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Online since: April 2015
Authors: Li Ming Chu, Qie Da Chen, Wang Long Li, Chi Chen Yu, Chi Yang Yeh
Effects of Surface Forces on Pure Squeeze Elastohydrodynamic Lubrication Motion of Circular Contacts with Coated Layer
Li-Ming Chu1, a, Wang-Long Li2, b,*, Qie-Da Chen2, b, Chi-Chen Yu2, b,
Chi-Yang Yeh3, c
1Department of Mechanical Engineering, Southern Taiwan University of Science and Technology, Tainan City 71005, Taiwan, R.O.C.
2Department of Materials Science and Engineering, National Cheng Kung University, Tainan city 70101, Taiwan, R.O.C.
3Department of Mechanical and Automation Engineering, I-Shou University, Kaohsiung City 84001, Taiwan, R.O.C.
TFL is indispensable as a basis of key technology in high technology devices and ultra-precision machines.
ASME Journal of Basic Engineering, 1963; 601-606
TFL is indispensable as a basis of key technology in high technology devices and ultra-precision machines.
ASME Journal of Basic Engineering, 1963; 601-606
Online since: August 2011
Authors: Jian Min Zhu, Peng Du, Ting Ting Fu
Research for RBF Neural Networks Modeling Accuracy of Determining
the Basis Function Center Based on Clustering Methods
Jianmin Zhu1, a, Peng Du1,b and Tingting Fu1,c
1College of Machanical Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
ajmzhu6688@163.com, brobotroc@sina.com, ctingljay@163.com
Keywords: RBF Neural Networks, K-means Clustering, Grey Relational Clustering, Fuzzy Clustering, Radial Basis Function Center, Modeling Accuracy.
In addition, the key factor to network’s performance is not the form of the nonlinear function employed by hidden layer node but the selection of basis function center.
Fung: Neural Networks Vol.9 (1996), p.1597 [3] Jixiang Du: Applied Mathematics and Computation Vol.205 (2008), p.908 [4] Amarnath, M.V: Journal of Engineering Manufacture Vol.233 (2009), p.1575 [5] Yongcheng Sun: Computer Simulation Vol.?
Liu: Computational Materials Science Vol.37 (2006), p.454 [8] Zakrani, Abdelali, Idri, Ali: International Review on Computers and Software Vol.5 (2010), p.516 [9] Roh Seok-Beom: Neurocomputing Vol.73 (2010), p.2464 [10] Bonian Li: Fuzzy Mathematics and Applications (Hefei University of Technology Press, Hefei 2007) .
(In Chinese) [13] Jianmin Zhu: Optical Precision Engineering Vol.8 (2000), p.68 (In Chinese) [14] Xiuling Zhang: Industrial Instrumentation & Automation Vol.3 (2009), p.32 (In Chinese) [15] Ghorbani A, Ghasemi M.R: Journal of Mechanical Engineering Science Vol.255 (2011), p.163 [16] Kagoda Paulo: Physics and Chemistry of the Earth Vol.35 (2010), p.571 [17] Roh Seok-Beom: Fuzzy Sets and Systems Vol.161 (2010), p.1803
In addition, the key factor to network’s performance is not the form of the nonlinear function employed by hidden layer node but the selection of basis function center.
Fung: Neural Networks Vol.9 (1996), p.1597 [3] Jixiang Du: Applied Mathematics and Computation Vol.205 (2008), p.908 [4] Amarnath, M.V: Journal of Engineering Manufacture Vol.233 (2009), p.1575 [5] Yongcheng Sun: Computer Simulation Vol.?
Liu: Computational Materials Science Vol.37 (2006), p.454 [8] Zakrani, Abdelali, Idri, Ali: International Review on Computers and Software Vol.5 (2010), p.516 [9] Roh Seok-Beom: Neurocomputing Vol.73 (2010), p.2464 [10] Bonian Li: Fuzzy Mathematics and Applications (Hefei University of Technology Press, Hefei 2007) .
(In Chinese) [13] Jianmin Zhu: Optical Precision Engineering Vol.8 (2000), p.68 (In Chinese) [14] Xiuling Zhang: Industrial Instrumentation & Automation Vol.3 (2009), p.32 (In Chinese) [15] Ghorbani A, Ghasemi M.R: Journal of Mechanical Engineering Science Vol.255 (2011), p.163 [16] Kagoda Paulo: Physics and Chemistry of the Earth Vol.35 (2010), p.571 [17] Roh Seok-Beom: Fuzzy Sets and Systems Vol.161 (2010), p.1803
Online since: October 2016
Authors: Jan Brüninghaus, Yan Volfson, Jobst Bickendorf, Sigrid Brell-Cokcan
The forming was stopped, when the first material failure occurred.
Duflou, P. van Houtte, Tool Directionality in Contour-Based Incremental Sheet Forming: an Experimental Study on Product Properties and Formability, Key Engineering Materials, 473 (2011) 897-904
Reddy, Experimental study on a new method of double side incremental forming, Proc. of the 2008 International Manufacturing Science and Engineering Conference, ASME, New York, 2008, pp. 601-607
Duflou, P. van Houtte, Tool Directionality in Contour-Based Incremental Sheet Forming: an Experimental Study on Product Properties and Formability, Key Engineering Materials, 473 (2011) 897-904
Reddy, Experimental study on a new method of double side incremental forming, Proc. of the 2008 International Manufacturing Science and Engineering Conference, ASME, New York, 2008, pp. 601-607
Online since: February 2012
Authors: Ze Yuan Yu, Yao Tian, Yu Yang, Ping Gao, Jin Hong Wang, Ya Qin Xu
The application of ultrasound as a laboratory based technique for assisting extraction from plant material is widely published [6].It has been proven to be a desirable method of extraction with many advantages such as increasing extraction yield, reducing solvent usage, economizing power consumption and shortening extraction duration.
Materials and methods Sample preparation.
RSM was used to optimize the conditions for flavonols and anthocyanins extraction of blueberry.The parameters: ultrasonic power, extraction time and liquid to solid ratio were chosen as key variables and designated X1, X2 and X3 respectively and extraction yield (Y) was taken as the response of the design experiments.For statistical calculation, the variables were coded according to the Eq.2 i=1,2,3 (2) Where Xi and xi are the dimensionless and the actual value of the independent variable i, respectively, x0 is the actual value in the center of the domain, andx is the step change.
[9] D.Bas & I.H.Boyacı.Journal of Food Engineering, 2007, 78: 836–845
Biochemical Engineering Journal , 2008, 39: 66–73
Materials and methods Sample preparation.
RSM was used to optimize the conditions for flavonols and anthocyanins extraction of blueberry.The parameters: ultrasonic power, extraction time and liquid to solid ratio were chosen as key variables and designated X1, X2 and X3 respectively and extraction yield (Y) was taken as the response of the design experiments.For statistical calculation, the variables were coded according to the Eq.2 i=1,2,3 (2) Where Xi and xi are the dimensionless and the actual value of the independent variable i, respectively, x0 is the actual value in the center of the domain, andx is the step change.
[9] D.Bas & I.H.Boyacı.Journal of Food Engineering, 2007, 78: 836–845
Biochemical Engineering Journal , 2008, 39: 66–73
Online since: July 2003
Authors: Ya Peng Shen, Chang Chen, N.A. Fleck
Shen
1
1
The State Key Laboratory, School of Civil Engineering and Mechanics
Xi'an Jiaotong University, Xi'an, 710049, P.R.
China 2 Department of Engineering, Cambridge University, Trumpington Street, Cambridge, CB2 1PZ, UK Keywords: metallic foams; size effects; micromechanics modelling Abstract.
The material parameter α denotes the ratio of deviatoric strength eσ to hydrostatic strength mσ , and the normalisation 1 9 2 +α / in Eq. (1) is included in the definition of ˆσ so that it equals the uniaxial stress under uniaxial loading.
It is instructive to attempt a curve fit of Eq (2) to the yield surface loci given in Fig. 3 for foam layers of thickness H=3mm and H=10mm, by treating α and 0σ as material parameters for each thickness.
The cell walls of the honeycombs are taken as elastic-ideally plastic with a yield strain ε σYCY C= =/ .E 0 2%, where σCY is the yield strength and EC is the Young's modulus of the cell wall material.
China 2 Department of Engineering, Cambridge University, Trumpington Street, Cambridge, CB2 1PZ, UK Keywords: metallic foams; size effects; micromechanics modelling Abstract.
The material parameter α denotes the ratio of deviatoric strength eσ to hydrostatic strength mσ , and the normalisation 1 9 2 +α / in Eq. (1) is included in the definition of ˆσ so that it equals the uniaxial stress under uniaxial loading.
It is instructive to attempt a curve fit of Eq (2) to the yield surface loci given in Fig. 3 for foam layers of thickness H=3mm and H=10mm, by treating α and 0σ as material parameters for each thickness.
The cell walls of the honeycombs are taken as elastic-ideally plastic with a yield strain ε σYCY C= =/ .E 0 2%, where σCY is the yield strength and EC is the Young's modulus of the cell wall material.
Online since: December 2013
Authors: Yu Qiang Xia, Li Song, Michel C. Boufadel
China
2Center for Natural Resources Development and Protection (NRDP), Department of Civil and Environmental Engineering, The New Jersey Institute of Technology, Newark, NJ 07102-1824, USA
axiayqcug@gmail.com, bwwwsongli@126.com, cboufadel@gmail.com
Keywords: Shale gas; Unconventional gas; Water resources; Environmental impacts; Policy
Abstract.
Hydraulic Fracturing According to the definition by fracfocus[5], hydraulic fracturing is the use of fluid and material to create or restore small fractures in a formation in order to stimulate production from new and existing oil and gas wells.
The general process of hydraulic fracturing consists of four stages: (1) An acid stage serves to clear cement debris in the wellbore and provide an open conduit for other fracturing fluids by dissolving carbonate minerals and opening fractures near the wellbore, which consisting of several thousand gallons of water mixed with a dilute acid such as hydrochloric or muriatic acid. (2) A pad stage fills the wellbore with the slickwater solution opens the formation and helps to facilitate the flow and placement of proppant material. (3) A proppant sequence stage includes several substages of water combined with proppant material, this stage may collectively use several hundred thousand gallons of water. (4) A flushing stage, consisting of a volume of fresh water sufficient to flush the excess proppant from the wellbore.
China is now embarking upon substantial development of shale gas extraction, but the question of major public concern is whether or not the Chinese government will try to learn from the US experience not only to benefit from the new engineering techniques, but also to minimize the negative impacts of this technology on environmental and human health.
Thus, there is a long way to lay the groundwork for the shale gas revolution, not only lack of key drilling technologies, but also due to the limited fundamental research on its geology data and environmental impacts associated with its policies and regulations.
Hydraulic Fracturing According to the definition by fracfocus[5], hydraulic fracturing is the use of fluid and material to create or restore small fractures in a formation in order to stimulate production from new and existing oil and gas wells.
The general process of hydraulic fracturing consists of four stages: (1) An acid stage serves to clear cement debris in the wellbore and provide an open conduit for other fracturing fluids by dissolving carbonate minerals and opening fractures near the wellbore, which consisting of several thousand gallons of water mixed with a dilute acid such as hydrochloric or muriatic acid. (2) A pad stage fills the wellbore with the slickwater solution opens the formation and helps to facilitate the flow and placement of proppant material. (3) A proppant sequence stage includes several substages of water combined with proppant material, this stage may collectively use several hundred thousand gallons of water. (4) A flushing stage, consisting of a volume of fresh water sufficient to flush the excess proppant from the wellbore.
China is now embarking upon substantial development of shale gas extraction, but the question of major public concern is whether or not the Chinese government will try to learn from the US experience not only to benefit from the new engineering techniques, but also to minimize the negative impacts of this technology on environmental and human health.
Thus, there is a long way to lay the groundwork for the shale gas revolution, not only lack of key drilling technologies, but also due to the limited fundamental research on its geology data and environmental impacts associated with its policies and regulations.
Online since: May 2013
Authors: Da Fang Wu, Shuang Wu, Yue Wu Wang, Zhen Tong Gao, Jia Ling Yang
Fast and High Precision Thermoelectric Potential – Temperature Conversion Method for Aerodynamic Heating Control Systems
Dafang Wua, Shuang Wub, Yuewu Wangc, Zhentong Gao, Jialing Yang
School of Aeronautical Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
awdf1950@163.com; bshuang.wu11@yahoo.com; cwang_yuewu@qq.com;
Key words: sensor; aerodynamic heating; dynamic response; real-time conversion; non-linearity.
Such high temperatures can significantly reduce the ultimate strength of structural material and thus also the carrying capacity of aircraft, as well as cause thermal deformation, reducing aircraft aerodynamics and even influencing flight safety.
In order to ensure the security of high-speed aircraft, and to confirm whether their material and structure can stand up to the thermal shock and high temperature thermal stress experienced during high-speed flight, static and dynamic aerodynamic simulation tests and thermal strength tests must be conducted.
Similarly, the temperature fields of parts of aircraft fuselage surfaces change sharply throughout flight; high-speed aircraft may abruptly accelerate, climb and veer, making the relationship between the material, structural strength/temperature and time very complex [1,2].
Cai: Thermal Engineering Handbook (Machine Industry Press, China 2002).
Such high temperatures can significantly reduce the ultimate strength of structural material and thus also the carrying capacity of aircraft, as well as cause thermal deformation, reducing aircraft aerodynamics and even influencing flight safety.
In order to ensure the security of high-speed aircraft, and to confirm whether their material and structure can stand up to the thermal shock and high temperature thermal stress experienced during high-speed flight, static and dynamic aerodynamic simulation tests and thermal strength tests must be conducted.
Similarly, the temperature fields of parts of aircraft fuselage surfaces change sharply throughout flight; high-speed aircraft may abruptly accelerate, climb and veer, making the relationship between the material, structural strength/temperature and time very complex [1,2].
Cai: Thermal Engineering Handbook (Machine Industry Press, China 2002).
Online since: March 2015
Authors: Guo Ping Liu, Xian Ming Liu
Study of a lithium battery automatic shell control system algorithm
Liu Xianming 1, Liu Guoping 2
(1 Shenzhen Polytechnic electrical engineering college, Guangdong Shenzhen 518055; 2 Nanchang University,
Jiangxi, Nanchang 330031)
Key words: Shell sets; Automatic; Precise;majorization.
A set of shell as shown in figure 1-2 rotary casing when rotate to the highest location, consists of jacket on either side of the rotary machine, grab a conveying mechanism, respectively, and battery into battery core shell, to take material feed mechanism, taking feed mechanism under mechanical positioning and sensor control and wheel clamp is located in the center of the same set of shell, and push the battery core and shell, respectively, on one side of the battery core jig's wheel set of shell is equipped with spring guide, is a set of battery core into the battery shell batteries don't contact with the battery shell inner wall, avoid the probability of bedding bag broken.
The main task of solving multi-objective optimization problem is: there is no preference to find as many representative meets the requirements of Pareto optimal solutions, the uniform distribution of Pareto optimal solution is calculated, according to the design requirements and the engineering practical experience, from the objective to select the most satisfactory results.
At the same time, the NSGA - II algorithm is given all of the same system under different conditions the optimal solution set, do not need to be repeated calculation can be according to the design requirements and the engineering practical experience [7] 32, weigh the selected to meet different requirement of optimization results.
Author introduction: Liu Xianming (1959 -), male, shenzhen vocational and technical college of mechanical and electronic engineering, senior engineer, master's degree.
A set of shell as shown in figure 1-2 rotary casing when rotate to the highest location, consists of jacket on either side of the rotary machine, grab a conveying mechanism, respectively, and battery into battery core shell, to take material feed mechanism, taking feed mechanism under mechanical positioning and sensor control and wheel clamp is located in the center of the same set of shell, and push the battery core and shell, respectively, on one side of the battery core jig's wheel set of shell is equipped with spring guide, is a set of battery core into the battery shell batteries don't contact with the battery shell inner wall, avoid the probability of bedding bag broken.
The main task of solving multi-objective optimization problem is: there is no preference to find as many representative meets the requirements of Pareto optimal solutions, the uniform distribution of Pareto optimal solution is calculated, according to the design requirements and the engineering practical experience, from the objective to select the most satisfactory results.
At the same time, the NSGA - II algorithm is given all of the same system under different conditions the optimal solution set, do not need to be repeated calculation can be according to the design requirements and the engineering practical experience [7] 32, weigh the selected to meet different requirement of optimization results.
Author introduction: Liu Xianming (1959 -), male, shenzhen vocational and technical college of mechanical and electronic engineering, senior engineer, master's degree.
Online since: June 2010
Authors: Peng Wang, Hai Lin Mu
:Journal of Wind Engineering and Industrial Aerodynamics
Vol.62 (1996),p.37-56
:Journal of Wind Engineering and Industrial Aerodynamics Vol. 67&68 (1997),p.293-304
:Journal of Wind Engineering and Industrial Aerodynamics Vol.67&68 (1997),p.885-893
:Journal of Wind Engineering and Industrial Aerodynamics Vol.91 (2003),p.309-329
Mu: Applied Mechanics and Materials Vols. 20-23 (2010),p.1115-1120
:Journal of Wind Engineering and Industrial Aerodynamics Vol. 67&68 (1997),p.293-304
:Journal of Wind Engineering and Industrial Aerodynamics Vol.67&68 (1997),p.885-893
:Journal of Wind Engineering and Industrial Aerodynamics Vol.91 (2003),p.309-329
Mu: Applied Mechanics and Materials Vols. 20-23 (2010),p.1115-1120
Online since: January 2006
Authors: Jian Qin Liu, Ce Zhang
A Theoretical and Experimental Study on Precision Controlling of
Generated Path of an Elastic Linkage
JianQin Liu
1, b
Ce Zhang1, b
1
School of Mechanical Engineering, Tianjin University, Tianjin, China
a
liujianqin@tju.edu.cn, bcezhang41@eyou.com
Keywords: Elastic linkage, generated path, experimental study, optimal method
Abstract: In this paper, generated path control of an elastic linkage is first controlled using a five-bar
linkage with a variable length crank.
The second advocates that advanced composite materials should be employed because of their inherent superior damping characteristics and higher stiffness to weight ratio [2,3].
The variable length crank is the key apparatus.
[6] Yue Shigang, Bai Shixian: Mechanical Science and Technology Vol.13(1994), p.103 (in Chinese) [7] Liu Jianqin, Zhang Ce: China Mechanical Engineering Vol. 10(1999), p. 850 (in Chinese) [8] Liu Jianqin, Zhang Ce, Wang Yuxin: Journal of Mechanical Engineering Vol. 36(2000), p. 41 (in Chinese) [9] F.
Erdman: ASME, Journal of Vibration, Acoustics, Stress, and Reliability in Design Vol. 111(1989), p. 42 [10] Liu Jianqin, Liang De, Zhang Ce: China Mechanical Engineering Vol. 13(2002), p. 512 (in Chinese)
The second advocates that advanced composite materials should be employed because of their inherent superior damping characteristics and higher stiffness to weight ratio [2,3].
The variable length crank is the key apparatus.
[6] Yue Shigang, Bai Shixian: Mechanical Science and Technology Vol.13(1994), p.103 (in Chinese) [7] Liu Jianqin, Zhang Ce: China Mechanical Engineering Vol. 10(1999), p. 850 (in Chinese) [8] Liu Jianqin, Zhang Ce, Wang Yuxin: Journal of Mechanical Engineering Vol. 36(2000), p. 41 (in Chinese) [9] F.
Erdman: ASME, Journal of Vibration, Acoustics, Stress, and Reliability in Design Vol. 111(1989), p. 42 [10] Liu Jianqin, Liang De, Zhang Ce: China Mechanical Engineering Vol. 13(2002), p. 512 (in Chinese)