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Online since: June 2010
Authors: Sebastian Mróz
The main purpose of the
performed modification was to determine the factors that contribute to the reduction of slitting pass
wear and energy consumption.
Experimental conditions and simulations The application of the software Forge2007 ® using the thermo-mechanical models requires the definition of boundary conditions, which are decisive to the correctness of numerical analysis.
Therefore, computational results are particularly affected by: the properties of the steel examined, friction conditions, and the kinetic and thermal parameters describing the rolling process.
The roll pass design modification did not affect significantly the magnitude of the energy and force parameters during rolling in Stand 14.
Experimental conditions and simulations The application of the software Forge2007 ® using the thermo-mechanical models requires the definition of boundary conditions, which are decisive to the correctness of numerical analysis.
Therefore, computational results are particularly affected by: the properties of the steel examined, friction conditions, and the kinetic and thermal parameters describing the rolling process.
The roll pass design modification did not affect significantly the magnitude of the energy and force parameters during rolling in Stand 14.
Online since: October 2012
Authors: Fang Jung Shiou, Mu Chiau Xie, Geo Ry Tang, Shui Fa Chuang
The material proportions would affect the characteristics of luminescence [1].
It directly affects the lighting color of LED.
The scaling factor is calculated by equation (2), (2) where D is the actual diameter of the standard circle of Fig. 10, P is the average diameter (with the unit of pixel) of the inside and outside diameter of the circle.
The calculated scaling factor is 1.07µm, meaning the actual physical size of each pixel is 1.07µm.
Mammadov, Suleyman Ozcelik, “Effect of different P/As ratio on the optical and structural properties of GaAs1-xPx/GaAs”, Surface and Interface Analysis, John Wiley & Sons Ltd, Chichester, (2010)1252-1256 [2] Timothy H.
It directly affects the lighting color of LED.
The scaling factor is calculated by equation (2), (2) where D is the actual diameter of the standard circle of Fig. 10, P is the average diameter (with the unit of pixel) of the inside and outside diameter of the circle.
The calculated scaling factor is 1.07µm, meaning the actual physical size of each pixel is 1.07µm.
Mammadov, Suleyman Ozcelik, “Effect of different P/As ratio on the optical and structural properties of GaAs1-xPx/GaAs”, Surface and Interface Analysis, John Wiley & Sons Ltd, Chichester, (2010)1252-1256 [2] Timothy H.
Online since: February 2020
Authors: Mun Seok Choe, Jong Im Kim, Dogyeong Kang
Analysis of Changes in Water Pressure and Vortex during the Aquatic Exercise for Upper Limb in Person by Fluid Flow Simulation
Dogyeong Kang1,a, Munseok Choe1,b, Jong-Im Kim2,c*
1Department of Mechanical Engineering, Graduate school, Kongju National University, 1223-24, Cheonan-daero, Seobuk-gu, Cheonan-si, Chungcheongnam-do, 31080, Republic of Korea
2College of Nursing, Chungnam National University, 266, Munhwaro, Jung-gu, Daejeon, 35015, Republic of Korea
adogyeong93@smail.kongju.ac.kr, bcms9522@naver.com, c*jikim@cnu.ac.kr
Keywords: Aquatic Exercise, Water Pressure, Vortex, Fluid Flow Simulation
Abstract.
Figure 1 3D model of upper limb Table 1 Mesh setting for upper limb aquatic exercise simulation Properties Min size Max face size Nodes Elements Value 0.0001m 0.001m 271,751 1,381,957 Figure 2 Moving motion for upper limb aquatic exercise Table 2 shows the conditions and setup variables used for the analysis.
The reason is thought to be because the thumb and palm are individually affected without being affected by the surrounding regions and the pressures on middle finger and little finger are constantly maintained due to flow interference between other fingers.
Kim, The effects of aquatic exercise program on risk factors of metabolic syndrome and stress in women, Journal of Muscle and Joint Health, (2018), 25(2), 75-83.
Figure 1 3D model of upper limb Table 1 Mesh setting for upper limb aquatic exercise simulation Properties Min size Max face size Nodes Elements Value 0.0001m 0.001m 271,751 1,381,957 Figure 2 Moving motion for upper limb aquatic exercise Table 2 shows the conditions and setup variables used for the analysis.
The reason is thought to be because the thumb and palm are individually affected without being affected by the surrounding regions and the pressures on middle finger and little finger are constantly maintained due to flow interference between other fingers.
Kim, The effects of aquatic exercise program on risk factors of metabolic syndrome and stress in women, Journal of Muscle and Joint Health, (2018), 25(2), 75-83.
Online since: October 2014
Authors: Chun Yan Zhao, Li Wei Zhao, Yu Zhen Pi, Xi Wu, Fang Fei Ma
Care was taken to pick pleurotus eryngii samples that were plump, of good quality, smooth surface, uniform sizes and without signs of mechanical damage[13].The pleurotus eryngii were packed in storage bags and stored.
The phenomenon of the effect of the 0.5 µL/L 1-MCP treatment group was also not effective but this was due to some other underlying factors.
In conclusion, 1-MCP treatment has been successfully used to establish its preservative property on pleurotus eryngii.
Findings of this research also provide some theoretical basis for further research to establish the mechanism of this preservative property.
[18] Ku V V V, Wills R B H. 1-methlcyclopropene can differentially affect postharvest life of strawberries exposed to ethylene[J].
The phenomenon of the effect of the 0.5 µL/L 1-MCP treatment group was also not effective but this was due to some other underlying factors.
In conclusion, 1-MCP treatment has been successfully used to establish its preservative property on pleurotus eryngii.
Findings of this research also provide some theoretical basis for further research to establish the mechanism of this preservative property.
[18] Ku V V V, Wills R B H. 1-methlcyclopropene can differentially affect postharvest life of strawberries exposed to ethylene[J].
Online since: January 2006
Authors: Jui Wen Chang, Ming Chang, Jia Sheng Heh, Jen Cheng Chen
Advanced Process Control Expert System of CVD Membrane Thickness
Based on Neural Network
Ming Chang1, a, Jen-Cheng Chen2,b, Jui-Wen Chang1,c and Jia-Sheng Heh2,d
1
Department of Mechanical Engineering, Chung Yuan Christian University
2
Department of Information and Computer Engineering, Chung Yuan Christian University
#200 Chung-Pei Road, Chung Li, Taiwan 32023, R.O.C.
In general, there are many factors would influence the membrane quality.
The threshold function f( · ) possesses the properties is < ≥ = 0,0 0,1 )( z z zf ������������������������������������������������� It will make the neuron activated if 0u(x)≥ .
Since pressures affect flow field and growth rate of the crystal, they all have complex relationship with CVD process, and this rule means that these small shifts of pressures have positive effect to the thickness of membrane.
Some factors which should affect the thickness of membrane (like flow of gas, pressure, temperature and RF-Power support) are not chosen as the inputs of the neural network, because of the lower correlation value.
In general, there are many factors would influence the membrane quality.
The threshold function f( · ) possesses the properties is < ≥ = 0,0 0,1 )( z z zf ������������������������������������������������� It will make the neuron activated if 0u(x)≥ .
Since pressures affect flow field and growth rate of the crystal, they all have complex relationship with CVD process, and this rule means that these small shifts of pressures have positive effect to the thickness of membrane.
Some factors which should affect the thickness of membrane (like flow of gas, pressure, temperature and RF-Power support) are not chosen as the inputs of the neural network, because of the lower correlation value.
Online since: August 2021
Authors: Juliana Ortiz-Jimenez, Carlos Ivan Cardona, Juan Pablo Gomez, Francy Nelly Jímenez-Garcia, Samuel Roldan-Restrepo, Hector A. Tinoco
Also, it has been shown that other mechanical aspects of bone, such as microarchitecture parameters, bone geometry, and elastic properties, which densitometric techniques cannot properly evaluate.
Effect of long-term formalin preservation on bending properties and fracture toughness of bovine compact bone.
Estudio de muestras óseas descalcificadas mediante factor de disipación dieléctrica.
Bone dielectric property variation as a function of mineralization at microwave frequencies.
Modeling of the dielectric properties of trabecular bone samples at microwave frequency.
Effect of long-term formalin preservation on bending properties and fracture toughness of bovine compact bone.
Estudio de muestras óseas descalcificadas mediante factor de disipación dieléctrica.
Bone dielectric property variation as a function of mineralization at microwave frequencies.
Modeling of the dielectric properties of trabecular bone samples at microwave frequency.
Online since: December 2016
Authors: Vaclav Vitek, Yi Shen Lin, Matous Mrovec
Hence, the bond integrals used in our development are represented by analytical functions similar in form to that of Goodwin, Skinner and Pettifor [16], which are multiplied by screening factors the dependence of which on separation of atoms was established in [15]; for details see [10, 11, 17].
Instead, a physically justified empirical formula is used so that the constructed potential reproduces either experimental or DFT calculated basic properties of the material studied.
Moreover, the non-planar cores have symmetry properties that lead to a number of unexpected asymmetries in the choice of slip planes and orientation dependences of the yield stress of single crystals (for reviews see [21, 37-41]).
The stress components other than the shear stress in the direction parallel to the Burgers vector, called non-glide stresses, exert forces upon these displacements and may thus affect the core structure during loading.
Kunc: Electronic Structure Dynamics and Quantum Structure Properties of Condensed Matter {Plenum Press 1985)
Instead, a physically justified empirical formula is used so that the constructed potential reproduces either experimental or DFT calculated basic properties of the material studied.
Moreover, the non-planar cores have symmetry properties that lead to a number of unexpected asymmetries in the choice of slip planes and orientation dependences of the yield stress of single crystals (for reviews see [21, 37-41]).
The stress components other than the shear stress in the direction parallel to the Burgers vector, called non-glide stresses, exert forces upon these displacements and may thus affect the core structure during loading.
Kunc: Electronic Structure Dynamics and Quantum Structure Properties of Condensed Matter {Plenum Press 1985)
Online since: October 2006
Authors: Tangali S. Sudarshan, Roman Drachev, E. Deyneka, C. Rhodes, J. Schupp
It is
also to be noted that formulation of the heat transfer problems in both cases was analogous to the
real growth run, i.e. only the verified thermal boundary conditions were introduced as constant
values into the domains being simulated (at the peripheries of water-cooled chambers and copper
current connectors), while maximum temperatures inside the growth reactors were determined by
the amount of heat power supplied to the heaters, and temperature dependent material properties of
the internal reactor furniture.
The temperature dependences of the material properties were taken from the product specification lists provided by the manufacturers and/or found in the materials handbooks.
It is appropriate to note here that, depending on the source material properties, the overcooling criterion of the top surface can be estimated according to the onedimensional relationship: (a) (b) Fig. 3.
However, it has been demonstrated [14] that 2" represents the practical limit of SiC ingot length, which can be grown within the conventional furnace design even when the source material availability is not the growth limiting factor.
However, changing the pyrometer opening diameter automatically affects radial gradients in the crucible that might be undesirable if the gradients increase.
The temperature dependences of the material properties were taken from the product specification lists provided by the manufacturers and/or found in the materials handbooks.
It is appropriate to note here that, depending on the source material properties, the overcooling criterion of the top surface can be estimated according to the onedimensional relationship: (a) (b) Fig. 3.
However, it has been demonstrated [14] that 2" represents the practical limit of SiC ingot length, which can be grown within the conventional furnace design even when the source material availability is not the growth limiting factor.
However, changing the pyrometer opening diameter automatically affects radial gradients in the crucible that might be undesirable if the gradients increase.
Online since: September 2013
Authors: Cang Su Xu, Yi Fan Xu, Yang Xie, Dong Hua Fang
Particle movement is described by basic conservation equation, while the single particle motion does not affect the macroscopic behavior of fluid [5].
With the equation (1), we can calculate the particle distribution function which is used to obtain macroscopic property of the fluid body.
The direction and speed of the actual particle movement are continuous, but the single particle does not affect the macro-features of fluid movement.
This simulation method can also be used to further study the effect on spray characteristics from the factors such as flow in nozzle, multi-component factor and others.
Powell, Spray density measurements using X-ray radiography, Proceedings of the Institution of Mechanical Engineers, 21(2007):653-662
With the equation (1), we can calculate the particle distribution function which is used to obtain macroscopic property of the fluid body.
The direction and speed of the actual particle movement are continuous, but the single particle does not affect the macro-features of fluid movement.
This simulation method can also be used to further study the effect on spray characteristics from the factors such as flow in nozzle, multi-component factor and others.
Powell, Spray density measurements using X-ray radiography, Proceedings of the Institution of Mechanical Engineers, 21(2007):653-662
Online since: July 2005
Authors: Alain Hazotte, Adam Morawiec, Jean-Jacques Fundenberger, Emmanuel Bouzy, S.R. Dey
These microstructures receive
a considerable interest, since phase amounts, lamellae colony size, lamellae fineness and γ variant
distribution depend on the α → α2 + γ phase transformation conditions and strongly influence the
mechanical properties.
a) γ/γγ/γγ/γγ/γ interfaces As-Cast (two grains) total number of interfaces 298 Interfaces 180o(T) 120o(OD) 60o(PT) number 161 93 44 Exper. % 54.03 31.21 14.77 Pseudo random % 27.32 36.38 36.30 κκκκ 2 factor 118 b) γ/αγ/αγ/αγ/α2222/γ/γ/γ/γ sequences As-Cast (two grains) total number of sequences 95 γ γ γ γ vs γγγγ misorientation 180 o(T) 120o(OD) 60 o(PT) 0o number 10 29 25 31 Exper. % 10.53 30.53 26.32 32.63 Pseudo random % 21.38 28.46 28.40 21.77 κκκκ 2 factor 10.67 Table 2: Data relative to the nature of γ|γ interfaces (a) and of γ|α2|γ sequences (b) in the as-cast sample 0 10 20 30 40 50 60 180° 120° 60° ZGHNC97-PST ZGHNC97-Ti46Al CHESM02 Ti-48Al-2Cr-2Nb coarse Ti-48Al-2Cr-2Nb fine Interface frequency (%) interface type random random random Figure 3 : Comparison between the γ|γ interface frequencies measured in the present study with results from previous studies and with expected frequencies in case of randomness
Although an excess of twin-boundaries is expected from the measured distribution of γ variants, the χ2-factor calculated from the experimental and pseudo-random distributions (cf.
Obviously, the fact that the internal domain boundaries were also counted in our case can 149 affect the observed percentage of 120° boundaries and, consequently, the frequencies of true- and pseudo-twins.
Although the γ|γ interface statistics are consequently poor, it seems that the measured γ/γ interface distribution tends to a more random distribution, as exemplified in Figure 3, as well as by the low and non-significant value of the χ2-factor.
a) γ/γγ/γγ/γγ/γ interfaces As-Cast (two grains) total number of interfaces 298 Interfaces 180o(T) 120o(OD) 60o(PT) number 161 93 44 Exper. % 54.03 31.21 14.77 Pseudo random % 27.32 36.38 36.30 κκκκ 2 factor 118 b) γ/αγ/αγ/αγ/α2222/γ/γ/γ/γ sequences As-Cast (two grains) total number of sequences 95 γ γ γ γ vs γγγγ misorientation 180 o(T) 120o(OD) 60 o(PT) 0o number 10 29 25 31 Exper. % 10.53 30.53 26.32 32.63 Pseudo random % 21.38 28.46 28.40 21.77 κκκκ 2 factor 10.67 Table 2: Data relative to the nature of γ|γ interfaces (a) and of γ|α2|γ sequences (b) in the as-cast sample 0 10 20 30 40 50 60 180° 120° 60° ZGHNC97-PST ZGHNC97-Ti46Al CHESM02 Ti-48Al-2Cr-2Nb coarse Ti-48Al-2Cr-2Nb fine Interface frequency (%) interface type random random random Figure 3 : Comparison between the γ|γ interface frequencies measured in the present study with results from previous studies and with expected frequencies in case of randomness
Although an excess of twin-boundaries is expected from the measured distribution of γ variants, the χ2-factor calculated from the experimental and pseudo-random distributions (cf.
Obviously, the fact that the internal domain boundaries were also counted in our case can 149 affect the observed percentage of 120° boundaries and, consequently, the frequencies of true- and pseudo-twins.
Although the γ|γ interface statistics are consequently poor, it seems that the measured γ/γ interface distribution tends to a more random distribution, as exemplified in Figure 3, as well as by the low and non-significant value of the χ2-factor.