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Online since: September 2013
Authors: Han Neng Ren, Ying Jun Li, Ning Xu
Research on Axis Piezoelectric Six-Component Force/Moment Sensor Clamp Device
Ning Xu1,Han-neng Ren2, Ying-jun Li 3
1No.8511 Research Institute of CASIC, Nanjing,210007, China
2No.8511 Research Institute of CASIC, Nanjing,210007, China
3College of mechanical engineering University of Jinan,Jinan, 250022, China
Key words: Axis six-component force;Piezoelectric Quartz Crystal;Principle of swelling;Holding device
Abstract.
The materials of expanding sleeve are usually spring steels of 65, 65Mn, 55Cr2, 60Cr2, etc [117].
In the meanwhile, the weight and cost would be increased, which is a waste of materials.
Study on Parallel Axis Piezoelectric Six-component Force Sensor, Chinese Journal of Mechanical Engineering. 2010, 46(11): 62-68
The materials of expanding sleeve are usually spring steels of 65, 65Mn, 55Cr2, 60Cr2, etc [117].
In the meanwhile, the weight and cost would be increased, which is a waste of materials.
Study on Parallel Axis Piezoelectric Six-component Force Sensor, Chinese Journal of Mechanical Engineering. 2010, 46(11): 62-68
Online since: January 2019
Authors: Na Yin, Cai Liang Jing, Hai Bo Li, Ren Sheng Chu, Bin Chen
Research Institute of Technology, 69 Yangzhuang Avenue,
Shijingshan District, Beijing, China
2Beijing key Laboratory of Green Recyclable Process for Iron & steel Production Technology, 69 Yangzhuang Avenue, Shijingshan District, Beijing, China
3China Shougang International Trade and Engineering Corporation, Shougang International Building, No.60, North Street, Xizhimen, Haidian District, Beijing, China
aannayin1986@126.com, bjingcailiang@zs.com.cn, clhb2002@126.com, dchurensheng@163.com, eustbchenbin@163.com
Keywords: Rare earth element; Inclusions; Secondary refining
Abstract.
Introduction Since the beginning of the 21st century, large-scale ships and marine structural steel, large bridge steel, oil and natural gas transmission pipeline steel have put forward higher requirements on the performance of steel materials.
A large number of studies have shown that refining grains is an effective means to improve the strength and toughness of steel materials, and adding rare earth elements into molten steel is an effective method for refining grains.
Nonferrous Metals Science and Engineering, 2014, 5(6): 53-59
Introduction Since the beginning of the 21st century, large-scale ships and marine structural steel, large bridge steel, oil and natural gas transmission pipeline steel have put forward higher requirements on the performance of steel materials.
A large number of studies have shown that refining grains is an effective means to improve the strength and toughness of steel materials, and adding rare earth elements into molten steel is an effective method for refining grains.
Nonferrous Metals Science and Engineering, 2014, 5(6): 53-59
Online since: May 2011
Authors: Jia Ping Liu, En Li
Analysis on Non-Balance Insulation in Lhasa
En Li1, a, Jiaping Liu2, b
1No.182 mailbox, Xi’an University of Architecture and Technology, Xi’an, China, 710055
2Architecture School, Xi’an University of Architecture and Technology, Xi’an, China, 710055
alien801@gmail.com, bliujiaping@xauat.edu.cn
Key words: Solar Radiation; Periodic Heat Transfer; Typical Indoor Thermal Environment; Non-Balance Insulation; Limited Overall Heat Transfer Coefficient.
Table 3 Wall configuration Material (from indoor to outdoor) Thermal Residence [m2·k)/W] Heat Storage Coefficient [MJ/m2] Heat Storage Index D 1.
And the key point of this paper is on the compensation of solar radiation for heating energy consumption in winter, the solar radiation in normal direction is the only element to be calculated here. 2.
Trigonometric function curve fitting The patterns of outdoor temperature and solar radiation can be realized as cyclic variation if it is for engineering application with middle accuracy.
Table 3 Wall configuration Material (from indoor to outdoor) Thermal Residence [m2·k)/W] Heat Storage Coefficient [MJ/m2] Heat Storage Index D 1.
And the key point of this paper is on the compensation of solar radiation for heating energy consumption in winter, the solar radiation in normal direction is the only element to be calculated here. 2.
Trigonometric function curve fitting The patterns of outdoor temperature and solar radiation can be realized as cyclic variation if it is for engineering application with middle accuracy.
Online since: August 2013
Authors: Wen Hua Song, Zhen Chen, Miao Zhang, Qing Gong Li
Introduction
Dangerous chemical storage tank farm has high fire risk because of the stored material with fire explosion properties and large storage capacity, in the event of accident, not only results in great hazards, but also directly threatens the personal safety and pollutes the environment, causes huge economic losses.
Acknowledgment This work is supported by the National Natural Science Foundation of China (No. 50974096), Tianjin Application Basis and Advanced Technology Research Program Key Projects (No.10JCZDJC25000), and Tianjin Science and Technology Support Program Key Projects (No.10ZCGYSF01600).
Journal of Fire Protection Engineering,2003 (13):11-361
Acknowledgment This work is supported by the National Natural Science Foundation of China (No. 50974096), Tianjin Application Basis and Advanced Technology Research Program Key Projects (No.10JCZDJC25000), and Tianjin Science and Technology Support Program Key Projects (No.10ZCGYSF01600).
Journal of Fire Protection Engineering,2003 (13):11-361
Online since: September 2022
Authors: Wafaa Borja, Lahcen Daoudi, Nathalie Fagel, Rachid Hakkou, Hicham Elidrissi, Yassine Taha, Youssef Tamraoui
In the ceramic industry, bricks with high compressive strength may be fireproof materials.
As a result, making tests on these construction materials before using them is a necessity [7, 8].
Materials and Methods For the present study, the efficiency of the proposed elaboration method was tested on various materials collected from Marrakech city (Morocco).
The adopted method was developed at the Geo-resources, Geo-environment, and Civil Engineering Laboratory (L3G) of the Faculty of Sciences and Techniques of Marrakech.
Nettleship, Applications of porous ceramics, Key Eng.
As a result, making tests on these construction materials before using them is a necessity [7, 8].
Materials and Methods For the present study, the efficiency of the proposed elaboration method was tested on various materials collected from Marrakech city (Morocco).
The adopted method was developed at the Geo-resources, Geo-environment, and Civil Engineering Laboratory (L3G) of the Faculty of Sciences and Techniques of Marrakech.
Nettleship, Applications of porous ceramics, Key Eng.
Online since: November 2012
Authors: Shi Cai Fan, Wen Ru Li, Tao Peng
A High Precise Automatic Test Platform for the Boards of Wind Power Converter
Shicai Fan1,a,Wenru Li1,b and Tao Peng2,c
1University of Electronic Science and Technology of China, Chengdu, China
2Dong Fang Electric Auto-Control Engineering Company, Limited, Deyang, China
ashicaifan@uestc.edu.cn, bliwenru358@163.com, cpengtao@dea.cn
Keywords: wind power converter; hardware-in-the-loop test platform; FFT spectrum analysis; neural network
Abstract.
Performance Analysis The characteristics of analog signal channels are the key part for evaluating the quality of converter board.
In the detection of the phase shift of A/D current module, zero-crossing method is widely used in the engineer.
The difference is that an FFT is much faster than DFT, and FFT attracts lots of attentions in the engineering application.
In principle, resistance of NTC reduces as the temperature rises, and the relationship between NTC resistance and temperature is showed as , is the resistance value corresponding to the thermodynamic temperature of ;is the reference temperature; is the material coefficient of thermal resistance; is the resistance value corresponding to the thermodynamic temperature of ; As the precision of traditional nonlinear correction method is not satisfying when the noise could not be omitted, BP neural network is used to implement NTC nonlinear sensor calibration.
Performance Analysis The characteristics of analog signal channels are the key part for evaluating the quality of converter board.
In the detection of the phase shift of A/D current module, zero-crossing method is widely used in the engineer.
The difference is that an FFT is much faster than DFT, and FFT attracts lots of attentions in the engineering application.
In principle, resistance of NTC reduces as the temperature rises, and the relationship between NTC resistance and temperature is showed as , is the resistance value corresponding to the thermodynamic temperature of ;is the reference temperature; is the material coefficient of thermal resistance; is the resistance value corresponding to the thermodynamic temperature of ; As the precision of traditional nonlinear correction method is not satisfying when the noise could not be omitted, BP neural network is used to implement NTC nonlinear sensor calibration.
Online since: May 2014
Authors: Shi Jun Li, He Gong, Zi Yu Wu, Man Hua Yu, Shi Ying Wang
Performance index
For the wireless communication system made of JN5148 microcontrollers, the key Performance index affecting the communication distance includes four aspects.
Table 1 The wastage of the wireless signal in actual environment Environmental Factor Influence Degree Example Air © — Wood ©© Wood partition Hecheng Gypsum ©© Partition wall Synthetic Material ©© Sheet partition Asbestos ©© Ceiling Glass ©© Windowpane Water ©©© The wet wood Brick ©©© Bricks-Walls Marble ©©©© The stone wall Cement Concrete ©©©© Bedchamber Iron ©©©©© Reinforced concrete wall Another factor is the multipath effect, so if there are too many obstacles near the wireless module, that will also affect the communication distance and reliability.
Many high-frequency engineers must have such experience.
Now the antenna used by wireless communications equipment, which is for the ISM/SR and can use the frequency band with exemption , has the following kinds: Table 2 The antenna devices Antenna Type Gain Occasion Applicable Helix antenna 0~3.5dB Portable mobile devices Mid-gain chuck antenna 5.5~7dB Fixed or on-board devices High-gain omni-directional antenna 8.5~10dB Outdoor and fixed devices High-gain directional antenna 10~12dB Outdoor fixed devices over a long distance Improvement measures When the geographical environment and electromagnetic environment are determinate, in order to ensure wireless communication stable and reliable, fully dig up the potential of low voltage micro power wireless communications equipment and achieve economic and practical, the following measures can be considered in engineering design [9].
Guo: Journal of Academy of Armored Force Engineering, Vol. 23 (2009), No. 1, p. 65-70
Table 1 The wastage of the wireless signal in actual environment Environmental Factor Influence Degree Example Air © — Wood ©© Wood partition Hecheng Gypsum ©© Partition wall Synthetic Material ©© Sheet partition Asbestos ©© Ceiling Glass ©© Windowpane Water ©©© The wet wood Brick ©©© Bricks-Walls Marble ©©©© The stone wall Cement Concrete ©©©© Bedchamber Iron ©©©©© Reinforced concrete wall Another factor is the multipath effect, so if there are too many obstacles near the wireless module, that will also affect the communication distance and reliability.
Many high-frequency engineers must have such experience.
Now the antenna used by wireless communications equipment, which is for the ISM/SR and can use the frequency band with exemption , has the following kinds: Table 2 The antenna devices Antenna Type Gain Occasion Applicable Helix antenna 0~3.5dB Portable mobile devices Mid-gain chuck antenna 5.5~7dB Fixed or on-board devices High-gain omni-directional antenna 8.5~10dB Outdoor and fixed devices High-gain directional antenna 10~12dB Outdoor fixed devices over a long distance Improvement measures When the geographical environment and electromagnetic environment are determinate, in order to ensure wireless communication stable and reliable, fully dig up the potential of low voltage micro power wireless communications equipment and achieve economic and practical, the following measures can be considered in engineering design [9].
Guo: Journal of Academy of Armored Force Engineering, Vol. 23 (2009), No. 1, p. 65-70
Online since: October 2010
Authors: Jian Cheng Zhou, Ling Cheng, Dong Fang Wu
Novel Biodegradable Polyurethane Foams Synthesized via Ring-opening Oligomerization of Ethylene Carbonate Initiated / Catalyzed by Propylene Glycol / [bmim]Cl-(SnCl2) System
Jiancheng Zhou1,a, Ling Cheng1, b and Dongfang Wu1,c
1 School of Chemistry and Chemical Engineering, Southeast University, Jiangning District, Nanjing 211189, China
a jczhou@seu.edu.cn, bchengling3420127@126.com, cdfwu@seu.edu.cn
Keywords: Poly Ether-carbonate Diols, Ring-opening Oligomerization, Ionic Liquids, Polyurethane, Ethylene Carbonate, Biodegradation
Abstract.
The key to the preparation is to develop biodegradable polyols with low molecular weight, which react with isocyanate to introduce biodegradable chain into the polyurethane.
Ionic liquids, which are noncorrosive and nonflammable organic salts comprising entirely of ions, are liquid at or near room temperature and, as consequence of their nature, show some intriguing features such as extremely low vapor pressure, high thermal stability, ability to retain liquid state over a wide temperature range and ability to dissolve many organic, inorganic and polymeric materials [8].
Experimental Section Materials.
Gogolewski: Journal of Biomedical Materials Research Part A Vol. 67( 2003), p. 813 [2] M.
The key to the preparation is to develop biodegradable polyols with low molecular weight, which react with isocyanate to introduce biodegradable chain into the polyurethane.
Ionic liquids, which are noncorrosive and nonflammable organic salts comprising entirely of ions, are liquid at or near room temperature and, as consequence of their nature, show some intriguing features such as extremely low vapor pressure, high thermal stability, ability to retain liquid state over a wide temperature range and ability to dissolve many organic, inorganic and polymeric materials [8].
Experimental Section Materials.
Gogolewski: Journal of Biomedical Materials Research Part A Vol. 67( 2003), p. 813 [2] M.
Online since: June 2014
Authors: Shao Jun Xin
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.
With the advent of the era of knowledge explosion , stunning speed of updating knowledge , the concept of lifelong learning as more and more people have accepted , while the Marxist Popular Education is a complex system engineering , which requires us to constantly explore learning , broaden horizons Marxist theory to explore its theoretical meaning, so that the times.
First, invest the necessary funds to support the development of key technologies network, building a firm strategic positions.
Mishing, in: Diffusion Processes in Advanced Technological Materials, edtied by D.
Clem: submitted to Journal of Materials Research (2003) [6] [6] P.G.
With the advent of the era of knowledge explosion , stunning speed of updating knowledge , the concept of lifelong learning as more and more people have accepted , while the Marxist Popular Education is a complex system engineering , which requires us to constantly explore learning , broaden horizons Marxist theory to explore its theoretical meaning, so that the times.
First, invest the necessary funds to support the development of key technologies network, building a firm strategic positions.
Mishing, in: Diffusion Processes in Advanced Technological Materials, edtied by D.
Clem: submitted to Journal of Materials Research (2003) [6] [6] P.G.
Online since: March 2008
Authors: Werner Riehemann, Agnieszka Mielczarek, Yvonne Wöckel
Effect of cold rolling on the damping
of as cast Cu - Al - Mn shape memory alloys
Agnieszka Mielczarek, Yvonne Wöckel, Werner Riehemann a
Institute of Materials Engineering and Technology, Clausthal University of Technology,
Agricolastr. 6, D-38678 Clausthal-Zellerfeld, Germany
a werner.riehemann@tu-clausthal.de
Keywords: Cu - Al - Mn, cold rolling, stress induced martensite, shape memory alloys.
For εP = 12 % damping increases again and a maximum in amplitude dependence of damping appears being characteristic for materials with cracks [13 - 15].
This was already reported for many materials for example in [13 - 15].
Conclusions Plastic deformation like cold rolling of Cu - Al - Mn shape memory alloys increases the volume fraction of martensite in the material.
Zak, B.Tonn: Key Eng.
For εP = 12 % damping increases again and a maximum in amplitude dependence of damping appears being characteristic for materials with cracks [13 - 15].
This was already reported for many materials for example in [13 - 15].
Conclusions Plastic deformation like cold rolling of Cu - Al - Mn shape memory alloys increases the volume fraction of martensite in the material.
Zak, B.Tonn: Key Eng.