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Experimental Materials, Equipment and Experiment Processing 9 5/8 "× 11.99mm-P110 casings into unworn casing samples and eccentric worn casing samples with 2,4 mm wear depth respectively, Figure 1.Measuring the critical sections of unworn casing samples and eccentric worn casing samples under concentrated forces, namely, the hoop stresses of the outer surface of the casings on the worn position of the thinnest wall thickness.
Casing material geometrical and physical parameters are shown in table1.
References [1] Sun L Z,Gao,D.L, Zhu, K.L.Jounal of Natural Gas Science and Engineering, 2011,6:1-4
Petroleum Science, 2010, 7(4), 494-501
Journal of Engineering for Industry, 5(1976), 686-694

A novel synthesis process of PPTA by nitrogen cooling for reaction heat removal Hongbin Li1, a, Wenying Shi2, b *, Yufeng Zhang1, c * 1School of Materials Science and Engineering, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300387, P.
Pourjavad: Computational Materials Science.
Wei: The Chinese Journal of Process Engineering.

Arpaç: Solar Energy Materials and Solar Cells Vol. 93 (2009), p. 1833 [3] G.
Aranzabe: Solar Energy Materials and Solar Cells Vol. 94 (2010), p. 1081 [5] G.
Wang: Journal of Functional Materials Vol. 34 (2003), p. 579 [7] C.Y.
Ma: Building Materials Industry Information Vol. 10 (2003), p. 39 [9] D.G.
Zhu: The World of Building Materials, Vol. 30 (2009), p. 12 [10] J.F.

Lee 4 1 Department of Mechanical Engineering, Inha University, Incheon, 402-751, Korea 2 Graduate School of Mechanical Engineering, Inha University, Incheon, 402-751, Korea 3 School of Materials Science, Inha University, Incheon, 402-751, Korea 4 School of Materials Science and Engineering, Yeungnam University, 712-749, Korea Keywords: Machinable Ceramics, Al2O3-BN, In-process Electrolytic Dressing Lapping (IEDL), Diamond lapping wheel, Surface roughness.
The relationship between the IEDL process and mechanical characteristics of Al2O3-BN composites obtained in this study could provide useful information to understand the machinability of these unique machinable ceramic materials.
After mirror polishing Vickers' crack was intro- duced in the material.
Acknowledgement This work was supported by grant No.R01-2001-000-00257-0 from the Basic Research Program of the Korea Science & Engineering Foundation.
Kim: Korean Journal of Material Research Vol. 8 (1998)

Introduction In recent years, considerable attention has been devoted to the conversion of near-infrared radiation to visible light in rare earth-doped materials.
One of the most efficient NIR to green and red upconverting materials is β-NaYF4 [7].Annina Aebischer and co-workers reported the synthesis and light emission properties of α-NaYF4:Er3+, Yb3+ [8].
The nearly white materials were obtained while the crucible is cool down.
This material showed the same upconversion fluorescence emission intensity compared to β-NaYF4 material.
Mitchell: Journal of Alloys and Compounds. 451 (2008), p. 526 [2] J.C.

Hot deformation of Ti–5Al–5Mo–5V–1Cr–1Fe near β titanium alloys containing thin and thick lamellar α phase, Materials Science & Engineering A 573 (2013) 75-83
Materials Science & Engineering A 2013 Accepted Manuscript
Wang, Fatigue crack nucleation and growth behaviors of laser melting deposited Ti–6Al–2Zr–Mo–V [J] Materials Science and Engineering A 527 (2010) 1933–1937
Journal of Alloys and Compounds 496 (2010) 189–195
Shi, et al．Chinese engineer materials canon (fourth volume) [M] ．Beijing：CIP, (2006)623-626 [11] K.

Acknowledgements The work is supported by Shan xi Natural Science Fund (No.2005-1051).
Jin: Mechanical Science and Technology, Vol.20 (2001) No.1.
Wang: Key Engineering Materials, Vols.304-305 (2006), pp.379-383
Kawashima: Journal of Materials Processing Technology, Vols.143-144 (2003), pp.682-686
(In Chinese) [8] Physical Department of Beijing University: Ferromagnetic (Science Press, Beijing 1976), pp.123-162.

Introduction Longitudinal strength is a very important aspect in ship strength. [1-3] In 2001, China Classification Society (CCS) “Classification and Construction Criterion of Steel Ships” stipulated that when the hull is in the condition of longitudinal bending, the bending stress on the hull cross section is calculated to be equal to the moment divided by section modulus, [4] this conclusion is based on the bending theory in mechanics of materials drawn from the beam.
Acknowledgments This work was financially supported by the Naval University of Engineering Natural Science Foundation （HGDQNJJ13036）.
The reliability of ship’s longitudinal strength [J].Ship science and technology, 2011, 33(10):50-53P
Stability of the deck and the longitudinal strength [J].Ship science and technology, 2002, 24(6):5-9P
Two calculating methods of container ship’s longitudinal strength [J].Journal of ship mechanics,2001,5(1):42-48P

They also accurately describe the depression in melting point for an alloy relative to the pure material anticipated in eutectic systems.
Acknowledgments Project 50704015 supported by National Natural Science Foundation of China.
Baskes: Materials Science Reports Vol. 9 (1993), p. 251 [7] M.
Staicopolus: Journal of Colloid Science Vol.18 (1963), p. 793 [10] G.

Experimental Materials and equipments Cotton cellulose (DP 1100) was supplied by Hubei Xiang Tai Cellulose Co., Ltd.
Compared with the raw material cellulose, the diffraction peak intensity at 2θ =22.6 ° decreased from 22,600 to 15,000, reflecting that the degree of crystalline of cellulose decreased with 33.6%.
Acknowledgements We are grateful for the financial supports of this research from National Science Foundation of China (No.20876032) and the Natural Science Foundation of Hebei Province (No.2009000023).
Journal of Environmental Management vol 80 (2006), p. 342 [8] J.W.
Averill (Eds.), Catalysis: An Integrated Approach,Elsevier Science B.V., Amsterdam, 1999, p. 459