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Online since: April 2009
Authors: M.A. Timirgazin, Anatoly K. Arzhnikov
It was found that the SS state is most likely realized in Fe-Al alloys
for certain concentrations [6-8].
Assuming that the directions of quantization axes ej can be different depending on site, the Hamiltonian can be rewritten in the form: ( )22 ,, ,, 4 1 1 = jj j δjj δj Se∑ ∑ −++ + U Uncct H el σσ σ , (2) where Sj is a spin at site j, nel is a number of electrons per one site.
Then a minimum of the total energy ) ( 1 ) 4 (==),( 2 2 0 0 BBAA F el SS nn n MUH E QkQkkk k Q +++ ++ 〉〈 ∑ εε ψ ε (8) over the Q wave vector and the ψ angle should be found.
Belk et al: Phys.
Reissner et al: Phys.
Assuming that the directions of quantization axes ej can be different depending on site, the Hamiltonian can be rewritten in the form: ( )22 ,, ,, 4 1 1 = jj j δjj δj Se∑ ∑ −++ + U Uncct H el σσ σ , (2) where Sj is a spin at site j, nel is a number of electrons per one site.
Then a minimum of the total energy ) ( 1 ) 4 (==),( 2 2 0 0 BBAA F el SS nn n MUH E QkQkkk k Q +++ ++ 〉〈 ∑ εε ψ ε (8) over the Q wave vector and the ψ angle should be found.
Belk et al: Phys.
Reissner et al: Phys.
Online since: March 2024
Authors: Abdull Hafidz Hassan, Siti Norazian Ismail, Mohd Asmadi, Kamarul Ridwan Zainuddin, Norazah Abd Rahman, Muzakkir Mohammad Zainol
Catalyst testing for Esterification of LA to EL.
(1) Where, EL concentrations, C (mg/L), product final volume, V (L), LA initial weight, W (g), EL molecular mass, MEL (144.17 g/mol), and LA molecular mass, MLA (116.11 g/mol).
The EL yield obtained over LC-400-1 was lower as compared to LCS-400-1.
Referring to Hassan et al. [8], the reduction of acidity led to a decrease in EL yield.
Al-Douri, and S.N.
(1) Where, EL concentrations, C (mg/L), product final volume, V (L), LA initial weight, W (g), EL molecular mass, MEL (144.17 g/mol), and LA molecular mass, MLA (116.11 g/mol).
The EL yield obtained over LC-400-1 was lower as compared to LCS-400-1.
Referring to Hassan et al. [8], the reduction of acidity led to a decrease in EL yield.
Al-Douri, and S.N.
Online since: July 2011
Authors: Lian Guang Jia, Qing Xin Ren, Ya Qing Mo, Hong Liu
Introduction
In recent 10 years, some research have been performed on inclined CFST stub columns, such as Guo et al. [1], Han et al. [2] and Han et al. [3].
The longitudinal and transverse steel fibers are in compression and tension, respectively, and the longitudinal strains (el) and the transverse strains (et) are denoted as positive and negative, respectively.
Δ(mm) Nv(kN) ri1-1 ri1-2 ri2-1 ri2-2 ri3-1 rih1-1 ri3-2 rih1-2 rih2-1 rih2-2 Fig.4 Vertical load (Nv) versus vertical displacement (Δ) relationship Before the steel tube yields, el and et are generally uniformed along the specimen.
el et el et el et ri1-1 ri1-1 ri2-1 ri2-1 rih1-1 rih1-1 et el Nv(kN) ε(με) εy=-1982με εy=1982με Fig. 5 Typical vertical load (Nv) versus strain (ε) relationship Analyses Strength index.
References [1] Yanlin Guo, Luyu Liu, Yonghai Wang, et al.
The longitudinal and transverse steel fibers are in compression and tension, respectively, and the longitudinal strains (el) and the transverse strains (et) are denoted as positive and negative, respectively.
Δ(mm) Nv(kN) ri1-1 ri1-2 ri2-1 ri2-2 ri3-1 rih1-1 ri3-2 rih1-2 rih2-1 rih2-2 Fig.4 Vertical load (Nv) versus vertical displacement (Δ) relationship Before the steel tube yields, el and et are generally uniformed along the specimen.
el et el et el et ri1-1 ri1-1 ri2-1 ri2-1 rih1-1 rih1-1 et el Nv(kN) ε(με) εy=-1982με εy=1982με Fig. 5 Typical vertical load (Nv) versus strain (ε) relationship Analyses Strength index.
References [1] Yanlin Guo, Luyu Liu, Yonghai Wang, et al.
Online since: August 2015
Authors: Khaled Abou-El-Hossein
Abou-El-Hossein
Precision Engineering Laboratory, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa
khaled.abou-el-hossein@nmmu.ac.za
Keywords: Optical plastic components manufacturing, rapidly solidified aluminium, ultra-high precision manufacturing, diamond machining of aluminium.
Studies done by Revel et al. [9] and Liu et al. [10] are examples of research work conducted on studying the quality of precision diamond turning of aluminium.
Abou-El-Hossein,O.
Abou-El-Hossein, O.
Abou-El-Hossein, O.
Studies done by Revel et al. [9] and Liu et al. [10] are examples of research work conducted on studying the quality of precision diamond turning of aluminium.
Abou-El-Hossein,O.
Abou-El-Hossein, O.
Abou-El-Hossein, O.
Online since: May 2015
Authors: Minoru Hanaya, Tôru Kyômen, Sayaka Hasuko, Hiroshi Takashima
Boutinaud et al. have reported that Pr-doped NaNbO3 (NaNbO3:Pr) shows photoluminescence (PL) properties similar to (Ca,Sr)TiO3:Pr [4].
Inset is a photograph of the ELD showing EL.
Red EL was observed on the whole surface of the top electrode.
EL started to be observed at about 18 V ac by naked eyes.
The EL starts to occur at a low electric field of about 0.1 MV cm−1 and the magnitude of the EL luminance is similar to each other [1-3].
Inset is a photograph of the ELD showing EL.
Red EL was observed on the whole surface of the top electrode.
EL started to be observed at about 18 V ac by naked eyes.
The EL starts to occur at a low electric field of about 0.1 MV cm−1 and the magnitude of the EL luminance is similar to each other [1-3].
Online since: June 2008
Authors: Lothar W. Meyer, Lutz Krüger, Matthias Hockauf
The
yield stress at 0.2 % plastic strain (YS), the ultimate tensile stress (UTS), the uniform elongation
(UEL) and the elongation to failure (EL) are compared.
The mechanical properties of the reference material are as follows: YS=370 MPa, UTS=510 MPa, UEL=19.0 % and EL=20.8 %.
This condition shows an increase of YS and UTS of ~35 % and ~10 % respectively, combined with a reasonable EL of 7.8 %.
Accordingly a maximum EL of 13 % is reached after aging for only 15 min at 170°C.
ECA-processing at 180°C yields an increase of YS and UTS of ~40 % and ~15 % respectively, combined with a remarkably EL of 11.6 %.
The mechanical properties of the reference material are as follows: YS=370 MPa, UTS=510 MPa, UEL=19.0 % and EL=20.8 %.
This condition shows an increase of YS and UTS of ~35 % and ~10 % respectively, combined with a reasonable EL of 7.8 %.
Accordingly a maximum EL of 13 % is reached after aging for only 15 min at 170°C.
ECA-processing at 180°C yields an increase of YS and UTS of ~40 % and ~15 % respectively, combined with a remarkably EL of 11.6 %.
Online since: December 2009
Authors: S.G. Shabestari, M.M. Hejazi, M. Bahramifar
On the other hand, numerous
investigations, so far, have explored the role of magnesium in Al-Si and Al-Si-Cu alloys [6-10].
The quality index (Q=UTS+150 log %El) has also been calculated for the investigated alloys to compare the combination of tensile properties. 2.
Modification and grain refinement of the alloys were achieved by adding 0.2 wt.% Al-10Si and 5 wt.% Al-5Ti-1B to the molten metal.
Effect of Mg content and artificial aging on the as-cast and heat treated tensile properties of the alloys (a) YS (b) UTS (c) % El (d) Quality index.
The effect of Mg concentration on the percent elongation to failure (%El) is depicted in Fig. 4c.
The quality index (Q=UTS+150 log %El) has also been calculated for the investigated alloys to compare the combination of tensile properties. 2.
Modification and grain refinement of the alloys were achieved by adding 0.2 wt.% Al-10Si and 5 wt.% Al-5Ti-1B to the molten metal.
Effect of Mg content and artificial aging on the as-cast and heat treated tensile properties of the alloys (a) YS (b) UTS (c) % El (d) Quality index.
The effect of Mg concentration on the percent elongation to failure (%El) is depicted in Fig. 4c.
Online since: May 2012
Authors: Shou Ping Shang, Hua Wei Lu, Xin Ping Zou, Shuang Li, Wan Ruo Chen
Low-frequency excitation shaker was used to put out Gaussian white noise, El-Centro wave and Taft wave.
Through the control system, the vibrator sent Gaussion white noise, El Centro wave and Taft wave [5].
Fig. 3 Amplitude spectrum on the top floor Fig. 4 Vibration exciter’s acceleration time in EL- Centro wave of condition four history in EL- Centro wave of condition four Fig. 5 The acceleration time history on the top Fig. 6 The acceleration time history on the floor in EL- Centro wave of condition four top floor in TF wave of condition six Fig. 7 The steel frame model Fig. 8 Acceleration time history in EL- Centro wave simulated in the SAP2000 of condition one on the top floor of steel frame software structure simulated in the SAP2000 software Fig. 4 and Fig. 5 are the acceleration curve of the schedule for the fourth conditions when the vibrator output EL- Centro wave and Fig. 6 is the acceleration time history for the sixth condition on the top floor when the
Inputting the acceleration in the fourth floor of SAP2000 steel frame model which was picked up on the same floor of the steel frame in soil bin testing , the acceleration responses of the top floor can be gotten of which the peak is shown in Table 5,and the acceleration responses of the top floor when input El-Centro wave under the first condition can be seen in Fig.8.
(in chinese) [6] Shang Shouping, HE Zhiwen, Wang Haidong,“Experimental Investigation on the Effect of the Relative Stiffness Ratio Between Superstructure and Ground Soil on the Fundamental Frequency of Soil-structure System”, JOURNAL OF EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION, Vol.28, issue 5,94-101,2008 (in chinese) [7] Shangshou Ping, Zhu Zhihui, Yu Wenge, et al ,“Soil - box foundation - structure interaction experimental modal analysis”, Hunan University (Natural Science Edition), Vol.31,issue 5,71-76, 2004 (in chinese) [8] Lv Xilin, Chen Yueqing,Chen Bo, et al.
Through the control system, the vibrator sent Gaussion white noise, El Centro wave and Taft wave [5].
Fig. 3 Amplitude spectrum on the top floor Fig. 4 Vibration exciter’s acceleration time in EL- Centro wave of condition four history in EL- Centro wave of condition four Fig. 5 The acceleration time history on the top Fig. 6 The acceleration time history on the floor in EL- Centro wave of condition four top floor in TF wave of condition six Fig. 7 The steel frame model Fig. 8 Acceleration time history in EL- Centro wave simulated in the SAP2000 of condition one on the top floor of steel frame software structure simulated in the SAP2000 software Fig. 4 and Fig. 5 are the acceleration curve of the schedule for the fourth conditions when the vibrator output EL- Centro wave and Fig. 6 is the acceleration time history for the sixth condition on the top floor when the
Inputting the acceleration in the fourth floor of SAP2000 steel frame model which was picked up on the same floor of the steel frame in soil bin testing , the acceleration responses of the top floor can be gotten of which the peak is shown in Table 5,and the acceleration responses of the top floor when input El-Centro wave under the first condition can be seen in Fig.8.
(in chinese) [6] Shang Shouping, HE Zhiwen, Wang Haidong,“Experimental Investigation on the Effect of the Relative Stiffness Ratio Between Superstructure and Ground Soil on the Fundamental Frequency of Soil-structure System”, JOURNAL OF EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION, Vol.28, issue 5,94-101,2008 (in chinese) [7] Shangshou Ping, Zhu Zhihui, Yu Wenge, et al ,“Soil - box foundation - structure interaction experimental modal analysis”, Hunan University (Natural Science Edition), Vol.31,issue 5,71-76, 2004 (in chinese) [8] Lv Xilin, Chen Yueqing,Chen Bo, et al.
Online since: January 2005
Authors: Shi Yong Liu, Ying Fang Zhang, Yuguang Ma, Gang Cheng, Zengqi Xie
The devices have a configuration of ITO/NPB (50nm)/ trans-DPDSB (d)/Alq3 (50-d
nm)/LiF (0.5 nm)/Al, where d changed from 5 to 30 nm, and the corresponding Alq3 layer ranged
from 45 to 20 nm to keep the total thickness of devices constant.
The normalized EL spectra of devices with varied thickness of trans-DPDSB are shown in Figure 2.
It can be seen that the EL spectra features are sensitive to the thickness of the trans-DPDSB layer.
Wavelength (nm) A B C 400 440 480 520 560 600 640 680 0.0 0.2 0.4 0.6 0.8 1.0 Wavelength (nm) PL (Normalized) Fig. 2 EL spectra of device A (straight line), B (dash line) and C (dot line).
WOLEDs have a configuration of ITO/NPB (50nm)/trans-DPDSB (10 nm)/rubrene/Alq3 (40 nm)/LiF (0.5 nm)/Al, with the rubrene thickness varying from 0.05 to 0.15 nm.
The normalized EL spectra of devices with varied thickness of trans-DPDSB are shown in Figure 2.
It can be seen that the EL spectra features are sensitive to the thickness of the trans-DPDSB layer.
Wavelength (nm) A B C 400 440 480 520 560 600 640 680 0.0 0.2 0.4 0.6 0.8 1.0 Wavelength (nm) PL (Normalized) Fig. 2 EL spectra of device A (straight line), B (dash line) and C (dot line).
WOLEDs have a configuration of ITO/NPB (50nm)/trans-DPDSB (10 nm)/rubrene/Alq3 (40 nm)/LiF (0.5 nm)/Al, with the rubrene thickness varying from 0.05 to 0.15 nm.