Search results

Introduction Brass and its alloys are the materials which are widely used in friction parts of machines, as bearing liners, bushing, etc… Properties such as high strength and ductility, fatigue strength, wear resistance, etc [1].
Are necessary for these materials, and it is important to understand microstructure change at the work interface.
For ductile materials, such as brass, plastic deformation plays an important role in different atmospheres.On the other hand, before the wear particle is produced from the rubbing interface, it grows as the transfer particles.
The materials studied were a CuZn brass alloy and steel AISI 1045 with the following chemical composition in weight percent, respectively: for the pin 64% Cu, 0.25% Si, 0.11% Al, 0.21% Fe and the balance Zn; for steel disc Fe + 0.45% to 0.51% C, 0.5% Mn, Si < 0.1, P < 0.035% .
Bay, Welding Journal. (2005). 73

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.

., 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

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

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.

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.

Journal of Sichuan Grassland, 2006, (6): 12-15.
Pratacultural Science, 2004, 21(2):30-34.
Science, 2011(28), 04.
Beijing: Science Press, 2011.
Chinese Journal of Grassland,2006,28(2):71-78.

Vinitha3, Joseph Daniel4 1,3Division of Physics, SAS, VIT-Chennai, 2 Division of Chemistry, SAS, VIT-Chennai 4School of Mechanical and Building Sciences, VIT-Chennai *Corresponding Author: caroline.ponraj@vit.ac.in Keywords: BiFeO3, nanoparticles, direct blue dye, photocatalyst, visible light irradiation Abstract.
Materials and Methods: The precursor Bismuth(III) nitrate hydrate, Puratonic(99.999%), Iron (III) nitrate nonahydrate (98%+) and fuel Citric acid monohydrate 99% were procured from AlfaAesar.
Hitachi S-4800 model of High Resolution –Scanning Electron Microscope (HR-SEM) was used in imaging the synthesized materials.
Hameed, Journal of Hazardous Materials, 170, (2009)520
[24] Manuel Bibes and Agnès Barthélémy, nature materials,7 , (2008)425

Introduction Nowadays, aluminum alloy sacrificial anode materials have been widely used in anti-corrosion protections for all kinds of ships, oil platforms and subsea pipelines [1], because it is light, cheap and with large capacity.
Because of the excellent comprehensive performance in seawater and no need of heat treatment, Al-Zn-In series of alloying became one of the most popular materials for aluminum alloy sacrificial anode [4-7].
Gurrappa, Cathodic protection of cooling water systems and selection of appropriate materials, J.
Chen, Study of low voltage sacrificial anode materials, J.Mater.
Ijsseling, General Guidelines for Cormsion Testing of Materials for Marine APPlieations.