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Introduction The tensioned cable-membrane structure is a flexible space structure system which is formed by cable and membrane materials working together after forming.
Fig. 1 Schematic diagram Finite element analysis method of friction contact between cable and membrane The cable is meshed with 30 Link10 elements in ANSYS,and membrane surface is meshed with some shell41 triangular plane stress shell elements.The friction contact between the valley cable and membrane surface is simulated by contact elements.Because friction contact is a irreversible complex loading process,incremental iterative method for solving is applied[6].There are three contact states:STAT=0 or 1,elements are not closed of far or near contact;STAT=2,elements are sliding contact;STAT=3,elements are adhesive contact[7].Friction coefficient is introduced and the following assumptions are made: Small strain, complying with HOOKE’s law;Membrane is an orthotropic elastic material, deformations of material always maintain the vertical axis;Considering friction contact between cables and membranes.
The friction contact between the valley cable and membrane surface is simulated by node-surface contact elements in ANSYS,detailed steps are as follows:Establishing planar projection geometric model;Setting virtual cable and membrane elastic moduluses;Establishing element types,real constants,material properties and initial pre-tensions under virtual cable and membrane elastic moduluses;Meshing geometric model;Selecting node-surface contact elements,and inputting friction coefficient;Establishing edge conditions and enhancing displacements according to elevations of edge control points between true structures and planar projection models;After the first form-finding updating nodes coordinates,setting enhancing displacements of edge control points zero;Restoring true elastic moduluses,resetting true cable pre-tension and membrane pre-tension; Performing the first equilibrium iteration solution;Re-updating nodes coordinates and equilibrium iteration solution until results tolerance is up
Journal of Zhejiang University: Science,12(2003),p.672-682 [3] Kai Liu, Zhe Wang, Weicheng Gao, et al: Research on Sliding Cable of a Cable-membrane Structure (In Chinese).
Liaoning Technical University, 12(2006) [7] Xiangxin Liu, Xianyi Meng: ANSYS Fundamentals and Applications Tutorial (In Chinese).Bei Jing: Science Press, 2006 [8] Xiaohua Zhu, Zhixiang Yu, et al: ANSYS Examples of Advanced Engineering Finite Element Analysis of Selected (In Chinese).Bei Jing: Publishing House of Electronics Industry, 2004

Reprinted from the Harvard International Law Journal, Vol.14, No.3, 1973
(In Chinese) [21] SHEN Jin-sheng, XU Yi-fei, LEI Li., China Soft Science, 1997, (7):113-119.
(In Chinese) [23] WANG Wei, Journal of Southeast University, 2001, 31(3): 1~6.
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A solar drying system designed on the principles of convective heat flow, constructed from local materials was employed in drying yam (Dioscorea Alata).
The solar air heater was constructed using a single layer of 4 mm thick glass(of transmittance of about 0.63) for wave lengths in the range 0.2- 2.0 Um and opaque to wave length greater than 4.5Um) as glazing material.
Simulation of available solar energy in Bangladesh and computer simulation and optional design of indirect rational conventional solar drying system research report of the European Commission Postgraduate Fellowship Department of Agricultural and Environmental Science, University of Newcastle upon Tyre, NUITRU, UK (1994)
Appraisal study of drying rates of pepper, tomato and okro: Nigerian Journal of Solar Energy Volume 8 (1989), p. 165.

But these kinds of composite materials were usually prepared by powder metallurgy technology.
The coating materials were sprayed on the surface of 45 carbon steel by plasma spray equipment of DH1080.
The grooves in Fig. 7a may indicate the washing out of those materials.
Yuan: Materials for Mechanical Engineering, Vol. 26(2002), p.18-21.
Sac: Journal of Materials Processing Technology, Vol. 175(2006), p. 376-381

Among them, Zaitian Ke of China Academy of Railway Sciences did a 1:4 model investigation for the macro-axis force pile underpinning of Shenzhen Metro.
The constitutive model for material was linear elastic and elastic constant Pa.
Dead weight of upper structure achieved by defining the density of material and the gravity acceleration (9.8).Floor live load was 3.5kN/m2.In view of calculating settlement deformation, the normal value of load must be converted into permanent value,which multiplied by the factor of 0.5.Partial safety factor was no longer considerred.
Paper for Railway Science Academy.2003 [8] Hai Sun.Theoretical research and application for pile foundation prestressed balance underpinning [D] (In Chinese).Paper for Tongji university.2001 [9] Xiaogang Xiong,Jianqiong Jiang.
Design procedures and application for underpinning structure composed of piles and beams [J](In Chinese).Journal of South China University Of Technology.2004,32(1):85-89 [11] Weixing Feng, Wenzhong Han,Weili Ding.

It is assumed that the surface layer of the shotcrete is homogeneous and the material is isotropic, linear and elastic.
Tab.1 Mechanical properties of soil Tab.2 Concrete beam structure and mechanical properties of cells[5,6] The features of the soil value The acceleration due to gravity 18KN/m3 The internal friction angle 19° The cohesion 27KPa Expansion angle 10° The bulk modulus 3.55MPa The modulus of shear deformation 1.18MPa it is also assumed that the structure unit of soil nailing cable is made of homogeneous, linear and elastic material, the feature of the cable structure unit is as shown in table 3.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51068026),the National Natural Science Foundation of China (51178122) ,the National Natural Science Foundation of China (41162009) and the Natural Science Foundation of Tibet Autonomous Region.
[4] Changwen Chen, Yong-jian Liu and Weicheng Wang:The Application of Composite Soil Nailing Walls in a Deep Foundation Pit (Journal of Guangdong University of Technology, China 2009)（In Chinese）,p.11

Jingshui Huang1, a, Yue Wen2,*, Asheng Cao, Haisong Li and Qi Zhou 1 Room 209, Shengtai Building, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China. 2 Room 301, Mingjing Building, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
Materials and methods 2.1 Aerobic sequencing batch reactors (SBRs) The laboratory experimental system consists of three parallel SBRs (total and effective volume: 4.0L/each, respectively), operated at 25°С & 35°С & 55°С.
Ganczarczyk: Water Quality Research Journal of Canada Vol. 33 (1998), p. 565 [11] X.
Yu: Environmental Science & Technology Vol. 41 (2007), p. 4620 [12] W.
Luo: Environmental Science & Technology Vol. 44 (2010), p. 4355 [14] X.

This project collects a schematic diagram of the main attractions in Qishan National Forest Park (2010), as well as the promotional materials（2010）from Nanyu state-owned forestry centre.
Journal of Fujian College of Forestry,2013
Jiangsu science and Technology Press,2008
Science Press,1998 [14] GB／T 18OO5— 1999, China forest park landscape resources grade evaluation
International Society for Environmental Information Sciences 2010 Annual Conference, 2010: 465–475.

Coupling Coordinative Degree of Tourism-Economy-Environment system——Take Resource-based Cities in Shanxi Province as a Case Peng Guo1, 2, a, Suocheng Dong1, b* 1Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; 2University of Chinese Academy of Sciences, Beijing 100049, China aguop.12b@igsnrr.ac.cn, bdongsc@igsnrr.ac.cn Keywords: resource-based cities; tourism; regional economy; ecological environment; coupling coordinative degree Abstract.
Materials and methods Study area.
Acknowledgements This study was financially supported by the basic national science & technology specific projects (2007FY110300), Natural Science Foundation of China (41271556).
Yang, Research on development conditions and modes of industrial tourism in resource-based cities, Journal of Arid Land Resources and Environment, 10 (2009) 188-193

., Dolgoprudny 141700, Russian Federation 2Lomonosov Moscow State University, 1-51 Leninskie Gory, Moscow 119991, Russian Federation 3Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 Semenov av., Chernogolovka 142432, Moscow region, Russian Federation 4European Synchrotron Radiation Facility (ESRF), 6 rue Jules Horowitz, Grenoble 38043, France 5Institut Makromolekulare Chemie, Leibniz-Institut für Polymerforschung, 6 Hohe st., Dresden 601069, Germany 6Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361, 15 Jean Starcky, Mulhouse F68057, France amelnikov.al.pe@gmail.com, bmartin.rosenthal@esrf.fr, cerdmann@ipfdd.de, dkiriy@ipfdd.de, eivanov.da@mipt.ru Keywords: organic semicoductor, X-ray scattering, ultrafast chip calorimetry, structural reorganization.
Materials and Methods P3EHT was synthesized from 3-iodo-5-bromo derivative of the 3-(2′-ethyl)hexylthiophene using isopropyl magnesium chloride catalyst.
Acknowledgments The authors greatly thank the Ministry of education and science of the Russian Federation (contract № 05.605.21.0188 from 3 December 2019 (RFMEFI60519X0188)) for financial support.
Mitrofanova, Recrystallization and secondary crystallization in polymers, Polymer Science USSR. 28 (1986) 1011-1017
Wang, Nature of the double melting peaks of regioregular poly(3-dodecylthiophene), European Polymer Journal. 99 (2018) 284-288