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From the point view of functions, the part of periphery shell which protects the stability or existence of the system, but not exchanges materials and energy is called periphery wall; the part which exchanges materials and energy, but not protects the system is called periphery gate [1],[2],[15].
It can maintain the existence and development of the raw water system and the environment, and help to exchange materials and energy between the raw water system and the environment.
Meanwhile, it shall also coordinate the exchanging of materials between the environment and the system.
Journal of Shandong University of Science and Technology (Natural Science), 2006, (01). ( In Chinese) [6] Zang Xue-yun, Xie Xiang, Guan Zhong-liang.
Journal of Beijing Jiaotong University (Social Sciences Edition), 2008, (04). ( In Chinese) [8] Gau W L, Buchrer D J.IEEE Transactions on systems, Man, and Cybemetics, 1993

It become a hot topics of current research by using natural plant crystalline cellulose as PVA reinforcement fiber to develop a lightweight, high-performance, low-cost, fully biodegradable materials[3]。
In this study, bagasse cellulose microcrystal was prepared, bagasse microcrystalline cellulose/PVA composite film materials were prepared, and the thermal stability and mechanical properties of composite film were investigated.
Experiment Materials Bagasse cellulose microcrystalline, prepared by ourselves; PVA(degree of polymerization: 1750±50) was provided by Sinopharm Chemical Reagent Co., Ltd.
Sur: Journal of Applied Polymer Science Vol. 90(2003), p. 3208
Liu: Chinese Agricultural Science Bulletin Vol. 26(2010), p. 370

The process of synthesizing TiO2 nanostructure-based materials using the hydrothermal method generally uses nanoparticles as the precursor material because of the high titanium content.
The properties of the resulting material were also determined through the characterization of nanostructured materials.
Titanate nanosheets have the potential to be used as a precursor material to produce other nanostructured TiO2 materials.
Sun, “Natural titanium dioxide nanotubes,” Epitoanyag - Journal of Silicate Based and Composite Materials, vol. 72, no. 5, pp. 152–155, 2020, doi: 10.14382/epitoanyag-jsbcm.2020.25
Yoshikawa, “Use of high surface area TiO2 nanosheet in dye-sensitized solar cell,” Materials Research Society Symposium Proceedings, vol. 951, no.

Computational Method The program Materials Studio DMol3 from Accelrys is used in this study.
Sealy, The problem with platinum, Materials Today, 11 (2008) 65-68
Lee, Oxygen reduction behavior with silver alloy catalyst in alkaline media, Materials Chemistry and Physics, 45 (1996) 238-242
Bellino, Water-graphene environment modulated by coupled nanopore interplay, Materials Chemistry and Physics, 232 (2019) 382-386
Zhu, DFT Study on Intermetallic Pd–Cu Alloy with Cover Layer Pd as Efficient Catalyst for Oxygen Reduction Reaction, Materials, 11 (2018) 1 - 11

Dynamic Decision-making for Emergency Materials Dispatching Based on Fuzzy Demand[J].
China Safety Science Journal[J], 2010(5) [3] W Chang.
Journal of Natural Sciences Edition. 2011(4)
Journal of the Operational Research Society, 2004, 55(1): 43-53
European Journal of Operational Research, 3: 1177-1194

Marcel and Leif [5] developed a new technique for mesh repair tasks and accurate mesh based front tracking of deformable materials that split and merge.
KJCX201104011), Youth Fund of Beijing Academy of Agriculture and Forestry Sciences (No.
QN201110) and Science & Technique Program of Beijing (No.
Möller, A fast triangle-triangle intersection test, Journal of Graphics, GPU, and Game Tools. 2 (1997) 25-30
Held, ERIT-a collection of efficient and reliable intersection tests, Journal of Graphics Tools. 2 (1998) 25-44

The Glue-Concrete Interface of Bonded Anchors, Construction and building materials, 34(9). pp. 267 – 274, doi: 10.1016/j.conbuildmat.2012.02.030, ISSN 0950-0618, 2012
[4] Bažant, Z.P., Oh, B.H., Crack band theory for fracture of concrete, Materials and Structures, RILEM, 93 (16), pp. 155-177, 1993
Constitutive Equations for Engineering Materials, Vol. 2 Plasticity and Modeling.
Shear Design of Reinforced Concrete Beams, Slabs and Walls, Cement and Concrete Composites, 20, 455-464, Elsevier Science, 1998
Simulation of hydraulic fracturing of jointed rock”, 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF Dresden, Germany, 2010.

Journal of Minerals & Materials Characterization & Engineering, Vol. 9, No.1, pp.57-65, 2010
Materials Science and Engineering A 434 (2006) 207–217
[5] Joseph R.Davis et al, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials,Volume 2,Metals Handbook ,10th Edition 1990
International Journal of Machine Tools & Manufacture 45 (2005) 1178–1187
Journal of materials processing technology, 58(1996) 379-384.

Experimental Cementitious materials.
Carlson: American Soc Testing & Materials Proc, No.38( 1983), p.419-437 [2] B.Tremper and D.L.
Wang : China Building Materials Industry Publishing House, Beijing, China (2005) [7] Y.L.
Cai:Journal of Building Materials, Vol. 14(2011), p.834-838 [8] X.Chen, H.Q.
Qian: Journal of Building Materials, Vol.11 (2008), p.334-338 [10] R.Springenschmid, R.

Polymer matrix composites are widely used as bearing materials for heavy load applications.
Still fundamental knowledge about the wear mechanisms of these materials and the evolution in time of these mechanisms is lacking.
Due to differences between the static and kinetic coefficient of friction, restarting a tribological test means changing the original parameters of the material, resulting in possible differences in wear behavior of the two materials.
Villard, Composites Science and Technology, Vol. 62 (2002), 1433-1444 [3] M.Q.
Van Hemelrijck, H.Sol, Journal of Adhesion, Vol. 82(11) (2006), pp. 1033-1060