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Materials Today: Proceedings (2023). doi: 10.1016/j.matpr.2023.03.447 [3] T.
IOP Conference Series: Materials Science and Engineering.
Materials Today: Proceedings 33 (2020): 2540-2546. doi: 10.1016/j.matpr.2019.12.040 [16] V.
IOP Conference Series: Materials Science and Engineering.
IOP Conference Series: Materials Science and Engineering. doi: 10.1088/1757-899X/574/1/012016 [24] A.I.

Polyurethane foam belongs to the group of light, but quite strong materials, and has very low thermal conductivity, low vapour permeability and high adhesion to any materials.
Today, the study of the behavior of these materials is based mainly on experimental research.
The change in Young's modulus for the studied materials was 32%, 22%, and 29%, respectively, for materials with a weight ratio of 1:1, 1.2:1, and 1:1.2, respectively.
Fusek, Loading and unloading curve of foam material based he compression test, Journal of Mechanical Engineering. 69, 3 (2019) 3-8
Lei, Research the Static Compression Test of Polyurethane Foam / Honeycomb Paperboard Composite Material, The Open Materials Science Journal. 9 (2015) 64-70

Biswas: Journal of Sound and Vibration.
Lew: Structural Dynamics & Materials Conference Vol. 5 (1995), p. 2893 [18] T.Y.
Wang et al.: Journal of Kunming University of Science and Technology Vol. 25(2000), p. 64 [21 Q.W.
Wilde: Key Engineering Materials Vol. 293-294 (2005), p. 313 [25] S.
Wang: Journal of South China University of Technology (Natural Science Edition) Vol. 31(2003), p. 91

Table 2 shows the materials for the various parts of the device.
The commercially-available parts are available in several materials; thus, an appropriate material was chosen for each part based on functionality.
The materials chosen for the various parts are biocompatible and have a history of use in medical device production [14,15].
Table 2 Materials selected for parts of the device.
The materials were selected considering the functionality of the parts.

The parameters of structure, material and load are inputed to the software which is compiled by VB, and grid labels precision.
Acknowledgements This work is supported by National Nature Science Foundation under Grant(The Ministry of Finance and Education [2009] NO.365).
Zhang, The International Journal of Advanced Manufacturing Technology, 2005, 26 (1-2)
[4] Liu Rongchang, Sun Huadong, Ma Shu-ying, Chen Lidong, Xue Longquan, Journal of Hebei Normal University of Science & Technology, 2009, 23(4), 25-31.
[7] Ming Luo, Journal of Tianjin Vocational Institutes, 2006, 8(5), 53-56.

(4) Thermal and mechanical properties of the materials change with temperature
(5) The materials obey Von Mises yield criterion
Materials Science and Engineering A, 1999, 271: 477-484 [3] Du S G, Chang T, Wang Z T.
Materials Science and Engineering A, 2000, 292: 8-17 [6] Du S G, Wang Q, Fu L.
Journal of Northwestern Polytechnical University, 2002, 20(2): 180-183 (in Chinese)

Journal of Materials Processing Technology 2008, Vol. 205, p 16–23 [10] Jayant, A.and Kumar, V.
Journal of Materials Processing Technology. 2 0 0 9, Vol. 209, p 102–109
Journal of Achievements in Materials and Manufacturing Engineering 2007, Vol 24(1), p 350-356
Journal of Materials Processing Technology 2007, Vol.183, p 77–87
Journal of Materials Processing Technology 2009, Vol. 209, p 4286–4291

Table 1: Material alloys with their refractive indexes.
Materials used for mirror simulations are shown together with their refractives indexes in Table 1.
Same materials are used for all the VCSEL structures as only I-V characteristics (Power, Voltage and Current) are studied by only varying the number of QWs and reflectivity of the two bragg stacks.
F.R.S., "Xxxiv. on the transmission of light through an atmosphere containing small particles in suspension, and on the origin of the blue of the sky," The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, vol. 47, no. 287, pp. 375-384, 1899
Han, "Distributed bragg reflectors for gan-based vertical-cavity surface-emitting lasers," Applied Sciences, vol. 9, p. 1593, 04 2019

Materials and Methods Materials.
A special emphasis was put on the selection of the wood materials.
Iida: Journal of Wood Science Vol. 49 (2003), p. 140 [3] X.
Wang: Journal of Wood Science Vol. 51 (2005), p. 7 [6] Y.
Wang: Journal of Wood Science Vol. 51 (2005), p. 13

By analyzing mass experiments, the ice tool material, metal material, rotate speed, polishing time and other parameters were found.
In the polishing process, the ice tool material, metal material, rotate speed, polishing time could directly impact the quality of polishing surfaces.
It is analyzed the impact of materials and heat treatment.
Journal of Changchun University of Science and Technology. 2002(02)60-61
Chinese Journal of Mechanical Engineering, 2002(06):51-54