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Online since: January 2013
Authors: Pei Ying Li, Yu Tian Pan, Qing Zhang Qin
This system reduces the manual mis-operations to the largest extent in fieldworks, provides a strong guarantee to the safe operations of DC power system, avoids personnel’s fatigue of commuting to the spot, saves a great deal of human resources, material resources and financial resources, improves personnel’s work efficiency.
References [1] Ning Ma, Li Chen, Xiaojun Wang, Wenwei Yang, “Remote Monitoring of Power Station,” JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY, Vol. 41, No.1, pp. 216–218, Jun. 2009
[3] Haidong Wang, Nan Yang, Guolong Zhang, “A Brief Analysis of DC System in Power Plants,” SHANDONG COAL SCIENCE AND TECHNOLOGY, No.4, pp. 91–92, Aug. 2008
[4] Xiaomei Lin, “The Implementation of DC Monitoring System in Substation,” SCIENCE & TECHNOLOGY INFORMATION, No.01, pp. 131, Jun. 2009
[6] Yu Yan, Zhongbin Su, Jiwei Sun, “Implement Plans of Microcomputer Monitoring System of Power Control in Transformer Substation,” HEILONGJIANG SCIENCE AND TECHNOLOGY INFORMATION, No.7, pp.29, Jul. 2007
References [1] Ning Ma, Li Chen, Xiaojun Wang, Wenwei Yang, “Remote Monitoring of Power Station,” JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY, Vol. 41, No.1, pp. 216–218, Jun. 2009
[3] Haidong Wang, Nan Yang, Guolong Zhang, “A Brief Analysis of DC System in Power Plants,” SHANDONG COAL SCIENCE AND TECHNOLOGY, No.4, pp. 91–92, Aug. 2008
[4] Xiaomei Lin, “The Implementation of DC Monitoring System in Substation,” SCIENCE & TECHNOLOGY INFORMATION, No.01, pp. 131, Jun. 2009
[6] Yu Yan, Zhongbin Su, Jiwei Sun, “Implement Plans of Microcomputer Monitoring System of Power Control in Transformer Substation,” HEILONGJIANG SCIENCE AND TECHNOLOGY INFORMATION, No.7, pp.29, Jul. 2007
Online since: May 2011
Authors: Qiang Huang, Ying Na Dong, Zhi Da Li
Field Monitoring of Surrounding Rock Stress and Rheological Analysis in Tunnel Construction
Qiang Huang 1,2, a, Yingna Dong 2, b and Zhida Li 1,c
1School of Transportation, Wuhan University of Technology, Wuhan,430063,China
2Dept. of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang,471003,China
a757882635@qq.com,b dongyn2000@sina.com,c zhidali@163.com
Keywords: Tunnel Construction, Bench Method, Surrounding Rock Stress, Field Monitoring, Rheological Analysis.
Table 1 The physical and mechanical indices of surrounding and supporting material E [GPa] μ γ[KN/m3] [°] C[MPa] Grade IV rock 6 0.32 20 30 0.60 C25shotcrete 25 0.25 23 C25reinfoced concrete 30 0.20 25 Φ22 rock bolt 190 0.3 79 Since the sensor starts work afte the excavation of upper bench, the sensor readings is the stress increment in following excavation steps.
[3] Yu Xuefu: New Concept of Rock Mechanics and Structure Excavates Optimization Design, Beijing, Science Publishing house,1995, in Chinese
[5] Li Zhida, Huang Qiang: Field Monitor of Surround Stress and Rheological Analysis in Tunnel Construction,Jouenal of Wuhan university of technology(transportation science &engineering), (2010.3) p. 129–133, in Chinese
[6] Huang Qiang, Li Zhida, Wu Yanzhen: Analysis on Surrounding Rock Stress in shallow-buried bias Tunnel, Natural Science Journal of Xiangtan University, 2010(1);25-29 [7] Yang Tingqing: Viscoelastic theory and application, Science Press, Beijing. (2004)
Table 1 The physical and mechanical indices of surrounding and supporting material E [GPa] μ γ[KN/m3] [°] C[MPa] Grade IV rock 6 0.32 20 30 0.60 C25shotcrete 25 0.25 23 C25reinfoced concrete 30 0.20 25 Φ22 rock bolt 190 0.3 79 Since the sensor starts work afte the excavation of upper bench, the sensor readings is the stress increment in following excavation steps.
[3] Yu Xuefu: New Concept of Rock Mechanics and Structure Excavates Optimization Design, Beijing, Science Publishing house,1995, in Chinese
[5] Li Zhida, Huang Qiang: Field Monitor of Surround Stress and Rheological Analysis in Tunnel Construction,Jouenal of Wuhan university of technology(transportation science &engineering), (2010.3) p. 129–133, in Chinese
[6] Huang Qiang, Li Zhida, Wu Yanzhen: Analysis on Surrounding Rock Stress in shallow-buried bias Tunnel, Natural Science Journal of Xiangtan University, 2010(1);25-29 [7] Yang Tingqing: Viscoelastic theory and application, Science Press, Beijing. (2004)
Online since: January 2010
Authors: Zhi Jun Ma, Yue Xin Han, Yi Min Zhu
Fig 3 Infrared spectra of Fuxin Power Plant coal Ash
3 Mechanism of fluoride removal of coal ash
The pulverized coal ash is take the silicon dioxide and the trioxide two aluminum as the
principal constituent one kind of volcanic ash material, has the porous structure, to be bigger than
the surface area, the surface energy to be high, and the surface has many materials and so on
aluminum, silicon, has the strong adsorptive capacity.
Fig.6 Roasting time to pulverized coal ash activation effect influence 6 Conclusion (1) Based on the pulverized coal ash modified principle, uses the sodium carbonate to take the activator, raw material is cheaply easy, very economical feasible, and further launches for it by other activators provides certain basis to the pulverized coal ash modified research
(2) Has determined the modified pulverized coal ash optimum condition: Na2CO3: SiO2 mole of ratio is 0.5; Time activation optimum temperature is 900 °C; Activation time is 60min; After fluorine when gets ready the materials the quantity activates the pulverized coal ash: The waste water mass ratio is 3:25; Mixing time is 2 h
Hubei Normal school journal (natural sciences version) 2003, No·4, Vol·23,68-70 [7] Yanxiang Liu etc.
Jianghan college newspaper (natural sciences version), 2002, 19(4): 80- 83 [8] Jialing Yang etc.
Fig.6 Roasting time to pulverized coal ash activation effect influence 6 Conclusion (1) Based on the pulverized coal ash modified principle, uses the sodium carbonate to take the activator, raw material is cheaply easy, very economical feasible, and further launches for it by other activators provides certain basis to the pulverized coal ash modified research
(2) Has determined the modified pulverized coal ash optimum condition: Na2CO3: SiO2 mole of ratio is 0.5; Time activation optimum temperature is 900 °C; Activation time is 60min; After fluorine when gets ready the materials the quantity activates the pulverized coal ash: The waste water mass ratio is 3:25; Mixing time is 2 h
Hubei Normal school journal (natural sciences version) 2003, No·4, Vol·23,68-70 [7] Yanxiang Liu etc.
Jianghan college newspaper (natural sciences version), 2002, 19(4): 80- 83 [8] Jialing Yang etc.
Online since: April 2015
Authors: Dominik T. Matt, Erwin Rauch, Patrick Dallasega
Matt1, 2, b and Patrick Dallasega1, 2, c
1Faculty of Science and Technology, Free University of Bolzano, Universitätsplatz 5, 39100, Bolzano, Italy
2Fraunhofer Italia Research s.c.a.r.l., Innovation Engineering Center (IEC), Schlachthofstrasse 57, 39100 Bolzano, Italy
a*erwin.rauch@unibz.it, bdominik.matt@unibz.it, cpatrick.dallasega@fraunhofer.it
Keywords: Manufacturing Networks, Mobile Factory, Distributed Manufacturing, Manufacturing Systems, Construction Industry
Abstract.
The JIT ideal is elimination of buffers (materials or time) and the achievement of one piece flow [4].
In the last years the concept of collaboration in collaborative networks has become an important topic in science and practice.
The advantages of this concept are various: long transports can be eliminated reducing the ecologic impact; parts for installation on-site can be produced JIT and on demand; reduction of organizational and planning effort for material logistics as well as reduction of buffer stocks at the fabrication shop and on-site.
Saniuk, Prototyping of acceptable variants of manufacturing networks, The International Journal of Transport & Logistics 12/1 (2012) 286-293
The JIT ideal is elimination of buffers (materials or time) and the achievement of one piece flow [4].
In the last years the concept of collaboration in collaborative networks has become an important topic in science and practice.
The advantages of this concept are various: long transports can be eliminated reducing the ecologic impact; parts for installation on-site can be produced JIT and on demand; reduction of organizational and planning effort for material logistics as well as reduction of buffer stocks at the fabrication shop and on-site.
Saniuk, Prototyping of acceptable variants of manufacturing networks, The International Journal of Transport & Logistics 12/1 (2012) 286-293
Online since: December 2010
Authors: R.J. Song, J.L. Niu, Dong Hai Chen
Ultra-precision machining methods includes conventional
methods such as machining and grinding and methods used of sound, light, electricity and other
energy for materials processing, as well as combined methods integrated a variety of processing
methods [1].Traditional processing methods is still the dominated method at present.
The NAM-820 ultra-precision CNC lathes uses the ultra precision aerostatic spindle which wins the first prize in National Science and Technology Progress Award with independent intellectual property rights to ensure the spindle rotation accuracy <0.05µm.
Ensure hardware and software conditions such as human and material resources to establish impeccable management systems and mechanisms.
Science and Technology Review[EB/OL]
Journal of Precison Engineering, 1989,11(4),p. 191-196
The NAM-820 ultra-precision CNC lathes uses the ultra precision aerostatic spindle which wins the first prize in National Science and Technology Progress Award with independent intellectual property rights to ensure the spindle rotation accuracy <0.05µm.
Ensure hardware and software conditions such as human and material resources to establish impeccable management systems and mechanisms.
Science and Technology Review[EB/OL]
Journal of Precison Engineering, 1989,11(4),p. 191-196
Online since: September 2013
Authors: Xing Qiang Zhang, Jian Yao
The philosophy is to transform the reinforced section into an equivalent section of a reference material [8].
(3) According to the material properties of Deng [9], Linghoff [3], Colombi [8], one can compute that k is between 2.42% and 5.60%, which means the increment of the elastic load carrying capacity was insignificant.
Acknowledgement The writers are grateful for the financial support received from the China's Ministry of Education (Project No: J20120118), the Science and Technology Hall of Zhejiang Province (Project Codes: 2011C31006) and the Ministry Department in Zhenjiang (the key disciplines in colleges and universities of Zhejiang province in the 12th Five-Year Plan, Project Codes: 2012-80-291).
Zhang: Journal of basic science and engineering, Vol. 17 (2009), p. 707.
Cadei: Construction and Building Materials, Vol. 20 (2006), p. 34
(3) According to the material properties of Deng [9], Linghoff [3], Colombi [8], one can compute that k is between 2.42% and 5.60%, which means the increment of the elastic load carrying capacity was insignificant.
Acknowledgement The writers are grateful for the financial support received from the China's Ministry of Education (Project No: J20120118), the Science and Technology Hall of Zhejiang Province (Project Codes: 2011C31006) and the Ministry Department in Zhenjiang (the key disciplines in colleges and universities of Zhejiang province in the 12th Five-Year Plan, Project Codes: 2012-80-291).
Zhang: Journal of basic science and engineering, Vol. 17 (2009), p. 707.
Cadei: Construction and Building Materials, Vol. 20 (2006), p. 34
Online since: September 2020
Authors: Tetiana Kalinina, Veronika Dumanska, Oleksandr Kalinin, Nataliya Sidorova
Materials and Methods.
A plan was drawn up and a methodology for conducting research in laboratory conditions was developed, the necessary equipment and materials were selected.
Kim, Development of Deflection Prediction Model for Concrete Block Pavement Considering the Block Shapes and Construction Patterns, Advances in Materials Science and Engineering, Article, 2016
Marchenko, Studies of Coatings From FEP with Corrugated Base from Toothed Elements of Pyramidal Shape on the Horizontal and Inclined Surfaces, Academic Journal.
Nur Hafizah, The Effect of Groove-Underside Shaped Concrete Block on Pavement Permanent Deformation, Jurnal Teknologi (Sciences & Engineering) 61:3 (2013) 7–14.
A plan was drawn up and a methodology for conducting research in laboratory conditions was developed, the necessary equipment and materials were selected.
Kim, Development of Deflection Prediction Model for Concrete Block Pavement Considering the Block Shapes and Construction Patterns, Advances in Materials Science and Engineering, Article, 2016
Marchenko, Studies of Coatings From FEP with Corrugated Base from Toothed Elements of Pyramidal Shape on the Horizontal and Inclined Surfaces, Academic Journal.
Nur Hafizah, The Effect of Groove-Underside Shaped Concrete Block on Pavement Permanent Deformation, Jurnal Teknologi (Sciences & Engineering) 61:3 (2013) 7–14.
Online since: February 2014
Authors: Michael G. Pantelyat, Mykola G. Shulzhenko, Elena K. Rudenko
This is why multiphysical numerical analysis of transient electromagnetic and thermal fields in 3D is an actual problem of modern science and engineering.
The rotor material is steel with electric conductivity of s = 0.5×107 S×m-1 and is assumed to be linear with a magnetic permeability of m = 100m0 [2].
All mentioned electrical and thermal material constants are assumed to be independent on temperature.
In the authors’ opinion, the described technique can be used in the case of interconnected solution of the electromagnetic and thermal problems when temperature dependences of all material constants are taken into account, too.
Pantelyat, Coupled electromagnetic, thermal and elastic-plastic simulation of multi-impulse inductive heating, International Journal of Applied Electromagnetics and Mechanics 9 (1998) 11-24.
The rotor material is steel with electric conductivity of s = 0.5×107 S×m-1 and is assumed to be linear with a magnetic permeability of m = 100m0 [2].
All mentioned electrical and thermal material constants are assumed to be independent on temperature.
In the authors’ opinion, the described technique can be used in the case of interconnected solution of the electromagnetic and thermal problems when temperature dependences of all material constants are taken into account, too.
Pantelyat, Coupled electromagnetic, thermal and elastic-plastic simulation of multi-impulse inductive heating, International Journal of Applied Electromagnetics and Mechanics 9 (1998) 11-24.
Online since: October 2013
Authors: Shan Liu, Zhi Qiang Wan, Yao Kun Wang
An Analysis Method of Static Aeroelastic Response with Nonlinear Aerodynamic Data on 3D Body‐surface Panel Element
Yaokun Wang1, a, Zhiqiang Wan1,b and Shan Liu1,c
1School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics
ayaokun@ase.buaa.edu.cn, bwzq@buaa.edu.cn, cliushan_632@sina.com
Keywords: static aeroelastic response, 3D body surface panel element, nonlinear aerodynamic forces, flight load
Abstract.
During the designing of A-380, Airbus first employed computational fluid dynamics(CFD) method to design and optimize the fuselage and eventually the drag of fuselage is reduced by about 2%; In the other hand ,more and more new materials and structures would be used, for example, the goal of designing Boeing-787 contains that: the oil consumption rate per seat should be reduced by 20%, in which about 8% is from the result of the adoption of advanced composite materials[1].
Science China, 54(3):741-748(in Chinese) [4] Zhang B C, Wan Z Q, Yang C, Static aeroelastic responses analysis based on 3-D aerodynamic forces[J].Engineering Mechanics,2011,28(7):217-222 [5] Wan Z Q, Deng L D, Yang C, et al.
Transonic AIC Weigh- ting Method using Successive Kernel Expansion. 46th AIAA /ASME/ ASCE/ASC Structures,Structural Dynamics & Materials Conference
Investigation on Transonic Correction Methods for Unsteady Aerodynamics and Aeroelastic Analyses.Journal of Aircraft, 2008:1890– 1903.
During the designing of A-380, Airbus first employed computational fluid dynamics(CFD) method to design and optimize the fuselage and eventually the drag of fuselage is reduced by about 2%; In the other hand ,more and more new materials and structures would be used, for example, the goal of designing Boeing-787 contains that: the oil consumption rate per seat should be reduced by 20%, in which about 8% is from the result of the adoption of advanced composite materials[1].
Science China, 54(3):741-748(in Chinese) [4] Zhang B C, Wan Z Q, Yang C, Static aeroelastic responses analysis based on 3-D aerodynamic forces[J].Engineering Mechanics,2011,28(7):217-222 [5] Wan Z Q, Deng L D, Yang C, et al.
Transonic AIC Weigh- ting Method using Successive Kernel Expansion. 46th AIAA /ASME/ ASCE/ASC Structures,Structural Dynamics & Materials Conference
Investigation on Transonic Correction Methods for Unsteady Aerodynamics and Aeroelastic Analyses.Journal of Aircraft, 2008:1890– 1903.
Online since: September 2016
Authors: Adriano Reggia, Fabio Macobatti, Cristina Zanotti, Fausto Minelli, Giovanni A. Plizzari, Sara Sgobba
Specialized materials such as High Performance Concrete (HPC) could represent a viable convenient solution for repairing, strengthening and retrofitting of RC structures as both structural capacity and durability can be refurbished.
Restrained shrinkage cracking, particularly significant in repaired structures where the existing concrete generates a considerable restraint against the free movement of the repair material, may represent a limit to the effective application of these materials.
Material Modeling.
Material Properties The substrates are made using a NSC class C25/30 according to Eurocode 2 [6].
Miltenberger, Shrinkage Cracking Characteristics of Concrete Using Ring Specimens, ACI Materials Journal, 100 (2003), 239-245
Restrained shrinkage cracking, particularly significant in repaired structures where the existing concrete generates a considerable restraint against the free movement of the repair material, may represent a limit to the effective application of these materials.
Material Modeling.
Material Properties The substrates are made using a NSC class C25/30 according to Eurocode 2 [6].
Miltenberger, Shrinkage Cracking Characteristics of Concrete Using Ring Specimens, ACI Materials Journal, 100 (2003), 239-245