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Online since: September 2020
Authors: M. Benhaddou, Zakia Hammouch, F. Latrache, Mohammed Ghammouri
The CuCrZr cylindrical test piece showed a reduction in fatigue life with increasing temperature.
1.
This law is defined as an additive combination of a linear term and a relaxation term, which introduces the non-linearity: Where is the equivalent plastic strain rate, C and γ are the material parameters that are normally calibrated from cyclic test data.
This model is based on the Smith-Watson-Topper (SWT) relation, given in Bannantine et al. [28], and expressed as: where the symbol denotes the MacCauley bracket (i.e., ), FP is the fatigue parameter, is the normal strain range, is the maximum normal stress, is the shear strain range, is the shear stress range, and is a load- and material-dependent constant and is obtained from traction/torsion test data.
We put forward the evolution of the later, according to the set of previously chosen data, that is to say the different temperatures and the imposed constraint.
This law is defined as an additive combination of a linear term and a relaxation term, which introduces the non-linearity: Where is the equivalent plastic strain rate, C and γ are the material parameters that are normally calibrated from cyclic test data.
This model is based on the Smith-Watson-Topper (SWT) relation, given in Bannantine et al. [28], and expressed as: where the symbol denotes the MacCauley bracket (i.e., ), FP is the fatigue parameter, is the normal strain range, is the maximum normal stress, is the shear strain range, is the shear stress range, and is a load- and material-dependent constant and is obtained from traction/torsion test data.
We put forward the evolution of the later, according to the set of previously chosen data, that is to say the different temperatures and the imposed constraint.
Online since: November 2011
Authors: Yuan Bai, Chui Yi Xie, Jian Cheng Qin
The PSD (Power Spectrum Density) analysis reveals the fact when the data traffic bears LDoS attacks, majority of its energy (> 70%) appears at low frequency band (< 20 Hz).
[7] Yu Chen, Kai Hwang: Spectral analysis of TCP flows for defense against Reduction- of-Quality attacks.IEEE International Conference on Communications 2007(2007), p.24-28
[7] Yu Chen, Kai Hwang: Spectral analysis of TCP flows for defense against Reduction- of-Quality attacks.IEEE International Conference on Communications 2007(2007), p.24-28
Online since: January 2012
Authors: You Shan Gao, Ai Hong Wang, Zhi Song, Ze Kun Jin
Engine mathematical model
The dynamic simulation model of the engine build on the data form stable conditions with the interpolation approach.
With time course of the work load simulation, and the vehicle has a certain slope, shows the alternating loads and loads under the effect of slope, speed is dynamic,maximum speed is about 10.6 km / h, the minimum will be reduced to 4.1 km / h, to adapt to the change of the resistance moment, shown as Fig.1 Fig.1 Speed change process Work load and speed affect the turbine torque, compared with the speed we can see, with the speed of volatility, with the turbine torque fluctuations, the trend is that when the speed increases, turbine torque reduction, with full engine speed governor, so as to maintain the work load at the same speed when the basic stability, shown as Fig.2.
With time course of the work load simulation, and the vehicle has a certain slope, shows the alternating loads and loads under the effect of slope, speed is dynamic,maximum speed is about 10.6 km / h, the minimum will be reduced to 4.1 km / h, to adapt to the change of the resistance moment, shown as Fig.1 Fig.1 Speed change process Work load and speed affect the turbine torque, compared with the speed we can see, with the speed of volatility, with the turbine torque fluctuations, the trend is that when the speed increases, turbine torque reduction, with full engine speed governor, so as to maintain the work load at the same speed when the basic stability, shown as Fig.2.
Online since: September 2011
Authors: Jing Zhao, Li Qun Lu
The ranges of the length and diameter on most automobiles were obtained through access to large amounts of data and research(as shown in Table 1).
Fig.2 The size of semi-axis Fig 3 Finite element model Table.2 Rolling process parameters Diameter of pieces Diameter of roller Area reduction Forming angle Spreading angle Transition angle [mm] [mm] [%] [°] [°] [°] 100 1000 71.91 22 8 35 Fig 4.
Fig.2 The size of semi-axis Fig 3 Finite element model Table.2 Rolling process parameters Diameter of pieces Diameter of roller Area reduction Forming angle Spreading angle Transition angle [mm] [mm] [%] [°] [°] [°] 100 1000 71.91 22 8 35 Fig 4.
Online since: August 2013
Authors: Xiao Yu Bu, Ping Liu
Namely according to the parameters of the stepper motor to calculate the pulse equivalent, upper limit of pulse frequency and pulse number of the three largest data
And it makes the control system reliability and stability is improved, cost reduction, and widely used in many industrial fields such as machinery, packaging, chemical has been widely used.
And it makes the control system reliability and stability is improved, cost reduction, and widely used in many industrial fields such as machinery, packaging, chemical has been widely used.
Online since: September 2014
Authors: Hikaru Kobayashi, Koji Yamanaka, Masami Murayama, Daisaku Yaon
The palladium-loaded monolithic anion exchange resin (Pd-M) was prepared by introduction of tetrachloropalladate ions on Monolith X followed by reduction using a reducing agent.
The etching rate of copper films rinsed by UPW are shown in Figure 3 with the data of previous CO2 UPW work [4].
The etching rate of copper films rinsed by UPW are shown in Figure 3 with the data of previous CO2 UPW work [4].
Online since: September 2015
Authors: Paweł Niewiadomski
State-of-the-art
An analysis of the literature data on the modification of concrete with very fine-grained
admixtures shows that mainly nanoparticles of SiO2, Al2O2, CuO, TiO2, ZnO2, Fe2O3, Cr2O3 were used and that rheological properties of such concrete mixtures were studied only in a very few cases.
One can suppose that this will contribute to a reduction in the concrete’s absorptiveness, increase in its impermeability and improvement in its freeze-thaw durability.
One can suppose that this will contribute to a reduction in the concrete’s absorptiveness, increase in its impermeability and improvement in its freeze-thaw durability.
Online since: December 2003
Authors: Gloria Dulce de Almeida Soares, Antonella M. Rossi, Andrea Machado Costa, Reinaldo Calixto
Results and Discussion
Data taken from chemical analyses, Table 1, showed that non-doped sample was a calcium deficient
hydroxyapatite with a Ca/P ratio of 1,60.
This reduction on the crystal dimensions produces a strong increase on sample surface area from 49 to 112 m 2/g and a variation on sample dissolution properties.
This reduction on the crystal dimensions produces a strong increase on sample surface area from 49 to 112 m 2/g and a variation on sample dissolution properties.