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Use cement to mix concrete, apart from the mineral composition of cementitious materials, but also depends on the concrete water-cement ratio.
ACI Materials Journal, 1991:62-69 [3] YuHongfa, MuRu, SunWei, etc.
Journal of Portland, 2005,33 (4): 492 -499 [4] Wang Aiqin, Cao Jianguo, Li Jinyu, etc.
Cement-based composite materials science and technology [C].
Beijing: China's Building Materials Industry Press, 1999. 179-183

Materials and Methods The silicone binder.
The wide area of porous materials enhances the fluid motion.
Terauds, "Evaluating the thermal conductivity of foam plastics," Mechanics of Composite Materials, vol. 26, no. 3, pp. 315-319, 1990
Diamanti, "TiO2 alterations with natural aging: Unveiling the role of nitric acid on NIR reflectance," Solar Energy Materials and Solar Cells, vol. 157, pp. 791-797, 2016
Kaenphakdee et al., "Synthesis Study of Silver-Doped Zinc Oxide for Near-Infrared Shielding Applications," in Materials Science Forum, 2020, vol. 1007: Trans Tech Publ, pp. 143-147

This is a major advantage for welding materials with high thermal conductivity, among which are the copper “based shape memory alloys.
In addition, this process can be used to join different materials, with the welding parameters selected based on the nature and thickness of the materials to be assembled.
Among welding processes, the electric stored-energy welding can be used for joining materials in the thickness range below 0.5 mm, along with ultrasonic welding.
Zhao (Eds.), Shape Memory Materials and Their Applications, Trans Tech Publ.
Hornbogen: Journal of Materials Science 39 (2004) 385– 399

Current ceramic is used as the material for high speed ball bearing for its low density and lubricant performance; however the most common material for the high speed ball screw is chromium-molybdenum steel rather than the ceramic.
Claudio et al [1]. discussed the relation between the equivalent elastic Hertz stress limit (EHLS) and the typical design parameter like materials yield stresses, geometric properties in the contact zone, impact angle, ball screw turning speed, and evaluated the limit rotational speed of ball screws with the re-circulating system manufactured with different materials based on a general elastic–plastic model for contact between curved bodies.
Jiang et al [3]. analyzed the impact behavior of steel ball entering the return tube based on ADAMS software, and several measures are taken to reduce the impact force such as redesigning the elbow bend and the inlet tongue geometry of the return tube, or using better materials, etc.
Acknowledgment The work is supported by National Natural Science Foundations of China (Project# 51075246), National Science and Technology major Project (2009ZX04011-032) and Shandong Youth scientist Foundation (BS2009ZZ006).
Luca, “A general elastic-plastic approach to impact analysis for stress state limit evaluation in ball screw Bearings return system”, International Journal of Impact Engineering, in press

Moure, Materials Characterization 50(2003) p. 203-207
Takahashi, Journal of Materials Science: Materials in Medicine 2 (1991) 51-55 [5] M.M.
Sorell, Materials and Design 24 (2003) p.197-202 [11] C.
Radin, Jounal of Material Science - Materials in Medicine 4 (1993) p.165-168
Laborde, Materials Chemistry and Physics 80 (2003) p. 269-277

Assumed that the friction element material is isotropic, physical properties of the materials keep the same in the process of shifting.
Fig. 8 Changes of slipping line speed Fig. 9 Influence of initial speed on peak pressure change The Influence of Friction Materials.
And there is big difference in exponential growth rate b, as slipping speed v = 15m / s, b= 10.4 for copper-based material and b= 4.4 for paper-based materials.
Fig. 10 Changes of exponential growth rate b corresponding to different friction material Fig. 11 Peak pressure changes with engaging time under different friction materials The Influence of Thermal Conductivity Coefficient.
It is found that copper-based friction material is more sensitive to TEI, compared with paper-based friction materials (2).By analyzing the influence of the initial slipping speed on TEI, it is proved that the initial slipping speed has great impact on maximum pressure

Finite Element Analysis of Two Wheels Scooter Based on Solidworks Zhidong Huang1, a *, Yunpu Du1,b , Liang Zhao1,c , Kegang Zhu1,d , Hong Ji1,e and Rensheng Wang1,f 1Dept. of Mechanical Engineering, Liaoning Institute of Science and Technology, Benxi, Liaoning, 117004, China ahzdstarcraft@126.com, bduyunpu@163.com, czlxh1010@163.com, d873018543@qq.com, e674806236@qq.com, f46668645@qq.com Keywords: scooter, finite element analysis, stress analysis, telescopic mechanism of bar Abstract.
Material Properties.
The material of two wheels scooter is alloy steel and the material properties are listed in Table.1.
Table 1 The material properties.
Li: Journal of Hubei Polytechnic University Vol. 29 (2013), p. 13-16 (In Chinese) [2] T.X.

Based on the statistical analysis, the effects of trocar material and needle insertion speed are: (i) Trocar material: In five out of the six cases for Xdeflect, Ydeflect, and R data, the higher Young’s modulus WC trocar material decreases the average of the needle deflection, for a given insertion speed.
Acknowledgment The authors would also like to acknowledge the support of National Science Foundation Award CMMI#0825795.
Shih: ASME Journal of Manufacturing Science and Engineering, Vol. 132 (2010) p. 051005-1-8
Shih: Proceedings of the Institution of Mechanical Engineers, Part B, Journal of Engineering Manufacture, Vol. 226 (2012) p. 861-869
Shih: submitted to ASME Journal of Manufacturing Science and Engineering, (2012)

Consequently, when needed, we can send the required materials to the specified places via RFID.
Acknowledgement: This work was supported by Science Research Funds(Grant No.
International Journal of Machine Tools & Manufacture, 2003, (43):359-368
International Journal of Operations & Production Management, 1999, 19(10): 1065-1093
Journal of Sichuan Ordnance, 3(2011), p50~52

Introduction There are many factors which effect the surface roughness of the curved parts, such as:the material of part, the tool holder ,the cutter, the material of tool and tool disalignment, milling parameters, machine performance, climb and conventional milling.
Experimental conditions: The workpiece material is mold steel P20.The size is.
Journal of SHANGHAI JIAOTONG University.Vol.37 No.5 May 2003 [2] TANG Gang.Modeling and Simulation Study on Multi-Axis Milled Surface Topography with Round Head Cutter.
Journal of Kuming University of Science and Technology.Vol 32.
Journal of Nanchang University Vol.16.