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Online since: December 2013
Authors: E Ping Song, Ke Xin Zhang, Sun Yi, Yan Qiu Lu, Han Lie Hong
After the collision between India and Eurasia, it experienced a long time progressive uplift from south to north (Ma et al., 2005).
The Gangdise - nyenchen tanglha area was rapid thickened and began to uplift at around 21 Ma (Harrison T. et al., 1992); 2.
At ~8Ma, The strongly uplift of Himalaya and Gangdise orogenic belt, the deformation of Haiyuan-Tongxin-Liupanshan belt and the strata fold and a strong thrust nappe of Qilian mountain in tertiary were all related to the effect of the uplift of the plateau (Harrison T. et al., 1992; Shen et al., 2001; Ma et al., 2003).
The strong uplift of the Plateau has changed northern hemisphere atmospheric circulation, inducing the most powerful Asian monsoon circulation system and become the driver and amplifier of the global climate change and (Liu et al., 1998; Ji, et al., 1998; Pan et al., 1995, 1996).
In the winter and spring, including the Tibet Plateau, the Eurasian snow cover increase abnormally, it will lead to the subsequent weakening of the summer monsoon(1999 shi yafeng etal.), and possibly by weakening the east and west tropical atmospheric circulation, and then excite El Niño event which the put the equatorial Pacific as the source.
Online since: May 2019
Authors: Ahmed Hassan El-Shazly, Mohamed Sameh Abdalghany Salem, Mohamed R. El-Marghany, Mohamed Nabil Sabry, Norhan Nady
El-Shazly1,b, Mohamed R.
Celebi et al., "Ultimate permeation across atomically thin porous graphene," Science, vol. 344, no. 6181, pp. 289-292, 2014
Woo et al., "Water desalination using graphene-enhanced electrospun nanofiber membrane via air gap membrane distillation," Journal of Membrane Science, vol. 520, pp. 99-110, 2016.
Online since: March 2011
Authors: Jens Gibmeier, Claudia Fleck, Petra Maier
The relatively high strength of LAE442 is based on a high number of small Al-RE (RE = rare earth) -precipitates.
These Mg-Al-alloys offer a good balance between adequate corrosion resistance, good specific strength and good castability in particular excellent die castability [1].
Instead, lamellar Al-RE- precipitates are formed while binding Al.
The microstructure consists of elongated grains of the hexagonal Mg solid solution crystal and a high number of small Al-RE-precipitates.
Using the value E* evaluated for the strain independent direction y* lattice strains eL were calculated according to [12].
Online since: November 2009
Authors: Kenji Higashida, Masaki Tanaka, Tomotsugu Shimokawa
Tsuji el al [1] reported that intestinal free iron, which was severely deformed by an accumulative roll-bonding process (ARB), demonstrates high strength with high Charpy impact energy especially at low temperatures.
The embedded atom method for aluminium developed by Mishin el al. [12] was used.
Figure 7 shows a schematic drawing of a quasi-three-dimensional model for dislocation dynamics simulation employed in this study, suggested by Roberts et al [23].
The activation energy for dislocation glide used in this study was obtained by Burnner et al [25] as an activation enthalpy for a double kink nucleation along a screw dislocation in iron.
Online since: April 2023
Authors: Marcel Rose M. Mabida, Mervin L. Mamza, Kenneth John G. Solis, Showna Lee T. Sales
The testing approach adhered to the methodology of Ryu et al., in which three different samples were used to provide a reliable average result [8].
In the study of Abu-Saleem et. al, incorporating PP and HDPE as partial replacement to aggregates individually yielded very close compressive strength values [25].
Furthermore, Cole L., et al. suggested that the smooth surface of plastic wastes creates continuous pathways, which increases the blocks' porosity [27].
El Gamasy, A.
Abd El Wahab, and M.
Online since: January 2019
Authors: Ming Guang Wang, Shan Jiang
El-Azab. et al Phase field modeling of the effect of porosity on grain growth kinetics in polycrystalline ceramics.
Xu, et al.
Luo et al.
Liu, et al.
Hu, et al.
Online since: May 2011
Authors: Aniruddha Ghosh, Somnath Chattopadhyaya
Goldak et al. [13] (3-D), first introduced the three dimensional double ellipsoidal moving heat sources.
Nyguyen et al. [14] derived analytical solution for the transient temperature field of the semi infinite body subjected to 3-D power density of a dynamic heat source (such as semi-ellipsoidal and double ellipsoidal heat source).
Penetration (P) Calculation: From the law of conservation of energy we can write W×h+ (Fz, total) ×P + Q =Fdrag,total ×P +El (10) or P= Q +W×h-ElFdrag,total- Fz,total (11) Where, El = Es + Ewm + Ec Es =Energy required for deforming the spherical shape of droplet due to surface tension Ewm =Heat input in the portion of welded plates which is melted due to heat interaction between liquid droplets and welded plates Ec = Heat flow from liquid droplets in conductive and convective heat flow mode Calculation of values of Es , Ewm , mwm: Es = surface tension of liquid droplet (=1900 mN/m) × increase of surface area due to deformation of shape of droplet (increase of surface area of liquid droplet is 2.48 times its initial surface area[21] and, Ewm = Q – Ec = T0Tmmwmcp(s) dT +mwm∆q + TmTdmwmcp(l) dT (12) (Where mwm = mass of the portion of welded plated which is melted due to heat interaction between liquid droplets and welded plates and other values are same
Goldak et al. [13] implies equivalence between the source dimensions and those of the weld pool and suggested that appropriate values of a’, a”, b, c could be obtained by measurement of weld pool geometry as shown in Fig. 4B, where a’=3m'2, a”=3m"2, b=3n2, c=3o2 [31].
[16] Pillai,K.R, Ghosh,A., Chattopadhyaya,S., Sarkar,P.K.: Some Investigations of the Interaction of the Process Parameters of Submerged Arc Welding, Manufacturing Technology & Research, 3[1-2] (2007) [17] Gunaraj, G., Murugan, N., Prediction of Heat-Affected Zone Characteristics in Submerged Arc Welding of Structural Steel Pipes, Welding Research, January 2002, 94 [18] Wang, Y., Tsai, H.L., Impingement of Filler Droplets and Weld Pool Dynamics During Gas Metal Welding Process, International Journal of Heat and Mass Transfer, 44[11] (2001) 2067 [19] Carraugo et al.
Online since: October 2016
Authors: Takayuki Yanagida
There are many kinds of luminescence, such as electroluminescence (EL), cathode-ray luminescence (CL), photoluminescence (PL), chemiluminescence and scintillation.
For example, in the EL, the energy of applied electric field is converted to the luminescence via the transportation and recombination of electrons and holes.
Garnet materials which have a chemical formula of RE3(Al, Ga)5O12 are the most common transparent ceramic scintillator where RE denotes rare earth elements.
The first trial was done to develop transparent ceramic Y1.5Gd1.5Al5O12 [24], and some groups tried to substitute Al to Ga [25].
Fukuda, Growth of perovskite-type oxides (RE, Sr)(Al, Ta)O3 as substrates for GaN epitaxial growth (RE=La, Nd), J.
Online since: December 2024
Authors: Asri Gani, Zetta Fazira, Erwinsyah Putra, Wijaya Pratama, Suraiya Suraiya, Farid Mulana, Mariana Hasyim, Syawaliah Muchtar
Maryudi et al. [4] investigated the impact of activated carbon size variations on methylene blue adsorption, considering concentration and contact time.
Mariana et al. [6] employed activated carbon derived from coconut fiber, modified with SiO2, to create adsorbents for ammonia and methylene blue adsorption.
Additionally, Mariana et al. [7] utilized activated carbon sourced from coconut shells and fly ash for methylene blue adsorption.
El Naeem, A.I.
El-Bardan, H.M.A.
Online since: December 2014
Authors: Jian Ping Wang, Jin Yi Zhong, Zi Chao Li, Xiao Wen Li
[16] Mohammed, R., Green, A., El-Shikh, S. et al.
,Zhao, Y. et al.
,Li L. et al.
,Zhao Y. et al.
[24] Lang, X., Zhong, J., Li L. et al.
Showing 5751 to 5760 of 9913 items