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Firstly, analysis was presented for the problem of material demand forecast.
It is the present realistic problem to control the definite reasonable order period in stock scientifically, and to raise management economic benefits Materials demand forecast can influence material supply and the level of management in stock in want factor.
To avoid blindness, it is needed to carry out estimating and the classification with reasonable science for material management.
Literatures take more and more pay attention to the control in stock and the forecast of the material science of spare parts.
Journal of Changchun University of Technology (Natural Science Edition), Vol. 28, No. 4, (2007), p.394-396 [2] Zaid T.

Introduction In the last decade, nanostructured materials have been developed rapidly.
Generally, in grinding of ceramic materials, material removal mechanisms can be classified as inelastic deformation and brittle fracture, the former includes ductile mode grinding and pulverization mode grinding [7-9].
Conclusions This study investigated the material removal mechanisms in grinding of nanostructured materials.
Gallois: Nanostrucrured Materials Vol.10(5) (1998),pp.875-891 [2] H.Chen, X.H.Lin and Y.Zeng, et al: J.Chin.Ceram.Soc.
Zhang: Journal of Japan Society for Abrasive Technology Vol.47(3)(2003),pp.131-134 [8] S.

Journal of Materials Processing Technology Vol. 135 (2003) p. 258–265
Tsinghua Science And Technology.
Dimensional variations of castings and molds in the ceramic mold casting process Journal of Materials Processing Technology 189 (2007) p. 247–255 [4] H.
Journal of Materials Processing Technology Vol. 211 (2011) p. 181–186
Journal of material and design (28). pp. 272-277.

Journal of Manufacturing Science and Engineering, 135 (2013), pp. 041007-041007-7
Journal of Composite Materials, 51 (2017), pp. 1653-1664
International Journal of Thermal Sciences, 94 (2015), pp. 221-227
Journal of Materials Processing Technology, 249 (2017), pp. 96-107
Journal of Materials Science & Technology, 28 (2012), pp. 673-685

This technology uses the abrasive water jet as the polishing tool and quite suits to process the workpiece of brittle materials with the complex surface shapes.
[6] K.Yuzo.Mori, Kazuto Yasutake, Hidekazu Goto, et al.: Journal of Crystal Growth Vol. 275 (2005) p. 39-50
Zhang: Key Engineering Materials Vol. 404 (2009), p. 143-148
Zhang: Advanced Materials Research Vol. 53-54 (2008), p. 363-368
Zhang, et al.: Journal of Micromechanics and Microengineering, Vol. 19 (5) (2009) p. 1-6.

Ultrafine Glass Fiber Core Material Produced by Wet method Tengzhou Xu1,a, Zhaofeng Chen1,b, Jieming Zhou2,c, Xueyu Cheng2,d, Wangping Wu1,e, Zhou Chen1,f 1College of Material Science and technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.
In general, the core materials have fibers, powders and foams [2].
Moreover, volume weight (about 150kg/m3) of the ultrafine glass fiber core materials is smaller than that of conventional insulation core materials, such as fumed silica, precipitated silica and so on.
Therefore, molecular collision doesn’t occur in the interior of core materials.
Lackey: Journal of Cold Regions Engineering, Vol. 22 (2008), p. 103 [2] J.

Refs. [5] and [6] have analyzed the effects of radar absorbing materials on the RCS reduction.
The table shows that after coating radar absorbent materials, the RCS is obviously reduced from 4.88 to 2.62 dbsm.
From the figure we can see that the stealthy materials have a large effect on the reduction of helicopter’s detection probability.
For example, coating radar absorbent materials means an increase in the helicopter’s weight and cost.
[2] J.Y.Li,S.Tang,Journal Of XiDian University,Vol 32(2005) p 414-417

Swain: Journal of Materials Science, Vol. 10(1975), pp. 113-122
Wang: Machining Science and Technolology-An International Journal, Vol. 16(2012), pp. 547-563
Wang: Advanced Materials Research, Vol. 565(2012), pp. 339-344
Hutchings: Tribology: Friction and Wear of Engineering Materials, Edward Arnold, London, 1992
Krinsley: American Journal of Science, Vol. 274(1974), pp. 449-464.

The test parameters and materials used in copper CMP experiment list in table 1.
ACKNOWLEDGEMENT The authors would like to thank the National Nature Science Foundation of China (NSFC) for the supporting and the people involved in the work.
Chinese Journal of Mechanical Engineering,Vol.39(2003), pp.100-105
Science Material Forum, ,Vol.471-472 (2004), pp.26-31
John, et al.: Optimization of tribological properties of silicon dioxide during the chemical mechanical planarization precess, Journal of Electronic materials,Vol.30(2001), pp.1520-1526

Modeling materials: continuum, atomistic and multiscale techniques.
Computational Materials Science, 67, 249-260, 2013 [9] Benedetti I, Gulizzi V, Mallardo V.
Modelling intergranular and transgranular micro-cracking in polycrystalline materials.
Mechanics of Materials, 117, 137-151, 2018 [16] Sfantos GK, Aliabadi MH.
Multiscale modeling of polycrystalline materials: A boundary element approach to material degradation and fracture.