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Because the ceramics material is very fragile, and is highly sensitive to the surface flaw, the machining of ceramics material is difficult [1].
The machining methods of ceramics materials mainly include grinding, laser processing, ultrasonic machining and electrical discharge machining (EDM).
Sanders: Journal of Materials Engineering and Performance Volume 13(2004), p. 753-757
Vasilos: Journal of Materials Science Vol. 37 (2002), p. 2587-2590
Deng: Forecast and Decision of Grey System (Huazhong University of Science and Technology Publications, China 1986)

Experimental Materials.
Test materials weight ratio and structures.
Journal of Biological Sciences, 8 (2008) 101-106
[7] Haneefa, A., Bindu, P., Aravind, I., Thomas, S., Studies on tensile and flexural properties of short banana/glass hybrid fiber reinforced polystyrene composites, Journal of Composite Materials, 42 (2008) 1471-1489
R., Oommen, Z., Joseph, K., Thomas, S., A study of the mechanical properties of randomly oriented short banana and sisal hybrid fiber reinforced polyester composites, Journal of Applied Polymer Science, 96 (2005) 1699-1709

Materials Science and Engineering of Powder Metallurgy (in China).
Electrical Engineering Materials (in China).
Journal of Alloys and Compounds.
Materials Review(in China).
The Chinese Journal of Nonferrous Metals(in China).

Jiles: Introduction to Magnetism and Magnetic Materials (Chapman and Hall, London 1998)
De La Rosa: Journal of Magnetism & Magnetic Materials, Vol. 347 (2013), pp. 51-60
Karlík: Materials & Design, Vol. 44 (2013), pp. 548-554
Huo and N.Mohamed: Journal of Materials Science and Technology, Vol. 29 (2013), pp. 673-677
Ktena : Key Engineering Materials, Vol. 495 (2011), pp. 257-260.

The development of fibers used for noise reduction materials is described as well.
Noise reduction materials meet born and hence the blade.
The demands for greater driving comfort and alternative materials are expanding the market for automotive acoustical materials.
Clem: submitted to Journal of Materials Research (2003) [16] L.M.
Journal of Materials Science, Vol.40.

But to be able to speak of materials it is necessary to define materials as substances that make up any product [3].
Table 1 Mechanical properties of the materials used for Speed Flex helmet.
Journal of Dynamic Behavior of Materials, Vol. 5, pp 117-131, 2019
Advances in Science and Engineering, Vol. 2, No. 4, pp 81-88, 2011
International Journal of Kinesiology and Sports Science, Vol. 7, No. 4, pp 53-65, 2019

China a bimhao@sohu.com, b sandyzhang0@yahoo.com Keywords: Cylindrical shell; Functionally graded materials; Nonlinear dynamics.
An analysis on the nonlinear dynamics of a cantilever functionally graded materials(FGM) cylindrical shell subjected to the transversal excitation is presented in thermal environment.Material properties are assumed to be temperature-dependent.
International Journal of Mechanical Sciences, 1999, 41, 309–324
Journal of Sound and Vibration, 2005, 288, 412–22
Isvandizbaei, Vibration of functionally graded cylindrical shells based on different shear deformation shell theories with ring support under various, Journal of Mechanical Science and Technonlgy, 2009, 23, 2072-2084.

It will be hopefully to provide theoretical guidance in the option of sound insulation materials.
The Radiation Efficiency of Different Building Materials Some common building materials are used to calculate the radiation efficiency with 1/3 octave band center frequency.
The critical frequency of the same materials decreases with the thickness of a wall.
[4] Application technical specifications of building materials (Revision).
Zhang: Journal of Shandong Agricultural University (Natural Science).

Existing materials behave differently in different climatic zones.
Test Materials and Experiment Methodology Amokor is a series of liquid polymeric materials that allows you to return the original physical and mechanical properties and even improve them in structural materials, such as concrete, metal, brick, wood, etc.
The research of durability of constructional materials modified by polymeric Silor-ultra additive, SECTION 3, CONSTRUCTION MATERIALS AND PRODUCTS, p. 228
Emelianova, Research of Durability and Structure of the Heavy Concrete Modified by Polymeric Impregnation in the Frigid Climate, Materials Science Forum.
Kychkin, Wood concrete on the basis of Portland cement with silor-ultra additive, Norwegian Journal of development of the International Science, Oslo, Norway. 27 (2019) 63-66

The experiments prove that the model can reduce a number of materials and lessen the pressure of the inventory.
*Project supported by the National Science Foundation under Grant 60873008, and the Natural Science Foundation of Hebei Province under Grant F2008000861. 2.1 Material transformations algorithm Material transformations algorithm is consisted of two segments, the size of the motherboard obtained by the size of order and material size of slab according to size of slab.
This approach has been used in Qinhuangdao Shouqin Metal Materials Co., Ltd.
JOURNAL OF APPLIED SCIENCE, 2002,20(2) :211-214 [2] LUO Xian-de.
Journal of Fuel Cell Science and Technology, February 2010, v7, n1, p0110091-0110095 [7] Van Hentenryck Pascal, Michel Laurent.