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Online since: July 2014
Authors: Guang Yu Tan, Can Liu, Jing Quan Wu, Huan Lao Liu, Feng Wang
Introduction
Axial and radial runouts of mills will make cutting depths and uncut thicknesses of material different among teeth, exacerbate vibration of mills, and then decrease its lifetime.
Material of #45 steel (no hardening), down milling mode, air cooling, speed of 678r/min, sampling frequency of 2034Hz, cutting width of 5mm were applied.
The material was fixed on the dynamometer.
Waveforms of Milling Forces in Tests with Variable Feed (az=0.16 mm) Acknowledgments The authors acknowledge the National Natural Science Foundation of China (51375099, 51375100) for supports.
Tan: Journal of Mechanical Engineering 49 (2013) 185-190.
Material of #45 steel (no hardening), down milling mode, air cooling, speed of 678r/min, sampling frequency of 2034Hz, cutting width of 5mm were applied.
The material was fixed on the dynamometer.
Waveforms of Milling Forces in Tests with Variable Feed (az=0.16 mm) Acknowledgments The authors acknowledge the National Natural Science Foundation of China (51375099, 51375100) for supports.
Tan: Journal of Mechanical Engineering 49 (2013) 185-190.
Online since: December 2012
Authors: Wen Hui Zhang, Zhe Wang, Yi Gong, Xue Hong Wu, Yan Li Lu
The diameter is 10mm and the thickness is 1mm semi-hard copper tubes which chosen as the material for all system components.
Tans-critical CO2 Refrigeration system diagram with measurement points Table 1 Dimensions of the heat exchangers Heat Exchangers Gas cooler Evaporator IHX Configuration Inner Tube OD/Outer Tube OD Coaxial, single pass, 10 rows 6.35 mm/12 mm 16 rows 9.5mm/16mm 2 rows 16mm/20mm Total Heat Transfer Area 0.9m2 1.9m2 0.15m2 Materials Nickel-copper alloy tube Table 2 Ranges and Uncertainties of Measuring Instruments Measured variable Measurement device Calibration range Calibrated accuracy Temperature (°C) Differential pressure(bar) T-type thermocouple Pressure transducers -40.0-200.0 0-35 ±0.5 ±0.1% Pressure(bar) Pressure transducers 0-350 ±0.1% fluid volume rates (m3/h) Magnetic flow meter 1-10 ±0.5% Refrigerant mass flow rate(kg/s) Power consumption (kW) Compressor speed (rpm) Coriolis mass flow meter Digital wattmeter Signal the inverter drive 0-0.3 0-6 0-1450 ±0.2% ±0.5% ±1.5% Circulating water system: including a cooling water, chilled water systems and the external balance
Acknowledgements The authors are indebted to Zhengzhou university of Light Industry and The national science and technology support projects of China (2006 BAJ01A10-07) for the economical support given to the present work and for the grant.
International Journal of Refrigeration, 2008, 31(3): 411-422
Tans-critical CO2 Refrigeration system diagram with measurement points Table 1 Dimensions of the heat exchangers Heat Exchangers Gas cooler Evaporator IHX Configuration Inner Tube OD/Outer Tube OD Coaxial, single pass, 10 rows 6.35 mm/12 mm 16 rows 9.5mm/16mm 2 rows 16mm/20mm Total Heat Transfer Area 0.9m2 1.9m2 0.15m2 Materials Nickel-copper alloy tube Table 2 Ranges and Uncertainties of Measuring Instruments Measured variable Measurement device Calibration range Calibrated accuracy Temperature (°C) Differential pressure(bar) T-type thermocouple Pressure transducers -40.0-200.0 0-35 ±0.5 ±0.1% Pressure(bar) Pressure transducers 0-350 ±0.1% fluid volume rates (m3/h) Magnetic flow meter 1-10 ±0.5% Refrigerant mass flow rate(kg/s) Power consumption (kW) Compressor speed (rpm) Coriolis mass flow meter Digital wattmeter Signal the inverter drive 0-0.3 0-6 0-1450 ±0.2% ±0.5% ±1.5% Circulating water system: including a cooling water, chilled water systems and the external balance
Acknowledgements The authors are indebted to Zhengzhou university of Light Industry and The national science and technology support projects of China (2006 BAJ01A10-07) for the economical support given to the present work and for the grant.
International Journal of Refrigeration, 2008, 31(3): 411-422
Online since: March 2017
Authors: Jian Dong Xing, Yi Min Gao, Zhi Fu Huang, Ming Zheng, Li Qiu Sun, Sheng Qiang Ma
Microstructure and Properties of Fe-B-C Cast Wear-Resistant Alloy
Zhifu huang*, Jiandong Xing, Shengqiang Ma*, Yimin Gao, Ming Zheng,
Liqiu Sun
1State Key Laboratory for Mechanical Behavior Of Materials, Xi’an Jiaotong University,
Xi’an, 710049, China
Email: hzf@mail.xjtu.edu.cn; jdxing@mail.xjtu.edu.cn; sqma@mail.xjtu.edu.cn; ymgao@mail.xjtu.edu.cn; mzheng@mail.xjtu.edu.cn; slq@mail.xjtu.edu.cn
* Correponding author, e-mail: hzf@mail.xjtu.edu.cn; sqma@mail.xjtu.edu.cn
Keywords: Microstructure; Properties; Fe-B-C alloy; Boron; Carbon
Abstract.
Introduction Fe-B-C alloy is a new wear-resistant material, which takes hard boride with a hardness of Hv 1200-1800 as a strengthening phase 1.
Acknowledgement This work was supported by the National Natural Science Foundations of China (51371138), (51301128) and the Program for New Century Excellent Talents in University (NCET-12-0457).
[8] Aso S, Hachisuka M and Goto S:“Phase transformation of iron matrix of Fe-15 mass% Cr-C-B alloys”, Journal of the Japan Institute of Metals, 1998, 61(7), pp. 567-573
Introduction Fe-B-C alloy is a new wear-resistant material, which takes hard boride with a hardness of Hv 1200-1800 as a strengthening phase 1.
Acknowledgement This work was supported by the National Natural Science Foundations of China (51371138), (51301128) and the Program for New Century Excellent Talents in University (NCET-12-0457).
[8] Aso S, Hachisuka M and Goto S:“Phase transformation of iron matrix of Fe-15 mass% Cr-C-B alloys”, Journal of the Japan Institute of Metals, 1998, 61(7), pp. 567-573
Online since: September 2018
Authors: Marina V. Shumeyko, Galina V. Sagamonova, E.V. Sagamonova
Materials and Methods
The world economy is on the verge of a singular explosion in management, that is projected by the middle of this century.
Already now world economy, science and education are preparing for this breakthrough.
Currently the experts in the field of accounting and management use a system of five measurement indicators: in addition to the two known for about 600 years, qualimetrical assessments of economic situations, temporary stages and kinds of activity are introduced into the accounting practice. [2] The streams limited by time frames: material, financial, investment, innovative as measuring categories were first defined by M.
Crandall, Systematic risk management approach for construction projects, Journal of Construction Engineering and Management. 116 (1990) 533-546
Already now world economy, science and education are preparing for this breakthrough.
Currently the experts in the field of accounting and management use a system of five measurement indicators: in addition to the two known for about 600 years, qualimetrical assessments of economic situations, temporary stages and kinds of activity are introduced into the accounting practice. [2] The streams limited by time frames: material, financial, investment, innovative as measuring categories were first defined by M.
Crandall, Systematic risk management approach for construction projects, Journal of Construction Engineering and Management. 116 (1990) 533-546
Online since: June 2018
Authors: Jacques Lacaze, Daniel Monceau, André Ebel, Benoît Malard, Serge Yapi Brou, Loïc Vaissière
To avoid resorting to costly materials such as the Ni-bearing D5S, many attempts at improving the high temperature behavior of ferritic SGI have been carried out.
Therefore, carmakers are considering extending the temperature range of this material.
Rohrig, High-silicon nodular irons, Foundry Trade Journal. 146 (1979) 657–681
Menk, Cast iron alloys for exhaust applications, 10th International Symposium on the Science and Processing of Cast Iron, Mar Del Plata, Argentina. (2014)
Norell, High-Temperature Corrosion of Cast Irons and Cast Steels in Dry Air, Materials Science Forum. 369–372 (2001) 197–204
Therefore, carmakers are considering extending the temperature range of this material.
Rohrig, High-silicon nodular irons, Foundry Trade Journal. 146 (1979) 657–681
Menk, Cast iron alloys for exhaust applications, 10th International Symposium on the Science and Processing of Cast Iron, Mar Del Plata, Argentina. (2014)
Norell, High-Temperature Corrosion of Cast Irons and Cast Steels in Dry Air, Materials Science Forum. 369–372 (2001) 197–204
Online since: October 2008
Authors: Czeslaw Skierbiszewski
Introduction
The potential associated with nitride-based Light Emitting Diodes (LEDs) and Laser Diodes (LDs)
for solid-state lighting has generated a continuing interest in group III-N materials and their alloys.
From that point of view, the growth temperature TG for 2D step flow growth is equal to half the melting point TM of the grown material [2].
Acknowledgements This work was partially supported by the Polish Ministry of Science and Higher Education Grant Number 3T11B04729.
Shimomura, Nature Materials 2 (2003) 735 [9] J.
Lemley, Journal of Physical Chemistry 69, 3455 (1965)
From that point of view, the growth temperature TG for 2D step flow growth is equal to half the melting point TM of the grown material [2].
Acknowledgements This work was partially supported by the Polish Ministry of Science and Higher Education Grant Number 3T11B04729.
Shimomura, Nature Materials 2 (2003) 735 [9] J.
Lemley, Journal of Physical Chemistry 69, 3455 (1965)
Online since: September 2008
Authors: Tilak Dias, W. Hurley, R. Monaragala, R. Wijeyesiriwardana
DDeevveellooppmmeenntt ooff EElleeccttrriiccaallllyy AAccttiivvee TTeexxttiilleess
T Dias*, W Hurley*, R Monaragala* and R Wijeyesiriwardana**
*Textiles and Paper, School of Materials
The University of Manchester, UK
** ReliSen LLC, Bentonville, Arkansas 72712 USA
Introduction
The current generation of textiles, including technical textiles are passive.
Generally textiles are made out of materials of very high electrical resistance and can, therefore, be considered as materials with good electrical insulating properties.
The aim of the paper is to demonstrate the development of electrically active knitted structures and switches which have resulted from the research carried out by my research group in the School of Materials of the University of Manchester, UK.
In knitting science the stitch geometry is defined with one half circle (stitch head), two straight lines (stitch legs) and two quarter circles (stitch feet).
Therefore, our aim was to create the science base to package the chip within a fibre bundle.
Generally textiles are made out of materials of very high electrical resistance and can, therefore, be considered as materials with good electrical insulating properties.
The aim of the paper is to demonstrate the development of electrically active knitted structures and switches which have resulted from the research carried out by my research group in the School of Materials of the University of Manchester, UK.
In knitting science the stitch geometry is defined with one half circle (stitch head), two straight lines (stitch legs) and two quarter circles (stitch feet).
Therefore, our aim was to create the science base to package the chip within a fibre bundle.
Online since: May 2016
Authors: B. Li, T. Li, R. Yi
Journal of Economics, 1987, (21):259-271
China Land Sciences, 2013(7):4-9
Resources Science, 2013(2): 388-395
The Quarterly Journal of Economics, 2012, 127(2):535-586
Journal of Asian and African Studies, 1998, 33(4):345-358.
China Land Sciences, 2013(7):4-9
Resources Science, 2013(2): 388-395
The Quarterly Journal of Economics, 2012, 127(2):535-586
Journal of Asian and African Studies, 1998, 33(4):345-358.
Online since: July 2020
Authors: Waleed Ali Tameemi, Osama Mohaymin Al Qassag, Ali Abdulmohsin Khamees
Introduction
In fact, concrete is one of the most common materials of construction worldwide.
Previous investigations on LWC have been focusing on producing lightweight concrete using different materials including natural and manufactured lightweight aggregates and recycled materials.
Slate, Martinez, Mechanical Properties of High-Strength Lightweight Concrete, ACI Journal Proceedings, 83 (1986) 606-613
[13] ASTM C70 - 13, Standard Test Method for Surface Moisture in Fine Aggregate, American Society for Testing and Materials, 2013
Berntsson, Lightweight Aggregate Concrete, Science, Technology, and Applications, Norwich, New York, 2002
Previous investigations on LWC have been focusing on producing lightweight concrete using different materials including natural and manufactured lightweight aggregates and recycled materials.
Slate, Martinez, Mechanical Properties of High-Strength Lightweight Concrete, ACI Journal Proceedings, 83 (1986) 606-613
[13] ASTM C70 - 13, Standard Test Method for Surface Moisture in Fine Aggregate, American Society for Testing and Materials, 2013
Berntsson, Lightweight Aggregate Concrete, Science, Technology, and Applications, Norwich, New York, 2002
Online since: July 2011
Authors: Hu Chen, Li Yan Huang
Implementation of Space Data Engine
At present, the process of all kinds of thematic space database create includes technique design, material preparation, data acquisition and data storage, etc.
Coal Science and Technology.2009,vol.37,No.3,pp.87-89
Journal of China University of Geosciences(China),2002,3:pp.285-288 [5] Cheng Xian.The application of DDE Technology in The Control and Integration of Information Networks.Jornal of Computer.2005,vol.25,No.7, pp.1770-1771.
Coal Science and Technology.2009,vol.37,No.3,pp.87-89
Journal of China University of Geosciences(China),2002,3:pp.285-288 [5] Cheng Xian.The application of DDE Technology in The Control and Integration of Information Networks.Jornal of Computer.2005,vol.25,No.7, pp.1770-1771.