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The mechanical characterization of polymeric materials at the micro-level or nano-level can be important for certain materials selection and design criteria and applications.
Asgari, Nanoindentation of Isotactic Polypropylene: Correlations Between Hardness, Yield Stress, and Modulus on the Local and Global Scales, Journal of Applied Polymer Science 121 (2011), 930 - 938
Pharr, Measurement of Hardness and Elastic Modulus by Instrumented Indentation, Journal of Materials Research 19 (1) (2004), 1564 – 1583
Applied Mechanics and Materials.
Kim, Journal of Industrial and Engineering Chemistry 19 (2013), 1879–1883

The composition of the test materials is listed in Table 2.
Composition of the test materials.
Melt densities of the materials.
Melt densities of all the materials were close to 0.9 g/cc and no statistically significant difference was found between any of the materials, and addition of compatibilizer did not change that.
International Journal of Design Sciences and Technology. 22 (2016) 109-138

However, an understanding of the surface mechanical properties, such as hardness and scratch resistance, as well as wear properties of these kind of materials is lacking.
Polyurethane (PU) is an important class of polymer materials for a variety of applications due to their useful properties such as excellent flexibility, elasticity and damping ability.
Therefore, it is reasonably believed that PU can serve as an excellent matrix for polymeric clay nanocomposite materials.
Experimental work Materials fabrication of PU–clay composite material.
intercalated into montmorillonite clay, Materials Science and Engineering: A, Volume 399, Issues 1-2, 15 June 2005, Pages 368-376

Different environmental conditions affect the properties of composite materials and determine their service lives.
So many researches are focusing on the effect of accelerated aging on the properties of composite materials.
Tandon et al. [4], examined the thermo-oxidative behavior of high-temperature polymer matrix composite materials.
Akay and G.R.Spratt: Composites Science and Technology, 2008(68), p. 3081 [3] Liu Dongxun and Zhan Meizhen : Journal of Materials Engineering，1997(11), p. 34 [4] G.P.
Schoeppner: Materials Science and Engineering A, 2008 (498), p. 150

Preparation and Performance Evaluation of PU Foam Composite Board Jia-Horng Lin1, 2, 3, b, Yu-Chun Chuang1, Ching-Wen Lou4, Ting-Ting Li5 and Chen-Hung Huang6, a 1Laboratory of Fiber Application and Manufacturing, Department of Fiber and Composite Materials, Feng Chia University, Taichung City 407, Taiwan. 2School of Chinese Medicine, China Medical University, Taichung 40402, Taiwan. 3Department of Fashion Design, Asia University, Taichung 41354, Taiwan. 4Institute of Biomedical Engineering and Material Science, Central Taiwan University of Science and Technology, Taichung 406, Taiwan. 5School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China. 6Department of Aerospace and Systems Engineering, Feng Chia University, Taichung City 407, Taiwan.
According to materials’ flexibility, puncture-resistance fabric and composites can divide into rigid, half-soft and soft type, and their purpose is to prevent human body from sharp weapons injury [2].
A New Parameter of the Dynamic Buffer Capability of Material, Journal of Vibration and Shock. 20(2001)
Processing Technique and Proper by Evaluation of Stab-Resistant Composite Fabrics, Advanced Materials Research, 239-242(2011), 683-686
Processing Technique and Property Assessment of Stab-Resistant Composite Fabrics, Advanced Materials Research, 239-242(2011) 1990-1993

Introduction Due to the increasing demand on lightweight materials in automotive and aerospace applications, magnesium and its alloys have gained widespread attention in scientific research and commercial application.
L. and Gupta, M. (2005) Enhancing damping of pure magnesium using nano-size alumina particulates, Materials Letters 59, 3851 - 3855 [2] Ferkel, H. and Mordike, B.
L.(2001)Magnesium strengthened by SiC nanoparticles ,Materials Science and Engineering A,298, 193-199 [3] Hassan, S.F. and Gupta, M. (2004) Development of high performance magnesium nanocomposites using solidification processing route, Materials Science and Technology20, 1383-1388 [4] Lee, C.J., Huang, J.C. and Hsieh, P.J. (2006) Mg based nano-composites fabricated by friction stir processing, Scripta Materialia 54, 1415-1420 [5] Lan, J., Yang, Y. and Li, X.
C. (2004) Microstructure and microhardness of SiC nanoparticles reinforced magnesium composites fabricated by ultrasonic method, Materials Science and Engineering A 386, 284-290 [6] Pan, L., Tao, J. and Liu, Z.
L. (2005) Zinc matrix composites prepared by ultrasonic assisted casting method, The Chinese Journal of Nonferrous Metals 15(3),104-109

Monel 400 is one of the widely used high temperature material that can obviate the problems.
Experimental work The base material employed in the study was Monel 400 and its chemical composition include Ni 65.38, Cu 30.25, Fe 2.11, Mn 1.07, Si 0.4 and C 0.1 by weight.
Since the composition of base material and filler material are same, they readily take into solution of nickel, copper and iron by dilution from the parent metal.
Salmenoja, Corrosion Science, Volume 52, Issue 3, March 2010, Pages 1011-1019 [3] V.K.
Mela, Journal of Failure Analysis and Prevention Volume 4, Number 6, 44-50, DOI: 10.1361/15477020421764

The Key Technology of Virtual Reality System Based on Panoramic View Yang Ling1,a, Cheng Yong2,b and Cheng Yun3,c 1 Binjiang College, Nanjing University of Information Science and Technology,Nanjing Jiangsu, 210044, China 2 Jiangsu Technology and Engineering Center of Meteorological Sensor Network, Nanjing University of Information Science and Technology,Nanjing Jiangsu, 210044, China 3 Department of Communication and Engineering, Hunan University of Humanities and Science and Technology, Loudi Hunan, 417000, China a lingyangcy@126.com, b yongchengyl@126.com,c chy6677@163.com Keywords: Virtual reality; fish-eye image; image mosaic; panorama view Abstract.
We can use the same threshold in step 2) and the similar detection process 4) After all the testing, we can use the least squares method to carry on a circular curve fitting to coordinates which is recorded that the brightness difference is greater than the specified threshold; 5) The points which the error is too large are discarded; 6) Fitting the round, the center is of fish-eye image, its radius is of fish-eye images; 7) Get the center and radius of the fish eye image, we can distort the fish-eye image distortion and obtain suitable for stitching images material.
Acknowledgement This paper is funded by Planned Science and Technology Project of Hunan Province, China(Grant No. 2010TC2006); Research Foundation of Education Committee of Hunan Province, China(Grant No. 09A046).
References [1] YING Xiang-Hua, HU Zhan-Yi, Fisheye Lense Distortion Correction Using Spherical Perspective Projection Constraint, Chinese Journal of Computers, 6(12).p.1702-1708. (2003) [2] YANG Ling,CHENG Yun,YUE Zhou,etc.Image Mosaic Algorithm Based on Similar Curve.ISKE,Xiamen University,p.1092-1095.(2008) [3] CHENG Yun, YANG Ling,FANG Zhi-wen, AFast Algorithm for Automated Image Mosaicing,Journal o f Donghua Univ ersity, 27(2).p.250-253.(2010) [4] Bakstein H, Pajdla T.

The authors would like to express their appreciation to China Jiliang University and Hall of Zhejiang Province Science and Technology.
Liu, Soft magnetic ferrite material (In Chinese).
Journal of Kunming University Science and Technology, vol.28 (2003), 17-21
Journal of Shanxi Normal University. vol. 34 (2006), 48-51
Science and technology press, Beijing, 1987.

According to the research material of the experienced Russian search dog training force, generally speaking, a qualified search dog is trained needs 1.5 years at least [7], while its effective working time is less than 3 years [8].
Acknowledgements This project is supported by China Postdoctoral Science Foundation funded project (20100480976) and Postdoctoral Foundation of Heilongjiang Province (LBH-Z09212).
The authors would like to thank Harbin University of Science and Technology for supporting this work.
Huang,B.L.Han and Q.S.Luo: Journal of Huazhong University of Science and Technology Vol.35 (2007), pp.72 [2] P.
Kang: Journal OF HARBIN Institute of Technolog (English) Vol.17 (2010), pp.78