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A linear ridgelet network approach for fault diagnosis of analog circuit

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Science China(Information Sciences) 2010年第11期53卷 2251-2264页

作者： XIAO YingQun& HE YiGang College of Electrical and Information Engineering, hunan university, changsha {2. China College of Electrical and Information Engineering Hunan University

A linear ridgelet network combining ridgelet, linear term and the standard feed-forward neural network used for diagnosing the faults of analog circuit is constructed, and a training algorithm based on the steepest gradient descent method and momentum method for this network and the procedure for diagnosing these faults are proposed. The resulting linear ridgelet network can learn more rapidly from training samples and handle more effectively the complicated fault information of circuit under test than wavelet network and ridgelet network, classifying these faults effeciently and correctly and achieving a high classification accuracy. The simulation results demonstrate the effectiveness of this approach.

关键词： fault diagnosis of analog circuit ridgelet linear ridgelet network wavelet packet decomposition

Nonlinear elastic waves in a monatomic chain with nonlinear interaction

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原子与分子物理学报 2002年第1期19卷 79-82页

作者： PAN Liu-xian 1, ZHOU Guang-hui 2. LI Shu-shen 3.1.department of Physics, Yiyang Teacher's College, Yiyang 413.49 2. department of Physics, hunan Normal {3., changsha 410081 3. National Laboratory for Supperlattice and Microstructure, Chinese department of Physics Yiyang Teacher's College Yiyang 413049 department of Physics Hunan Normal University Changsha 410081 中科院半导体所 National Laboratory for Supperlattice and Microstructure 北京 100083

Nonlinear wave equation for a one-dimensional anharmonic crystal lattice in terms of its microscopic parameters is obtained by means of a continuum approximation. Using a small time scale transformation, the nonlinear wave equation is reduced to a combined KdV equation and its single soliton solution yields the supersonic kink form of nonlinear elastic waves for the system.

关键词： Monatomic chain Continuum approximation Nonlinear elastic wave

Carbon Paste Electrode Modified by Surfactant for Anodic Stripping Voltammetric Determination of Sulphadiazine

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Chemical Research in Chinese Universities 1994年第2期10卷 85-92页

作者： Zhang Zheng-qi Chen Zhan-guang Chen Sheng-zong TAO Mei-juan and ZHANG Hong(Departnient of chemistry and Chemical Engineering, hunan university, {2., {3.)

he present paper covers the construction and behaviour of a mixed binder car-bon paste electrode modified by surfactant system appropriate for the anodic strip-ping voltammetric quantitation of sulphadiazine. The mixed binder consisted ofglycerol and liquid paraffin. On this electrode in a PH 8. 2. buffer solution sulpha-diazine yields a sensitive anodic stripping voltammetric wave at 0. 82.V. It can beused for the determination of trace amounts of drug, the linear range of the peakcurrent to the sulphadiazine concentration being from 1. 0 x 10-7 to 5. 0 x 10-5mol/L, and the detection limit being 6. 6 x 10-9 mol/L with a relative standard de-viation of 2. 6% (n= 15).The proposed method was used to determine the drug inurine samples.

关键词： Carbon paste electrode(CPE) Sulphadiazine Stripping voltammetry

Analysis on cohesive crack opening displacement considering the strain softening effect

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Science China(Physics,Mechanics & Astronomy) 2006年第1期49卷 88-101页

作者： WANG Limin1, XU Shilang2.& ZHAO Xiqiang3.1. Mechanics department, Shandong {2. of Technology, Zibo 2.5049, China 2. Civil Engineering department, Dalian {2. of Technology, Dalian 11602., China 3. Mathematics department, Ocean {2. of China, Qingdao 2.6071, China Mechanics department Shandong University of Technology Zibo China Civil Engineering department Dalian University of Technology Dalian China Mathematics department Ocean University of China Qingdao China

In order to investigate the crack propagation in quasi-brittle materials like rock, ceramic and concrete, Hillerborg and his co-researchers abstracted the fracture process zone in front of a stress free crack in terms of a “fictitious crack zone”. On the fictitious crack zone, cohesive stresses distribute following a given softening relationship of stress vs. crack opening. Based on the polynomial or power series expression of cohesive crack opening displacement, the relationship of the cohesive stress vs. the crack opening displacement is established using elastic theory and integral equation, and some unknown physics variables are obtained using variation approach. The calculation results gained in this paper are close to the experimentally test ones.

关键词： cohesive crack, softening, dissipation work, variation approach.

Application of numerical simulation on optimum design of two-dimensional sedimentation tanks in the wastewater treatment plant

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Journal of Environmental Sciences 2003年第3期15卷 346-350页

作者： ZENG Guang-ming,ZHANG Shuo-fu, QIN Xiao-sheng, HUANG Guo-he, LI Jian-bing (department of Environmental Science and Engineering of hunan university, {2. {3. China.) department of Environmental Science and Engineering of hunan university Changsha 410082 Chin

The paper establishes the relationship between the settling efficiency and the sizes of the sedimentation tank through the process of numerical simulation, which is taken as one of the constraints to set up a simple optimum designing model of sedimentation tank. The feasibility and advantages of this model based on numerical calculation are verified through the application of practical case.

关键词： numerical simulation sedimentation tank optimum design

APPLICATION OF SIMPLEX-DEVIATION-PATTERN RECOGNITION TO THE CONFIRMATION OF THE ELECTRODE REACTION MECHANISM

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Chinese Chemical Letters 1991年第3期2卷 237-238页

作者： Zheng Qi ZHANG Zhao Peng CHENG and Yu Cong ZHANG department of chemistry and chemical Engineering,{2. {3.,changsha,410082

Three hypotheses of the electrochemical reaction mechanism of the Dy(III)-ALC complex were put forward,based on the experimental *** it has been confirmed by simplex-deviation-pattern reoognition that the pola- rograp... 详细信息

关键词：工工 ALC exp APPLICATION OF SIMPLEX-DEVIATION-PATTERN RECOGNITION TO THE CONFIRMATION OF THE ELECTRODE REACTION MECHANISM Dy

Influence of Horizontal Flow on Atrium in High-Rise Residential Building

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湖南大学学报（自然科学版） 2009年第S1期36卷 15-18页

作者： LI Nian-ping,LI Jing,HE Dong-yue,ZHANG Min-hui,HOU Su-juan(College of Civil Engineering,hunan university,{2.,hunan 410082.China) College of Civil Engineering Hunan University Changsha 410082 China

In this study a 10-storied residential building model was employed to clarify the ventilation characteristics of the atrium and the rooms,which were effected by the different forms of lateral *** experiment was conducted under the combined effect of wind force and thermal buoyancy,and the similarity requirements were *** results have shown that the different forms of lateral openings cause the different ventilation effect of the building,and also have some certain *** conclusions provide a theoretical foundation for how to use the ventilation of atrium better in high-rise residential building.

关键词： high-rise residential building atrium model experiment horizontal flow natural ventilation

Cell-SELEX-based aptamer-conjugated nanomaterials for enhanced targeting of cancer cells

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Science China chemistry 2011年第8期54卷 1218-1226页

作者： KONG RongMei, CHEN Zhuo, YE Mao, ZHANG XiaoBing & TAN WeiHong State Key Laboratory for Chemo/Biosensing and Chemometrics College of chemistry and Chemical Engineering, hunan university, {2. {3. China State Key Laboratory for Chemo/Biosensing and Chemometrics College of chemistry and Chemical Engineering Hunan University Changsha China

Early detection and treatment of cancer depends on developing highly sensitive and specific methods for targeting cancer cells. To do this, aptamers, which are generated by a novel technique caUed ceU-SELEX （systematic evolution of ligands by exponential enrichment）, have been widely applied in cancer cell targeting based on such merits as high target affinity and specificity, small size, minimal immunogenicity, and ease of chemical modification. Furthermore, aptamers can gain more flexibility as cancer cell targeting tools when conjugated to nanomaterials, including metallic nanoparticles, quantum dots, silica nanoparticles, and carbon nanomaterials, among others. In this review, we discuss the use of cell-SELEX-based aptamer-nanomaterials conjugates as novel molecular tools for enhanced targeting of cancer cells.

关键词： celI-SELEX aptamer nanomaterial cancer cells targeting

Long-chain tetraalkyltin compounds as neutral carriers for nitrite-selective PVC membrane electrodes

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Chinese Journal of chemistry 1988年第3期6卷 215-222页

作者： WANG Ke-Min YU Ru-Qin*, department of chemistry and Chemical Engineering,{2., {3. department of chemistry and Chemical Engineering Hunan University Changsha

The nitrite-selective PVC membrane electrodes prepared with lipophilic long-chain tetraal-kyltin compounds as neutral carrier show selectivity patterns significantly different from those obtainedwith classical anion-exchangers. The potentiometric selectivity coefficient for nitrite ion with respectto nitrate ion has been improved by about four orders of magnitude. The linear response range ofthe electrode based on tetralauryltin （TLT） is from 1×10-1M down to 2.10-5M with a detectionlimit of 5×10-6M. The Nernstian response of the electrode in the medium of pH≥7 graduallychanges to a doubled super-Nernstian response when the solution turns slightly acidic. The changeof the response slope has a closely relation with the stepwise complex-formation equilibrium of thecarrier with the anion involved, which was experimentally studied by using ultraviolet *** explanation of the anomalous response behavior as well as the curve form of the potential-pHplot is given.

关键词： TLT PVC