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Online since: July 2014
Authors: Shui Xing Zhou, Guang Qiang Yang, Jin Yu Liu, Yang Zou
Considering the construction difficulty, stability performance and material consumption, recommendationsfor selecting the structural type of pier with height between 100 m~200 m were given.
The materials of main girder and pier chose concrete C60 and C50 respectively, and unit weight of both chose 26kN/m3.
Journal of Highway and TransportationResearch and Development, Vol.8, pp.46-51, 2011.
Journal of Highway and TransportationResearch and Development, Vol.8, pp.80-82, 2011.
China Railway Science, Vol.26, No.4, pp.32-36, 2005.
The materials of main girder and pier chose concrete C60 and C50 respectively, and unit weight of both chose 26kN/m3.
Journal of Highway and TransportationResearch and Development, Vol.8, pp.46-51, 2011.
Journal of Highway and TransportationResearch and Development, Vol.8, pp.80-82, 2011.
China Railway Science, Vol.26, No.4, pp.32-36, 2005.
Online since: July 2008
Authors: Yu Cheng Ding, Chang He Li, Shi Chao Xiu, Guang Qi Cai
The workpiece material is 40Cr steel has the surface roughness
mean values of Ra=0.60μm after grinding.
The effectively active abrasive number is lower for 5% concentration of abrasive so as to attain smaller material removal.
Cai: Journal of Northeastern University, Vol.26(6)(2005), p.578-581 [3] C.
Xiu: Key Engineering Materials, Vols. 329 (2007), p. 527-532
Hou: Advanced Materials Research, Vols. 24-25 (2007) p. 337-342 (a)Cross correlation function curve Fig. 9 The cross correlation curve which measured perpendicular veins on grinding surface and abrasive jet finishing surface (b)Cross correlation coefficient curve τ/mm CCF(τ)/μm τ/mm ρxy(τ)
The effectively active abrasive number is lower for 5% concentration of abrasive so as to attain smaller material removal.
Cai: Journal of Northeastern University, Vol.26(6)(2005), p.578-581 [3] C.
Xiu: Key Engineering Materials, Vols. 329 (2007), p. 527-532
Hou: Advanced Materials Research, Vols. 24-25 (2007) p. 337-342 (a)Cross correlation function curve Fig. 9 The cross correlation curve which measured perpendicular veins on grinding surface and abrasive jet finishing surface (b)Cross correlation coefficient curve τ/mm CCF(τ)/μm τ/mm ρxy(τ)
Online since: May 2011
Authors: Xiao Juan Gao, Yan Sun
The model is 3-D and consists three types materials of concrete, steel bar and soil.
Pile is model as linear elastic material.
In this model, the material parameters and pile geometry parameters are the same to the model above.
Acknowledgement This paper subsidized by the PH.D fund of Henan University of Science and Technology(09001210) and education department of henan province(2010B560005) References [1] GAO Xiaojuan,LIU Fengjun,LI Yuehui and ZHU Xiangrong.
Chinese Journal of Rock Mechanics and Engineering, 22(3):494-499 (in Chinese)
Pile is model as linear elastic material.
In this model, the material parameters and pile geometry parameters are the same to the model above.
Acknowledgement This paper subsidized by the PH.D fund of Henan University of Science and Technology(09001210) and education department of henan province(2010B560005) References [1] GAO Xiaojuan,LIU Fengjun,LI Yuehui and ZHU Xiangrong.
Chinese Journal of Rock Mechanics and Engineering, 22(3):494-499 (in Chinese)
Online since: August 2013
Authors: Ying Pang, Ya Xin Wang
Introduction
With the improvement of material life and spiritual pursuit, people need more in living condition.
An ecologic residential quarter needs to reduce the pavement area of the ground and increase the use of materials which have good water permeability.
The key of roof material is selection of the upper soil and the plant.
Upper soil should choose clean natural or artificial material with high porosity, small density and available for plant growth.
Journal of Natural Science of Hunan Normal University, 2, 90-92
An ecologic residential quarter needs to reduce the pavement area of the ground and increase the use of materials which have good water permeability.
The key of roof material is selection of the upper soil and the plant.
Upper soil should choose clean natural or artificial material with high porosity, small density and available for plant growth.
Journal of Natural Science of Hunan Normal University, 2, 90-92
Online since: February 2013
Authors: Fan Rang Kong, Yu Feng Wei, Fang Liu, Fei Hu
The structure design of the mini underwater robot
Yufeng Wei1,a, Fang Liu2,b, Fei Hu3,c, Fanrang Kong4,d
1,2,3,4School of Engineering Science, University of Science and Technology of China,
Hefei Anhui 230027, China
awyf1541@mail.ustc.edu.cn, bliufang1@mail.ustc.edu.cn, cfeihu@mail.ustc.edu.cn, dkongfr@ustc.edu.cn
Keywords: Underwater robot; Structure design; Resistance calculation.
Nevertheless, the shape and material adopted depends on two main factors: the first one is designed depth of the underwater robot, the other one is the payload of the underwater robot.
Through considering comprehensively, we selected 5454-aluminum alloy as the main material of the main cabin, and PC (polycarbonate) engineering plastic as the material the half-ball shell. 3.3 Stress calculation of the main cabin The robot will deform when squeezed by the seawater.
Although when water pressure increased to a certain value which still within the strength of material, the main cabin lost symmetry due to the overlarge deformation.
Ming-Xue, "Dynamics model of underwater robot motion control in 6 degrees of freedom," Journal of Harbin Institute of Technology, vol. 12, 2005
Nevertheless, the shape and material adopted depends on two main factors: the first one is designed depth of the underwater robot, the other one is the payload of the underwater robot.
Through considering comprehensively, we selected 5454-aluminum alloy as the main material of the main cabin, and PC (polycarbonate) engineering plastic as the material the half-ball shell. 3.3 Stress calculation of the main cabin The robot will deform when squeezed by the seawater.
Although when water pressure increased to a certain value which still within the strength of material, the main cabin lost symmetry due to the overlarge deformation.
Ming-Xue, "Dynamics model of underwater robot motion control in 6 degrees of freedom," Journal of Harbin Institute of Technology, vol. 12, 2005
Online since: August 2009
Authors: Guo Zhong Cao, Helen Lai Wah Chan, C.L. Choy, Y. Wang, X.Y. Zhou, Yun Zhou, G.Y. Wang
Cao
2,b
1
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong SAR, China
and Materials Research Center, Hong Kong SAR, China
2
Department of Materials Science & Engineering, University of Washington, Seattle, 98195, USA
3
Institute of Marine Materials Science and Engineering; Shanghai Maritime University, Shanghai
200135, P.
Additionally, it is interesting to note that, although originally the development of the SrTiO3/Si heterostructure was mainly motivated by the potential use of SrTiO3 as a high-k material, the present research has actually shown the SrTiO3/Si structure can be a good reference for integration of other perovskite oxide devices on Si.[9] The heterostructure of BST/high-R silicon for tunable microwave devices is one good example.
Zhang, Journal of Applied Physics Vol. 105 (2009), p.034112 [3] H.
Additionally, it is interesting to note that, although originally the development of the SrTiO3/Si heterostructure was mainly motivated by the potential use of SrTiO3 as a high-k material, the present research has actually shown the SrTiO3/Si structure can be a good reference for integration of other perovskite oxide devices on Si.[9] The heterostructure of BST/high-R silicon for tunable microwave devices is one good example.
Zhang, Journal of Applied Physics Vol. 105 (2009), p.034112 [3] H.
Online since: May 2007
Authors: Wing Bun Lee, Chi Fai Cheung, Ling Bao Kong, Sandy To
Currently, the achievement of a super mirror finish still relies
largely on the experience and skills of the machine operators through an expensive trial-and-error
approach when new materials, new design of surfaces or new machine tools are used
[4]
.
Although some attempts have been made in the development of machining models to simulate surface topography of a machined surface [5] , most of them do not take into account the effect of the cutting strategy, machining kinematics, cutting theories, material science, machine tool wear, 3D slide axis errors and temperature and thus fails to achieve optimization of the surface quality.
SURFACE TOPOGRAPHY SIMULATION MODEL FREEFORM TOOL PATH SIMULATOR OUTPUT SUB-MODEL 3D tool locus Tool interference Simulated 3D surface Surface form and roughness evaluation Machining Kinetic Model Vibration Cutting force Tool wear Other factors Workpiece Information Materials Geometry Others Reference Data Metrology Information Machine Tool Metrology Workpiece Metrology INPUT SUB-MODEL Machining Parameters Feed rate Spindle speed Others Step distance Machining Tool Geometry Tool nose radius Swing distance Guide axisOthers 4 Fig. 4 Optimization model Fig. 5 Freeform measurement path plan Freeform Surface Evaluation.
The successful development of the integrated platform can help to identify to optimal cutting conditions and cutting strategy for different work materials without the need for costly trial and error cutting tests.
Cheung: International Journal of Mechanical Sciences, Vol.43 (2001) No.4, pp.961-991
Although some attempts have been made in the development of machining models to simulate surface topography of a machined surface [5] , most of them do not take into account the effect of the cutting strategy, machining kinematics, cutting theories, material science, machine tool wear, 3D slide axis errors and temperature and thus fails to achieve optimization of the surface quality.
SURFACE TOPOGRAPHY SIMULATION MODEL FREEFORM TOOL PATH SIMULATOR OUTPUT SUB-MODEL 3D tool locus Tool interference Simulated 3D surface Surface form and roughness evaluation Machining Kinetic Model Vibration Cutting force Tool wear Other factors Workpiece Information Materials Geometry Others Reference Data Metrology Information Machine Tool Metrology Workpiece Metrology INPUT SUB-MODEL Machining Parameters Feed rate Spindle speed Others Step distance Machining Tool Geometry Tool nose radius Swing distance Guide axisOthers 4 Fig. 4 Optimization model Fig. 5 Freeform measurement path plan Freeform Surface Evaluation.
The successful development of the integrated platform can help to identify to optimal cutting conditions and cutting strategy for different work materials without the need for costly trial and error cutting tests.
Cheung: International Journal of Mechanical Sciences, Vol.43 (2001) No.4, pp.961-991
Online since: May 2015
Authors: Zhi Yu Wen, Li Chen, Yi Ming Lei
Typical micromachining was used to fabricate resonators’ microstructure (resonant planar spring).The chosen materials decreased the production cost and simplified the fabrication process.
The measured results of two electromagnetic vibration energy harvesters which were assembled by two different shape planar springs with the same kind of material and the testing coil are different.
Roundy, On the effectiveness of vibration-based energy harvesting, Journal of intelligent material systems and structures, vol. 16, pp. 809-823, 2005
Beeby, Self-powered autonomous wireless sensor node using vibration energy harvesting[J], Measurement Science and Technology, 2008,19(12),125202
Roy, A micro electromagnetic generator for vibration energy harvesting, Journal of Micromechanics and Microengineering, vol. 17, pp. 1257-1265, 2007
The measured results of two electromagnetic vibration energy harvesters which were assembled by two different shape planar springs with the same kind of material and the testing coil are different.
Roundy, On the effectiveness of vibration-based energy harvesting, Journal of intelligent material systems and structures, vol. 16, pp. 809-823, 2005
Beeby, Self-powered autonomous wireless sensor node using vibration energy harvesting[J], Measurement Science and Technology, 2008,19(12),125202
Roy, A micro electromagnetic generator for vibration energy harvesting, Journal of Micromechanics and Microengineering, vol. 17, pp. 1257-1265, 2007
Online since: January 2012
Authors: Sheng Hua Lv, Yan Fen Ma, Di Li
Starch is a kind of rich, biodegradable, environmentally friendly and renewable resource, and is a important raw material made for green chemicals.
It’s one of the main research directions that modified starch is used as green chemical material now and in the future.
Lv and the Graduate Innovation Fund of Shaanxi University of Science and Technology.
Reactions with water insoluble phenolic substrates,” Journal of Molecular Catalysis B: Enzymatic, vol. 44, no. 3-4, pp. 144-148, February 2007
Zhou, “Studies of Acrylamide Polymerization Initiated by Horsradish Peroxidase-Catalyzed System, ”Journal of Functional Polymers, vol. 17, no. 1, pp.81-86, March 2004
It’s one of the main research directions that modified starch is used as green chemical material now and in the future.
Lv and the Graduate Innovation Fund of Shaanxi University of Science and Technology.
Reactions with water insoluble phenolic substrates,” Journal of Molecular Catalysis B: Enzymatic, vol. 44, no. 3-4, pp. 144-148, February 2007
Zhou, “Studies of Acrylamide Polymerization Initiated by Horsradish Peroxidase-Catalyzed System, ”Journal of Functional Polymers, vol. 17, no. 1, pp.81-86, March 2004
Online since: August 2013
Authors: Xiao Hui Zhang, Lian Ju Zhao, Hao Xiang He, Rui Hua Di, Wei Ming Li
From determining the mechanical properties of structure materials, verifying the calculation of the individual components of beams, plates and columns to establishing a computational theory of complex structural system, all depends on the research of structural experiment [1].
Experiment Ontology is the most important component of OBSE, and it mainly contains: Experiment, Condition, Project, Person, Organization, Load Strategy, Measure Strategy, Structural Component, Material, Equipment[5].
Constructing virtual domain ontologies based on domain knowledge euse[J].Journal of Software,2003,14(3):350-355
Journal of Tsinghua University (Sci & Tech) [J], 2012,52(1):47-54
Bei Jing: China Science and Technology Press, 2008
Experiment Ontology is the most important component of OBSE, and it mainly contains: Experiment, Condition, Project, Person, Organization, Load Strategy, Measure Strategy, Structural Component, Material, Equipment[5].
Constructing virtual domain ontologies based on domain knowledge euse[J].Journal of Software,2003,14(3):350-355
Journal of Tsinghua University (Sci & Tech) [J], 2012,52(1):47-54
Bei Jing: China Science and Technology Press, 2008