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So we design a reference capacitor with the same geometry and the same material as the sampling capacitor, and it is pumped into a vacuum.
The design specification of measurement precision of instrument is 1N, then temperature coefficients of sampling capacitor are required to be less than 2×10-6, so the materials with low temperature coefficients must be used.
Because the instrument is carried by sounding balloons, it must be light weight, the materials must be lightweight materials, and selecting R1, R2 should take into account that air medium flowing through the sampling capacitor within the speed range needs keeping the on-chip flow state, not becoming turbulent.
[4] Zhang Yu, Yang Fu lin , Wu Xi de,and Gao Xia:The limitation of type 59 radiosonde on accuracy of refraction correction, Chinese Journal of Radio Science, vol.16(2001),p.404-408
[6] Zhang Yu, Yang Fu lin , Wu Xi de,and Gao Xia:The limitation of type 59 radiosonde on accuracy of refraction correction, Chinese Journal of Radio Science, vol.16(2001),p.404-408

Oxygen Evolution Kinetic Parameters of Electrodeposited Composite Inert Electrodes Ruidong Xu 1, a , Junli Wang2,b and Zhongcheng Guo 1,c 1 Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, P.R China 2 Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming, 650093, P.R China a rdxupaper@yahoo.com.cn, bwangjunli78@yahoo.com.cn, cguozhch@vip.163.com Keywords: Inert electrodes,Polarization curve of anode,Kinetic parameters of oxygen evolution.
Introduction In the course of hydrometallurgy, the direction and kinetics of electrode process, the structure patterns of the electrode and electrolytic bath and the lifetime of electrolytic bath, etc. depend on the performance of electrode materials to a great extent, so the choice of the electrode materials is particularly important.
Pb/WC-ZrO2 inert electrodes 1.Pb/1.86%ZrO2; 2.Pb/6.08%WC-2.26%ZrO2; 3.Pb/8.54%WC-3.54%ZrO2;4.Pb/9.85%WC-3.62%ZrO2; 5.Pb/10.02%WC-3.58%ZrO2;6.Pb/10.09WC-3.50%ZrO2 Table 1 Kinetic parameters of oxygen evolution of Pb/WC-ZrO2 inert electrodes Inert electrode types Tafel intercept a (mV) Tafel slope b(mV) Exchange current densityi 0(A·cm -2) η(mV) Pb/1.86%ZrO2 829 118 9.43×10-8 1030 Pb/6.08%WC-2.26%ZrO2 877 100 1.70×10-9 1047 Pb/8.54%WC-3.54%ZrO2 830 138 9.67×10-7 1067 Pb/9.85%WC-3.62%ZrO2 835 95 1.62×10-9 997 Pb/10.02%WC-3.58%ZrO2 771 140 3.11×10-6 1009 Pb/10.09WC-3.50%ZrO2 856 121 8.43×10-8 1062 Note: η is the overpotential of oxygen evolution of inert electrodes teased at 50mA/cm 2 of current density The value of Tafel intercept, a, of Pb/6.08%WC-2.26%ZrO2 and Pb/10.09WC-3.50%ZrO2 was higher, and the value of the exchange current density,i0, is lower, it will make anodic overpotential of oxygen evolution be higher if two kinds of materials
are used as anode material, resulting in higher voltage of electrolytic bath and energy consumption.
Mahe:Journal of Electroanalytieal Chemistry Vol.573(2004),p.227 [3] Z.G.Miao and Z.C.Guo.Eletroplating and Finishing Vol.26(2007), p.15 [4] Y.H.Song, G.Wei and R.C.Xiong:Electrochimica Acta Vol.52(2007),p.7022 [5] L.C.Wang, X.L.Li，J.H.Zhao, C.Y.Song and H.S.Xu:Chemical Research andApplication Vol.19(2007),p.172 [6] J.T.Kong, S.Y.Shi and L.C.Kong: Electrochimica Acta Vol.53(2007),p.2048 [7] J.Y.Wang and X.E.Hu:The Chinese Journal of Process EngineeringVol.3(2003),p.540 [8] B.M.Chen, Z.C.Guo and X.W.Yang: China Nonferrous Metallurgy (2009),p.54 [9] B.M.Chen, Z.C.Guo, J.J.Yao and N.Tan: Plating & Finishing Vol.30(2008),p.8 [10] X.Z.Shi, Z.C.Guo, B.M.Chen and N.Tan: Electroplating ＆ Finishing Vol.28(2009),p.9

The X-ray Powder Diffraction Patterns and Crystal Structure for Al2M3Y(M=Cu, Ni) Degui Li1, a, Ming Qin1, b, Liuqing Liang1, c, Zhao Lu1, d, Shuhui Liu1, e, Bing He1, f, Peilin Qing1, g, Lingmin Zeng2, h 1Department of Physics and Communication Engineering, Baise University, Baise, Guangxi 533000, China 2College of Materials Science and Engineering, Guangxi University, Nanning, Guangxi 530004, China alidegui354@163.com, bqm6327@sohu.com, c114560196@qq.com, d360933256@qq.com, ewert887@126.com, fbsxyhb@21cn.com, gplqing110@163.com, hlmzeng@gxu.edu.cn Keywords: Al2Cu3Y; Al2Ni3Y; X-ray powder diffraction pattern Abstract.
Introduction The alloy system of Aluminum - transition - rare earth has been a hot field of materials research due to its excellent microstructure, mechanical, electrical and corrosion resistance performance.
The sample of Al2M3Y was melted with the stoichiometric amounts of elemental constituents (99.99 wt % Al, 99.99 wt % Cu, 99.99 wt% Ni and 99.9 wt % Y by China new metal materials technology Co., Ltd.) under high purity argon atmosphere in vacuum arc furnace, that have a tungsten electrode and a water-cooled copper tray.
[4] Rykhal' R M, Zarechnyuk O S and Pyshchik A V: Journal of the Less-Common Metals Vol. 16 (1968), p. 285-287
[5] Shin Dongwon, Golumbfskie W J, Ryba E R and Liu Zikui: Journal of Alloys Compd.

Although the majority of fiber reinforced resins contain glass fibers, the attractive properties of carbon fibers have made them a material of choice in various applications [4].
Since nowadays, carbon fiber thermoplastic composites are widely used in various applications, it is essential to know about the thermal properties of these materials.
Experimental Materials PTFE powder with a grit size about 65.0 μm was used as matrix resin of CF/PTFE composite.
Shanghai Municipal Natural Science Foundation：11ZR1413600.
Yavich, A new technique for measuring the temporal characteristics of the carbon fibre microelectrodes in in vivo voltammetry at millisecond time intervals, Journal of Neuroscience Methods, Volume 84, Issues 1-2, 1 October 1998, Pages 29-32 [9] P.

Introduction Wool is one of the upscale textile materials, enriched with the excellent performances such as elasticity, soft hand and heat retention, etc.
Experimental Experimental materials and instrument.
Journal of guangxi textile science and technology.01 (2002)46-48
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Journal of textile. 02(2012)85-88

In the case of the ‘‘green’’ composites, natural fibers derived from bamboo [1], hemp [2], or flax [3] are added to biodegradable resins to reinforce polymer matrix materials and improve the mechanical properties of the resultant composites.
The tensile fracture surface was coated with conductor material to allow electrons to flow through the specimen.
Part 2; Thermal Degradation And Materials Properties, Prog React Kinet Mech, vol 34, pp 1-43 2009. 1468-6783@2009 Science Reviews 2000 Ltd [7] Anika Zafiah M.
Rus, Effect of Titanium Dioxide on Material Properties for Renewable Rapeseed and Sunflower Polyurethane, International Journal of Integrated Engineering (Issues on Mechanical, Materials and Manufacturing Engineering), Volume 1, No 1, April 2009: ISSN:1985-854X [8] Anika Zafiah M.
Composites: Part A 39 (2008) 685–689 [11] Lubarda, V.A., Elastic plasticity Theory, United State, Pp 245-247 (2001) [12] Smith, W.F., Hashemi, J., Foundations of Materials Science and engineering, Mc Graw Hill.

Material Preparation The black liquor from R.
Egyptian Journal of Petroleum
[Journal].
Journal of Engineering Science,, Vol. 9, 39–49
Journal of Materials Research and Technology, Vol 4(1), pp 26-32

Some houses had too high story height, which increased the heat loss in winter and wasted the materials, and the unreasonable energy structure, less use of clean energy and so on.
The reasons of poor indoor thermal environment In the medium of 1980, although the local villagers generally realized that the thermal insulation property of raw earth wall was far superior to that of brick wall, but the materials of wall of local houses changed from raw earth to solid clay brick with the rapidly development of building construction technology and new building materials along with the increasing of economical level and transforming Philosophy.The exterior brick wall didn’t take any heat insulation measures instead of bare brick wall, without finish materials protection, it is possible to increase the cold air infiltration and wall heat transfer in winter.
Acknowledgements The work was supported by National Natural Science Foundation of China (Project No. 50978210 and 50921005) and Education Department of Henan Province Natural Science Research Project (Project No. 2010B560007 and 072102360036).
Journal of Xi′an University of Architecture & Technology(Natural Science Edition), 2009, (12)：841-845 (in Chinese) [2] Wenfang He, Liu Yang, Jiaping Liu, et al.
Architectural Journal AJ academic article issue. 2009,24-26 (in Chinese) [3] Jie Yan.Sishuan building science, 2009, 35(4)：140-144 (in Chinese) [4] Wei Zhou.Xi’an: Xi’an University of Architecture and Technology,2004 (in Chinese) [5] The People’s Republic of China.

However, the distinctive properties of the fluid depend on the concentration of nano material besides its designation also needs to be reviewed.
All of the materials tested showed a similar diffraction pattern which has the highest peak in the 2θ = 35.7-36.2° indicating the typical peak of ZnO with space group P63mc (186) and JC-PDF no. 36-1451.
Mehta, The most efficient waste heat recovery device: A gamma type stirling engine, International Journal of Advanced Engineering Technology. 3 (2012) 189-195
Asare, Thermal properties of gros michel banana grown in Ghana, Engineering and Applied Sciences. 7 (2012) 478-484
Bonomo, Thermophysical properties of umbu pulp, Brazilian Journal of Food Technology. 13 (2010) 219-225.

The design of this type of structures requires setting up the complex modelling the mechanical behavior due to specificities of these materials.
This work is a contribution to the analysis of the thin composite materials laminated plates by using the finite element method.
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