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Spatiotemporal detection of land use/land cover changes and land surface temperature using Landsat and MODIS data across the coastal Kanyakumari district, India

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Geodesy and Geodynamics 2023年第2期14卷 172-181页

作者： S.Chrisben sam Gurugnanam Balasubramanian Centre for Applied Geology The Gandhigram Rural Institute Deemed to Be UniversityDindigulTamil NaduIndia

This study assesses the changes in land use/land cover(LULC) and land surface temperature(LST) to identify their impacts from 2000 to 2020 along the coast of Kanyakumari district, India using remote sensing techniques. Landsat images are used to estimate the LULC changes and the MODIS data for *** Maximum Likelihood Classification(MLC) method is used, and the LULC is classified into six categories: Agriculture Land, Barren Land, Salt Pan, Sandy Beach, Settlement, and Waterbody. Within the two decades of the present change detection study, upheave in the Settlement area of 49.89% is noticed, and the Agriculture Land is exploited by 20.09%. Salt Pan emits a high LST of 31.57°C, and the Waterbodies are noticed with a low LST of 28.9°C. However, the overall rate of LST decreased by 0.56°C during this period. This study will help policymakers make appropriate planning and management to overcome the impact of LULC and LST in the forthcoming years.

关键词： Land use/land cover Land surface temperature Landsat MODIS and remote sensing

Element Analysis of Ceramic Coatings under Spherical Indentation with Metallic Interlayer: PartⅡRing Crack

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Journal of Materials Science & Technology 2006年第5期22卷 594-598页

作者： Minh-Quy LE Seock-sam KIM Department of Mechanics of Materials & Structures Faculty of Mechanical Engineering Hanoi University of TechnologyDai Co Viet RoadHanoiVietnam School of Mechanical Engineering Kyungpook National University Daegu 701-702Korea

Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis （FEA）. Two typical ceramic coatings with relatively high and low elastic modulus deposited on aluminum alloy and carbon steel were considered. The fracture mechanics of the ceramic coatings mechanisms due to occurrence of surface ring cracks extending traverse the coating thickness under spherical indentation are investigated within the framework of linear fracture mechanics. The J-integral associated to such cracks was computed. The evolution of J-integral vs the crack length and the indentation depth was studied. The effects of the interlayer, the coating and the substrate on the J-integral evolution were discussed. The results show that a suitable metallic interlayer can improve the fracture resistance of the coating systems under the same indentation conditions through reducing the J-integral.

关键词： Finite element analysis Ceramic coatings Indentation Interlayer Crack

Innate immunity and inflammation

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Cellular & Molecular Immunology 2017年第1期14卷 1-3页

作者： Tsan sam Xiao Department of Pathology Case Western Reserve University Cleveland OH 44106 USA

The four cardinal signs of inflammation： rubor （redness）, tumor （swelling）, calor （heat） and dolor （pain） were first documented by the Roman encyclopedist Aulus Cornelius Celsus in the first century AD. The investigation of inflammatory reaction was integrated within the context of protective phagocytosis against noxious agents innate by Elie Metchnikoff, father of and cellular immunity, who elaborated on the function of phagocytes in his lectures on Comparative Pathology of Inflammation.

关键词： AIM2

Aircraft-on-ground path following control by dynamical adaptive backstepping

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Chinese Journal of Aeronautics 2013年第3期26卷 668-675页

作者： Chen Bihua Jiao Zongxia Shuzhi sam Ge Science and Technology on Aircraft Control Laboratory Beihang University Department of Electrical & Computer Engineering National University of Singapore

The necessity of improving the air traffic and reducing the aviation emissions drives to investigate automatic steering for aircraft to effectively roll on the ground. This paper addresses the path following control problem of aircraft-on-ground and focuses on the task that the aircraft is required to follow the desired path on the runway by nose wheel automatic steering. The proposed approach is based on dynamical adaptive backstepping so that the system model does not have to be transformed into a canonical triangular form which is necessary in conventional backstepping design. This adaptive controller performs well despite the lack of information on the aerodynamic load and the tire cornering stiffness parameters. Simulation results clearly demonstrate the advantages and effectiveness of the proposed approach.

关键词： Adaptive control Aircraft-on-ground Backstepping Nonlinear dynamical systems Path following

Ion emission from warm dense matter produced by irradiation with a soft x-ray free-electron laser

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Matter and Radiation at Extremes 2024年第1期9卷 71-84页

作者： Josef Krása Tomás Burian Vera Hájková Jaromír Chalupský Šimon Jelínek Katerina Frantálová Michal Krupka Zuzana Kuglerová Sushil Kumar Singh Vojtech Vozda Ludek Vysín MichalŠmíd Pablo Perez-Martin Marion Kühlman Juan Pintor Jakub Cikhardt Matthias Dreimann Dennis Eckermann Felix Rosenthal sam M.Vinko Alessandro Forte Thomas Gawne Thomas Campbell Shenyuan Ren YuanFeng Shi Trevor Hutchinson Oliver Humphries Thomas Preston Mikako Makita Motoaki Nakatsutsumi Xiayun Pan Alexander Köhler Marion Harmand Sven Toleikis Katerina Falk Libor Juha Department of Radiation and Chemical Physics Institute of PhysicsCzech Academy of SciencesNa Slovance 218221 Prague 8Czech Republic Laser Plasma Department Institute of Plasma PhysicsCzech Academy of SciencesZa Slovankou 318200 Prague 8Czech Republic Department of Surface and Plasma Science Faculty of Mathematics and PhysicsCharles University in PragueV Holesovi ckách 218000 Prague 8Czech Republic Department of Physical Electronics Faculty of Nuclear Science and Engineering PhysicsCzech Technical University in PragueV Holesovi ckách 218000 Prague 8Czech Republic Helmholtz-Zentrum Dresden-Rossendorf Bautzner Landstraße 40001328 DresdenGermany DESY Photon Science Notkestraße 85D-22607 HamburgGermany Institut de Minéralogie de Physique des Matériaux et de CosmochimieUMR 7590–UPMC/CNRS/IRD/MNHNSorbonne Université4 place Jussieu75005 ParisFrance Department of Physics Faculty of Electrical EngineeringCzech Technical University in PragueTechnická216627 Prague 6Czech Republic Center for Soft Nanoscience University of MünsterBusso-Peus-Straße 10D-48149 MünsterGermany Department of Physics Clarendon LaboratoryUniversity of OxfordParks RoadOxford OX13PUUnited Kingdom Central Laser Facility STFC Rutherford Appleton LaboratoryDidcot OX110QXUnited Kingdom Lawrence Livermore National Laboratory 7000 East AvenueLivermoreCalifornia 94550USA European XFEL GmbH Holzkoppel 4D-22869 SchenefeldGermany Technische Universität Dresden 01062 DresdenGermany

We report on an experiment performed at the FLASH2 free-electron laser(FEL)aimed at producing warm dense matter via soft x-ray isochoric *** the experiment,we focus on study of the ions emitted during the soft x-ray ablation process using time-of-flight electron multipliers and a shifted Maxwell–Boltzmann velocity distribution *** find that most emitted ions are thermal,but that some impurities chemisorbed on the target surface,such as protons,are accelerated by the electrostatic field created in the plasma by escaped *** morphology of the complex crater structure indicates the presence of several ion groups with varying *** find that the ion sound velocity is controlled by the ion temperature and show how the ion yield depends on the FEL radiation attenuation length in different materials.

关键词： electrostatic emitted chemi

Fault depth estimation using support vector classifier and features selection

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Applied Geophysics 2013年第1期10卷 88-96,119页

作者： Mohammad Ehsan Hekmatian Vahid E. Ardestani Mohammad Ali riahi Ayyub Memar Koucheh Bagh Jalal Amini Faculty of Basic Sciences of Science and Research Branch Islamic Azad University Nuclear Fuel Cycle Research School of Nuclear Science & Technology Research Institute (NSTRI) Institute of Geophysics University of Tehran Faculty of Engineering University of Tehran

Depth estimation of subsurface faults is one of the problems in gravity interpretation. We tried using the support vector classifier （SVC） method in the estimation. Using forward and nonlinear inverse techniques, detecting the depth of subsurface faults with related error is possible but it is necessary to have an initial guess for the depth and this initial guess usually comes from non-gravity data. We introduce SVC in this paper as one of the tools for estimating the depth of subsurface faults using gravity data. We can suppose that each subsurface fault depth is a class and that SVC is a classification algorithm. To better use the SVC algorithm, we select proper depth estimation features using a proper features selection （FS） algorithm. In this research, we produce a training set consisting of synthetic gravity profiles created by subsurface faults at different depths to train the SVC code to estimate the depth of real subsurface faults. Then we test our trained SVC code by a testing set consisting of other synthetic gravity profiles created by subsurface faults at different depths. We also tested our trained SVC code using real data.

关键词： depth estimation subsurface fault support vector classifier feature featuresselection

Stability of Traveling Waves Solutions for Nonlinear Cellular Neural Networks with Distributed Delays

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Journal of Systems Science & Complexity 2022年第1期35卷 18-31页

作者： GUO Yingxin GE Shuzhi sam ARBI Adnène School of Mathematical Sciences Qufu Normal UniversityQufu 273165China Department of Electrical and Computer Engineering National University of Singapore117576Singapore National School of Advanced Sciences and Technologies of Borj Cedria University of CarthageEl Khawarizmi StreetCarthage 2078Tunisia Laboratory of Engineering Mathematics(LR01ES13) Tunisia.

This paper investigates the exponential stability of traveling wave solutions for nonlinear delayed cellular neural *** a continuity of the past work(Wu and Niu,2016;Yu,et al.,2011)on the existence and uniqueness of the traveling wave solutions,it is very reasonable and interesting to consider the exponential stability of the traveling wave *** the weighted energy method,comparison principle and the first integral mean value theorem,this paper proves that,for all monotone traveling waves with the wave speed cc2*>0,the solutions converge time-exponentially to the corresponding traveling waves,when the initial perturbations decay at some fields.

关键词： Cellular delayed neural networks comparison principle stability analysis traveling waves solutions

Coastal transgression and regression from 1980 to 2020 and shoreline forecasting for 2030 and 2040,using DSAS along the southern coastal tip of Peninsular India

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Geodesy and Geodynamics 2022年第6期13卷 585-594页

作者： S.Chrisben sam B.Gurugnanam Centre for Applied Geology The Gandhigram Rural Institute Deemed to be UniversityDindigulTamil NaduIndia

This study explains the multi-decadal shoreline changes along the coast of Kanyakumari from 1980 *** shorelines are extracted from the Landsat images to estimate the shoreline dynamics and future predictions using Digital Shoreline Analysis System(DSAS).By the estimation of End Point Rate(EPR)and Linear Regression Rate(LRR),it is quantified that the maximum erosion is 5.01 m/yr(EPR)and 6.13 m/yr(LRR)consistently with the maximum accretion of 3.77 m/yr(EPR)and 3.11 m/yr(LRR)along the entire coastal stretch of 77 *** future shoreline predicted using the Kalman filter forecasted that Inayam,Periyakattuthurai and Kodimunai are highly prone to erosion with a shift of 170 m,157 m and 145 m by 2030 and 194 m,182 m and 165 m by 2040 towards the ***,the western coast is highly prone to erosion and it is predicted that certain villages are prone to loss of economy and *** outcome of this study may guide the coastal researchers to understand the evolution and decisionmakers to evolve with alternative sustainable management plans in the future.

关键词： Shoreline change rates Future prediction DSAS Kalman filter Erosion and accretion

Stability and stabilization of a class of switched stochastic systems with saturation control

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Science China(Information Sciences) 2021年第12期64卷 147-159页

作者： Yingxin GUO Shuzhi sam GE Jianting FU Chao XU School of Mathematical Sciences Qufu Normal University Department of Electrical and Computer Engineering National University of Singapore Chongqing Institutes of Green and Intelligent Technology Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Control Science and Engineering Zhejiang University

A switching system always comprises of several subsystems and a rule supervising the switching between the subsystems. A major problem that is often inherent to all dynamical systems is actuator saturation. Saturation is a nonlinear property that nonlinearly maps small input signals to the output,which may affect the system properties and even destroy them. In this study, stability and stabilization of a class of switched stochastic systems with saturation control was investigated. First, the variation parameter method was used to present the integral form of switched stochastic systems. Second, to guarantee that the zero solution is globally exponentially stable in mean square, two sufficient conditions were obtained using direct computation with Gronwall inequality and indirect method with matrix theory, respectively. Further,another simple sufficient condition was obtained for the stability of the systems using the row norm, column norm, and Frobenius norm. Finally, two examples were used to illustrate the preciseness and effectiveness of the results. Moreover, various control designs were observed to stabilize the systems, which differ from the technique of linear matrix inequalities.

关键词： switched stochastic systems matric theory Gronwall inequality stability