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Online since: September 2013
Authors: Li Na Hao, Wen Lin Chen, Zhen An, Chao Qun Xiang, Chen Yang Liu
The Design of High Power LED Headlamp WenlinChen1,a,Zhen An2,b,Chaoqun Xiang2,c,ChenyangLiu2,d,LinaHao2,e 1College of Resources and Civil Engineering , Shenyang, Liaoning Province of China, 2College of Mechanical Engineering and Automation, Shenyang, Liaoning Province of China achenwenlin@mail.neu.edu.cn, b981221164@qq.com, c23476614@qq.com, d963411809@qq.com, ehaolina@me.neu.edu.cn Keywords:LED,ANSYS,LTC3783 constant current drive circuit,Heat dissipation Abstract.With the continuous development of LED(Light-Emitting Diode) manufacturing technology, the high power white LED is gradually applied in the field of all kinds of lighting .But with working time increasing of LED chips, their junctions’ temperature continue increasing, which lead to decrease light-emitting efficiency and reliability of LED chip, and even be failure.
Online since: October 2014
Authors: Yun Tian Teng, Xi Zhen Wang, Cai Hua Li, Xiao Yong Fan, Xing Xing Hu
Take the high performance acquisition systems usually used in civil seismic network and mobile observations for example, REFTEK-130dB (USA) is 135dB@100SPS, Gularop (UK) is 130dB@200Hz, EDAS-24IP, which is made by domestic Gangzhen Instrument & Equipment Co.
[3] Li T T,Yuan Z L.Therotical Design of High Resolution Seismic Data Acquisition System.Science Technology and Engineering,2011,11(13):2915-2919
[18] Lin Jun,DevelopmentofHigh-ResolutionGeophysical Instrumentation for Engineering and Environmental Investigations,International Workshop on High-Resolution Geophysics, 1997, Tucson,USA.
Online since: January 2015
Authors: Qiang Li, Shao Xiong Li, Yu Gu
Analysis of Motor Vibration Frequency by The Change of The Base Anchor Inclined Plate Length Yu Gu1,*,a, Qiang Li1,c and Shaoxiong Li1,b 1School of Civil Engineering, Beijing Jiaotong University, Beijing, China ayugu@bjtu.edu.cn, b11121115@bjtu.edu.cn, c12121028@bjtu.edu.cn Keywords: motor, vibration frequency, numerical simulation, modal analysis, base anchor Abstract.
The Calculated Results and the Measured Results Steps Calculated result Measured result Error value[%] 1 330.36 339.35 -2.65 2 717.23 769.79 -6.83 3 999.15 946.22 5.60 4 1200.2 1202.97 -0.23 5 1735.3 1803.56 -3.78 6 2265.6 2065.68 9.6 From the finite-element analysis result and the calculative result in table 3, we can see that the error value between the calculative result and the measured result in variable step is -2.65%, -6.83%, -0.014%, -0.23%, -3.78%, and -9.6%, respectively; The maximum error value between the calculative results and the measured results in the first 6 steps is 9.6%, which can meet the engineering requirements, so the finite-element model is reliable.
Online since: May 2011
Authors: Xiao Mei Wan, Wei Qun Cao, Tie Jun Zhao
Influencing parameters analysis of Chloride Threshold Value on Reinforcements Embedded in Concrete Weiqun Cao1,a, Xiaomei Wan1,b and Tiejun Zhao1,c 1School of Civil Engineering, Qingdao Technological University, Qingdao, China aqdcaoweiqun@163.com, bwanxiaomeiqj@126.com, cztjgp@263.net Keywords: Corrosion; Durability; Chloride; Threshold value Abstract.
Conclusions From the present literature review and the experiment results, the following major conclusions are drawn: Consultant engineers still base their decisions on long-term experience from existing structures, of which most were built with ordinary Portland cement.
Online since: July 2012
Authors: Yong He Xie, Gao Sheng Yang
The Fatigue Strength Assessment for Hull Structure of Steel Fishing Vessel Gaosheng Yang1,a, Yonghe Xie2,b 1Fishery School & Maritime School, Zhejiang Ocean University, Zhoushan, China, 316000 2Schools of Naval Architecture and Civil Engineering, Zhejiang Ocean University, Zhoushan, China, 316000 aygs2008@126.com, bxieyhtoccs@sina.com Keywords: Ocean trawler; Fatigue strength assessment; Finite element analysis;Hull structure Abstract.
According to the engineering experiences and reference the fatigue strength assessment calculation rules of other mature ship types, and considering the structure characteristics of steel fishing vessel, during the operating time, alternating loads induced by waves on the ship's central area amplitude is the largest, so the high-risk areas of fatigue about the steel fishing vessel main occurred in the middle of the ship for cabin area too, this area of the wave vertical bending moments and horizontal bending moments are the largest, there are also higher local deformation stress at midship, and the longitudinal bending stress level of longitudinal component hull is higher.
Online since: December 2010
Authors: Long Fei Wang, Mu Yu Liu
References [1] Virlogeux M:Structural Engineering International, 2001,11(1):61-82
[2] Combault J., Pecker A., Teyssandier J. and Tourtois J.: Structural Engineering International, 2005,15(1):22-27
[3] Chun Zhang and Xiaodong Liu:Highway, 2002,6:98-100.In Chinese [4] Meixin Ye and Fei Jin: Journal of East China Jiaotong University, 2006,23(4):13-21.In Chinese [5] Jiaying Pan, Guozhen Zhang and Qinguo Chen: Journal of Civil Engneering, 2000,33(1):5-14.In Chinese [6] A.M.S.Freire, J.H.O.Negrao and A.V.Lopes:Computers and Structures, 2006,84:2128-2140 [7] Code for Design of Concrete Structures [S].
Online since: October 2012
Authors: Meng Wang, Zuo Lian Wu, Xiao Chun Liu, Li Na Zhang
Economic Analysis of Cascade Utilization of Mine Water and Recycled Water of Electric Power Plant Zuolian Wu1, a, Meng Wang1, b, Xiaochun Liu1, c and Lina Zhang2, d 1Water Conservancy & Civil Engineering College of Shandong Agricultural University, Taian, Shandong, China 2 Mechanical & Energy Engineering College of Tongji University, Shanghai, China awzlok000@sina.com, baicon.wm@126.com, cnewliuchina@126.com and dlina880419@163.com Keywords: mine water; recycled water of power plant; cascade utilization of energy; economic analysis; emission reductions Abstract: The scheme selection and system design of the regional central air conditioning system of Xiezhuang Coal Mine were presented.
Online since: December 2012
Authors: Qi Xia Liu, Xin Zou, Jun Yan Deng
Architectural Design of Green Campus Qixia Liu 1, 2, a, Xin Zou1,b and Junyan Deng 1,c 1Civil Engineering and Architecture College,Henan University of Technology, Henan Zhengzhou 450052,China 2School of Civil Engineering and Architecture, Wuhan University of technology Hubei Wuhan 430063,China aliuqixia65@163.com, byinjiaxinzouxin@sina.com, c903202329@qq.com Keywords: Ecological Campus, Architectural design, Function zoning, Green Building Abstract.
Online since: June 2011
Authors: An Ping Pan
A Constructive Genetic Algorithm for the P- median Location problem of Typhoon Emergency Shelter in China Coastal Rural Areas Pan An-ping College of Architectural and Civil Engineering, Wenzhou University, P.R.China panaping@sohu.com Key words: Genetic algorithm, Emergency shelter, Typhoon Disaster, Site selection.
[9] Hakim S L:Operation Research, 1964, No.12, pp. 450-459 [10] H.C.Huang, P.Lin, S.M.Lo:Journal of Basic Science and Engineering, 2004(Supplement), pp. 62-66(in Chinese) [11] Hanif D S, T.B.C., Antoine G H.
Online since: December 2013
Authors: Zhi Min Wu, Yun Guo Zhang, Xi Wu
Experimental Investigation on the Shrinkage and Creep Performance of Self-Compacting Lightweight Concrete Yunguo Zhang1, a, Zhimin Wu2,b Xi Wu2,c 1School of Civil & Safety Engineering of DaLian JiaoTong University, Dalian Liaoning, PR China 2State Key Laboratory of Coastal & offshore Engineering, Dalian university of technology, Dalian Liaoning, PR China aZyg-ncwu@163.com, bWuzhimin@dlut.edu.cn, cWuxi41@126.com Keywords: self-compacting lightweight concrete; experimental study; workability; shrinkage; creep Abstract: Several experimental investigations were conducted on the autogenous shrinkage and creep performances of two types of designed self-compacting lightweight concrete (SCLC).
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