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Online since: April 2009
Authors: Carmen Andrade, Jose Fullea, Pedro de Andres, Javier Sanchez
To control and prevent the cracking of steel it is necessary to understand the chemical and physical
properties of hydrogen inside BCC iron.
The adequacy of the theoretical framework and the different convergence thresholds has been tested by computing a number of known properties for clean -iron.
Indeed, important changes in the elastic properties of iron are found in these regions.
DQ is only lower than the thermal one, DT, by a factor of 6.
The residual or mechanical stresses change the diffusion barrier.
The adequacy of the theoretical framework and the different convergence thresholds has been tested by computing a number of known properties for clean -iron.
Indeed, important changes in the elastic properties of iron are found in these regions.
DQ is only lower than the thermal one, DT, by a factor of 6.
The residual or mechanical stresses change the diffusion barrier.
Online since: August 2005
Authors: Toshiyuki Obikawa, Y. Kamata
Hence, there are still difficulties to be solved in
applying MQL to the cutting of difficult-to-machine materials, which cause severe tool damages
resulting in short tool service life due to their material properties of high strength, low thermal
conductivity, high affinity to cutting tools, high strain hardening, etc [4].
Hence the better surface finish in MQL cutting must be attributed to the good lubricating properties of the ester though only a small amount of the ester is supplied to the cutting point.
This suggests that the lubricating property of oil mist, which should affect the tool life favorably, was cancelled by some negative effects owing to the high flow rate of the compressed air.
This suggests that the lubricating property of oil mist was cancelled by the negative effect of the high flow rate of the air.
Hence, the pressure of air supply is the major controlling factor of MQL cutting as far as the finish-turning of Inconel 718 is concerned.
Hence the better surface finish in MQL cutting must be attributed to the good lubricating properties of the ester though only a small amount of the ester is supplied to the cutting point.
This suggests that the lubricating property of oil mist, which should affect the tool life favorably, was cancelled by some negative effects owing to the high flow rate of the compressed air.
This suggests that the lubricating property of oil mist was cancelled by the negative effect of the high flow rate of the air.
Hence, the pressure of air supply is the major controlling factor of MQL cutting as far as the finish-turning of Inconel 718 is concerned.
Online since: July 2020
Authors: Lim Kean Pah, Eydar Tey, Zulkarnain Zainal, Ismayadi Ismail
Hexavalent chromium has been widely used for surface coating due to its extraordinary properties such as good wear and corrosion resistance, high hardness, low coefficient and so on.
Moreover, organic additives played an important roles in enhancement of surface characteristics such as levelling, brightness, anticorrosion, and packing factor [2-4, 8].
In the present work, the effect of addition PEG on the coatings structure, surface morphology, roughness and mechanical properties such as hardness and corrosion resistance have been investigated.
The addition of PEG does not affect the deposition of Cr and C in this case.
Chuang, Role of nickel undercoat and reduction-flame heating on the mechanical properties of Cr-C deposit electroplated from a trivalent chromium based bath, Surf.
Moreover, organic additives played an important roles in enhancement of surface characteristics such as levelling, brightness, anticorrosion, and packing factor [2-4, 8].
In the present work, the effect of addition PEG on the coatings structure, surface morphology, roughness and mechanical properties such as hardness and corrosion resistance have been investigated.
The addition of PEG does not affect the deposition of Cr and C in this case.
Chuang, Role of nickel undercoat and reduction-flame heating on the mechanical properties of Cr-C deposit electroplated from a trivalent chromium based bath, Surf.
Online since: November 2012
Authors: Xiao Ming Yuan, Zhuo Shi Chen, Yong Zhi Wang, Yun Long Wang
Introduction
Soil is a quite complex material with stress-strain behaviors affected by many and various factors, which show significant differences in mechanical characteristics under different loading paths and different gravity stress conditions.
Via centrifugal shakers, the dynamic property and the failure mechanism of soil mass and geotechnical structures can be truly reproduced by exerting dynamic loads of sine waves and seismic waves on models while the same gravity stress as prototype is produced.
Via centrifugal shakers, the dynamic property and the failure mechanism of soil mass and geotechnical structures can be truly reproduced by exerting dynamic loads of sine waves and seismic waves on models while the same gravity stress as prototype is produced.
Online since: December 2010
Authors: Jin Zhang, Xin Chang Luo, Jian Guo Cai, Jian Feng, Xiao Jing Yang
Fig.1 Plane view of the overall structure
Fig.2 Schematic map of the truss string structure
Calculation and Finite element modeling
With the help of the finite element program Midas/Gen [7], three models were established to discuss how the construction processes affect the established structure.
A model including all the parts was firstly built, then the established elements of current construction stage were endowed with real property, at the same time the stiffness of the elements unestablished was set to zero until all the elements were established [9].
The structural state can be divided into three configurations: the zero state, the initial state and the loading state according to the process, construction and mechanical characteristics of truss string structures.
(4) The construction method of projects should be taken into account simultaneously of all factors mentioned in this paper and any other cases such as the cost and the period of construction.
A model including all the parts was firstly built, then the established elements of current construction stage were endowed with real property, at the same time the stiffness of the elements unestablished was set to zero until all the elements were established [9].
The structural state can be divided into three configurations: the zero state, the initial state and the loading state according to the process, construction and mechanical characteristics of truss string structures.
(4) The construction method of projects should be taken into account simultaneously of all factors mentioned in this paper and any other cases such as the cost and the period of construction.
Online since: February 2011
Authors: Ming Zhou, Zhi Gang Chen, Xiao Jiao Lian
Had the original mixed signals not been preprocessed, the accuracy and particularity of diagnosis were bound to be affected.
This paper discussed a kind of criterion based on negative entropy and the fast stationary point algorithm (FastICA) . 1.2 Negative entropy criterion and FastICA algorithm The key factor of ICA model is non-Gaussian quality.
Thereby, under the restraint of , objective function is constituted as follows, (5) Where is the scaled factor.
It is obtained with the statistics property of signal and changes with the manipulative object, but comparatively, DFT、DCT and wavelet [9] adopt relatively fixed radix and have no adaptability to different data. 2.2 Field example Someday in September, the 2# tile of one refinery’s exhaust turbine appears major vibration.
Journal of Mechanical Strength, 2002, 24(4), 493-499 [2] Herault J, Jutten C. in: Space or time adaptive signal processing by neural network models.
This paper discussed a kind of criterion based on negative entropy and the fast stationary point algorithm (FastICA) . 1.2 Negative entropy criterion and FastICA algorithm The key factor of ICA model is non-Gaussian quality.
Thereby, under the restraint of , objective function is constituted as follows, (5) Where is the scaled factor.
It is obtained with the statistics property of signal and changes with the manipulative object, but comparatively, DFT、DCT and wavelet [9] adopt relatively fixed radix and have no adaptability to different data. 2.2 Field example Someday in September, the 2# tile of one refinery’s exhaust turbine appears major vibration.
Journal of Mechanical Strength, 2002, 24(4), 493-499 [2] Herault J, Jutten C. in: Space or time adaptive signal processing by neural network models.
Online since: May 2007
Authors: Ying Chun Liang, Yong Feng Guo, H. Tachikawa, Akira Shimokohbe, Li Hua Lu
Liang
1,d
and A.Shimokohbe
2,e
1
School of Mechanical Engineering, Harbin Institute of Technology, China
2
Precision and Intelligence Laboratory, Tokyo Institute of Technology, Japan
a
lihual@hit.edu.cn, bguoyf@hit.edu.cn, ctachi@pi.titech.ac.jp, dycliang@hit.edu.cn,
e
shimo@pi.titech.ac.jp
Keywords: Nanometer positioning, Friction, Microdynamics, PID controller
Abstract.
This property means that the table can move any small displacement due to the spring deformation.
N is the filter factor for the derivative term.
The value of the filter factor is determined by the designer and is 0 3 6 9 12 15 0 0.02 0.04 0.06 Torque [N•m] Displacement [μm] Position 1 Position 2 Position 3 0 50 100 150 200 250 300 0 0.005 0.01 0.015 0.02 0.025 Torque [N•m] Displacement [nm] (a) (b) typically between 8 and 20.
It can be seen that the closed-loop responses are much less affected by friction.
This property means that the table can move any small displacement due to the spring deformation.
N is the filter factor for the derivative term.
The value of the filter factor is determined by the designer and is 0 3 6 9 12 15 0 0.02 0.04 0.06 Torque [N•m] Displacement [μm] Position 1 Position 2 Position 3 0 50 100 150 200 250 300 0 0.005 0.01 0.015 0.02 0.025 Torque [N•m] Displacement [nm] (a) (b) typically between 8 and 20.
It can be seen that the closed-loop responses are much less affected by friction.
Online since: July 2014
Authors: Yong Tang
A change in muscle mechanical stiffness property as induced by whole-body vibration is not supported [1].
Knee extensor MVC torque decreased significantly and to the same extent after WBV (−23 %) and non-WBV (−25 %), while knee flexor, plantar flexor, and dorsiflexor MVC torque was not affected by the treatments.[3] Petit, Pierre-David et al compared the effects of 6-week whole-body vibration (WBV) training programs with different frequency and peak-to-peak displacement settings on knee extensor muscle strength and power.
This effect appears to result from adaptation of neural factors such as motor unit excitability (recruitment and firing frequency, conduction velocity of excitation) in response to sensory receptor stimulation.
Knee extensor MVC torque decreased significantly and to the same extent after WBV (−23 %) and non-WBV (−25 %), while knee flexor, plantar flexor, and dorsiflexor MVC torque was not affected by the treatments.[3] Petit, Pierre-David et al compared the effects of 6-week whole-body vibration (WBV) training programs with different frequency and peak-to-peak displacement settings on knee extensor muscle strength and power.
This effect appears to result from adaptation of neural factors such as motor unit excitability (recruitment and firing frequency, conduction velocity of excitation) in response to sensory receptor stimulation.
Online since: September 2012
Authors: Yan Ching Jean, Hong Min Chen, J. David van Horn
Thus, PAS can measure the physical and chemical properties for positrons and Ps after being stopped in and in certain locations of the sample.
The binding properties of hollow silica shell materials with uptake and release of Cu2+ and Co2+ were assessed to predict conditions for optimum performance [34].
In other studies, two kinds of human tumor necrosis factors were compared by PAS to correlate to their relative cytotoxicity [96].
The chemical components and physical structure may be different from one sample to another and may be due to the original skin location, patient age, fat percentage, or other factors.
Jean, Correlations between gas permeation and free-volume hole properties of medical plastics.
The binding properties of hollow silica shell materials with uptake and release of Cu2+ and Co2+ were assessed to predict conditions for optimum performance [34].
In other studies, two kinds of human tumor necrosis factors were compared by PAS to correlate to their relative cytotoxicity [96].
The chemical components and physical structure may be different from one sample to another and may be due to the original skin location, patient age, fat percentage, or other factors.
Jean, Correlations between gas permeation and free-volume hole properties of medical plastics.
Online since: January 2022
Authors: Hovsep Hoveyan, Marya Badalyan, Amalya Karapetyan
In the process of hardening of the clinker-free binder, the phase-mineralogical composition of the formed new formations differs from the new formations that are synthesized during hardening of traditional Portland cement, which explains the difference in their properties.
The expediency of using concretes based on a clinker-free binder is explained by a number of factors: the energy intensity per unit of production is reduced 3...4 times, the durability of items is drastically increased due to the reduction in the phase composition of easily corrosive high-basic hydrosilicates, which gives the product high durability, resistance in aggressive environments and other additional operational characteristics[1].
One of the most important distinctive conditions is the activation of the initial substances (components), which affect the duration of mineral formation without changing its nature.
Along with the mechanical forces of adhesion during the hardening process, there is also an intense interaction between the active aluminosilicate component and the monomineral binder.
The expediency of using concretes based on a clinker-free binder is explained by a number of factors: the energy intensity per unit of production is reduced 3...4 times, the durability of items is drastically increased due to the reduction in the phase composition of easily corrosive high-basic hydrosilicates, which gives the product high durability, resistance in aggressive environments and other additional operational characteristics[1].
One of the most important distinctive conditions is the activation of the initial substances (components), which affect the duration of mineral formation without changing its nature.
Along with the mechanical forces of adhesion during the hardening process, there is also an intense interaction between the active aluminosilicate component and the monomineral binder.