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Errors in Observation Height Difference According to the real measurement materials of about 20 measured areas with different geographical conditions, the accuracy of the trigonometric leveling with different side length is statistically calculated, and thus the following empirical formula is concluded
Fujian Construction Science & Technology, 2007-6: 38
Science and Technology Information, 2006-06: 60-62
Journal of Guangxi University (Natural Science Edition), 2006-1: 6-7
Inner Mongolia Science Technology and Economy, 2008-18: 127

Liu2,f 1 School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China 2 Inner Mongolia Xingchangjiang investment corporation of mining, Ordos014300, China azhmhxf@126.com, bycwu@hfut.edu.cn (*corresponding author), cxmhuang808@163.com, dshuxia318@163.com, e290983@sina.com, fqmcs2007@126.com Keywords: porous anodic alumina; Etch tunnel; Aluminum electrolytic capacitors; Electrode aluminum foils Abstract.
Corrosion Science, 50(2008), pp. 1576-1583
Analytical Science, 17(2001), pp. a73-a76
Science, 268 (1995), pp. 1466-1468
The Chinese Journal of Nonferrous Metals, 14 (2004), pp.1627-1631.

Infrastructure development requires high-performance materials.
Construction and Building Materials, 120 (2016), p. 48-53
Key Engineering Materials, 753 (2017), p. 315-320
Materials & Design, 54 (2014), p. 702-707
Construction and Building Materials, 66 (2014), p. 787-794

Study of flow balance and temperature evolution over multiple aluminum extrusion press cycles with HyperXtrude 9.0 Amin Farjad Bastani1,2,a, Trond Aukrust1,b , Inge Skauvik3,c 1 SINTEF Materials and Chemistry, PB-124 Blindern, N-0314 Oslo, Norway 2 Department of Informatics, University of Oslo, PB-1060 Blindern, N-0316 Oslo, Norway 3 Hydro Aluminium a.s R&D Materials Technology, Håvik, N-4265 Karmøy, Norway a amin.farjad@sintef.no, b trond.aukrust@sintef.no, c inge.skauvik@hydro.com Keywords: Aluminum extrusion, flow balance, temperature evolution, FEM, HyperXtrude.
Material model.
Sheppard: Application of finite element method in the hot extrusion of aluminium alloys, Materials Science and Engineering A, Volume 369, Issues 1-2, 25 March 2004, pp. 66-75 [2] X.
Martins, Finite-element modelling of cold forward extrusion, Journal of Materials Processing Technology, Volume 94, Issues 2-3, 29 September 1999, Pages 85-93 [11] B.P.P.A.
Martins, Physical modelling and numerical simulation of the round-to-square forward extrusion, Journal of Materials Processing Technology, Volume 112, Issues 2-3, 25 May 2001, Pages 244-251 [13] HyperXtrude 9.0, Altair Engineering, Inc., Troy, MI 48083-2031 [14] http://diemtech.ing.unibo.it/extrusion07 [15] C.M.

Chinese Journal of Mechanical Engineering.
Journal of Mechanical Strength.
L.YAN: Investigation of compilation of fatigue load spectrum by two-parametric counting method [J]，Chinese Academy of Agricultural Mechanization Sciences.
Chinese Journal of Applied Mechanic.
Chinese Journal of Solid Mechanics.

In the analysis considering material nonlinearity and geometrical nonlinearity, the yield strength of 345 Mpa, the Von Mises yield criterion.
Latticed Shells Stability[M].Beijing:Science Press,1999.
China Civil Engineering Journal, 2006,39(10):6-10(In Chinese) [3] Na Wang．Net shell structure elastic-plastic stability [D]．Haerbin：Harbin Jianzhu University，1991(In Chinese) [4] Xin Chen,Staility Steel Structures Theory and Design [M].Beijing:Science Press,2010.
(In Chinese) [5] Gioncu V.Buckling of reticulated shell:state-of-theart[J].International Journal of Space Structures,1995,10(1):1-46 [6] Yamada S,Takeuchi A,Tada Y,etal.Imperfection senstiveoverall buckling of single-layer latticed domes[J].Journal of Engineering Mechanics,2001, 127(4):382-386 [7] Kato S,Kim J M,Cheong M C.Anew proportioningmethod for member sections of single layer reticulated domes subjected to uniform and ono-uniform loads[J].Engineering Structures,2003,25(10):1265-1278 [8] Yu-de Yin.
China Civil Engineering Journal, 2012,45(5):8-17(In Chinese)

For material at both inlets: V(y)= -6 {y2-(a+b)y+ab)} at x = 0 (bottom left arm) and (5a) V(y) = 6 ( a + – y)( b + – y ) at x = 23L (top right arm), (5b) Neauman boundary conditions are imposed at both exits.
On Dominating Elastico-Viscous Response in Some Complex Flows.Philosophical Transactions of the Royal Society of London Series A, Mathematical and Physical Sciences 308(1502): 199-218
Journal of Non-Newtonian Fluid Mechanics 59(2-3): 111-128
Journal of Computational Physics 186(1): 93-121
International Journal for Numerical Methods in Fluids 10(3): 327-351

Introduction Coal is a very complex material, and its chemical composition varies widely.
Acknowledgment This work was supported by the Natural Science Foundation of Shanxi (20041025).
Liao: Journal of chemical industry and engineering.
Chen: journal of microwares.
Qin: journal of china university of mining and technology.Vol. 31 (2002), p. 225-228

Journal of Natural Disasters.
Bulletin of the Seismological Society of America, Vol. 98 (2008), No. 3, p. 1243–1271 [6] XIONG Yu-chun and FANG Ying-guang: Secondary development of material constitutive model in ADINA software.
Journal of Soil Mechanics and Foundation Division. 96, SM5 (1970), p. 1629-1653 [8] Li Guangxin: Advanced Soil Mechanics (Tsinghua University Press, China 2004).
Chinese Journal of Rock Mechanics and Engineering.
Journal of Hebei Institute of Architectural Science and Technology.

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.
To simulate complex material behaviors, the stated option is chosen [7].
Larger stress is required to cause fracture on harder materials.
[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