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Online since: May 2012
Authors: Hong Pu Kang, Jian Lin, Bin Hu
The low relaxation prestressing steel strands of 22mm diameter and 1´19 shares were used as cable materials, and the length was 5000mm with lengthening anchorage by resin capsules.
(3) The irrationality of original supporting parameters Through the field investigation, the paper pointed out that the low pre-tension of the original support system and the irrationality of auxiliary support components were the main reasons for the failure of roadway support, concrete analyses could be described as follows. ① The low support strength The material of the bolts used at Hongmiao Colliery was 20MnSi, and the diameter was 18mm.
High-strength and low relaxation prestressing steel strands of 22mm diameter and 1´19 shares were used as cable materials, and the length of cable was 4300mm with combined anchorage of resin capsules and cement.
While the high prestress and intensive bolt-cable support system pointed out that the prestress was the key parameter, the overlap area of high compressive stress could be formed in the loose and soft surrounding rocks by substantially enhancing prestress and diffusing prestress with the help of auxiliary support components.
Chinese Journal of Rock Mechanics and Engineering, vol. 29 (2010), p. 649.
Online since: November 2017
Authors: Andrei G. Kotousov, Ian H. Brown, Frank J. Barbaro, Walter Costin, Reza Ghomashchi, Olivier Lavigne, Valerie Linton
Barbaro3,g 1School of Mechanical Engineering, The University of Adelaide, South Australia, Australia 5005 2Energy Pipelines CRC, Wollongong, New South Wales, Australia 2522 3Barbaro and Associates, Wollongong, New South Wales, Australia 2522 awalter.costin@mcl.at, bolivier.lavigne@adelaide.edu.au, candrei.kotousov@adelaide.edu.au, dreza.ghomashchi@adelaide.edu.au, eian.brown@adelaide.edu.au, fvalerie.linton@epcrc.com.au, gbarbaro.associates@gmail.com Keywords: Microstructure; hydrogen embrittlement; mechanical properties; welding; EBSD.
Introduction Atomic hydrogen can be found in many materials and components, often introduced by manufacturing operations as well as due to environmental exposure.
An established method to investigate the contribution of specific microstructural constituents to the HACC susceptibility of the bulk material is to characterise their micro-fractographic behaviour [8].
It is in general found that the HACC susceptibility of a bulk material tends to increase with the increase of its strength (or hardness) and the decrease of its toughness [3].
Gutierrez, Key Eng.
Online since: January 2017
Authors: Ekaterina A. Gavrilenko, Alexander A. Biryukov
A promising area of the science and geo-engineering is to obtain nanomaterials that are safe in use, active absorb light in the visible range, have good efficiency, and economic continuity.
Nanodisperse titanium dioxide seems to be the most widely used material in photocatalysis, since it is chemically inert and exhibits minimal toxic effects towards living organisms [2, 3].
Thus, an increase in the service life of the material, an expansion of the range of absorbing light, and a change of the texture parameters such as porosity and particle size of the materials are achieved.
Thus, the use of TiOX in the synthesis of TiOX/CdS heterostructures can significantly affect the properties of the resulting material.
Svetlichnyi, Spectral-Luminescence Properties of Water Dispersions of CdS and Ag Nanoparticles Stabilized with Na2SiO3, Key Eng.
Online since: July 2012
Authors: Jin Shui Yao, Xi Jun Sun, Xiao Ning Zhang
Synthesis of Chiral Polysiloxane via Hydrosilylation between Synthesized Hydrogen-Containing Polysiloxane and a Chiral Unsaturated Amide Xiaoning Zhang1,2, a, Jinshui Yao1,2,b and Xijun Sun1,2,c 1School of Material Science & Engineering, Shandong Polytechnic University, Daxue road, Jinan250353, China 2Shandong Provincial Key Laboratory of Performing and Testing Technology of Glass & Functional Geramics aemail: 0524102801@163.com, bemail: yaojsh@spu.edu.cn, cemail: shuang.yu.1986@163.com Keywords: Hydrogen-containing polysiloxanes, Chiral polymers, Viscosity-average molecular weights, Active hydrogen content, N-[(1S)-1-phenylethyl]prop-2-enamide, Hydrosilylation Abstract.
It is well known, with chiral carbon atoms or asymmetrical factors existed, chiral polymers are regarded as a new kind of functional polymers, which are commonly used in chiral separation[5,6], optoelectronic materials[7], liquid crystal[8], etc.
Experimental Materials.
Online since: October 2013
Authors: Grzegorz Peruń, Jan Warczek, Rafał Burdzik
Warczek, Method of assessing the impact of material properties on the propagation of vibrations excited with a single force impulse, Archives of Materials and Metallurgy 57(2) (2012) 409—416
Uhl (Eds.), Structural Health Monitoring II, Key Engineering Materials 518 1-15 (2012)
Online since: October 2014
Authors: Han Mei Hu, Ya Jing Shi, Yan Hua Zhang, Ya Ling Fu
Study on Power Supply of the Feeder Terminal Equipment Hanmei Hu1, Yajing Shi2,a * , Yanhua Zhang3, Yaling Fu4 1School of Electrical Engineering and New Energy, Three Gorges University, Yichang443002, Hubei Province, China aemail:476150180@qq.com Keywords: feeder terminal unit (FTU); power supply; super capacitor; storage battery; current transformer (CT) Abstract.
Years of operation condition shows that the power source of FTU is the most faulty component as well as the key factor to affect its stability and reliability.Therefore, the reliability of the power supply of FTU is a difficult point of distribution network automation system.
Super capacitor capacitance is proportional to the surface area and is inversely proportional to the plate spacing.Super capacitor electrode is widely used ,and its carbon electrode is composed of the porous carbon material.The porous structure of the material make the surface area of the positive and negative plates reach more than 2000m2/g.Additionally, the interval between the electric double layer is very short, which(<10-10m) is shorter than a conventional capacitor of the film material can achieve.
(5)Environment friendly.Materials used in super capacitor is environment friendly and also won't produce toxic or harmful substances in the process of work
Online since: September 2013
Authors: S. Ningshen, K. Sukuki, S. Ukai, M. Sakairi
Introduction The selections of appropriate materials are one of the key objectives in Generation IV nuclear reactors development.
The proposed future fusion energy systems require a wide range of high performance materials in a hostile environment [1-5].
Several studies have been devoted towards the development of ODS materials for the above applications.
Hence, from a practical point of view, this may be desirable for the structural materials to be used in a nuclear reprocessing plant.
This study was carried out to evaluate and compare the feasibility of using ODS steel materials in different PUREX reprocessing environment.
Online since: December 2012
Authors: Guo Chen Zheng, Zhu Jun Tian, Jian Zheng Li, Li Wei, Ajay Kumar Jha, Jing Bo Guo, Hai Feng Lu, Yu Jin
The performance characteristics of anaerobic baffled reactor (ABR) fermentation system ZHENG Guo-chen1, a , TIAN Zhu-jun1, LI Jian-zheng2, WEI Li 2, AJAY Kumar Jha2, GUO Jing-bo3, LU Haifeng 4, JIN Yu2 1 Songliao River Basin Water Resources Protection Bureau, Changchun 130021,China 2 State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China 3 School of Civil and Architecture Engineering, Northeast Dianli University, Jilin 132012, China 4College of Water Resource and Civil Engineering, China Agriculture University, Beijing100083, China, awasaizgc@163.coml Keywords: Wastewater; Anaerobic baffled reactor (ABR); Fermentation; Bio-hydrogen Abstract.
Materials and methods The ABR was contained four equal rectangular compartments with 40 cm length, 10 cm width and 50 cm height.
It was beneficial to hydrogen production of HPA, but to get rid of the low partial pressure, it was far from enough to only involve the engineering control measures.
Online since: July 2012
Authors: Chang Xin Nai, Zhen Chong Wang, Lu Dong, Yong Zhu
Measurement System for Soil Complex Resistivity based on LabVIEW Yong Zhu 1, 2, 3,a, Zhenchong Wang 1, Changxin Nai 3, Lu Dong 3 1 School of Mechanical Electronic and Information Engineering, China University of Mining and Technology, Beijing 100083 China 2 School of Physics and Electronics, Fuyang Teachers College, Fuyang 236041, China 3 Research Institute of Solid Waste Management, Chinese Research Academy of Environmental Sciences, Beijing 100012, China a zhuyong@cssci.info Keywords: Soil; Complex Resistivity; LabVIEW; Virtual Instrumentation Abstract.
Frequency dispersion less than 10 kHz mainly has a tie with induced polarization (IP) effect caused by electrochemistry, and IP frequency dispersion effect is speculated still to be observable if frequency is reduced to below 10 Hz according to the law of spectral induced polarization and the existing actual materials [16].
From equations (2), the key to measurement was the amplitude ratio and phase difference between voltage V and current I.
Engineering Geology, 1999, 54: 43~53
Engineering Geology, 2001, 60:361~369
Online since: June 2010
Authors: Yu Lan Tang, Jing Xiang Fu, Xing Guan Ma, Hai Biao Wang, Yu Hua Zhao
Study on short-cut nitrification aerobic granular sludge cultivation and carbon-nitrogen removal Fu jingxing1, a , Tang Yulan*1,b , Ma Xingguan1,c , Zhao Yuhua1,d , Wang Haibiao1,e 1 Municipal and Environment Engineering Institute, Shenyang Jianzhu University, Shenyang, China a Hj_jxf@sjzu.edu.cn,b Tyl98037@163.com,cmaxingguan@163.com, dzyh088@sina.com,e lvhome@163.com Keywords: aerobic granular sludge; short-cut nitrification; seed sludge; carbon-nitrogen removal Abstract.
MATERIALS AND METHODS Experimental equipment and operation.
It can be seen, the need for sludge treatment in the majority of the cost will be saved if the granular sludge technology can be applied to practical engineering eliminates.
Acknowledgment This project is supported by National Water pollution control and management of major special science and technology ( NO. 2009ZX07208-002-005) research project of liaoning province department of education (No 20060692) and by the college key laboratory open foundation of liaoning province (No.
Biochemical Engineering Journal. 2005, 27(1): 45-52
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