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Studies on the Adhesion of Oxide Layer Formed on Steel Long-Term Operated at an Elevated Temperature
Online since: January 2015
Authors: Monika Gwoździk
Excessive growth of oxide layer from the steam side (internal wall of pipe) has negative consequences during long term operation, because the oxide layer causes reduction of wall thickness and increase of stresses [4-7].
Graph of data obtained from the scratch test for a preset force of 1÷200 N, the inner surface of the tube wall.
Graph of data obtained from the scratch test for a preset force of 1÷200 N, the outside surface of the tube wall.
Graph of data obtained from the scratch test for a preset force of 1÷200 N, the inner surface of the tube wall.
Graph of data obtained from the scratch test for a preset force of 1÷200 N, the outside surface of the tube wall.
Online since: December 2010
Authors: Kenta Kawarai, Tamihiro Gotoh
Introduction
Phase-change recordings are frequently used in optical data storage media such as rewritable CDs and DVDs.
Diffraction data in the angle range between 20° and 40° were obtained for structural analyses.
We summarize that crystallization kinetics is quite sensitive to thermal treatment, and the control of structural order in Ge2Sb2Te5 is important for reduction of crystallization time in phase-change recordings.
Diffraction data in the angle range between 20° and 40° were obtained for structural analyses.
We summarize that crystallization kinetics is quite sensitive to thermal treatment, and the control of structural order in Ge2Sb2Te5 is important for reduction of crystallization time in phase-change recordings.
Online since: October 2007
Authors: Young Won Chang, J.E. Park, Y.J. Yang
Introduction
Magnesium alloys have recently generated a great interest in automotive and aerospace industry as
light weight structural materials due to the demand for weight reduction.
The relaxation data were then consequently analyzed utilizing the internal variable theory for inelastic deformation [1].
(a) (b) Table 2 Constitutive parameters determined from the load relaxation test results. 200 °C σ* (MPa) Log α* (/s) p R.T. σ* (MPa) Log α* (/s) p 0 ° 130 -4.82 0 ° 214 -9.54 45 ° 129 -4.81 45 ° 205 -9.80 90 ° 129 -4.82 0.3 90 ° 203 -9.88 0.3 The flow stress and the total inelastic strain rate were calculated from the load-time data following the usual procedure described by Lee and Hart [6].
The relaxation data were then consequently analyzed utilizing the internal variable theory for inelastic deformation [1].
(a) (b) Table 2 Constitutive parameters determined from the load relaxation test results. 200 °C σ* (MPa) Log α* (/s) p R.T. σ* (MPa) Log α* (/s) p 0 ° 130 -4.82 0 ° 214 -9.54 45 ° 129 -4.81 45 ° 205 -9.80 90 ° 129 -4.82 0.3 90 ° 203 -9.88 0.3 The flow stress and the total inelastic strain rate were calculated from the load-time data following the usual procedure described by Lee and Hart [6].
Online since: May 2006
Authors: Francisco Guitián, Pilar Rey, Jaime Franco, Alejandro Souto
These diagrams were constructed for an
absolute pressure of 10-4 atm using thermochemical data obtained with Factsage 5.3
Thermochemical Software and Compound and Solution Databases.
The initial specific surface area of all three kinds of pellet was < 0.01 m2/g, as determined by applying the BET formula to N2 adsorption data obtained with a Micromeritics ASAP 2000.
Conclusion Selective reduction and volatilization of the silica of mullite, zircon and cordierite in low-PO2 environments at high temperatures produces corundum-surfaced mullite and cordierite and monoclinic zirconia-surfaced zircon.
The initial specific surface area of all three kinds of pellet was < 0.01 m2/g, as determined by applying the BET formula to N2 adsorption data obtained with a Micromeritics ASAP 2000.
Conclusion Selective reduction and volatilization of the silica of mullite, zircon and cordierite in low-PO2 environments at high temperatures produces corundum-surfaced mullite and cordierite and monoclinic zirconia-surfaced zircon.
Online since: July 2012
Authors: Yu Qiu Song, Jun Ling Wang, Xin Xin Zhu, Zu Li Zhang
The modal can be obtained by the following ways: Block Lanczos, subspace; Power Dynamics; reduction method; unsymmetrical modal algorithm method; damping law.
He calculated data showed that the natural frequency is higher and the amplitude is smaller of 2 to 4-order, it is not easy to resonate with external vibration and it has little effect on the life and quality of the headstock; . the natural frequency is lower and the amplitude is greater of 5 to 9-order, it is easy to resonate with external vibration and it has great effect on the life and quality of the headstock., so in actual design, attention should be paid to avoid external vibration of similar frequency with the headstock.
Conclusion 1) By comparing calculated data in Figure 2,3 and 4 and the modal analysis results in Figure 5,6 and 7, it can be concluded that the dynamic rigidity of Design III is greater than that of Designs I and II. 2) As the implements are mounted on tractor, most of the external excitation frequency was generated by the tractor's engine.
He calculated data showed that the natural frequency is higher and the amplitude is smaller of 2 to 4-order, it is not easy to resonate with external vibration and it has little effect on the life and quality of the headstock; . the natural frequency is lower and the amplitude is greater of 5 to 9-order, it is easy to resonate with external vibration and it has great effect on the life and quality of the headstock., so in actual design, attention should be paid to avoid external vibration of similar frequency with the headstock.
Conclusion 1) By comparing calculated data in Figure 2,3 and 4 and the modal analysis results in Figure 5,6 and 7, it can be concluded that the dynamic rigidity of Design III is greater than that of Designs I and II. 2) As the implements are mounted on tractor, most of the external excitation frequency was generated by the tractor's engine.
Online since: September 2013
Authors: Xiao Guo Chen, Yue Yang
This paper improves the the commonly used model of joints in the used model and than derives the displacement formulas of the improved used model; Conditioned by survey and design data of the section between Harbin Engineering University Station and Taiping Bridge Station of Harbin Metro Line 1, comparative analysis is made by used model and improved model aimed at researching deformation of soil.
This paper thinks of stiffness reduction(the value is set as ).
Conditioned by data of geology and segments of the section between Harbin Engineering University Station and Taiping Bridge Station of Harbin Metro Line 1, these formulas are used to the actual displacement of some segment sections.
This paper thinks of stiffness reduction(the value is set as ).
Conditioned by data of geology and segments of the section between Harbin Engineering University Station and Taiping Bridge Station of Harbin Metro Line 1, these formulas are used to the actual displacement of some segment sections.
Online since: July 2014
Authors: Hai Bo Liu, Wen Yan Liu, Zhong Fu Tan, Xiao Bao Yu, Pu Yu He, Hai Tao YUE
A provincial power grid company provides the data for empirical analysis to explore the applicability of the model.
Among them, there are eight indicators in the core resources system, such as: total assets (S1), total liabilities (S2), Line length per capita (S3), Total staff (S4), net value of fixed assets (S5), Total income (S6), The proportion of skilled talents(S7), Net income Per capita (S8); Customers market system contains eight indicators: Tariff recovery rate(S9), market share(S10), The average difference between purchase and sale price(S11), Electricity sales(S12), Customer satisfaction rate(S13),Power supply population(S14), emission reduction through generating rights trading(S15), Province purchase (sale) electricity contract execution equalization rate(S16); Internal operation system contains eight indicators: Power supply reliability rate(S17), Comprehensive line loss rate(S18), Voltage qualification rate(S19), Loading rate(S20), Inventory Turnover (S21), Power system failure outage rate (S22), Inventory idle rate (S23), New energy and power generation capacity (S24); Asset-liability
Among them, there are eight indicators in the core resources system, such as: total assets (S1), total liabilities (S2), Line length per capita (S3), Total staff (S4), net value of fixed assets (S5), Total income (S6), The proportion of skilled talents(S7), Net income Per capita (S8); Customers market system contains eight indicators: Tariff recovery rate(S9), market share(S10), The average difference between purchase and sale price(S11), Electricity sales(S12), Customer satisfaction rate(S13),Power supply population(S14), emission reduction through generating rights trading(S15), Province purchase (sale) electricity contract execution equalization rate(S16); Internal operation system contains eight indicators: Power supply reliability rate(S17), Comprehensive line loss rate(S18), Voltage qualification rate(S19), Loading rate(S20), Inventory Turnover (S21), Power system failure outage rate (S22), Inventory idle rate (S23), New energy and power generation capacity (S24); Asset-liability
Online since: December 2013
Authors: Ilya V. Semenkov, Nikita V. Martyushev
There are not enough data on the impact of operating modes of the activation unit on the parameters of mixed powders in contemporary scientific literature[7, 8].
Thus, the mixture of copper and alumina powders in the ball mill causes the significant reduction of the size of copper powder particles.
Thus, the mixture of copper and alumina powders in the ball mill causes the significant reduction of the size of copper powder particles.
Online since: November 2023
Authors: Peter Mayr, Natan Nudelis
Furthermore, X-ray data allows an accurate categorisation of pores and provides a large amount of labelled data for supervised learning applications.
The networks are trained on the training data set (70 %) until the performance on the validation data set (15 %) starts to decrease, indicating that the generalisation ability of the network has reached its peak.
The data are randomised before being split into training, validation and test data sets.
Due to the lack of data variation, an additional generalisation check on new data (5 unknown parameter variations) is performed as well (Table 1).
Mayr, Defect-based analysis of the laser powder bed fusion process using X-ray data.
The networks are trained on the training data set (70 %) until the performance on the validation data set (15 %) starts to decrease, indicating that the generalisation ability of the network has reached its peak.
The data are randomised before being split into training, validation and test data sets.
Due to the lack of data variation, an additional generalisation check on new data (5 unknown parameter variations) is performed as well (Table 1).
Mayr, Defect-based analysis of the laser powder bed fusion process using X-ray data.
Online since: November 2010
Authors: Xiao Yun Chen, Guo Hua Liu, Yu Kai Yao, You Li Su, Long Jie Li
Upon finishing the data exchange, it is not necessary to maintain routing information.
It will be send data to destination node relying on routing in the cache.
Once the source node receives the RREP, it may begin to forward data packets to the destination.
In this case it can send the data to destination node with less transmission delay.
The data packet can go through the shortest link, so the transmission delays decrease greatly.
It will be send data to destination node relying on routing in the cache.
Once the source node receives the RREP, it may begin to forward data packets to the destination.
In this case it can send the data to destination node with less transmission delay.
The data packet can go through the shortest link, so the transmission delays decrease greatly.