Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: August 2019
Authors: Mehmet Harbi Calimli, Busra Balli, Esra Kuyuldar, Fatih Sen
Experimental data are used to determine the most appropriate model which is in concordance with the permeant-specific parameters.
Various models analyzing diffusion and penetration mechanisms have been proposed to adapt the experimental data to diverse kinds of PCs.
When the formation permeability is too high, the permeation reduction factor is not important for many polymers.
Moreover, conclusions of researchers yield better information on the effects of polyacrylamide method on flow-induced adsorption and permeability reduction [51]. 5.
Şen, Use of the monodisperse Pt/Ni@rGO nanocomposite synthesized by ultrasonic hydroxide assisted reduction method in electrochemical nonenzymatic glucose detection, Mater.
Various models analyzing diffusion and penetration mechanisms have been proposed to adapt the experimental data to diverse kinds of PCs.
When the formation permeability is too high, the permeation reduction factor is not important for many polymers.
Moreover, conclusions of researchers yield better information on the effects of polyacrylamide method on flow-induced adsorption and permeability reduction [51]. 5.
Şen, Use of the monodisperse Pt/Ni@rGO nanocomposite synthesized by ultrasonic hydroxide assisted reduction method in electrochemical nonenzymatic glucose detection, Mater.
Online since: March 2008
Authors: Sergio Baragetti
[mm]
E(coating) = 100 GPa E(coating) = 200 GPa
E(coating) = 300 GPa E(coating) = 400 GPa
Substrate
surface levelBoth for notched and smooth specimens there is a reduction in the fatigue limit of thin PVD coated
Ti6Al4V specimens.
Such a reduction is in the range 12% ÷ 14%.
The model proposed by Murakami and Endo [22], based on the collection of experimental data for three-dimensional cracks and for short cracks (R=σmin/σmax=-1), gives the following formulation for the evaluation of the threshold stress intensity factor range: ( )( ) 1 3 3 1 3 3 10 120 2 / th R K .
Due to the geometry of the spur gears, which present cut areas that enable the reduction of the mass of the gears, the whole gears, pinion and lead wheel, were modelled by means of a hybrid non-structured mesh made of linear tetrahedral and hexahedral finite elements.
The comparison of data confirms that the surface thin hard coating has a good effect on the fatigue resistance of gears, both for steel and Titanium ones.
Such a reduction is in the range 12% ÷ 14%.
The model proposed by Murakami and Endo [22], based on the collection of experimental data for three-dimensional cracks and for short cracks (R=σmin/σmax=-1), gives the following formulation for the evaluation of the threshold stress intensity factor range: ( )( ) 1 3 3 1 3 3 10 120 2 / th R K .
Due to the geometry of the spur gears, which present cut areas that enable the reduction of the mass of the gears, the whole gears, pinion and lead wheel, were modelled by means of a hybrid non-structured mesh made of linear tetrahedral and hexahedral finite elements.
The comparison of data confirms that the surface thin hard coating has a good effect on the fatigue resistance of gears, both for steel and Titanium ones.
Online since: October 2008
Authors: B. Basu, G.B. Raju
Reduction, reactive and
chemical processes are commonly used methods in the TiB2 production.
Carbothermic reduction of TiO2 and B2O3 powder mixture, reduction of the TiO2 with B4C and metallothermic reduction of TiO2 and B2O3 are some of the reduction processes, which are summarized below.
Carbothermic reduction reaction: TiO2 + B2O3 + 5C → TiB2 + 5CO (1) Boron carbide reduction reaction: 7TiO2 + 5B4C → 7TiB2 + 3B2O3 + 5CO (2) Aluminothermic, silicothermic, magnesiothermic reduction reaction: TiO2 + B2O3 + Al (Si, Mg) → TiB2 + Al2O3 (SiO2, MgO) (3) Borothermic reduction reaction: TiO2 + 4B → TiB2 + B2O2 (4) Reactive process is the simplest method, which involves the direct reaction of elemental precursor Ti or TiH2 and B powders for the production of the high quality TiB2 powders.
Linear fit of the data points represents that the hardness has an exponential dependence on temperature and it follows the following theoretical model.
An important requirement of cathode material for aluminum reduction cells is that the material should be wetted by aluminum.
Carbothermic reduction of TiO2 and B2O3 powder mixture, reduction of the TiO2 with B4C and metallothermic reduction of TiO2 and B2O3 are some of the reduction processes, which are summarized below.
Carbothermic reduction reaction: TiO2 + B2O3 + 5C → TiB2 + 5CO (1) Boron carbide reduction reaction: 7TiO2 + 5B4C → 7TiB2 + 3B2O3 + 5CO (2) Aluminothermic, silicothermic, magnesiothermic reduction reaction: TiO2 + B2O3 + Al (Si, Mg) → TiB2 + Al2O3 (SiO2, MgO) (3) Borothermic reduction reaction: TiO2 + 4B → TiB2 + B2O2 (4) Reactive process is the simplest method, which involves the direct reaction of elemental precursor Ti or TiH2 and B powders for the production of the high quality TiB2 powders.
Linear fit of the data points represents that the hardness has an exponential dependence on temperature and it follows the following theoretical model.
An important requirement of cathode material for aluminum reduction cells is that the material should be wetted by aluminum.
Online since: May 2012
Authors: Philip G. Neudeck, Mehran Mehregany, Kevin M. Speer
A Reduction of Defects in the SiO2-SiC System using the
SiC Vacuum Field-Effect Transistor (VacFET)
Kevin M.
Measured data is given in Tables 1 and 2 for experiments performed in the dark (Fig. 3) as well as under increasing intensities of UV illumination.
It is seen in Table 2 that the VacFET’s interface state density is virtually insensitive to UV illumination, while the MOSFET’s Dit decreases (relative to measurements made in the dark) at moderate and high UV intensities (data is plotted in Fig. 4 for comparison with Fig. 3).
Given that (i) the oxide thickness in these SiC MOSFETs is 190 nm and (ii) only a native oxide can exist in the VacFET (of thickness significantly less than 1 nm), the initial hypothesis that the VacFET would have a lower Dit than the MOSFET is substantiated by this reported data.
Measured data is given in Tables 1 and 2 for experiments performed in the dark (Fig. 3) as well as under increasing intensities of UV illumination.
It is seen in Table 2 that the VacFET’s interface state density is virtually insensitive to UV illumination, while the MOSFET’s Dit decreases (relative to measurements made in the dark) at moderate and high UV intensities (data is plotted in Fig. 4 for comparison with Fig. 3).
Given that (i) the oxide thickness in these SiC MOSFETs is 190 nm and (ii) only a native oxide can exist in the VacFET (of thickness significantly less than 1 nm), the initial hypothesis that the VacFET would have a lower Dit than the MOSFET is substantiated by this reported data.
Online since: September 2013
Authors: Xiao Zhi Ren, Bin Chao Bin
This set of weight is realized by adding all the pxiels that have the same distance to be one input data of BPNN.
Section 3 describes the organization of training data and BPNN structure used in the proposed fast deblurring method.
The organization of training data and BPNN structure The training data of input and output samples should be organized suitably.
In figure 2(b) we propose another effective data organization and mapping method.
Obviously, this mapping method will largely reduce the input data.
Section 3 describes the organization of training data and BPNN structure used in the proposed fast deblurring method.
The organization of training data and BPNN structure The training data of input and output samples should be organized suitably.
In figure 2(b) we propose another effective data organization and mapping method.
Obviously, this mapping method will largely reduce the input data.
Online since: December 2007
Authors: Ivo Dlouhý, Ladislav Jurášek, Miloslav Holzmann
The following
room temperature data characterise the steel: lower yield strength ReL = 570 MPa, ultimate tensile
strength Rm = 880 MPa, total elongation A5 = 21 %, and reduction of area at fracture Z = 56 %.
Data for fracture toughness determination were obtained by using standard compact tension (CT) specimens with thickness of 30 mm.
The gap in fracture toughness data of PC specimens between 60 and 90 MPa.m1/2 is related to the Lüders' flow effect.
Good correspondence of data obtained from CT and PC specimens can be also seen from Fig. 1.
For the pearlitic R7T steel a gap in fracture toughness data of PC specimens between the value of 60 and 90 MPam1/2 is possible to observe.
Data for fracture toughness determination were obtained by using standard compact tension (CT) specimens with thickness of 30 mm.
The gap in fracture toughness data of PC specimens between 60 and 90 MPa.m1/2 is related to the Lüders' flow effect.
Good correspondence of data obtained from CT and PC specimens can be also seen from Fig. 1.
For the pearlitic R7T steel a gap in fracture toughness data of PC specimens between the value of 60 and 90 MPam1/2 is possible to observe.
Online since: March 2014
Authors: Yu Gang Li, Li Ying Chen, Yan Ling Wang, Hong Tao Bai
Meanwhile,the data to be calculated is in huge size and is accumulating rapidly every day.
Meanwhile, there is plenty of data to be processed in real-time and the data is accumulating in drama speed.
One of the methods is to divide the data into parts and computing them in parallel, because the size of remote sensing image data is usually very big and cannot be accommodated and computed efficiently by a single computer [2].
Because the remote sensing image is very huge, there are large amount of data to be addressed.
In the experiments, we use two types of images from experimental data.
Meanwhile, there is plenty of data to be processed in real-time and the data is accumulating in drama speed.
One of the methods is to divide the data into parts and computing them in parallel, because the size of remote sensing image data is usually very big and cannot be accommodated and computed efficiently by a single computer [2].
Because the remote sensing image is very huge, there are large amount of data to be addressed.
In the experiments, we use two types of images from experimental data.
Online since: February 2014
Authors: Wei Lei, Zhe Wang, Jing Xu, Rui Miao
Moreover, using two potential suppliers’ information and data tested the model.
This situation cannot provide effective data support for the later supplier admittance evaluation.
Basic information index data were dimensional, and evaluation standard cannot be universal in different purchasing plate’s varieties.
Other dimensionless indicators which were by collecting ratio data could be in common use, and evaluation standard setting was obtained by modified Delphi method.
Furthermore, two potential suppliers’ information and data were used to verify the model effectiveness.
This situation cannot provide effective data support for the later supplier admittance evaluation.
Basic information index data were dimensional, and evaluation standard cannot be universal in different purchasing plate’s varieties.
Other dimensionless indicators which were by collecting ratio data could be in common use, and evaluation standard setting was obtained by modified Delphi method.
Furthermore, two potential suppliers’ information and data were used to verify the model effectiveness.
Online since: October 2010
Authors: Maxim Z. Shvarts, Andrey A. Soluyanov
A degree of the effect of the light flux characteristics and Fresnel lens geometrical imperfections on validity of the experimental data interpretation has been examined.
The lens chromatic aberration (CA) hinders to satisfaction of this requirement, which, at the wide sunlight spectral range and the finite Sun angular dimension, results in the essential “smearing out” the concentrated radiation in the plane of the SC location and in reduction of the irradiance level on SC due to special and spectral sunlight energy redistribution.
The prospect to use a FL with the curved operating facet generating lines and with the increased profile pitch opens additional feasibilities for fabricating glass FLs (for-example, injection molding technique), which will result in reduction of the lens cost at simultaneous achievement of the higher power efficiency compared to those of the lenses with straight generating lines.
The main material characteristics used as initial data are presented in Table 1, and the calculation results − in Fig. 1.
The main results of the carried out investigations are: - mathematical model based on power ray tracing has been developed for optimizing the FL profile parameters and calculating lens optical-power characteristics with allowing for technological peculiarities of lens manufacture; - the advantageous of lenses with curvilinear operating facets in saving higher concentrating capability in increasing of Fresnel profile step owing to the reduction of losses on the tooth tops and valleys roundings have been demonstrated in comparison with conventional Fresnel lenses with conical operating facets; - the procedure for searching the optimal optical material for lens manufacturing have been presented; - an experimental OPCs have been obtained indoors for developed lens specimens with use of specially designed optical bench; - a good agreement between the measured and simulated data was obtained;on the bases of the experimental results, correction of the calculation model of the concentration
The lens chromatic aberration (CA) hinders to satisfaction of this requirement, which, at the wide sunlight spectral range and the finite Sun angular dimension, results in the essential “smearing out” the concentrated radiation in the plane of the SC location and in reduction of the irradiance level on SC due to special and spectral sunlight energy redistribution.
The prospect to use a FL with the curved operating facet generating lines and with the increased profile pitch opens additional feasibilities for fabricating glass FLs (for-example, injection molding technique), which will result in reduction of the lens cost at simultaneous achievement of the higher power efficiency compared to those of the lenses with straight generating lines.
The main material characteristics used as initial data are presented in Table 1, and the calculation results − in Fig. 1.
The main results of the carried out investigations are: - mathematical model based on power ray tracing has been developed for optimizing the FL profile parameters and calculating lens optical-power characteristics with allowing for technological peculiarities of lens manufacture; - the advantageous of lenses with curvilinear operating facets in saving higher concentrating capability in increasing of Fresnel profile step owing to the reduction of losses on the tooth tops and valleys roundings have been demonstrated in comparison with conventional Fresnel lenses with conical operating facets; - the procedure for searching the optimal optical material for lens manufacturing have been presented; - an experimental OPCs have been obtained indoors for developed lens specimens with use of specially designed optical bench; - a good agreement between the measured and simulated data was obtained;on the bases of the experimental results, correction of the calculation model of the concentration
Online since: October 2011
Authors: Yuee Chen, Nan Xiang Chen, Qing Wu
According to the monitoring datas of Beizhuang in Miyun county.
Each index of index system data were shown in table 1.
Index datas use the monitoring datas from Beijing and BeiZhuang during 2002-2007.
The computation formulas were listed as follows: () (1) (2) Among them: ——sample standard deviation of index section data of item index ——sample mean of index section data of item index ——variably coefficient ——the weight of item index Every year’s indexes were made to be a guideline in section data in the calculation.
This showed that the slightly reduction of ecological efficiency index in 2005 was due to abnormal climate, that did not affect the rising trend of ecological benefit during 2002-2007
Each index of index system data were shown in table 1.
Index datas use the monitoring datas from Beijing and BeiZhuang during 2002-2007.
The computation formulas were listed as follows: () (1) (2) Among them: ——sample standard deviation of index section data of item index ——sample mean of index section data of item index ——variably coefficient ——the weight of item index Every year’s indexes were made to be a guideline in section data in the calculation.
This showed that the slightly reduction of ecological efficiency index in 2005 was due to abnormal climate, that did not affect the rising trend of ecological benefit during 2002-2007