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The velocity of propagation in most of the materials from which FBARs are currently fabricated exhibit a negative temperature coefficient because the inter-atomic forces weaken with increasing temperature.
Consequently, the relationship between series resonant frequency fs and elastic coefficient c is (2) For most materials, such as AlN and ZnO, inter-atomic forces decreases as temperature increases, resulting in a decrease in the elastic coefficient and series resonant frequency of material.
Acknowledgment This work is funded by the open project fund of the Key Laboratory of Ultra-precision Machining Technology, China Academy of Engineering Physics (Project No. 2012CJMZZ00009), the visiting scholar fund of the National Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University (Project No. 2013MS04), the open project fund of the Key Laboratory of the Ministry of Education of Manufacturing Process and Test Technology, Southwest University of Science and Technology (Project No. 11ZXZK03), and the Graduate Innovation Fund of Southwest University of Science and Technology (Project No. 13ycjj31 and 13ycjj36).
Correspondence and requests for materials should be addressed to Gao Yang.
[8] Zhijian Yin, Tianjiao Shao, and Bin Wen, “Thermal expansion coefficient and high temperature elastic constants of AlN from first principles calculations,” Journal of Yanshan University, vol. 37, pp. 27–33,Jan. 2013

Eliseev1,d 1Institute of Strength Physics and Materials Science, Siberian Branch of Russian Academy of Sciences, pr.
They also have potential for making some specific materials as for example those reinforced by carbon fiber, glass fibers, and graphene [5-7].
Such a process can be applied for making composite components of any desired shape from practically any plastics and reinforcing materials.
Materials and methods The subject of investigation is a three-component composite combining two sorts of binding, namely, thermoplastics and thermosetting polymer which has been obtained using a 3D-printing process developed at Skolkovo Institute of Science and Technology.
This type of fracturing is typical for maximum strength samples as well as for many other composite materials mechanically loaded along the fiber axis.

Cheong: Journal of Computer-Aided Design, Vol. 35 (2003) No.12, pp.1069-1083
Hong: Journal of CNC International Journal of Computer Integrated Manufacturing, Vol. 15 (2002) No.2, pp.168-177
Newmanl: Journal of International Journal of Production Research, Vol. 43 (2005) No.4, pp.655-670
Sun: Journal of Shenyang Jianzhu University of Natural Science, Vol. 22 (2006) No.5, pp.872-875.
Zhang: Journal of China Mechanical Engineering, Vol. 15 (2004) No.4, pp.325-329.

Reasonable blank shape not only can reduce materials, reduce or even discharged subsequent deburring process and reduce the production cost, but also can improve the forming process of the material in strain distribution, and improve product quality, etc.
During deep drawing process, the materials of long side do not flow inward, so can ignore the blank optimization.
Acknowledgements This work was financially supported by the science and technology bureau of Guangzhou city (Project Code: 20080018).
[3] WANG Xue-gang,SHI Wei, “Blank design based on the Inverse finite element method,” ［J］,Journal of plasticity engineering, No.3, Vol. 11, Jun, 2004
Optimum blank shape design by sensitivity analysis［J］.Materials Processing Technology, 2000(104):191~199

In summary, many studies have focused on the PF adhesive from bio-oil derived from the soft wood, bark and other raw materials.
Experimental Materials and Methods Materials.
The BPF adhesive was prepared with overall BPF resin: flour mass ratio of 10:1 and the materials were mixed.
Chang: The Journal of Adhesion, Vol. 86: 8(2010), p. 834-843
Kelly: Proceedings of the 31th International Particleboard/ Composite Materials Symposium.

In this method, however, dosage of raw materials does not stoichiometrically correspond to ettringite but to monosulfate [12].
Assuming purity of original raw materials, Al2(SO4)3·18H2O = 99,9 %, Ca(OH)2 = 98,6 %, dosage amounted 59.04 % Al2(SO4)3·18H2O + 40.96 % Ca(OH)2.
The raw materials were weighed after drying at laboratory scale with an acccuracy of ± 0.01 g, total batch mass was 200 g.
Before hydration, the raw materials were homogenized in a p laboratory lanetary mill FRITSCH Pulverisette 6 at a speed of 200 rpm for 60 seconds.
Cement and Concrete Science and Technology.

Experimental Materials.
If there were few raw materials in the system, the volume of production couldn’t meet practical demands.
Flue gas desulfurization gypsum and coal fly ash as basic components of prefabricated building materials[J].
Construction and Building Materials, 2007, 21(7): 1500-1509
Chemical Engineering Journal, 2011, 174(1): 296-303

Environmental inspection culture is about concept of value, system and standards, behavior patterns and corresponding material representation that formed in long-term working of environmental inspection.
Lu: Environmental Inspection (China Environmental Science Press, Beijing, P.
Proceedings of Zhejiang Zhongxinbu Science Forum (2006), p. 417-421 (In Chinese)
He: Discussion on Environmental Law Enforcement in China, Chinese Journal of Population Resources and Environment Vol.20 (2010), p. 146-150 (In Chinese)
Lei: The Definition, Value, and Realization of Green Administration, Journal of Jianghan University(Social Sciences) Vol.22 (2005), p. 10-13 (In Chinese).

JOURNAL OF SICHUAN UNIVERSITY (ENGINEERING SCIENCE EDITION), 2008, 40(5):107-111(in Chinese)
Fire Science and Technology, 2005, 24(3):283-287(in Chinese)
China Safety Science Journa,2003,13(12):63-67(in Chinese)
China Safety Science Journa, 2006, 16(2):39-42(in Chinese)
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY, 2007,29(6):69-72(in Chinese).

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