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Online since: September 2013
Authors: Jing Wen Xu, Qiong Lian Chen, Peng Wang, Shao Wei Shi, Xin Li
Materials and methods
General situation of the study area.
This study is financially supported by National Natural Science Foundation of China(31101073), the Natural Scientific Research Fund of the Education Department of Sichuan Province(09ZA075), Open Research Fund Program of the Meteorological Center for Huaihe watershed (HRM200905).
(In Chinese with English abstract) [2] Zhao J P,Zhang X F,Bao H Y,et al.Monitoring land surface soil moisture: co-inversion of visible, infrared and passive microwave sensing data[J].Journal of Infrared and Millimeter Waves,2012(2)
This study is financially supported by National Natural Science Foundation of China(31101073), the Natural Scientific Research Fund of the Education Department of Sichuan Province(09ZA075), Open Research Fund Program of the Meteorological Center for Huaihe watershed (HRM200905).
(In Chinese with English abstract) [2] Zhao J P,Zhang X F,Bao H Y,et al.Monitoring land surface soil moisture: co-inversion of visible, infrared and passive microwave sensing data[J].Journal of Infrared and Millimeter Waves,2012(2)
Online since: December 2013
Authors: Yan Dong Song
Material properties and mesh generation.
Fig. 2 Finite element model of the bushing After Mesh generation, just confirmed spatial topological relations of each unit, therefore, establish a property called "Prop" in the [Properties], select the previously created "QT450-10" in dialog box of the input material Properties, and then select whole finite element model of the bushing in the Properties function area dialog box.
Beijing: Science Press, 1997
Journal of Mechanical Design. 2008,4: 589-592
Fig. 2 Finite element model of the bushing After Mesh generation, just confirmed spatial topological relations of each unit, therefore, establish a property called "Prop" in the [Properties], select the previously created "QT450-10" in dialog box of the input material Properties, and then select whole finite element model of the bushing in the Properties function area dialog box.
Beijing: Science Press, 1997
Journal of Mechanical Design. 2008,4: 589-592
Online since: December 2013
Authors: Yu Feng Yin, Jian Gang Ding, Yong Jian Li, Ya Li Na
Therefore,
(15)
(16)
If the oil film thickness of throughout the contact surface is constant,the central film-thickness formula provided by Hamrock and Dowson:
(17)
where,,andare the dimensional parameters for speed,material and load respectively,is the effectve radius along-axis,andis the mean velocity of sliding surfaces.
Figure.4 EHD film formation and contact patch geometry Now,the moment terms of equation(8) can be decribed in terms of traction forces as: (18a) (18b) (18c) The Calculation Example Analysis Examples of slipping a wind turbine angular contact ball bearings.The number of rolling-elements(z)is 16,contact angle(β)is 40°,ball radius(r)is 12.5mm,pitch radius(rp)is77.5mm,ball mass(m)is 64grams,material is stell,lubricant dynamic viscosity(ηo)is0.04Pa.s,reference temperature(Τr)is30˚C,viscosity-pressure coefficient(cηp)is1.2×10-8Pa-1,, viscosity-temperature coefficient(cηT)is0.05˚C-1,thermal conductivity(Kc)is0.125J/(kgK),density(ρ)is 860kg/m3.The rolling-element sliding is represented by cage-slip,which is the deviation of actual cage speed from its corresponding theoretical value: where,is the actual cage speed andis the one calculated from inner-race
[3] Hirano F.Motion of a ball in angular contact ball bearing[J].ASLE.Transaction,1965,8;425-434 [4] Guoding Chen,Jianhua Li,Chegntie Zhang.Analysis of the interaction between high speed bearing components [J].Mechanical science and technology,1998,17(2):268-270.
Study on high speed ball bearing minimum axial force.Journal of Beijing Institute of Technology,2011,9.
Figure.4 EHD film formation and contact patch geometry Now,the moment terms of equation(8) can be decribed in terms of traction forces as: (18a) (18b) (18c) The Calculation Example Analysis Examples of slipping a wind turbine angular contact ball bearings.The number of rolling-elements(z)is 16,contact angle(β)is 40°,ball radius(r)is 12.5mm,pitch radius(rp)is77.5mm,ball mass(m)is 64grams,material is stell,lubricant dynamic viscosity(ηo)is0.04Pa.s,reference temperature(Τr)is30˚C,viscosity-pressure coefficient(cηp)is1.2×10-8Pa-1,, viscosity-temperature coefficient(cηT)is0.05˚C-1,thermal conductivity(Kc)is0.125J/(kgK),density(ρ)is 860kg/m3.The rolling-element sliding is represented by cage-slip,which is the deviation of actual cage speed from its corresponding theoretical value: where,is the actual cage speed andis the one calculated from inner-race
[3] Hirano F.Motion of a ball in angular contact ball bearing[J].ASLE.Transaction,1965,8;425-434 [4] Guoding Chen,Jianhua Li,Chegntie Zhang.Analysis of the interaction between high speed bearing components [J].Mechanical science and technology,1998,17(2):268-270.
Study on high speed ball bearing minimum axial force.Journal of Beijing Institute of Technology,2011,9.
Online since: October 2014
Authors: Ping Hua Zhu, Xin Xin Zhang
In the study presented herein, the polypropylene fiber was used as reinforcing material and iron oxide red as pigment in order to add color.
Experimental Raw Material and.
Acknowledgements The work described in this paper was fully supported by The National Natural Science Foundation of China (No. 51278073), Talent Peak Fund for Six Trades in Jiangsu province (N0.7, 2009) and Prospective joint research project of Jiangsu province (BY2013024-17).
Jiao: submitted to Journal of Harbin Institute of Technology(2007)
Experimental Raw Material and.
Acknowledgements The work described in this paper was fully supported by The National Natural Science Foundation of China (No. 51278073), Talent Peak Fund for Six Trades in Jiangsu province (N0.7, 2009) and Prospective joint research project of Jiangsu province (BY2013024-17).
Jiao: submitted to Journal of Harbin Institute of Technology(2007)
Online since: December 2012
Authors: Yong Sheng Zhang, Chang Ge Hao
Seismic performance
The above of the building is concrete structures, the below is masonry structure, and the different structures have different materials. larger mass of above and small mass of below. the upper part has maximum stiffness while the lower part is soft . masonry structural load passed through the transition layer to the lower framework.
[4] Z.H.An, W.H.Li and F.L.Ma : Changchun Institute of Technology (Natural Science) Vol. 4, No. 2 (2003): 15-23(In Chinese)
Zucchini, Journal of Civil Engineering, vol. 34, (2007):1443-1457
[4] Z.H.An, W.H.Li and F.L.Ma : Changchun Institute of Technology (Natural Science) Vol. 4, No. 2 (2003): 15-23(In Chinese)
Zucchini, Journal of Civil Engineering, vol. 34, (2007):1443-1457
Online since: July 2014
Authors: Ze Lin Niu, Chao Wang, Yan Bo Qi, Jie Sheng Huang, Jun Lin Li
At the same time, it can also cause waste of construction materials.
Underground Structure Reliability Analysis Research Progress.Shijiazhuang Railway Journal, In Chinese, 1995(2):13-19
[7]Gu Rongyan.SPSS 12.0 for Windows Practical tutorial and operation skills.Shanghai: Shanghai Science and Technology Literature Press, In Chinese, 2005,123-142.
Underground Structure Reliability Analysis Research Progress.Shijiazhuang Railway Journal, In Chinese, 1995(2):13-19
[7]Gu Rongyan.SPSS 12.0 for Windows Practical tutorial and operation skills.Shanghai: Shanghai Science and Technology Literature Press, In Chinese, 2005,123-142.
Online since: December 2012
Authors: Da Pei Tang, Jian Ping Wei
Introduction
DC arc plasma torch as an efficient and clean heat source, is widely used in the industrial areas of cutting, welding, painting, metallurgy, chemical industry and waste disposal, as well as materials, aerospace sciences.
Phys,73(10),4759(1993) [6] Dapei Tang, Qin Gao, et al:Chinese Journal Of Applied Mechanics,27(1),200(2010).
Phys,73(10),4759(1993) [6] Dapei Tang, Qin Gao, et al:Chinese Journal Of Applied Mechanics,27(1),200(2010).
Online since: May 2014
Authors: Zhi Hao Li
Application of the two-dimensional code in manufacturing medical devices
Li Zhihao
School of Electronics and Information Engineering, Lanzhou University of Arts and Science, Lanzhou 730000, China
Keywords: two-dimensional code, medical devices, quick response code
Abstract.compared with one dimensional code, the technology of two dimensional code has much more advantages, including a large amount of information, high security, strong damage-resistant ability, simple making, low cost, and so on.
Figure 2 The one-dimensional code and the two-dimensional code Low cost and simple making.The two-dimensional code is a kind of graphics data file; different from the traditional magneto electric information carriers, the two-dimensional code has no strict requirements for its media, and it can be printed on all printing materials, including ordinary papers, stickers, cards, etc.
Optik - International Journal for Light and Electron Optics,2008,12018:
Figure 2 The one-dimensional code and the two-dimensional code Low cost and simple making.The two-dimensional code is a kind of graphics data file; different from the traditional magneto electric information carriers, the two-dimensional code has no strict requirements for its media, and it can be printed on all printing materials, including ordinary papers, stickers, cards, etc.
Optik - International Journal for Light and Electron Optics,2008,12018:
Online since: July 2014
Authors: Xiao Wu Tang, Peng Lu Gan, Heng Yu Wang
The material and chemical properties of the soil are taken directly from Foose et al. [7] for the similar property of the compacted clay liner from Foose et al. [7] and the clay used in Indraratna et al. [5].
The material and the chemical properties of the undisturbed zone and smear zone are summarized in Table 2.
Acknowledgements The authors would like to express their sincere gratitude to National Natural Science Foundation of China (Grant No. 51179168) for the financial support to this study.
Eng., Vol. 124 (1998), p. 180 [6] Indraratna B and Redana IW: Canadian Geotechnical Journal, Vol. 37 (2000), p. 132 [7] Foose G, Benson C and Edil T: J.
The material and the chemical properties of the undisturbed zone and smear zone are summarized in Table 2.
Acknowledgements The authors would like to express their sincere gratitude to National Natural Science Foundation of China (Grant No. 51179168) for the financial support to this study.
Eng., Vol. 124 (1998), p. 180 [6] Indraratna B and Redana IW: Canadian Geotechnical Journal, Vol. 37 (2000), p. 132 [7] Foose G, Benson C and Edil T: J.
Online since: January 2012
Authors: Xiao Mei Dong, Jing Chao Sun, Yi He
Study on Concrete's Temperature Control Measures for Inverted-Siphons during Construction Period
Xiao-mei DONG1, Yi HE1, Jing-chao SUN2
1Luoyang institute of science & technology, Luoyang, China
2China Hydropower Engineering Company in the third Five-Year Plan Board, Xianyang China
e-mail: dongxiaomei999@163.com, e-mail: heyiieee@126.com, e-mail: sunjc2010@126.com
Keywords: temperature; cracks prevention; temperature field
Abstract.
In view of the feature of happy river inverted siphon in the South-to-North Water Diversion Project, the modeling and computation of the limited unit simulation of the inverted siphon’s Type Basic Data of the Simulation The proportion of the concrete Ease of Use Table 1 C30 proportion of concrete number water spray sand % materials (kg/m3) Water reduction Air entraining water cement Fly ash slag sand rock C30 0.38 36 144 355 118 0 736 1017 2.368 9.48 The xingfu river inverted siphon project's ledger wall, the floodgate pillar and the roof concretes use the C30W6F150 concrete, the initial proportioning of the concrete is provided by the middle Wenxian-Boai Ⅲ section laboratory in the South- North Water Transfer Project of the Fifth Bureau of South China's Hydropower, as follows: Thermal parameters The calculation of thermal parameters is provided in Table 2 Table 2 Thermal performance of concrete Concrete numbers Linear expansion coefficient ×10-6/℃ Thermal coefficient
Journal of Hehai University, 2002, 30(5): 12-16(in Chinese)
In view of the feature of happy river inverted siphon in the South-to-North Water Diversion Project, the modeling and computation of the limited unit simulation of the inverted siphon’s Type Basic Data of the Simulation The proportion of the concrete Ease of Use Table 1 C30 proportion of concrete number water spray sand % materials (kg/m3) Water reduction Air entraining water cement Fly ash slag sand rock C30 0.38 36 144 355 118 0 736 1017 2.368 9.48 The xingfu river inverted siphon project's ledger wall, the floodgate pillar and the roof concretes use the C30W6F150 concrete, the initial proportioning of the concrete is provided by the middle Wenxian-Boai Ⅲ section laboratory in the South- North Water Transfer Project of the Fifth Bureau of South China's Hydropower, as follows: Thermal parameters The calculation of thermal parameters is provided in Table 2 Table 2 Thermal performance of concrete Concrete numbers Linear expansion coefficient ×10-6/℃ Thermal coefficient
Journal of Hehai University, 2002, 30(5): 12-16(in Chinese)