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The first zone is the nitrided layer, the second is the diffusion layer, the third is the deformed layer, the fourth is the base material.
Materials science: textbook for mechanical engineering universities - 3rd ed., revised and add.
Metal Science and Heat Treatment, 2011, 53(7-8), pp. 344–346
Journal of Physics: Conference Series on November 01, 2019. 1353(1), 012081
Sciences, Institute of Microstructure Physics, Nizhny Novgorod, 2004.

The concept of mechanical scaling symmetry is from the scaling symmetry of natural science[5], which is used for describing the existent that the symmetry components and symmetry benchmark changing orderly according to certain rules describing by some mathematical formulas in mechanical static structure symmetry[6].
Fig. 1 A lever check chain[4] Fig. 2 A gearbox[7] As a common type in mechanical static structure symmetry, mechanical scaling-translation symmetry plays an important role in transmitting materials, transferring motion, advancing the intensity of functions and broadening the boundary of functions.
Acknowledgements This work was financially supported by the Ningbo Natural Science Foundation (2011A610153) and the Talent Project of Ningbo University(2010).
Newswood Limited, UK, 2008, p.1478-1486 [2] MA Zhi-yong, FENG Pei-en, QIU Qing-ying: Journal of Zhejiang university(Engineering science) Vol. 44(2010), p. 2354-2359 [3] Zhiyong Ma: submitted to The 2nd International Conference on Advanced in Materials and Manufacturing Processes (ICAMMP 2011) [4] Zhongliang Li, Yongli Lin(Translation): Modern machine wikipedia(First Volume)(World Publishing Corporation, Beijing 1990)
[5] Shida Liu, Shikuo Liu: Acta Scientiarum Naturalium Universitatis Pekinensis, Vol. 33(1997), p.669-680 [6] Peien Feng, Zhiyong Ma and Qingying Qiu: Progress in Nature Science Vol. 18(2008), p. 1441-1450(In Chinese) [7] Xianyuan Meng, Qi Jiang: Design and application of mechanism(China Machine Press, Beijing 2004).

Materials and Methods Working Principle of the Beating Machine.
Ryzhov: Progress in Aerospace Sciences, Vol. 39 (2003), p. 585
Ho: Progress in Aerospace Sciences, Vol. 39 (2003), p. 635
Sane: Science, Vol. 284 (1999), p. 1954
Shang: Journal of Materials Processing Technology, Vol. 89-90 (1999), p. 88

Acknowledgements This project is supported by national natural science foundation of China (59875063, 50345022, 50675149) and provincial natural science foundation of Shanxi (981046, 20041058) References [1] S.C.
Li: Key Engineering Materials, Vols. 259-260 (2004), pp.549-552
Li: Key Engineering Materials, Vols.259-260 (2004), pp.544-548
Yang: Journal of ShanDong University (Engineering Science), Vols.34 (2004) Supp
Hao, J.M. and et al.: Entironment Science, Vols. 26 (2005), pp.33-37

Isolation and identification of a heterotrophic nitrifying bacteria and study on removal of nitrite nitrogen Qingman Cuia, Haiwen Wangb, Wanying Wangc and Chunying Yuand College of Marine Science and Engineering, Tianjin University of Science & Technology, Tianjin Key Laboratory of Marine Resource and Chemistry, Tianjin 300457 aemail: cqm80@163.com, bemail:751021607@qq.com, cemail:362017475@qq.com, demail: ycy201388@163.com Keywords: Isolation and identification, Heterotrophic nitrifying bacteria, Nitrite nitrogen, Acinetobacter baumanii Abstract.
Materials and methods 1.1 实验材料 Eexperimental materials.
European Journal of Pharmaceutical Sciences Vol. 15(2002), p. 1-9 [4] Francois-Joel Gatesoupe: Probiotic and formaldehyde treatments of artemia nauplii as food for larval pollack, Pollachius pollachius.
Beijing: China Environmental Science Press (2002), p. 254-296 [9] L.

Yan: Generalized kinematic analysis of planetary gear trains, International Journal of Vehicle Design, 13(5/6), pp. 494-504 (1992)
Cipra: Simplified kinematic analysis of bevel epicyclic gear trains with application to power-flow and efficiency analyses, ASME Transactions, Journal of Mechanical Design, Vol. 127, pp. 278-286 (2005)
[6] Mi-Ching Tsai & Cheng-Chi Huang: Kinematic analysis of planetary gear systems using block diagrams, ASME Transactions, Journal of Mechanical Design, Vol. 132, 065001 (2010)
Chen: An algorithm for the kinematic design of gear transmissions with high reduction ratio, Materials Science Forum, Vol. 505-507, pp. 1003-1008 (2006)
[13] Velex, P. & Flamand, L.: Dynamic response of planetary trains to mech parametric excitations, Transaction of the ASME, Journal of Mechanical Design, Vol. 118, pp. 7-14 (1996)

Acknowledgements This work was financially supported by the Ningbo Science and Technology Agency Foundation (2010C50002).
Zha: Advanced Materials Research, Vol. 243-249 (2011), pp. 1573-1577
Jiang: Journal of Vibration and Shock, Vol. 23 (2004) No. 4, pp. 99-103 (in Chinese)
Biswas: Journal of Sound and Vibration, Vol. 169 (1994), pp. 3-17
Samman: Journal of Sound and Vibration, Vol. 145 (1991), pp. 321-33.

The Numerical Simulation of Composite Explosive Energy Coupling in Underwater Explosion Qian Zhao*a, Gengguang Xub State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing China azhongbeizhaoqian@163.com, bxgg@bit.edu.cn Keywords: The dual explosive charge, Energy coupling, Energy output, Numerical simulation Abstract.
Chinese Journal of explosives and Propellants, 2002, 25 (4): 35-38
Chinese Journal of Energetic Materials, 2009, 8 (17): 415-418
Journal of north China institute of technology, 2001, 22 (4): 301-303
Chinese Journal of explosives and Propellants, 2009, 31 (1): 79-82.

A classical definition of sensory evaluation is given by Stone and Sidel and Dijksterhuis [1] as follows: Sensory evaluation is a scientific discipline used to evoke measure, analyze, and interpret reactions to those characteristics of products or materials as they are perceived by the senses of sight, smell, taste, touch and hearing.
Curt a, Modeling the operator know-how to control sensory quality in traditional processes, Journal of Food Engineering , Vol.83(2007),p.156–166
Information Sciences, Vol.8,8, 9 (1975) (Part I–III),p.199–249, 301–357, 43–80
Lawry, A methodology for computing with words, International Journal of Approximate Reasoning, Vol.28(2001),p. 51–89
Chen, Applying linguistic decision-making method to deal with service quality evaluation problems, International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems, , Vol.9 (Suppl.) (2001),p.103–114

Application of Feed-Forward Neural Networks for Classifying Acoustics Levels in Vehicle Cabin Ahmad Kadri Junoh1,a , Zulkifli Mohd Nopiah2,3,b and Ahmad Kamal Ariffin2,3,c 1Industrial Mathematics Research Group (IMRG), Institute of Engineering Mathematics, Universiti Malaysia Perlis, 02000, Kuala Perlis, Perlis, Malaysia 2Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia 3Centre for Automotive Research, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia aahmadkadrijunoh@gmail.com, bzmn@vls.eng.ukm.my, ckamal@vls.eng.ukm.my Keywords: Sound Quality, Acoustics Level, Neural Network Optimization Abstract.
However, in science and engineering any particular acoustics level must be referred and measured numerically and should be readable to enable the researchers to identify the volume of the sound quantitatively.
Murphey Multi-class pattern classification using neural networks, The Journal of the Pattern Recognition Society, 40 (2007) 4-18
Dempsey Using Feedforward Neural Networks and Forward selection of Input Variables for an Ergonomics Data Classification Problem, Journal of Human Factors and Ergonomics in Manufacturing, 14(2) (2004) 31-49 [6] X.
Wah Constructing and training feed-forward neural networks for pattern classification, The Journal of the Pattern Recognition Society, 36 (2003) 853-867.