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Online since: May 2016
Authors: Robert E. Stahlbush, M.J. Tadjer, G.E. Ruland, C.A. Affouda, Nadeemullah A. Mahadik, Eugene A. Imhoff
For the 1950 oC/10min anneal, a 3x reduction in BPD density was observed.
The third factor would be the annealing-induced reduction in the BPDs for this study.
For the samples annealed at 1950 oC, ~3X reduction was observed.
Using the derived BPD reducing fractions from our computation, the BPD density data for each of the two wafers was normalized, with the highest density for each wafer being 1.
We observed no significant reduction in BPDs for annealing at 1750 oC.
The third factor would be the annealing-induced reduction in the BPDs for this study.
For the samples annealed at 1950 oC, ~3X reduction was observed.
Using the derived BPD reducing fractions from our computation, the BPD density data for each of the two wafers was normalized, with the highest density for each wafer being 1.
We observed no significant reduction in BPDs for annealing at 1750 oC.
Online since: November 2012
Authors: Fairuz Izzuddin Romli, Mohd Syahidie Kamaruddin
As for the blended wing body, its projected emissions performance is based on published data in the literatures.
Of particular interest in this study is the expected 50% reduction of CO2 by year 2022 [9].
Fig. 3 Summarized Block Diagram of the Analysis Process Using linear regression based on data points in Fig. 1 and Fig. 2, empirical relationships that represent the estimated improvements achieved on TSFC and L/D throughout the years are derived for both regional-jet and large conventional aircraft categories.
In this study, recall that emissions standard of year 1997 is the basis for the reduction goals set by NASA.
This hints that the reliance on just improvements on engine technology and aerodynamic design of conventional aircraft concept might not be enough to successfully achieve the target fuel reduction, hence emissions reduction, goal.
Of particular interest in this study is the expected 50% reduction of CO2 by year 2022 [9].
Fig. 3 Summarized Block Diagram of the Analysis Process Using linear regression based on data points in Fig. 1 and Fig. 2, empirical relationships that represent the estimated improvements achieved on TSFC and L/D throughout the years are derived for both regional-jet and large conventional aircraft categories.
In this study, recall that emissions standard of year 1997 is the basis for the reduction goals set by NASA.
This hints that the reliance on just improvements on engine technology and aerodynamic design of conventional aircraft concept might not be enough to successfully achieve the target fuel reduction, hence emissions reduction, goal.
Online since: February 2008
Authors: Dong Bin Wei, A. Kiet Tieu, Hua Chun Pi, Jing Tao Han, Zheng Yi Jiang, Hei Jie Li
The total reduction is 3 mm, corresponding to true strain 1.39 and strain rate
0.001s-1.
When the reduction is small (ε=0.29), rolling texture has strong {100}<011> sheet texture and weak {111}<112> texture.
One thousand initial orientation data were obtained by EBSD and used in ABAQUS.
Fig. 7 gives the texture development of IF steel from Taylor-type and finite element models at various reductions with 48 slip systems.
When the reduction increases, the rolling textures tend to sharper.
When the reduction is small (ε=0.29), rolling texture has strong {100}<011> sheet texture and weak {111}<112> texture.
One thousand initial orientation data were obtained by EBSD and used in ABAQUS.
Fig. 7 gives the texture development of IF steel from Taylor-type and finite element models at various reductions with 48 slip systems.
When the reduction increases, the rolling textures tend to sharper.
Online since: May 2012
Authors: Shu Hao Huo, Xue Jing Zheng, Zhao Qin Ma
The side stream lime softening treatment system is energy saving and discharge reduction.
Water quality data of municipal reclaimed water, reservoir water and the mixed water are shown in Table 1.
The data indicate that Scheme I has the advantages of less investment, lower operation cost, minor land occupation, and minimum wastewater yield, so the side stream lime softening treatment system of recirculating cooling water is an optimal one.
The data indicate that the important index of COD, BOD, SS, NH4-N, Calcium Hardness, M Alkalinity and etc. are reduced significantly after treated by side stream lime softening treatment system.
In a word, the side stream lime softening treatment system is energy saving and discharge reduction.
Water quality data of municipal reclaimed water, reservoir water and the mixed water are shown in Table 1.
The data indicate that Scheme I has the advantages of less investment, lower operation cost, minor land occupation, and minimum wastewater yield, so the side stream lime softening treatment system of recirculating cooling water is an optimal one.
The data indicate that the important index of COD, BOD, SS, NH4-N, Calcium Hardness, M Alkalinity and etc. are reduced significantly after treated by side stream lime softening treatment system.
In a word, the side stream lime softening treatment system is energy saving and discharge reduction.
Online since: May 2012
Authors: Chao Yuan Cheng, Chun Yu Hsiao, Shu Wei Chung, Chun Pin Chiang, Zai Wei Chin
Arc-shaping of magnets for reduction of cogging torque inpermanent-magnet synchronous generators
Chao-Yuan Cheng1,a,Chun-Yu Hsiao2,b, Shu-Wei Chung1,c,
Chun-Pin Chiang1,d, Zai-Wei Chin1, e
1Department of Electrical Engineering, St.
Ansoft’s Maxwell and RMxprt were employed for data analysis.
When the thickness of the magnets exceeds a given limited, variations in cogging torque reach saturation levels at which point further reduction does not lead to observable improvements.
Thus, a reduction in cogging torque leads to a reduction in motor efficiency.
Shen, “Cogging torque reduction in permanent magnet flux-switching machines by rotor teeth axial pairing,” IET Electric Power Applications, vol. 4, pp. 500-506, 2010
Ansoft’s Maxwell and RMxprt were employed for data analysis.
When the thickness of the magnets exceeds a given limited, variations in cogging torque reach saturation levels at which point further reduction does not lead to observable improvements.
Thus, a reduction in cogging torque leads to a reduction in motor efficiency.
Shen, “Cogging torque reduction in permanent magnet flux-switching machines by rotor teeth axial pairing,” IET Electric Power Applications, vol. 4, pp. 500-506, 2010
Online since: July 2017
Authors: Flavia de Paula Vitoretti, Maria Carolina dos Santos Freitas, Jose Adilson de Castro, Fabiane Roberta Freitas da Silva, Camila Martins Hosken
Within this context, evaluate the reduction of iron ore pellets using the dilatometer technique constitutes a promising approach for optimizing this process.
The results indicate the sintering progress of the particles that comprise the pellets as well as reduction the porosity.
Densification of powder compacts during sintering under constant heating rate has been studied and methods of analysing the densification kinetic data have been suggested [2].
Data obtained in the shrinkage or swelling of a pellet from dilatometer can be usually generalized as behavior macroscopic of a porous body.
Model Kinetic The kinetic data dilatometer analysis were used to evaluate the kinetics of densification of iron ore pellet.
The results indicate the sintering progress of the particles that comprise the pellets as well as reduction the porosity.
Densification of powder compacts during sintering under constant heating rate has been studied and methods of analysing the densification kinetic data have been suggested [2].
Data obtained in the shrinkage or swelling of a pellet from dilatometer can be usually generalized as behavior macroscopic of a porous body.
Model Kinetic The kinetic data dilatometer analysis were used to evaluate the kinetics of densification of iron ore pellet.
Online since: September 2019
Authors: Khanh Duong Quang, Huong Vuong Thi, Anh Luu Van
For the -th peak of the damped amplitude the formula for damping ratio is given by:
(10)
The analytically preliminary equations 7, 8, 9, 10 are used later to identify the damping ratio and the damped period with the data obtained from the measurements.
2.2.
The measured data are processed by the ACCOM evaluation software with the accuracy of 2.
The data were measured at the sampling period of .
The output data was saved by selecting the sampling rate of 400Hz and the linear acceleration full scale of.
Fig. 5 Measured accelerations for the axis drive Fig. 6 Measured accelerations for the axis drive The raw data are transferred from the device to the host through the Virtual COM port.
The measured data are processed by the ACCOM evaluation software with the accuracy of 2.
The data were measured at the sampling period of .
The output data was saved by selecting the sampling rate of 400Hz and the linear acceleration full scale of.
Fig. 5 Measured accelerations for the axis drive Fig. 6 Measured accelerations for the axis drive The raw data are transferred from the device to the host through the Virtual COM port.
Online since: October 2013
Authors: Xue Qing Zhang, Hong Yu Chen
These functions include flood control, ice jam prevention, sediment reduction, water supply and power generation.
All figures applied in these researches are static data on the annual base and constant solar transformities are applied following a traditional approach.
Dynamic Emergy Analysis Dynamic emergy analysis is based on the traditional emergy evaluation that assumes a system stays static and uses steady transformities, while applying rate equations to accumulate raw energy data and transformities through the changes of temporary inputs and outputs [1, 9, 10].
According to the changing inflow and reservoir regulation, annual operation of Xiaolangdi reservoir can be separated into several stages as shown in Fig. 2, matching with different priority functions (flood control, ice jam prevention and sediment reduction).
A dynamic emergy analysis approach is taken to evaluate the efficiency of these functions, which include flood control, ice jam prevention, sediment reduction, water supply and power generation.
All figures applied in these researches are static data on the annual base and constant solar transformities are applied following a traditional approach.
Dynamic Emergy Analysis Dynamic emergy analysis is based on the traditional emergy evaluation that assumes a system stays static and uses steady transformities, while applying rate equations to accumulate raw energy data and transformities through the changes of temporary inputs and outputs [1, 9, 10].
According to the changing inflow and reservoir regulation, annual operation of Xiaolangdi reservoir can be separated into several stages as shown in Fig. 2, matching with different priority functions (flood control, ice jam prevention and sediment reduction).
A dynamic emergy analysis approach is taken to evaluate the efficiency of these functions, which include flood control, ice jam prevention, sediment reduction, water supply and power generation.
Online since: August 2014
Authors: Li Ming Ren, Jing Xue An, Lei Wang, Chun Yu Wang
Research and Governance on Catalyst Abrasion for Selective Catalytic Reduction (SCR) System in Power Plant Boiler
Ren Liming1, a, Wang Lei1, Wang Chunyu1 , An Jingxue1
1 Henan Electric Power Research Institute, Zhengzhou, China, 450052
aWlei1979130@sina.com
Keywords: Power plant; boiler; SCR; abrasion.
Abstract: This paper presents a research on the problem of catalyst failure in a selective catalytic reduction (SCR) system.
In view of the increasingly strict environmental standards, the boiler is equipped with a selective catalytic reduction (SCR) system, manufactured by Shanghai electric Ishikawa island power station environmental protection engineering co., LTD, to reduce the amount of emissions of NOx.
Data Comparison Comparison on the distribution uniformity Now choose the index of relative root mean square value, to comparing the uniformity of the velocity and the fly ash concentration in horizontal flue on the retrofit of guide device.
Lower is the index, lower the deviation among the data of test points.
Abstract: This paper presents a research on the problem of catalyst failure in a selective catalytic reduction (SCR) system.
In view of the increasingly strict environmental standards, the boiler is equipped with a selective catalytic reduction (SCR) system, manufactured by Shanghai electric Ishikawa island power station environmental protection engineering co., LTD, to reduce the amount of emissions of NOx.
Data Comparison Comparison on the distribution uniformity Now choose the index of relative root mean square value, to comparing the uniformity of the velocity and the fly ash concentration in horizontal flue on the retrofit of guide device.
Lower is the index, lower the deviation among the data of test points.
Online since: October 2014
Authors: Jing Bo Yang, Xu Gang Hua, Zheng Qing Chen
Focusing on a quadruple-circuit on the same steel tube tower, a vibration reduction test on a real-scale tower conducted.
A vibration reduction test is conducted on real-scale tower in the Pole and Tower Testing Base, and the test result shows good damping effect of the TMD.
Double cantilevers pendulous eddy current TMD on debugging frame Vibration Reduction Test and Damping Effect on a Real-scale Tower The vibration signal test system is connected to the data acquisition instrument through 3 acceleration sensors installed in the middle of the tower tip and the cross arm.
During the test, wind speed data for 3 times period are obtained and wind speed curves are plotted based on the data to provide reference for the input of random wind vibration in the corresponding period.
Typical Actual Measured Time-history Wind For environmental vibration and free attenuation response signals after unloading, a variety of data processing methods are used to identify the modal damping of transmission tower before and after the installation of the damping devices.
A vibration reduction test is conducted on real-scale tower in the Pole and Tower Testing Base, and the test result shows good damping effect of the TMD.
Double cantilevers pendulous eddy current TMD on debugging frame Vibration Reduction Test and Damping Effect on a Real-scale Tower The vibration signal test system is connected to the data acquisition instrument through 3 acceleration sensors installed in the middle of the tower tip and the cross arm.
During the test, wind speed data for 3 times period are obtained and wind speed curves are plotted based on the data to provide reference for the input of random wind vibration in the corresponding period.
Typical Actual Measured Time-history Wind For environmental vibration and free attenuation response signals after unloading, a variety of data processing methods are used to identify the modal damping of transmission tower before and after the installation of the damping devices.