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EDXRF based on-line analysis system and its applications in grade analysis of Ti and Fe ore concentrates

Yuanzineng Kexue Jishu/Atomic Energy Science and technology 2013年第3期47卷 508-512页

作者： Li, Zhe Tuo, Xian-Guo Cheng, Yi Yang, Jian-Bo College of Nuclear Technology and Automatic Engineering Chengdu University of Technology Chengdu 610059 China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China

The efficiency of titanium and iron contents analysis is the key to the productivity of titanium and iron ore concentrate. Since energy dispersive X-ray fluorescence technique has advantages of non-destructive, multi-elemental fast analysis etc., an on-line automatic Ti & Fe grade analysis system based on this technique was developed, which consists of a 238Pu source and a proportional counter. A working curve was established to determine the contents of Fe and Ti in given types of ore concentrates from electrical separation process. A total of 801 tests were carried. The results show that the work rate of this system is 95.38%, and the passing rate is 95.15% when absolute error for total-Ti is less than 0.5%. The system is able to complete an analytical process within 5 minutes, basically satisfying the requirement of real-time monitoring. It is a reliable method for on-line quality control in the production process of titanium and iron ore concentrates.

关键词： Quality control

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Determination of Total Mercury in Biological Tissue by Isotope Dilution ICPMS after UV Photochemical Vapor Generation

Determination of Total Mercury in Biological Tissue by Isoto...

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第十五届北京分析测试学术报告会暨展览会(BCEIA 2013)

作者： Jiayun ZHANG Zeming SHI Ying GAO Lu YANG College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chemical Metrology National Research Council Canada

Mercury is a global pollutant due to its potent neurotoxicity as well as its bioaccumulation in the food chain[1,2].The toxicity,bioavailability,and mobility of mercury depend not only on its total concentration but a... 详细信息

关键词： ICPMS PVG Determination of Total Mercury in Biological Tissue by Isotope Dilution ICPMS after UV Photochemical Vapor Generation

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Dynamical balance optimization and control of quadruped robots under perturbing external force

Dynamical balance optimization and control of quadruped robo...

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3rd IFAC Conference on Intelligent Control and automation Science, ICONS 2013

作者： Li, Zhijun Yu, Sijia Liu, Sibang Key Laboratory of Autonomous Systems and Networked Control College of Automation Science and Engineering South China University of Technology Guangzhou China Robotics Institute School of Mechanical Engineering University of Electronic Science and Technology of China Chengdu 610054 China Robotics Institute University of Electronic Science and Technology of China Chengdu 610054 China

ISBN: (纸本)9783902823458

This paper investigates the optimal feet forces distribution and control of quadruped robots under external disturbance forces. First, we formulate a constrained dynamic model of quadruped robots and derive a reduced order dynamical model of motion/force. Consider an external wrench on quadruped robots, the distribution of required forces and moments on the supporting legs of a quadruped robot is handled as a tip-point force distribution and used to equilibrate the external wrench. Then, a gradient neural network is adopted to minimize the optimized objective function with linear equality and inequality constraints, and hybrid motion/force control based on adaptive neural network is used to compensate for the external perturbation in the environment and approximate feedforward force and impedance of the leg joints on line. The verification of the proposed control is conducted using the extensive simulations. Copyright © 2013 IFAC.

关键词： Adaptive control systems

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Effect of pH to adsorption behavior of Pu on bentonite in aqueous environment

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Yuanzineng Kexue Jishu/Atomic Energy Science and technology 2013年第4期47卷 523-528页

作者： Wang, Xiao-Qiang Li, Ping-Chuan Leng, Yang-Chun Tuo, Xian-Guo Su, Ji-Long Yue, Ping College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu 610059 China Sichuan Environmental Protection Engineering Co. Ltd. China National Nuclear Corporation Guangyuan 610006 China Laboratory of National Defense for Radioactive Waste and Environmental Security Southwest University of Science and Technology Mianyang 621010 China State Key Laboratory of Geoharzard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China

The effects of pH to the adsorption behavior of Pu in GMZ-bentonite, Lingshou Ca-bentonite, Na-bentonite and bleaching earth were tested by static adsorption experiments in aqueous environment. The results show that the adsorption equilibrium time of Pu is four days in GMZ-bentonite and 5-6 days in bleaching earth, Ca-bentonite and Na-bentonite. In aqueous environment, the adsorption capacity of bentonite to Pu increases with pH in water phase, and it is weak in acidic aqueous environment and strong in alkaline aqueous environment extremely.

关键词： Bentonite

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Experimental study of infrasonic signal generation during rock fracture under uniaxial compression

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International Journal of Rock Mechanics and Mining Sciences 2013年 60卷 37-46页

作者： Xing Zhu Qiang Xu Jianbin Zhou Minggao Tang State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China College of Automation Engineering Chengdu University of Technology Chengdu 610059 China

The low frequency infrasonic signals generated during micro fracture process of six types of rocks (including granite , mudstone , sandstone , phyllite , limestone and red sandstone) under uniaxial compression were detected. A specialized data collection system was developed for infrasonic signals sensing and analog-to-digital conversion. The wavelet-based de-noising method, Short-Time Fourier Transform (STFT) time-frequency analysis and accumulative ring-down count (ARC) of events were used to process and analyze digital infrasonic signals in order to investigate the characteristics of infrasonic emission (IE) event during rock micro fracture process. The experimental results indicate obvious infrasonic emission events before rock failure. The characteristic frequency typically ranges from about 2.0 to 8.0 Hz for the six kinds of rocks and it has no necessary relationship with structure or lithology . According to the ARC estimate, hard rocks (such as granite, limestone) can generate much more infrasonic emission events than soft ones (mudstone, phyllite), in other words, the brittle fracture is more prone to generate infrasonic signals. In addition, infrasound is an inaudible and low-attenuate signal that cannot be absorbed easily by water or air, and can propagate avoiding huge obstacles due to its long wavelength. The research results and the advantages of the infrasound will provide a beneficial supplement for our further studies on rock instability or rocky landslide in field combined with other advanced methods.

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Eddy current pulsed thermography for fatigue evaluation of gear

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AIP Conference Proceedings 2014年第1期1581卷 1652-1662页

作者： Gui Yun Tian Aijun Yin Bin Gao Jishan Zhang Brian Shaw School of Automation Engineering University of Electronic Science and Technology of China Chengdu Sichuan 611731 P. R. China and School of Electrical and Electronic Engineering Newcastle University Newcastle upon Tyne NE1 7RU United Kingdom State Key Laboratory of Mechanical Transmission College of Mechanical Engineering Chongqing University P. R. China and School of Electrical and Electronic Engineering Newcastle University Newcastle upon Tyne NE1 7RU United Kingdom Design Unit School of Mechanical Engineering and System Newcastle University Newcastle upon Tyne NE1 7RU United Kingdom

The pulsed eddy current (PEC) technique generates responses over a wide range of frequencies, containing more spectral coverage than traditional eddy current inspection. Eddy current pulsed thermography (ECPT), a newly developed non-destructive testing (NDT) technique, has advantages such as rapid inspection of a large area within a short time, high spatial resolution, high sensitivity and stand-off measurement distance. This paper investigates ECPT for the evaluation of gear fatigue tests. The paper proposes a statistical method based on single channel blind source separation to extract details of gear fatigue. The discussion of transient thermal distribution and patterns of fatigue contact surfaces as well as the non-contact surfaces have been reported. In addition, the measurement for gears with different cycles of fatigue tests by ECPTand the comparison results between ECPT with magnetic Barkhausen noise (MBN) have been evaluated. The comparison shows the competitive capability of ECPT in fatigue evaluation.

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The Space Distributions of Platinum Group Elements of the No.2 Ore Body in the Jinchuan Ni-Cu Sulfide Deposit, SW China

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Acta Geologica Sinica - English Edition 2014年第S2期88卷

作者： Liang WANG Liemeng CHEN Xieyan SONG Jinjin JIANG Zhiqiang FU The college of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu 610059 China State Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Guizhou Land Survey and Plan Institute Guiyang 550004 China

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End-point regulation of a flexible robotic manipulator under the unknown spatiotemporally varying disturbance

End-point regulation of a flexible robotic manipulator under...

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3rd IFAC Conference on Intelligent Control and automation Science, ICONS 2013

作者： Zhang, Shuang He, Wei Liu, Chang Huang, Deqing Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore Robotics Institute School of Automation Engineering University of Electronic Science and Technology of China Chengdu 611731 China School of Automation Engineering University of Electronic Science and Technology of China Chengdu 611731 China Department of Aeronautics Imperial College London London SW7 2AZ United Kingdom

ISBN: (纸本)9783902823458

In this paper, the end-point regulation problem is investigated for a flexible robotic manipulator under the spatiotemporally varying disturbance. By using the Hamilton's principle, the dynamics of the flexible robotic manipulator are represented by one partial differential equation (PDE) and five ordinary differential equations (ODEs). Boundary control is developed to drive the manipulator to the desired set-point and simultaneously suppress the vibrations of the flexible link. Considering the unknown spatiotemporally varying disturbance, the developed boundary control schemes achieve uniform boundedness of the steady state error between the boundary payload and the desired position. Simulations are provided to illustrate the applicability and effectiveness of the proposed control. Copyright © 2013 IFAC.

关键词： Ordinary differential equations

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Spectral Measurement of Electron Antineutrino Oscillation Amplitude and Frequency at Daya Bay

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Physical Review Letters 2014年第6期112卷 061801-061801页

作者： F. P. An A. B. Balantekin H. R. Band W. Beriguete M. Bishai S. Blyth R. L. Brown I. Butorov G. F. Cao J. Cao R. Carr Y. L. Chan J. F. Chang Y. Chang C. Chasman H. S. Chen H. Y. Chen S. J. Chen S. M. Chen X. C. Chen X. H. Chen Y. Chen Y. X. Chen Y. P. Cheng J. J. Cherwinka M. C. Chu J. P. Cummings J. de Arcos Z. Y. Deng Y. Y. Ding M. V. Diwan E. Draeger X. F. Du D. A. Dwyer W. R. Edwards S. R. Ely J. Y. Fu L. Q. Ge R. Gill M. Gonchar G. H. Gong H. Gong Y. A. Gornushkin W. Q. Gu M. Y. Guan X. H. Guo R. W. Hackenburg R. L. Hahn G. H. Han S. Hans M. He K. M. Heeger Y. K. Heng P. Hinrichs yk. Hor Y. B. Hsiung B. Z. Hu L. J. Hu L. M. Hu T. Hu W. Hu E. C. Huang H. X. Huang H. Z. Huang X. T. Huang P. Huber G. Hussain Z. Isvan D. E. Jaffe P. Jaffke S. Jetter X. L. Ji X. P. Ji H. J. Jiang J. B. Jiao R. A. Johnson L. Kang S. H. Kettell M. Kramer K. K. Kwan M. W. Kwok T. Kwok W. C. Lai W. H. Lai K. Lau L. Lebanowski J. Lee R. T. Lei R. Leitner A. Leung J. K. C. Leung C. A. Lewis D. J. Li F. Li G. S. Li Q. J. Li W. D. Li X. N. Li X. Q. Li Y. F. Li Z. B. Li H. Liang C. J. Lin G. L. Lin S. K. Lin Y. C. Lin J. J. Ling J. M. Link L. Littenberg B. R. Littlejohn D. W. Liu H. Liu J. C. Liu J. L. Liu S. S. Liu Y. B. Liu C. Lu H. Q. Lu K. B. Luk Q. M. Ma X. B. Ma X. Y. Ma Y. Q. Ma K. T. McDonald M. C. McFarlane R. D. McKeown Y. Meng I. Mitchell Y. Nakajima J. Napolitano D. Naumov E. Naumova I. Nemchenok H. Y. Ngai W. K. Ngai Z. Ning J. P. Ochoa-Ricoux A. Olshevski S. Patton V. Pec J. C. Peng L. E. Piilonen L. Pinsky C. S. J. Pun F. Z. Qi M. Qi X. Qian N. Raper B. Ren J. Ren R. Rosero B. Roskovec X. C. Ruan B. B. Shao H. Steiner G. X. Sun J. L. Sun Y. H. Tam H. K. Tanaka X. Tang H. Themann S. Trentalange O. Tsai K. V. Tsang R. H. M. Tsang C. E. Tull Y. C. Tung B. Viren V. Vorobel C. H. Wang L. S. Wang L. Y. Wang L. Z. Wang M. Wang N. Y. Wang R. G. Wang W. Wang W. W. Wang X. Wang Y. F. Wang Z. Wang Z. M. Wang D. M. Webber H. Wei Y. D. Wei L. J. Wen K. Whisnant C. G. White L. Whitehead T. Wise H. L. H. Wong S. C. F. Wong E. Worcester Q. Institute of High Energy Physics Beijing East China University of Science and Technology Shanghai University of Wisconsin Madison Wisconsin Brookhaven National Laboratory Upton New York Department of Physics National Taiwan University Taipei Joint Institute for Nuclear Research Dubna Moscow Region California Institute of Technology Pasadena California Chinese University of Hong Kong Hong Kong National United University Miao-Li Institute of Physics National Chiao-Tung University Hsinchu Nanjing University Nanjing Department of Engineering Physics Tsinghua University Beijing Shenzhen Univeristy Shenzhen North China Electric Power University Beijing Siena College Loudonville New York Department of Physics Illinois Institute of Technology Chicago Illinois Lawrence Berkeley National Laboratory Berkeley California Department of Physics University of California Berkeley California Department of Physics University of Illinois at Urbana-Champaign Urbana Illinois Chengdu University of Technology Chengdu Shanghai Jiao Tong University Shanghai Beijing Normal University Beijing College of William and Mary Williamsburg Virginia Department of Physics Yale University New Haven Connecticut Center for Neutrino Physics Virginia Tech Blacksburg Virginia China Institute of Atomic Energy Beijing University of California Los Angeles California Shandong University Jinan School of Physics Nankai University Tianjin Department of Physics University of Cincinnati Cincinnati Ohio Dongguan University of Technology Dongguan Department of Physics The University of Hong Kong Pokfulam Hong Kong Department of Physics University of Houston Houston Texas Charles University Faculty of Mathematics and Physics Prague University of Science and Technology of China Hefei Sun Yat-Sen (Zhongshan) University Guangzhou Joseph Henry Laboratories Princeton University Princeton New Jersey Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute Troy New York Chin

A measurement of the energy dependence of antineutrino disappearance at the Daya Bay reactor neutrino experiment is reported. Electron antineutrinos (ν¯e) from six 2.9 GWth reactors were detected with six detectors deployed in two near (effective baselines 512 and 561 m) and one far (1579 m) underground experimental halls. Using 217 days of data, 41 589 (203 809 and 92 912) antineutrino candidates were detected in the far hall (near halls). An improved measurement of the oscillation amplitude sin22θ13=0.090−0.009+0.008 and the first direct measurement of the ν¯e mass-squared difference |Δmee2|=(2.59−0.20+0.19)×10−3 eV2 is obtained using the observed ν¯e rates and energy spectra in a three-neutrino framework. This value of |Δmee2| is consistent with |Δmμμ2| measured by muon neutrino disappearance, supporting the three-flavor oscillation model.

关键词： ELECTRONIC antineutrino ENERGY security LIQUID scintillators PHOTOELECTRONS NEUTRINO oscillation

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A nonparametric identification method for frequency response function estimation

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Zhendong yu Chongji/Journal of Vibration and Shock 2013年第14期32卷 174-179页

作者： Meng, Xin-Yu Ning, Hui Wang, Dao-Bo Tang, Xiao-Jun College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Northwest Institute of Nuclear Technology Wulumuqi 841700 China

Here, a nonparametric identification method for frequency response function estimation was proposed. It could be applied in vibration engineering field. In discrete Fourier transformation, the effect of the initial and end conditions and an observed noise spectrum on frequency response function estimation was studied. To obtain the more accurate frequency response function estimation values, the frequency response function, the initial and end conditions and impulse response coefficients were taken as a parameter vector to be identified. The problem of frequency response function estimation was converted into a linear least square optimal problem. Then, a new separable algorithm was proposed to solve this linear least square optimal problem. Finally, the simulation example results verified the effectiveness of the proposed method.

关键词： Impulse response

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