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Online since: January 2012
Authors: Tian Bao Ma, Guang Lei Fei, Jian Guo Ning
Study on the Numerical Simulation of Explosion and Impact Processes Using PC Cluster System
Guanglei Fei , Jianguo Ning and Tianbao Ma
1State Key Laboratory of Explosion Science and Technology
Beijing Institute of Technology Beijing, China
fgL630@163.com
Keywords: PC cluster; domain decomposition; explosion and impact; MPI
Abstract.
MMIC-3D (Multi-Material In Cell for 3D) is core calculation model of EXPLOSION-3D (Three Dimensional Simulation Software for Explosion and Impact) [1–3] which is developed by our teams independently.
Based on finite difference Euler method, MMIC-3D can handle mixed cells existing three or more materials, which solve the difficult of multi-material disposal in three dimensional by Euler method, and realize numerical simulation for typical problem of the explosion and impact, such as air explosion, explosion in concrete, shaped charge jet etc.
Acknowledgment This work was supported by the National Basic Research Program of China (Grant No. 2010CB832706), and the Foundational of State Key Laboratory of Explosion Science and Technology (Grant No.
The International Journal of Supercomputer Applications and High Performance Computing, 1994, 8(3/4): 165—414
MMIC-3D (Multi-Material In Cell for 3D) is core calculation model of EXPLOSION-3D (Three Dimensional Simulation Software for Explosion and Impact) [1–3] which is developed by our teams independently.
Based on finite difference Euler method, MMIC-3D can handle mixed cells existing three or more materials, which solve the difficult of multi-material disposal in three dimensional by Euler method, and realize numerical simulation for typical problem of the explosion and impact, such as air explosion, explosion in concrete, shaped charge jet etc.
Acknowledgment This work was supported by the National Basic Research Program of China (Grant No. 2010CB832706), and the Foundational of State Key Laboratory of Explosion Science and Technology (Grant No.
The International Journal of Supercomputer Applications and High Performance Computing, 1994, 8(3/4): 165—414
Online since: June 2010
Authors: M.M. Asim, K. Ahmed, Sabah Zaman, Syed Khalid Shah
Texture is typically produced when no epitaxial relationship is
possible between substrate and thin film material for instance during thin film growth on
polycrystalline or amorphous substrates, or with amorphous buffer layers; the detailed features of
texture depends on several deposition parameters, first of all the deposition temperature but also on
the film thickness and growth kinetic [5].
The thermal stress is due to the difference in the thermal expansion coefficients of the coating and the substrate materials.
Scardi, "XRD line broadening and texture of thin films", in science and technology of Thin Films, edited by F.C.
Weber: Handbook of optical material (California: University of California, CRC Press) (2003), p. 117 [18] I.
Okewoye: Research Journal of Applied Sciences, Vol. 11 (2007), p.1170
The thermal stress is due to the difference in the thermal expansion coefficients of the coating and the substrate materials.
Scardi, "XRD line broadening and texture of thin films", in science and technology of Thin Films, edited by F.C.
Weber: Handbook of optical material (California: University of California, CRC Press) (2003), p. 117 [18] I.
Okewoye: Research Journal of Applied Sciences, Vol. 11 (2007), p.1170
Online since: January 2019
Authors: Na Yin, Cai Liang Jing, Hai Bo Li, Ren Sheng Chu, Bin Chen
Introduction
Since the beginning of the 21st century, large-scale ships and marine structural steel, large bridge steel, oil and natural gas transmission pipeline steel have put forward higher requirements on the performance of steel materials.
A large number of studies have shown that refining grains is an effective means to improve the strength and toughness of steel materials, and adding rare earth elements into molten steel is an effective method for refining grains.
Nonferrous Metals Science and Engineering, 2014, 5(6): 53-59
Journal of University of Science and Technology Beijing, 2012, 34(5): 535-539
A large number of studies have shown that refining grains is an effective means to improve the strength and toughness of steel materials, and adding rare earth elements into molten steel is an effective method for refining grains.
Nonferrous Metals Science and Engineering, 2014, 5(6): 53-59
Journal of University of Science and Technology Beijing, 2012, 34(5): 535-539
Online since: October 2011
Authors: Qing Wei Zhang, Jing Cai, She Li Chai, Li Na Gao
Baseline concentrations of trace metals in grassland topsoils
from West Jilin province, Northeast China
Qingwei Zhang1, Sheli Chai2,a, Jing Cai2 and Lina Gao2
1Faculty of Earth Sciences,Jilin University,Changchun 130061,China
2Faculty of Geo-exploration Science and Technology,Jilin University,Changchun 130026,China
achaisl@jlu.edu.cn
Keywords: Baseline concentration,topsoils,trace metals,Multivariant analysis,West Jilin province
Abstract: The objective of this study was to determine the baseline concentrations of trace elements in grassland topsoils from 155 soil sampling sites in West Jilin province, Northeast China, to establish the relationships between the trace metal contents and soil physicochemical properties and major oxide contents and among trace metal concentrations themselves, and to identify the possible sources of trace element in soils.
Material and Methods Site descriptions.
Reagent blanks, standard reference soil samples from the Center of National Standard Reference Material of China(GSS-1,GSS-10, GSS-11 and GSS-14) and internal control samples were also analyzed in order to monitor analytical accuracy and precision.The detection limits for trace elements (mg/kg) were: As 0.6,B 1,Cd 0.01,Co 0.7,Cr 3, Cu 1, Hg 0.005,Mn 4,Mo 0.1,Ni 2, Pb 2,Se 0.01and Zn 2.
The first association included As,Co,Cr,Cu, Mn,Mo,Ni,Zn,Al2O3 and Fe2O3,indicating the trace elements in this group were mainly associated with parent materials of soils such as Al oxides, Fe-Mn oxides and/or with the Al-bearing clay minerals, which implied that the trace elements were mainly derived from lithogenic and pedogenic processes and their concentrations in soils were mainly controlled by abundances of parent materials.
, J.Bech, and B.Sepulveda: Environmental Forensics, Vol.7 (2006),p.369 [12]M.Chen, L.Q.Ma, and G.H.Willie:Journal of Environment Quality,Vol.28(1999),p.1173 [13]A.Ikem, J.Campbell, I.Nyirakabibi, and J.Garth: Environ Monit Assess,Vol.140(2008), p.69 [14]S.Dudka, R.Ponce-Hernandez, and T.C.Hutchinson: Science of the Total Environment, Vol.162 (1995),p.161 [15]NEPA (National Environmental Protection Agency of China): Environmental quality standard for soils (GB 15618-1995).
Material and Methods Site descriptions.
Reagent blanks, standard reference soil samples from the Center of National Standard Reference Material of China(GSS-1,GSS-10, GSS-11 and GSS-14) and internal control samples were also analyzed in order to monitor analytical accuracy and precision.The detection limits for trace elements (mg/kg) were: As 0.6,B 1,Cd 0.01,Co 0.7,Cr 3, Cu 1, Hg 0.005,Mn 4,Mo 0.1,Ni 2, Pb 2,Se 0.01and Zn 2.
The first association included As,Co,Cr,Cu, Mn,Mo,Ni,Zn,Al2O3 and Fe2O3,indicating the trace elements in this group were mainly associated with parent materials of soils such as Al oxides, Fe-Mn oxides and/or with the Al-bearing clay minerals, which implied that the trace elements were mainly derived from lithogenic and pedogenic processes and their concentrations in soils were mainly controlled by abundances of parent materials.
, J.Bech, and B.Sepulveda: Environmental Forensics, Vol.7 (2006),p.369 [12]M.Chen, L.Q.Ma, and G.H.Willie:Journal of Environment Quality,Vol.28(1999),p.1173 [13]A.Ikem, J.Campbell, I.Nyirakabibi, and J.Garth: Environ Monit Assess,Vol.140(2008), p.69 [14]S.Dudka, R.Ponce-Hernandez, and T.C.Hutchinson: Science of the Total Environment, Vol.162 (1995),p.161 [15]NEPA (National Environmental Protection Agency of China): Environmental quality standard for soils (GB 15618-1995).
Online since: December 2015
Authors: Rouhollah Azimirad, Kh. Mohammadi, S. Safa, S. Safalou Moghaddam, M. Rabbani
Experimental Materials
Graphite powder (NGP, 99.9%, 325 mesh), Zn(CH3COO)2·2H2O (99%), H2O2 (30%), sulfuric acid (H2SO4, 98%), chlorohydric acid (HCl, 36%), sodium hydroxide (NaOH) and 4-NP were purchased from Merck Company and all chemicals precursors were used as received without further purification.
However, for the ZnO nanorods with large aspect ratio, the lower direct contact of nanorods (compare to nanoparticles grown at pH of 10 to the underlying carbon sheets and the small contact area) reduces the transfer ability of photogenerated electrons to carbon materials.
We are recently shown that for the carbon materials incorporated semiconductors (eg.
Acknowledgment The authors would like to thank the Iran National Science Foundation for supporting the work.
Azimirad, Ultra-violet photodetection enhancement based on ZnO–graphene composites fabricated by sonochemical method, Journal of Sol-Gel Science and Technology 74 (2015) 499-506
However, for the ZnO nanorods with large aspect ratio, the lower direct contact of nanorods (compare to nanoparticles grown at pH of 10 to the underlying carbon sheets and the small contact area) reduces the transfer ability of photogenerated electrons to carbon materials.
We are recently shown that for the carbon materials incorporated semiconductors (eg.
Acknowledgment The authors would like to thank the Iran National Science Foundation for supporting the work.
Azimirad, Ultra-violet photodetection enhancement based on ZnO–graphene composites fabricated by sonochemical method, Journal of Sol-Gel Science and Technology 74 (2015) 499-506
Online since: December 2012
Authors: Xin Ying Wang, Yu Qi Liu, Yue Bin Feng, Jing Wang, Xiao Jun Xu
Treatment Mechanisms and Operation Conditions of Arsenic Removal from Copper Smelting Effluent using Combined Process of Aeration Micro-electrolysis and Flocculation
Yuqi Liu1,a, Yuebin Feng1,b, Xinying Wang1,c, Jing Wang2,d,
Xiaojun Xu3,e,
1Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China
2 College of Architecture and Civil Engineering , Yunnan Agricultural University, Kunming 650201, China
3 Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China)
aemail:liuyuqi7547@163.com, bemail:fenjys @126.com, cemail:lwg3@163.com, demail:wj0045@163.com, eemail:xuxiaojun88@sina.com,
Keywords: micro-electrolysis, flocculation, smelting effluent, arsenic removal efficiency, treatment mechanisms, operation conditions
Abstract.
Materials and methods Materials.NaOH, SnCl2, KI, K2Cr2O7, (NH4) 2Fe (SO4) 2, 1,10 - phenanthroline, concentrated sulfuric acid, potassium hydrogen phthalate, diethyl dithiocarbamate silver, chloroform, triethylamine , glacial acetic acid, hydrochloric acid, nitric acid (both analytical grade).
More important, some refractory materials also could be deposited directly on the surface of copper.
Acknowledgements This work was supported by Analysis Testing Fund of Kunming University of Science and Technology(2009-111,2009-079) References [1] L.
Hu: Journal of Tianjin Polytechnic University Vol. 28(2009), p.62 [6] H.
Materials and methods Materials.NaOH, SnCl2, KI, K2Cr2O7, (NH4) 2Fe (SO4) 2, 1,10 - phenanthroline, concentrated sulfuric acid, potassium hydrogen phthalate, diethyl dithiocarbamate silver, chloroform, triethylamine , glacial acetic acid, hydrochloric acid, nitric acid (both analytical grade).
More important, some refractory materials also could be deposited directly on the surface of copper.
Acknowledgements This work was supported by Analysis Testing Fund of Kunming University of Science and Technology(2009-111,2009-079) References [1] L.
Hu: Journal of Tianjin Polytechnic University Vol. 28(2009), p.62 [6] H.
Online since: September 2014
Authors: Markus Stana, Manuel Ross, Bogdan Sepiol
Introduction
Numerous properties of materials can be attributed to the movement of single atoms.
Diffusion in amorphous materials.
It works in non-metallic systems, as well as in amorphous or polycrystalline materials.
Nature Materials, 8(9):717--720, 2009
Diffusion in solids: fundamentals, methods, materials, diffusion-controlled processes.
Diffusion in amorphous materials.
It works in non-metallic systems, as well as in amorphous or polycrystalline materials.
Nature Materials, 8(9):717--720, 2009
Diffusion in solids: fundamentals, methods, materials, diffusion-controlled processes.
Online since: November 2011
Authors: Zhong Feng Shi, Wen Rui, Hong Yuan Chen, Yi Fan Feng, Miao Miao Jiang
The 18 batch of Bupleurum scorzoneri folium Willd. from 5 different area(Jilin(J), Sichuan(S), Hubei(HU), Guangxi(GX) and Anhui(A) Province, China) were purchased by the local medical material company, and authenticated by Dr Hongyan Ma, Guangdong Pharmaceutical University.
Table 1 Compounds large differences in different areas of BSFW RT (min) Formula Identification Compound type 2.57 C22H22O12 Cacticin flavone 4.26 C21H20O11 Quercitrin flavone 9.20 C42H68O13 Saikosaponin a/b/d saponin 9.64 C45 H70 O16 Malonylsaikosaponin a/d saponin Acknowledgement It is a project supported by Guangdong Natural Science Foundation (No: 10451022401004962).
[6] Information on http://rcom.univie.ac.at/ [7] Hui Zou, Trevor Hastiey, Robert Tibshirani: Journal of Computational and Graphical Statistics Vol. 15 (2004), p. 1.
Table 1 Compounds large differences in different areas of BSFW RT (min) Formula Identification Compound type 2.57 C22H22O12 Cacticin flavone 4.26 C21H20O11 Quercitrin flavone 9.20 C42H68O13 Saikosaponin a/b/d saponin 9.64 C45 H70 O16 Malonylsaikosaponin a/d saponin Acknowledgement It is a project supported by Guangdong Natural Science Foundation (No: 10451022401004962).
[6] Information on http://rcom.univie.ac.at/ [7] Hui Zou, Trevor Hastiey, Robert Tibshirani: Journal of Computational and Graphical Statistics Vol. 15 (2004), p. 1.
Online since: June 2011
Authors: A.H. Ramezani, M.R. Hantezadeh, M. Ghoranneviss, A.H. Sari
Sari 2, c
1Islamic Azad University, West Tehran branch, Tehran, Iran
2Plasma Physics Center, Science and Research Campus, Islamic Azad University, Tehran, Iran
aramezani_a_h@yahoo.com, bhanteh2001@yahoo.com, c sari@srb.iau.ac.ir
Key words: Ion Implantation, Resistivity, Conductivity, AFM
Abstract.
It is not material to this simple model whether the donor or acceptor levels are close to the conduction band edge.
Journal, Oct., (2000), p.103
It is not material to this simple model whether the donor or acceptor levels are close to the conduction band edge.
Journal, Oct., (2000), p.103
Online since: December 2010
Authors: F. Wei, F.R. Wang
The fully-formed
dimension size and the tool of symbol dimension can control the display of the existing dimension
in the 3D model, and can label the reference dimension size and control the single size's
representation method, which can automatically create the material specification in the drawing.
Journal of Hebei institute of architechural science and technology,1999(9):14-17 [3] Jiang hong, Wei zheng.
Journal of Hebei institute of architechural science and technology,1999(9):14-17 [3] Jiang hong, Wei zheng.