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Electromagnetic Shielding Effectiveness of Carbon Black -carbon Fiber Cement Based Materials Shaowen Huang a, Guanghua Chen b, Qi Luo c, Yuhua Xud School of material science and engineering, Nanchang University, Nanchang , Jiangxi 330031, China ahuangsw@163.com, bchenjianhua8882002@yahoo.com.cn, cchinalodger1@163.com, dxuyuhua@ncu.edu.cn Keywords: shielding effectiveness; cement- based materials; carbon black; carbon fiber Abstract.
Carbon series materials as a shielding medium in cement based electromagnetic shielding materials have been reported in these years [3,4,5], but different conclusions were obtained.
Materials and Methods Materials.
The carbon fiber (PAN-based, 6-10μm diameter, 4-5 mm length) was from ShangHai Hongcheng Carbon Materials Corp.
Bulle Vol .31(1996),p.857 [10] Jingyao CAO,D.D.L.Chung: Cem and Con Res Vol.33 (2003),p.1739 [11] Jingyao Cao,D.D.L.Chung: Carbon Vol. 41 (2003),p.2434 [12] Yue Zhang, Rentao Zhi, Fengwu Zhu, Jimei XIAO,Runzhang Yuan and Shixi Ouyang: Chinese journal of materials research Vol .6(1992), p. 286, In Chinese

In many metallic materials, there is a decrease in the nominal stresses when the ultimate strength is exceeded.
Gurson, Continuum theory of ductile rupture by void nucleation and growth: Part I – Yield criteria and flow rules for porous ductile media, Journal of Engineering Materials and Technology, 99 (1977) 2–15
Journal of Materials Science, 43 (2008) 1897–1909
Journal of Mechanical Science and Technology, 26 (2012) 345–352
Dzioba, Properties of 13KhMF steel after operation and degradation under the laboratory conditions, Materials Science, 46 (2010) 357–364

Being regarded as most ideal materials for automotive applications, solid state hydrogen storage materials should have large gravimetric, large volumetric storage capacity, suitable thermodynamic properties and fast hydrogen sorption and desorption kinetics [1,2].
It is remarkable that the hydrogen storage materials with suitable additives show improved dehydrogenation properties compared with the additives-free materials.
Zhu: Materials today, Vol. 11(2008), p. 36-43
Majzoub: Journal of Materials Chemistry A, Vol. 1(2013), p. 3926-3931
Udovic, et al.: Chemistry of Materials, Vol. 20(2008), p.1245-1247

Obviously, the sharing strength between TSRM and cement concrete was enough. 3.3 Study on TSRM’s resistance to chemicals As a type of road material, TSRM was only 3~5mm thick, which required it have much higher chemical stability than other road materials.
Transition metal chelates as accelerators for epoxy resin systems studies with cobalt acetylacetonate[J]．Journal of Applied Polymer Science, 1990，vol4l(1-2)：319-328
Materials and Structures, 2005, V32(5):515~522
Journal of Materials Engineering and Performance, 1998, vol27(6): 805~811
Journal of Applied Polymer Science.198l，vol26 (3) ：979-986.

Mechanics of Materials [J], 2019, 129, pp.361-374
Computational Materials Science [J], 2014, 85, pp.102-120
International Journal of Mechanical Sciences [J], 2020, 173, pp.105422
International Journal of Mechanical Sciences [J], 2015, 101-102, pp.252-271
International Journal of Mechanical Sciences [J], 2021, p.106891

In recent decades, with the development of functional materials, more and more micro-positioning platform are actuated by the physical or chemical effects of functional materials [3].
Closed magnetic circuit mainly consists of GMM rod and cylinder which is made by magnetic material DT4.
Acknowledgements The works was supported by the National Natural Science Foundation of China (Grant No. 50865008), China Postdoctoral Science Fund (Grant No. 20080431005) and Youth Science Fund of Jiangxi province office of education of China (Grant No.GJJ09611).
Sun: Science in China Series E, Vol. 52 (2009) No.7, pp.1858-1865
Lu: Journal of Nanchang Institute of Technology, Vol.27 (2008) No.6, pp.1-5.

Diffuse reflectance Light on Surface of Biological Material Lianshun Zhang, Wenli Liu College of Science, Civil Aviation University of China Tianjin, China zhangls1963@yahoo.com Keywords: Biological material; Diffuse reflectance; Diffusion equation; Monte Carlo simulation.
Introduction Light propagation in biological material is determined by the optical properties of the material.
The absorption coefficient, scattering coefficient of material reflect the physiological state of material, such as blood sugar and oxygenation as well as possible diseases[1, 2].
Many hundreds of papers concerning DA have been published in journals and conference proceedings during recent years [4].
Acknowledgements This work was jointly supported by the National Natural Science Foundation of China and the Civil Aviation Administration of China (Grant No. 61079010) References [1] K.Furutsu.

On the Issue of Predicting the Strength Characteristics of Dispersed-Hardened Polymeric Composite Materials at the Design Stage of Engineering Products Notin Ilia1, a 1Bauman Moscow State Technical University (BMSTU, 105005, Moscow, Russian Federation, 2nd Baumanskaya St., Bldg. 5, Block 1 ainotin@ya.ru Keywords: particulate filled polymeric composite materials, strength characteristics, composite materials, mechanical engineering, machine building technology Abstract.
The use of new promising materials allows achieving higher operational and technological characteristics of the final product.
Thus, a significant reduction in time and material costs at the stage of preparation of production of products from dispersed-reinforced polymeric composite materials is possible.
Thurn-Albrecht: Journal of Materials Research.
(Science, USSR, 1978) [10] Tarasov V.

Due to the mechanical engineering materials we have three operating modes that can find out the most dangerous place.
Now we need a parameterized position to upload depended on the engineering materials.
The maximum deformation of the entire organization’s engineering materials is 0.735mm, the biggest stress is 5.14Mpa after calculation.
The maximum deformation of the entire organization’s engineering materials is 0.660mm, the biggest stress is 3.77Mpa.
As well as analysis the rack's stability according to the reaction of the structure and the mechanical engineering materials.

Core materials of medium opacity (MO) and high opacity (HO) are designed for discolored teeth.
Materials and Methods Preparation of specimens.
The relative translucency of core materials should be taken into consideration for choice of all ceramic materials.
Acknowledgements This work was supported by National Natural Science Foundation (50973045) and Natural Science Foundation of Guangdong Province (9151051501000072).
Wen, et al.: Chinese Journal of Prosthodontics.