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The mechanical property of RC box girder strengthened with carbon fiber sheets is complicated because the strengthened girder is a composite structure made up of many different materials such as concrete, steel bars and carbon fiber sheets.
In the process from the very beginning of loading to the ultimate damage, these materials’ nonlinearities appear simultaneously, which results in complicated structure’s mechanical property and deformational law in different stress phases.
If all kinds of materials are pasted so intactly that there will be no relative slip among these materials, that is to say, steel bar (or carbon fiber sheet) element and concrete element share the same node, the displacement coordination and the force transmission among these materials can be guaranteed.
Yim et al:Journal of Bridge Engineering, 2006, 11(1):21-32 [5] Liu Xiaoyan，Wang Liangbo et al:World Bridges, 2004(2): 59-61(In Chinese) [6] Hu Kongguo, Yue Qingrui et al: Journal of Building Structures, 2000, 30(7): 44-48(In Chinese) [7] Liu Xiaoyan, Yan Donghuang et al: China Journal of Highway and Transport, 2006, 19(1):58-61(In Chinese) [8] Wei Chenglong:Analysis of the Ultimate Load for Long Span Cable-Stayed Bridge with a Plate-Truss Composite Beam.
Xi’an: Shaanxi Science and Technology Press, 1994(In Chinese)

Finally, between the conductive fabric layers is placed a layer of special insulating material.
In this study, it was not verified the validity and the repeatability of the measurements along the time that could be affected by alteration in the property of the polymeric materials that compose the mat.
European Journal of Applied Physiology and Occupational Physiology, Berlin, v. 50, n. 2, pages 273-282, (1983) [2] Buckthorpe M, Morris J, Folland JP, Validity of vertical jump measurement devices, Journal of Sports Sciences, Volume 30, Issue 1, pages 63-69, (2012) [3] Laurent B, Berryman N and Dupuy O, A comparison of 2 optical timing systems designed to measure flight time and contact time during jumping and hopping, Journal of Strength & Conditioning Research, Volume 23 – Issue 9, pages 2660-2665, (2009)
[6] Harman EA, Rosenstein MT, Frykman PN, Rosenstein RM and Kraemer WJ, Estimation of Human Power Output From Vertical Jump, Journal of Applied Sport Science Research, Volume 5 - Issue 3, pages 116-120, (1991)
[7] Aragón-Vargas LF, Evaluation of four vertical jump tests: methodology, reliability, validity, and accuracy, Journal on Measurement in Physical Education and Exercise Science Vol. 4 No. 4 pp. 215-228, (2000) [8] Markovic G, Dizdar D, Jukic I, Cardinale M, Reliability and factorial validity of squat and countermovement jump tests, Journal of Strength & Conditioning Research, Volume 18 - Issue 3, pages 551-555, (2004)

Oladijo3 1Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, P.M.B.
The molten materials were taken in a crucible and transferred to another crucible in the separate stirring arrangement.
International Conference on Recent Advancement in Mechanical Engineering &Technology (ICRAMET’ 15): Journal of Chemical and Pharmaceutical Sciences ISSN: 0974- 2115. (2015)
International Journal of Electrochemical Science, 8:5515 – 55. (2013)
International Journal of Engineering Science Invention ISSN (Online): 2319 – 6734, www.ijesi.org, Volume 6 Issue 10, PP. 12-19. (2017).

Mechanics of elastic performance of texile materials, Part Ⅴ: Aa study of the factors affecting the drape of fabrics -The development of a drape meter.Textile Res, 1950(08)
[11] ZHANG Yu, Research of silk shape style –The generated, testing and evaluation of silk dress material shape style information [J].Journal of Soochow University (Natural Science Edition), 1990, 1: 003
Journal of Donghua University (Natural Science Edition), 2004, 10
International Journal of Clothing Science and Technology, 1995, 7(5): 10-25
Journal of Northwest Institute of Textile Science and Technology, 2001, 15(2): 122-125

Watanabe, Microstructure and mechanical properties of Cu–Ni–Si alloys [J], Materials Science and Engineering A. 483-484 (2008) 117-119
Vincent, Dynamic embrittlement at intermediate temperature in a Cu–Ni–Si alloy [J], Materials Science and Engineering A. 477 (2008) 145-152
Albert, Precipitation processes in Cu-Co-Si alloys [J], Journal of Materials Science. 23 (1988) 4059-4065
Jin, Aging behavior of Cu–Ni–Si alloy, Materials Science and Engineering A. 361 (2003) 93-99
Noble, Precipitate structure in a Cu-Ni-Si alloy, Journal of Materials Science. 29 (1994) 218-226

All materials are mixed homogeneously in a porcelain crucible, covered with aluminum foil which is then stored in a desiccator (vacuum air) which aims to reduce water vapor in the material before being put into the furnace for the melting process.
Journal of Materials Science: Materials in Electronics, 30(1), 677–686. https://doi.org/10.1007/s10854-018-0336-y [11] Venkateswara Rao, B.
Optical Materials, 88(November 2018), 429–444. https://doi.org/10.1016/j.optmat.2018.11.059 [13] Prabhu, N.
Optical Materials, 125, 112007. https://doi.org/10.1016/j.optmat.2022.112007 [22] Shanmuga Sundari, S., Marimuthu, K., Sivraman, M., & Babu, S.
Electronic Materials Letters, 6(3), 103–106. https://doi.org/10.3365/eml.2010.09.103

Introduction Alloy materials are one of new functional material and structural material intermetallic compound in the 21st Century.
Alloy materials have recently attracted lots of attention due to their excellent application properties.
Development of new binary alloy materials became a new research focus in materials science [3,4].
Compared with other Alloy materials, Fe-Al alloys, Ti-Al alloys and Ni-Al alloys are widely use alloy materials, we choose Ni-Al alloys to research.
Journal of Molecular Graphics, 1996,14(1): 33−38

Arof, Dielectric properties and morphology of polymer electrolyte based on poly(ɛ-caprolactone) and ammonium thiocyanate, Materials Chemistry and Physics, 134 (2012) 755-761
Chai, Conductivity, dielectric behavior and FTIR studies of high molecular weight poly(vinylchloride)–lithium triflate polymer electrolytes, Materials Science and Engineering: B, 139 (2007) 240-245
Kadir, Proton conducting polymer electrolyte based on plasticized chitosan–PEO blend and application in electrochemical devices, Optical Materials, 35 (2013) 1834-1841
Isa, Structural and electrical properties of carboxy methylcellulose- dodecyltrimethyl ammonium bromide-based biopolymer electrolytes system, International Journal of Polymeric Materials, 61 (2012) 30-40
Isa, Structural and ionic transport study on CMC doped NH4Br: A new types of Biopolymer Electrolytes, Journal of Applied Sciences, 12 (2012) 174-179

Synthesis of 7-hydroxy -4- methyl coumarin with Microwave radiation catalyzed by Zirconium sulfate tetrahydrate Shujing Liua, Yunpeng Lib, Xiumin Yangc, Qingmei Jiangd College of science, Agriculture University of Hebei,Baoding,071000,China aliushujing66@126.com, bliyunpeng@163.com, c yangxiumin@163.com,jiangqingmei@126.com Key words:7-hydroxy-4-methyl coumarin; microwave irradiation; Zirconium sulfate tetrahydrate Abstract:The 1,3-benzenediol and ethyl acetoacetate as raw materials were used to synthesize 7-hydroxy-4-methyl coumarin under microwave irradiation with Zirconium sulfate tetrahydrate as the catalyst.
In this paper, the 1,3-benzenediol and ethyl acetoacetate as raw materials Zr(SO4)2·4H2O as catalyst by microwave radiation technology,were used to synthesize 7-hydroxy-4-methyl coumarin.
The reaction principle is as follows: Experimental Section Materials.
Acknowledgements This work was financially supported by the Science and Technology Research and Development Foundation of BaoDing（12ZF023） References
;El-Nawawy MA.; Journal of the Indian Chemical Society, 1998,75(6):377-378 [8]Bear I J, Mumme W G, 1969,B25:1558-1561

Influence of Nd Doping on the Magnetic Properties of Nd2Fe14B/α-Fe Nanocomposite Magnets Xiao-dong Fana, Na Tianb, Cai-yin Youc School of Materials Science and Engineering, Xi’an University of Technology, Shaanxi Xi’an 710048, China a fanxiaodong@stu.xaut.edu.cn, b tianna@xaut.edu.cn, c caiyinyou@xaut.edu.cn Keywords: Nd2Fe14B/α-Fe nanocomposite magnets, Mechanically ball milling, Interface tuning, Maximum magnetic energy product Abstract.
Nominal composition alloy (Nd, Pr)11.1Fe81.6Zr1.4B5.9 powders (NdFeB for short), high purity Fe and rare earth Nd powders were used as the starting materials in preparing the nanocomposite magnets.
Zhang: Journal of Magnetism and Magnetic Materials, Vol. 324 (2012) No.19, p.2953 [4] Z.Y.
Xie: Materials Science Forum, Vols 475-479 (2005), p.2165 [5] M.
Hono: Advanced Materials, Vol. 24 (2012) No.48, p.6530 [14] Z.S.