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Online since: February 2013
Authors: Jie Hu, Huai Yun Zhao
Defining the response error ε as (5) In equation (5), Xr(ω) is the local response PSD produced by excitation, Xt(ω) is the local target response PSD, nc is the number of concerned local DOFs, the less numerical value of ε means the better approximation of response spectrum. 2 Numerical Simulation Fig.1 is the finite element model, it is supported by 4 columns, and the model parameters are listed in Tab.1 Fig.1 Finite element model of plate Tab.1 Model parameters of plate Geometry parameters(mm) Material parameters Length of plate 1200 Young`s modulus 210e3Mpa Width of plate 1000 Density 2700kg/m3 Thickness of plate 4 Poisson ratio 0.3 Length of column 100 Radius of column section 5 4 local DOFs are chosen as the concerned objection, these DOFs located at the top node (connecting column and plate) of 4 columns, vertical direction.
Sponsored by Science and Technology Foundation of CAEP(2011B0102034) Reference: [1] Cao Hui, Lai Ming.
Journal of Building Structures, Vol.21, No.3 June,2000:41-45
Online since: February 2012
Authors: Xiang Qiang Zhong, Yan Hong Yang
Beginning from selecting product material, using methods of optimization, guiding people to develop the beneficial environment consumption habits and ways, harmony relations among the “Product - Human-Environment” are constructed. [1] Hydraulic transmission has some advantages, such as: smooth transmission, noiseless and labor saving, which can be applied to bicycle transmission mechanism.
Acknowledgements This work was financially supported by the Mechanical Manufacturing & Automation Anhui Provincial Key Subject, Anhui University Provincial Science Research Project (KJ2011B015).
International Journal of Product Development 2005; 2:207-35
Online since: May 2009
Authors: F. Battaglia-Brunet, S. Coulon, Catherine Joulian, Dominique H.R. Morin
Material and Methods Bioreactors.
Baranger: Journal of Applied Microbiology Vol. 93 (2002), p. 656 [5] C.
Santini, J.G. and Hering, D.K.: Science Vol. 306 (2004), p. 455
Online since: May 2012
Authors: Chun Yi Cui, Zhong Tao Wang, Shou Long Chen
As can be seen from the graph case 1 amplitude was significantly greater than the case 2 and case 3, the maximum acceleration peak value of ground surface acceleration values for the case 1 is 0.814 m/s2 Conclusion Based on the Newmark-β step time integration method, using dynamic finite element analysis theory, this paper analyzes in detail and discusses free field response of stress and deformation under the horizontal earthquake considering material nonlinearity and geometric nonlinearity.
Acknowledgements This work was financially supported by National Natural Science Foundation of China through the grants 50809009 and 50909014 as well as by the Fundamental Research Funds for the Central Universities.
Chinese Journal of Geotechnical Engineering, 2005, 27(6): 646-651
Online since: August 2011
Authors: Hong Cai Wu, Jian Zhang, Hong Jie Wang
The material cost and the weight of gear box can be decreased simultaneously.
Journal of Mechanical Transmission Vol. 29-1 (2005), p.19 [5] Bu Zhonghong, Liu Geng, Wu Liyan, etl.
Mechanical Science and Technology for Aerospace Engineering, Vol. 27-11 (2008), p.1365 [6] Chang Lehao, Liu Geng, Wu Liyan, etl.
Online since: October 2011
Authors: Huai Shi Bo, Hua Kuan Liu
Grouting tube manufacture map Grouting material is chosen according to principle as follow: Use single cement paste when water doesn’t exists in the pebble layer.
References [1] Yang BenWei, Grouting reinforcement technique on Sandy pebble watery stratum, Engineering Science, 2010 (12):56-57
[3] Zhai JieQun, Jia Jian, Xie XiaoLin, Practice of Partition Wall in the Building Protection Projects near Deep Excavation, Chinese Journal of Underground Space and Engineering, 2010, 6(1)
Online since: September 2013
Authors: Ting Ting Jiang, Hong Jing Han, Hong Jun Wu, Bao Hui Wang, Jia Lu, Hai Yu Wang
Analysis on toxic and hazardous substances of Polymer Surfactants used in Oilfields Tingting Jiang1,a,Jia Lu1,b,Haiyu Wang2,c,Baohui Wang1,d,Hongjing Han1,e and Hongjun Wu1,f 1 Lab of New Energy Chemistry and Environmental Science, College of Chemistry & Chemical Engineering College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, P.R.China 2 The First Oil Company of Daqing Oilfield Company Limited ajiangtingting82@163.coml, blu-jia2008@163.com, cwhy5834@163.com, dwangbaohui60@163.com, ehongjing_han@163.com, fhjwu1979@163.com Keywords: Polymer surfactant; Toxic and hazardous substances; Oilfield Abstract.
From the gas phase spectra can be seen, retention parameters from the retained polymer surfactant A dry powder and water to confect polymer surfactant A extraction of material value and retention time and solvent and retention time is basically the same.Therefore,there is no organics in polymer surfactant, or organic pollutant concentration is too low, below the instrument detection limit, and therefore are not detected.
New technology, improved economics boost EOR hopes[J].Oil Gas Journal, 1996,(April 15):39-61
Online since: October 2014
Authors: Jun Zhou, Xi Cheng Zhao, Qiu Li Zhang, Xin Zhe Lan, Zhe Yang
Experimental Coal sample.The low rank coal was used for the experimental material, hand picking removed coal gangue.
Acknowledgments This project was financially supported by the Scientific Research Program of Shaanxi Provincial Education Department (Program No. 12JK0583) and the Yulin Planning Project of Science and Technology.
:Journal of Fuel Chemistry and Technology Vol.33, No.4 (2005)
Online since: September 2013
Authors: Ji Xin Li, Fan Yu
Immune Algorithm for The Singular Sample of Near Infrared Spectroscopy YU Fan1,a, LI Ji-Xin1,b 1 School of Computer Science and Engineering, Xi'an Technological University, Xi'an, China ayffshun@163.com,bli.jixin0916@163.com Keywords: Near infrared spectroscopy.
Using PLS model could predict properties of measured material.But the accuracy of results is mostly depended on quality of prediction models.And quality of models is determined by the samples which are used to build models.Therefore, it is one of research hotspots that removing singular sample correctly in NIS preprocess field.
Journal of Chromatography . 1995 [4] YANG Hui-hua, Tan Feng, WANG Yi-Ming, LUO Guo-AN. lsomap-PLS Nonlinear Modeling Method for Near Infrared Spectroscopy[J].
Online since: September 2014
Authors: Xiao Wen Wang
The research of Sensor application status Wang Xiaowen Weifang University of Science and Technology, Shouguang Shandong, 262700, China.
Metal internal structure and the principle of resistance strain gauge It consists of substrate material, metal wire strain or strain foil, insulation protection and lead parts.
Journal of instruments and meters, 2006, 27 (1) : 3.
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