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Construction and cross-correlation analysis of the affective physiological response database

science china(Information sciences) 2010年第9期53卷 1774-1784页

作者： WEN WanHui1,QIU YuHui2,LIU GuangYuan1*,CHENG NanPu3 & HUANG XiTing4 1school of Electronic and Information engineering,southwest university,chongqing 400715,china 2College of Computer and Information science,southwest university,chongqing 400715,china 3school of materials science and engineering,southwest university,chongqing 400715,china 4school of Psychology,southwest university,chongqing 400715,china 1. school of Electronic and Information engineering Southwest University Chongqing 400715 China2. College of Computer and Information Science Southwest University Chongqing 400715 China3. School of Materials Science and Engineering Southwest University Chongqing 400715 China4. School of Psychology Southwest University Chongqing 400715 China

Six kinds of emotions,namely joy,surprise,disgust,grief,anger and fear,are elicited from 300 ordinary college students by means of high-rated movie *** signals of galvanic skin response(GSR),heart rate(HR),blood volume pulse(BVP),electrocardiogram(ECG),respiration(Rsp.),facial electromyography(EMG) and two channels of electroencephalography(EEG) from the frontal lobe were recorded while the subjects were watching the affective eliciting *** samples of each kind of signals are analyzed by using random matrix theory(RMT).From the distribution of the eigenvalues and eigenvectors of the correlation matrices of BVP,facial EMG and two EEGs,we find that the statistical properties of these four kinds of signals coincide with the RMT ***,the largest eigenvalue and the corresponding eigenvector component distribution of the correlation matrices of GSR,HR,ECG and *** deviated significantly from the RMT *** experiments also reveal that the correlations between two arbitrary samples of BVP,facial EMG or EEGs does not result from affective response but from random noises,whereas the amplitude variations of GSR,HR,ECG and *** the correlated affective physiological response *** to the data analysis results of RMT,110 features are firstly extracted from the GSR and HR signals,and then a subset of the initial features is selected by using the Backward Selection *** affective data samples each of which is a vector of the features are classified by using a Fisher classifier,and furthermore,the user-independent emotion recognition systems with good prediction performance are constructed during the model selection process.

关键词： affective computing emotion recognition affective physiological response database correlation analysis random matrix theory

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Effect of surface nanocrystallization on the corrosion behavior of Zircaloy-4

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science china(Technological sciences) 2009年第8期52卷 2227-2231页

作者： ZHU YuTao1,2 & ZHANG XiYan1,2,3 1 College of materials science and engineering, chongqing university, chongqing 400045, china 2 National engineering Research Center for Magnesium Alloys, chongqing university, chongqing 400044, china 3 school of Physical science and engineering Technology, Guangxi university, Nanning 530004, china 1. College of materials science and engineering Chongqing University Chongqing 400045 China 2. National engineering Research Center for Magnesium Alloys Chongqing University Chongqing 400044 China 3. school of Physical science and engineering Technology Guangxi University Nanning 530004 China

The contrastive corrosion experiments between surface nanocrystallined Zircaloy-4 and coarse-grained Zircaloy-4 under the condition of 673 K/10.3 MPa in pure water are carried out, and the microstructure of oxide films has been studied. The results indicate that the growth rate of oxide films formed on the nanocrystalline Zircaloy-4 is lower than that of oxide films formed on the coarse-grained Zircaloy-4. Simultaneously, the oxide/metal interface of the former is more regular and glossy than that of the latter. For nanocrystalline Zircaloy-4, the low oxygen diffusion rate through the oxide/metal interface can hinder the reaction of oxygen ion with metal ion. Furthermore, more tetragonal ZrO2 are observed in the oxide films, which can delay the martensite phase transition from tetragonal to monoclinic phase in oxide films.

关键词： nanocrystalline Zircaloy oxide film microstructure

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Surface Nanocrystallization of Magnesium Alloy AZ91D by High-Energy Shot Peening

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Journal of Wuhan university of Technology(materials science) 2009年第4期24卷 515-519页

作者：张津 school of materials science & engineering University of Science and Technology Beijing College of materials science & engineering Chongqing University of Technology

High-energy shot peening （HESP）, a method to produce severe plastic deformation by high velocity flying balls, was applied on die cast magnesium alloy AZ91D. Effects of surface nanocrystallization by HESP and heat treatment at different temperatures were investigated. The mi- crostructure evolution was conducted using X-ray diffraction （XRD） and field emission scanning electronic microscopy （FESEM）. The hardness was measured by microhardness tester. The experimental results show that surface nanocrystrallization of AZ91D obtained by HESP would lead to the increase of microhardness. Low temperature heated at 100℃ for 1 h do not change the property obviously. However, both the microstructure and microhardness vary greatly after heat treatment at 400℃ for 1 h.

关键词： AZ91 D surface nanocrystallization HESP microhardnss corrosion resistance

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Corrosion science general-purpose data model and interface (Ⅱ): OOD design and corrosion data markup language (CDML)

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science china(Technological sciences) 2008年第11期51卷 1850-1857页

作者： TANG ZiLong school of materials science and engineering, Tianjin university, Tianjin 300072, china school of materials science and engineering Tianjin University Tianjin China

With object oriented design/analysis, a general purpose corrosion data model (GPCDM) and a corrosion data markup language (CDML) are created to meet the increasing demand of multi-source corrosion data integration and sharing. "Cor- rosion data island" is proposed to model the corrosion data of comprehensiveness and self-contained. The island of tree-liked structure contains six first-level child nodes to characterize every important aspect of the corrosion data. Each first-level node holds more child nodes recursively as data containers. The design of data structure inside the island is intended to decrease the learning curve and break the acceptance barrier of GPCDM and CDML. A detailed explanation about the role and meaning of the first-level nodes are presented with examples chosen carefully in order to review the design goals and requirements proposed in the previous paper. Then, CDML tag structure and CDML application programming interface (API) are introduced in logic order. At the end, the roles of GPCDM, CDML and its API in the multi-source corrosion data integration and information sharing are highlighted and projected.

关键词： corrosion data model corrosion data markup language (CDML) application programming interface (API) information sharing

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Corrosion science general-purpose data model and interface (I): Meanings and issues of design and implementation

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science china(Technological sciences) 2008年第9期51卷 1394-1401页

作者： TANG ZiLong school of materials science and engineering, Tianjin university, Tianjin 300072, china 1. school of materials science and engineering Tianjin University Tianjin 300072 China

A brand new design of integrated corrosion information system is introduced to meet the constantly increasing demands of material corrosion information. Two concepts, "general-purpose corrosion data model" and "public corrosion data ex-changing interface", are suggested to integrate a wide variety of corrosion data sources based on detailed analysis on characteristics of each source in order to promote the information sharing and data mining. The architecture of integrated corrosion information environment is blueprinted. The insight analysis is focused on 1) architecture of the system; 2) data flow and information sharing; 3) roles of system players and their interactions; 4) approaches to data integration. Several key issues are addressed in detail including coverage of data model, data source integration and mitigation, and data granularity from system performance and model acceptance points of view. At the end, the design and implementation ap-proach of general corrosion data model is presented based on cutting edge IT techniques.

关键词： corrosion multi-source data modeling integrated information system

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Preparation of semi-solid AlSi7Mg alloy slurry with big capability

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Rare Metals 2010年第6期29卷 642-645页

作者： LI Sha and MAO Weimin school of materials science and engineering,university of science and Technology Beijing,Beijing 100083,china school of materials science and engineering University of Science and Technology Beijing Beijing China

Semi-solid AlSi7Mg alloy slurry was prepared by low superheat pouring and weak traveling-wave electromagnetic *** effects of pouring temperature and stirring power on the microstructure of AlSi7Mg alloy slurry were *** results show that the semi-solid AlSi7Mg alloy slurry of 5 kg can be *** new technology can save energy and make the pouring process *** the pouring temperature is decreased at a stirring power of 0.41 kW,the shape of primary α-Al grains gradually changes from dendritic-like to *** the alloy melt is poured at the temperature（630°C） with a certain superheat,the pouring process becomes easier,and the spherical microstructure of AlSi7Mg alloy slurry can be prepared by the weak traveling-wave electromagnetic *** the pouring temperature is 630°C,increasing the stirring power appropriately can result in better spherical primary α-Al grains,but if the stirring power is increased to a certain value（1.72 kW）,the shape of primary α-Al grains does not obviously improve when the stirring power is continually increased.

关键词： aluminum alloys metal forming semisolid slurry electromagnetic stirring microstructure

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Corrosion science general-purpose data model and interface (Ⅲ):Data integration and management environment

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science china(Technological sciences) 2008年第12期51卷 2089-2094页

作者： TANG ZiLong school of materials science and engineering,Tianjin university,Tianjin 300072,china school of materials science and engineering Tianjin University Tianjin China

A brand new Corrosion Data Integration and Management Environment(CDIME) is developed in Java programming language based on general-purpose corrosion data model(GPCDM) and corrosion data markup language(CDML) proposed in the previous *** general,the functionalities and features of CDIME meet most of design requirements including composition,inheritance,self-contained,relatively independence and so *** insight tutorial is introduced on the life circle of corrosion data islands from its creation,maintenance,and application like *** template feature makes the building of comprehensive data island as simple as a few mouse ***-only publishing of data as e-Book and PDF hold their own *** document can be imported and exported freely on any running *** achieving feature is addressed in detail because it is critical to data sharing and integration in *** the end,a real example is presented to help the understanding of data islands assembling and the advanced features offered by CDIME.

关键词： corrosion software data model information integration

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Ferroelectric properties of Bi_(3.4)Ho_(0.6)Ti_3O_(12) thin films prepared by sol-gel method

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science china(Technological sciences) 2008年第9期51卷 1439-1444页

作者： FU ChengJu1, HUANG ZhiXiong1, LI Jie2 & GUO DongYun3 1 school of materials science and Technology, Wuhan university of Technology, Wuhan 430070, china 2 school of Mechanical engineering, chongqing university of science and Technology, chongqing 400050, china 3 Department of Physics, Wuhan university, Wuhan 430072, china school of materials science and Technology Wuhan University of Technology Wuhan 430070 China school of Mechanical engineering Chongqing University of Science and Technology Chongqing 400050 China Department of Physics Wuhan University Wuhan 430072 China

We have prepared the Ho-substituted bismuth titanate (Bi3.4Ho0.6Ti3O12, BHT) thin films on Pt/Ti/SiO2/Si substrates using sol-gel method. The crystal structure and morphology of the films were characterized using X-ray diffraction and atomic force microscopy. The BHT film shows a single phase of Bi-layered Aurivillius structure and dense microstructure. The 2Pr and 2Ec of the 600-nm-thick BHT film were 38.4 μC/cm2 and 376.1 kV/cm, respectively at applied electric field 500 kV/cm. The dielectric constant and dielectric loss are about 310 and 0.015 at a frequency of 1 MHz, respectively. The Pr value decreased to 93% of its pre-fatigue values after 4.46×109 switching cycles at 1 MHz frenquency, and the BHT film shows good in-sulating behavior according to the test of leakage current.

关键词： Bi3.4Ho0.6Ti3O12 thin film sol-gel method ferroelectric property fatigue dielectric constant

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Effect of SPM Scanning Range on the Micromorphology Parameters

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International Journal of Minerals,Metallurgy and materials 1998年第1期12卷 36-38页

作者： Libing Liao Suozai Li (school of materials science and engineering, china university of Geosciences, Beijing 100083, china) school of materials science and engineering China University of Geosciences Beijing 100083 China

The surface of a compact disk is analyzed by using SPM and the quantitative micromorphology analysissoftware SPMIAS developed by the author. Images at the same position but with different scanning ranges areobtained under the same experimental conditions. Micromorphology parameters are calculated and compared, andthe relationship between the changing of the scanning range and the changing of micromorphology parameters issummarized.

关键词： Scanning Probe Microscope(SPM) micromorphology micromorphology parameters

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Development of SPM Quantitative Micromorphology Analysis Software

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International Journal of Minerals,Metallurgy and materials 1999年第2期13卷 136-138页

作者： Suozai Li Libing Liao(school of materials science and engineering, china university of Geosciences, Beijing 100083, china) school of materials science and engineering China University of Geosciences Beijing 100083 China

Scanning Probe Microscope (SPM) has great advantages in quantitative micromorphology analysis because of its conveniencein obtaining micromorphology information of materials on nanometer or atomic scale under control of a computer. Based on an established SPM quantitative micromorphology analysis model, an SPM image analysis software Which can calculate both two- and three-dimensional micromorphology parameters is developed.

关键词： SPM quantitative micromorphology analysis software

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