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Online since: February 2014
Authors: Tatsuo Fujimoto, Hiroshi Tsuge, Masashi Nakabayashi, Kiyoshi Kojima, Kozo Abe, Kohta Shimomura
Normal elastic moduli for the major crystal axis directions were measured by the acoustic wave velocity method, and the residual normal stresses were then finally calculated from these data.
Results and discussions Fig.2 An example of {00012} diffraction data measured in this work.
Fig.2 shows an example of {00012} diffraction data, the maximum measured FWHM of 16.2 arcsec confirms its high crystal quality.
The lattice constants calculated from the diffraction data are shown in Table 1.
Fig. 4 shows the circumferential stress calculated from the data in table 3.
Results and discussions Fig.2 An example of {00012} diffraction data measured in this work.
Fig.2 shows an example of {00012} diffraction data, the maximum measured FWHM of 16.2 arcsec confirms its high crystal quality.
The lattice constants calculated from the diffraction data are shown in Table 1.
Fig. 4 shows the circumferential stress calculated from the data in table 3.
Structure and Mechanical Properties of Electrical Copper Wire Processed by Coarse and Medium Drawing
Online since: February 2019
Authors: Anatoliy G. Illarionov, Stepan I. Stepanov, Yu.N. Loginov
Coefficient for evaluation the ultimate tensile strength from the micro-indentation data was determined.
The formula was proposed for estimation the dislocation density the stress strain curves and from the data on the grain size in the transverse section of the wire.
The data on the mechanical properties for the wire of various diameters are summarized in Table 1.
Based on the literature data [16] we estimated the grain-boundary strengthening by the Hall-Petch equation (2): σgb = σo+ Kdd, MPa
The method of estimating the density of dislocations using the data from stress-strain diagrams and the grain size value of the electrical copper wire in the transverse section was proposed, which allowed for calculating the data comparable with previous studies.
The formula was proposed for estimation the dislocation density the stress strain curves and from the data on the grain size in the transverse section of the wire.
The data on the mechanical properties for the wire of various diameters are summarized in Table 1.
Based on the literature data [16] we estimated the grain-boundary strengthening by the Hall-Petch equation (2): σgb = σo+ Kdd, MPa
The method of estimating the density of dislocations using the data from stress-strain diagrams and the grain size value of the electrical copper wire in the transverse section was proposed, which allowed for calculating the data comparable with previous studies.
Online since: September 2012
Authors: Juan He, Xin Ma
Samples Data Selection and Description of Statistical Characteristics
This paper chooses hot-rolled coil iron, which is in high demand in Real Estate industry of China, as sample and uses the data of price of hot-rolled coil iron from January of 2007 to December of 2009 to determine parameter.
With the large amount of data, SPSS software will be employed.
Therefore, multiple regressions is applicable for the data forecast in this paper.
The regression equation is obtained after reduction of unqualified variables
[3]Yu Jianying,He xuhong:Data Statitstics analysis and application of SPSS.Beijing: The People's Posts and Telecommunications Press2003(4).
With the large amount of data, SPSS software will be employed.
Therefore, multiple regressions is applicable for the data forecast in this paper.
The regression equation is obtained after reduction of unqualified variables
[3]Yu Jianying,He xuhong:Data Statitstics analysis and application of SPSS.Beijing: The People's Posts and Telecommunications Press2003(4).
Online since: June 2021
Authors: De Gui Liu, Hai Bao Wu, Jian Fei Wang, Fu Long Chen, Ji Zhen Li
The research results showed that the reduction amount of the material made the material thinning rate approach the limit thinning rate.
Furthermore a test piece for ultra-high-strength steel spinning technology has been developed, and the solutions discussed for flanging defects in the actual spinning process, and test data for the actual production of ultra-high-strength steel spinning parts accumulated.
The actual wall thickness is often smaller than the pass reduction due to material spring back and equipment concession.
In order to control the wall thickness of the final part, the pass reduction should be adjusted according to the material stress state.
Serial number Pass reduction(mm) Actual wall thickness reduction(mm) Radial spinning force(Ton) 1 1.0 0.85 6.5 2 2.0 1.62 14 3 3.0 2.43 21 4 4.0 3.37 29 5 5.0 4.21 36 When the pass reduction was set to 5.0 mm, the spinning process was prone to overload causing the equipment to stop running.
Furthermore a test piece for ultra-high-strength steel spinning technology has been developed, and the solutions discussed for flanging defects in the actual spinning process, and test data for the actual production of ultra-high-strength steel spinning parts accumulated.
The actual wall thickness is often smaller than the pass reduction due to material spring back and equipment concession.
In order to control the wall thickness of the final part, the pass reduction should be adjusted according to the material stress state.
Serial number Pass reduction(mm) Actual wall thickness reduction(mm) Radial spinning force(Ton) 1 1.0 0.85 6.5 2 2.0 1.62 14 3 3.0 2.43 21 4 4.0 3.37 29 5 5.0 4.21 36 When the pass reduction was set to 5.0 mm, the spinning process was prone to overload causing the equipment to stop running.
Online since: September 2013
Authors: Rong Hua Zhong, Xiu Bin He, Kai Dao Fu
Based on the precipitation and water discharge series data (1959–2008), and sediment load series data (1993–2008), the runoff and sediment discharge variation and its response to precipitation has been analyzed.
Fig.1 A sketch map of river network in the studied area and the Manan Gauging Station (MGS) Data and methods Datasets.In this study, the monthly water discharge data and monthly sediment load data observed at MGS were used to analysis change trends.
All hydrological data were provided by the Yunnan Hydrology and Water Resources Bureau.
The quality of the hydrological data was firmly controlled before its release.
The sediment load data used in this paper refer to suspended sediment.
Fig.1 A sketch map of river network in the studied area and the Manan Gauging Station (MGS) Data and methods Datasets.In this study, the monthly water discharge data and monthly sediment load data observed at MGS were used to analysis change trends.
All hydrological data were provided by the Yunnan Hydrology and Water Resources Bureau.
The quality of the hydrological data was firmly controlled before its release.
The sediment load data used in this paper refer to suspended sediment.
Online since: July 2017
Authors: Leonardo Martins da Silval, J.A. Castro, M. Nascimento, I.O. Mota, E.M. Oliveira
Pedro Calmon, 900, Cidade Universitária, RJ, Brazil
leonardouffsilva@gmail.com
Keywords: reduction of phosphorus; iron ore; leaching; microwave.
It was observed in the treated sample the occurrence of increased passing percentage in mesh 0.297 mm and 0.210 mm followed by the passing of mass reduction in the qualifying mesh 0,105 mm.
In the iron ore sample with an average particle size of 0.595 mm treated with microwave power, we observed an increase of 6% in the percentage of passing the 0.297 mm mesh followed by 1% reduction in mass of the through- classifying the particles into the mesh of 0.210 mm and a 3% reduction in the through mass fraction of 0.105 mm thereby showing a reduction in the influence of the pretreatment of the particles as a function of the distance between the original particle size and particle size classification mesh.
Ou: Intensifying Gaseous Reduction of High Phosphorus Iron Ore Fines by Microwave Pretreatment State.
Haque Unpublished data.
It was observed in the treated sample the occurrence of increased passing percentage in mesh 0.297 mm and 0.210 mm followed by the passing of mass reduction in the qualifying mesh 0,105 mm.
In the iron ore sample with an average particle size of 0.595 mm treated with microwave power, we observed an increase of 6% in the percentage of passing the 0.297 mm mesh followed by 1% reduction in mass of the through- classifying the particles into the mesh of 0.210 mm and a 3% reduction in the through mass fraction of 0.105 mm thereby showing a reduction in the influence of the pretreatment of the particles as a function of the distance between the original particle size and particle size classification mesh.
Ou: Intensifying Gaseous Reduction of High Phosphorus Iron Ore Fines by Microwave Pretreatment State.
Haque Unpublished data.
Online since: December 2013
Authors: Xin Sun, Chu Wu, Tong Wei Yu
In addition, the uncertainties produced r data acquisition make a lot of troubles in distribution system reconfiguration.
The uncertainty factors in a power system itself contain measurement error, data corruption in transmission and imperfection of algorithm.
In this paper, agent theory is used to monitor the states of devices and other power quality, completing computational tasks among available resources, information transfer of data and decision command, and performing negotiations related to power demand and supply exchanges.
The decision system receives the new reduction consequence.
The reduction part can update self-healing control rule base.
The uncertainty factors in a power system itself contain measurement error, data corruption in transmission and imperfection of algorithm.
In this paper, agent theory is used to monitor the states of devices and other power quality, completing computational tasks among available resources, information transfer of data and decision command, and performing negotiations related to power demand and supply exchanges.
The decision system receives the new reduction consequence.
The reduction part can update self-healing control rule base.
Online since: December 2014
Authors: Liang Wang, Yi Lin Wang, Yi Sheng Zhang, Zi Jian Wang, Ming Lin Zhou
Numerical simulation method combining the experimental data is also used to predict mechanical performance of the new connection fitting, which provides guidance for the manufacturing process.
Based on the typical electrical connection fitting-Clevis, a new method for reduction of weight in electrical power fittings has been proposed under the premise of ensuring strength.
Mechanical calculation has been conducted subsequently based on the experimental data obtained.
Conclusions & future work A new method for weight reduction in transmission line fittings has been proposed, which expands the application fields of ultra-high strength steel.
Under the premise of ensuring strength, new design Clevis-Clevis has a weight reduction of at least 60% than the traditional one.
Based on the typical electrical connection fitting-Clevis, a new method for reduction of weight in electrical power fittings has been proposed under the premise of ensuring strength.
Mechanical calculation has been conducted subsequently based on the experimental data obtained.
Conclusions & future work A new method for weight reduction in transmission line fittings has been proposed, which expands the application fields of ultra-high strength steel.
Under the premise of ensuring strength, new design Clevis-Clevis has a weight reduction of at least 60% than the traditional one.
Online since: March 2014
Authors: R.K. Singh Raman, Daniel Borrie, Xiao Ling Zhao, Yu Bai, Hong Bo Liu
The comparisons between the current and previous results have provided data on the durability of CFRP/steel joints under this environmental condition.
For this purpose, the ratios of strengths at 40 oC or 50 oC with that at 20 oC (i.e., Fave/F20, ave data) are also presented in Table 1.
The data clearly indicate that the joint strength decreases with increasing temperature.
To assess the effect of environmental exposure and cyclic loading on the bond strength, the ultimate load (Fult) was compared with the average static strength at 20 oC (F20, ave), and the comparative data are represented as SR in Table 2.
Data in Table 1 suggest a greater reduction in bond strength than those in Table 2.
For this purpose, the ratios of strengths at 40 oC or 50 oC with that at 20 oC (i.e., Fave/F20, ave data) are also presented in Table 1.
The data clearly indicate that the joint strength decreases with increasing temperature.
To assess the effect of environmental exposure and cyclic loading on the bond strength, the ultimate load (Fult) was compared with the average static strength at 20 oC (F20, ave), and the comparative data are represented as SR in Table 2.
Data in Table 1 suggest a greater reduction in bond strength than those in Table 2.
Online since: August 2024
Authors: Francesco La Via, Viviana Scuderi, Annamaria Muoio, Matteo Ferri, Sergio Sapienza, Luca Belsito, Alberto Roncaglia
Furthermore, from the simulations the importance of the reduction of the under etching of the anchor points of the resonators has also been observed.
In fact the reduction of this under etch produces a decrease of the stress in the double clamped beams, a small reduction of the resonance frequency, and a large reduction of the Q-factor and then of the oscillation frequency stability of the resonators in closed-loop operation.
From these data it is also possible to observe that the different configuration between the different anchor points in the left region and in the right region of the beams produce different values of stress.
Increasing the under etching from 0 to 25 μm we observe a reduction of 8% of the resonance frequency and of 52% of the Q-factor.
In fact the reduction of this under etch produces a decrease of the stress in the double clamped beams, a small reduction of the resonance frequency, and a large reduction of the Q-factor and then of the oscillation frequency stability of the resonators in closed-loop operation.
From these data it is also possible to observe that the different configuration between the different anchor points in the left region and in the right region of the beams produce different values of stress.
Increasing the under etching from 0 to 25 μm we observe a reduction of 8% of the resonance frequency and of 52% of the Q-factor.