Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: March 2025
Authors: Chuan Yin, Meng Wang
Figure 9(b) shows the EL spectra of the prepared near-infrared LED under different forward driving voltages, and the EL emission intensity increases with the increase of driving voltage.
[2] WANG Y, GUI Q F, WANG P, et al.
[3] GAO Z R, LYU P, XU C F, et al.
[4] FANG C, YANG J k, ZHOU G J, et al.
[9] CHEN B, GUO Y, WANG Y, et al.
[2] WANG Y, GUI Q F, WANG P, et al.
[3] GAO Z R, LYU P, XU C F, et al.
[4] FANG C, YANG J k, ZHOU G J, et al.
[9] CHEN B, GUO Y, WANG Y, et al.
Investigation of the Mechanical Properties in Al/Al3Zr FGMs Fabricated by Centrifugal Casting Method
Online since: October 2009
Authors: Hisashi Sato, Yoshimi Watanabe, Shimaa El Hadad
Investigation of the Mechanical Properties in Al/Al3Zr FGMs Fabricated
by Centrifugal Casting Method
Shimaa El-Hadad1, 2,a, Hisashi Sato3, b, Yoshimi Watanabe1,c
1
Department of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology,
Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
2
Department of Manufacturing Technology, Central Metallurgical Research & Development
Institute, P.O.BOX 87, Helwan, Cairo, Egypt
3
Department of Techno-Business Administration, Nagoya Institute of Technology, Gokiso-cho,
Showa-ku, Nagoya 466-8555, Japan
a
chm86501@stn.nitech.ac.jp,b sato.hisashi@nitech.ac.jp,
c yoshimi@nitech.ac.jp
Keywords: Al-5%Zr FGMs, centrifugal force, microstructure, intermetallics distribution, mechanical
properties.
In this study, some mechanical properties of Al/Al3Zr FGMs were investigated.
Mechanical Properties of Al/Al3Zr FGMs Hardness Distribution.
From compression tests, the 0.2% proof stresses were measured for Al/Al3Zr FGMs.
Fig. 6 Stress strain curve for Al/Al3Zr FGMs cast under G=120 and G=30.
In this study, some mechanical properties of Al/Al3Zr FGMs were investigated.
Mechanical Properties of Al/Al3Zr FGMs Hardness Distribution.
From compression tests, the 0.2% proof stresses were measured for Al/Al3Zr FGMs.
Fig. 6 Stress strain curve for Al/Al3Zr FGMs cast under G=120 and G=30.
Online since: July 2006
Authors: Kadi-Hanifi Mouhyddine, Azzeddine Abderrahmane Raho
Influence of Cd and In on the Formation Kinetics of the δ'
Metastable Phase in Al-Li-In(Cd) Alloys
A.Raho et M.Kadi-Hanifi
Laboratoire 'Solutions solides', Faculté de Physique, USTHB,
BP 32 El-Alia,Babezzoua, Alger, Algérie
mkadihanifi@yahoo.fr
Keywords: precipitation, δ' metastable phase, Al-Li solid solution
Abstract :The influence of the cadmium and the indium on the kinetics of the δ' metastable
phase precipitation has been studied in Al-8.5at.
%Li and Al-8.5%at.
%Li (A1 sample), Al-8.5at.
RESULTS AND DISCUSSION The HV(t) hardness isotherms of the Al-Li, Al-Li-Cd and Al-Li-In solid solutions determined at the ageing temperatures of 150, 180 and 200°C (Figures 1, 2, 3) show two stages in the HV(t) evolution.
The delay time concerning Al-Li-In and Al-Li-Cd is, on the one hand due to the strong E binding energy between In and Cd and the vacancies EIn-vacancy= 0,25 Ev, and ECd-vacancy= 0,18 eV [5] and, on the other hand, due to the clusters formation as "In-vacancy-Li" and "Cd-vacancyLi"in Al-Li-In and Al-Li-Cd.The atomic weight of these clusters is higher that of Al-Li where the "Al-Li" clusters form, and moderates the clusters movement.
%Li and Al-8.5%at.
%Li (A1 sample), Al-8.5at.
RESULTS AND DISCUSSION The HV(t) hardness isotherms of the Al-Li, Al-Li-Cd and Al-Li-In solid solutions determined at the ageing temperatures of 150, 180 and 200°C (Figures 1, 2, 3) show two stages in the HV(t) evolution.
The delay time concerning Al-Li-In and Al-Li-Cd is, on the one hand due to the strong E binding energy between In and Cd and the vacancies EIn-vacancy= 0,25 Ev, and ECd-vacancy= 0,18 eV [5] and, on the other hand, due to the clusters formation as "In-vacancy-Li" and "Cd-vacancyLi"in Al-Li-In and Al-Li-Cd.The atomic weight of these clusters is higher that of Al-Li where the "Al-Li" clusters form, and moderates the clusters movement.
Online since: December 2010
Authors: Hing Ho Tsang, Shou Ping Shang, Hai Dong Wang, Fang Yuan Zhou, Wei Xiong, S.H. Lo
a) Consolidation pressure 50 kPa, El Centro Amplitude 0.2 g
b) Consolidation pressure 100 kPa, El Centro Amplitude 0.2 g
c) Consolidation pressure 50 kPa, El Centro Amplitude 0.3 g
d) Consolidation pressure 100 kPa, El Centro Amplitude 0.3 g
e) Consolidation pressure 50 kPa, El Centro Amplitude 0.4 g
f) Consolidation pressure 100 kPa, El Centro Amplitude 0.4 g
Figure 4.
Shang et al: J.
Shang et al: J.
Online since: June 2014
Authors: Mohamad Al Ali
Compressed Thin-Walled Cold-Formed Steel Members
with Closed Cross-Sections
Mohamad Al Ali1,a*
1 Technical University of Košice, Faculty of Civil Engineering, Vysokoškolská 4, Košice, Slovakia
a mohamad.alali@tuke.sk
Keywords: thin-walled profiles, cold-formed profiles, initial imperfections, experimental research
Abstract.
Table 4 Theoretical and experimental limit loads; cross-sectional group B Member Npl,STN Npl,EN Nul,el,STN Nul,el,EN Nu,y,STN Nu,y,EN Nu,z,STN Nu,z,EN Nu,exp [kN] B11 257.27 254.62 217.26 187.42 217.26 187.42 217.26 187.42 159.45 B12 258.02 255.36 217.45 187.51 217.45 187.51 217.45 187.51 165.83 B13 258.19 255.55 216.69 186.66 216.69 186.66 216.69 186.66 158.39 B21 312.08 309.40 229.30 194.45 229.30 194.45 229.30 194.45 171.15 B22 309.28 306.62 226.30 191.76 226.30 191.76 226.30 191.76 173.27 B23 316.63 313.93 234.79 200.55 234.79 200.55 234.79 200.55 164.77 B31 355.59 352.96 234.82 201.00 234.82 201.00 234.82 201.00 195.59 B32 356.61 353.97 235.94 201.98 235.94 201.98 235.94 201.98 184.97 B33 363.52 360.86 243.57 208.89 243.57 208.89 243.57 208.89 204.10 Fig. 4 Test members of cross-sectional group B; comparison of limit loads Conclusion Ø From Table 4 and Figure 4 it is evident that the theoretical limit loads, calculated according to the relevant standards are different.
Al Ali et al.: Analysis of the resistance of thin-walled cold-formed compressed steel members with closed cross-sections, Part 1: Magazine of Civil Engineering, No 5/2013, p. 38-43
Al Ali, M.
Table 4 Theoretical and experimental limit loads; cross-sectional group B Member Npl,STN Npl,EN Nul,el,STN Nul,el,EN Nu,y,STN Nu,y,EN Nu,z,STN Nu,z,EN Nu,exp [kN] B11 257.27 254.62 217.26 187.42 217.26 187.42 217.26 187.42 159.45 B12 258.02 255.36 217.45 187.51 217.45 187.51 217.45 187.51 165.83 B13 258.19 255.55 216.69 186.66 216.69 186.66 216.69 186.66 158.39 B21 312.08 309.40 229.30 194.45 229.30 194.45 229.30 194.45 171.15 B22 309.28 306.62 226.30 191.76 226.30 191.76 226.30 191.76 173.27 B23 316.63 313.93 234.79 200.55 234.79 200.55 234.79 200.55 164.77 B31 355.59 352.96 234.82 201.00 234.82 201.00 234.82 201.00 195.59 B32 356.61 353.97 235.94 201.98 235.94 201.98 235.94 201.98 184.97 B33 363.52 360.86 243.57 208.89 243.57 208.89 243.57 208.89 204.10 Fig. 4 Test members of cross-sectional group B; comparison of limit loads Conclusion Ø From Table 4 and Figure 4 it is evident that the theoretical limit loads, calculated according to the relevant standards are different.
Al Ali et al.: Analysis of the resistance of thin-walled cold-formed compressed steel members with closed cross-sections, Part 1: Magazine of Civil Engineering, No 5/2013, p. 38-43
Al Ali, M.
Online since: August 2020
Authors: Ahmed Hassan El Shazly, Abdallah Yousef Mohammed Ali, Essam Hares, Kholoud Madih, Marwa Farouk El-Kady, Hesham Ibrahim Elqady
El-Shazly1,3,b, M.F.
El-Kady1,4,c, Abdallah Y.M.
Sayed et al., “Direct urea fuel cells: Challenges and opportunities,” J.
Mirzaei et al., “Electrochemical oxidation of urea on nickel-rhodium nanoparticles/carbon composites,” Electrochim.
El-Shazly, H.
El-Kady1,4,c, Abdallah Y.M.
Sayed et al., “Direct urea fuel cells: Challenges and opportunities,” J.
Mirzaei et al., “Electrochemical oxidation of urea on nickel-rhodium nanoparticles/carbon composites,” Electrochim.
El-Shazly, H.
Online since: May 2011
Authors: Yi Yan Lu, Xiao San Yin, Liang Yi Li, Xue Peng Zhang
Three one story-two-bay RC frames were constructed and tested by Guo Zixiong, et al.
The four optional models are excited respectively by El Centro wave, Taft and artificial-wave.
Excited by El Centro wave b.
Vol.17(1996),p.27 (In Chinese ) [5] Li Yingmin, et al: Earthquake Engineer and Engineer Vibration.
Vol.32(2002),p.460 (In Chinese ) [7] Guo Zixiong, et al: China Civil Engineering Journal.
The four optional models are excited respectively by El Centro wave, Taft and artificial-wave.
Excited by El Centro wave b.
Vol.17(1996),p.27 (In Chinese ) [5] Li Yingmin, et al: Earthquake Engineer and Engineer Vibration.
Vol.32(2002),p.460 (In Chinese ) [7] Guo Zixiong, et al: China Civil Engineering Journal.
Online since: March 2018
Authors: Abderrahim El Attar, Mostafa El Hachloufi, Zine El Abidine Guennoun
Optimal Reinsurance through Minimizing New Risk Measures under Technical Benefit Constraints
EL ATTAR Abderrahim1,a*, EL HACHLOUFI Mostafa2,b
and GUENNOUN Zine El Abidine3,c
1,3Department of Mathematics, Mohamed V University, Faculty of Sciences-Rabat, Morocco.
2Department of Statistics and Mathematics Applied to Economics and Management, Faculty of Juridical Sciences, Economic and Social-Ain Sebaa, Morocco.
That is to say, it satisfies the coherence properties of Artzner & al [5].
[2] Acerbi & al (2002), On the Coherence of Expected Shortfall, Journal of Banking and Finance Vol 26, Iss 7
[6] Balbas & al (2009), Optimal reinsurance with general risk measures, Insurance: Mathematics and Economics 44
[31] Kaas & al (2001), Modern Actuarial Risk Theory, Boston, Dordrecht, London, Kluwer Academic Publishers 28
That is to say, it satisfies the coherence properties of Artzner & al [5].
[2] Acerbi & al (2002), On the Coherence of Expected Shortfall, Journal of Banking and Finance Vol 26, Iss 7
[6] Balbas & al (2009), Optimal reinsurance with general risk measures, Insurance: Mathematics and Economics 44
[31] Kaas & al (2001), Modern Actuarial Risk Theory, Boston, Dordrecht, London, Kluwer Academic Publishers 28