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Experimental methods The experimental material was 4Cr5MoSiV steel.
The sample was polished progressively by the water sandpaper, then put it in acetone under ultrasonic cleaning the surface, the distilled water is used to clean and dry the test material.
Journal of Electroplating & Finishing,2011 [5] X.
Chinese Journal of Vacuum Science and Technology,2008,28(5):486-491

Acknowledge This work is supported by the National Natural Science Foundation of China (No. 50975199).
Journal of Xi'an Jiao tong University,45(2011)52-58
Journal of Nanchang University (Engineering & Technology), 30(2008) 79-82
[6] Bin Lin, Xiaofei Dong, Guanwei Zhang.Applied Mechanics and Materials,215 (2012) 837-841 [7] Meruane V,Pascual R.

A dedicated finite element (FE) modeling technique for simulating nonlinear properties of ultrasonic Lamb waves under the modulation of fatigue cracks in metallic materials was established.
Qian, Nonlinear Acoustics (Chinese), first ed., Science Press, Beijing, 1992
Cantrell, Substructural organization, dislocation plasticity and harmonicgeneration in cyclically stressed wavy slip metals, Proceedings of the Royal Society of London, Series A, Mathematical and Physical Sciences (2004) 757–780
Jhang, Nonlinear ultrasonic techniques for nondestructive assessment of micro damage in material: A review, International Journal of Precision Engineering and Manufacturing 10 (2009) 123-135
Ye, Lamb wave propagation-based damage identification for quasi-isotropic CF/EP composite laminates using artificial neural algorithm, Part II: implementation and validation, Journal of Intelligent Material Systems and Structures 16 (2005) 113-125.

Souza, Influence of Heat treatment on the intergranular corrosion resistance of the AISI 347 cast and weld metal for high temperature service, Materials processing technology, (2007)
[2] American Society for Testing and Materials, Standard practices for Detecting to Intergranular Attack in Austenitic Stainless Steels, ASTM A262-86(1989)
Souza, Microstructural and electrochemical characterization of the low temperature sensitization of AISI 321 stainless steel tube used in petroleum refining plants, materials science, (2003)
Allais, Mechanisms of stress relief cracking in Titanium stabilized austenitic stainless steel, journal of nuclear materials, 323, 123. (2003) [5] F. liu, Y.
Hwang, the effect of post weld heat treatment on the creep-fatigue behavior of gas tungsten Arc welded 308L stainless steel, Material science and engineering A 427.35. (2006)

6 show that in the cutting conditions of f=0.1mm/r, ap=0.1mm, workpiece material with hardness in HRC62-64 began generating serrated chip in the cutting speed v=60m/min, Figures 7 show that workpiece material with hardness in HRC50-52 began generating serrated chip in the cutting speed v=140m/min; in the cutting conditions of v=60m/min，ap=0.2mm, Figures 6 show workpiece material with hardness in HRC62-64 began generating serrated chip in the feed of f=0.05mm/r, Figures 7 show that workpiece material with hardness in HRC50-52 began generating serrated chip in the feed of f=0.16mm/r.
Acknowledgments This work was supported by National Natural Science Foundation of China (51175227).
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Material Aspects of Chip Formation in HSC Machining.

China 2School of Management, Wuhan University of Science and Technology, Wuhan 430081, P.R.
In the upstream of the industry chain, Chou Tai Fook has established joint venture companies engaged in the acquisition of raw materials.
This business model learns from the core concept of the modern business model and makes elaborative selections of good suppliers to ensure strict filter starting from the raw materials and guarantee optimum product quality.
They own the price advantages because raw materials are sourced from suppliers and they share but not scramble for the interests
Parasuraman, Reflections on gaining competitive advantage through customer value, Journal of the Academy of Marketing Science 25 (1997) 154-161

Acknowledgements This work was financially supported by Natural Science Foundation of China Project (No. 51165030).
Chang, Journal of Crystal Growth, 8, 290 (2006) [2] Ohno A.
Fan, Journal of Materials Science, 7, 44 (2009) [4] Lei Rao, X.
Li, Journal of Shanghai Jiaotong University, 3, 10 (2001)

Through the establishment of industry clusters, the transportation distance of raw materials and parts is shortened, which correspondingly drives down the logistic costs. (2) Competitive advantage.
As China’s major science and technology centre and having numerous intellectuals, Wuhan City Circle is far in advance of quantity of talent and strength in research capability.
References [1] Lin Ni, Hongbing Deng: submitted to Journal of Special Zone Economy (2007).
Porter: submitted to Journal of Harvard Business Review (1998)
[4] Qin Qin, Li Xiong: submitted to Journal of Market Modernization (2005).

The removal operation is mostly outdoor and even in harsh environments, thus some of the materials must be corrosion resistance.
Acknowledgement This study was supported by Natural Science Foundation Project of CQCSTC 2009BB1297, Fundamental Research Funds for the Central Universities of China XDJK2009B028, 2009C004, Fund for the Doctoral Program of Southwest University of China SWU109006, and projects of the 2nd Southwest University “Han Hong Cup” the 12th national “Challenge Cup” of undergraduate curricular academic science and technology.
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Application of Novel Subspace Pursuit on Guided Wave Signal Recognition based on Modified Differential Evolution Algorithm Chuanjun SHEN1, a, Yuemin WANG 2, b, Yan LIU3, c and Fengrui SUN 4,d 1Naval University of Engineering, College of Architecture and Power, China 2Naval University of Engineering, College of Architecture and Power, China 3Naval University of Engineering, College of Science, China 4Naval University of Engineering, College of Architecture and Power, China achuanjunshen@sohu.com, bwangde99@163.com, cgreerliu@126.com, dfengruisun@126.com Keywords: Modified differential evolution, Modified subspace pursuit, Ultrasonic guided wave, Wigner-Ville distribution, Signal recognition Abstract.
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