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Fig. 2 shows the group velocity profiles of quasi-longitudinal wave of the three materials along with propagation angles.
“Finite element analysis of composites materials for aerospace applications.”
IOP Conference Series: Materials Science and Engineering, Vol. 11, No. 1, 2010 [2] Dubois M., Drake Jr T.
“Investigation of accurate imaging of the defects in composite materials using ultrasonic air-coupled technique.”
International Journal of Materials and Product Technology, Vol. 41, pp. 105-116, 2011

Many studies dedicated to exploring the band broadening, beam optimization and new materials [1].
Using new materials.
New materials can effectively enhance and improve the performance of the transducer 4.
Lighter weight materials such as hard aluminum and aluminum-magnesium alloy are usually selected for the front cover, and the rear cover material generally adopt heavy metals such as brass or steel.
Vol.31(2012), p.171 [2] Li K, Lan Y, Li Q: Journal of Harbin Engineering University.

Synthesized nanocomposites were used in preparation of optical and magnetic materials.
Experimental Materials Average molecular weigth of 97% chemically pure PEG is 40 kDa and was purchased from Fluka.
The chemical materials of silver nitrate (>99.9% AgNO3), sodium borohydride (98% NaBH4) and formic acid (70% HCOOH) were purchased from Sigma-Aldrich.
[17] X.Wang, S.Zhang and Z.Zhang, Synthesis of hexagonal nanosized silver sulfide at room temperature, Materials Chemistry and Physics, 107 (2008) 9-12
[30] D.Pencheva, R.Bryaskova, T.Kantardjiev, Polyvinyl alcohol/silver nanoparticles (PVA/AgNps) as a model for testing the biological activity of hybrid materials with included silver nanoparticles, Materials Science and Engineering, 05/2012; 32(7).

Data entry The second box is Materials Handbook containing coefficients for calculating metal deformation resistance (to be discussed in the next chapter) and physical constants for calculating temperature, specific heat and thermal conductivity of the material.
Matuyshenko, The calculation of strips thickness increasing during hot rolling in its length, New Materials and Technologies in Metallurgy and Machinebuilding, Volume 2, 2011, 146-150
Shao, Rolling Force Prediction in Heavy Plate Rolling Based on Uniform Differential Neural Network, Journal of Control Science and Engineering, Volume 2016, 2016, 9 pages
Hirsch, Thermomechanical control in aluminium sheet production, Materials Science Forum, Volume 426-432, Issue 1, 2003, Pages 185-194
Serebryany, Investigation of Texture Structure and Mechanical Properties Evolution during Hot Deformation of 1565 Aluminum Alloy, Materials Science Forum, 2016, volume 854, pp 73-78

Materials and Methods Contact angle measurement.
Chinese Science Bulletin, 2011, 56: 1241–1245
Chinese Science Bulletin, 2010, 55: 1589-1594
Chinese Science Bulletin , 2008,53:2704-2709
Chinese Science Bulletin, 2010, 17: 1744–1746

With the development of science and technology, the ink-jet printing is developing in full swing in the emerging industry.
Fig.7 3D ink-jet 2) System trimming evolution line: The original heating resistance and liquid channel are trimmed; the jet chamber is designed as an internal channel that can store the ink and provide the ink passage; its material is modified that has the deformation (it is similar to the heating resistance).
That is, after the trimming, not only the jet chamber has achieved the triple functions, but also the components are reduced, making the whole product becomes simple. 3) Geometrical evolution line: The ink-jet head can achieve 3D ink-jet effect, as the figure 7 shows. 4) Object segmentation evolution line: With the development of technology, the material will become diversity.
Acknowledgement This study is supported by National Science and Technology Support Program (2012BAF13B05) and Printing Equipment Inspection and Innovation Design Team of Beijing Institute of Graphic Communication (23190112094) and Institute Level Key Projects Funded by Beijing Institute of Graphic Communication (No. 23190112029).
References [1] TAN Run-hua: Innovation design —TRIZ: theory of inventive problem solving(China Machine Press, Beijing 2002) [2] ALTSHULLER G S: Creativity as an exact science: the theory of the solution of inventive problems (Gordon and Breach Science Publishers, Philadelphia 1984) [3] Nikolay Shpakovsky: Evolution tree---Analysis of technical information and generation of new ideas (China Science and Technology Press, Beijing 2006) [4] ZHAO Hao-yu, JIANG Tao, LI Ying-li, ZHAO Ming: Chinese Journal of Engineering Design Vol. 19 (2012), p.75 [5] LIU Yi-xiong: Print Today Vol. 5 (2007), p.36 [6] PU Jia-ling: Print Today Vol. 2 (2005), p.3 [7] SUN Wei-jun: Design and Fabrication of a Thermal Printer Head Based on Carbon Nanotubes (MS, Huazhong University of Science &Technology, China 2009)

After elaboration of matrix materials these was chemical analyzed.
Semi-finished materials obtained were heated in a furnace room.
Popescu, submitted to Advanced Materials Research: 2014
Moldovan, Vacuum Degassing of Aluminium Alloys, Materials Science Forum 217-222 (1996) 147-152
Leonat, Influence of the Mechanical Alloying Parameters on the Elaboration of Sic/Al Nanocomposite Powders, Materials Science Forum 672 (2011) 219-222

In this study, the stress measurement technique of single crystal materials was adopted for the solution of this fundamental problem [2, 3].
Introduction Titanium is one of the most important materials in industrial fields with the advantageous properties such as light weight, corrosion resistance, antibacterial and so on.
Refai MUSLIH, Takao Hanabusa: Ti-2007 Science and Technology, (2007), pp.793-796 [2] A.
[3] Ayumi Shiro, Masayuki Nishida, Tian Jing: Ti-2007 Science and Technology, (2007), pp.247-250
[4] Takao Hanabusa, Masayuki Nishida, Daiki Tadashige: "X-Ray Stress Measurement of Coarse Grained Cast Aluminum", International Journal of Modern Physics B, Inpress

Nowadays, in developed countries such as the occident and Japan, Cu-Ag alloy contact wire materials are usually used to produce contact net wire.
Brief introduction of process on production of Cu-Ag alloy contact wire 1.1 Technical theory Cathode Cu, alloying materials and rare earth of good quality are put into induction electric furnace (addition and melting of materials are in the same pace.
Superfluous oxygen combines Cu to form Cu2O, which decreases tenacity and affects processing capability of materials.
Journal of Dalian Railway Institute , 2003,24(4):63
China Railway Science, 2004,25(6): 99

Stainless steel has been used as the construction material of the impeller blade.
Ishizuka, S.Hayama, Design optimization of axial flow hydraulic turbine runner: Part I – an improved Q3D inverse method, International journal for numerical methods in fluids. 39 (2002) 517–31
El_Gazzar, Effect of motor vibration problem on the power quality of water pumping stations, Water Science. 28:1 (2014) 31-41
Shuai, Vibration analysis of three-screw pumps under pressure loads and rotor contact forces, Journal of Sound and Vibration. 360 (2016) 74-96
Zhao, Vibration analysis of large bulb tubular pump house under pressure pulsations, Water Science and Engineering. 2:1 (2009) 86-94.