 13-27
Online since: December 2011
Authors: Zi Dong Wang, Hong Zhang, Zhan Lei Wei, Long Fei Zuo, Ben Ma, Li Xian Zhang
C
Si
Mn
P
S
Ni
Cr
Mo
V
Nb, Ti, Al
≤0.04
0.17-0.37
0.4-0.7
<0.015
<0.01
4.4-4.8
0.4-0.7
0.32-0.55
0.06-0.09
---
Results and Discussion
Mechanical Properties.
Besides, both the YS and EL increased to 733MPa and 11.65% respectively.
Also 16.2% EL and 0.91 ratio of YS-UTS were achieved.
(b) EL and Ratio of YS-UTS Fig.1.
EDS analysis told us that the elements contained in nanoparticles are mainly Nb (Atomic 28.63%) and Ti (22.10%) accompanied little Cr, V, Mo and Al.
Besides, both the YS and EL increased to 733MPa and 11.65% respectively.
Also 16.2% EL and 0.91 ratio of YS-UTS were achieved.
(b) EL and Ratio of YS-UTS Fig.1.
EDS analysis told us that the elements contained in nanoparticles are mainly Nb (Atomic 28.63%) and Ti (22.10%) accompanied little Cr, V, Mo and Al.
Online since: December 2023
Authors: Mohamed G.A. Nassef, Hiroshi Naragino, Ndabezinhle Ngubhe Dube, Abdelrahman Zkria, Marwa F. El Kady, Hussien Noby
El-Adly et al. (2012) studied the use of jojoba and sulphurized jojoba as base stocks for lithium greases.
Activated carbon was prepared based on the method described by Gohoho et al. (2021) [13].
Syahir et al., “A review on bio-based lubricants and their applications,” J.
El-Adly, A.
El-Shazly, “Waste to Product: Feasibility of Egyptian Peanut Shell Transformation into a Useful Product,” Key Eng.
Activated carbon was prepared based on the method described by Gohoho et al. (2021) [13].
Syahir et al., “A review on bio-based lubricants and their applications,” J.
El-Adly, A.
El-Shazly, “Waste to Product: Feasibility of Egyptian Peanut Shell Transformation into a Useful Product,” Key Eng.
Online since: April 2023
Authors: Victor Emeka Ejiofor, Khaled Abou-El-Hossein
Optimization Strategy for Molecular Dynamics Simulations of Nanometric Cutting of Aluminium Alloy using Molecular Modelling
Victor Emeka Ejiofora and Khaled Abou-El-Hosseinb
Ultra-High Precision Manufacturing Laboratory, Department of Mechatronics Engineering, Nelson Mandela University, Port Elizabeth, South Africa
as217010350@mandela.ac.za, bKhaled.Abou-El-Hossein@mandela.ac.za
Keywords: Molecular Modelling, Molecular Dynamics Simulations, Optimization Strategy, Rapidly Solidified Aluminium (RSA 431) Alloy, Nanometric Cutting.
The ratio between mass density and atomic mass of Al and the Al-alloying elements (R) accounts for the atomic concentration.
Table 3 presents computed Ratios (R) between mass density and atomic mass of Al and the Al-alloying elements of the RSA 431.
Abou-El-Hossein, "Aspects of ultra-high-precision diamond machining of RSA 443 optical aluminium," in Optical Manufacturing and Testing XI, 2015, pp. 44-49
Greer, "Size effects in Al nanopillars: Single crystalline vs. bicrystalline," Acta Materialia, vol. 59, pp. 4416-4424, 2011
The ratio between mass density and atomic mass of Al and the Al-alloying elements (R) accounts for the atomic concentration.
Table 3 presents computed Ratios (R) between mass density and atomic mass of Al and the Al-alloying elements of the RSA 431.
Abou-El-Hossein, "Aspects of ultra-high-precision diamond machining of RSA 443 optical aluminium," in Optical Manufacturing and Testing XI, 2015, pp. 44-49
Greer, "Size effects in Al nanopillars: Single crystalline vs. bicrystalline," Acta Materialia, vol. 59, pp. 4416-4424, 2011
Online since: May 2011
Authors: Hong Nan Li, Hui Qian, Di Cui, Huai Chen
Ocel et al. [12] and McCormick et al. [13] both investigated beam–column connections using SMA bars.
dissipation system under El seismic records.
Duerig, et al, Engineering aspects of shape memory alloys, Butter worth-Heinemann, London, (1990)
Indirli, et al, Proceedings of SPIE, Vol 4330, 262-272 (2001)
Cho, et al.
dissipation system under El seismic records.
Duerig, et al, Engineering aspects of shape memory alloys, Butter worth-Heinemann, London, (1990)
Indirli, et al, Proceedings of SPIE, Vol 4330, 262-272 (2001)
Cho, et al.
Online since: September 2013
Authors: Wei Hua Jiang, Xiao Jie Liu, Xiao Qin Huang
The comparison theorem, which is an important theory of BSDE, was established by Peng [7] and then generalized by EL Karoui et al. [4].
Chen [2], Briand et al. [1] and Coquet et al. [3] worked on this subject and established some converse comparison theorems.
But unfortunately, when we apply BSDEs theory to option pricing (see El Karoui et al.[4]) or recursive utility (see Chen and Epstein[8]), we find that the generator g in these cases often does not satisfy .
(Comparison theorem EL Karoui [4])gy, .
EL Karoui, S.
Chen [2], Briand et al. [1] and Coquet et al. [3] worked on this subject and established some converse comparison theorems.
But unfortunately, when we apply BSDEs theory to option pricing (see El Karoui et al.[4]) or recursive utility (see Chen and Epstein[8]), we find that the generator g in these cases often does not satisfy .
(Comparison theorem EL Karoui [4])gy, .
EL Karoui, S.
Online since: August 2014
Authors: Jairo Cortes, Crhistian C.G. Segura
Introduction
For implementing a control that allows a biped robot some mobility, is necessary to handle various signals al time.
Results and discussionobjetivo del proyecto es el implementar el control de servomotores en la fpga dado que nos permite un paralelismo en las señales, de esta manera podemos tener las 6 salidas de PWM que necesita el servo de manera simultanea, esto con el objetivo de facilitar el control del robot.
· The versatility of the VHDL language and the ability to repeat several times the components making it necessary to perform a single PWM control and then replicate their performance many times as needed.objetivo del proyecto es el implementar el control de servomotores en la fpga dado que nos permite un paralelismo en las señales, de esta manera podemos tener las 6 salidas de PWM que necesita el servo de manera simultanea, esto con el objetivo de facilitar el control del robot.para esto se realizaron unos conteos intermos para poder obtener un pwm cuyo ancho de pulso se puede variar de 1.5 a 2 ms, y una frecuencia de 20ms entre cada pulso, estos son los estandares pra manejo de servos References [1] Motion generation of a biped locomotive robot using an inverted pendulum model and neural networks.
Results and discussionobjetivo del proyecto es el implementar el control de servomotores en la fpga dado que nos permite un paralelismo en las señales, de esta manera podemos tener las 6 salidas de PWM que necesita el servo de manera simultanea, esto con el objetivo de facilitar el control del robot.
· The versatility of the VHDL language and the ability to repeat several times the components making it necessary to perform a single PWM control and then replicate their performance many times as needed.objetivo del proyecto es el implementar el control de servomotores en la fpga dado que nos permite un paralelismo en las señales, de esta manera podemos tener las 6 salidas de PWM que necesita el servo de manera simultanea, esto con el objetivo de facilitar el control del robot.para esto se realizaron unos conteos intermos para poder obtener un pwm cuyo ancho de pulso se puede variar de 1.5 a 2 ms, y una frecuencia de 20ms entre cada pulso, estos son los estandares pra manejo de servos References [1] Motion generation of a biped locomotive robot using an inverted pendulum model and neural networks.
Online since: June 2012
Authors: Xi La Liu, Wan Ruo Chen, Shou Ping Shang
We inputting Gaussian white noise measured vibration period, dynamic response with EL and Taft wave show the shock absorption effect of the soil.
We input the Gaussian white noise which measured vibration period of steel framework and input the Taft and EL waves which measured the dynamic response of steel frames.
We collected Gaussian white noise signal and used DASP software to do frequency analysis, and we collected EL and Taft waves signal do time-domain analysis.
The model structural stiffness threshold was value 2.558 × 103kN/m as the relative stiffness of the foundation soil, according to the test the structure get the additional period is ΔT and the upper structure stiffness K relationship is: ΔT = 0.019K +0.112 (2) The relationship of peak acceleration reduction and model superstructure stiffness K is: γ= - 0.028K2 +0.142 K +0.637 (3) Table 4 Peak acceleration of the top storey Condition number the top storey acceleration [m/s2] Acceleration reduction EL wave Taft wave In soil a0 On rigid foundationa In soil a0 On rigid foundation a EL wave a0/a Taft wave a0/a Mean value γ 1 2.091 3.036 1.389 1.604 0.689 0.866 0.778 2 0.819 1.143 1.482 1.965 0.717 0.754 0.736 3 1.321 1.830 1.749 1.578 0.721 1.108 0.915 4 3.545 5.916 2.824
[7] Shang Shouping, He Zhiwen,et al.
We input the Gaussian white noise which measured vibration period of steel framework and input the Taft and EL waves which measured the dynamic response of steel frames.
We collected Gaussian white noise signal and used DASP software to do frequency analysis, and we collected EL and Taft waves signal do time-domain analysis.
The model structural stiffness threshold was value 2.558 × 103kN/m as the relative stiffness of the foundation soil, according to the test the structure get the additional period is ΔT and the upper structure stiffness K relationship is: ΔT = 0.019K +0.112 (2) The relationship of peak acceleration reduction and model superstructure stiffness K is: γ= - 0.028K2 +0.142 K +0.637 (3) Table 4 Peak acceleration of the top storey Condition number the top storey acceleration [m/s2] Acceleration reduction EL wave Taft wave In soil a0 On rigid foundationa In soil a0 On rigid foundation a EL wave a0/a Taft wave a0/a Mean value γ 1 2.091 3.036 1.389 1.604 0.689 0.866 0.778 2 0.819 1.143 1.482 1.965 0.717 0.754 0.736 3 1.321 1.830 1.749 1.578 0.721 1.108 0.915 4 3.545 5.916 2.824
[7] Shang Shouping, He Zhiwen,et al.
Online since: June 2012
Authors: Hong Xiang Zhai, Zhen Ying Huang, Meng Qi Li
The mole ratio was Ti : Al : TiC : Sn = 1 : 1 : 0.9 : 0.1 (recipe I), Ti : Al : TiC : Sn = 1 : 1 : 0.8 : 0.1 (recipe II), Ti : Al : TiC : Sn = 1 : 1 : 0.7 : 0.1 (recipe III), Ti : Al : TiC : Sn = 1 : 1: 0.6 : 0.1 (recipe IV) respectively.
Although the ratio of Al in these four recipes is surplus relative to the stoichiometric ratio of Ti2AlC, evaporation of Al might improve the proportion of Ti, Al and TiC in the reaction system.
El-Raghy, Synthesis and Characterization of a Remarkable Ceramic Ti3SiC2, J.
El-Raghy, Processing and Characterization of Ti2AlC, Ti2AlN, and Ti2AlC0.5N0.5, Metall.
Vaccaro, The ternary systems: Cr-Al-C, V-Al-C, and Ti-Al-C and the behavior of H-phases (M2AlC), J.
Although the ratio of Al in these four recipes is surplus relative to the stoichiometric ratio of Ti2AlC, evaporation of Al might improve the proportion of Ti, Al and TiC in the reaction system.
El-Raghy, Synthesis and Characterization of a Remarkable Ceramic Ti3SiC2, J.
El-Raghy, Processing and Characterization of Ti2AlC, Ti2AlN, and Ti2AlC0.5N0.5, Metall.
Vaccaro, The ternary systems: Cr-Al-C, V-Al-C, and Ti-Al-C and the behavior of H-phases (M2AlC), J.
Online since: June 2014
Authors: S.M. Sapuan, Y.A. El-Shekeil
El-Shekeil1, a, S.
[4] El-Shekeil YA, Sapuan SM, Khalina A, Zainudin ES, O.
Al-Shuja’a, Bulletin of Material Science Vol.
[11] El-Shekeil YA, Sapuan SM, Abdan K, Zainudin ES, BioResources Vol. 6, (2011), p. 4662-4672
[12] El-Shekeil YA, Sapuan SM, Abdan K, Zainudin ES, Materials & Design Vol. 40, (2012), p. 299-303
[4] El-Shekeil YA, Sapuan SM, Khalina A, Zainudin ES, O.
Al-Shuja’a, Bulletin of Material Science Vol.
[11] El-Shekeil YA, Sapuan SM, Abdan K, Zainudin ES, BioResources Vol. 6, (2011), p. 4662-4672
[12] El-Shekeil YA, Sapuan SM, Abdan K, Zainudin ES, Materials & Design Vol. 40, (2012), p. 299-303