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The tube used in this study is made of a high strength steel material.
On the condition that volume remains constant, the material of hydroformed zone is provided by the adequacy of feeding material.
Fig.5 shows the final part after the completion of hydroforming process with addition of axial feeding of 40 mm at both ends of the part for supplying materials to the zone where thinning occurs and prevents burst.
(as shown in left of figure 5) By analyzing figure 5 it is possible to observe that there are some geometrical limits in tube hydroforming processes: the maximum diameter tube expansion depends on materials properties and tube thickness.
Journal of Mechanical Science and Technology, 2007,(21):1523-1527 [3] Jeong Kim, Sung-Jong Kang, Beom-Soo Kang.

Materials and Methods Separation, analysis and testing of the white and green Halimeda samples were completed in Qingdao Institute of Marine Geology.
Results and Discussion 3.1 Sedimentary Characteristics of Modern Halimeda All the Halimeda segments consist of cortexes, medullas and interstitial materials that fill in them[7,9].
Chinese Science Bulletin. 44 (13) pp.1435-1439.
Marine Sciences. 1 (2) pp.20-21.
Earth Science (Journal of China University of Geosciences). 20 (10) pp.94-104.

Preparation of Ruby Red Glasses from Gold Nanoparticles : Influence of Soaking Time Yotsakit Ruangtaweep1,2,a and Jakrapong Kaewkhao1,2,b,* 1Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand 2Science Program, Faculty of Science and Technology,Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand ayotsakitt@hotmail.com, bmink110@hotmail.com Keywords: Soaking time, Gold nanoparticles, Optical properties, Red glass Abstract.
The refractive index depend on density and on polarisabilities of the atom in a given materials [6].
Jitwatcharakomol, EFFECT OF SELENIUM DIOXIDE CONTENT ON COLOR OF SELF-STRIKING GOLD RUBY GLASS, 35th Congress on Science and Technology of Thailand.
Kaewkhao, Preparation of Ruby Red Glasses from Gold Nanoparticles: Influence of Stannic Oxide, 4th International Conference on Mathematics Natural Sciences.
Komatsu, Classification of Simple Oxides: A Polarizability Approach, Journal of Solid State Chemistry. 163 (2002) 100-112

Nanoparticles have attracted significant attention due to their various applications in the fields of biotechnology and biomedical sciences.
Materials and methods Preparation of chitosan-PCP nanoparticles.
Female ICR mice (18–22 g, 6 weeks) were purchased from the Department of Experimental Animals, Academy of Military Medical Science, Beijing.
Chitosan, a biocompatible material, was linked with counterion TPP to form an ionotropic gelatin.
Vol.10 (2012), p. 2002 [4] Ni Li, Yu-Lan Hua, Cai-Xia Hea, Cheng-Jie Hua, Jun Zhoub,Gu-Ping Tang: Journal of Pharmacy and Pharmacology.

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.

Materials and methods 2.1 Materials The liquors used in this study were the leach liquors from pressure leaching of a Chinese laterite.
Acknowledgements This work was financially supported by Teacher Growth Fund of Guangxi Normal University, Guangxi Natural Science Foundation (2012GXNSFAA053192) and National Natural Science Foundation of China (51264003).
International Journal of Mineral Processing Vol.77(2005),P. 53.