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software Vulnerabilities Overview:A Descriptive study

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Tsinghua science and Technology 2020年第2期25卷 270-280页

作者： Mario Calín sánchez Juan Manuel Carrillo de Gea José Luis Fernández-Alemán Jesús Garcerán Ambrosio Toval the Department of Informatics and systems Faculty of Computer ScienceUniversity of Murcia

Computer security is a matter of great *** the last decade there have been numerous cases of cybercrime based on the exploitation of software *** fact has generated a great social concern and a greater importance of computer security as a *** this work,the most important vulnerabilities of recent years are identified,classified,and categorized individually.A measure of the impact of each vulnerability is used to carry out this classification,considering the number of products affected by each vulnerability,as well as its *** addition,the categories of vulnerabilities that have the greatest presence are *** on the results obtained in this study,we can understand the consequences of the most common vulnerabilities,which software products are affected,how to counteract these vulnerabilities,and what their current trend is.

关键词： descriptive study software security software vulnerabilities vulnerability databases

non-spherical Gravitational Collapse of strange Quark Matter

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Chinese Physics Letters 2008年第5期25卷 1568-1570页

作者： Zade s s Patil K D Mulkalwar P n Department of Mathematics J. B. College of Science Wardha India Department of Mathematics B. D. College of Engineering Sewagram Wardha India Department of Computer science Amolakchand Mahavidyalaya Yavatmal India

We study the non-spherical gravitational collapse of the strange quark null fluid. The interesting feature which emerges is that the non-spherical collapse of charged strange quark matter leads to a naked singularity whereas the gravitational collapse of neutral quark matter proceeds to form a black hole. We extend the earlier work of Harko and Cheng [Phys. Lett. A 266 （2000） 249] to the non-spherical case.

关键词： nAKED sInGULARITIEs COsMIC CEnsORsHIP sPACETIMEs

Triad resonant wave interactions in electrically charged jets

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Applied Mathematics and Mechanics(English Edition) 2017年第8期38卷 1127-1148页

作者： s.ORIZAGA D.n.RIAHI Department of Mathematics University of Arizona Department of Mathematics University of Texas Rio Grande Valley

nonlinear instability in electrically charged jets is studied using the governing electro-hydrodynamic equations describing stretching and thinning of a liquid jet. A jet flow system subject to both space and time evolving disturbances is considered. At the linear stage, the Rayleigh and conducting jet flow instability modes are *** instability in the flow is explored via triad resonant waves which uncover favorable operating modes not previously detected in the linear study of the problem. In particular, the jet radius is significantly reduced, and the electric field of the jet is properly oriented under the nonlinear study. It is found that taking into account the resonance triad modes provides a better mathematical description of a jet that stretches and thins due to tangential electric field effects. Both linear and nonlinear instability results in the jet flow system are presented and discussed.

关键词： electrically resonant instability hydrodynamic triad Rayleigh governing thinning radius favorable

Lattice thermal conduction in cadmium arsenide

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Chinese Physics B 2022年第11期31卷 424-430页

作者： R F Chinnappagoudra M D Kamatagi n R Patil n s sankeshwar Department of Physics S.S.Government First Grade CollegeNargund-582207KarnatakaIndia Research Resource Centre Visvesvaraya Technological UniversityBelagavi-590018KarnatakIndia Department of Physics B V B College of Engineering and TechnologyHubliKarnataka 80031India Department of Physics&Electronics CHRIST(Deemed to be University)Bangalore-560029KarnatakaIndia

Lattice thermal conductivity(LTC)of cadmium arsenide(Cd_(3)As_(2))is studied over a wide temperature range(1–400 K)by employing the Callaway *** acoustic phonons are considered to be the major carriers of heat and to be scattered by the sample boundaries,disorder,impurities,and other phonons via both Umklapp and normal phonon *** calculations of LTC of Cd_(3)As_(2)bring out the relative importance of the scattering *** systematic analysis of recent experimental data on thermal conductivity(TC)of Cd_(3)As_(2)samples of different groups,presented in terms of LTC,κL,using a nonlinear regression method,reveals good fits to the TC data of the samples considered for Tnd suggests a value of 0.2 for the Gruneisen *** is,however,found that for T>100 K the inclusion of the electronic component of TC,κe,incorporating contributions from relevant electron scattering mechanisms,is needed to obtain good agreement with the TC data over the wide temperature *** detailed investigations of TC of Cd_(3)As_(2)are required to better understand its suitability in thermoelectric and thermal management devices.

关键词： dirac semimetals Cd_(3)As_(2) thermal conductivity phonon scattering

An optimized ion trap geometry to measure quadrupole shifts of ^(171)Yb~＋ clocks

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Chinese Physics B 2016年第11期25卷 230-237页

作者： n Batra B K sahoo s De Academy of scientific and Innovative Research CSIR-NPL Campus New Delhi India CsIR-national Physical Laboratory Dr. K. S. Krishnan Marg New Delhi 110012 India Theoretical Physics Division Physical Research Laboratory Navrangpura Ahmedabad 380009 India

We propose a new ion-trap geometry to carry out accurate measurements of the quadrupole shifts in the （171）Yb *** trap will minimize the quadrupole shift due to the harmonic component of the confining potential by an order of *** will be useful to reduce the uncertainties in the clock frequency measurements of the 6s 2s（1/2）→4f（13）6s2 2F（7/2）and 6s 2s（1/2）→5d2D（3/2） transitions,from which we can deduce the precise values of the quadrupole moments（0s） of the 4f（13）6s2 2F（7/2） and 5d2D（3/2） ***,it may be able to affirm the validity of the measured 0 value of the4f（13）6s22F（7/2） state,for which three independent theoretical studies defer almost by one order of magnitude from the *** also calculate 0s using the relativistic coupled-cluster（RCC） *** use these 0 values to estimate the quadrupole shift that can be measured in our proposed ion trap experiment.

关键词： validity minimize carry clock relativistic precise deduce magnitude expectation spatially

synthesis and characterization of CnT/Ce-TiO_2 nanocomposite for phenol degradation

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Journal of Rare Earths 2012年第7期30卷 651-658页

作者： shaari n Tan s H Mohamed A R school of Chemical Engineering Engineering Campus University Sains Malaysia

An innovative photocatalyst, Carbon nanotube （CnT） supported Ce-TiO2 nanocomposite was successfully synthesized via modi-fied sol gel method and investigated in a batch reactor for abolition of phenol under UV light spectrum. Characterization of catalyst micro-structure and internal properties were done by means of X-ray diffraction （XRD）, Brunauer-Emmett-Teller （BET）, scanning electron micros-copy （sEM）, transmission electron microscopy （TEM） and UV-vis diffuse reflectance spectra （DRs）. Ce doping can inhibit phase transfor-mation from anatase to rutile and eliminate the recombination of electron-hole pairs in the catalyst. The presence of CnT in TiO2 composite can both increase the photoactivity under UV and change surface properties to achieve sensitivity to visible light. The optimum mass ratio of CnT support and cerium （Ce） dopant in TiO2 was the prominent factor to harvest CnT/Ce-TiO2 photocatalyst nanocomposite. The results demonstrated that optimum mass ratio of CnT：TiO2：Ce was 0.02：1.0：0.06, which resulted in the great performance of the photocatalyst to de-grade about 94% of phenol in a 50 mg/L solution in only 3 h. In this paper, dissimilar role of CnT support and Ce dopant in the TiO2 photo-catalysis of phenol was also discussed.

关键词： carbon nanotube (CnT) cerium TiO2 nanocomposite photocatalyst phenol rare earths

IoT Information status Using Data Fusion and Feature Extraction Method

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Computers, Materials & Continua 2022年第1期70卷 1857-1874页

作者： s.s.saranya n.sabiyath Fatima Department of Computer science and Engineering B.S.Abdur Rahman Crescent Institute of Science and TechnologyVandalurChennaiTamil NaduIndia

The Internet of Things(IoT)role is instrumental in the technological advancement of the healthcare *** the hardware and the core level of software platforms are the progress resulted from the accompaniment of Medicine *** IoT systems are the emergence of this *** communication systems between the sensing nodes and the processors;and the processing algorithms to produce output obtained from the data collected by the sensors are the major empowering *** present,many new technologies supplement these empowering ***,in this research work,a practical feature extraction and classification technique is suggested for handling data acquisition besides data fusion to enhance treatment-related *** the initial stage,IoT devices are gathered and pre-processed for fusion *** Bayesian network is considered an improved balance for tractability,a tool for CDF *** Principal Component Analysis is deployed for feature extraction along with dimension ***,this data learning is attained through Hybrid Learning Classifier Model for data fusion performance *** this research,Deep Belief neural network and support VectorMachine are hybridized for healthcare data ***,the suggested system is probably a beneficial decision support tool for multiple data sources prediction and predictive ability enhancement.

关键词： IoT data fusion improved principal component analysis hybrid learning model

Mechanical, piezoelectric and some thermal properties of(B3) BP under pressure

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Journal of Central south University 2014年第1期21卷 58-64页

作者： s.DAOUD n.BIOUD n.LEBGAA Faculty of science and Technology University of Bordj Bou-Arreridj Optoelectronics and Compounds Laboratory Ferhat Abbes University

some compounds of group III-V semiconductor materials exhibit very good piezoelectric,mechanical,and thermal properties and their use in surface acoustic wave(sAW) devices operating specially at GHz *** materials have been appreciated for a long time due to their high acoustic velocities,which are important parameters for active microelectromechanical systems(MEMs) *** this object,first-principles calculations of the anisotropy and the hydrostatic pressure effect on the mechanical,piezoelectric and some thermal properties of the(B3) boron phosphide are presented,using the density functional perturbation theory(DFPT).The independent elastic and compliance constants,the Reuss modulus,Voigt modulus,and the shear modulus,the Kleinman parameter,the Cauchy and Born coefficients,the elastic modulus,and the Poisson ratio for directions within the important crystallographic planes of this compound under pressure are *** direct and converse piezoelectric coefficients,the longitudinal,transverse,and average sound velocity,the Debye temperature,and the Debye frequency of(B3) boron phosphide under pressure are also presented and compared with available experimental and theoretical data of the literature.

关键词： (B3) BP compound mechanical properties pressure and anisotropy effect thermal properties

Approximate dynamic programming solutions with a single network adaptive critic for a class of nonlinear systems

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控制理论与应用（英文版） 2011年第3期9卷 370-380页

作者： s.n.BALAKRIsHnAn Department of Mechanical and Aerospace Engineering Missouri University of Science and Technology

Approximate dynamic programming(ADP) formulation implemented with an adaptive critic(AC)-based neural network(nn) structure has evolved as a powerful technique for solving the Hamilton-Jacobi-Bellman(HJB) *** interest in ADP and the AC solutions are escalating with time,there is a dire need to consider possible enabling factors for their implementations.A typical AC structure consists of two interacting nns,which is computationally *** this paper,a new architecture,called the ’cost-function-based single network adaptive critic(J-snAC)’ is presented,which eliminates one of the networks in a typical AC *** approach is applicable to a wide class of nonlinear systems in *** order to demonstrate the benefits and the control synthesis with the J-snAC,two problems have been solved with the AC and the J-snAC *** are presented,which show savings of about 50% of the computational costs by J-snAC while having the same accuracy levels of the dual network structure in solving for optimal ***,convergence of the J-snAC iterations,which reduces to a least-squares problem,is discussed;for linear systems,the iterative process is shown to reduce to solving the familiar algebraic Ricatti equation.

关键词： Approximate dynamic programming Optimal control nonlinear control Adaptive critic Cost-functionbased single network adaptive critic J-snAC architecture