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Restricted to materials manufacturing and processing, actually the dielectric constant is anisotropic.
In composite radome system, these two dielectrics are composite material and air.
In the model, one is air gap, and the other is the composite material.
Acknowledgement This work was supported in part by the Shanghai Municipal Science and Technology Commission under Grant 11DZ2260800.
[3] Shengfang Zhang, Dongming Guo, Zhenyuan Jia, Renka Kang and Aifeng Shi: Chinese Journal of Scientific Instrument Vol. 25 (2004), p. 34 In Chinese

You State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 430070, China Keywords: Piezoelectric composite, PZT/PVDF, Piezoelectricity, Solution-mixing Abstract.
Lead acetate (Pb(CH3COO)2), Zirconium oxychloride (ZrOCl2), and tetra-n-butyl titanate (Ti(OC4H9)4, were used as starting materials.
Zhang: Functional Materials.
Wu: Journal of Shanhai University (nature science edition), Vol. 5.No. 2 (Apr.1999), p. 119

For decades, the MCE and magnetic refrigeration materials have been investigated extensively, and many materials with first-order magnetic phase transition, such as Gd5(Si,Ge)4 [1], La(Fe,Si)13 [2], MnFeP1-xAsx [3], and Ni-Mn based Heusler alloys [4-9], have been discovered.
Among these materials, Gd5(Si,Ge)4 has been studied extensively due to its large MCE, in particular, the discovery of the giant magnetocaloric effect in Gd5Si2Ge2 compound [10] has renewed the interest in rare-earth/Si-group alloys in search of materials suitable for magnetic refrigerants.
Therefore, one of the main topics on the study of the MCE is in search of materials with large magnetic entropy change and small hysteresis.
Although these values are smaller than that of most refrigerant materials, the magnetic entropy spread in this sample is larger when compared to that in the giant magnetocaloric material Gd5Si2Ge2 [10].
[18] Volodymyr Svitlyk, Yan Yin Janice Cheung and Yurij Mozharivskyj: Journal of Magnetism and Magnetic Material., Vol. 322 (2010), p.2558

Lv[6] discussed the influence on the maximum stress under operating case using two welding materials at entry of tubesheet structure.
These materials are most commonly used to construct heat exchangers in China.
(3) It is possible that the maximum tensile stress at the tubesheet comprised by the thermal tensile stress and pressure induced tensile stress will exceed the tensile strength of the materials and initiate cracks in the tubesheet.
Acknowledgement This work is supported by the Beijing Natural Science Foundation (Grant No. 3002009) and China Petroleum & Chemical Corporation (Contract No. 308036).
Liu, Q.W.Dong, D.B.Wang, X.Ling: International Journal of Pressure Vessels and Piping 76(1999) 671–675(In chinese) [6] H.

Materials and Methods Composite Manufacturing Initially, the sisal fibers were washed with water and dried at room temperature (25°C) for 48 hours (no chemical treatment was performed).
Five specimens for each condition were tested to obtain the mean values of the mechanical properties of the materials.
Journal of Industrial textiles.
Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials, 13 p. 2017
Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials, 11 p. 2010

One is the cladding materials are pre-placed, it has a poor utilization efficiency of powder particles.
The second is the cladding materials are delivered by side and coaxial powder-feed system.
Chemical compositions of the materials are summarized in Table 1.
[2] R.Barnes, N.Timms, B.Bryden and I.Pashby: Journal of materials Processing Technology, Vol. 138 (2003), pp.411-416
Li, H.Yang, X.Lin, W.Huang, J.Li and Y.Zhou: Materials Science and Engineering-A, Vol. 360 (2003) No.1-2, pp.18-25.

Namely, the guidance for the reasonable selection of materials and design of structure by handling the most unfavorable working state. 2.3 Discussion of SHRP Design Temperature At present, the selection of asphalt materials in pavement design in the domestic is usually according to the PG grading method commended by AASHTO.
The asphalt materials selection according to this method will increase the project cost because of the high low-temperature performance.
The temperature minimum design value of pavement surface according to SHRP does not apply to Heilongjiang region, so materials selection should not fully according to the SHRP standard. 3.
The materials selection in practice is not appropriate to refer to this standard.
Analysis of the Temperature Field in Layered Pavement System [J].Journal of Tongji University (Natural Science),1984,(3)

Consequently, the material removal resulted in lower stress values.
Krawitz: Introduction to diffraction in materials science and engineering, John Wiley 2001, pp.119-143,278-318 [4] J.
Hoffmann, Residual stress relaxation during heating of bearing rings produced in two different manufacturing chains, Journal of Materials Processing Technology 211 (2011) 637–643 [5] N.S.
Olabi, Methods of measuring residual stresses in components, Materials and Design 35 (2012) 572–588 [6] H.K.D.H.
Bhadeshia, Steels for bearings, Progress in Materials Science 57 (2012) 268–435 [7] P.

Acknowledgement It is a project supported by the National Infrastructure for Science and Technology - National Infrastructure of Mineral, Rock and Fossil Specimen Resources, and the Data Resources Integration and Standardized Reorganization for National Special Program on Geological field Basic Science and Technology Research of China (2013FY110900-3).
[5] Ming, Jing Wei, in:  Advanced Materials Research, v 756-759, p 2163-2167, 2013, Information Technology Applications in Industry, Computer Engineering and Materials Science
[6] Huang, Weili, in: Journal of Information and Computational Science, v 5, n 3, p 1217-1224, May 2008
[7] Lin, Jian,Yan, Hua, Wu, Bing , in: Communications in Computer and Information Science, v 238 CCIS, p 211-217, 2011

Experimental Procedures The high strength steel plate (30 * 40 * 0.8 m) from DongFeng mold stamping technology co, ltd, and 6061 aluminum alloy (30 * 40 * 1 mm) were used as base material.
Tensile strength of welding joint is measured on multifunctional material testing machine.
Journal of Materials Science. 2007 [2] Husain H, Razak Daud A, Daud M.
Science & Technology of Welding & Joining.
Science and Technology of Welding and Joining. 2008, 10(2):219-226