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Lewinnek et al. suggested “safe zone” concept that deviation in fixation angles of acetabular cups could affect loosening behavior[3] and such the deviation was usually confirmed by X-ray observation[4].Furthermore, plasma-sprayed Hydroxyapatite (HAp), which has been applied on the surface of acetabular components as an effective boding to surrounding bone, has a risk of fracture in service[5,6].
[2] Abu-Amer, Y., Darwech, I. , Clohisy, J.C., Aseptic loosening of total joint replacements: Mechanisms underlying osteolysis , potential therapies, Arthritis Research , Therapy, 9 (SUPPL.1), S6,(2007) [3] Lewinnek, G.E., Lewis, J.L., Tarr, R., Compere, C.L., Zimmerman, J.R., Dislocations after total hip-replacement arthroplasties, Journal of Bone , Joint Surgery - Series A 60 A (2) , pp. 217-220,(1978) [4] Kalteis, T. , H,el, M. , Herold, T. , Perlick, L. , Paetzel, C. , Grifka, J., Position of the acetabular cup-accuracy of radiographic calculation compared to CT-based measurement, European Journal of Radiology 58, 294–300, (2006) [5] Y.

El-Kadri, I.
Al-Homoudi, J.S.

Yijun Chen et al [3] introduced the novel component technologies to develop a flexible 3D visualization system of container terminal.
References Reference an article: [1] J.B.Klaassens，G.Honderd，A.El Azzouzi，Ka C.Cheok，G.E.Smid. 3D modeling visualization for studying controls of the Jumbo container crane.

Introduction Since the first report of using carbon nanotubes (CNTs) as nanoscale fillers by Ajayan et al. in 1994, these nanostructured materials with molecular-scale tubes of graphitic carbon have become the subject of intensive research worldwide, both fundamental and applied [1-3].
El-Sadig and D.R.A.

Finally, Al was sputter deposited, patterned and wet etched to form contact pads.
El, IEEE Transactions on Electron Devices, 62 (2015) 316-323

If using middle temperature or spotlight solar heaters to heat air and seawater, the freshwater production cost would be reduced significantly. 5 References [1] S.A.El-Agouz, M.Abugderah.
[3] Sandeep Parekh, M.M.Farid, J.R.Selman, Said Al-Hallaj.

Tsuji et. al. [10] proposed two possible mechanisms for the formation of the wire structures by laser irradiation at 355 nm of spherical silver colloids in pure water.
El-Sayed: J.

Hakuno et al. modified Cundall’s method and applied it to concrete structures [2].
The loading earthquake wave is the three-dimensional EL-Centro wave.

Recently, Yang et al proposed an algorithm of extended Kalman filter for structural damage identification under unknown inputs and a sequential nonlinear least square estimation with unknown inputs and outputs [5].
Ou. et. el.

Therefore, Cassidy J E[1] et al did further research and prepared phosphate cementing material which is cheap and quick-setting and has been applied to the maintenance material of civil engineering for a long time[2].
Cem Concr Res, 1983,13(5): 499-506 [11] Abbelrazing B E I, Sharp J H, El-Jazairi B.