Search results

Simulating research on rod string’s gyro effect caused by eccentric rotation in circular tube Shimin Dong1, a, Wansheng Zhang1, b, Guohong Chai1, c, Mingming Xing1, d and Hong Zhang1, e 1Mechanical Engineering College, Yanshan University, Qinhuangdao 066004, PR China aysudshm@163.com, bzhangwansheng2008@126.com, cchaiguohong99@yahoo.com.cn, dxingmingmging2009@126.com, ehongtaiyang1987@163.com Key words:Slender rod string; Vertical circular tube; Eccentric rotation; Simulating model; Gyro effect Abstract: Based on the influences of eccentrical rotating inertial centrifugal force and axial force on the rod string’s lateral bending deformation, the finite beam element model of rod string’s bending deformation is established.
(2)The rod string is composed of hundreds of rods which are homogeneous material connected by hundreds of couplings.
(3) The elastic potential energy of the unit in matrix form can be expressed as (4) Where, is strain matrix ; is elastic matrix ; is the matrix of assembly of load vectors; is the length of the unit; is axial tension of the unit ; is angular velocity of the rod string ; is cross sectional area of the unit; is the density of the unit’s material. , are first order differential coefficient of [Nv] and [Nw].

For the complexity of the problem and the shortcomings of existing research, the paper puts forward a new complex multi-objective and multi-constraint method to solve the fine-pitch gear optimization problem by using variable-grain strategy[9] from coarse to fine and stepwise to refinement after considering the impact of the key parameters on the noise and fine-pitch tooth profile.
The material is 30CrMnT, the accuracy class is 7 and the cycle-index of driving gear is 1010.
[5] Liang Shang-Ming, Luo Wei, Li Hua, et al: Journal of Sichuan University (Engineering Science Edition), Vol. 36(2004), p. 81-84
[7] Zhong Zhuang: Automobile Technology & Material Vol. 3(2007), p.41-44, in Chinese

To stain and observe “dead” cells and tissues – The problem of specimens being too thick to provide good images is here routinely solved by mechanically reducing the thickness of the original biological materials.
Acknowledgements The author thanks Dr Robert Aitken, School of Biological Sciences, Glasgow University, Scotland for provision of facilities; and Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering (YR2011007).

Impacts of pH and Electrolyte on Cadmium Desorption Characteristics in Contaminated Soil Su Chen1, a, Lei Chao2, b, Lina Sun1, c and Tieheng Sun1,d 1 Key Laboratory of Regional Environment and Eco-Remediation, Shenyang University, Ministry of Education, Shenyang 110044, China 2 Liaoning Academy of Environmental Sciences, Shenyang 110031, China aemail: mailchensu@yahoo.com.cn, bemail: mailchaolei@yahoo.com.cn, cemail: mailsydx@yahoo.com.cn, demail: thsun@iae.ac.cn Keywords: Cadmium, Electrolyte, pH, Desorption, Soil Abstract.
Materials and Methods Test Soil.
Wang, Northwest Water Resources & Water Engineering (1996) 35-40 (In Chinese)

Effects of Anolyte Concentration on Removal of Fluorine from Contaminated Soil by Electrokinetic Treatment Ming Zhoua, Shu-fa Zhub and Ya-na Liuc Chemical Engineering and Pharmaceutics College, Henan University of Science and Technology, Luoyang, 471003, China aaxore@163.com, bzhushufa1975@126.com, cliuyana2010@126.com Keywords: Anolyte concentration, Fluorine, Electroosmosis, Electromigration Abstract.
Materials and methods Contaminated soil sample and its characterization Cultivated surface soil (0–20 cm) used in this study was sampled near an aluminium smelting plant located Xinan County, China's Henan province.
Acknowledgments This study was financially supported by the Opening Fund of State Key Laboratory of Environmental Geochemistry (NO.SKLEG8008).

Application and Study of Fuzzy Neural Network Theory Based on Takagi-Sugeno Model to Thermal Error Modeling on NC Machine Tool Zijian Liu1, a , Zhimin Yu1, b , Siming Li1, c,Yandi Ai1, d 1State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China a zijianliu@hnu.edu.cn, b 113726319@qq.com, c hunandaxuesm@163.com, d superayd@126.com Keywords:Takagi-Sugeno fuzzy inference, Thermal error prediction model,Fuzzy segmentation, Membership function, Fuzzy Neural Network Abstract.
Because of the difference of materials and structures, components are different in thermal capacity, thermal coefficient and thermal expansivity.
China Mechanical Engineering, 1997, 8(1) : 29- 33

The Mechanical Structure Design of Bionic Quadruped Walking Robot Shao-yong Cao1,a 1School of Mechanical Engineering and Vehicle, Zhuhai College of Bejing Institute of Technology, Zhuhai 519085, China alemonsayong2005@163.com Keywords: Bionic, Quadruped walking robot, Mechanical structure design, Pro/E solid modeling Abstract.
As seen from the Fig. 4, axis is adopted the formation of keys to fix it in shank, prevent their relative movement.
The robot usually works at some harsh wild environment, which has rock, ice, grass land and mud, adopting rubber material can absorb some of impact force at a certain extent.
The robot is made of lightweight aluminum alloy material.

Effects of potassium-dissolution microorganisms on surface properties of orthoclase and bioleaching Shoufa Zhan1,a , Ye Chen 1,b, Desi Sun 2,c 1School of Life Sciences; Jiujiang University; Jiujiang 332005; China 2 School of Chemistry & Chemical Engineering; Jiujiang University; Jiujiang 332005; China; azhanshoufa@126.com, bsundesi1215@yahoo.com, cbaohong102003@yahoo.com Key words: orthoclase, microorganism, bioleaching, adsorption, surface properties Abstract: The alternation of surface properties of orthoclase after biological conditioning with Bacillus mucilaginosus and Aspergillus niger was investigated by zeta potential and adsorption studies.
Materials and methods Mineral The natural orthoclase was purchased from Geological Specimens Plant of Zhejiang University in China, with high quality and showing few foreign inclusions under the microscope.

Research on Mechanical Property of Top Drive Casing Running Tool’s Slips Faguang Jiang1, a, Zheng Liang1, b, Guanghui Zhao1, c , Yonghong Yan2, d and Pan Wang2, e 1 Mechatronic Engineering College, Southwest Petroleum University, Chengdu, 610500, China 2 Baoji Oilfield Machinery Co., LTD, Baoji, 721002, China ajiangfg@126.com, bliangz_2242@126.com, cwy_zgh@yahoo.com.cn, dhys_ yyh@ bomco·cn, ewp2080@126.com Keywords: Slips, Shell Theory, Casing, Contact Mechanics, Finite Element Method Abstract.
The loads change from different structure or material of each casing, which also change as the varied depth of wells.
Combining specific casing, material of casing and depth of well, the stress can be calculated through Formula (4),(5),(6),(7).
Acknowledgments This work is supported by Key Laboratory of Oil and Gas Equipment from Ministry of Education (2006STS03) and Science Foundation of Southwest Petroleum University (2010XJZ151).

Fatigue Strength of Metals Containing Inclusions and Phase Inhomogeneity Hiroshi Matsuno1, a 1 Department of Mechanical Engineering, Sojo University, 4-22-1 Ikeda, Kumamoto, 860-0082, Japan a hmatsuno@mec.sojo-u.ac.jp Keywords: Plastic adaptation; Equivalent stress ratio; σw1/ σw2-type fatigue strength; Nonmetallic inclusions; Phase inhomogeneity; Scattering of fatigue strength.
Mukai: Key Eng.
Sci.: Databook on Fatigue Strength Metallic Materials, Elsevier Sci.(1996) [6] N.