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Inner insulation materials mainly include transformer oil, oil-paper and paper card.
Resistivity of materials is influenced by many factors such as temperature, humidity, electric field strength and time of power voltage, which results in nonlinearity of electrical field distributions under DC voltage.
In a word, electrical field distributions are resistive and imposed voltage of insulation materials is direct ratio with resistivity.
Electrical field distributions under AC voltage are mainly influenced by dielectric constant of insulation materials, effect on the constant by outside factors is very small, because the difference of the constant is very small.
Electrical field distributions of high-voltage windings are computed, whose superimposed voltage ratio of AC and DC is 1:3, and ratio of dielectric constant of insulation materials is 2:3:4.

In the past, the pharmaceutical enterprises treated the residues as the raw materials of fertilizer and feedstuff to sell.
Absorption materials.
Journal of Hazardous Materials B77 (2000), p. 149-159
Journal of Henan Institute of Science and Technology.
Journal of Hebei University of Science and Technology.

Nagai, Solar Energy Materials, 22 (1991) 107 [3] J.G.
Nakai, Solar Energy Materials, 23 (1991) 25 [5] K.
Grebeniik, Solar Energy Materials, 16 (1987) 113 [10] M.
Lampert, Science and Technology of Electrochromics, Optical Materials Technology for Energy Efficiency and Solar Energy, Toulouse, France, May1992
Grozdanov, Materials Research Bulletin, 36 (2001) 161 [19] E.

Jeffrey, A review of mechanical properties of lead-free solders for electronic packaging, Journal of Materials Science, 2009, 44, (5), 1141-1158
Briziouxd, Cyclic mechanical behaviour of Sn3.0Ag0.5Cu alloy under high temperature isothermal ageing, Materials Science and Engineering: A, 2011, 528, (13-14), 4812-4818
On Electronic Materials and Packing, 2006
Yonghong, et al., Intermetallics Characterization of Lead-Free Solder Joints Under Isothermal Aging, Journal of Electronic Materials, 2008, 37 (8), 1130-1138
Lee, Spalling of intermetallic compounds during the reaction between lead-free solders and electroless Ni-P metallization, Journal of Materials Research, 2004, 19 (8), 2428-2436

Journal of Materials Processing Technology, 123(1), 133-145
Advanced Materials Research, 576, 99-102
Journal of materials processing technology, 209(1), 102-109 [5] F., Dweiri, M., Al-Jarrah, &, H.
Journal of Materials Processing Technology, 133(3), 266-275
In IOP Conference Series: Materials Science and Engineering (Vol. 53, No. 1, p. 012089).

Modified microcrystalline muscovite not only can maintain and improve the performance of composite materials, but also can increases the amount of filling in organic polymer media.
Fan： Journal of Chengdu University of Technology Vol. 27(2000), p. 98-102,in Chinese
Hou：Journal of China powder science and Technology Vol. 8(2002), p. 42-45,in Chinese
Zheng：Journal of china non-metallic mining industry herald Vol. 31(2003), p. 13-16, in Chinese
[4] J.H Lin, L.Wang, M.Deng et.al：Journal of mineralogy and petrology Vol. 25(2005), p. 14-17,in Chinese.

At present, the textile materials metallized processing methods are coating on scattered fiber, coating on filament and coating on knitted fabric.
The principle of density testing method The content of each component of two or more composition materials can be accurate measured by volume density method.
Yalong etal; Ordnance Material Science and Engineering, 2002(5):45-47
Journal of East China University of Science and Technology (Natural Science Edition), 2006,(02):173-176
Journal of Beijing Institute of Clothing Technology (Natural Science Edition), 2007(10):19-24

Hardened tool steels are widely used materials for forming dies, due to their increased strength and hardness.
There has been recently published work on milling hard / difficult to cut materials, such as H13 [2-5].
Materials & Design, 2007. 28(1): p. 272-277
Journal of Materials Processing Technology, 2008. 199(1–3): p. 64-73
Computational Materials Science, 2012. 52(1): p. 298-304

Currently, using X-ray CT scanning technology to detect the macro cracks evolution process in materials has become a new research hot.
Asphalt mixture is no longer the homogeneous material, but seen as the inhomogeneous and anisotropic materials composed of aggregate and asphalt mortar.
CT Test of the Damage Asphalt Mixture Test Materials and Program.
Z.: Materials Science Forum, Vol.5 (2006), p. 229-237 [4] Zhou, H.
N.: Journal of Transport Science and Engineering, Vol.26 (2010), p. 1-9 [7] Wan, C.: South China University of Technology, Vol.13 (2010), p. 11-19 [8] Wang, Z.G.:  Materials Science Forum, Vol.4 (2004), p. 693-706 [9] Zhou, Z.

Fig. 1b Multirun overlapping diagram Fig. 1a Electron beam scanning pattern Experiment Materials and Methods Experiment Materials (1)Basis Materials.
Experiment basis materials are H13 hot-work die steels with quenching and tempering treatment.
[2] Pelletier J M，Sahour M C，Pilloz M，et al.Influence of processing conditions on geometrical features of laser claddings obtained by powder injection [J].Journal of Materials science.1993, 28:5184–5188
Influence of particle fluxes formal target on the characteristics of intense electron beams [J].Vacuum, 2001, 62:97 [5] Pelletier J M，Sahour M C，Pilloz M，et al.Influence of processing conditions on geometrical features of laser claddings obtained by powder injection [J].Journal of Materials science.1993, 28:5184–5188
The research progress of electron beam surface treatment [J].Materials Review.2009.23 (3):89-91