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where κ, which is a numerical parameter, is given by κ=πϵE'3K2ƐRK (2) where, for the reduced elastic modulus E', the following relationship holds: 2E'= 1- v12E1+ 1- v22E2 (3) E1, E2, v1, and ν2 are the modulus of elasticity and Poisson's ratios of the materials of each body in contact.
International Journal of Advanced Engineering Research and Science, v. 8, p. 397-407, (2021)
Journal of Basic Engineering, v. 82(2), p. 309-320, (1960)
Journal of Tribology, v. 124(1), p. 82-90, (2002)
Journal of Tribology, v. 125(3), p. 487-498, (2003)

If it is necessary to combine conflicting properties in one material, one should use the principle of the necessary property while ensuring a sufficient level of other properties Of course, for each group of materials a specific content is invested in this principle, depending on their functional purpose.
In this regard, more durable conductive materials are putted into practice, not copper.
Berent, Materials and properties of electrical contacts in railway devices, Intext, Moscow, 2005 [2] I.S.
Sulitsin, Investigation of Cast Copper Structure, Journal of Harbin Institute of Technology (New Series), 2014, Vol. 21, №5, pp. 107-111 [12] M.V.
Shveikin, Physical metal science, Textbook for high schools, UGTU-UPI, Ekaterinburg, 2001 [15] A.V.

Materials In the present study, two commercially catalytic reforming catalysts (CRC) were used (RG5827 & PR9) (AXens solutions/France).
However, texture covers roughness, waviness, skewness, kurtosis…. etc., So, it is an efficient way for the quantitative measuring of the nano metric dimensional surface roughness and for the visualization of the surface of materials.
AL-Tabbakh, catalytic reforming of heavy naphtha, Iraqi Journal of Chemical and Petroleum Engineering 17(3), (2016), 45-56 [3] S.A.
Soliman, Rougness parameters, Journal of Material Processing Technology, 123, (2002), 133 -145
Khan, AFM characterization of surface mechanical and electrical properties of some common rocks, International Journal of Mining Science and Technology 32(2), (2022), 435-445

Chinese Journal of Rock Mechanics and Engineering, 2010, 29(4): 649~664.
Shandong Coal Science and Technology, 2009, (2): 105~107.
Shandong Coal Science and Technology, 2009,(3): 10~11.
Fast drilling and blasting construction technology for deep high stress rock roadway[J].Journal of China Coal Society, 2011, 36(1): 43~48.
Journal of China Coal Society, 2007, 32(2): 113~118.

Jiangsu Province Science & Technology Support Plan—Social Development Project “Research in large quayside crane structural health monitoring and assessment technology” adopts a comprehensive monitoring system using fiber Bragg grating for real-time monitoring of various parameters (strain, ambient temperature, and vibration etc.) at key parts of the crane.
In this year, for the first time, NASA embedded fiber optic sensor in composite material as a trial structural health monitoring system.
In China, Harbin Institute of Technology, Dalian University of Technology, Nanjing University of Science & Technology, Qinghua University, and Chinese Academy of Sciences etc. have carried out research in structural health monitoring technique based on fiber Bragg grating, mainly used for bridges, buildings, and offshore oil-drilling platform.
Zhi and Ou Jin-ping: Intelligent health monitoring and diagnosis system for civil engineering submitted to Journal of Sensor Technology(2001) [2] Jiang.
De-sheng, Liang Lei and Nan Qiu-ming: A experimental study of sensing characteristics of fiber Bragg grating submitted to Journal of Sensor Technology(2003) [3] Y J Rao: Recent progress in applications of in fiber Bragg grating sensors submitted to Journal of Optics and lasers in Engineering (1999)

ACKNOWLEDGMENT This project is sponsored by the National Science Foundation of China (Grant No. 31100415), the Science Foundation of the Fujian Province, China (Grant No. 2010J01255), and Education Department of Fujian Province (No.JA09005).
Biomechanical Analysis of kyphosis after the surgical correction, Biomechanics Materials and Clinical Research, 6 (5) , pp.13-15( 2009)
Experimental analysis of walking and running two gait patterns, Journal of Rehabilitation Medicine, 17 (4) ,pp.233-235(2002)
Research status and progress of gait recognition, Journal of Biomedical Engineering, 25 (5),pp1217-1221(2008)
Luo. biomechanical analysis of the technique of swing leg on the 100 meters running, Zhejiang Sports Science, 23 (2),pp53 -56(2001)

Acknowledgment This work is supported by Guangdong provincial department of science and technology under a science and technology project 2011B031000013, thanks for the financial and laboratory support of AKM electronics Industrial Ltd. and that China Printed Circuit Association adopted the RFID produced by our technology as 2011CPCA SHOW registration card is gratefully acknowledged.
Science. 290(2000) 2123
Chinese Journal of Chromatography. 19(2001) 207~210 [10]Wu.Xiang-Mei, Xiong.Chun-Hua, and Shu.Zeng-nian.
Journal of Chemical Industry and Engineering (China).10(2003) 1466~1469 [11] E.J.J.
The Chinese Journal of Nonferrous Metals .6(1996) 33 [17] K.

An improved method based on FPGA and DSP for designing FBG sensor analyzer Xiaoqing Luo 1, a, Rong Hu 2, b, Bing-hui Zheng 3, c 1 College of Science and Technology, Nanchang University, Nanchang, 330029, China 2 College of Science and Technology, Nanchang University, Nanchang, 330029, China 3 School of Information Science & Technology, Xiamen University, Xiamen, 330029, China aemail: lunwengood@163.com, bemail: ndkjluo@hotmail.com, cemail: huifei0129@163.com Keywords: FBG; FPGA; DSP; Experiment; Wavelength detection Abstract.
There is significant practical value and broad application prospects in the engineering and technical fields of the aerospace, large dam bridges, ships vehicles, tunnel construction, electromagnetic interference, disaster monitoring, intelligent materials, etc.
Journal of Applied Physics, 2009, 105( 6) : 063103 - 063103 - 4
IEEE Journal of Selected Topics in Quantum Electronics, 3 (1997), pp. 290–303 [7] K.
IEEE Journal of Quantum Electronics, 39 (2003), pp. 1216–1228 [9] TSUDA, HIROSHI.

Table 1 Physical and mechanical parameters of materials Item Bulk density KN/m3 Elastic modulus MPa Poisson ratio Tensile strength MPa Compressive strength MPa C35 Concrete 23 31500 0.27 1.57 16.7 ③2 Clay 19.5 17.5 0.2~0.35 / / Partial coefficients are not considered in load.
References [1] Yin Zheng-gang. 3D Finite Element Method Static Analysis on Qiaogong Powerhouse[J]．Enterprise Science and Technology & Development, 2008( 10) : 130-131
Journal of Liaoning Technical University(Natural Science), 2008, 27(3): 342-345
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As the upstream of iron and steel, electric power, building materials and chemical industry, coal industry is an important element concerning the sustainable development of Chinese economy.
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