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Distributed adaptive resilient formation control for nonlinear multi-agent systems under DoS attacks

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Science China(Information Sciences) 2024年第10期67卷 391-392页

作者： hao wen Yongming LI Shaocheng TONG College of Science Liaoning University of Technology

The cooperative control for multi-agent systems(MASs)with fixed topology [1–3] has been extensively studied recently. However, in practice, denial-of-service(DoS) attacks become an increasingly important issue due to... 详细信息

关键词： Directed graphs

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Low-frequency damping behavior of closed-cell Mg alloy foams reinforced with SiC particles

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International Journal of Minerals,Metallurgy and Materials 2017年第6期24卷 701-707页

作者： wen-zhan Huang Hong-jie Luo Yong-liang Mu hao Lin hao Du School of Metallurgy Northeastern University Shenyang 110819 China Engineering Research Center of the Ministry of Education for Advanced Materials Preparation Technology Shenyang 110819 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The damping properties of an Mg alloy foam and its composite foams were investigated using a dynamic mechanical thermal analyzer. The results show that the loss factors of both the Mg alloy and its composite foams are insensitive to temperature and loading frequency when the temperature is less than a critical temperature Tcrit. However, it increases when the temperature exceeds the Tcrit values, which are 200 and 250°C for the Mg alloy foam and the Mg alloy/SiCp composite foams, respectively. The Mg alloy/SiCp composite foams exhibit a higher damping capacity than the Mg alloy foam when the temperature is below 200°C. By contrast, the Mg alloy foam exhibits a better damping capacity when the temperature exceeds 250°C. The variation in the damping capacity is attributed to differences in the internal friction sources, such as the characteristics of the matrix material, abundant interfaces, and interfacial slipping caused by SiC particles, as well as to macrodefects in the Mg alloy and its composite foams.

关键词： magnesium alloys foams silicon carbide damping

Using unmodified Au nanoparticles as colorimetric probes for TNT based on their competitive reactions with melamine

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Chinese Chemical Letters 2014年第9期25卷 1271-1274页

作者： Xiao-Dong Xia hao-wen Huang Key Laboratory of Theoretical Chemistry and Molecular Simulation Minister of EducationSchool of Chemistry and Chemical EngineeringHunan University of Science and Technology

Gold nanoparticles （Au NPs） can serve as visualized colorimetric probes for various targets and modification-free sensing strategies are preferred. The donor-acceptor interaction between the electron-rich melamine （MA） and the electron-deficient trinitrotoluene （TNT） allows formation of a supramolecule in aqueous solution. Melamine alone makes the initially individual reddish Au NPs aggregate into gray/blue Au NP assemblies due to melamine forming multiple ligand sites toward the Au NPs. Interestingly, the preformed supramolecule of MA-TNT disenables aggregation of the Au NPs. Therefore the unmodified Au NPs provide facile colorimetric probes for TNT detection in aqueous solution. Rapid identification of TNT is established by naked eye inspection. By using spectrophotometer tools, quantification of TNT is accomplished with a linear range of 80μmol L-1 to 1.2 mmol/L-1 and a limit of detection （LOD） of 27μmol/L^-1. In contrast to previous strategy with surface-modified Au NPs, here a modification-free sensing strategy for TNT assay has been developed with greater convenience, rapidity, and cost-effectiveness.

关键词： Electron donor-acceptor interaction Gold nanoparticles Melamine Trinitrotoluene Colorirnetry

Static and Dynamic Integrated Analysis Scheme for Android Malware

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Journal of Electronic Science and Technology 2017年第3期15卷 246-250页

作者： Chun-hao Yung wen-Shenq Juang Department of Information Management National Kaohsiung First University of Science and Technology Kaohsiung 824

The Android platform is the most popular mobile operating *** the increase of the number of Android users,a lot of security issues have *** order to detect the malicious behaviors for the installed Android Apps,in this paper,we propose an Android malware detecting scheme by integrating static and dynamic analysis *** use Androguard and Droid Box to extract the features,and then remove the irrelevant *** we employ the support vector machine（SVM） to classify the Android malware and *** the result of our proposed scheme,the proposed integrated static and dynamic analysis scheme with SVM can effectively detect the Android malware.

关键词： Index Terms--Android dynamic analysis malware,static analysis support vector machine

Mapping wind by the first-order Bragg scattering of broad-beam high-frequency radar

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Acta Oceanologica Sinica 2021年第3期40卷 153-166页

作者： Yuming Zeng hao Zhou Zhen Tian Biyang wen School of Electronic Information Wuhan UniversityWuhan 430072China Research Center for Intelligent Chips Zhejiang LabHangzhou 311121China

Mapping wind with high-frequency(HF)radar is still a *** existing second-order spectrum based wind speed extraction method has the problems of short detection distances and low angular resolution for broadbeam HF *** solve these problems,we turn to the first-order Bragg spectrum power and propose a space recursion method to map surface *** month of radar and buoy data are processed to build a wind spreading function model and a first-order spectrum power model describing the relationship between the maximum of first-order spectrum power and wind speed in different sea *** on the theoretical propagation attenuation model,the propagation attenuation is calculated approximately by the wind speed in the previous range cell to compensate for the first-order spectrum in the current range-azimuth *** using the compensated first-order spectrum,the final wind speed is extracted in each *** first-order spectrum and wind spreading function models are tested using one month of buoy data,which illustrates the applicability of the two *** final wind vector map demonstrates the potential of the method.

关键词： high-frequency radar first-order Bragg peak broad-beam wind field wind speed

Hardware system design for UHF surface velocities radar

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Journal of Systems Engineering and Electronics 2007年第2期18卷 255-258页

作者： wen Biyang Ma Zhigang Yuan Fei Zhou hao School of Electronic Information Wuhan Univ. Wuhan 430079 P. R. China Southwest China Research Inst. of Electronic Equipment Chengdu 610036 P. R. China

UHF surface velocities radar is developed based on the successful ocean state measuring and analyzing radar system. The design method for UHF radar system is presented. It is designed to operate at UHF channel, and the transmit power is under 5W. Maximum range of field test over fresh water can be a kilometer. The field tests at Tangsun River and at Majiatan and Gaobazhou proved that USVR System can be used successfully.

关键词： UHF Surface velocities radar Bragg resonant.

Astrocyte polarization in glaucoma: a new opportunity

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Neural Regeneration Research 2022年第12期17卷 2582-2588页

作者： Yi-Xin Liu hao Sun wen-Yi Guo Department of Ophthalmology Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology ShanghaiChina

Astrocyte polarization is a new concept which is similar to microglia polarization and in which astrocytes are classified as A1(neurotoxic)and A2(neuroprotective).Several studies on astrocyte polarization have focused mainly on neurodegenerative diseases,trauma,and ***,the role of astrocyte polarization in glaucoma,a neurodegenerative disease,has not been fully *** this review,we first describe the characteristics of astrocyte astrogliosis in glaucoma,including morphological,molecular,proliferative and functional *** then summarize understanding of astrocyte polarization in other diseases,and show that A1 astrocytes are involved in the death of retinal ganglion cells in glaucoma,and that their neurotoxins kill only damaged retinal ganglion *** on this,we propose new interesting conjecture on astrocyte polarization in glaucoma:(1)That the neurotoxin from A1 astrocytes is a product of the complement system(membrane-attacking complex),since this system is known to mediate synaptic elimination and the C3 expression is clearly increased in A1 astrocytes;(2)that reactive scar-forming astrocytes in the optic nerve head may be classified as A2 astrocytes since their ablation leads to a worse prognosis in ***,current therapeutic research progress on astrocyte polarization in other diseases is also *** of astrocyte polarization can be achieved by extracellular microglia-related and intracellular *** A1 or increased A2 astrocytes can rescue the *** example,glucagon-like peptide-1 receptor agonist rescues retinal ganglion cells by reducing A1 astrocytes via the extracellular microglia-related pathway in an ocular hypertension model,suggesting that regulation of astrocyte polarization as a therapeutic target in glaucoma is feasible.

关键词： astrocytes glaucoma heterogeneity microglia neurodegenerative disease neuroinflammation neuroprotection optic nerve retina therapy

A gauge theory for two-band model of Chern insulators and induced topological defects

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Communications in Theoretical Physics 2022年第1期74卷 124-133页

作者： Zhi-wen Chang Wei-Chang hao Xin Liu Institute of Theoretical Physics Faculty of SciencesBeijing University of TechnologyBeijing 100124China School of Physics Beihang UniversityBeijing 100191China

In this paper a gauge theory is proposed for the two-band model of Chern *** on the so-calle't Hooft monopole model,a U(1)Maxwell electromagnetic sub-field is constructed from an SU(2)gauge field,from which arise two types of topological defects,monopoles and e2 *** focus on the topological number in the Hall conductance σ_(xy)=e^(2)/hC,where C is the Chern *** is discovered that in the monopole case C is indeterminate,while in the meron case C takes different values,due to a varying on-site energy *** a typical example,we apply this method to the square lattice and compute the winding numbers(topological charges)of the defects;the C-evaluations we obtain reproduce the results of the usual ***,based on the gauge theory we propose a new model to obtain the high Chern numbers|C|=2,4.

关键词： Chern insulator Chern number monopole meron

Wave Dissipation Characteristics of A Mountain-Type Breakwater

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China Ocean Engineering 2020年第6期34卷 863-870页

作者： GONG Ye-jun ZHAN Jie-min HU wen-qing FAN Qing CAI wen-hao MOE-LCSM School of Mathematics and StatisticsHunan Normal UniversityChangsha 410081China Department of Applied Mechanics and Engineering Sun Yat-sen UniversityGuangzhou 510275China

One mountain-type breakwater consisting of two inclined plates and one vertical plate is proposed based on several types of traditional free surface breakwaters, including the horizontal plate, curtain wall, and trapezoidal barriers. The interaction between the regular waves and the fixed free surface mountain-type breakwater is measured in one wave flume(15.0 m×0.6 m×0.7 m). The wave propagation, reflection, and transmission process are simulated using the VOF method and the hybrid SAS/laminar method. The simulated wave profiles are consistent with the experimental observations. For waves with a length smaller than four times width of the mountain-type breakwater, the reflected wave amplitudes are slightly larger than those of the vertical-plate breakwater, while the wave transmission coefficients are all smaller than 0.5, and the wave loss coefficients are larger than 0.7. The wave energy is dissipated by wave breaking on the windward inclined plate, and turbulent flow around the vertical plate and the leeward inclined plate.

关键词： wave-structure interaction mountain-type breakwater free surface breakwater