Search results

Acknowledgements This work was financially supported by the projects of Hubei Science and Technology Plans of China (Granted No: 2013BAA009).
References [1] Yong Zhou, Pengtao Sun and Peng Guan: Journal of Zhengzhou University, vol. 28 (2007), p. 114(In Chinese)
[4] Haiping Lin, Jing Chen, Siyu Huang, Youxin Yuan: Lecture Notes in Electrical Engineering, vol. 238 (2014), p. 859 [5] YanLing Liang, Jing Chen, Kun Yang, You Xin Yuan: Applied Mechanics and Materials, vol. 483 (2014), p. 262

Introduction The photonic crystal is a dielectric material or a metal cycle arrayed structure, the structure of the surface acoustic wave at a certain frequency range showing a frequency band gap, and Application of the effect of the forbidden band of the photonic crystal, the propagation of the surface wave in the antenna baseis inhibited, the dielectric substrate can be greatly reflection of energy in the antenna base, it has a lower return loss and high gain.
Antenna Design Design of Photonic Crystals This selection of a dielectric material for Rogers R03210 (εr = 10.2), the thickness of the medium is h = 1.59mm, the photonic crystal structure was circular dot distribution holes, holes having a diameter of D = 2mm.
SHAN Jiang-dong, Design of a rectangular patch antenna with a photonic crystal substrate, The Journal of China Universities of Posts and Telecommunications, 2011
Superconductor Science & Technology.2005,18(10):1342-1347 [7] Y.

Based on the one-dimensional vibration theory—the diameter is far larger than the thickness—only the longitudinal-vibration is take into account, the vibrating of a radial-contour disk is described as Eq. 2, [3], (2) where, is the displacement at radial, , this is the propagation velocity of the longitudinal-vibration, is the Young’s modulus, is density of the material and is the Possion ratio.
Then output current is expressed as: (8) Electrostatic driving force at the excitation frequency is: (9) Submitting (8), (9) ,,and into (1) and have an analog equation (10), (10) The electronic parameters shown as follows: ；； (11) The model of a disk resonator is shown as figure 1: Fig.1 Two port electrical equivalent circuit Simulation and analysis The resonator of the model is crystal silicon, the material parameter of the resonator as follows: Young’s modulus 170Gpa, density 2330kg/m3, Poisson’s ratio 0.278; The radius of the disk is 20um and
Vibrating RF MEMS for next generation wireless applications[C]// IEEE Custom Integrated Circuits,2004,257-264 [2] Y.S.Nada, S.Stoffels, H.A.C.Tilmans,et al.Circular MEM Resonator: Modeling Second Order Effects on Resonance Frequency[C]//IEEE Mechanical and Multiphysics Simulation and Experiments in Micro-Electronics and Micro-System, EuroSimE 2008,1-4 [3] Lin Shu-yu, Radial vibration and equivalent circuit of thin elastic circular plates[C] Journal of Shaanxi Normal University (Natural Science Edition),2001(12),31-35 [4] Ville Kaajakari, Jukka K.

Fig.1 The XRD of fly ash The modifying methods of fly ash The metal oxides with high polymerization exist in vitreous and mullite, its internal structure of high polymerization degree determine that it is difficult to be destroyed completely at room temperature and pressure, thus hard to improve the extraction efficiency of valuable materials.
Acknowledgements This work was financially supported by the National Scientific Foundation China (NSFC51178207), Shandong Provincial National Science Foundation (ZR2011EEM003).
Journal of Tianjin Institute of Light Industry, 2003,18(3)

Thermal- Field Experimental Study of a Thin Circular Carbon-Fiber Tube in Stratosphere Environment Fenbo Pei 1, a,Guoquan Tao1,b , Zhe Wu1,c 1 School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China apeifenbo@163.com, bac97531@163.com, cwuzhe@china.com Keywords: Stratospheric Aerostat; Stratosphere Condition; Heat Conduction; Heat Convection; Radiant Heat Transfer; Thermal Analysis Abstract.
In altitude of 20km, temperature fluctuates around -56.5℃.Working in a low temperature, materials become very brittle.
Journal of Astronautics,2007 ,28(3):603-607.

The first is by introducing new advance materials such as polymer composite material [1] (currently being used in F1 racing cars) and the second is maintaining existing material, but exploring new designs by means of shape and size optimization.
In this study, existing materials such as mild steel used for the development of crush absorbers is used.
The material of the tube is mild steel whose density is 7800 kg/m3, with a Poison’s ratio of 0.3 and Young’s Modulus of 207 GPa.
Thambiratnam: International Journal of Mechanical Sciences Vol. 46 (2004), p 201 – 216

Introduction Earth, as a traditional building material, has long time history in China.
Whilst most forms of earth building have excellent green credentials, human friendly earth wall buildings, good thermal, acoustic and other properties, it is cost effectiveness compared to other industrial building materials.
To reduce material and specimen variation, both specimens were made using consistent raw materials, curing conditions and local construction practices.
Acknowledgements The test is funded by National Natural Science Foundation of China( Project ID: 50708087).
“Similarity technique for dynamic structural model test.”Journal of Dalian University of Technology., 40, 1-8

Mashayekhi: Utilization of Wind Power as a Renewable Energy in Asbads, Case of Iran, Sistan” Advanced Materials Research Vols. 433-440.
Moradchelleh: Problems and Tendencies of the Development of the Architectural Sciences: Culture Research Aspect.
Middle-East Journal of Scientific Research 10 (2011), p. 678 [3] P.
Doroodgar: Modeling of LSF Technology in Building Design & Construction Case-study: Parand Residential Complex, Iran, Advanced Materials Research Vols. 341-342.
Khaksar: The Strategies of Outspreading Smart Materials in Building Construction Industry in Developing Countries; Case Study: Iran, 2011 International Conference on Intelligent Building and Management.

ZnO is a II-VI semiconductor material.
To obtain ZnO nanostructures efficiently, a commercial microwave oven for fast heating of the material was used.
Materials and Methods: ZnO nanowires were grown hydrothermally on glass substrates based on the method developed by Husnu et al. [13].
C. look, Materials Science and Engineering B 80, 383 (2001)
Mao, Journal of Crystal Growth 265, 482-486 (2004)

For hexaaluminates is a kind of catalytic materials with high thermal stability, this material may be more suitable for high temperature de composition with high concentration of N2O[11].
The final sample material was used to characterize by XRD, BET and N2O decomposition reaction.
The BET surface area of the hexaaluminate materials which had been calcined at 1200 ℃ for 5h is summarized in Table 1.
Applied Clay Science, Vol.13(1998), p.347
Journal of Molecular Catalysis A: Chemical, Vol.248 (2006), p.210