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Ghost Module Based Residual Mixture of Self-Attention and Convolution for Online Signature Verification

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Computers, Materials & Continua 2024年第4期79卷 695-712页

作者： Fangjun Luan Xuewen Mu shuai yuan Department of Computer Technology School of Computer Science and EngineeringShenyang Jianzhu UniversityShenyang110168China Liaoning Province Big Data Management and Analysis Laboratory of Urban Construction Shenyang Jianzhu UniversityShenyang110168China Shenyang Branch of National Special Computer Engineering Technology Research Center Shenyang Jianzhu UniversityShenyang110168China

Online Signature Verification (OSV), as a personal identification technology, is widely used in various ***, it faces challenges, such as incomplete feature extraction, low accuracy, and computational heaviness. Toaddress these issues, we propose a novel approach for online signature verification, using a one-dimensionalGhost-ACmix Residual Network (1D-ACGRNet), which is a Ghost-ACmix Residual Network that combines convolutionwith a self-attention mechanism and performs improvement by using Ghost method. The Ghost-ACmix Residualstructure is introduced to leverage both self-attention and convolution mechanisms for capturing global featureinformation and extracting local information, effectively complementing whole and local signature features andmitigating the problem of insufficient feature extraction. Then, the Ghost-based Convolution and Self-Attention(ACG) block is proposed to simplify the common parts between convolution and self-attention using the Ghostmodule and employ feature transformation to obtain intermediate features, thus reducing computational ***, feature selection is performed using the random forestmethod, and the data is dimensionally reducedusing Principal Component Analysis (PCA). Finally, tests are implemented on the MCYT-100 datasets and theSVC-2004 Task2 datasets, and the equal error rates (EERs) for small-sample training using five genuine andforged signatures are 3.07% and 4.17%, respectively. The EERs for training with ten genuine and forged signaturesare 0.91% and 2.12% on the respective datasets. The experimental results illustrate that the proposed approacheffectively enhances the accuracy of online signature verification.

关键词： Online signature verification feature selection ACG block ghost-ACmix residual structure

On the Chern-Simons-Schrodinger Equation with Critical Exponential Growth

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Acta Mathematica Sinica,English Series 2021年第12期37卷 1875-1895页

作者： Si Tong CHEN Xian Hua TANG shuai yuan School of Mathematics and Statistics Central South UniversityChangsha 410083P.R.China

This paper is concerned with the following Chern-Simons-Schrodinger equation -Δu+V(|x|)u+(∫_(|x|)^(∞)h(s)/su^(2)(s)ds+h^(2)(|x|)/|x|^(2))u=a(|x|)f(u)in R^(2),where h(s)=∫_(0)^(s)l/2u^(2)(l)dl,V,a:R^(+)→R are radially symmetric potentials and the nonlinearity f:R→R is of subcritical or critical exponential growth in the sense of *** give some new sufficient conditions on f to obtain the existence of nontrivial solutions or ground state *** particular,some new estimates and techniques are used to overcome the difficulty arising from the critical growth of Trudinger-Moser type.

关键词： Chern-Simons-Schrodinger equation critical exponential growth Trudinger-Moser

Effects of microstructure on uniaxial strength asymmetry of open-cell foams

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Applied Mathematics and Mechanics(English Edition) 2015年第1期36卷 37-46页

作者： Zi-xing LU Ji-xiang HUANG Ze-shuai yuan Institute of Solid Mechanics Beihang University

Based on the elongated Kelvin model, the effect of microstructure on the uniaxial strength asymmetry of open-cell foams is investigated. The results indicate that this asymmetry depends on the relative density, the solid material, the cell morphology, and the strut geometry of open-cell foams. Even though the solid material has the same tensile and compressive strength, the tensile and compressive strength of open-cell foams with asymmetrical sectional struts are still different. In addition, with the increasing degree of anisotropy, the uniaxial strength as well as the strength asymmetry increases in the rise direction but reduces in the transverse direction. Moreover, the plastic collapse ratio between two directions is verified to depend mainly on the cell morphology. The predicted results are compared with Gibson and Ashby＇s theoretical results as well as the experimental data reported in the literature, which validates that the elongated Kelvin model is accurate in explaining the strength asymmetry presented in realistic open-cell foams.

关键词： open-cell foam microstructure strength Kelvin model

Spatiotemporal variation of surface albedo and its influencing factors in northern Xinjiang, China

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Journal of Arid Land 2023年第11期15卷 1315-1339页

作者： yuan shuai LIU Yongqiang QIN Yan ZHANG Kun College of Geography and Remote Sensing Sciences Xinjiang UniversityUrumqi 830046China Xinjiang Key Laboratory of Oasis Ecology Xinjiang UniversityUrumqi 830046China

Surface albedo is a quantitative indicator for land surface processes and climate modeling,and plays an important role in surface radiation balance and climate *** this study,by means of the MCD43A3 surface albedo product developed on the basis of Moderate Resolution Imaging Spectroradiometer(MODIS),we analyzed the spatiotemporal variation,persistence status,land cover type differences,and annual and seasonal differences of surface albedo,as well as the relationship between surface albedo and various influencing factors(including Normalized Difference Snow Index(NDSI),precipitation,Normalized Difference Vegetation Index(NDVI),land surface temperature,soil moisture,air temperature,and digital elevation model(DEM))in the north of Xinjiang Uygur Autonomous Region(northern Xinjiang)of Northwest China from 2010 to 2020 based on the unary linear regression,Hurst index,and Pearson's correlation coefficient *** with the random forest(RF)model and geographical detector(Geodetector),the importance of the above-mentioned influencing factors as well as their interactions on surface albedo were quantitatively *** results showed that the seasonal average surface albedo in northern Xinjiang was the highest in winter and the lowest in *** annual average surface albedo from 2010 to 2020 was high in the west and north and low in the east and south,showing a weak decreasing trend and a small and stable overall *** cover types had a significant impact on the variation of surface *** annual average surface albedo in most regions of northern Xinjiang was positively correlated with NDSI and precipitation,and negatively correlated with NDVI,land surface temperature,soil moisture,and air *** addition,the correlations between surface albedo and various influencing factors showed significant differences for different land cover types and in different *** be specific,NDSI had the largest influence on surface albedo,follow

关键词： surface albedo MCD43A3 Hurst index random forest(RF)model geographical detector(Geodetector) Normalized Difference Snow Index(NDSI) northern Xinjiang

Effect of long-period ordered stacking on twinning behavior and mechanical properties of Mg-Al-Y alloy during uniaxial hot compression

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Journal of Materials Science & Technology 2023年第11期142卷 152-166页

作者： shuai yuan Jinhui Wang Lei Zhang Shiyu Luan Peipeng Jin Qinghai Provincial Key Laboratory of New Light Alloys Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and FormingQinghai UniversityXining 810016China School of Material Science and Engineering Shenyang University of TechnologyShenyang 110870China

Two alloys with(T4-4h)and without(T4-8h)long-period stacking ordered(LPSO)phase were obtained by solution treatment of as-cast Mg-1Al-12Y alloy at 540℃ for 4 h and 8 h,*** compressive tests(300-450℃,ε=0.01s^(-1))showed that the strengthening effect of LPSO in T4-4h alloy gradually disappeared with temperature *** addition,the corresponding compression deformation behavior of the two alloys was also investigated by electron backscatter diffraction(EBSD).It was found that the twinning of the two alloys was dominated by{1012}extension twins,and the large amount of lamellar LPSO in T4-4 h alloy inhibited the activation and growth of ***[0001]//compression direction(CD)texture formed after deformation is mostly attributed to the activation and growth of extension *** analyzing the activated twin variants,it was found that the activation of twin variants mainly depended on Schmid factor(SF).For twin variants with smaller SF,they may be activated due to local stress *** on the analysis results of in-grain misorientation axis(IGMA)and SF,the deformation mechanism of the alloys at elevated temperature is dominated by basal slip and non-basal *** stronger mechanical properties of T4-4h alloy than those of T4-8h are attributed to the obstruction of non-basal slip movement by LPSO.

关键词： LPSO strengthening Hot deformation Twinning behavior

Hydrogen-based mineral phase transformation mechanism investigation of pyrolusite ore

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International Journal of Minerals,Metallurgy and Materials 2024年第11期31卷 2445-2457页

作者： Ruofeng Wang shuai yuan Yanjun Li Peng Gao Ru Li School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China National-local Joint Engineering Research Center of High-efficient exploitation technology for Refractory Iron Ore Resources Shenyang 110819China

Pyrolusite comprises the foremost manganese oxides and is a major source of manganese *** innovative hydrogenbased mineral phase transformation technology to pyrolusite was proposed,where a 96.44%distribution rate of divalent manganese(Mn^(2+))was observed at an optimal roasting temperature of 650℃,a roasting time of 25 min,and an H2 concentration of 20vol%;under these *** manganese predominantly existed in the form of *** study investigated the generation mechanism of manganosite based on the reduction kinetics,phase transformation,and structural evolution of pyrolusite and revealed that high temperature improved the distribution rate,and the optimal kinetic model for the reaction was the random nucleation and growth model(reaction order,n=3/2)with an activation energy(E_(a))of 24.119 kJ·mol^(−1).Throughout the mineral phase transformation,manganese oxide from the outer layer of particles moves inward to the *** addition,pyrolusite follows the reduction sequence of MnO_(2)→Mn_(2)O_(3)→Mn_(3)O_(4)→MnO,and the reduction of manganese oxides in each valence state simultaneously *** findings provide significant insight into the efficient and clean utilization of pyrolusite.

关键词： reduction pyrolusite phase transformation microstructural evolution

Ionic liquids for high performance lithium metal batteries

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Journal of Energy Chemistry 2021年第8期30卷 320-333,I0007页

作者： Kexin Liu Zhuyi Wang Liyi Shi Siriporn Jungsuttiwong shuai yuan School of Materials Science and Engineering Shanghai University200444 ShanghaiChina Research Centre of Nanoscience and Nanotechnology Shanghai University200444 ShanghaiChina Center for Organic Electronic and Alternative Energy Department of Chemistry and Center of Excellence for Innovation in ChemistryFaculty of ScienceUbon Ratchathani University34190 Ubon RatchathaniThailand Emerging Industries Institute Shanghai UniversityJiaxing 314006China

The pursuit of high energy density has promoted the development of high-performance lithium metal ***,it faces a serious security *** liquids have attracted great attention due to their high ionic conductivity,non-flammability,and the properties of promoting the formation of stable SEI *** understanding the problems existing in lithium metal batteries and the role of ionic liquids in them is of great significance for improving the performance of lithium metal *** article reviews the effects of the molecular structure of ionic liquids on ionic conductivity,Li^(+)ion transference number,electrochemical stability window,and lithium metal anode/electrolyte interface,as well as the application of ionic liquids in Li-high voltage cathode batteries,Li-O_(2) batteries and Li-S *** molecular design,composition and polymerization will be the main strategies for the future development of ionic liquid-based electrolytes for high performance lithium metal battery.

关键词： Ionic liquids Li+ion conduction Interface issues Lithium metal battery

Removal efficacy and mechanism of nitrogen and phosphorus by biological aluminum-based P-inactivation agent (BA-PIA)

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Journal of Environmental Sciences 2023年第5期127卷 187-196页

作者： Yichao Wang shuai yuan Shupo Liu Fei Li Zhenming Zhou College of Civil Engineering Huaqiao UniversityXiamen 361021China

In this study,aluminum-based P-inactivation agent(Al-PIA)was used as a high-efficiency microbial carrier,and the biological Al-PIA(BA-PIA)was prepared by artificial *** static experiments were conducted to study the effect of BA-PIA on reducing nitrogen and phosphorus contents in *** characterization and isotope tracing method were applied to analyze the removal mechanism of nitrogen and ***-throughput techniques were used to analyze the characteristic bacterial genus in the BA-PIA *** nitrogen and phosphorus removal experiment was conducted for 30 days,and the removal rates of NH_(4)^(+)-N,TN and TP by BA-PIA were 81.87%,66.08%and 87.97%,*** nitrogen removal pathways of BA-PIA were as follows:the nitrification reaction accounted for 59.0%(of which denitrification reaction accounted for 56.4%),microbial assimilation accounted for 18.1%,and the unreacted part accounted for 22.9%.The characteristic bacteria in the BA-PIA system were Streptomyces,Nocardioides,Saccharopolyspora,Nitrosomonas,and *** loading of microorganisms only changed the surface physical properties of Al-PIA(such as specific surface area,pore volume and pore size),without changing its surface chemical *** removal mechanism of nitrogen by BA-PIA is the conversion of NH_(4)^(+)-N into NO_(2)^(−)-N and NO_(3)^(−)-N by nitrifying bacteria,which are then reduced to nitrogen-containing gas by aerobic denitrifying *** phosphorus removal mechanism is that metal compounds(such as Al)on the surface of BA-PIA fix phosphorus through chemisorption processes,such as ligand ***,BA-PIA overcomes the deficiency of Al-PIA with only phosphorus removal ability,and has better application prospects.

关键词： Biological aluminum-based P-inactivation agent(BA-PIA) Biofilms formed by artificial aeration Nitrogen Phosphorus 15N isotope tracer High-throughput sequencing analysis

Transient thermal network model for train-induced wind cooling dry-type on-board traction transformer in electric multiple units

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High Voltage 2023年第3期8卷 514-526页

作者： Lijun Zhou shuai yuan Qiuyue Zhu Dongyang Wang Lujia Wang School of Electrical Engineering Southwest Jiaotong UniversityChengduChina School of Electrical and Power Engineering China University of Mining and TechnologyXuzhouChina

Thermal characteristic is one of the key performances of dry-type on-board traction transformer(D-OBTT),which directly affects the operation safety of the new generation electric multiple ***,due to the particularity of train-induced wind cooling mode of D-OBTT,the existing efficient thermal modelling methods cannot be used under fluctuating air velocity and load.A time-saving transient thermal model for D-OBTT is ***,the framework of the transient thermal network model(TTNM)is proposed considering the coexistence of non-fully and fully developed state of the train-induced wind and the addition heat flow in the solid ***,a novel formula for calculating the length of non-fully developed section considering the geometric dimensions and heat flux density is proposed based on computational fluid dynamics(CFD)parametric sweeps for the first *** accuracy of TTNM is validated by a D-OBTT experimental setup,and the time consumption is significantly reduced compared with CFD.

关键词： traction network thermal