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Online since: September 2017
Authors: Xiao Fei Niu, Fu Rong Tu
Controlled Synthesis of Novel Popcorn-Like CeO2 Nanostructures
and their Magnetic Properties
Xiaofei Niu1,a*, Furong Tu1
1Anhui Key Laboratory of Spintronics and Nanomaterials Research, Suzhou University,
Suzhou 234000, Anhui, PR China
aszniuxf0123@126.com
*Corresponding author, email szniuxf0123@126.com
Keywords: Hydrothermal method; Popcorn-like CeO2 nanostructures; Oxygen vacancy; Magnetic properties
Abstract.
Material preparation All the reagents were of analytical grade purity and used as received without further purification before the synthesized process.
Wang, Direct synthesis of CeO2 /SiO2 mesostructured composite materials via sol-gel process, Micropor.
Qu, Surface engineering on CeO2 nanorods by chemical redox etching and their enhanced catalytic activity for CO oxidation, Nanoscale, 7 (2015) 11686-11691
Material preparation All the reagents were of analytical grade purity and used as received without further purification before the synthesized process.
Wang, Direct synthesis of CeO2 /SiO2 mesostructured composite materials via sol-gel process, Micropor.
Qu, Surface engineering on CeO2 nanorods by chemical redox etching and their enhanced catalytic activity for CO oxidation, Nanoscale, 7 (2015) 11686-11691
Online since: October 2015
Authors: De Ren Yang, Xiang Yang Ma, Peng Dong, Xing Bo Liang, Da Xi Tian
Enhanced internal gettering of iron in n/n+ epitaxial silicon wafer: Effect of high temperature rapid thermal annealing in nitrogen ambient
Peng Dong1, Xingbo Liang2, Daxi Tian2, Xiangyang Ma1,a* and Deren Yang1,b+
1 State Key Laboratory of Silicon Materials and School of Material Science and Engineering, Zhejiang University, Hangzhou 310027, China
2 Ningbo QL Electronics Co., Ltd, Gangdong Road, Ningbo Free Trade Zone, Ningbo 315800, People’s Republic of China
a*mxyoung@zju.edu.cn, b+mseyang@zju.edu.cn
Keywords: Rapid thermal processing, Nitrogen-doping, n/n+ epitaxial silicon wafer, Oxygen precipitation, Iron gettering.
Online since: December 2006
Authors: Masahito Ueda, Akira Todoroki
CFRP laminate is composed of electroconductive carbon fibers and insulating resin, it is a
strongly anisotropic electroconductive material.
[2] M.Ueda and A.Todoroki, Key Engineering Materials (to be published)
[2] M.Ueda and A.Todoroki, Key Engineering Materials (to be published)
Online since: October 2004
Authors: Zheng Yi Jiang, Cheng Lu, Giovanni D'Alessio, A. Kiet Tieu, Hong Tao Zhu
Kiet Tieu
1,b, Cheng Lu
1,c, Zhengyi Jiang
1,d, and Giovanni
D'Alessio
2,e
1
Faculty of Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
2
BlueScope Steel, Port Kembla, NSW 2505, Australia
a
hongtao@uow.edu.au, bktieu@uow.edu.au, cchenglu@uow.edu.au, djiang@uow.edu.au,
e
Giovanni.D'Alessio@bhpsteel.com
Keywords: Shape; cold strip mill; principal component analysis; neural network
Abstract.
Previous research on the shape control showed that the shape control process is a non-linear, time-varying and time-delay system, depending on the coupled effects of many factors, such as the variations of strip materials, geometries, roll and strip temperatures etc [1,2].
Because the shape control process in cold strip mill is a non-linear, time-varying and time-delay system, depending on the coupled effects of many parameters, such as the deflection and flattening of the rolls, changes of the bending force, temperature distribution of the rolls and strip, spray water on the rolls, wear of the rolls, material characteristic of the strip and fault of the incoming slab, a total of 50 variables in Table 1 has been introduced to the developed shape prediction model as the selected variables.
Using 23 key principal components, nearly 92% of the dynamic behavior of the shape in cold strip mill has been described. 0 5 10 15 20 25 30 35 40 45 50 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.00982 0.01123 0.01 Fractional variance Components Fig. 2 Fractional variance of each component -50 0 50 100 150 200 250 300 350 400 450 500 10 -3 10 -2 10 -1 10 0 0.0049 0.0024 0.0038 0.0020 Mean square error Epoch Traing without PCA Testing without PCA Trainging with PCA Testing with PCA Fig. 3 Training and testing processes of neural network with and without PCA The training and testing convergence rates of the shape prediction model based on BP neural network with principal component analysis were compared with those without principal component analysis as shown in Fig. 3.
Previous research on the shape control showed that the shape control process is a non-linear, time-varying and time-delay system, depending on the coupled effects of many factors, such as the variations of strip materials, geometries, roll and strip temperatures etc [1,2].
Because the shape control process in cold strip mill is a non-linear, time-varying and time-delay system, depending on the coupled effects of many parameters, such as the deflection and flattening of the rolls, changes of the bending force, temperature distribution of the rolls and strip, spray water on the rolls, wear of the rolls, material characteristic of the strip and fault of the incoming slab, a total of 50 variables in Table 1 has been introduced to the developed shape prediction model as the selected variables.
Using 23 key principal components, nearly 92% of the dynamic behavior of the shape in cold strip mill has been described. 0 5 10 15 20 25 30 35 40 45 50 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.00982 0.01123 0.01 Fractional variance Components Fig. 2 Fractional variance of each component -50 0 50 100 150 200 250 300 350 400 450 500 10 -3 10 -2 10 -1 10 0 0.0049 0.0024 0.0038 0.0020 Mean square error Epoch Traing without PCA Testing without PCA Trainging with PCA Testing with PCA Fig. 3 Training and testing processes of neural network with and without PCA The training and testing convergence rates of the shape prediction model based on BP neural network with principal component analysis were compared with those without principal component analysis as shown in Fig. 3.
Online since: July 2011
Authors: Duo Li Chai, Wu Bin
An efficient catalysis-oxidation method for the degradation of phenol in wastewater
Bin Wu1,a, Duoli Chai2,b
1Huainan Union University, Huainan, Anhui, China
2School of Chemical Engineering, Hefei University of Technology, Hefei, Anhui, China
awubin811030@163.com,bcdl1957@sina.com
Keywords: Fe3O4 nanocrystals, Degradation, Phenol, H2O2, Wastewater treatment
Abstract.
Highly ordered iron-containing mesoporous material, Fe-MCM-41, with 0.5~4 mol% Fe/Si loading was prepared and exhibited high catalytic activity in phenol hydroxylation using H2O2 as oxidant [8], and so on.
Acknowledgements The project was financially supported by Anhui Colleges and Universities Provincial Natural Science key research projects (KJ2008A066).
Journal of Hazardous Materials.
Highly ordered iron-containing mesoporous material, Fe-MCM-41, with 0.5~4 mol% Fe/Si loading was prepared and exhibited high catalytic activity in phenol hydroxylation using H2O2 as oxidant [8], and so on.
Acknowledgements The project was financially supported by Anhui Colleges and Universities Provincial Natural Science key research projects (KJ2008A066).
Journal of Hazardous Materials.
Online since: January 2009
Authors: Gao Feng Zheng, Ling Yun Wang, Wen Wang Li, Li Wei Lin, Dao Heng Sun, Hong Lian Wang
Deposition Characteristics of Direct-Write Suspended
Micro/Nano-Structures
Gaofeng Zheng1, a
, Lingyun Wang
1, b
, Honglian Wang1, c
, Daoheng Sun1, d*,
Wenwang Li1,2,e
,Liwei Lin1,3,f*
1
Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen, Fujian, CHINA
2
Department of Mechanical Engineering, Xiamen University of Technology, Xiamen, Fujian, CHINA
3
Department of Mechanical Engineering, BSAC, University of California at Berkeley, USA
a
zhgffj@yahoo.com.cn, b rabitwangly@yahoo.com.cn, c lianzi442@yahoo.com.cn,
d
sundh@xmu.edu.cn,
e xmlww@xmut.edu.cn, f lwlin@me.berkeley.edu
Keywords: Direct-write, Near-field electrospinning, Micro/Nano-structures, Deposition
Abstract.
Introduction DW technology based on NFES [1] is a versatile top-down fabrication technique, which can fabricate solid nanofiber with diameter from 50nm to 800nm or thin film with line width from 1µm to 20µm [2] from viscous solution, such as organic or bio-material.
At present, realizing the position and morphology controllable deposition of suspended structures is the key for industrial application.
Nanotechnology and Precision Engineering Vol. 6 (2008), p. 20 [3] Chow DC, Johannes MS, Lee WK, Clark RL, Zauscher S and Chilkoti A.
Vol. 29 (2006), p. 291 [8] Dao heng Sun, Liwei Lin, Dezhi Wu and Yinhong Dai. 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems. (2007), p.72 [9] Darrell H.Reneker, Alexander L.
Introduction DW technology based on NFES [1] is a versatile top-down fabrication technique, which can fabricate solid nanofiber with diameter from 50nm to 800nm or thin film with line width from 1µm to 20µm [2] from viscous solution, such as organic or bio-material.
At present, realizing the position and morphology controllable deposition of suspended structures is the key for industrial application.
Nanotechnology and Precision Engineering Vol. 6 (2008), p. 20 [3] Chow DC, Johannes MS, Lee WK, Clark RL, Zauscher S and Chilkoti A.
Vol. 29 (2006), p. 291 [8] Dao heng Sun, Liwei Lin, Dezhi Wu and Yinhong Dai. 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems. (2007), p.72 [9] Darrell H.Reneker, Alexander L.
Online since: September 2005
Authors: Robert Jankowski
Impact Force Spectrum for Damage Assessment of Earthquake-induced
Structural Pounding
Robert Jankowski1
1
Faculty of Civil and Environmental Engineering, Gdańsk University of Technology
ul.
Acknowledgment The study was supported by the European Community under the FP5 Programme, key-action "City of Tomorrow and Cultural Heritage" (Contract No.
Maison: Engineering Structures Vol. 19 (1997), p. 195
[3] Earthquake Engineering Research Institute: EERI Report 95-03 (EERI, USA 1995)
Chopra: Dynamics of Structures: Theory and Applications to Earthquake Engineering (Prentice Hall, USA 1995)
Acknowledgment The study was supported by the European Community under the FP5 Programme, key-action "City of Tomorrow and Cultural Heritage" (Contract No.
Maison: Engineering Structures Vol. 19 (1997), p. 195
[3] Earthquake Engineering Research Institute: EERI Report 95-03 (EERI, USA 1995)
Chopra: Dynamics of Structures: Theory and Applications to Earthquake Engineering (Prentice Hall, USA 1995)
Online since: December 2016
Authors: Jeong Hyun Kim, Nader Nciri, Nam Ho Kim, Nam Jun Cho
Investigation on the Chemical and Physical Properties of Vegetable Oil-Based Polyols for their Potential Application as Asphalt Rejuvenators
Nader Nciri1, a *, Jeonghyun Kim2, b, Namho Kim2, c, Namjun Cho1, d
1School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education, Chungnam 330-708, Republic of Korea
2School of Architectural Engineering, Korea University of Technology and Education,
Chungnam 330-708, Republic of Korea
anader.nciri@koreatech.ac.kr, bjhk16@koreatech.ac.kr, cnhkim@koreatech.ac.kr, dnjuncho@koreatech.ac.kr
Keywords: Vegetable oil-based polyols, Asphalt rejuvenators, FT-IR, TLC-FID, 1H-NMR, 13C-NMR, Physicochemical properties.
Vegetable oil-based polyols are multifunctional starting materials possessing mainly heterogeneous triglyceride structures which enable chemists to design polymers for different applications.
The low-temperature flexibility, stability, evaporation tendencies, aging resistance, and compatibility with technical materials present polyols of vegetable oils as promising rejuvenating agents for aged asphalt binders.
Materials and Methods Materials.
These vegetable oil-based polyols could be used as rejuvenating materials for aged asphalt.
Vegetable oil-based polyols are multifunctional starting materials possessing mainly heterogeneous triglyceride structures which enable chemists to design polymers for different applications.
The low-temperature flexibility, stability, evaporation tendencies, aging resistance, and compatibility with technical materials present polyols of vegetable oils as promising rejuvenating agents for aged asphalt binders.
Materials and Methods Materials.
These vegetable oil-based polyols could be used as rejuvenating materials for aged asphalt.
Online since: February 2020
Authors: Snehanshu Pal, Mouparna Manna
Evaluation of Ni62Nb38 Bimetallic Glass Formation under Hydrostatically Pressurised Quenching
Mouparna Manna1,a, Snehanshu Pal2,b*
1Department of Physics, Birla Institute of Technology, Mesra, India 835215
2Department of Metallurgical and Materials Engineering, National Institute of Technology, Rourkela, India 769008
amouparnamanna26@yahoo.in; bpals@nitrkl.ac.in
*Corresponding Author: Dr.
Introduction Metallic Glasses (MGs), discovered several decades before [1], are a class of materials with no long range translational order and orientational order aswell, and this ordering plays ambiguous role in glass transition [2].
Understanding dynamics of supercooled liquids have attracted substantial scientific exploration which spawned the materials and manufacturing engineering.
Voronoi tessellation analysis proves to be a powerful tool for demonstrating the local atomic ordering in amorphous materials.
Furthermore, the insights derived in this work suggests the potential functional properties of Ni62Nb38 MG and utilisation as Future Materials.
Introduction Metallic Glasses (MGs), discovered several decades before [1], are a class of materials with no long range translational order and orientational order aswell, and this ordering plays ambiguous role in glass transition [2].
Understanding dynamics of supercooled liquids have attracted substantial scientific exploration which spawned the materials and manufacturing engineering.
Voronoi tessellation analysis proves to be a powerful tool for demonstrating the local atomic ordering in amorphous materials.
Furthermore, the insights derived in this work suggests the potential functional properties of Ni62Nb38 MG and utilisation as Future Materials.
Online since: June 2014
Authors: Jozef Gocál, Peter Krušinský, Eva Capková, Miloš Kekeliak
Geometric and Static Analysis of the Historical Truss in Village Belá Dulice
Jozef Gocál1,a*, Peter Krušinský1,b, Eva Capková2,c and Miloš Kekeliak1,d
1 University of Žilina, Faculty of Civil Engineering, Univerzitná 8215/1, 010 26 Žilina, Slovakia
2 University of Žilina, Faculty of Humanities, Univerzitná 8215/1, 010 26 Žilina, Slovakia
a jozef.gocal@fstav.uniza.sk, b krusop@fstav.uniza.sk,
c eva.capkova@fhv.uniza.sk, d milos.kekeliak@fstav.uniza.sk
Key words: historical trusses, geometric analysis, static analysis, numerical model, slip in joints
Abstract.
A numerical model of the roof structure was developed in the finite element analysis (FEA) software SCIA Engineer [4].
Considering the stresses in the roof members and structural parameters being analysed, the isotropic material model with mechanical properties of C24 according to [5] is adopted, which corresponds to the applied type of wood (larch).
Conclusions It can be concluded that the stresses obtained by numerical analysis do not exceed the design strengths of material, defined in standard [9].
A numerical model of the roof structure was developed in the finite element analysis (FEA) software SCIA Engineer [4].
Considering the stresses in the roof members and structural parameters being analysed, the isotropic material model with mechanical properties of C24 according to [5] is adopted, which corresponds to the applied type of wood (larch).
Conclusions It can be concluded that the stresses obtained by numerical analysis do not exceed the design strengths of material, defined in standard [9].