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We may use fewer samples per scan to speed up the iterative operation, but this may influence inversion precision. 3.1 Layer-by-layer inversion algorithm of dielectric constant In general, because underground media are composed of granular materials, electromagnetic will scatter when propagating in them.
The Application of RBF Neural Network in Material Recognition of Ultra-Wideband Ground-Penetrating Radar.
Chinese Journal of Geophysics. 2006,49(5):1499-1504
Journal of Xiamen University(Natural Science).2008,47(1):31-35 [7] Zhang Chun-cheng, Zhou Zheng-ou.
Journal of Electronics & Information Technology. 2005,27(7):1065-1068

Especially when it comes to cooling of jet turbine blades it is crucial to guarantee hight heat transfer rates in order to avoid material failure since the firing temperatures exceed the melting temperature of the materials used by far [1].
Acknowledgments The authors are grateful for the financial support provided by the Bavarian State Ministry of Education, Science and the Arts.
Perepezko, The Hotter the Engine, the Better, in: Science, volume 326, no.
Oliveira, Comparison of Heat Transfer Augmentation Techniques, in: AIAA journal, volume 41, no. 3, (2003), pp. 337-362
Tay, Determining The Effect Of Dimples On Drag In A Turbulent Channel Flow, in: 49th AIAA Aerospace Sciences Meeting, no.

Fly ash-based geopolymers are new binding materials produced to replace the ordinary Portland cement (OPC) used in concrete.
Geopolymers are members of the family of inorganic polymers in which the chemical compositions of the geopolymer materials are similar to natural zeolitic materials, but the microstructure is amorphous.
Materials and Experimental Details Raw Materials.
Journal of Material Science. 2002, 37: 2311-6
Journal of Materials Science. 2008, 43, pp. 824-831

It is well know that the ozone produced by the operation of huge electric machines on the ground or the ozone produced in the stratosphere by the UV radiation of the sun may have effects on the function of the machines and the flights therein, especially on the properties of polymer materials[2].
Researchers also utilize ozone to activate the surface of solid materials[5].
Elleuch : Materials Science and Engineering A Vol. 527(2010), p. 1649 [4] P.
Constant: Journal of Applied Polymer Science Vol. 118(2010), p. 3024 [5] M.
Liu, D Z Ma and Z Li: European Polymer Journal Vol. 38(2002), p. 661 [8] M.

With the development of car and motorcycle manufacturing, the requirement for materials with lightweight, higher strength and toughness[4] is increasing and the application area of GF-TPU is broadening.
Experiment 3.1 Materials and formulation Glass fiber obtained from Beijing Great Wall reinforced plastic factory.
GF-TPU composite was plasticized and blended by two roll mill, XK-160, Qingdao Huan Yu Science and Technology Corporation 3.3 Processing technique and sample preparation GF-TPU composite was plasticized and blended using XK-160 two roll mill in the following sequence: first TPU plasticized for 2min; then fiber and additive were added in, mixed and milled for 4-6min, discharged and immediately calendared at 0.5mm roller space in rubber refining machine at room temperature.
International Journal of polymeric Materials, 1993, 19(12): 63~74 2.
Journal of Applied Science, 1991, 42: 1835-1844 3 Steinberger R L.

As aluminum alloy is a common material used in impellers, in this paper, orthogonal machining experiments are taken, which aims at find out the laws of multiple factors affecting the surface roughness of aluminum alloy ruled surface blade.
Aiming at the influence of cutter rigidity, 3 main factors are considered: cutter type, cutter material and overhanging length of the cutter.
In this experiment the types of cutters include material and shapes of a cutter, which mainly influence the cutter rigidity.
Journal of Nanjing University of Science and Technology, 2010, 4.
Journal of Heilongjiang Institute of Science and Technology, 2010, 20 (2).

Therefore, neutron radiography can produce images of materials with low atomic number in a matrix of high atomic number materials.
CdTe is widely used as material for gamma ray detectors and imaging devices.
Hatakeyama, S.Fujine, K.Yoneda, M.Matsubayashi, T.Esaka, "Analysis of hydrogen distribution in hydrogen strage alloy using neutron radiography", (Journal of Alloys and Compounds 354, 2003) p.208-215
[4] W.Zou, T.Nakashima, Y.Onishi, A.Koike, B.Shinomiya, H.Morii, Y.Neo, H.Mimura and T.Aoki, "Atomic Number and Electron Density Measurement Using a Conventional X-ray Tube and a CdTe Detector" (Japanese Journal of Applied Physics, 2008, Vol.47) p.7317-7323
"ENDF/B-VII.0: Next Generation Evaluated Nuclear Data Library for Nuclear Science, Technology" (Nuclear DataSheets, 2006, Vol. 107) p.2931-3060.

This is due to the fact that at that angle, shear stress is reached the maximum value and therefore inducing the material damage.
Hull D, Axial Crushing of Glass Fiber Polyester Composite Cones, Composite Science and Technologies 28 (1987) 21-30
Adam, The use of energy absorbing reinforcements in automotive applications, SAMPE Journal, 31(5) (1995) 23-28
Thornton, Energy absorption in composite structures, Journal of Composite Materials, 13 (1979) 247-263
Khalid, Performance of composite cones under axial compression leading, Composites Science and Technologies 6(1) (2002) 17-27

Materials and Experimental program Currently, the concrete bond tests are mainly three types: direct pull steel test, beam test and local bond - slip test.
Materials.
Journal of Zhengzhou University of Technology (2001), 22(3): 65-68
ACI Structural Journal,(1994), 91(3):294-302
Building Science,(2006), 22(4): 51-55.

Steel is the basic material in a lot of industry because many types are developed already.
Sanmogna,: Journal of Material Science, Vol.18, 1543-1548(1983)
Matsumura, Y.Sano: Materials Science and Technology, A468-470, 171-175(2007)
Hennige: Journal of Materials Processing Technology, Vol.103, 102-108(2000).