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Online since: April 2012
Authors: Ge Yan Fu, Shi Hong Shi, Chen Wang, Hou Shun Sun, Hong Yuan Li
Experiment materials and methods Laser used a GS - TFL – 10KW high power transverse CO2 laser.
The substrate material was 45 # steel.
Fig.2 Inclined wall accumulation model of change-diametral rotary parts The inclination angle can be expressed in Eq.(1): (1) Where is interlayer offset rate, ρ is the density of clad material, V is the scanning speed, B is the width of single pass,is the powder delivery rate and is the powder using efficiency.
Acknowledgements The authors acknowledge the financial support of the National Natural Science Foundation of China (grant No. 50975187), and the Science & Technology Plan of Suzhou (SG0923).
Journal of Basic Science and Engineering. 2008, 16(4):616~626
Online since: March 2015
Authors: Chen Qian, Xiao Li Bi
High-rise building is an important type of building in city , which gets two sides: one is that high-rise building consumes a lot of resources in the process of construction and materials, costs a lot of energy in the process of running amounts of waste.
Modern building has some modern technology , including solar reflective material, electric sunshade component and all kinds of instruments outside of walls , which can not only effectively save energy but also add new appearance for building.
The development of the high-rise building, which shows power of science and technology, make architects focus on great importance to the unique function and technical factors than buildings from and emphasis on artistic effect.
Acknowledgement: This article is supported by science and technology project of Urban and Rural housing construction in Gansu Province.
(JK2013-22) References [1]Zhuo Gang.Tall Building Design(Huazhong University of Science & Technology Press,2012) In Chinese [2]Hunan,Discussion on the Modern City Green Ecotype Highrise Construction Design,Chinese and Overseas Architecture,(2010),P154-156.In Chinese [3]Xu Xiaodong,Wang Jianguo.Eco-tactics and method of urban design adapted to climatic condition of hotmoist region in this example.Architectural Journal,(2007),P64-67.In Chinese [4]Leng Hong,Guo Enzhang,Yuan Qing.The Study on The Climate Sensitive Urban Design.Urban Planning Review.(2003),P48-50.
Online since: October 2011
Authors: Yu Li, Le Xia Dong
According to formula (4): MJ/m2 The value of αm is defined by the flammable level of decoration materials in structures, which is shown in Table 1 [7].
Table 1 αm and Flammable Level of Decoration Materials Rank of decoration materials of walls αm /MJ/ m2 A 0.0035 B1 0.014 B2 0.056 B3 0.35 The rank of decoration materials of walls in metro trains is A, so αm is 0.0035MJ/ m2.
Based on above principles, cooling materials must be nontoxic and have powerful heat-absorbing ability to control the temperature.
Table 3 Factors of Three Coolants Materials Factors Ice Liquid nitrogen Dry ice Mass/kg 8.2×103 1.11×104 1.08×104 Volume/m3 10 14 7 Transportation easy difficult difficult Combustion-Supporting no no no Application areas metro platform and train metro platform metro platform Storage easy difficult difficult Process easy difficult difficult Price/thousand Yuan 16.4 330 160 Ice is the best choice of the three materials through comprehensive comparison of mass, transportation, storage and other aspects.
explanation (Japanese corporation inoue academy, Japan2001) [8] Xiujuan Yang: Journal of Safety Science and Technology.
Online since: February 2020
Authors: Samia Aggoune, Cherifa Abid, El Hachemi Amara
This power density is sufficient to melt locally or even vaporize most materials.
Bayraktar, Effects of laser cutting main parameters on microhardness and microstructure changes of stainless steel, Advanced Materials Research. vol. 664, (2013) 811–816
Boujelbene, Effect of laser beam diameter on cut edge of steel plates obtained by laser machining, Applied Mechanics and Materials, vol. 467 (2014) 227– 232
BeyerPrimary losses in disk and CO2 laser beam inert gas fusion cutting, Journal of Materials Processing Technology. 211 (2011) 2050– 2061 [14] A.
Advances in Materials Science and Engineering ID 1242565, (2016) 8 pages.
Online since: December 2012
Authors: Zaki Su’ud
During the reactor operation fissile material accumulates in this central region, which helps to compensate fissile material loss in the peripheral core region and also contributes to negative coolant loss reactivity effect.
During the reactor operation fissile material accumulates in this central region, which helps to compensate fissile material loss in the peripheral core region and also contributes to negative coolant loss reactivity effect.
This fissile material will compensate the fissile material loss in the outer part of the core.
In the present design we put fertile material in the central radial region.
Sekimoto : Design and Safety Aspect of Lead and Lead Bismuth Cooled Long-Life Small-safe Fast Reactor for Various Core Configuration, Journal of Nuclear Science and Technology Vol. 32 no. 9 (1995), pp. 834-845
Online since: May 2023
Authors: Tebogo Mashifana, Motlatso Tladi
Materials and Methods Material.
The raw materials were dried in the oven at temperature of 80 ℃ for 24 hours before use.
Tap water was used when mixing all the three materials to get a paste.
[3] Dai, C. (2012) 'Development of Aluminium Dross-Based Material for Engineering Applications by Submitted to the Faculty Of the Degree of Master of Science in Material Science and Engineering January 2012 Approved: Prof.
Applied Clay Science, 185, 105375
Online since: May 2014
Authors: Jian Jun Wang
This article through to the stadium E (Enterprise Resource Planning)design and analysis project, starting from the industry's external environment and internal environment, the necessity of ERP implementation of enterprise; at the same time the gymnasium industry procurement, sales, production, financial management of the status quo of business model design, and the key technologies of the distribution of raw materials model and inventory cost settlement navigation is designed and analyzed, integrated technology, realizes the information sharing.
ERP system in the planning system include: the main production planning, material requirements planning, capacity planning, purchasing plan, sales plan, profit plan, financial budget and human resources plan, and the plan function and the value of control is fully integrated into the whole supply chain system.
Fang: Journal of Xi’an Shiyou University(Natural Science Edition), (2004) No.02, p.74
Online since: March 2010
Authors: Jia Long Ren, Xiao Yan Guan
The Theoretical Analysis and Experimental Study on Heat-Transfer in Cryogenic Pneumatic Mist Jet Cooling Jialong Ren1,a , Xiaoyan Guan1,b 1 Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, China azjrenjialong@yahoo.com.cn , bguanxiaoyankb@163.com Keywords: Cryogenic pneumatic mist jet cooling, heat-transfer coefficient, cooling experiment.
It can be concluded by transient test in cryogenic pneumatic mist jet cooling high temperature titanium surface with different water flow, that when reaching the best cooling effect, the water flow of cryogenic pneumatic mist jet cooling as well as the materials vaporizing and involving phase change heat-transfer under certain temperature must be equivalent, and at that time, the heat transfer coefficient of cryogenic pneumatic mist jet cooling will reach the maximum.
So we need to build experimental platform such as: Simulation of the materials generating cutting heat continuously in practice cutting, feeding heat to one end of the test sample, cooling the other end of the test sample with different water density in cryogenic pneumatic mist jet cooling, and we should minimize the impact of environmental factors as far as possible , check the changes of the temperature real-timely and transmit it to the Data Acquisition Instrument.
Similarly , when at the temperature of 150 ℃, 200 ℃, 250 ℃ on the titanium alloy test sample surface, Water5, Water6 and Water8 can all be vaporized and processed phase transformation heat-transfer, it is indicated that the best heat transfer coefficient corresponding to materials and temperature must be found for getting the best heat transfer effect.
It is indicated that when reaching the best cooling effect, the water flow of cryogenic pneumatic mist jet as well as the materials vaporizing and involving phase change heat-transfer under certain temperature must be equivalent, and at that time, the heat transfer coefficient of cryogenic pneumatic mist jet cooling will reach the maximum Acknowledgements This work was supported by the Natural Science Foundation of Jiangsu Province (No. 50845064) References [1] Ren Jialong The Study on Sub-dry Cutting GCr1.Chinese Journal of Mechanical Engineering[J], VOL. 15, No.1, 2002 40-42 [2] Xu Hongjun,Fu Yucan,SunFanghong.A basic study on heat affect mechanism and enhancing heat transfer in Contact Zone in efficient Grinding .Science in China(Series E),2002,32(3 ):297-307 [3] Deb S, Yao S C, analysis on Film Boling Heat Transfer of Impacting Spray [J] .Int J Heat Mass Transfer 1989, 32(11): 2099~2112 [4] MeiGuohui MengHongji WuRongyang Analysis of spray cooling heat
Online since: July 2012
Authors: Su Xi Wu, Shan Shan Huang, Zhi Min Zhang, Rui Xing Liu
Materials and Methods Materials and reagents.
The benzo (a) pyrene content in these raw materials and leaching crude oil were listed in Table 2.
The benzo (a) pyrene content in the raw materials and the aqueous enzymatic extracted crude oil were showed in Table 3.
Journal of nanjing normal university, 1992, 26 (3) : 23-26
Food Science, 2011,32 (13): 332-335
Online since: July 2010
Authors: Viboon Sricharoenchaikul, Duangdao Aht-Ong, Chiravoot Pechyen, Duangduen Atong
Bean Waste by Chemical Activation Chiravoot Pechyen1,2,a , Duangdao Aht-Ong1,2,b , Viboon Sricharoenchaikul3,c and Duangduen Atong*,4,c 1 Department of Materials Science, Faculty of Science, Chulalongkorn University, Thailand 2 National Center of Excellence for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, Thailand 3 Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Thailand 4 National Metal and Materials Technology Center, 114 Thailand Science Park, Thailand a chiravoot_p@hotmail.com, bduangdao.a@chula.ac.th, cviboon.sr@chula.ac.th and d duangdua@mtec.or.th Keywords: activated carbon, coffee (Coffea Arabica L.) bean waste, chemical activation Abstract.
Introduction Activated carbon can be prepared from a large number of materials.
These materials are usually high in carbon content but low in inorganic contents.
The chemically activated carbons are found to be of mainly type I which are essentially microporous and mesoporous structure materials.
Sricharoenchaikul: Journal of Solid Mechanics and Materials Engineering Vol. 1 (2007), p. 498-507