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Test materials and Methods Test Materials.
Pyinkado plates, density 0.451g/cm3, moisture content 12%, were purchased from materials market in Nanning; the specimens were made by slicing processing, their specification size was 10mm×102 mm×305 mm, and all had been processed randomly.
Forest Products Journal, 1995, 45(7P8): 912-916
Roughness and roughness sense of wood surface from different machining processes [J], Journal of Beijing Forestry University, 2005, 27(1): 14-18.
Research on the best work parameters of sand-belts with broadband sanding machine, Forestry Science & Technology, 2009, 34(2): 52-54.

Northwest Science, 64(4):284-293
Northwest Science, 64(4):284-293
Forest products journal, 58(4):66-71
[M] Northwest Plant Journal.9 (1):52-61
Adiposa training materials selection and formulation of the fruiting optimization technology testing.

Aluminum, steel and magnesium are common fixture materials, and the physical properties are listed in Tab.1 [2].
So aluminum is selected for fixture material of the active fixing-board.
Journal of Yancheng institute of technology, 2003, 3(1):43-45
Journal of Mechanical Engineering, 1994, 30(5):40-46
Chengdu: University of Electronic Science and Technology of China, 2004

Nonlinear convection”, Metallurgical and Materials Transactions B, 20B, p883-891, [2].
Kumar.P, Chakraborty.S, Srinivasan.K and Dutta.P, 2003, “Studies on transport phenomena during directional solidification of a non-eutectic binary solution cooled from the top”, Metallurgical and Materials Transactions, 34B, Vol. 6, p899-909, [5].
Sazarin.J.R and Hallawell.A, 1988, “Channel formation in Pb-Sn, Sn-Sb and Pb-Sn-Sb alloy ingots and comparison with the system NH4Cl-H2O” Metallurgical and Materials Transactions A, 19A, p1861-1872 [7].
Stefanescu.D.M, 2002, “Science and engineering of casting solidification”, Kluwer publishers
Trivedi.R, Mazumder.P and Tiwari.S.N, 2002, “The effect of convection on disorder in Primary cellular dendritic arrays”, Metallurgical and Materials Transactions A, Vol.33A, p3763-3775

Modeling of the Temperature Field during Electron Beam Welding of Aluminum Alloy by a Pre-defined Keyhole Yanhong TIAN 1, a, Chunqing WANG1 and Danyang ZHU 2 1 State Key Laboratory of Advanced Welding and Production Technology, Harbin Institute of Technology, Harbin 150001, China 2 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China a tianyh@hit.edu.cn Keywords: Electron Beam Welding; Pre-defined Keyhole; Temperature Field; Modeling.
(3) Where η is the electron beam energy-absorption efficiency of the molten material, P is the welding power, ds is differential area of the keyhole surface.
Considering that the temperature gradient was quite large around the welding zone and the materials properties change seriously, the thermal material parameters were temperature-dependant to increase the accuracy of the heat transfer solution.
H. : Welding Journal.
S.: International Journal of Heat and Mass Transfer Vol. 40(8), (1997), p. 1895-1901 [4] Peter Petrov, Chavdar Georgiev and Georgy Petrov.: Vacuum.

It has been proved by testing properties of the carbons and clinical practice that the silicon-alloyed pyrolytic carbon is optimal in a variety of materials used for mechanical heart valve.
The amount of the pores (porosity) has a great impact on density and mechanical properties of the material.
Acknowledgement This work was supported by the National Natural Science Foundation of China under Grant No 50975070 and the Zhejiang Key Discipline of Marine Technology and Systems.
[2] Jianhui Zhang: Journal of Lanzhou Railway University Vol. 22 (2003), p. 119-121, in Chinese
[6] J.L.Ely, M.R.Emken, J.A.Accuntius, D.S.Wilde, A.D.Haubold, R.B.More and J.C.Bokros: Journal of Heart Valve Disease Vol. 7 (1998), P. 626-632.

Effect of liquid-die-forging pressure on microstructure and mechanical properties of A390 sloping swash-plate Guang-An Zhanga, Feng Jiangb, Qi Zhouc and Fu-Fa Wud School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou 121001, China alutzga@163.com, bfengjiang@163.com, cqizhou@163.com, dffwoo@foxmail.com Keywords: A390 alloy, swash plate, liquid die forging, mechanical properties, structure refinement.
The raw materials are commercial pure aluminum, silicon metal, red copper, pure manganese, commercial pure magnesium, pure zinc, and Al-5%Ti alloy.
Journal of Materials Processing Technology 2003;139:462
Chinese Journal of Materials Research 2000;14:141.

The DeST Simulation Results and Analysis Analysis For Different Thermal Insulation Thickness Of The Wall On Building Energy Consumption The most simple and effective way is to remove the outside wall surface mortar , and then add thermal insulation layer in the surface of palisade structure, according to the ministry of public security fire rating requirements for the wall heat preservation material, this article selects EPS expansion of polystyrene board, as well as the popularization and application of the ministry of construction of the wall exterior insulation materials [3].
Acknowledgements This research is financially supported by the National Science Supported Planning Foundation(2011BAJ03B08）and the Fundamental Research Funds for Lanzhou University of Technology (No.
Journal of northeast forestry university. 2009, 5 (6) : 62-63
The influence of new building materials, 2006
Journal of architectural ventilation and air conditioning heat. 2006, 25 (6), 80-84.

Journal of Composites for Construction, 2010, 14(5): 573-582
Journal of Structural Engineering, 2019, 145(8): 1-17
Journal of Basic Science and Engineering. 2016, 24(04): 804-812.
Construction and Building Materials, 2011, 25(1): 396-405
Journal of Tongji University: Natural Science. 2012, 40(12):1760-1765.

The modulus of core material , the modulus of skin, Poisson’s ratio, and densities.
Becker: Computational Materials Science, Vol.19 (2000),p.108
Sun: Journal of Northwestern Polytechnical University, Vol.24(2006), p.514
Zhang: International Journal of Solids and Structures, Vol.45 (2008), p.2512
Sierakowski: The behavior of structure composed of composite materials. (2nd ed.