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Online since: February 2011
Authors: Juan Zhou, Zhong Hua Yu
Introduction Product quality is the accumulated and combined result of machine, equipment, personnel, environment, material and other elements.
DV, WS, MT, PS, EV are used to represent equipment, workmanship, material, personnel and environment.
Equipment has many attributes such as type attribute, working capacity attribute and state attribute, which can be represented by DVT, DVC, DVS; method can be described by WST,WSI,WSP which present the resources type attribute technological process information attribute and parameter attribute respectively; material includes material type attribute. material performance attribute and material state attribute which are denoted as MTT,MTP,MTS; the factor of personnel consist of type attribute ability attribute and status attribute and these attributes can be represented by PST,PSA,PSS; environment has its basic attribute —EVP.
Acknowledgements This research was partialy funded by the National Natural Science Foundation of China under Grant No. 50835008 and No. 71071138.
References [1] Liao S H.: submitted to Journal of Expert Systems with Applications,(2003)
Online since: November 2012
Authors: S. Taniselass, R. Vairavan, W.M.W. Norhaimi, N. A. Z. Rahman, A. H. M. Shapri, V. Retnasamy, Z. Sauli
The 3-D model is shown in Figure 1.The material properties for the copper wire bond, bond pad and die are shown in Table1.
The material properties of the shear ram is set to an extent with its Young’s modulus substantial large when compared to other materials in this modeling making the shear tool behaves as a rigid body.
Higher shear height will produce less deformation as the material will have higher resistance to plastic deformation at higher height.
[3] Masayasu Ishiko, Masanori Usui, Takashi Ohuchi and Mikio Shirai, “Design concept of wire-bonding reliability improvement by optimizing positioning in power devices”, Microelectronics Journal 37, 2006, p. 262–268
[4] Caiyuan Wang, “The Quality Test of Wire Bonding”, Modern Applied Science Vol 3 No 12, 2009, [5] ASTM F1269-89 “Test Methods for Destructive Shear Testing of Ball Bonds,” 1991 Annual Book of ASTM Standards, Vol. 10.04, 1991, ASTM, Philadelphia
Online since: January 2012
Authors: L. Zhang, Yun Huang, Mei Zhang
China, 400030 2Chongqing Engineering Research Center for Material Surface Precision Machining and Whole Set Equipments, Chongqing, P.R.
Theoretical model is about a single abrasive cutting edge removing material Belt grinding process includes many different shapes of cutting edge grinding the workpiece surface, so applied theoretical model (which helps to explain the abrasive and material surface about the removal process and interaction mechanism) is about a single abrasive cutting edge removing material [3].
When the machined material is determined, if Vickers hardness of material changing is not considered in the process of grinding, Vickers hardness is a certain value.
Acknowledgement This research is supported by the found of science and technology development of Chongqing in China (NO.CSTC 2009AB3057).
Huang: Chinese Journal of Mechanical Engineering: Vol. 18 (2007), p. 2263-2267 [4] G.H.
Online since: May 2011
Authors: Xian Su Cheng, Ru Lin Fu
Synthesis and Flame Retardant Properties of Melamine Modified EH Lignin Rulin Fua, Xiansu Cheng*b College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China arulin_fu@163.com, bchengxiansu@fzu.edu.cn Keywords: EH Lignin, Melamine, Intumescent fame retardant Abstract.
In view of the austere problem that we have to resolved, there has been an increase in research activities targeted at improving the flame ability and thermal stability of materials and more attention had been paid to IFR which is widely used as halogen-free additives in some polymers, rubber and so on, during to its advantages of little smoke and low toxicity [2].
Experimental Materials.
It was widely used to evaluate the flame retardant properties of materials by UL-94 vertical burning tests and LOI measurements.
Suzuki and A.Yamaguchi: Journal of Environmental Polymer Degradation.
Online since: September 2016
Authors: Jia Sheng He, Xiao Ming Zhu, Meng Qi Yan
Calculate the pipes with different piping materials, different longitudinal dimensions crack stress intensity factors at the crack center, and then comparison between fracture toughness of the material, then you could determine whether to extend the crack.
References [1] H.P.Marchenko, Influence of residual stresses on the stress intensity factors for a surface crack in the rail head, Materials Science, 2010,46:1-6
Applied Mechanics and Materials, 2013,341: 851-855
Strength of Materials,2014,46:2-9
International Journal of Solids and Structures,2012,49:2-10
Online since: August 2010
Authors: Qiu Yun Mo, Zhan Kuan Zhang, Hao Li
Introduction The circular sawblade is widely used to cut various materials, such as timber, stone, metals, concrete, etc
Since this method that many spots compressed and force can be correctly controlled,the sawblade is not prone to deform, it benefit to realize the automation of the operation. 4.1 Experimental method and result of the Distribution of tension stresses Experimental material: The sawblades are 64Mn, hardness: HRC42, diameter: 356 mm, thickness: 2.2mm, suit bore diameter: 30mm.
The Science of the Timber Cutting Tool.
Theoretical and Experimental Analysis of Circular Saw Tensioning.Wood Science and Technology, 1979, 13: 211-237
Beijing Forestry University Journal (supplement 2), 1995, 10: 18-24.
Online since: January 2013
Authors: Xiang Hua Peng, Zhi Cha Wang, Min Yu
A Soft-roadbed Settlement Prediction Model Based on RBFNN Xianghua Peng1, a, Zhichao Wang 2, b and Min Yu 3, c 1 Swan College of Central South University of Forestry and Technology, Changsha, Hunan, 410004 2 College of civil engineering and mechanics, Xiangtan University, Xiangtan, Hunan 411105 3 Institute of Rheological Mechanics and Material Engineering, Central South University of Forestry and Technology, Changsha, Hunan, 410004 apxh10000@163.com, b51925401@qq.com, cyumin1999@126.com (corresponding author) Keywords: Soft-roadbed; subgrade settlement; prediction model; RBF Neural Network.
Yu, A mode of RBF Neuron Network Based on Clustering, Natural Science Journal of Xiangtan University, 29(4) (2007) 99-103
Materials Science Forum, 575-578 (2008) s1050-1055
Online since: October 2012
Authors: Chao Jue Yi
However, for the inhomogeneity of concrete material, instability of using environment and different force degree of different part of the steel, there is little situation that steel corrosion in concrete is uniform corrosion in fact.
Steel and concrete bonding is a complex interactions, through which to pass between the two stresses and to coordinate deformation between steel and concrete, so the anchorage performance of steel and concrete is the basic premise that guarantees the co-work between these two kinds of different materials.
Journal of Huaihai Engineering: Humanities and Social Sciences Edition,2002(2):42-44,48.
Heilongjiang science and technology information,2008(23):233.
Online since: October 2010
Authors: Xi Qiu Fan
Considering its high hardness and non-reaction with most of detergents used for cleaning the mold, quartz is selected as the material of the mold, and electron-beam lithography is used to fabricate the mold.
Acknowledgments The Science and Technology Department of Zhejiang Province of China under two programs #2008C14096 and #2009C11148 supported this work.
Lee, et al.: Journal of the Korean Physical Society Vol.55 (2009), p.1720 [2] C.Y.
Zankovych: Materials Science and Engineering: C, Vol.23 (2003), p.23 [5] S.P.
Online since: May 2014
Authors: Xiao Yan Zhang
A scientific and reasonable system test, the assessment methods of the system science, reasonable, friendly interface Good, simple operation, and solves the problem of complicated statistical resulting previous assessment work.
Characteristics and advantages, the above described based on JSP technology is therefore, in the course of evaluation system, using JSP as the presentation layer, JavaBean as the intermediate layer, SQLServer as the technical scheme of database, the structure of the curriculum evaluation in small units has been able to basically meet the needs, and is easy to realize, the need to invest the human, material and financial resources, a relatively small.
Zhou: Applied Mechanics and Materials, 2013 pp. 347-350
Fang: Journal of Xi’an Shiyou University(Natural Science Edition), (2004) No.02, p.74