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If r1=8mm, r2=8mm, r3=9mm, l=40mm, t=1mm, selecting PZT-4 as material, two curve intersections are calculated through Matlab.
To judge whether the mode1 is radial vibration mode or not, we keep the same material parameters and take the method of control variable to analyze the relationship between resonance frequency and structure size of piezoelectric tube stack.
The 1/20 length mode of piezoelectric tube stack is selected and PZT-4 is selected as material.
Acknowledge This work was supported by the National Natural Science Foundation of China (No.61072004), the Scientific Research Key Program (No.KZ201110772040) and Common Program (No.
References [1] Gonghuan Du, Zhemin Zhu, Xiufen Gong, Acoustic foundation, Nanjing university, Nanjing university press, 2006 [2] Fuxue Zhang, Likun Wang, Modern piezoelectric science, Science press, Beijing, 2002 [3] Guidong Luan, Jinduo Zhang, Renqian Wang, Piezoelectric transducer and transducer array, Beijing University press, 2005 [4] Yiquan Yuan , Limited long piezoelectric thin circular tube diameter, long coupling and emission frequency response, Engineering journal of Nanjing college, 1983 [5] Xiping Mo, The ANSYS software application in the simulation analysis of the acoustic transducer, Acoustic technology, 26 (26), 2007

Journal of High Technology Management Research Vol.21 (2010), p. 23–30
RAND Journal of Economics Vol. 31 (2000), p.674-692
Journal of Empirical Finance Vol.14 (2007), p.150-167
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Science Vol. 298 (2002), p.981–987

The sputtered material condenses at the substrate and forms a thin coating.
DC reactive magnetron sputtering is an efficient method for fabricating thin films of compound materials.
Acknowledgements This work is funded by Hanoi University of Industry through the Science and Technology 2017-2018 program.
Abelson, Journal of Vacuum Science and technology, A 12 (5), 1994, 2846-2854, 52
Hecq, Plasma Sources Science & Technology 7, 1998, 219-229.

Because of concrete materials own characteristics, its determine the nonlinear of inhomogeneity and stress-strain relationship of concrete material composition, in concrete-filled steel tube, if you can provide enough binding for the core concrete-filled steel tube, with the increase of deformation, stress-strain curve of concrete will not decline; Conversely, if you cannot provide enough binding for the core concrete-filled steel tube, stress-strain curve of concrete will decline.
Acknowledgements National Science Foundation References [1] Gu Fubin.
Discussion wind generators with structure of concrete tower forms.Xinjiang agricultural university journal [J]. 2009, (3): 82-85
Inner Mongolia University of science and technology 2011
[5] Han Linhai.Concrete-filled steel tube structure [M].Beijing Science Press. 2001.64-74.

Acknowledgements This work was financially supported by National Natural Science Foundation of China(20806035), Back-up Personnel Foundation of Academic and Technology Leaders of Yunnan Province(2009CI026), Opening Project of Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences(61920090077), and Training Foundation for Talents of KMUST(14118194).
Zhitomirsky: Materials Letters Vol.58 (2004), p.420-424
Chen:Journal of Jiangsu University (Nature Science) Vol.23 (2002), p.52-56
Aust,et al: Materials Letters Vol.52 (2002), p. 85-90
Balasubramaniam: Corrosion Science Vol.46 (2004), p.3019-3029

A modified Arcan fixture, well-suited for the study of the behavior of used composite assemblies, was developed in order to focus on the analysis of the fracture behavior of the material.
Many defects, resulting from the fabrication process or other natural fact such as corrosion, are often the cause of initial cracks in materials [1].
This specimen was used in order to study the mixed-mode Interlaminar fracture toughness of twill PAN Based Carbon/Epoxy composite material.
Nikbakht: Journal of Mechanical, Industrial and Aerospace Engineering 2:4 2008
Hosseini: Materials Science and Engineering A 516 (2009) 162–168 [7] N.

Recently, the necessity to grade grain size to ultrafine and nano scale for understanding the mechanical behavior of these materials has been recognized.
Obviously, the character and amount of grain boundaries must also be considered when deformation mechanisms of polycrystalline materials are analyzed.
Courtney: Mechanical Behavior of Materials (McGraw Hill, Boston-Toronto 2000)
Li: Journal of Materials Science & Technology (Shenyang, China) Vol. 18 (2002), p. 108 [43] S.
Armstrong, in: Advances in Materials Research, edited by R.F.

Inbound logistics (1) Inbound material flow distribution: According to production characteristics of the customer, the distribution centers meet the demand for materials in the production site, design distribution line and equipment, and actually implement the distribution work, to directly meet materials supply requirements of production jobs; (2) In-process inventory management: Distribution centers use the necessary monitoring and management tools, such as bar code and RFID to track and manage in-process inventory in the workshop, to in time reflect the status and number of in-process inventory, and to avoid time lag caused by computing in-process products and material consumption in the finished product storage recoil mode rigidly; (3) Packaging operations management: In the production site distribution process, changing some suppliers’ materials packaging and formation of the standard packaging feeding forms under the lean production mode, is not only conducive to the production
Usually, you can use the appropriate logo, bar code, information systems and location rules to reach this goal; (5) Inventory breakpoints management: If distribution centers join in material inventory management process, they need to act in concert with the customer's inventory breakpoints management processes.
When customers change their engineering, distribution centers accurately monitor the old materials and new materials inventory status, and ensure that old materials will not be out of stock before the switching point and that the new material can be accurately enabled when the switching point comes.
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On the Development of Viable Cruciform-Shaped Specimens: Towards Accurate Elevated Temperature Biaxial Testing of Lightweight Materials Fadi Abu-Farha1, a, Lou Hector, Jr.2,b and Mohammed Nazzal3,c 1 Department of Mechanical Engineering, Penn State Erie, Erie, PA 16510, USA 2 GM R&D Center, General Motors Corporation, Warren, MI 40890, USA 3 School of Technological Sciences, German Jordanian University, Amman, Jordan a fka10@psu.edu, blouis.hector@gm.com, cmohammad.nazzal@gju.edu.jo Keywords: Biaxial Testing, Cruciform Specimens, Digital Image Correlation, Strain Contour Maps.
The ultimate result would be failure along the dominant one; an issue mostly associated with the texture of the material.
The next stage of testing will target materials where texture may play a minor role, such as the AZ31B-O magnesium and AA5083 aluminium alloys, in order to further explore the potentials of those geometries.
Bariani: Key Engineering Materials, Vol. 344 (2007), p. 97 [7] D.
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BCB is one of the organic bonding materials, which is used in MEMS packaging.
Stress induced by packaging is mainly caused by thermal expansion coefficient (TEC) mismatches among the component materials making up the package, which is usually inevitable[4].
The bonding process is accomplished in a simple way; BCB is used as a material for constructing the structure layer as well as the crosslink layer.
It was found that the most important factors for hermetic bonding are pre-bake time, spun speed and pressure placed on the wafer, and stress isolation used for isolating TEC mismatches among the component materials making up the package can reduce a factor of 10 compared with that of the sensors without stress isolation.
Burghartz, Area-Selective Adhesive Bonding Using Photosensitive BCB for WL CSP Applications , Journal of Electronic Packaging, Vol. 127,2005,pp.7-11