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Online since: July 2011
Authors: Yi Lin Chi, Xing Wu, Yi Du
Bearing Fault Diagnosis Based on Probability Boxes Theory and SVM Method Du Yi1, a, Chi Yilin2,b and Wu Xing2,c 1Institute of Technology, Kunming University of Science and Technology, Kunming Yunnan 650093, China 2Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China aduyi215@hotmail.com, byilinchi@kmust.edu.cn, ckm_wx@yahoo.com.cn Keywords: Rolling bearing; Probability boxes; Dempster Shafer Structure; Fault Diagnosis Abstract.
The one is the objective uncertainty from the time spatial variation, the material non-uniformity, etc., which is unable to change.
Selecting the appropriate training samples is a key in the actual system.
Online since: September 2003
Authors: D. Krüger, R. Kurps, Peter Formanek, G. Weidner
First, high dose oxygen implantation (followed by high temperature annealing) is a key method for producing high quality silicon-on-insulator structures [1,2].
where v denotes the local specimen thickness and V0 (t) the mean inner potential, which is related to the electron optical refractive index of the material.
Engineering, B12 (1992), p. 83, [5] L.
Online since: September 2011
Authors: Huai Wen Zhang, Hong Guo Dong, Wen Kang Wei
A project practice about the foundation treatment of a high-rise building with large space requirement at the ground floor Hongguo Dong 1, a, Wenkang Wei 2,b and Huaiwen Zhang 3,c 1 Xinxing-Baoxin Construction Corporation , Beijing 100026,China; 2 Mechanical and Architecture School, China University of Mining and Technology (Beijing), Beijing 100083, China; 3 Aviational Institute of Geotechnical Engineering(Beijing),Beijing 100098, China; alunwenzhuanyong1@sina.com, bweiwenkang1111@sina.com, czhanghuaiwe@sohu.com Keywords: Deep Foundation Pit,Foundation Treatment,CFG Pile Abstract.
Table 1 Layers’ parameters layer Litho logy of layer Thickness crossed by CFG piles [m] Physical parameter ②, ②1 Clayey silt layer,silty clay layer 2.8 qsik=55kPa ③, ③1 Fine medium sand layer 2.9 qsik=55 kPa ④ Cobble layer 8.0 qsik=70 kPa ⑤, ⑤1 Clayey silt layer, silty clay layer 4.8 qsik=60 kPa ⑥ Fine medium sand layer (design bearing stratum for CFG pile) 1.0 qsik=65 kPa qpk=1600 kPa At the beginning of design, whether the drilling tool can cross cobble④ layer and whether the design parameter is correct are the key and difficult points of this project.
Diameter of pile: 400mm Material and strength of the pile mass: Plain Concrete C20 Designed length of piles: 20.0m Pile arrangement: 1300mm×1300mm The foundation deformation is calculated based on isotropic homogeneous linear deformation theory recommended by ’Code for design of building foundation’[1].
Online since: December 2012
Authors: Hai Bin Yang, Peng Luo, Dun Tao Guo
A Steganalysis based on OC-SVM and two Clustering Methods Haibin Yang1,a, Duntao Guo1,b, Peng Luo1,c 1Key Laboratory of Network & Information Security under the Chinese Armed Police Force, Department of Electronic Technology, Engineering University of Armed Police Force, China a haibinyang@163.com, b duntaoguo@163.com, c peng.luo0208@gmail.com Keywords: Steganalysis, One-class Support Vector Machine, K-means, Stimulated Annealing Abstract.
The name and inspiration come from annealing in metallurgy, a technique involving heating and controlled cooling of a material to increase the size of its crystals and reduce their defects.
In this sense, steganalysis is actually a matter of pattern classification in which a key issue is how to select effective features.
Online since: October 2010
Authors: Hong Li, Xue Wen Yan, Qian Lai Sun, Zhi Yi Sun
Development of Automatic Control System for a Rolling Shear line Qianlai Sun a , Zhiyi Sun b, Xuewen Yan c and Hong LI d School of Electronic Information Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi, China a sql_sun@163.com, bsunzhiyi@263.net, c yxw_9@sohu.com, dlihongty@sina.com Keywords: Rolling shear line, Automatic control system, PROFIBUS-DP, Cut to length Abstract.
The rolling shear is of the key assistant equipment for medium and heavy plate mill.
According to different thickness and material of steel plate waiting for cutting, the clearance between blades of shear must be adjusted frequently.
Online since: May 2012
Authors: Shu Qin Liu, Zhao Liang Cheng, Wen Tao Yu, He Zhang Weng, Wen Shan Zhang
The analysis and implementation of the Double-Line maximum power point tracking method Zhao-Liang Cheng 1, a, Shu-Qin Liu1, b, Wen-Tao Yu1, He-Zhang Weng1, Wen-Shan Zhang1 1School of Electrical Engineering, Shandong University, No.17923, Jingshi Road, Jinan, China a chengzhaoliang@yahoo.cn , blshuqin@sdu.edu.cn Keywords: Photovoltaic (PV); Maximum power point tracking (MPPT); Double-Line method Abstract: First this paper analyzes the model structure and the output characteristics of the photovoltaic (PV) module, and then we get the output characteristic curve using the parameter sheet.
Introduction The maximum power point tracking control technology is one of the key technology in (PV) power system.
(2) refers to the diode current, which can be got from Shockley equation: (3) Whereis the diode reverse saturation current; D is the diode coefficient of diffusion; q=1.602* electron charge; is material band-gap energy (Si: 1.12ev, GaGs: 1.35ev); A is completion factor, (NS is the number of units in an array); shape factor; K= , Boltzmann's constant.
Online since: August 2017
Authors: Nikolaos E. Karkalos, Angelos P. Markopoulos
MARKOPOULOS1,b* 1National Technical University of Athens, School of Mechanical Engineering, Section of Manufacturing Technology, Heroon Polytechniou 9, 15780, Athens, Greece ankark@mail.ntua.gr, bamark@mail.ntua.gr Keywords: cutting fluid, coolant, nanofluids, abrasive processes, heat induced phenomena Abstract.
Varga, Possibility of reducing environmental load in hard machining, Key Eng Mat 496 (2012) 205-210
Horvath, Effect of the workpiece material on the heat affected zones during grinding: a numerical simulation, Int.
Online since: September 2011
Authors: Zhen Rong Lu
The Hoist of Mine Improvement and Design of Brake System Study Zhenrong Lu Petrochina Jilin oilfield company underground engineering company jiangbei fracturing sand factory, Jilin, China luchangel@163.com Keywords: mine; elevator; braking system; improvement; expert system Abstract.
Introduction Mine hoist as the main equipment of coal ascension, and responsible for ascension coal, deliver material and lifting personnel.
Key Technology.
Online since: November 2011
Authors: Xiao Jiao Yu, Bing Hua Yao, Hai Ling Hao, Jian Zhang, Gang Zheng
Desulfurization of Fuel Oils by Extraction with Ionic Liquids Xiaojiao YU1,a, Hailing HAO2,b,Jian ZHANG1,c,Gang ZHENG1,d,Binghua YAO1,e 1Faculty of Sciences,Xi’an University of Technology,Xi’an710048,China. 2 Institute of Chemistry and Chemical Engineering , Henan Institute of Science and Technology , Xinxiang, Henan453003,China.
A key feature of ionic liquids is that their properties can be tailored by judicious selection of cation, anion and substituents so they can be designed to perform selective liquid–liquid separations.
But the use of these PF6− and BF4− ionic liquids as large scale extracting agents is not optimal because of the relative high price of starting material and has strict temperature limitation in presence of water.
Online since: December 2013
Authors: Jun Liu
Research and Apply the Technique of Dip Rock Cross-cut Uncovering Serious Outburst Coal Seam Group Jun Liu 1,2,a 1State Key Laboratory of Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037, China 2Chongqing Research Institute Co., Ltd. of China Coal Technology and Engineering Group, Chongqing 400037, China a liujuncaikuang@163.com Keywords: dip rock cross-cut uncovering coal; drilling and reaming integrated technique; serious outburst coal seam group; improving craft Abstract.
Table 2 Outburst prevention area measure test rating of uncovering coal Coal ηdrainage [%] PCY [MPa] WCY [m3/t] Δh2 [Pa] 13 47.2 0.30 3.67 117.6 14-1 85.6 0.42 4.38 78.4 Uncover coal safely After taking local comprehensive outburst prevention measures, use remotely initiated blasting to uncover coal, then drive one row once, gummite concrete, grout Ma li san that is a polyethylene imine colloid material, cross through in-seam cross-cut successfully, uncover the coal seam safely.
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