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2012 8th International Conference on Natural Computation, ICNC 2012

作者： Ren, Jun Liu, Mingzhe Tuo, Xianguo Li, Zhe Shi, Rui State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu 610059 China

ISBN: (纸本)9781457721311

This paper presents a hybrid optimization model for predicting the elemental contents such as Ti, V and Fe in energy dispersive X-ray fluorescence (EDXRF) based on least square support vector machine (LS-SVM) and particle swarm optimization (PSO) methods. The model used PSO to optimize LS-SVM parameters. In order to assess the capability and effectiveness of the proposed model, several measurement methods such as SVM model and BP neural network model were compared. The results indicate that the proposed model is feasible for quantitative analysis of elemental contents in nondestructive nuclear measurement applications. © 2012 IEEE.

关键词： Support vector machines

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Kinematics simulation and control design of the agile wrist in a dual-arm robotic mechanical systems

Kinematics simulation and control design of the agile wrist ...

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2012 IEEE International Conference on Computer Science and automation engineering, CSAE 2012

作者： Jian, Yang Angeles, Jorge College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China Department of Mechanical Engineering Centre for Intelligent Machines McGill University Montreal QC Canada

ISBN: (纸本)9781467300865

In order to improve space positioning accuracy of the Agile Wrist consisting of a modified spherical parallel manipulator, which will influence the result of the Collisions experiment in a robotic mechanical testbed directly, this paper explores the motion control of Agile Wrist. Based on analysis an input - output (I/O) equation of spherical four-bar linkages for forward-displacement of spherical parallel robots, the inverse kinematics derivation is reported here to find the active-joint variables for each possible position and orientation (pose) of the mobile plate, as well as the singularity exist and defines what may be generalized as the workspace boundary. Meanwhile the kinematics simulation by using simulink S-Function combined with Q8 controller was carried out. The results showed that the Kinematics analysis and Control Design of Agile Wrist were correct. The modified spherical parallel manipulator can meet with the demands of Collisions experiment in the robotic mechanical testbed. © 2012 IEEE.

关键词： Robotics

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Single-phase Computational Fluid Dynamics Applicability for the Study of Three-dimensional Flow in 5×5 Rod Bundles with Spacer Grids

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Chinese Journal of Mechanical engineering 2012年第4期25卷 738-744页

作者： TIAN Ruifeng MAO Xiaohui GAO Puzhen HUANG Yanping College of Nuclear Science and Technology Harbin Engineering University Harbin 150001 China National Defense Key Discipline Laboratory of Nuclear Safety and Simulation Technology Harbin Engineering University Harbin 150001 China National Key Laboratory of Bubble Physics and Nature Circulation Nuclear Power Institute of China Chengdu 610041 China

Spacer grids play an important role in pressurized water reactor（PWR） fuel assembly in that they have significant influence on the thermal-hydraulic characteristics of the reactor *** so far,the numerical studies are performed without regarding dimple and spring of spacer grids,just considering mixing ***,these studies use k-ε turbulence model without considering the suitability of the other turbulence models upon the different spacer grids flow.A study is carried out to understand the 3-D single-phase flow in AFA-2G 5×5 rod bundles with spacer grids based on numerical *** order to investigate the suitability of different turbulence models,k-ε model and k-ω model,the influence of different parts of spacer grid on the fluid flow is also *** using second-order upwind scheme,hybrid grids technique,and improved SIMPLEC algorithm,the Reynolds averaged mass conservation and momentum conservation equations are solved,and the pressure and velocity field of flow are *** numerical simulation results are compared with experiment results and the agreement is *** simulation results show the influences of the spring,dimple and mixing vane,and the different characteristics of the k-ε model and k-ω *** with the experiment results,the simulation results suggest that the k-ω model is suitable for the simulation of the rod bundle flow with spacer grids;the spring and dimple are the main causes of the pressure loss in the spacer grid *** friction coefficient of the channel with spring and dimple is 1.5 times the coefficient of the channel with the *** results are beneficial to enhance the simulation ability of spacer grids flow and optimization design ability of spaces grid.

关键词： rod bundles spacer grids turbulence model SIMPLEC algorithm

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Description of α-decay chains for 293,294117 within covariant density functional theory

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Physical Review C 2013年第5期88卷 054324-054324页

作者： W. Zhang (张炜) Z. P. Li (李志攀) S. Q. Zhang (张双全) College of Physical Science and Engineering Zhengzhou University Zhengzhou 450001 People's Republic of China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454003 People's Republic of China School of Physical Science and Technology Southwest University Chongqing 400715 People's Republic of China State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing 100871 People's Republic of China

The covariant density functional theory with the point-coupling density functional PC-PK1 and the meson-exchange density functional PK1 has been applied to study the intrinsic triaxial and octupole deformation for 293,294117 isotopes, and the Qα values of their α-decay chains. The shape coexistence of normal deformation and prolate superdeformation is found in 293,294117 and some of their successive decay products. The Qα data of the α-decay chains are well reproduced. In particular, the influences of shape coexistence and rotational correction are examined.

关键词： DENSITY functionals ISOTOPES PARTICLES (nuclear physics) FUNCTIONAL analysis NUCLIDES

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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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A NOVEL IMMOBILIZATION METHOD FOR PIEZOELECTRIC IMMUNOSENSOR WITH HIGH SENSITIVITY AND GOOD STABILITY

A NOVEL IMMOBILIZATION METHOD FOR PIEZOELECTRIC IMMUNOSENSOR...

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The 2013 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2013全国压电和声波理论及器件技术研讨会)

作者： Xian-he HUANG Yan CHEN Hong CHEN Hua-shan SHI School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu61 Guangan Vocational and Technical College Guangan638000China State Key Laboratory of Biotherapy and Cancer Center West China HospitalWest China Clinical Medicin

The immobilization of cancer antigens onto the surface of piezoelectric immunosensor by a novel method was presented and evaluated for its potential use in early cancer detection. A 3rd overtone 10MHz AT-cut quartz crystal resonator was applied to detect the antibody of NuTu-19 ovarian cancer cell in serum samples using this novel immobilization method. The NuTu-19 ovarian cancer cells were planted on the electrode surface, the resulting very small mass change is then transformed into the change in frequency of crystal resonator. A self-made frequency counter was employed to display the frequency change. The change in resonance frequency was from 108 to 282Hz. The antibody content of NuTu-19 detected in immunized serum samples was 341ng/ul, and only 8% deviation compare to the data obtained from the protein quantification method. This immobilization method gave good results in terms of sensitivity, reproducibility and stability.

关键词： Piezoelectric immunosensor Quartz crystal Immobilization Stability Ovarian cancer cell

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Study of time-domain digital pulse shaping algorithms for nuclear signals

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nuclear Science and Techniques 2012年第3期23卷 150-155页

作者： ZHOU Jianbin ZHOU Wei LEI Jiarong TUO Xianguo ZHU Xing LIU Yi College of Nuclear Chengdu University of Technology Chengdu 610059 China State Key Laboratory of Coal Resources & Mine Safety College of Mining Engineering China University of Mining & Technology Xuzhou 221116 China Institute of Physics and Chemical China Academy of Engineering Physics Mianyang 621900 China

With the development on high-speed integrated circuit,fast high resolution sampling ADC and digital signal processors are replacing analog shaping amplifier *** paper firstly presents the numerical analysis and simulation on R-C shaping circuit model and C-R shaping circuit *** models are established based on 1st order digital differential method and Kirchhoff Current Law in time domain,and a simulation and error evaluation experiment on an ideal digital signal are carried out with Excel VBA.A digital shaping test for a semiconductor X-ray detector in real time is also *** a numerical analysis for Sallen-Key(S-K) low-pass filter circuit model is implemented based on the analysis of digital R-C and digital C-R shaping *** applying the 2nd order non-homogeneous differential equation,the authors implement a digital Gaussian filter model for a standard exponential-decaying signal and a nuclear pulse ***,computer simulations and experimental tests are carried out and the results show the possibility of the digital pulse processing algorithms.

关键词：数字信号处理器脉冲整形算法时域基尔霍夫电流定律计算机模拟非齐次微分方程电路模型

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Determination of trace mercury in geological samples by photo induced chemical vapor generation with isotope dilution inductively coupled plasma mass spectrometry

Determination of trace mercury in geological samples by phot...

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2012年全国同位素地质新技术新方法与应用学术讨论会

作者： Ying Gao Zeming Shi Yin Guan Xiafeng Xia College of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan College of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan

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An algorithm of reduction salt-pepper noise in TGS images

An algorithm of reduction salt-pepper noise in TGS images

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2012 International Conference on Computer Science and Electronics engineering, ICCSEE 2012

作者： Peng, Kexin Tuo, Xianguo Cai, Biao Wang, Yuling College of Nuclear Technology and Automation Emerging Chengdu University of Technology Sichuan Chengdu China School of Information Science and Technology Chengdu University of Technology Sichuan Chengdu China Xindu District Electric Power Supply Bureau Chengdu Electric Power Bureau Xindu China

ISBN: (纸本)9780769546476

Noise is an important factor in image quality of TGS In according to the Neighborhood Homogeneous Measurement (NHM) was proposed to process the salt-pepper noise of TGS image system which avoided the shortcomings of traditional median filtering algorithm and improved median filtering algorithm. A cross noise measurement window was designed in adaptive median filtering algorithm to adjust the domain of image pixel, which divided image pixel into noise and signal point through the calculation results of NHM. The iteration method was introduced to inhibit noise signal. The results showed that adaptive median filtering algorithm could effectively reduce the salt-pepper noise of TGS image system. © 2012 IEEE.

关键词： Iterative methods

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Eddy Current Pulsed Thermography for Gear Fatigue Evaluation:An open access database and its applications

Eddy Current Pulsed Thermography for Gear Fatigue Evaluation...

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第十届全国无损检测学术年会

作者： Ai Jun Yin Gui Yun Tian Liang Chen Jishan Zhang Brian Shaw State Key Laboratory of Mechanical Transmission College of Mechanical Engineering Chongqing Universi School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu61 School of Electrical and Electronic Engineering Newcastle UniversityNewcastle upon TyneNE1 7RUUni Design unit School of Mechanical Engineering and SystemNewcastle UniversityNewcastle upon TyneNE1

Pulsed eddy current (PEC) technique generates responses over a wide range of frequencies, containing more spectral coverage than traditional eddy current *** 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 *** paper investigates ECPT for the evaluation of gear fatigue *** paper proposes a statistical method based on single channet blind source separation to extract details ot gear *** discussion of transient thermal distribution and patterns of fatigue contact surfaces as well as the non-contact surfaces have been *** 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 *** comparison shows the competitive capability of ECPT in fatigue *** open access database of ECPT for gear fatigue evaluation is provided, and freely obtained to further analysis for gear fatigue evaluation.

关键词： Eddy current pulsed thermography Gear fatigue Evaluation Non-destructive testing

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