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Finally, by conducting accelerated degradation of the key components and materials, the life conclusions of them were estimated.
Combining the storage life information of missiles, board-level circuits, components and materials, a complete set of overall solution of the life prediction and life extension of missile was proposed.
Combining the storage life information of the missile, subsystem, board-level circuits and raw material, this method can evaluate the missile storage life comprehensively and provide support for the life prediction and life extension of missile.
Acknowledgments This work is supported by the Guangdong Provincial Key Laboratory of Electronic Information Products Reliability Technology, Guangzhou Key Laboratory of Electronic Information Products Reliability and Environmental Engineering (Sui Ke Xin Zi[2013]163-17), and the Important National Science and Technology Specific Projects of China (No. 2012ZX04001-21-06).
Chinese Journal of Applied Probability and Statistics, Vol. 01 (1995), p. 82-87.

In recent years, in order to solve the shortage of raw materials, they buy a certain quantity of cold matte, miscellaneous copper as supplement, so that the structure of raw materials is more complex, in addition, the production and organization has become an complex activity because of using Isa smelting which have characteristics of fast production and high load[1] .
Making accurate prediction of production is needed urgently to the variety possibilities occurred in production and a complex material construction.
References: [1] Zhu Zuze, He Jiaqi, Modern copper metallurgy .Beijing, Science press.2003 [2]M.Nagamori and P.J.Mackey.
China nonferrous metal journal. 1996, 6 (4):21-28 [4] Goto S.
Shanghai science press. 1990 [6]Xiao Xingguo, Xie Yunguo, Bases of metallurgical reaction in engineering science.

Rectangular samples (with dimensions 30 mm×15 mm×3 mm) of Magnesium alloy AZ91 (Al 8.8 %, Zn 0.81 %, Mn 0.21 %, Mg rest) were used as substrate material.
References [1] Baril G, Pebere N, Corrosion Science Vol. 43(2001), p. 471 [2] Inoue H, Sugahara K, Yamamoto A, Corrosion Science Vol. 44(2002), p. 603 [3] Mathieu S, Rapin C, Steinmetz J, Corrosion Science Vol. 45(2003), p. 2741 [4] Zidoune M, Grosjean M H, Roue L, Corrosion Science Vol. 46(2004), p. 3041 [5] Altun H, Sen S, Materials and Design Vol. 25(2004), p. 637 [6] Zhang Y, Yan C, Wang F, Surface and Coatings Technology Vol. 161(2002), p.36 [7] Ma Y, Nie X, Northwood D O, Thin Solid Films Vol. 469-470 (2004), p. 472 [8] H.F.
Xu, Journal of Materials Engineering Vol.0 (2006), p. 29 (in chinese)

Introduction With the rapid development of science and technology, complex surface components have increasing applications in power, aircraft, aerospace and military industry.
Among these, ultrasonic testing has an important role due to its strong penetration, good direction, high sensitivity, low cost, and being harmless to the human body and the material of the components.
Among these are, e.g. the type, size, location and orientation of the defect, materials of inspected components, and environmental conditions.
Acknowledgements This paper is supported by Research Fund of Hunan Provincial Education Department (10C0362), National Natural Science Foundation in China (51005252), and the construct program of the key discipline in Changsha University of Science&Technology(Contract No.08-007).
Wei:Research on an ultrasonic NDT system for complex surface parts, Journal of Materials Processing Technology vol 129 (2002) ,p.667 [4] Hunter, A.

Mechanical Engineering College,Sichuan University of Science＆Engineering，Zigong 643000，China 2.
Processing content Processing methods Tool specification Feed(mm/min) 1 Processing boss shape Rough Pocket Toolpath φ12 plain cutter 1000 2 Removal of surface residual material Contour shape rough machining φ12 bull mill 800 3 Rough machining residual material Rough Parallel Toolpath Ф3 ball cutter 300 4 Clearance by face residual material Contour shape finish machining φ6 plain cuttre 400 3.2Machining and post-processing After generated the tool path, do simulated demonstration using Master CAM X system's physical processing analog functions (as shown in figure 3), timely find the existing problems and improve, minimize material consumption and improve processing efficiency.
Because it is a relatively new high technology, still existing relatively less person who can grasp skilled in this respect, so in the future talent cultivation it need to enhance this respect learning and application to adapt to the development and needs of manufacturing industries Acknowledgements This work was financially supported by The National Natural Science Foundation of China Youth Fund Project (51301115), The Training Project of Sichuan University of Science & Engineering(2012PY06) and teaching material construction project of Sichuan University of Science & Engineering (JC-1208).
Journal of Machine Design,2007,24(4):16-18(In Chinese) [5] Liu Yang, Chen Xi, Shi Geya, Wang jing.

Introduction The rare-earth (RE) doping of Si and Si-related materials [1-8] in the last years has been extensively studied for the development of light-emitting devices in the Si-based optoelectronics initiated by the reports on the photoluminescence (PL) and electroluminescence (EL) centered at around 1.54 μm of Er3+ (4I13/2→4I15/2) in Si [9].
Er Yb codope is an efficient way to improve the luminescence efficiency of Er in Si-related materials.
This work is supported by the Natural Science Foundation of Shandong Province, China (Grant No.
XNBS1341) and the Science and Technology Plan Project of Jinan City, China (Grant No. 201202092, OUT_02440).
Wang, et al.: Journal of Shandong Jianzhu University Vol. 24 (3) (2009), p. 212 [4] M.

Giri, "Optimization of FDM process parameters for dual extruder 3d printer using Artificial Neural network," in Materials Today: Proceedings, 2021
Jeevanantham, "Effect of Normalizing on the Tensile Strength, Shrinkage and Surface Roughness of PLA Plastic," in Materials Today: Proceedings, 2020
Gupta, "Design optimization of PLA lattice in 3D printing," Materials Today: Proceedings
Sandhu, "Effect of slicing parameters on surface roughness of fused deposition modeling prints," in Materials Today: Proceedings, 2022
Lan Cao, "Effect of post-process treatments on mechanical properties and surface characteristics of 3D printed short glass fiber reinforced PLA/TPU using the FDM process," CIRP Journal of Manufacturing Science and Technology, vol.

Graphene oxide has been studied as sensing material for the humidity detection in this paper.
All results implied that the graphene oxide was a potential humidity sensing material for practical use.
Experiment Chemical and Materials GO (0.5mg/ml, carboxyl ratio ~5.0%) was bought from Nanjing XFNANO Materials Tech Co., Ltd.
Novoselov, Graphene sensors, IEEE Sensors Journal 11 (2011) 3161–3170
Zhu, Humidity sensing properties of Pd2+-doped ZnO nanotetrapods, Applied Surface Science 253 (2007) 3168–3173

The basic principles in designing aviation structures must be readjusted due to the innovative concepts regarding the use of advanced materials as well as to the perspectives of using alternative energy aboard UAVs.
The basic principles in designing aviation structures must be readjusted due to the innovative aerodynamic concepts regarding the use of certain materials as well as to the perspectives of using alternative energy aboard UAVs.
References [1] Tsagarakis M, Project Solaris – Analysis of airfoil for solar powered flying wing UAV, Report: MDH.IDT.FLYG.21.10.2011.GN300.15HP.Ae, School of Innovation, Design and Engineering, Mälardalen University Sweden, 79p, available at www.diva-portal.org/smash/get/diva2:450812/FULLTEXT01.pdf . [2] Markin S, Multiple simultaneous specification attitude control of a mini flying-wing unmanned aerial vehicle, 2010, thesis, University of Toronto, 120p, available at https://tspace.library.utoronto.ca/handle/1807/25849. [3] http://www.birdseyeview.aero/products/firefly6, consulted at 11.02.2014. [4] Wirachman W., Rizal E. and others, Wind Tunnel Experiments and CFD Analysis of Blended Wing Body (BWB) Unmanned Aerial Vehicle (UAV), International Conference on AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT- 13, 2009, Military Technical College, Cairo, ASAT-13-AE-13, 15p, available at www.mtc.edu.eg /ASAT13/pdf/AE13.pdf [5] UAS Yearbook, Unmanned aircraft systems – The Global Perspective
Airfoiltools.com, consulted at 10.01.2015. [12] Cioacă C., Qualitative Risk Analysis Methods in Aviation Projects, in Journal of Defense Resources Management, nr. 1(2) 2011, Braşov , ISSN 2068-9403

These factors include workpiece material, grinding wheel characteristics and surface state, grinding manner, cooling conditions, et al.
Acknowledgements The authors are grateful to the National Natural Science Foundation of China (№50275066, 50675088) and Jiangsu Natural Science Foundation (BK2006077) for support of this project.
[3] I.Zarudi and L.C.Zhang: Journal of Materials Science,Vol.37 (2002), p.3935 [4] J.D.Liu: Study on the Forming Mechanism of the Grinding-Hardening Machining and Its Application Fundament (Ph.D., Jiangsu University, China 2005)
[5] J.D.Liu,G.C.Wang,K.M.Chen et al: China Mechanical Engineering,Vol.16(2005), p.1013 [6] G.C.Wang: Metal Cutting Burrs (Jilin Press of Science and Technology, Changchun 1997)
[7] G.C.Wang and C.Y.Zhang: Key Engineering Material,Vol.259-260 (2004), p278 Simulated results Testing results Distance from the surface[mm] Micro-hardness[HV0.5]