Search results

JOURNAL OF MECHANICAL ENGINEERING, Vol.45 No.10 Oct. 2009 172-179
CHENG Qiang, LIU Guangbo, LIU Zhifeng1.An Identification Approach for Key Geometric Error Sources of Machine Tool Based on Sensitivity Analysis.
JOURNAL OF MECHANICAL ENGINEERING.
Use of reverse engineering method for rapid product development.
Computers & Industrial Engineering, Volume 35, Issues 1–2, October 1998, Pages 21-24 [12].

Study on Reasonable Feature of Compaction Loess with Air Porosities Jing Yang1,2,a, Linghao Wang1,b, Fuli Ma1,c and Xiaohong Bai1,d 1 College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China 2 Department of Civil Engineering, Taiyuan Institute of Electrical Engineering, Taiyuan 030013, Shanxi, China a yangjingd@126.com, b bjwdxz@126.com, c mafuli0309@163.com, d bxhong@tyut.edu.cn Keywords: compaction loess, degree of compaction, dry density, air porosity, water content.
Based on the material composition, density, water content controlled by the standard, backfill compacted in layer is called compacted backfill.
In this paper, the engineering mechanical properties were researched and the air porosity is proposed to be used as an additional indicator for compaction quality control on the condition of the degree of compaction meeting the requirements, the rationality of air porosity is discussed.
Loess is not the perfect filling material, but it was normally backfilled to reduce the project cost.
Zhang: Discussion of superdense of compaction degree in highway engineering test, Highways and Transportation in Inner Mongolia, 2 (2006) 21-22

Temperature Zoning of Libya Desert for Asphalt Mix Design Hassan Awadat Salem1,a,Djordje Uzelac2,b, BojanMatic3,c 1Department of Civil Engineering, Novi Sad University, Serbia 2Department of Civil Engineering, Novi Sad University, Serbia 4Department of Civil Engineering, Novi Sad University, Serbia a has712002@yahoo.co.uk, b uzelac.djordje@gmail.com c,bojan.matich@gmail.com Keywords: Superpave, Temperature Zoning, Performance Grade, Penetration Grade, SHRP, LTPP Abstract: The current asphalt binder specifications in Libya are based on the Penetration Grade: penetration test is performed at 25°C.
Introduction From October1987 through March 1993,the Strategic Highway Research Program (SHRP) conducted a research effort to develop new ways to specify, test, and design asphalt materials [1].
One of the key aspects of the SUPERPAVE is the development of the performance based binder specifications termed as Performance Grade (PG) asphalt.
Among these, models for the prediction of high and low pavement temperatures based upon the air temperature data was established during the Strategic Highway Research Program (SHRP).However, later SHRP established the Long Term Pavement Performance (LTPP) program to support a broad range of pavement performance analysis leading to improved engineering tools to design, construct, and manage pavements.
School of Civil and Environmental Engineering (NIT), National University of Science and Technology (NUST), Master Thesis

The main reflector is made of aluminum whose material density is .
It indicates that the uncertainties of the antenna structure parameters have smaller effect on the reflector region than that on the beams, which agrees with the experience in the engineering.
Song: Communications in Numerical Methods in Engineering.
Elishakoff: Computer Methods in Applied Mechanics and Engineering.
Nielsen: Journal of Engineering Mechanics.

Comparative Study of Creep and Stress Relaxation Behavior for 7055 Aluminum Alloy Lihua Zhan1, a, Yanguang Li1,b, Minghui Huang1,c , Jianguo Lin2,d 1 School of Mechanical and Electrical Engineering, Central South University, Changsha, China 2 Department of Mechanical Engineering, Imperial College London, UK ayjs-cast@mail.csu.edu.cn, bliyanguang131@126.com, cMeeh@mail.csu.edu.cn, dJianguo.Lin@imperial.ac.uk Keywords: 7xxx aluminum alloy; age forming; creep; stress relaxation Abstract.
Therefore a new forming technique is a key for 7xxx aluminum alloys to be used to manufacture complex-shaped panel parts.
Then a multi-step fitting process using the experimental data from creep ageing tests was used to obtain the material constants, detailed introduction was shown in Ref. [11, 12].

Velocity Distribution for the Flow of the Second-order Fluid with Variable Coefficients in Concentric Annulus with Isometric Ring Slots on the Inner Cylinder Haiqing Cuia, Jun Heb, Xingliang Songc Enhanced Oil and Gas Recovery Key Laboratory of Ministry of Education, Northeast Petroleum University, Daqing 163318, China acuihaiqing969@msn.com, bjlythejun@sohu.com, csongxingliang1980@126.com Keywords: the second-order fluid with variable coefficients; isometric ring slots; laminar flow; velocity distribution Abstract: The governing equations of flow of the second-order fluid with variable coefficients through concentric annuli with isometric ring slots on the inner cylinder under the cylindrical coordinate system were established.
Where =998.1, 0.6456, which is liquidity index, 0.1772, which is consistency coefficient, -1.4972, 0.4669, which are material constant of first normal stress difference coefficient, , 0.036m, 0.030m.
Cui, et al., Numerical simulation of fluid in concentric annuli with ring slots on the inner cylinder, Proceedings of the 21st National Conference on Hydrodynamics and 8th National Congress on Hydrodynamics and the Cross-Strait Conference on Ship and Ocean Engineering Hydrodynamics, pp. 271-275, 2008(in Chinese)
Flow field of flow of fluid through separate layer injection allocation of concentric annuli with isometric ring slots on the inner cylinder, Asia-Pacific Power and Energy Engineering Conference, vol. 3, 2010.

Electrode Classification and Retrieval Using Supported Vector Machine Hua-chang WANG1,a, Zhu-qing LV1,b, Zhi-gang LI1,c 1State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China awhc@hust.edu.cn, blzqing422@163.com , czgli2@hust.edu.cn Keywords: SVM, 3D model retrieval, electrode classification, CNC Machining Process Abstract.
IEEE International Conference on Data Engineering, 2009, pp.1633-1640
Journal of Hydrologic Engineering, Vol.4(1999), pp.223-239

A Novel Design in Micro-Air-Vehicle: Flapping Rotary Wings WU Jianghaoa,ZHOU Chaob and ZHANG Yanlaic School of Transportation Science and Engineering, Beihang University, Beijing, PR China a buaawjh@buaa.edu.cn, b zcqh821@163.com, c zhangyanlai@buaa.edu.cn Keywords: MAV; flapping rotary wings; lift force; aircraft design Abstract.
To lessen the model’s weight, the shaft and sleeve all use carbon fiber material.
How to control MAVs and make it robust in limited volume is a key problem that must be solved before MAVs put in operation.
Proceedings of SPIE: The International Society for Optical Engineering, Vol. 5388, Sept. 2004, pp. 190–201. doi:10.1117/12.536681 pp.190-201 [5] Information on http://aero.stanford.edu/mesicopter/ [6] C.

Nazaratul Ashifa2 1Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia. 2Malaysia Nuclear Agency, 43000 Bangi, Selangor, Malaysia a*khaironie@gmail.com, bmasturah@eng.ukm.my Keywords: solvent extraction, light rare earth, D2EHPA, extraction percentage Abstract.
Therefore, separation and recovery of individual elements or groups of REs from major sources (mineral monazite, xenotime, and bastnasite) and other secondary sources (residues from processing activities, waste rock, sludges and scrap material) has to be both economically and environmentally significant, to accommodate the critical demand in a rapidly growing and developing world.
The key objectives of the present study were to separate these metal ions and determine the effects of D2EHPA concentration on the extraction efficiency of the elements.

A Charge Storage Based Enhancement Mode AlGaN/GaN High Electron Mobility Transistor Hui Wang1,2,3,a, Lingli Jiang1,3,b, Ning Wang1,3,c, Hongyu Yu1,3,e* and Xinpeng Lin1,3,d 1Department of Electrical and Electronic Engineering, Southern University of Science and Technology, No 1088, Xueyuan Rd., Xili, Nanshan District, Shenzhen, Guangdong 518055, China 2School of Electronic Science and Engineering, Southeast University, No 2, Sipailou Rd., Xuanwu District, Nanjing, Jiangsu 210096, China 3Shenzhen Key Laborary of The Third Generation Semi-conductor, No 1088, Xueyuan Rd., Xili, Nanshan District, Shenzhen, Guangdong 518055, China awangh3@sustc.edu.cn, bjiangll@sustc.edu.cn, cwangn3@sustc.edu.cn, d1010611095@qq.com, eyuhy@sustc.edu.cn Keywords: GaN; HEMT; charge storage; enhancement mode Abstract.
Introduction AlGaN/GaN high electron mobility transistor (HEMT) is a promising candidate for high voltage, high frequency and high temperature power devices owing to its outstanding material advantages [1].