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Assimilation of NDVI data in a land surface-Vegetation model for leaf area index predictions in a tree-grass ecosystem

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International Journal of Digital Earth 2023年第1期16卷 3810-3837页

作者： Nicola Montaldo Andrea Gaspa Roberto Corona Dipartimento di Ingegneria civile ambientale e architetturaUniversita di CagliariCagliariItaly

Periodic observations of vegetation index,such as the normalized difference vegetation index(NDVI),can be used for data assimilation in heterogenous ***,the new Sentinel 2 Multispectral instrument and Landsat 8 Operational Land Imager sensor data are available at such high temporal and spatial resolutions that can be used to detect the patches of the main vegetation components(grass and trees)of heterogenous ecosystems,and capture their *** demonstrate the possibility to merge grass and tree NDVI observations and models,to optimally provide robust predictions of grass and tree leaf area *** proposed assimilation approach assimilates NDVI data through the Ensemble Kalman filter(EnKF)and dynamically calibrates a key vegetation dynamic model parameter,the maintenance respiration coeffcient(ma).In the presence of large bias of the grass and tree ma base values,only the use of the proposed assimilation approach removes the large bias in the biomass balance,dynamically calibrating maintenance respiration coefficients,and corrects the *** performance of a land surface-vegetation model was improved by assimilating observations of *** effective impact of the proposed assimilation approach on the evapotranspiration and CO_(2) uptake predictions in the heterogenous ecosystem is also demonstrated.

关键词： Data assimilation leaf area index heterogenous ecosystem vegetation dynamic model Landsat 8 Sentinel 2

A semi-empirical model for top-down cracking depth evolution in thick asphalt pavements with open-graded friction courses

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第2期9卷 244-260页

作者： Francesco Canestrari Lorenzo Paolo Ingrassia Amedeo Virgili Dipartimento di Ingegneria Civile Edile e Architettura(DICEA)UniversitàPolitecnica delle MarcheAncona 60131Italy

Thick asphalt pavements with open-graded friction course(OGFC) are exposed to topdown cracking(TDC), a distress consisting of longitudinal cracks that initiate on the pavement surface close to the wheel path and propagate downwards. The main objective of this study is to develop a semi-empirical model for the prediction of TDC depth evolution for such pavements. For this purpose, a series of cores were taken from different Italian motorway pavements affected by TDC and analyzed in the laboratory. Cracked cores taken from the wheel path area were analyzed to determine TDC depth, whereas intact cores taken from the middle of the lane(not affected by traffic loadings) were tested to obtain the volumetric and mechanical properties of the OGFC mixture. The proposed model, developed on the basis of the results already available in literature and on the findings of the laboratory investigation, predicts the evolution of TDC depth as a function of the applied traffic loadings(in terms of 12-ton fatigue equivalent single axle loads, i.e., ESALs). The model is sigmoidal with a maximum TDC depth assumed equal to 150 mm. The shape parameter of the sigmoidal function depends on the indirect tensile strength(ITS) of the OGFC mixtures(which takes into account indirectly also the volumetrics and stiffness of the OGFC), whereas the evolutive translation factor depends on the age of the OGFC mixture. After excluding some outliers, the model was able to predict the measured TDC depth very well. Moreover, in-situ observations allowed a preliminary validation of the proposed model. This model can be used in pavement management systems(PMSs) to plan surface repairs due to TDC in a timely manner, thus minimizing pavement damage and maintenance costs.

关键词： Top-down cracking(TDC) Asphalt pavement Open-graded friction course(OGFC) Porous asphalt(PA) Pavement management system(PMS) Modelling

Assessment of Different Optimization Algorithms for a Thermal Conduction Problem

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Fluid Dynamics & Materials Processing 2023年第1期19卷 233-244页

作者： Mohammad Reza Hajmohammadi Javad Najafiyan Giulio Lorenzini Department of Mechanical Engineering Amirkabir University of TechnologyTehranIran Dipartimento di Ingegneria e architettura UniversitàDegli Studi di ParmaParmaItaly

In this study,three computational approaches for the optimization of a thermal conduction problem are critically *** include a Direct Method(DM),a Genetic Algorithm(GA),and a Pattern Search(PS)*** optimization aims to minimize the maximum temperature of a hot medium(a medium with uniform heat generation)using a constant amount of high conductivity materials(playing the role of fixed factor constraining the considered problem).The principal goal of this paper is to determine the most efficient and fastest option among the considered *** is shown that the examined three methods approximately lead to the same result in terms of maximum ***,when the number of optimization variables is low,the DM is the fastest *** increment in the complexity of the design and the number of degrees of freedom(DOF)can make the DM *** also show that the PS algorithm becomes faster than the GA as the number of variables for the optimization rises.

关键词： Optimization thermal conduction pattern search genetic algorithm

Radioisotope production using lasers:From basic science to applications

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Matter and Radiation at Extremes 2024年第3期9卷 31-44页

作者： M.R.D.Rodrigues A.Bonasera M.Scisciò J.A.Pérez-Hernández M.Ehret F.Filippi P.L.Andreoli M.Huault H.Larreur D.Singappuli D.Molloy D.Raffestin M.Alonzo G.G.Rapisarda D.Lattuada G.L.Guardo C.Verona Fe.Consoli G.Petringa A.McNamee M.La Cognata S.Palmerini T.Carriere M.Cipriani G.Di Giorgio G.Cristofari R.De Angelis G.A.P.Cirrone D.Margarone L.Giuffrida D.Batani P.Nicolai K.Batani R.Lera L.Volpe D.Giulietti S.Agarwal M.Krupka S.Singh Fa.Consoli Cyclotron Institute Texas A&M UniversityCollege StationTexas 77840USA Laboratori Nazionali del Sud Istituto Nazionale di Fisica Nucleare(LNS-INFN)CataniaItaly ENEA Fusion and Technologies for Nuclear Safety and Security Department-CFrascatiItaly Centro de Láseres Pulsados(clpu) VillamayorSpain Universidad de Salamanca SalamancaSpain Centre Lasers Intenses et Applications(CELIA) Universitéde BordeauxCNRSCEATalenceFrance HB11 Energy Holdings Pty FreshwaterNew South WalesAustralia School of Mathematics and Physics Queen’s University BelfastBelfastUnited Kingdom Dipartimento di Fisica e Astronomia“E.Majorana ”Università di CataniaCataniaItaly Facoltàdi Ingegneria e architettura Universitàdegli Studi di Enna“Kore”EnnaItaly Dipartimento di Ingegneria Industriale Universitàdi Roma“Tor Vergata”RomaItaly Dipartimento di Fisica e Geologia Universitàdegli Studi di PerugiaPerugiaItaly Istituto Nazionale di Fisica Nucleare Sezione di PerugiaPerugiaItaly ELI Beamlines Facility the Extreme Light Infrastructure ERICDolni BrezanyCzech Republic ETSIA Universidad Politécnica de MadridMadridSpain Dipartimento Fisica “E.Fermi”Universitàdi Pisa and INFNPisaItaly FZU–Institute of Physics of Czech Academy of Sciences PragueCzech Republic Institute of Plasma Physics of Czech Academy of Sciences PragueCzech Republic

The discovery of chirped pulse amplification has led to great improvements in laser technology,enabling energetic laser beams to be compressed to pulse durations of tens of femtoseconds and focused to a few *** with energies of tens of MeV can be accelerated using,for instance,target normal sheath acceleration and focused on secondary *** such conditions,nuclear reactions can occur,with the production of radioisotopes suitable for medical *** use of high-repetition lasers to produce such isotopes is competitive with conventional methods mostly based on *** this paper,we study the production of^(67)Cu,^(63)Zn,^(18)F,and^(11)C,which are currently used in positron emission tomography and other *** the same time,we study the reactions^(10)B(p,α)^(7)Be and^(70)Zn(p,4n)^(67)Ga to put further constraints on the proton distributions at different angles,as well as the reaction^(11)B(p,α)^(8)Be relevant for energy *** experiment was performed at the 1 PW laser facility at VegaⅢin Salamanca,*** distributions of radioisotopes in the forward(with respect to the laser direction)and backward directions were measured using a high purity germanium *** results are in reasonable agreement with numerical estimates obtained following the approach of Kimura and Bonasera[*** ***.,Sect.A 637,164–170(2011)].

关键词： purity estimates backward

Experimental characterization of the 3D linear viscoelastic behavior of cold recycled bitumen emulsion mixtures

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Journal of Traffic and Transportation Engineering(English Edition) 2019年第4期6卷 324-336页

作者： Andrea Graziani Carlotta Godenzoni Francesco Canestrari Dipartimento di Ingegneria Civile Edile e Architettura Università Politecnica delle Marche

Cold mixtures with bitumen emulsion are produced at ambient temperature, leading to substantial reductions of energy consumption and atmospheric emissions. In cold recycling applications, cement is normally used to improve the mixture performance. Thus, the rheological behavior of cold recycled mixtures is different from that of conventional hot mixtures because it is due to the interaction of fresh bitumen, aged bitumen and cementitious bonds. In this study, we investigated the three-dimensional(3 D) linear viscoelastic(LVE) behavior of a cement-bitumen treated material(CBTM) mixture fabricated using bitumen emulsion and cement. For comparison, we also investigated the 3 D LVE behavior of hot-mix asphalt containing 25% of reclaimed asphalt and fabricated using polymermodified binder. Sinusoidal axial tests on cylindrical specimens, were carried out at various temperatures(from 0℃ to 50℃) and frequencies(from 0.1 to 12 Hz). The complex Young’s modulus E~*and the complex Poisson’s ratio v~*were determined through the measurement of axial and transverse strain. We show that when considering E*, CBTM mixtures may be considered thermo-rheologically simple and the Huet-Sayegh model can be used to simulate the frequencyetemperature dependence. On the other hand, when considering v*the behavior of CBTM mixtures is very different from that of hot mix asphalt. In particular, its absolute value is almost constant and very close to 0.15.

关键词： Bitumen emulsion Cold recycling Complex modulus Complex Poisson’s ratio Huet-Sayegh model

Heat Loss from Buried Vertical Plate with Assigned Temperature Distribution

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Journal of Thermal Science 2009年第3期18卷 253-255页

作者： L.Fontana A.Quintino Dipartimento di Progettazione e Studio dell'architettura Universita degli Studi"Roma Tre" Dipartimento

Thermal losses for a buried vertical thin plate can be expressed as a function of the assigned temperature distribution,the medium conductivity and the geometrical properties that describe the model. When the geometricalproperties reduce to one, the plate-ground thermal resistance can be expressed regardless of plate dimension, dependingonly on temperature distribution given at surface plate and its temperature difference with medium.

关键词：温度分布函数热损失垂直薄板分配埋地几何属性描述模型

The Tower of Nisida as centre of 17^(th)century fortified naples system

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Frontiers of Architectural Research 2023年第2期12卷 308-318页

作者： Ignacio-Javier Gil-Crespo Concetta Cusano Claudia Cennamo Research Center“Jose´Joaquı´n de Mora”/Ca´rdenas Foundation MadridSpain Dipartimento di architettura e Disegno Industriale Universita`degli Studi della Campania“Luigi Vanvitelli”Aversa(CE)Italy

The paper investigates the territorial layout of the fortified system of Naples that developed during the Spanish Vice Kingdom in the 16th-17th *** existing castles and towers,and constructions built for the purpose,were included in the *** Tower of Nisida is one of the existing ancient towers that became part of the impressive 17th century defense system of *** study focus is on the strategic importance acquired by Nisida and its Tower in those years,when it became a key location in the fortified system,both evidencing its cruciality through the study of the field of vision that widens from the location and dealing the issue with the point of view landscape and territorial defense,recalling the concept that the defense architecture is part of architectural heritage.

关键词： Fortification Architectural heritage Territory and landscape Artillery Military architecture

Comparison of smart panels for tonal and broadband vibration and sound transmission active control

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International Journal of Smart and Nano Materials 2020年第4期11卷 431-484页

作者： Paolo Gardonio Emanuele Turco Loris Dal Bo Dipartimento Politecnico Di Ingegneria E architettura UniversitàDegli Studi Di UdineUdineItaly

This paper presents a comprehensive overview of the principal features of smart panels equipped with feed-forward and feedback systems for the control of the flexural response and sound transmission due respectively to tonal and to stochastic broadband *** smart panels are equipped with two types of actuators:first,distributed piezoelectric actuators formed either by small piezoelectric patches or large piezoelectric films bonded on the panels and second,point actuators formed by proof-mass electromagnetic ***,the panels encompass three types of sensors:first,small capacitive microphone sensors placed in front of the panels;second,distributed piezoelectric sensors formed by large piezoelectric films bonded on the panels and third point sensors formed by miniaturized *** proposed systems implement both single-channel and multi-channel feed-forward and feedback control *** study shows that,the vibration and sound radiation control performance of both feed-forward and feedback systems critically depends on the sensor-actuator configurations.

关键词： Active structural acoustic control active vibration control feed-forward control feedback control piezoelectric transducers proof-mass electromagnetic actuators

On a Measure of Non-compactness for Some Classical Operators

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Acta Mathematica Sinica,English Series 2006年第6期22卷 1847-1862页

作者： David E.EDMUNDS Alberto FIORENZA Alexander MESKHI School of Mathematics Cardiff University Dipartimentodi Costruzioni e Metodi Matematici in architettura Scuola Normale Superiore

The measure of non-compactness is estimated from below for various operators, including the Hardy-Littlewood maximal operator, the fractional maximal operator and the Hilbert transform, all acting between weighted Lebesgue spaces. The identity operator acting between weighted Lebesgue spaces and also between the counterparts of these spaces with variable exponents is similarly analysed. These results enable the lack of compactness of such operators to be quantified.

关键词： measure of non-compactness maximal functions singular integrals embeddings weight