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Online since: April 2019
Authors: Atikom Surintanasarn, Niyom Thamrongananskul
The shear bond strength data was statistically analyzed using one-way ANOVA at a significance level of 0.05.
Data was also evaluated using the Tamhane’s T2 post hoc test.
Fig. 1 Prepared specimen for shear bond strength testing and loading direction Results The data of shear bond strength was analyzed for normal distribution by the Komolgorov-Smirnov test and the data showed normal distribution in all group.
The bond strength increases because the cause of bond reduction is removed and P residue does not affect to the bond.
Yatani, Adhesion procedure for CAD/CAM resin crown bonding: reduction of bond strengths due to artificial saliva contamination, J.
Data was also evaluated using the Tamhane’s T2 post hoc test.
Fig. 1 Prepared specimen for shear bond strength testing and loading direction Results The data of shear bond strength was analyzed for normal distribution by the Komolgorov-Smirnov test and the data showed normal distribution in all group.
The bond strength increases because the cause of bond reduction is removed and P residue does not affect to the bond.
Yatani, Adhesion procedure for CAD/CAM resin crown bonding: reduction of bond strengths due to artificial saliva contamination, J.
Online since: June 2019
Authors: Sergey Sidelnikov, D. Voroshilov, Igor Konstantinov, Ekaterina Lopatina, Olga Yakivyuk, Yuriy Gorbunov, Vadim Bespalov, Edvard Rudnitskiy, Viktor Berngardt, Alexander Durnopyanov
The purpose of this work is to study the joint effect of different conditions of twin roll casting-extruding and two-stage annealing on the structure and properties of rods from an alloy with a content of 0.3% zirconium and 0.2% iron and comparing results with previous research data.
The formation of primary Al3Zr intermetallic compounds is not desirable, however, single clusters found in the structure do not have a significant effect on the mechanical properties of the rods studied, which is confirmed by the data in Table 2.
Two-stage annealing ensures the decomposition of the solid solution supersaturated with zirconium with the release of dispersed Al3Zr particles (Fig. 2, b, spectrum 3, 6 and 7), leads to a less significant decrease in the ultimate tensile strength, increase in ductility and a significant reduction alloying elements in solid solution.
Table 3 gives comparative data on the properties of the bars with previous studies in [8].
Two-stage annealing allows to achieve a significant reduction in electrical resistivity to a minimum value of 0.0290 Ohm‧mm2/m after annealing the rods extruded with drawing ratio of 4.4, while the ultimate tensile strength is 120 MPa.
The formation of primary Al3Zr intermetallic compounds is not desirable, however, single clusters found in the structure do not have a significant effect on the mechanical properties of the rods studied, which is confirmed by the data in Table 2.
Two-stage annealing ensures the decomposition of the solid solution supersaturated with zirconium with the release of dispersed Al3Zr particles (Fig. 2, b, spectrum 3, 6 and 7), leads to a less significant decrease in the ultimate tensile strength, increase in ductility and a significant reduction alloying elements in solid solution.
Table 3 gives comparative data on the properties of the bars with previous studies in [8].
Two-stage annealing allows to achieve a significant reduction in electrical resistivity to a minimum value of 0.0290 Ohm‧mm2/m after annealing the rods extruded with drawing ratio of 4.4, while the ultimate tensile strength is 120 MPa.
Online since: August 2014
Authors: Wen Wen Qiu
Chinese government actively takes its responsibility for carbon emission reduction and promises to reduce China’s carbon dioxide emissions per unit of GDP in 2020 by 40% to 45% compared with that in 2005.
It aims to reveal the long-term equilibrium and short-term fluctuation relationships between them, make clear the impact mechanism on carbon emission by urban construction land expansion in China, and offer reference for China’s efforts to promote sustainable urbanization and relieve the pressure on carbon emission reduction.
Study Method and Data Source Calculation of Carbon Emission Carbon emission mainly refers to that from energy consumption.
Data source The data needed for this study include the area of the land used for urban construction and energy consumption of China.
Fig.1: Changes in the area of the land used for urban construction and the carbon emission of China from 1997 to 2012 Unit Root Test To eliminate the heteroscedasticity of the data, we take natural logarithms for the area of the land used for urban construction and the amount of carbon emission and record them as log u and log c, respectively.
It aims to reveal the long-term equilibrium and short-term fluctuation relationships between them, make clear the impact mechanism on carbon emission by urban construction land expansion in China, and offer reference for China’s efforts to promote sustainable urbanization and relieve the pressure on carbon emission reduction.
Study Method and Data Source Calculation of Carbon Emission Carbon emission mainly refers to that from energy consumption.
Data source The data needed for this study include the area of the land used for urban construction and energy consumption of China.
Fig.1: Changes in the area of the land used for urban construction and the carbon emission of China from 1997 to 2012 Unit Root Test To eliminate the heteroscedasticity of the data, we take natural logarithms for the area of the land used for urban construction and the amount of carbon emission and record them as log u and log c, respectively.
Online since: November 2016
Authors: Hong Yu Zhou, Jun Chang Ci, Cong Kun Yang, Yi Bo Chen
In addition, there are also some researches using the fatigue life of steel after reduction to estimate the fatigue life of reinforced concrete members.
By using a large number of test data, the fatigue equations of different factors were obtained by linear fitting.
Test data proved that the fatigue life and probability distribution of equivalent fatigue life with stress ratio parameters were subject to two-parameter Weibull distribution.
Estimation of fatigue stiffness method is mainly function method to establish the reduction coefficient of bending stiffness.
(3) Reinforced concrete beam fatigue performance of research ideas is mainly based on the cumulative damage theory and test data were obtained by the regression of the cumulative damage model.
By using a large number of test data, the fatigue equations of different factors were obtained by linear fitting.
Test data proved that the fatigue life and probability distribution of equivalent fatigue life with stress ratio parameters were subject to two-parameter Weibull distribution.
Estimation of fatigue stiffness method is mainly function method to establish the reduction coefficient of bending stiffness.
(3) Reinforced concrete beam fatigue performance of research ideas is mainly based on the cumulative damage theory and test data were obtained by the regression of the cumulative damage model.
Online since: January 2021
Authors: Rukman Hertadi, Wa Ode Sri Rizki, Zuhdina Sabiqoh, Enny Ratnaningsih
According to plastic waste generation data in 2010, the waste generation in the United States and Japan reached 0.34 and 0.17 kg/person/day, respectively, whereas the waste generation in India, Malaysia, and Indonesia were 0.01, 0.2, and 0.06 kg/person/day respectively [1].
The DNA sequence data of bacterial 16S rRNA were analyzed using Basic Local Alignment Search Tool (BLAST).
Cell pellets were collected and freeze dried to obtain dry cell weight data of bacteria.
Data analysis included production of bioplastics (g/L) and production efficiency (%, w/w).
From TGA curves, the polymer melting point is obtained on the basis of the reduction in the total mass of the polymer due to an increase in temperature [18].
The DNA sequence data of bacterial 16S rRNA were analyzed using Basic Local Alignment Search Tool (BLAST).
Cell pellets were collected and freeze dried to obtain dry cell weight data of bacteria.
Data analysis included production of bioplastics (g/L) and production efficiency (%, w/w).
From TGA curves, the polymer melting point is obtained on the basis of the reduction in the total mass of the polymer due to an increase in temperature [18].
Online since: August 2017
Authors: Robert Bail
However, there is a lack of data and legislation regarding potentially new applications as additives in biofabrication processes.
The load vs. extension data was recorded and calculated by the testing equipment.
The working curves of all four data sets intercepted the exposure axis at around 51 mJ/cm2, which is the minimum energy Ec of the suggested material composition and hence independent of the dye concentration.
The reduction in modulus went along with a decrease in compressive strength from 12.5 MPa down to 9.4 MPa, which amounts to 25%.
The strength data was however less consistent as indicated by slightly higher standard deviations, which was due to a noticeable difference in strength between the two specimen sets of three parts each.
The load vs. extension data was recorded and calculated by the testing equipment.
The working curves of all four data sets intercepted the exposure axis at around 51 mJ/cm2, which is the minimum energy Ec of the suggested material composition and hence independent of the dye concentration.
The reduction in modulus went along with a decrease in compressive strength from 12.5 MPa down to 9.4 MPa, which amounts to 25%.
The strength data was however less consistent as indicated by slightly higher standard deviations, which was due to a noticeable difference in strength between the two specimen sets of three parts each.
Online since: December 2010
Authors: Dong Hai Liu, Jiang Zheng, Zi Long Li
At the start of every cycle, random input parameters of meeting specific distribution can be obtained according to some specific sampling method .To avoid simulation cycle repeated problem caused by data points concentration in direct sampling, this paper adopts Latin hypercube sampling method (LHS)[7], to sample random parameters.
Measured data showed that the stress distribution of the stress area is: the maximal horizontal stress is greater than the minimal horizontal stress stress, simultaneously greater than vertical stress (that is SH>Sh>Sv).
Table 1 Load of all kind surrounding rock during construction surrounding rock types largest burry depth external water head (m) external water head reduction factor b lateral pressure (MPa) 0.5 reduction factor of grouting pressure(MPa) Ⅱ 122.43 96.63 0.3 4.1 0.2 Ⅲ 51.45 32.5 0.5 2.5 0.2 Ⅳ 35.44 21.78 0.7 2.4 0.2 Ⅴ 33 21.87 0.85 0.9 0.2 Random parameters and their distribution.
Based on project geology exploration data, the statistical characteristics of material parameters are represented as Table 2.
Because of lacking of overbreak and underbreak statistical data, random factors considered in this paper are finite.
Measured data showed that the stress distribution of the stress area is: the maximal horizontal stress is greater than the minimal horizontal stress stress, simultaneously greater than vertical stress (that is SH>Sh>Sv).
Table 1 Load of all kind surrounding rock during construction surrounding rock types largest burry depth external water head (m) external water head reduction factor b lateral pressure (MPa) 0.5 reduction factor of grouting pressure(MPa) Ⅱ 122.43 96.63 0.3 4.1 0.2 Ⅲ 51.45 32.5 0.5 2.5 0.2 Ⅳ 35.44 21.78 0.7 2.4 0.2 Ⅴ 33 21.87 0.85 0.9 0.2 Random parameters and their distribution.
Based on project geology exploration data, the statistical characteristics of material parameters are represented as Table 2.
Because of lacking of overbreak and underbreak statistical data, random factors considered in this paper are finite.
Online since: May 2010
Authors: T. Mohn, H. Blum, H. Kleemann, Dirk Biermann
Forming of high-tensile steel-sheets is one major technology to obtain weight
reduction in automotive applications.
The data was used to calculate the position of the dressing wheel in order to compensate for mounting errors by transforming the coordinate system into the position and rotation of the dressing spindle during the dressing process.
Therefore it was necessary to process the measured data in a special way.
The data from the optical 3D microscope had been analysed by use of the software tool "winSAM" that was developed at the Chair of Manufacturing Technology of the University of Erlangen.
The simulation of the grinding process will also be used to verify the process strategies and NC-data for shape grinding.
The data was used to calculate the position of the dressing wheel in order to compensate for mounting errors by transforming the coordinate system into the position and rotation of the dressing spindle during the dressing process.
Therefore it was necessary to process the measured data in a special way.
The data from the optical 3D microscope had been analysed by use of the software tool "winSAM" that was developed at the Chair of Manufacturing Technology of the University of Erlangen.
The simulation of the grinding process will also be used to verify the process strategies and NC-data for shape grinding.
Online since: August 2014
Authors: Zhang Zheng, Liang Li, Yin Fei Yang, Ning He, Wei Zhao
In our analyses, since material and physical data were not available for Al 7085 tempered aluminium forged blocks, data for Al 7075 were used instead.
After compression of 3 % (compression in the z direction, ratio=3%), around 65% stress reduction was achieved by reducing the residual stress values to around 115 MPa (reduction percentages were calculated by using the maximum residual stress values after quenching and compression).
(a) (b) (c) Fig. 6 Simulation and experimental data of specimen surface residual stress: (a) Measured in the x direction (b) Measured in the y direction (c) Measured in the diagonal direction. 3.4 Result of machining distortion It can be seen in Fig. 7 that the part is deformed significantly after machining.
[9] The Aluminium Association, Aluminium Standards and Data, March 1997
After compression of 3 % (compression in the z direction, ratio=3%), around 65% stress reduction was achieved by reducing the residual stress values to around 115 MPa (reduction percentages were calculated by using the maximum residual stress values after quenching and compression).
(a) (b) (c) Fig. 6 Simulation and experimental data of specimen surface residual stress: (a) Measured in the x direction (b) Measured in the y direction (c) Measured in the diagonal direction. 3.4 Result of machining distortion It can be seen in Fig. 7 that the part is deformed significantly after machining.
[9] The Aluminium Association, Aluminium Standards and Data, March 1997
Online since: January 2014
Authors: Valeria V. Strokova, Ekaterina V. Fomina, Mikhail Sergeevich Lebedev, Igor Vladimirovich Zhernovsky, Natalia Ivanovna Kozhukhova
Thus, studies aluminosilicate materials with IR-spectroscopy presented in this paper are consistent with previous data of chemical and mineral composition and confirm the marked differences.
In this regard, the purpose of these studies was to investigate the composition and the type and origin of bonds in the material by IR-spectroscopy and a comparison of data obtained by various methods of analysis, and establishing of correlation.
Whereas increasing aluminum content leads to reduction in the vibration frequencies of the bridge bonds [1].
Significantly lower content of alumina in the second group of materials is reflected in the reduction of the intensity of these bands (Fig. 3, 4).
Summary The results of studies on aluminosilicate materials with IR-spectroscopy are consistent with previously reported data of chemical and mineral composition [3] and confirm the marked differences.
In this regard, the purpose of these studies was to investigate the composition and the type and origin of bonds in the material by IR-spectroscopy and a comparison of data obtained by various methods of analysis, and establishing of correlation.
Whereas increasing aluminum content leads to reduction in the vibration frequencies of the bridge bonds [1].
Significantly lower content of alumina in the second group of materials is reflected in the reduction of the intensity of these bands (Fig. 3, 4).
Summary The results of studies on aluminosilicate materials with IR-spectroscopy are consistent with previously reported data of chemical and mineral composition [3] and confirm the marked differences.