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Online since: March 2019
Authors: Văn Chien Dinh, Thanh Phu Nguyen, Thanh Hoa Doan, Van Khoa Bui
Materials of coating and substrate
The spray powder used in this study was Cr3C2-20(20Ni80Cr) powder supplied by Oerlikon Metco Company with particle size from 15μm to 45μm and component are 80%Cr3C2, 1.6%Ni, 4%Cr.
Size of samples Material of substrate is steel shaft 40Cr[1010] with component chemistry shown in Table 1.
Proceedings of the Estonian Academy of Sciences, 65(2), 101-106, 2016
Berndt, ASM International, Materials Park, OH, pp. 895-900, 1997
[18] Test methods for build-up thermal spraying – JIS H 8664:2004 [19] Test methods for ceramic sprayed coatings, JSA - JIS H 8666:1994 [20] Standard Test Method for Microindentation Hardness of Materials, ASTM E384 – 17: 2011
Size of samples Material of substrate is steel shaft 40Cr[1010] with component chemistry shown in Table 1.
Proceedings of the Estonian Academy of Sciences, 65(2), 101-106, 2016
Berndt, ASM International, Materials Park, OH, pp. 895-900, 1997
[18] Test methods for build-up thermal spraying – JIS H 8664:2004 [19] Test methods for ceramic sprayed coatings, JSA - JIS H 8666:1994 [20] Standard Test Method for Microindentation Hardness of Materials, ASTM E384 – 17: 2011
Online since: October 2010
Authors: Yusaku Fujii, Kazuhito Shimada, Koichi Maru, William Thornton, Tao Jin
Mizuno, "Development of mass measurement devices for zero-gravity experiments", Applied Mechanics and Materials, (in print)
Miki, “Balance for measuring mass under microgravity conditions”, AIAA Journal, Vol.39, No.3, pp.455-457, 2001
Fujii, “Reconsideration of body mass measurement on the International Space Station and beyond”, Key Engineering Materials, Vols. 381-382, pp 461-464, 2008
Shimada, "Mass Measurement in Space, 1964-2010", Applied Mechanics and Materials, (in print)
Fujii, "Issues with body mass measurement on the International Space Station (ISS)", Applied Mechanics and Materials, (in print).
Miki, “Balance for measuring mass under microgravity conditions”, AIAA Journal, Vol.39, No.3, pp.455-457, 2001
Fujii, “Reconsideration of body mass measurement on the International Space Station and beyond”, Key Engineering Materials, Vols. 381-382, pp 461-464, 2008
Shimada, "Mass Measurement in Space, 1964-2010", Applied Mechanics and Materials, (in print)
Fujii, "Issues with body mass measurement on the International Space Station (ISS)", Applied Mechanics and Materials, (in print).
Online since: November 2011
Authors: Xiao Gang Zhu, Bin Long Lei
Study on safety assessment methods of the penstock of the High head hydropower station using the China standard GB/T 19624-2004
Xiaogang Zhu1, a, and Binlong Lei2,b
1School of Materials Science and Engineering, Southwest Jiaotong University, China, 610031
2School of Materials Science and Engineering, Southwest Jiaotong University, China, 610031
agangxiaozhu20055286@yahoo.cn, blbl-22110@163.com
Keywords: finite element analysis, ultrasonic flaw detection, planar defect, general assessment
Abstract.
Table 1 Geometrical dimension and material characteristics of penstock Inner diameter D/mm Thickness of the penstock t/mm Yang’s modulus E/MPa Poisson’s ratio ν Biggest pressure designed P max /MPa 1200 34 2.0×105 0.3 13.7 Fig.1 Finite element model of penstock Fig.2 Stress-strain curve of Q345 steel 1.2 Results and discussion According to Fig.3, Fig.4, Fig.5 and Fig.6, with the increase of the pressure, the plastic strain of the center of the pipe close becomes larger.
characterization (1)1# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=18 mm,a=9 mm; (2)2# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=28 mm,a=14 mm; (3)3# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=30 mm,a=14 mm; (4)4# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=25 mm,a=12 mm; (5)5# defect is characterized as the longitudinal elliptical internal crack: 2c=1 mm,2a=1 mm,p1=13mm [2,5]. 3.4 Stress calculation The primary film stress of the longitudinal crack in the circumferential weld joints is evaluated as =1.79=216.4Mpa.The primary film stress of the longitudinal crack in the longitudinal weld joints is evaluated as=1.3529=327Mpa.Because the thickness of the penstock is smaller, the primary bending stress is evaluated as =0.The secondary film stress is evaluated as =0.6=228MPa;The secondary bending stress is evaluated as =0[2]. 3.5 Determination of material
The fracture toughness of the material is evaluated as =.The fracture toughness of the material used as assessment is evaluated as =2273.8. 3.6 Calculation of and The andparameters are evaluated as follows [2,5]: =() (4) =() (5) Table 6 Values of and Specimen Number 1 2 3 4 5 /(N.mm-1.5) 772.3 979.2 1024 1396 262.6 /(N.mm-1.5) 813.7 1031 1079 973 183 3.7 Calculation of The parameter of the surface crack in the cylinder is evaluated as follows [2]: =() (6) (7) The parameter of the elliptical internal crack in the cylinder is evaluated as [2]: (8) Where;.
International Journal of Pressure Vessels and Piping82, 2005:787-796
Table 1 Geometrical dimension and material characteristics of penstock Inner diameter D/mm Thickness of the penstock t/mm Yang’s modulus E/MPa Poisson’s ratio ν Biggest pressure designed P max /MPa 1200 34 2.0×105 0.3 13.7 Fig.1 Finite element model of penstock Fig.2 Stress-strain curve of Q345 steel 1.2 Results and discussion According to Fig.3, Fig.4, Fig.5 and Fig.6, with the increase of the pressure, the plastic strain of the center of the pipe close becomes larger.
characterization (1)1# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=18 mm,a=9 mm; (2)2# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=28 mm,a=14 mm; (3)3# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=30 mm,a=14 mm; (4)4# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=25 mm,a=12 mm; (5)5# defect is characterized as the longitudinal elliptical internal crack: 2c=1 mm,2a=1 mm,p1=13mm [2,5]. 3.4 Stress calculation The primary film stress of the longitudinal crack in the circumferential weld joints is evaluated as =1.79=216.4Mpa.The primary film stress of the longitudinal crack in the longitudinal weld joints is evaluated as=1.3529=327Mpa.Because the thickness of the penstock is smaller, the primary bending stress is evaluated as =0.The secondary film stress is evaluated as =0.6=228MPa;The secondary bending stress is evaluated as =0[2]. 3.5 Determination of material
The fracture toughness of the material is evaluated as =.The fracture toughness of the material used as assessment is evaluated as =2273.8. 3.6 Calculation of and The andparameters are evaluated as follows [2,5]: =() (4) =() (5) Table 6 Values of and Specimen Number 1 2 3 4 5 /(N.mm-1.5) 772.3 979.2 1024 1396 262.6 /(N.mm-1.5) 813.7 1031 1079 973 183 3.7 Calculation of The parameter of the surface crack in the cylinder is evaluated as follows [2]: =() (6) (7) The parameter of the elliptical internal crack in the cylinder is evaluated as [2]: (8) Where;.
International Journal of Pressure Vessels and Piping82, 2005:787-796
Online since: May 2013
Authors: Keya Dharamvir, Charanjit Singh, Preeti Singla, Sonal Singhal
Introduction
Nanotubular materials have been the topic of current research interest for their potential applications in various fields such as catalysis, integrated circuits, biosensors, photovoltaic devices, etc. [1-5].
Controlled dimensionality and size of these tubular carbon materials have also been regarded as significant factors that lead to certain unexpected properties, for example, isotropic or anisotropic behavior and region-dependent surface reactivity.
Infrared analysis generally finds encounters associated with carbon materials, yet this technique is useful for studying the nature of oxygen surface groups.
Dekker, Logic Circuits with Carbon Nanotube Transistors, Science 294 (2001) 1317-1320
Bharadwaj, Comparative study of carbon nanotube dispersion using surfactants; Journal of Colloid and Interface Science 328 (2008) 421–428
Controlled dimensionality and size of these tubular carbon materials have also been regarded as significant factors that lead to certain unexpected properties, for example, isotropic or anisotropic behavior and region-dependent surface reactivity.
Infrared analysis generally finds encounters associated with carbon materials, yet this technique is useful for studying the nature of oxygen surface groups.
Dekker, Logic Circuits with Carbon Nanotube Transistors, Science 294 (2001) 1317-1320
Bharadwaj, Comparative study of carbon nanotube dispersion using surfactants; Journal of Colloid and Interface Science 328 (2008) 421–428
Online since: November 2011
Authors: Yu Quan Chen, Wan Ting Niu, Lu Yao Zhang, Min Pan
I.Introduction
Magnetic probes has gained widespread interest across several disciplines such as chemistry, life sciences and biomedicine due to its excellent magnetic control properties, and can be used in magnetic separation[1], molecular imaging[2], intracellular hyperthermia[3] as well as drug delivery system[4].
II.Materials and Methods A Reagents and Instruments All chemicals were analytical reagent grade without further purification.
III.Results and Discussions A Morphology and diameter of dextran coated SPIO Fig. 1 (A) TEM image of dextran coated SPIO and (B) statistical diameter distribution by Micrograph Fig. 1 (A) shows that the morphology of the most of the SPIO was nearly spherical, and dispersed well in water; the diameter of dextran coated SPIO was around 8-10nm, and the superparamagnetic behavior of the materials can be attributed to such a small size.
Pellegrino, “From iron oxide nanoparticles towards advanced iron-based inorganic materials designed for biomedical applications,” Pharmacol.
Xu, “Efficient Synthesis of α-D-Glucose-1-Phosphate by Maltodextrin Phosphorylase Immobilized on Amino-functionalized Magnetic Nanoparticles,” Chinese Journal of Catalysis, vol.31, no.9, pp. 1227-1232, October 2010
II.Materials and Methods A Reagents and Instruments All chemicals were analytical reagent grade without further purification.
III.Results and Discussions A Morphology and diameter of dextran coated SPIO Fig. 1 (A) TEM image of dextran coated SPIO and (B) statistical diameter distribution by Micrograph Fig. 1 (A) shows that the morphology of the most of the SPIO was nearly spherical, and dispersed well in water; the diameter of dextran coated SPIO was around 8-10nm, and the superparamagnetic behavior of the materials can be attributed to such a small size.
Pellegrino, “From iron oxide nanoparticles towards advanced iron-based inorganic materials designed for biomedical applications,” Pharmacol.
Xu, “Efficient Synthesis of α-D-Glucose-1-Phosphate by Maltodextrin Phosphorylase Immobilized on Amino-functionalized Magnetic Nanoparticles,” Chinese Journal of Catalysis, vol.31, no.9, pp. 1227-1232, October 2010
Online since: December 2011
Authors: I. Aubert, J. Jumel, M. Tarek-Lamazouade, Julien Vulliet
Any improvement in materials and/or architecture of interconnects will make this technology more affordable and competitive.
Methods Materials.
Caboche, Journal of power sources, 193 (2009) 136–145 [9] S.
Saintier, Materials Science and Engineering: A, Volume 527, Issues 21-22, (2010), Pages 5858-5866 [11] J.
Chêne, Plastox2007, EDP Sciences, (2009) 131-145
Methods Materials.
Caboche, Journal of power sources, 193 (2009) 136–145 [9] S.
Saintier, Materials Science and Engineering: A, Volume 527, Issues 21-22, (2010), Pages 5858-5866 [11] J.
Chêne, Plastox2007, EDP Sciences, (2009) 131-145
Online since: May 2013
Authors: Bi Hua Zhu, Da Qing Zhu
Automatic Monitoring System for Forest Fire Based on Wireless Sensor Network
Bihua Zhu1, a , Daqing Zhu2,b
1College of Life Sciences, Jiangxi Science &Technology Normal University, China.
2Jiangxi Academy of Environmental Sciences,China.
Secondly, relative humidity of the air can directly affect the fuel moisture evaporation, which can indirectly change the physical properties of combustible material.
Forest fire detection system based on ZigBee wireless sensor network [J], Journal of Beijing Forestry University, v 29, n 4, July, 2007, p 41-45 [3] JIN C,LUO F.
Forest fire detection system based on ZigBee wireless sensor network[J], China Forestry Science and Technology, v 20, n 6, July,p:77-79 [4] Lloret, J., Garcia, M., Bri, D., Sendra, S.: A Wireless Sensor Network Deployment for Rural and Forest Fire Detection and Verification, Sensors 2009, 9, 8722-8747 [5] Datasheet of SHT1x, http://www. sensirion.com [6] Datasheet of CC2530, http://www.chipcon.com
Secondly, relative humidity of the air can directly affect the fuel moisture evaporation, which can indirectly change the physical properties of combustible material.
Forest fire detection system based on ZigBee wireless sensor network [J], Journal of Beijing Forestry University, v 29, n 4, July, 2007, p 41-45 [3] JIN C,LUO F.
Forest fire detection system based on ZigBee wireless sensor network[J], China Forestry Science and Technology, v 20, n 6, July,p:77-79 [4] Lloret, J., Garcia, M., Bri, D., Sendra, S.: A Wireless Sensor Network Deployment for Rural and Forest Fire Detection and Verification, Sensors 2009, 9, 8722-8747 [5] Datasheet of SHT1x, http://www. sensirion.com [6] Datasheet of CC2530, http://www.chipcon.com
Online since: June 2014
Authors: Lan Zhang, Lei Shi, Yan Rong, Hui Ping He
Simulation of the flow-induced crystallization of polypropylene based on molecular kinetic model
Yan Rong1, a, Lei Shi2, b, Huiping He1, c,*, Lan zhang1, d
1 School of Mechanics and Engineering science, Zhengzhou University, 450001, Zhengzhou, China
2 College of Information and Management Science, HeNan Agricultural University, 450002, Zhengzhou, China
arongyan@zzu.edu.cn, bsleicn@126.com, chehuiping@zzu.edu.cn, dielzhang@zzu.edu.cn
* Corresponding author
Keywords: crystallization kinetics, molecular kinetic, rheology, theory and modeling.
They consider the crystallizing system as a suspension of semi-crystalline entities growing and spreading in a matrix of amorphous material and link the crystalline kinetics with free energy variation.
Acknowledgements This work was financially supported by Project funded by China Postdoctoral Science Foundation and Technology Research Key Projects of the Education Department of Henan Province (Grant No. 13A430628, 13A520498) and supported by the key scientific and technological project of Henan Province (Grant No.142102210054).
Bevis: Journal of Applied Polymer Science, Vol. 73,(1999) , p. 2473-2483
They consider the crystallizing system as a suspension of semi-crystalline entities growing and spreading in a matrix of amorphous material and link the crystalline kinetics with free energy variation.
Acknowledgements This work was financially supported by Project funded by China Postdoctoral Science Foundation and Technology Research Key Projects of the Education Department of Henan Province (Grant No. 13A430628, 13A520498) and supported by the key scientific and technological project of Henan Province (Grant No.142102210054).
Bevis: Journal of Applied Polymer Science, Vol. 73,(1999) , p. 2473-2483
Online since: June 2014
Authors: Yong Qi Wang, Hui Zhang
The Research of Speech Recognition in Low SNR Based on GA-SVM
Yong-qi WANG and Hui ZHANG
Shanghai University of Engineering Science Shanghai, China
Wangyongqi17008@163.com, zhanghui@sues.edu.cn
Keywords: Support vector machine, Speech recognition, Genetic algorithm, In low SNR.
In recent years, the intelligent optimization algorithms combine with SVM algorithm to select the appropriate model parameters using optimization algorithms to improve the performance of SVM, attracted widespread attention of researchers. [4] This paper analyzes the noise immunity of SVM model, and uses the genetic algorithm to optimize the penalty factor and kernel function parameters of the training classifier, and make speech recognition experiments by support vector machines with the preferred parameters. to use the manuscript for the book or journal in question.
Should authors use tables or figures from other Publications, they must ask the corresponding publishers to grant them the right to publish this material in their paper.
Acknowledgment “This work was supported in part by the National Natural Science Foundation of China (No. 61272097, 61305014), Innovation Program of Shanghai Municipal Education Commission (No.12ZZ182, 14ZZ156), the Natural Science Foundation of Shanghai, China (No. 13ZR1455200), Key Support Project of Shanghai Science and Technology Committee(13510501400).”
In recent years, the intelligent optimization algorithms combine with SVM algorithm to select the appropriate model parameters using optimization algorithms to improve the performance of SVM, attracted widespread attention of researchers. [4] This paper analyzes the noise immunity of SVM model, and uses the genetic algorithm to optimize the penalty factor and kernel function parameters of the training classifier, and make speech recognition experiments by support vector machines with the preferred parameters. to use the manuscript for the book or journal in question.
Should authors use tables or figures from other Publications, they must ask the corresponding publishers to grant them the right to publish this material in their paper.
Acknowledgment “This work was supported in part by the National Natural Science Foundation of China (No. 61272097, 61305014), Innovation Program of Shanghai Municipal Education Commission (No.12ZZ182, 14ZZ156), the Natural Science Foundation of Shanghai, China (No. 13ZR1455200), Key Support Project of Shanghai Science and Technology Committee(13510501400).”
Online since: October 2013
Authors: Hua Guo, Sheng Wen Yu
Research and Design for High Precision Ultrasonic Distance Measurement System
Hua Guo*1,a, Shengwen Yu2,b
1College of Information Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong, China
2College of Geomatics, Shandong University of Science and Technology, Qingdao, Shandong, China
astone_strong@163.com, bsdkdswyu@126.com
Keywords: Ultrasonic; Distance measurement; Waveform rebuild; Energy attenuation
Abstract.
Ultrasonic speed is affected by the environment temperature and the reflecting surface of the measured object too. the error caused by temperature have compensation algorithm can be used, more mature, will not be discussed, as measured object reflecting surface, in this article assumed to be uniform smooth surface, material and shape do not do in-depth study too.
Journal of Zhengzhou University (Engineering Science). 2006, 27(1): 86-90 [4] Zhang Ke,Liu Hai-gang,Research on a Method of Imploving Ultrasonic Ranging Precision.
Ultrasonic speed is affected by the environment temperature and the reflecting surface of the measured object too. the error caused by temperature have compensation algorithm can be used, more mature, will not be discussed, as measured object reflecting surface, in this article assumed to be uniform smooth surface, material and shape do not do in-depth study too.
Journal of Zhengzhou University (Engineering Science). 2006, 27(1): 86-90 [4] Zhang Ke,Liu Hai-gang,Research on a Method of Imploving Ultrasonic Ranging Precision.