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Enhance the Performance of Directional Feature-based Palmprint Recog.ition by Directional Response Stability Measurement

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Machine Intellig.nce Research 2024年第3期21卷 597-614页

作者： haitao Wang.Wei Jia School of Computer Science and Information Eng.neering Hefei University of TechnologyHefei230009China

Palmprint recog.ition is an emerg.ng.biometrics technolog. that has attracted increasing.attention in recent years. Many palmprint recog.ition methods have been proposed, including.traditional methods and deep learning.based methods. Among.the traditional methods, the methods based on directional features are mainstream because they have hig. recog.ition rates and are robust to illumination chang.s and small noises. However, to date, in these methods, the stability of the palmprint directional response has not been deeply studied. In this paper, we analyse the problem of directional response instability in palmprint recog.ition methods based on directional feature. We then propose a novel palmprint directional response stability measurement (DRSM) to judg. the stability of the directional feature of each pixel. After filtering.the palmprint imag. with the filter bank, we desig. DRSM according.to the relationship between the maximum response value and other response values for each pixel. Using.DRSM, we can judg. those pixels with unstable directional response and use a specially desig.ed encoding.mode related to a specific method. We insert the DRSM mechanism into seven classical methods based on directional feature, and conduct many experiments on six public palmprint databases. The experimental results show that the DRSM mechanism can effectively improve the performance of these methods. In the field of palmprint recog.ition, this work is the first in-depth study on the stability of the palmprint directional response, so this paper has strong.reference value for research on palmprint recog.ition methods based on directional features.

关键词： Biometrics palmprint recog.ition directional response stability directional coding.based methods directional feature

Janus mesoporous nanoparticles enable building.biolog.cal log.c systems

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Science China Chemistry 2024年第1期67卷 316-318页

作者： haitao Li Jian Liu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Colleg. of Chemistry and Chemical Eng.neering Inner Mongolia UniversityHohhot 010021China

This hig.lig.t is inspired by a recent article in Nature Chemistry[1],in which Zhao and co-workers from Fudan University developed an innovative emulsion-orientated anisotropic assembly method for the controllable fabrication of MSN&mPDA(mesoporous silica nanoparticles=MSN,mesoporous polydopamine=mPDA)Janus mesoporous nanoparticles and used them to build biolog.cal log.c *** reported Janus mesoporous nanoparticles have delicate structures and are well-controlled,and the authors also demonstrated the unique performance of this material at the application end.

关键词： enable emulsion silica

Establishment of a three-dimensional particle library for g.aded crushed stone based on a new ag.reg.te morpholog. characterization method

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Journal of Traffic and Transportation Eng.neering.Eng.ish Edition) 2024年第1期11卷 117-130页

作者： haitao g. Aimin Sha Zhenqiang.Han School of Future Transportation Chang'an UniversityXi'an 710064China University of Strasbourg INSA StrasbourgCNRSICubeUMR 7357Strasbourg F-67000France School of Hig.way Chang'an UniversityXi'an 710064China Key Laboratory for Special Area Hig.way Eng.neering.of Ministry of Education Chang'an UniversityXi'an 710064China

The morpholog. of g.aded crushed stone(g.S)particles has an essential influence on the performance of ag.reg.te *** impact of particle shape is a comprehensive effect that cannot be considered separately,leading.to difficulties in establishing.the relationship between the mixture properties and the ag.reg.te morpholog. by using.laboratory *** discrete element method(DEM)is an effective way widely adopted to reconstruct the morpholog. of particles and simulate performance tests of g.anular ***,selecting.limited particles characterizing.a real particle-assembly for simulation is still a challeng. in current research due to the inherent rich variability of particle *** this study,based on the acquisition of three-dimensional(3D)ag.reg.te shapes by using.laser scanning.ellipsoid index(EDI)translating.the particle shape as a function of surface area,volume,and contour leng.h is proposed to comprehensively evaluate ag.reg.te ***,a particle library capable of characterizing.ag.reg.te morpholog. distribution is established based on the statistics of the corresponding.morpholog.cal characteristics of particle *** model reliability is validated by carrying.out a series of experimental and numerical penetration tests with nine different *** established particle library can be used to model ag.reg.te mixtures and the proposed simulation framework is promising.for optimizing.the mixture g.adation desig. numerically.

关键词： Particle library Discrete element method 3D laser scanning Coarse ag.reg.te Morpholog. characterization g.adation desig.

Prog.nitor-ag. dependence of type Ia supernova luminosity and its cosmolog.cal implication

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 180-181页

作者： Yanhong.Yao Yang.Wang.haitao Miao School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China Peng.Cheng.Laboratory Shenzhen 518000China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

Empirically standardised peak luminosity of Type Ia supernovae(SNe Ia)as a standard candle has become one of the most powerful probes of the expansion history of the late *** the existence of such a consistent peak luminosity could be interpreted as a consequence of the fixed critical Chandrasekhar mass at which a carbon-oxyg.n white dwarf explodes,there is g.owing.evidence for a more complex environmental dependence to the SN Ia luminosity beyond the current understanding.of the SN Ia physics.

关键词： luminosity supernova consequence

Modeling.and analysis for material removal and surface roug.ness in fluid jet polishing.of optical g.ass

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Friction 2024年第7期12卷 1548-1563页

作者： Zhong.hen CAO Ming.WANg.haitao LIU Tian HUANg Key Laboratory of Mechanism Theory and Equipment Desig. of Ministry of Education Tianjin UniversityTianjin 300072China School of Eng.neering The University of WarwickCoventry CV47ALUK

luid jet polishing.FJP)is a non-contact polishing.technolog. that can fabricate free-form optical surfaces with sub-micron-level form accuracy and nano-level surface roug.ness,especially for hard and brittle *** surface g.neration model of FJP can be used to g.ide the determination and optimization of process parameters and is of g.eat sig.ificance for understanding.the evolution mechanism of surface ***,predictive models for the microscopic topog.aphy of polished surfaces are still *** study established a macroscopic surface profile model for predicting.3D material removal characteristics and surface texture by combining.the 3D computer fluid dynamics(CFD)simulation model and sing.e-particle erosion mechanism.A fractal theory-based erosion model has been built to calculate the material removal caused by the erosion of a sing.e abrasive particle on the roug. surface;thus,it predicts the micro-topog.aphy and surface roug.ness of the polished samples.A series of polishing.experiments were conducted to analyze the feasibility and accuracy of the model quantitatively and study the influence mechanism of process parameters on the material removal characteristics and surface *** indicated that the models could well predict material removal and surface *** prediction accuracy of the surface roug.ness Ra and maximum removal depth is better than 91.6%and 90%,*** is also found that the material removal rate of FJP could reach 0.517 mm3/min,and the surface roug.ness converg.nce rate could reach 62.9%.

关键词： fluid jet polishing.FJP) computational fluid dynamics(CFD) material removal mechanism surface roug.ness theoretical model

A toroidal SAW g.roscope with focused IDTs for sensitivity enhancement

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Microsystems & Nanoeng.neering 2024年第2期10卷 47-56页

作者： Lu Tian haitao Zhao Qiang.Shen Hong.ong.Chang Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace School of Mechanical EngineeringNorthwestern Polytechnical UniversityXi’an710072China

A surface acoustic wave(SAW)g.roscope measures the rate of rotational ang.lar velocity by exploiting.a phenomenon known as the SAW g.roscope *** a g.roscope is a g.eat candidate for application in harsh environments because of the simplification of the suspension vibration mechanism necessary for traditional microelectromechanical system(MEMS)***,for the first time,we propose a novel toroidal standing.wave-mode SAW g.roscope using.focused interdig.tated transducers(FIDTs).Unlike traditional SAW g.roscopes that use linear IDTs to g.nerate surface acoustic waves,which cause beam deflection and result in energ. dissipation,this study uses FIDTs to concentrate the SAW energ. based on structural features,resulting.in better focusing.performance and increased SAW *** experimental results reveal that the sensitivity of the structure is 1.51µV/(°/s),and the bias instability is 0.77°/s,which are improved by an order of mag.itude compared to those of a traditional SAW ***,the FIDT component can enhance the performance of the SAW g.roscope,demonstrating.its superiority for ang.lar velocity *** work provides new insig.ts into improving.the sensitivity and performance of SAW g.roscopes.

关键词： ang.lar deflection g.roscope

Influence of Hig.-Density Bedding.Plane Characteristics on Hydraulic Fracture Propag.tion in Shale Oil Reservoir

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Computer Modeling.in Eng.neering.& Sciences 2024年第9期140卷 3051-3071页

作者： Xiao Yan Di Wang.haitao Yu State Key Laboratory of Shale Oil and g.s Enrichment Mechanisms and Effective Beijing102206China State Energ. Center for Shale Oil Research and Development Beijing102206China Department of g.otechnical Eng.neering.Colleg. of Civil Eng.neering Tongji UniversityShanghai200092China Petroleum Exploration and Production Research Institute SINOPECBeijing102206China Key Laboratory of Deep Earth Science and Eng.neering.Sichuan University) Ministry of EducationChengdu610065China

The existence of hig.-density bedding.planes is a typical characteristic of shale oil *** the behavior of hydraulic fracturing.in hig.-density laminated rocks is sig.ificant for promoting.shale oil *** this study,a hydraulic fracturing.model considering.tensile failure and frictional slip of the bedding.planes is established within the framework of the unified pipe-interface element method(UP-IEM).The model developed for simulating.the interaction between the hydraulic fracture and the bedding.plane is validated by comparison with experimental *** hydraulic fracturing.patterns in sealed and unsealed bedding.planes are ***,the effects of differential stress,bedding.plane permeability,spacing.and the friction coefficient of the bedding.plane are *** results showed that a sing.e main fracture crossing.the bedding.planes is more likely to form in sealed bedding.planes under hig. differential *** decrease in bedding.plane permeability and the increase in the friction coefficient also promote the fracture propag.ting.perpendicular to the bedding.*** with hig.-density bedding.planes has a poorer fracturing.effect than that with low-density bedding.planes,as the hydraulic fracture is prone to initiate and propag.te along.the bedding.***,hig.er injection pressure is needed to maintain fracture propag.tion along.the *** increase in bedding.density will lead to a smaller fracturing.*** fluid seepag. into the bedding.planes slows shale *** is recommended that increasing.the injection flow rate,selecting.alternative fracturing.fluids,and employing.multi-well/multi-cluster fracturing.may be efficient methods to improve energ. production in shale oil reservoirs.

关键词： Hydraulic fracturing bedding.planes shale unified pipe-interface element method

Nonsing.larity of g.ain-like cascade feedback shift reg.sters subject to fault attacks

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Science China(Information Sciences) 2024年第09期67卷 184-195页

作者： haitao LI Zhaoqi LIU Wenrong.LI School of Mathematics and Statistics Shandong Normal University

Feedback shift reg.sters(FSRs) are pivotal in g.nerating.pseudorandom sequences for stream ciphers and play a crucial role in error detection and code correction. This paper investig.tes the resilience of g.ain-like cascade FSRs(g.C-FSRs) ag.inst two types of fault attacks: hard and soft. First, we introduce a new criterion for assessing.the nonsing.larity of g.C-FSRs using.the structure matrices of feedback functions,which enable the measurement of the number of nonsing.lar g.C-FSRs. Second, we demonstrate that g.C-FSRs subject to hard fault attacks become sing.lar as determined by this new criterion. Ultimately,by constructing.a soft fault bit set, we discuss the resilience of g.C-FSRs to soft fault attacks. Results demonstrate that sing.lar g.C-FSRs remain sing.lar after being.injected by soft fault attacks. Conversely,for nonsing.lar g.C-FSRs, suitable soft fault attacks are desig.ed to maintain their nonsing.lar status.

关键词： g.ain-like cascade feedback shift reg.ster fault attack nonsing.larity semi-tensor product

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Nanostructured lubricant additives for titanium alloy:Lubrication by the solid-liquid interface with Coulomb repulsion

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Friction 2024年第7期12卷 1564-1579页

作者： Linlin DUAN Dan JIA Jian LI Jianfang.LIU haitao DUAN State Key Laboratory of Special Surface Protection Materials and Application Technolog. Wuhan Research Institute of Materials ProtectionWuhan 430030China Hubei Long.hong.Laboratory Xiangyang 441000China Colleg. of Life Science and Technolog. Wuhan Polytechnic UniversityWuhan 430030China

In this work,the advantag. of Coulomb repulsion in the intermolecular forces experienced by molecules on the solid–liquid nanosized contact interface is taken,and the superior friction-reducing.property of Cu_(3)(PO_(4))2·3H_(2)O(CuP)oil-based additives has been confirmed for titanium ***-dimensional(3D)CuP nanoflowers(CuP-Fs)with a strong.capillary absorption effect are prepared to achieve the homog.neous mixing.of solid CuP and lubricating.*** by CuP-Fs additives for titanium alloy,friction coefficient(COF)can be reduced by 73.68%,and wear rate(WR)reduced by 99.69%.It is demonstrated that the extraordinary friction-reducing.property is due to the repulsive solid–liquid interface with low viscous shear force orig.nating.from Coulomb repulsion between polar water molecules in CuP and non-polar oil ***,any steric hindrance or connection between this repulsive solid–liquid interface will trig.er the adhesion and increase the viscous shear force,for example,dispersant,hydrog.n bonding.,and shaky adsorbed water ***,the lamellar thickness of CuP and the molecular size of lubricant both have a g.eat influence on tribolog.cal *** the lubrication mechanism based on interface Coulomb repulsion is proposed that may help broaden the scope of the exploration in low-friction nanomaterial desig. and new lubricant systems.

关键词： lubrication nanomaterial additive solid-liquid interface wear