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Evaluating pixel-based ***-based image analysis approaches for lithological discrimination using VNIR data of WorldView-3

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Frontiers of Earth Science 2021年第1期15卷 38-53页

作者： samira shayeganpour Majid H.TANGESTANI Saeid HOMAYOUNI Robert K.VINCENT Department of Earth Sciences Faculty of SciencesShiraz UniversityShiraz ***Iran Centre Eau Terre Environnement Insitut National de la Recherche ScientifiqueQuebec QCJ3X1S2Canada Department of Geography Bowling Green State UniversityOhio 43403-0001USA

The object-based against pixel-based image analysis approaches were assessed for lithological mapping in a geologically complex terrain using Visible Near Infrared(VNIR)bands of WorldView-3(WV-3)satellite *** study area is Hormuz Island,southern Iran,a salt dome composed of dominant sedimentary and igneous *** performing the object-based image analysis(OBLA)approach,the textural and spectral characteristics of lithological features were analyzed by the use of support vector machine(SVM)***,in the pixelbased image analysis(PBIA),the spectra of lithological end-members,extracted from imagery,were used through the spectral angle mapper(SAM)*** test samples were used in a confusion matrix to assess the accuracy of classification methods *** showed that OBIA was capable of lithological mapping with an overall accuracy of 86.54%which was 19.33%greater than the accuracy of *** also reduced the salt-and-pepper artifact pixels and produced a more realistic map with sharper lithological *** research showed limitations of pixel-based method due to relying merely on the spectral characteristics of rock types when applied to high-spatial-resolution VNIR bands of WorldView-3 *** is concluded that the application of an object-based image analysis approach obtains a more accurate lithological classification when compared to a pixel-based image analysis algorithm.

关键词： object-based image analysis pixel-based image analysis lithological mapping Worldview-3 Hormuz Island spectral angle mapper support vector machine

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Integer quantum Hall effect in Kekulé-patterned graphene

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Chinese Physics B 2022年第1期31卷 553-560页

作者： Yawar Mohammadi samira Bahrami Department of Physics Farhangian UniversityTehranIran

Y-shaped Kekulébond textures in a honeycomb lattice on a graphene-copper superlattice have recently been experimentally *** this paper,the effects of such a bond modulation on the transport coefficients of Kekulé-patterned graphene are investigated in the presence of a perpendicular magnetic *** expressions are derived for the Hall and longitudinal conductivities using the Kubo *** is found that the Y-shaped Kekulébond texture lifts the valley degeneracy of all Landau levels except that of the zero mode,leading to additional plateaus in the Hall conductivity accompanied by a split of the corresponding peaks in the longitudinal ***,the Hall conductivity is quantized as±ne^(2)/h for n=2,4,6,8,10,...,excluding some plateaus that disappear due to the complete overlap of the Landau levels of different *** results also suggest that DC Hall conductivity measurements will allow us to determine the Kekulébond texture amplitude.

关键词： AAA-stacked trilayer graphene integer quantum Hall effect Kubo formula Hall conductivity

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Parametric Estimation of Interconnected Nonlinear Systems Described by Input-output Mathematical Models

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International Journal of Automation and computing 2016年第4期13卷 364-381页

作者： Mourad Elloumi samira Kamoun Laboratory of Sciences and Techniques of Automatic Control & Computer Engineering National Engineering School of Sfax (ENIS) University of Sfax Tunisia B.P. 1173 3038 Sfax Tunisia

In this paper, two types of mathematical models are developed to describe the dynamics of large-scale nonlinear systems, which are composed of several interconnected nonlinear subsystems. Each subsystem can be described by an input-output nonlinear discrete-time mathematical model, with unknown, but constant or slowly time-varying parameters. Then, two recursive estimation methods are used to solve the parametric estimation problem for the considered class of the interconnected nonlinear systems. These methods are based on the recursive least squares techniques and the prediction error method. Convergence analysis is provided using the hyper-stability and positivity method and the differential equation approach. A numerical simulation example of the parametric estimation of a stochastic interconnected nonlinear hydraulic system is treated.

关键词： Large-scale nonlinear systems interconnected nonlinear systems deterministic systems stochastic systems input-outputmathematical models parametric estimation algorithm convergence analysis.

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Robust Self-tuning Control Based on Discrete-time Sliding Mode for Auto-regressive Mathematical Model in the Presence of Unmodelled Dynamics

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International Journal of Automation and computing 2016年第3期13卷 277-284页

作者： Nabiha Touijer samira Kamoun Laboratory of Sciences and Techniques of Automatic Control and Computer Engineering (Lab-STA) National School of Engineering of SfaxUniversity of Sfax

In this paper, we propose a new robust selfbtuning control, called the generalized minimum variance a/-equivalent self- tuning control （GMVSTC-a/） for the linear timevarying （LTV） systems, which can be described by the discrete-time auto-regressive exogenous （ARX） mathematical model in the presence of unmodelled dynamics. The estimation of the parameters contained in this mathematical model is made on the basis of the proposed modified recursive least squares （m-RLS） parametric estimation algorithm with dead zone and forgetting factor. The stability analysis of the proposed parametric estimation algorithm m-RLS is treated on the basis of a Lyapunov function. A numerical simulation example is used to prove the performances and the effectiveness of the explicit scheme of the proposed robust self-tuning control GMVSTC-a/.

关键词： Discrete-time systems parametric uncertainty robust estimation robust self-tuning control sliding mode control sta-bility.

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Green,mild and efficient bromination of aromatic compounds by HBr promoted by trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxolane in water as a solvent

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Chinese Chemical Letters 2012年第4期23卷 387-390页

作者： Kaveh Khosravi samira Kazemi Department of Chemistry Faculty of ScienceUniversity of Arak Department of Chemistry Shahr-e-Rey branchIslamic Azad University

A combination of HBr and trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxolane as anew and powerful oxidant was found effective for facile brotnination of different aromatic compounds at room temperature in water as a green *** reaction conditions,high selectivity and yield,high reaction rate and non-toxicity are some of the major advantages of this synthetic protocol.

关键词： Trans-3 5-dihydroperoxy-3 5-dimethyl-1 2-dioxolane HBr Bromination Anilines Phenoles

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Cerium(Ⅳ)oxide nanocomposites:Catalytic properties and industrial application

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Journal of Rare Earths 2021年第2期39卷 129-139页

作者： samira Bagheri Ibrahim Khalil Nurhidayatullaili Muhd Julkapli Nanotechnology and Catalysis Research Centre(NANOCAT) Institute for Advanced StudiesLevel 3Block AUniversity of Malaya50603 Kuala LumpurMalaysia

This review article provides a new insight on the application of cerium oxide(CeO_(2))-metal oxide nanocomposites as catalyst with enhanced reducibility and improved oxygen(O_(2))storage capacity,especially in the varying chemical reaction processes including combustion,oxidation,epoxidation and *** CeO_(2)-metal oxide interaction plays an important role in controlling particle size,O_(2) availability and coke resistance properties of the *** metal oxide-CeO_(2) interaction also assists in generating small and highly dispersed particles,resists sintering of catalyst particles during the catalysis process,and consequently improves the O_(2) availability of the ***,CeO_(2) not only provides an active support to heterogeneous catalyst,but also creates a new active site at the metal-support interface to produce stronger nanoparticle bonding through the surface O_(2) *** consequently produces a heterogeneous catalytic system with promising reaction rate and catalytic stability in many industrial applications such as CO_(2) hydrogenation,CO oxidatio n,biodiesel productio n,gas reduction,photocatalytic and methane steam reforming.

关键词： Interface Composition Synergistic effect Active species Physiochemical Rare earths

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Meeting peak electricity demand through combinatorial reverse auctioning of renewable energy

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Journal of Modern Power Systems and Clean Energy 2018年第1期6卷 73-84页

作者： Shubhashis Kumar SHIL samira SADAOUI Department of Computer Science University of Regina

The option of organizing E-auctions to purchase electricity required for anticipated peak load period is a new one for utility *** meet the extra demand load,we develop electricity combinatorial reverse auction(CRA)for the purpose of procuring power from diverse energy *** this new,smart electricity market,suppliers of different scales can participate,and homeowners may even take an active *** our CRA,an item,which is subject to several trading constraints,denotes a time slot that has two conflicting attributes,electricity quantity and *** secure electricity,we design our auction with two bidding rounds:round one is exclusively for variable energy,and round two allows storage and nonintermittent renewable energy to bid on the remaining *** electricity auction leads to a complex winner determination(WD)task that we represent as a resource procurement optimization *** solve this problem using multi-objective genetic algorithms in order to find the trade-off solution that best lowers the price and increases the *** solution consists of multiple winning suppliers,their prices,quantities and *** validate our WD approach based on large-scale simulated *** first assess the time-efficiency of our WD method,and we then compare it to well-known heuristic and exact WD *** order to gain an exact idea about the accuracy of WD,we implement two famous exact algorithms for our constrained combinatorial procurement problem.

关键词： Renewable energy auctions Combinatorial reverse auctions Electricity auctions Retail markets Winner determination Genetic algorithms Multi-objective optimization

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Rapid and mild synthesis of quinazolinones and chromeno[d]pyrimidinones using nanocrystalline copper(Ⅰ)iodide under solvent-free conditions

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Chinese Chemical Letters 2016年第1期27卷 114-118页

作者： Shahrzad Abdolmohammadi samira Karimpour Department of Chemistry Faculty of Science East Tehran Branch Islamic Azad University

This paper describes a very simple, efficient synthesis of quinazolinones and chromeno[d]pyrimidinones from the reaction of aryl aldehydes, urea/thiourea and active methylene compounds（dimedone/4-hydroxycoumarin） using nano-sized CuI particles under solvent-free conditions. The highlights of this new method are based on using an effective and recyclable catalyst, affording high yields of products,mild reaction conditions, facile work-up and purification.

关键词： Chromeno[d]pyrimidinones Copper(Ⅰ) iodide nanoparticles Quinazolinones Solvent-free conditions

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Synthesis of 2-arylbenzimidazoles and 2-arylbenzothiazoles in both room temperature and microwave condition catalyzed by hexamethylenetetramine-bromine complex

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Chinese Chemical Letters 2012年第1期23卷 61-64页

作者： Kaveh Khosravi samira Kazemi Department of Chemistry Faculty of ScienceUniversiy of ArakArak 38/56-8-8349Iran Tehran Shahid tondgoyan Oil Refinery Company TehranIran

One-pot condensation of 2-aminothiophenol or 1,2-phenylenediamine with different aldehydes has been catalyzed by hexamethylenetetramine-bromine（HMTA-Bromine） as new,available and effective catalyst.2-Arylbenzo thiaz... 详细信息

关键词： Benzothiazoles Benzimidazoles One-pot condensation 1 2-Phenylenediamine 2-Aminothiophenol Hexamethylene-tetramine-bromine Microwave condition

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Flexible atomic buckling and homogeneous edge states in few-layer Bi(110)films

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Nano Research 2022年第3期15卷 2374-2381页

作者： Yanfeng Lyu samira Daneshmandi Shuyuan Huyan Chingwu Chu Department of Physics and Texas Center for Superconductivity University of HoustonHoustonTexas 77204USA Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720USA

The structure and edge states of two-dimensional few-layer Bi(110)films grown on a graphene/SiC substrate were studied by low-temperature scanning tunneling microscopy and *** found that the local density of states of few-layer Bi(110)films are layer-dependent and that the films transition from exhibiting semiconducting characteristics to metallic ones as the number of layers *** in-plane lattice structure has numerous displacements and inversions,which implies that the atomic arrangement and atomic buckling in ultrathin Bi(110)films are *** edges formed between 4-monolayer Bi(110)and graphene are reconstructed and distorted,and the corresponding edge states are topographically *** from the substrate and domain boundaries also modify the electronic structures and induce additional defect-dependent *** also found that the zigzag-shaped step edges in few-layer Bi(110)films are nonreconstructed and possess layer-dependent homogeneous edge states,providing a very likely platform for further research on quantum interference of the edge mode in order to confirm the topology in Bi(110).

关键词： few-layer Bi(110)films lattice displacement and inversion distortion zigzag edge edge states

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