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Meanwhile the erosion wears of valve also be affected by the structure and materials of the valve spool, and the shape of flow.
Materials selection.
The selection of materials is considered mainly to occur erosion and improve magnetic density for the MRF in the working gap which includes valve spool material of the main valve and magnetic material.
References [1] Kordonsky W.I: Magnetism and Magnetic Materials Vol. 122 (1993), p. 395
Liang: Journal of coal science & engineering Vol. 33 (2008), p. 214

Introduction Exploring novel materials based on semiconductor nanoparticles has become one of the most attractive areas of current research.
Exploitation of these properties has made QDots promising materials for many applications, including third generation photovoltaic’s [1-5].
Materials and Reagents Mercaptosuccinic acid (MSA) was obtained from Aldrich Chemicals.
Science 271, 933- 937 (1996)
Science 271: 933–937

Experimental Raw materials.
The chemical compositions of all raw materials were listed in Table 2.
Construction and Building Materials,2007, 21(6): 1342-1350 [5] Weiguo Shen, Mingkai Zhou, Qinglin Zhao.
Construction and Building Materials, 2007, 21(7): 1480-1485 [6] Guo Xiao Lu, Shi Hui Sheng.
Construction and Building Materials, 2008, 22(7):1471-1476

Fragrance materials generally compose of organic ester and various alcohols.
As in the processing, rubber materials must experienced heat not only in mixing step but also in the vulcanization step.
And for the final product, this carrier should be able to control the releasing rate of fragrance materials.
In organic carrier was found suitable for carrying fragrance materials.
Materials and Methods 2.1 Materials NR used for the present investigation was NR STR 5L.

These materials rank among health-conscious and usable in some medical applications.
Introduction “Plastic materials are an important part of everyday life.
This article focuses on plastic materials that can be used in medicine.
Measured Materials The selected materials for the production of the models are Polylactic Acid (PLA) and Polyethylene Terephthalate Glycol (PET-G).
Katerska, Some Biocompatible Materials Used in Medical Practice, Trakia Journal of Sciences, Vol. 8, Suppl. 2, (2010) 119-125

Materials and Methods Bacterial strain Bifidobacterium bifidum was obtained from College of Life Science & Engineering, Shaanxi University of Science & Technology.
The five materials could significantly improve the survival rate of B. bifidum and the number of viable cells of lyophilized powder; K2HPO4 was the best cyroprotectant among the five materials.
Acknowledgements This work was supported by the key project of Shaanxi Academy of Sciences (No.2010K-03).
International Journal of Food Microbiology, Vol.74 (2002), p.79 [3] Cross, M.
Advanced Materials Research,Vol. 382(2012),p.454

Introduction Glasses doped with rare-earth ions (REn+) are proving to be luminescence materials as they have high emission efficiencies.
Appropriate amounts of the raw materials, B2O3, ZnO, Bi2O3, and Ho2O3 of 99.9 % purity, were thoroughly mixed and ground in porcelain crucibles and were later melted in an electrical muffle furnace for 3 h, at 1200 oC.
After complete melting the raw materials, the melts were cast into a preheated stainless steel mould and immediately transferred to an annealing furnace at 500 oC for 3 h in order to eliminate internal mechanical stress.
Chary, FTIR and some physical properties of alkaline earth borate glasses containing heavy metal oxides, International Journal of Engineering Science and Technology. 3 (2011) 6998-7005 [10] Q.
Yu, Spectroscopic properties of Ho3+ ions in biaxial Lu2SiO5 crystal, Optical Materials 32 (2010) 873–877 [11] G.H.

Ship design accounted for 80 percent of failure and explored in depth the supply and selection of raw materials.
Two points need to claim: the policy-makers of raw materials supply, and the ship maintenance.
The accessories were dependent on the design drawings offered by design institute, which determined that raw materials supply was occurring in ship construction, and that raw materials suppl wass belonging to construction period.
Journal of Ship Production, 2009, 25(1): 33-44
Jiangsu University of science and tecnology,2012

TEM observation was performed in the Technical University of Košice, Institute of Materials and Quality Engineering.
Loria (ed), Superalloy 718 – Metallurgy and Applications, The Minerals, Metals & Materials Society, 1989
Belan, Study of Advanced Materials for Aircraft Jet Engines Using Quantitative Metallography, in: R.K.
Uhríčik, The overview of intermetallic phases presented in nickel base superalloys after precipitation hardening, Manufacturing technology: journal for science, research and production 15, 4 (2015) 509-515
Jonšta, Material Analysis of Nickel Superalloy for Military Technology, Manufacturing technology: Journal for science, research and production 16, 2 (2016) 348-354.

Stabality Analysis of Deep Roadway Based on Coupled Thermo-Hydro-Mechanical Behaviors Qifeng Guo1,2,a, Fenhua Ren1,2,b and Zhaocai Zhang1,2,c 1School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China 2Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China aqifeng_024@163.com, brenfh2001@sina.com, czhangyicando@163.com Keywords: stress field, seepage field, temperature field, three fields coupled, stability analysis Abstract.
The mechanical constitutive relation of mall deformation elastic material like rock is: (6) in which, &: total stress & total strain; K&G: bulk modulus & shear modulus; : linear coefficient of thermal expansion; : Biot coefficient; : Kronecker sign.
Beijing: Science Press, 2001.
Chinese Journal of Rock Mechanics and Engineering, 2005,24(16): 2803-2813.
Electronic Journal of Differential Equations, Vol,2003.