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Online since: October 2014
Authors: Andrey N. Dmitriev, Galina Yu. Vitkina, Oleg Yu. Ivanov, Yury A. Chesnokov, Maxim O. Zolotykh, Kai Chen
., Ekaterinburg, 620002, Russia
3Beijing Liberty International Engineering Technology Co.
Signals of acoustic issue represent acoustic waves which arise in lining because of violation of its continuity, motions of burden materials.
The required temperature is the temperature eutectic materials of melting and can be defined from the chart iron-carbon.
After each change of the furnace profile the amendments are entered into thermal properties of materials near erosion [5].
So for example in China (State Key Laboratory of Advanced Metallurgy and School of Metallurgical and Ecological Engineering of University of Science and Technology Beijing) Dr.
Signals of acoustic issue represent acoustic waves which arise in lining because of violation of its continuity, motions of burden materials.
The required temperature is the temperature eutectic materials of melting and can be defined from the chart iron-carbon.
After each change of the furnace profile the amendments are entered into thermal properties of materials near erosion [5].
So for example in China (State Key Laboratory of Advanced Metallurgy and School of Metallurgical and Ecological Engineering of University of Science and Technology Beijing) Dr.
Online since: January 2012
Authors: Tian Ran Ma, Rui Xue Liu, Feng Jie Zhang, Fei Hu Qin
Identification of Natural Frequency of Bearing Rotor Based on GA-SVM
Tianran Ma1a,Feihu Qin1b,Ruixue Liu1c,Fengjie Zhang2d
1School of Mechanics and Civil Engineering
China University of Mining and Technology,Xuzhou, China
2State Key Laboratory for Geomechanics and Deep Underground Engineering
China University of Mining and Technology,Xuzhou, China amatian_ran@126.com,bqinlang1989@163.com,cruixue1964@163.com,dmatianran@gmail.com
Keywords: bearing rotor; natural frequency; identification; genetic support vector machine (GA–SVM);
Abstract.During identify natural frequency of bearing rotor, due to the complex non-linear relationship among the factors which influence natural frequency, so it is hard to establish a complete and accurate theoretical model.
The natural frequency of the dynamics of engineering structures is the function of structural geometry and material characteristic parameters, which is a complex non-linear relationship with a number of factors.
[2] Tang Kelun,Gao Shuying and Liang Zhangquan: The improving of the finite element method for the calculation of Rotor system natural frequency(Chinese), Journal of Sichuan Institute of Light Chemical Engineering.
[6] WANG chun-lin, ZHOU hao, LI guo-neng, QIU kun-zang, CEN kefa,“the Ash Fusion Point Forecast based on GA-SVM,” Journal of China Electrical Engineering, 2007, vol.27, pp.11-15
[15] ZHANG hao, LUO yi-yong, ZHNG li-ting, CHENG zhu-an, “the Change of Cultivated Land Forecast based on GA-SM, ” Journal of Agricultural Engineering, 2009, vol.25, pp.226-231
The natural frequency of the dynamics of engineering structures is the function of structural geometry and material characteristic parameters, which is a complex non-linear relationship with a number of factors.
[2] Tang Kelun,Gao Shuying and Liang Zhangquan: The improving of the finite element method for the calculation of Rotor system natural frequency(Chinese), Journal of Sichuan Institute of Light Chemical Engineering.
[6] WANG chun-lin, ZHOU hao, LI guo-neng, QIU kun-zang, CEN kefa,“the Ash Fusion Point Forecast based on GA-SVM,” Journal of China Electrical Engineering, 2007, vol.27, pp.11-15
[15] ZHANG hao, LUO yi-yong, ZHNG li-ting, CHENG zhu-an, “the Change of Cultivated Land Forecast based on GA-SM, ” Journal of Agricultural Engineering, 2009, vol.25, pp.226-231
Online since: August 2017
Authors: Tomáš Vopát, Vladimír Šimna, Rudolf Zaujec, Ľubomír Čaplovič, Marián Haršáni, Marcel Kuruc, Jozef Peterka
Effect of Substrate Bias and Coating Thickness on the Properties
of nc-AlCrN/a-SixNy Hard Coating and Determination
of Cutting Parameters
VOPÁT Tomáš1,a*, HARŠÁNI Marián2,b, KURUC Marcel1,c,
ŠIMNA Vladimír1,d, RUDOLF Zaujec1,e, PETERKA Jozef1,f,
ČAPLOVIČ Ľubomír2,g
1Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Department of Machining, Forming and Assembly, Jána Bottu 25, 917 24 Trnava, Slovak Republic
2Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Materials Science, Paulínska 16, 917 24 Trnava, Slovak Republic
atomas.vopat@stuba.sk, bmarian.harsani@stuba.sk, cmarcel.kuruc@stuba.sk, dvladimir.simna@stuba.sk, erudolf.zaujec@stuba.sk, fjozef.peterka@stuba.sk, glubomir.caplovic@stuba.sk
Keywords: Nanocomposite Hard Coatings, Hardness, Cemented Carbide Cutting Inserts, Machining
Abstract.
Materials and Experimental Methods The nanohardness was investigated when the substrate bias and coating thickness vary.
In order to evaporate materials required for the deposition, the DC current was applied on the two cathodes, IAlSi = 110 A and ICr = 70 A.
Zeng, “Thermal Stablility and Oxidation Resistance of CrAlSiN Nano-Structured Coatings Deposited by Lateral Rotating Cathode Arc,” Key Eng.
Procedia Engineering.,100 ( 2015 ) pp. 912 – 917 [10] M.
Materials and Experimental Methods The nanohardness was investigated when the substrate bias and coating thickness vary.
In order to evaporate materials required for the deposition, the DC current was applied on the two cathodes, IAlSi = 110 A and ICr = 70 A.
Zeng, “Thermal Stablility and Oxidation Resistance of CrAlSiN Nano-Structured Coatings Deposited by Lateral Rotating Cathode Arc,” Key Eng.
Procedia Engineering.,100 ( 2015 ) pp. 912 – 917 [10] M.
Online since: September 2011
Authors: Ding He Li, Jian Xin Xu, Lu Chun Zhao
Finite element-based parametric investigations of the stepped-lap repairs to laminated cylindrical shell
Jianxin Xu1, a, Luchun Zhao2, b and Dinghe Li3, c
1,2,3College of Aeronautical Engineering, Civil Aviation University of China, Tianjin, China
aJianxin_xu@eyou.com, bzhaoluchun1987@sina.com, clidinghe@163.com
Keywords: Stepped-lap repair; Finite element model; Composite; laminated cylindrical shell; Stress distribution.
θ z r Clamp end Clamp end Tensile stress Torsional loads Fig. 3 Uniform tensile stress and torsional loads applied to the free end of cylindrical shell with a stepped-lap repair Material properties AS4/3501-6 unidirectional carbon fiber pre-preg material (nominal thickness 0.13 mm) and FM300 film adhesive (nominal thickness 0.13 mm) are considered as the ply and adhesive material, respectively.
Fig. 6 Distributions of the peel stresses along the adhesive bondline under uniform tensile stress for the laminated cylindrical shells Fig. 7 Distributions of the shear stresses along the adhesive bondline under uniform tensile stress for the laminated cylindrical shells Fig. 8 Distributions of the peel stresses along the adhesive bondline under uniform torsional loads for the laminated cylindrical shells Fig. 9 Distributions of the shear stresses along the adhesive bondline under torsional loads for the laminated cylindrical shells Mismatched adherend lay-ups Because the laminate cylindrical shells are made of unidirectional carbon fiber pre-preg material, it is an orthotropic material.
Conventional wisdom dictates that a patch repair must be equal to the parent structure in both material and layup, to return the performance of the repaired structure as close as possible to that of the pristine structure.
Acknowledgement This study was supported by the Natural Science Foundation of China (Grant No. 60979001) and the Key Science and Technology Project of Civil Aviation University of China (Grant No.
θ z r Clamp end Clamp end Tensile stress Torsional loads Fig. 3 Uniform tensile stress and torsional loads applied to the free end of cylindrical shell with a stepped-lap repair Material properties AS4/3501-6 unidirectional carbon fiber pre-preg material (nominal thickness 0.13 mm) and FM300 film adhesive (nominal thickness 0.13 mm) are considered as the ply and adhesive material, respectively.
Fig. 6 Distributions of the peel stresses along the adhesive bondline under uniform tensile stress for the laminated cylindrical shells Fig. 7 Distributions of the shear stresses along the adhesive bondline under uniform tensile stress for the laminated cylindrical shells Fig. 8 Distributions of the peel stresses along the adhesive bondline under uniform torsional loads for the laminated cylindrical shells Fig. 9 Distributions of the shear stresses along the adhesive bondline under torsional loads for the laminated cylindrical shells Mismatched adherend lay-ups Because the laminate cylindrical shells are made of unidirectional carbon fiber pre-preg material, it is an orthotropic material.
Conventional wisdom dictates that a patch repair must be equal to the parent structure in both material and layup, to return the performance of the repaired structure as close as possible to that of the pristine structure.
Acknowledgement This study was supported by the Natural Science Foundation of China (Grant No. 60979001) and the Key Science and Technology Project of Civil Aviation University of China (Grant No.
Online since: October 2009
Authors: Filippo Giannazzo, Vito Raineri, Fabrizio Roccaforte, Ming Hung Weng, Stefano Leone, Jens Eriksson
Silicon
carbide based devices have consequently been studied extensively over the last 20 years, with
ensuing improvements in process engineering and wafer growth technology.
One of the key technology issues currently limiting the performance of such silicon carbide heterostructure devices remains the formation of defective 3C-SiC films.
Gold is normally used as Schottky contact material to n-type 3C-SiC, due to its high theoretical Schottky barrier height of about 1.47 eV [2,5].
Ferro: Advanced Functional Materials Vol. 16 (2006), p. 975
Schröder: Semiconductor Material and Device Characterization, Third Edition (WileyIEEE press, 2006)
One of the key technology issues currently limiting the performance of such silicon carbide heterostructure devices remains the formation of defective 3C-SiC films.
Gold is normally used as Schottky contact material to n-type 3C-SiC, due to its high theoretical Schottky barrier height of about 1.47 eV [2,5].
Ferro: Advanced Functional Materials Vol. 16 (2006), p. 975
Schröder: Semiconductor Material and Device Characterization, Third Edition (WileyIEEE press, 2006)
Online since: July 2005
Authors: Leng Chen, Wei Min Mao, Yong Ning Yu, Ping Yang
Yu
1,d
1
Department of Materials, University of Science and Technology Beijing, China
2
State Key Laboratory of Advanced Metals and Materials, University of Science and Technology
Beijing, China
a
wmmao@mater.ustb.edu.cn, blchen@mater.ustb.edu.cn, cyangp@mater.ustb.edu.cn,
d
yuyongn@sina.com
Keywords: polycrystalline metal, plastic deformation, stress, strain, texture, simulation.
Mao: Crystallographic texture and anisotropy in metal materials (Science Press, Beijing, 2002)
Material Science and Technology Vol. 18 (2002), p. 443 [13] W.
Engineering Simulation Vol. 2 (2001), p. 17 [14] M.G.
Mao: Crystallographic texture and anisotropy in metal materials (Science Press, Beijing, 2002)
Material Science and Technology Vol. 18 (2002), p. 443 [13] W.
Engineering Simulation Vol. 2 (2001), p. 17 [14] M.G.
Online since: June 2015
Authors: N. Harikannan, M. Saravanan, Sridhar S
HARIKANNAN3, c
1 Principal, Sri Subramanya College of Engineering and Technology, Palani, India.
2 Assistant Professor, 3 Assistant Professor, PSNA College of Engineering & Technology,
Dinidgul, India
a drmsaravanan@yahoo.com, b * sri_2855@yahoo.co.in, c kannan_hari_n@yahoo.co.in
Keywords: Two-Stage Hybrid Flow Shop, Makespan, Genetic Algorithm, Simulated Annealing Algorithm
Abstract.
The concept comes from the field of materials science, in which a solid is first melted and then is slowly cooled so that it reaches a thermodynamic equilibrium.
Liao, A note on two-stage hybrid flow shop scheduling with missing operations, Computers and Industrial Engineering, 54 (3) (2008) 695–704
Figielska, Heuristic algorithms for preemptive scheduling in a two-stage hybrid flow shop with additional renewable resources at each stage, Computers & Industrial Engineering, 59 (4) (2010) 509-519
Harikannan, Optimization of realistic multi-stage hybrid flow shop scheduling problems with missing operations using meta-heuristics, International Journal of Engineering and Technology, 6 (1) (2014), 484-496
The concept comes from the field of materials science, in which a solid is first melted and then is slowly cooled so that it reaches a thermodynamic equilibrium.
Liao, A note on two-stage hybrid flow shop scheduling with missing operations, Computers and Industrial Engineering, 54 (3) (2008) 695–704
Figielska, Heuristic algorithms for preemptive scheduling in a two-stage hybrid flow shop with additional renewable resources at each stage, Computers & Industrial Engineering, 59 (4) (2010) 509-519
Harikannan, Optimization of realistic multi-stage hybrid flow shop scheduling problems with missing operations using meta-heuristics, International Journal of Engineering and Technology, 6 (1) (2014), 484-496
Online since: September 2011
Authors: Noor Hidayah Abu, Baba M. Deros, Dzuraidah Abdul Wahab, Mohd Nizam Ab Rahman
CSFs for pre-development implementation of New Product Development in small and medium-sized enterprises
NOOR HIDAYAH ABU, BABA MD DEROS, DZURAIDAH ABD WAHAB,
MOHD NIZAM AB RAHMAN
Department of Mechanical and Materials Engineering,
Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia
dayah@uum.edu.my, hjbaba@eng.ukm.my, dzuraida@eng.ukm.my, mnizam@vlsi.eng.ukm.my
Key words: CSF, pre-development process, new product development, SME
Abstract Success in the pre-development process is important for every organization in order to compete with competitors.
Concurrent engineering 4.
Tippett, Engineering Management Journal, 20 (2008) 36
Kleinschmidt, Engineering Management Review, 11 (1993) 5
Concurrent engineering 4.
Tippett, Engineering Management Journal, 20 (2008) 36
Kleinschmidt, Engineering Management Review, 11 (1993) 5
Online since: August 2010
Authors: Xue Jiang Lai, Rui Li, Yong Dai, Su Yi Huang
But the shell side enhancing heat transfer is always the key research.
In order to save energy and materials, it needs urgently to change traditional baffles form.
"Helical baffles in shell-and-tube heat exchangers, Part I: Experimental verification", Heat Transfer Engineering, vol17, n1,1996, p.93~101
Shell-side heat transfer and pressure drop of shell-and-tube heat exchangers with overlap helical baffles", Journal of Chemical Industry and Engineering(China), vol56,n4,2005, p.598~601
"Contrast experimental research between flower baffle heat exchanger and plate baffle heat exchanger", Chemical Engineering (China), vol 36,n12,2008, p.14~17.
In order to save energy and materials, it needs urgently to change traditional baffles form.
"Helical baffles in shell-and-tube heat exchangers, Part I: Experimental verification", Heat Transfer Engineering, vol17, n1,1996, p.93~101
Shell-side heat transfer and pressure drop of shell-and-tube heat exchangers with overlap helical baffles", Journal of Chemical Industry and Engineering(China), vol56,n4,2005, p.598~601
"Contrast experimental research between flower baffle heat exchanger and plate baffle heat exchanger", Chemical Engineering (China), vol 36,n12,2008, p.14~17.
Online since: June 2014
Authors: Shi Jie Cheng, Wen Xing Sun, Zhao Hui Li
A Highly Reliable Online Monitoring and Real-Time Alarm System for the Insulation Condition of Power Transformers
Wenxing Sun1, a, Zhaohui Li1, b and Shijie Cheng1, c
1State Key Laboratory of Advanced Electromagnetic Engineering and Technology
Huazhong University of Science and Technology
Wuhan, 430074, P.R.
However susceptibility to these events is usually due to some incipient weakness in the insulation system, which may well be evidenced at earlier stages by Partial Discharge (PD) activity [3].Through monitoring of the iron core grounding current, internal insulation moisture levels or faults, foreign particles and oil sediment in the tank and core multi-grounding faults can be detected. [4].When insulation materials within transformers break down, gases are liberated inside the tank.
Accordingly, a higher level “warning” message was sent to the engineers.
[8] Khawaja R H, Blackburn T R., “Partial discharge patterns in oil-impregnated paper and pressboard insulation at high temperature”, 2008 Austra;asian Universities Power Engineering Conference.
High Voltage Engineering, Vol.8, No.36, pp.1985-1980, 2010 [10] Xie Guocai, “Study and Applications on the Method for Integrated Monitoring of Hydro Turbine Generator Sets Based on Team Intelligence,” Ph.D. dissertation, Huazhong University of Science & Technology, Wuhan, P.R.
However susceptibility to these events is usually due to some incipient weakness in the insulation system, which may well be evidenced at earlier stages by Partial Discharge (PD) activity [3].Through monitoring of the iron core grounding current, internal insulation moisture levels or faults, foreign particles and oil sediment in the tank and core multi-grounding faults can be detected. [4].When insulation materials within transformers break down, gases are liberated inside the tank.
Accordingly, a higher level “warning” message was sent to the engineers.
[8] Khawaja R H, Blackburn T R., “Partial discharge patterns in oil-impregnated paper and pressboard insulation at high temperature”, 2008 Austra;asian Universities Power Engineering Conference.
High Voltage Engineering, Vol.8, No.36, pp.1985-1980, 2010 [10] Xie Guocai, “Study and Applications on the Method for Integrated Monitoring of Hydro Turbine Generator Sets Based on Team Intelligence,” Ph.D. dissertation, Huazhong University of Science & Technology, Wuhan, P.R.