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The arches are easily transportable, rapidly deployable and do not require the heavy equipment or large crews needed to handle the weight of traditional construction materials.
At the present stage of knowledge, four general approaches are taken for selecting the n value: (1) consulting tables or photographs of channel reaches of typical n values which can be used to estimate n for a different reach with recognizably similar characteristics; (2) measuring friction slopes, discharges and some cross-sections which is both time consuming and expensive; (3) adopting empirical formulas to estimate the values of roughness based on the particle size distribution curve of surface bed material; or (4) adopting empirical formulas to estimate the values of roughness based on friction slope or water surface slope.
Acknowledgements This work was financially supported by Shandong water conservancy science and technology plan (No :sdslky201301).
JOURNAL OF HYDRAULIC ENGINEERING © ASCE / MAY 2011 606-611 [3] Stefano Pagliara and Iacopo Carnacina.
JOURNAL OF HYDRAULIC ENGINEERING © ASCE / FEBRUARY 2011 pp254-262 [4] B.Mottahed.

This work was supported by China Postdoctoral Science Foundation (No.20110491844) and the Natural fund of PLA University of Science and Technology (No.20110308) References [1] WANG Fengshan, ZHANG Hongjun.
Calculation and Assessment on Damage Effect of System Target, Chinese Journal of ACTA ARMENTARII.
Experimental and Theoretical Studies of Projectile Penetrating Rocks, Chinese Journal of Rock Mechanics and Engineering.
Mathematical Description of Vulnerability of Deep Buried Target, Journal of Ballistics.
Journal of Command Control and Simulation.

Chitin nonwoven materials are made from chitin fiber by using nonwoven materials processing technique, which compounds disadvantages of chitin and nonwoven materials.
But there is little research report about pure chitin spunlace nonwoven materials.
Production Process of Pure chitin Fiber Nonwoven Materials Raw Material.
Y.: Wool Textile Journal.
K.: Journal of Tianjin Polytechnic University.

Modifications of the Extrusion process of Magnesium Alloys for improved Mechanical Properties Soeren Mueller1,a, Klaus Mueller1,b Walter Reimers2,c 1 Technical University Berlin, Institute for Materials Science and Technology, Extrusion Research and Development Center, Gustav-Meyer-Allee 25, 13355 Berlin, Germany 2 Technical University Berlin, Institute for Materials Science and Technology, Ernst-Reuter-Platz 1, 10587 Berlin, Germany a soeren.mueller@tu-berlin.de, bkmuedjjj@mailbox.tu-berlin.de, cwalter.reimers@tu-berlin.de Keywords: Magnesium, extrusion, ECAE, counter pressure, microstructure, texture, mechanical properties Abstract.
Metals with Glide Asymmetry", Materials Science And Engineering, A108 (1989) pp. 227 - 232
Reimers, "Microstructure development of differently extruded Mg alloys, Part 1", Aluminium International Journal, 82, 4 (2006) pp. 327 - 330
Reimers, "Microstructure and mechanical properties of the extruded Mg-alloys AZ31, AZ61, AZ80", International Journal of Materials Research, 97, 10, 2006, 1384-1391 [7] M.
Richert, "A new method for unlimited deformation of metals and alloys", Aluminium International Journal, 62, 8 (1986) pp. 604 - 607

All materials were considered homogeneous, isotropic and having linear elasticity.
Materials and method For the study of the removable partial denture’s stresses and displacement distribution was used FEA.
The denture was scaned in Dental View radiology center and the tomographic images were combined with the constant mechanical and thermal properties of the materials and were used to create the 3D model (Fig.1).
All materials were considered homogeneous, isotropic and having linear elasticity.
Vergani et all, Clinical evaluation of failures in removable partial dentures, Journal of Oral Science, 54:4 (2012) 337-342

Preparation and Megnetic Performance Study of One Dimensional Co-Ni Nanomaterial Lixiang Lu1, a,Hongying Yu*1, b,Dongbai Sun2, c,Wanheng Lu2, d 1Laboratory for Corrosion-Erosion and Surface Technology, Corrosion and Protection Center, University of Science and Technology Beijing, Beijing, China. 2National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing, China.
Co-Ni alloy nanomaterials have potential applications as high-density- storage media,high-quality magnetofluid, electro-magnetic shield and microwave absorbing materials, fuel cell,electronic devices,biological engineering materials due to their special surface magnetic and catalytic properties[4].
Ordnance Material Science and, Engineering 2007,30(3):68-71
Status of Preparation and Application of Quasi One-dimensional Ni-Co Alloy Material[J].Materials Review, 2010.24(5):93-96,100
Journal of Nan jing University of Technology, 2008.11, 30(6): 63-66

Experimental Program Materials and mixtures.
It is a process of hydration gradually of cementitious materials.
Jia, Review of experimental and research methods on shrinkage and cracking resistance of concrete at home and abroad, China building materials science & technology, 1(2001) 27-31
Gao, Effect of coarse aggregate on cement concrete thermal parameters, Journal of changsha university of science and technology (natural science), 9(2012)37-41
Zhao, An experimental study on thermal conductivity of air entraining concrete, Journal of hebei university of engineering (natural science edition), 28(2011)17-20.

Yakobson, C2F, BN, and C nanoshell elasticity from ab initio computations, Physical Review B - Condensed Matter and Materials Physics 64(23) (2001) 235406
De, Mechanical properties of the hexagonal boron nitride monolayer: Ab initio study, Computational Materials Science 56 (2012) 11-17
Physical Review B - Condensed Matter and Materials Physics 85(12) (2012) 125428
Oh, Elastic properties of various boron-nitride structures, Metals and Materials International 17(1) (2011) 21-27
Le, Size effects in mechanical properties of boron nitride nanoribbons, Journal of Mechanical Science and Technology 28(10) (2014) 4173-4178

On the other hand, improper membrane hydration causing cell performance degradation [5] and leads to permanent damage to the membrane material [5].
The bipolar plates were made from untreated SUS 316 stainless steel material replacing commonly use graphite material.
The endplates were made from transparent acrylic material with 20mm thickness.
Crespo, Swelling of polymeric membranes in room temperature ionic liquids, Journal of Membrane Science. 296 (2007) 131-138
Mazza, A review of water flooding issues in the proton exchange membrane fuel cell, Journal of Power Sources. 178 (2008) 103-117

The wear loss of materials in the real wear process is frequently the simultaneous combination of numerous mechanisms.
Vaßen, Thermal Spray Processes for the Repair of Gas Turbine Components, Advanced Engineering Materials 22(6) (2020) 1901237
Kumar, A critical review on thermal spray based manufacturing technologies, Materials Today: Proceedings 62 (2022) 7265-7269
Daniel, High temperature materials for heavy duty diesel engines: Historical and future trends, Progress in Materials Science 103 (2019) 109-179
Cornet, Combined plasma spray and in situ laser melting treatment of NiCrBSi powder, Journal of Optoelectronics and Advanced Materials 12 (2010) 505-510.