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Online since: March 2011
Authors: Takeshi Ohshima, Shinobu Onoda, Hideharu Matsuura, Hideki Yanagisawa, Kozo Nishino, Takunori Nojiri
Reduction in Majority-Carrier Concentration in Lightly-Doped 4H-SiC Epilayers by Electron Irradiation
Hideharu Matsuura1,a, Hideki Yanagisawa1, Kozo Nishino1, Takunori Nojiri1, Shinobu Onoda2,b, and Takeshi Ohshima2,c
1Osaka Electro-Communication University, 18-8 Hatsu-cho, Neyagawa, Osaka 572-8530, Japan
2Japan Atomic Energy Agency, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan
a matsuura@isc.osakac.ac.jp, bonoda.shinobu@jaea.go.jp, cohshima.takeshi20@jaea.go.jp
Keywords: Electron irradiation, Al-doped 4H-SiC, N-doped 4H-SiC, Reduction of acceptor densities, Reduction of donor densities, Radiation damage.
The mechanisms for the reduction in the hole concentration in lightly Al-doped p-type 4H-SiC epilayers by electron irradiation as well as in the electron concentration in lightly N-doped n-type 4H-SiC epilayers by electron irradiation are investigated.
Introduction By comparing electron-radiation damage in p-type 4H-SiC with that in p-type Si [1,2], it was found that the reduction in the temperature-dependent hole concentration, , in Al-doped p-type 4H-SiC by electron irradiation was much larger than in Al-doped p-type Si.
By fitting the curve to the experimental data, and were determined to be and [2].
By fitting the curve to the experimental data, the values of and were determined to be and , respectively.
The mechanisms for the reduction in the hole concentration in lightly Al-doped p-type 4H-SiC epilayers by electron irradiation as well as in the electron concentration in lightly N-doped n-type 4H-SiC epilayers by electron irradiation are investigated.
Introduction By comparing electron-radiation damage in p-type 4H-SiC with that in p-type Si [1,2], it was found that the reduction in the temperature-dependent hole concentration, , in Al-doped p-type 4H-SiC by electron irradiation was much larger than in Al-doped p-type Si.
By fitting the curve to the experimental data, and were determined to be and [2].
By fitting the curve to the experimental data, the values of and were determined to be and , respectively.
Online since: January 2014
Authors: Xian Feng Huang, Quan Shi, Chen Hui Zhu
According to Gomperts model for rectangular aperture, the sound reduction index of a wall with slits can be predicted.
CUI Cheng-xun[7] studied on the sound reduction index of doors with aperture at bottom by comparing measured data and prediction extensively.
The total sound reduction index of the partition with silts can be calculated from the area-weighted sound reduction index as shown in equation (1).
From these Figs, It is indicated that the most significative decrease on sound reduction index curve is found for the slit occurrence, the increases of the width and length of the slits produce an additional but limited decrease sound reduction index below the frequency of 800Hz.
Above this frequency, the additional sound reduction index drop down rapidly, and the curves of sound reduction index exhibit the dips whose frequencies are about 2000 Hz.
CUI Cheng-xun[7] studied on the sound reduction index of doors with aperture at bottom by comparing measured data and prediction extensively.
The total sound reduction index of the partition with silts can be calculated from the area-weighted sound reduction index as shown in equation (1).
From these Figs, It is indicated that the most significative decrease on sound reduction index curve is found for the slit occurrence, the increases of the width and length of the slits produce an additional but limited decrease sound reduction index below the frequency of 800Hz.
Above this frequency, the additional sound reduction index drop down rapidly, and the curves of sound reduction index exhibit the dips whose frequencies are about 2000 Hz.
Online since: September 2016
Authors: A.E. Huespe, M. Caicedo, J. Oliver, O. Lloberas-Valls
Model Order Reduction in Computational Multiscale Fracture Mechanics
M.
amcaicedo@cimne.upc.edu, boliver@cimne.upc.edu, cahuespe@intec.unl.edu.ar, dolloberas@cimne.upc.edu Keywords: Model Order Reduction, Reduced-Order Cubature, Fracture, Computational Multi-scale modeling, Continuum Strong Discontinuituy Approach.
This technique uses a directional derivative of a scalar field, based on a location variable (in our case, the average of mesoscale dissipated energy) whose zero level set defines the crack path. 2.2 Model Order Reduction techniques The reduction process is divided into two sequential stages.
These data, together with the material and geometrical parameters, define the set of input parameters for the first and second stage (online part).
High-performance model reduction techniques in computational multiscale homogenization.
amcaicedo@cimne.upc.edu, boliver@cimne.upc.edu, cahuespe@intec.unl.edu.ar, dolloberas@cimne.upc.edu Keywords: Model Order Reduction, Reduced-Order Cubature, Fracture, Computational Multi-scale modeling, Continuum Strong Discontinuituy Approach.
This technique uses a directional derivative of a scalar field, based on a location variable (in our case, the average of mesoscale dissipated energy) whose zero level set defines the crack path. 2.2 Model Order Reduction techniques The reduction process is divided into two sequential stages.
These data, together with the material and geometrical parameters, define the set of input parameters for the first and second stage (online part).
High-performance model reduction techniques in computational multiscale homogenization.
Online since: August 2014
Authors: Chun Lang Yeh
SOx Reduction by Feedwater in an Industrial Boiler
Chun-Lang Yeh
Department of Aeronautical Engineering, National Formosa University, Huwei, Yunlin 632, Taiwan
clyeh@nfu.edu.tw
Keywords: Pollution; SOx Reduction; CO Boiler; Feedwater.
This paper discusses the SOx reduction by feedwater in an industrial boiler.
The influence of feedwater flow rate on SOx reduction is inspected.
Conclusion In this study, SOx reduction by feedwater in a CO boiler is investigated numerically.
The author would also like to express appreciation for the valuable data and constructive suggestions from Formosa Petrochemical Corporation in Taiwan.
This paper discusses the SOx reduction by feedwater in an industrial boiler.
The influence of feedwater flow rate on SOx reduction is inspected.
Conclusion In this study, SOx reduction by feedwater in a CO boiler is investigated numerically.
The author would also like to express appreciation for the valuable data and constructive suggestions from Formosa Petrochemical Corporation in Taiwan.
Online since: July 2006
Authors: Masafumi Harada, Yoshifumi Kimura
Introduction
Ultrafine particles of many metals have been prepared by various methods, such as photochemical
reduction, chemical reduction, chemical liquid deposition, and thermal decomposition.
The scattering data were collected by a position sensitive proportional counter (PSPC).
These data were obtained from the measurement during the stirring of the emulsions, resulting in getting a worse S/N spectrum.
It is expected that the data quality as for S/N will become better without stirring these emulsions.
Reduction with NaBH4 and detailed analysis are in progress.
The scattering data were collected by a position sensitive proportional counter (PSPC).
These data were obtained from the measurement during the stirring of the emulsions, resulting in getting a worse S/N spectrum.
It is expected that the data quality as for S/N will become better without stirring these emulsions.
Reduction with NaBH4 and detailed analysis are in progress.
Online since: June 2010
Authors: Si Qun Ma, Wan Li Zhao, Ya Na Li, Xue Fei Huang, Xiao Peng Wu, Xuan Chen, Lin Feng Li, Qing Hu Kang
The makeup of units of simulation platform
The final aim of simulation platform is realizing sharing analysis data among of different CAE
software's previous and post processor and using the model repeatedly after one model is built,
whose digital simulation model is based on the geometry features and which making use of the
simulation software's data analysis interface and redevelop technology.
The key segment of simulation tool layer of platform lies realizing the integration and coordination of simulation data to guarantee the integrity, being latest and track ability of data during the whole simulation course.
The strategy of simulation is to build the perfect model and obtain the most accurate simulation result in the shortest time, during which the different sophisticated commercial software which fit this stage best is used in different stages and the data transformation in different stages is realized with the special interface of the software themselves.
Furthermore, the leading-in of PDM guarantees the correct data is transferred the exact persons with the correct way[4].
CAE technology supporting noise reduction design of electric locomotive wheel A.
The key segment of simulation tool layer of platform lies realizing the integration and coordination of simulation data to guarantee the integrity, being latest and track ability of data during the whole simulation course.
The strategy of simulation is to build the perfect model and obtain the most accurate simulation result in the shortest time, during which the different sophisticated commercial software which fit this stage best is used in different stages and the data transformation in different stages is realized with the special interface of the software themselves.
Furthermore, the leading-in of PDM guarantees the correct data is transferred the exact persons with the correct way[4].
CAE technology supporting noise reduction design of electric locomotive wheel A.
Online since: September 2013
Authors: Xiao Dong Wang, Jun Tian
Our data structure is a practical linear space data structure that supports range selection queries in time with preprocessing time.
Our data structure is a complete binary tree.
This reduction is applied recursively by the algorithm.
This reduction is applied recursively by the algorithm.
The new data structure has similar or better speed than existing data structures but uses less space in the worst case.
Our data structure is a complete binary tree.
This reduction is applied recursively by the algorithm.
This reduction is applied recursively by the algorithm.
The new data structure has similar or better speed than existing data structures but uses less space in the worst case.
Online since: May 2020
Authors: R.I. Gulyaeva, Svetlana V. Sergeeva, E.N. Selivanov
Transcription of the X-ray patterns was made using the PDF data base [8].
According to the differential thermal and mass spectrometric analysis data (Fig. 3) when heating the ore at a rate of 10 °C /min in argon flow a weight loss of the sample (TG data) had already appeared at the initial stage of heating and came up to 12.2 % at 1100 °C.
Thermogram (argon, 100 C/min,) ore and mass spectrometric analysis of waste gas data.
The experimental data obtained for the ore sample under the study correspond to those presented in the literature [23].
Diffusion and Defect Data.
According to the differential thermal and mass spectrometric analysis data (Fig. 3) when heating the ore at a rate of 10 °C /min in argon flow a weight loss of the sample (TG data) had already appeared at the initial stage of heating and came up to 12.2 % at 1100 °C.
Thermogram (argon, 100 C/min,) ore and mass spectrometric analysis of waste gas data.
The experimental data obtained for the ore sample under the study correspond to those presented in the literature [23].
Diffusion and Defect Data.
Online since: November 2010
Authors: Deng Yue Sun, Yuan Fang Zhang, Xian Wen Zha, Wen Wu Liu, Hui Wei Ma, You Qin Fan
The key technology of the liquid core heavy reduction rolling mill relates to the roller’s normal life cycle in a bad work condition.
Introduction The roller is the important component of the liquid core heavy reduction rolling mill.
Use tensile performance data to estimate the fatigue constant.
This paper use four-point method to calculate the fatigue constant, data can be obtained by monotonic tensile
Shen: Mechanical Engineering Material Properties Data Manual (China Machine Press, China 1994)
Introduction The roller is the important component of the liquid core heavy reduction rolling mill.
Use tensile performance data to estimate the fatigue constant.
This paper use four-point method to calculate the fatigue constant, data can be obtained by monotonic tensile
Shen: Mechanical Engineering Material Properties Data Manual (China Machine Press, China 1994)
Online since: December 2010
Authors: Zhu Qing Yang, Meng Gang Yang
China
amgyang@mail.csu.edu.cn, byzq860618@126.com
Keywords: Self-Anchored Suspension Bridge; Vehicle Braking Force; Viscous Dampers; Vibration Reduction.
Furthermore dynamic responses analysis and vibration reduction optimization of the bridge subject to vehicle braking force are investigated.
At last, the effect of vibration reduction with optimal parameters of viscous dampers is verified.
The empty load rate of heavy car is considered as 40% according to traffic statistical data.
Effect of Vibration Reduction On the basis of the optimal parameters C =8000 kN·s/m and α =0.4 of the dampers, the results of vibration reduction of Pingsheng bridge subject to vehicle braking force are calculated.
Furthermore dynamic responses analysis and vibration reduction optimization of the bridge subject to vehicle braking force are investigated.
At last, the effect of vibration reduction with optimal parameters of viscous dampers is verified.
The empty load rate of heavy car is considered as 40% according to traffic statistical data.
Effect of Vibration Reduction On the basis of the optimal parameters C =8000 kN·s/m and α =0.4 of the dampers, the results of vibration reduction of Pingsheng bridge subject to vehicle braking force are calculated.