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The "optimal" approximating or fitting of the known data means that the analytical expression of Y = f (x, c) adapted to the background material is used to reflect the dependency between x and Y.
Acknowledgment This research is supported by Achievement Transfer Program of Institutions of Higher Education inChongqing（No. kjzh11221）and Chongqing Engineering Research Center for Metallurgy Inspection & Equipment (No. cstc2011pt-gc70007) , the National Natural Science Funds(NO.51275547) and Research Foundation of Chongqing University of Science & Technology (No.
CK2011B02),the Science & Technology Innovation Foundation of Ministry of Science & Technology for Small-Medium Enterprises(No. 12C26245116128 & No. 12C26215116103） References [1]Jia Bi,Zhang Hua,Shi Jinliang, Chang Jin,Zhang Jia xiang,Fu Wei song.
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Materials and Methods The Source of Bacteria.
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New materials, information, biology, communication, energy, aerospace, electronics and many other fields’ new technique are profoundly changing people's lives, the application of new technique plays a more and more important role in economic growth.
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[9] Kai Tang, Huiyun Zhang, Journal of Hebei University of Technology, 2002,Vol31(6),pp.18-24.
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The metal oxides in AgMeO contact materials include CdO, SnO2, ZnO, CuO, NiO, Bi2O3, Re2O3,etc[4-8].
Silver-metal oxide (AgMeO) electrical contact materials have been carried on a large amount of researches at home and abroad, the results show that composite silver-metal oxide (AgMeO) electrical contact materials, which contain two kinds or more oxidation ,have better performances of wear resistance and welding resistance[9].
Nowadays, composite silver-metal oxide (AgMeO) electrical contact materials researches are mainly focused on AgSnO2In2O3 [10], AgSnO2Bi2O3 [11], AgCuONiO [12], etc.
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Materials and Methods Materials The materials required for the pedicle screw samples included PLA filaments.
Screws with smaller thread spacing are better installed in rigid porous materials [22].
TEM Journal. 13 (2024). 809-817. http://dx.doi.org/10.18421/TEM131-83 [20] P.E.
Materials. 13 (2020). 1-21.
Materials and Design. 96 (2016) 476–489. https://doi.org/10.1016/ j.matdes.2016.01.128

They can appear at any point in a port logistic system, they can interrupt the supply of raw materials or products, they can cause demand fluctuations (peak or collapse), inventory problems (lack or crowding), dispatch delay.
Introduction Supply chain management is responsible for the movement of materials all the way from initial suppliers through to final customers.
Supply chain risk appears as any event that might affect this movement and disrupt the planned flow of materials [3].
They can appear at any point in a supply chain, from initial supplier to the final customer; they can interrupt the supply of raw materials or products, they can cause demand fluctuations (peak or collapse), inventory problems (lack or crowding), dispatch delay.
Rusca, On transport network vulnerability, Transport Problems: an International Scientific Journal, ISSN 596, 127-134, (2012) [2] S.

That knowledge includes both the abstract knowledge of materials and their properties, as well as the embodied knowledge of motion and habit.
There is little room for generalization, but nevertheless this study may shed light on the choices that one particular smith made in one particular instance with respect to available materials and their relationship with their client.
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The material is alloy aluminum.
The material properties are defined as follows: Elastic modulus =73800 MPa, Poisson ratio =0.33.
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According to Hertz contact theory, ignoring the elastic wave in objects and excluding friction, the contact stiffness between the gears as follows Eq. 4: ， ， (4) In Eq. 4, is the Poisson's ratio of two contact materials, is the modulus of elasticity, and are the teeth of the gear, is the modulus, is the helix angle.
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The improvement program is put forward to add the reverse crease recovery angles’ measurement and treat the sum of the reverse crease recovery angles in warp (βj), broad (βw), 45o diagonal (βx) direction β=βj+βw+βx as the index. 2 Experiments 2.1 Materials.
Modern Silk Science and Technology. 26 (2011) 107-109
Journal of Textile Research. 23 (2002) 76-78
Wool Textile Journal. 3 (2001) 17-19