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In the last decade, THz technology gained huge research attention due to promising applications in defense, medical, earth and space science, material characterization, communication, sensing and imaging [1].
In the past decade, metamaterials (MM) have attracted more research attention from physics, material science, and engineering community.
Permittivity and permeability are constitutive electromagnetic parameters of materials.
Patnaik, “Sub-wavelength Graphene Planar nanoantenna for THz Application”, Materials Today: Proceedings, vol. 18, Part 3, pp. 1336-1341, 2019
Novoselov, “The rise of graphene,” Nature Materials, vol. 6, pp. 183–191, 2007

Journal of Materials Science 1993; 28: 5887
Materials Science and Technology 1985; 1: 657
Materials Science and Engineering A 2005; 392: 394
Key Engineering Materials 2004; 260: 14
Materials Chemistry and Physics 2002; 77: 236.

This work aimed to examine the influence of carbonation on the water sorption isotherms of cement materials.
This process is called carbonation, which is a natural aging process for all cement materials.
Pihlajavaara [1] observed an increase in the quantity of evaporable water content in carbonated materials by drying at 105°C.
Materials and methods Mortar.
[2] Houst Y.F., The role of moisture in the carbonation of cementitious materials, International journal for restoration buildings monuments, Vol 2, 1996, pp. 49-66

The objective of this work was to examine the influence of carbonation on the water vapor adsorption desorption isotherms of cement materials.
Introduction The carbonation is a natural aging process for all cement materials.
Therefore, the carbonation at first induces a local accumulation of moisture in the pores. [1] observed an increase in the quantity of evaporable water content in carbonated materials by drying at 105°C.
Pihlajavaara, 1968, Some results of the effect of carbonation on the porosity and pore size distribution of cement past, Materials and Structures, Vol 1, Issue 6, pp. 521-526
[2] Houst Y.F., The role of moisture in the carbonation of cementitious materials, International journal for restoration buildings monuments, Vol 2, 1996, pp. 49-66

Experimental materials In this paper,5A06-O aluminium alloy supplied by the the southwest aluminum (group) co., LTD. is adopted, which sheet thickness 2.0mm, the chemical composition of the alloy shown the table below.
With the increase of temperature, strain rate sensitivity index increased first and then decreased.When T = 400℃, the m value of 0.39, the strongest materials uniform deformation ability.
Journal of mechanical engineering, 2012, 13
Beijing: science press, 2012
Journal of plastic engineering, 2013, 20 (1) : 43-47.

Hungary 2 Research Group for Metals Technology of the Hungarian Academy of Sciences, 1111 Budapest, Goldmann tér 3.
Weight % Base material Oxide layer Dross Cr 18 28,2 35,8 Ni 8,6 2,7 0,99 Fe 70,7 52,2 39,9 Table 5: The chemical composition of the material at the base material, at the oxide film, and at the dross.
In the laser cut material the amount of Cr increases and the amount of Fe and Ni decreases from the base material to the oxide layer and dross.
Journal of Machine Tools & Manufacture 42 (2002) 985-995 [4] A.F.H.
Materials Science Forum, 526 (2006) 133-138.

Experiments Experimental Materials.
When the steel melted totally, the calcium or magnesium powders sintered body was added into the molten steel though the material feeder.
As experimental materials had highly active materials in the test, the argon was used to cut off the air to make sure that the experiment went smoothly.
Chen: Materials Science and Technology Vol. 13 (2005), p. 368-371 [5] J.M.
Arakane: Quarterly Journal of the Japan Welding Society Vol. 21 (2003), p. 267-273

And eventually it gets close to the material yield point with material deformation growing and more homogeneous.Shearing section level comes between the late stage of plastic deformation and the initial stage of the shearing, which is the best period of shearing.
Materials reaches the maximum degree of deformation with shear force decreasing from the maximum value.
（a）A surface points （b）B surface points Fig6 A, B surface points From the materials date, we know the material yield stress point is 908.7, as shown in Fig 8. 5.
Meishan science,2011, (3):1~3 [2] Zhang chun-li．The analysis of 2050mm hot rolling finishing shear shearing section quality [J].
The Chinese Journal of nonferrous metals, 2004 (5): 3~4 [5]Wu Ju-huan.

Materials and Methods Ferro A6M tape was used as the substrate (Ferro Corporation, USA).
Acknowledgements The authors would like to thank the National Natural Science Foundation of China (No. 59905006).
Ma: Materials Science & Engineering, Vol.B94 (2002), pp.48
Dorner: Materials Chemistry & Physics, Vol.87 (2004), pp.173
Ang: Journal of Physics, (2006).

The transfer process of Cr(Ⅵ) in TBP-Span80-kerosene liquid membrane system is following[17], complexation reaction: decomplexation reaction: Material and instruments Kerosene was obtained from market.
Journal of Water Chemistry and Technology. 31(2009) 10-17
Membrane Science. 201(2001) 123-135
Journal of Shaanxi University of Science & Technology. 1(2008) 61-65
Functional Materials. 39(2008) 570-573