Littérature scientifique sur le sujet « Nuage de phase mixte »
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Articles de revues sur le sujet "Nuage de phase mixte"
Vandergucht, David. « ZFOREST : UN PROTOTYPE DE PLATEFORME WEB DE COVISUALISATION LIDAR, RASTER ET VECTEUR À GRANDE ÉCHELLE. » Revue Française de Photogrammétrie et de Télédétection 1, no 211-212 (30 décembre 2020) : 129–42. http://dx.doi.org/10.52638/rfpt.2015.551.
Texte intégralNott, Timothy J., Evangelia Petsalaki, Patrick Farber, Dylan Jervis, Eden Fussner, Anne Plochowietz, Timothy D. Craggs et al. « Phase Transition of a Disordered Nuage Protein Generates Environmentally Responsive Membraneless Organelles ». Molecular Cell 57, no 5 (mars 2015) : 936–47. http://dx.doi.org/10.1016/j.molcel.2015.01.013.
Texte intégralAITELKADI, KENZA. « Extraction des éléments de façade de bâtiments patrimoniaux à partir de données issues de scanner laser terrestre ». Revue Française de Photogrammétrie et de Télédétection, no 210 (10 avril 2015) : 39–49. http://dx.doi.org/10.52638/rfpt.2015.229.
Texte intégralde Poplavsky, C. Valette, C. Windal, C. Baussant-Crenn, J. Martin et C. Baeza-Velasco. « Étude mixte des effets de l’application Music Care sur la souffrance existentielle des patients en soins palliatifs hospitalisés à domicile et de leurs aidants naturels ». Psycho-Oncologie 14, no 4 (décembre 2020) : 158–63. http://dx.doi.org/10.3166/pson-2020-0145.
Texte intégralBailleau, Aude, Jean-Jacques Aknin et Sarah Gebeile-Chauty. « Traitements orthodontiques en une ou deux phases : comparaisons ». L'Orthodontie Française 83, no 4 (décembre 2012) : 289–96. http://dx.doi.org/10.1051/orthodfr/2012027.
Texte intégralAbdalla, F. C., et C. Cruz-Landim. « Occurrence and ultrastructural characterization of "nuage" during oogenesis and early spermatogenesis of Piaractus mesopotamicus Holmberg, 1887 (Teleostei) ». Brazilian Journal of Biology 64, no 3b (août 2004) : 555–61. http://dx.doi.org/10.1590/s1519-69842004000400002.
Texte intégralAlmairac, R., M. Siali, S. Vilminot, P. Saint Gregoire, G. Delplanque et G. Barre. « Phase incommensurable dans le composé mixte (NH4) 2(BeF4)0,82(SO4)0,18 ». Journal de Physique Lettres 46, no 23 (1985) : 1123–31. http://dx.doi.org/10.1051/jphyslet:0198500460230112300.
Texte intégralinternationale de l'OFCE, Division économie, et Département analyse. « Sur un nuage. Perspectives 1999-2000 pour l'économie mondiale ». Revue de l'OFCE 71, no 4 (1 novembre 1999) : 7–83. http://dx.doi.org/10.3917/reof.p1999.71n1.0007.
Texte intégralERIOLA, Jesse. « Dimension socioculturelle du profil des dirigeants et dynamisme des petites entreprises au Benin ». Journal of Academic Finance 11, no 2 (30 décembre 2020) : 190–208. http://dx.doi.org/10.59051/joaf.v11i2.384.
Texte intégralWampach, Jean-Pierre. « Deux siècles de croissance agricole au Québec, 1760-1985 ». Crises et développement 29, no 2-3 (12 avril 2005) : 181–99. http://dx.doi.org/10.7202/056366ar.
Texte intégralThèses sur le sujet "Nuage de phase mixte"
Aubry, Clémantyne. « Multiplatform radar-lidar synergistic retrieval for liquid and mixed-phase clouds ». Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASJ008.
Texte intégralClouds play an important role in the Earth's water cycle and radiation balance, and tend to cool the climate slightly. However, there are still many uncertainties about their feedbacks and their evolution in the context of global warming. In particular, mixed-phase clouds account for a significant proportion of the cloud radiative effect. They are composed of a mixture of ice crystals, supercooled water droplets and water vapor. This coexistence involves complex processes and the fraction of liquid and ice significantly affects their radiative properties. This complexity makes them difficult to represent in numerical models, which introduces significant biases. For this reason, it is crucial to better understand the microphysical processes of these clouds to reduce the uncertainties in climate and weather forecasts.To observe clouds, several instrument types exist, such as in situ probes (in direct contact with the hydrometeors) and remote sensing instruments (remote observations). Radar and lidar allow us to obtain distance-resolved information. They can be deployed onboard aircraft or satellites, providing regional and global coverage. Cloud radars work at frequencies (35 and 95 GHz) at which the reflectivity is sensitive to particle size, implying higher reflectivity for large cloud particles (ice crystals) than for small particles (water droplets). Lidars, on the other hand, usually operate between 355 and 1064 nm and are generally more sensitive to particle concentration. As a result, lidar backscatter is higher for highly concentrated particles, such as water droplets. Their synergy allows us to take advantage of the strengths and weaknesses of each instrument to retrieve cloud properties. However, these properties are not directly accessible from measurements and retrieval algorithms are therefore used to relate measurements to microphysical properties.This thesis proposes a new radar-lidar synergistic method dedicated to retrieve supercooled water, ice and mixed-phase cloud properties. Based on an existing method dedicated solely to ice clouds, a new approach has been developed to include both supercooled water and mixed-phase situations. The first step was to adapt and improve the classification used to identify the nature of the observed particles. Next, numerous adaptations have been applied to the algorithm to retrieve separately ice crystals and supercooled water properties. This approach is based on the different sensitivities of radar and lidar to the two types of hydrometeors: ice crystals dominate the radar signal while supercooled water dominates the lidar signal.To assess this new method, the retrievals are compared to in situ measurements from co-located observations and the literature. The first study compares retrievals from CloudSat-CALIPSO satellite data with collocated in situ airborne measurements. This comparison shows that the radar-lidar retrievals follow the same trend as the in situ measurements and provide promising results with mean percent error of 49 % for liquid water content and 75 % for ice water content, despite the quite different measurement scales and imperfect collocation. Additionally, this has been applied to the French and German airborne platforms RALI and HALO. These first results are promising and the collocated in situ data collected during recent campaigns can be used to further assess the algorithm and improve its parameterization
Gaussiat, Nicolas. « Mesure du contenu en eau et en glace des nuages en phase mixte par radars multifréquences ». Toulouse 3, 2002. http://www.theses.fr/2002TOU30216.
Texte intégralMioche, Guillaume. « Validation des produits d'inversion des observations satellitaires CALIPSO/CloudSat pour la caractérisation des propriétés optiques et microphysiques des nuages de glace et en phase mixte ». Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2010. http://tel.archives-ouvertes.fr/tel-00719316.
Texte intégralPlanche, Céline. « Développement et évaluation d'un modèle tridimensionnel de nuage mixte à microphysique détaillée : application aux précipitations orographiques ». Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2011. http://tel.archives-ouvertes.fr/tel-00622980.
Texte intégralCollombon, Mathieu. « Résonance noire à trois photons sur un nuage d'ions calcium confinés ». Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0017.
Texte intégralThe work presented in this thesis describes the complete experimental set-up and approach to realize three-photon coherent population trapping in a cloud of radiofrequency confined calcium ions. The realization of such a population trapping relies on a stringent conditions of the phase relationship between the three lasers involved in the interrogation process, and also their spectral linewidths. Our experimental approach is based on the optimization of the performance of a frequency-stabilized titanium-sapphirelaser at 411 THz (729nm) at the 10⁻¹⁴ level, in term of relative frequency uncertainties. This laser’s fre-quency stability is subsequently transfered to a optical frequency comb by means of a phase-locked loop. Then the two other lasers involved (866 nm and 794 nm) are phase-locked to the optical frequency combwith the same technique. This work describes the transfer method along with its measured performances. With all the three lasers sharing the same ultra-stable frequency reference we have been able to experi-mentally observe for the first time a 3-photon dark resonance in the fluorescence spectra of the 40 Ca⁺, signature of a coherent population trapping in a 3-photon scheme. The dependence of this resonance at experimental parameters, such as laser powers, laser detunings and local magnetic field, have been studied and are presented in this work. The preliminary results have allowed to explain the behaviour of the dark resonance and explored conditions for the use of the 3-photon dark line as a THz frequency standard
Belerrajoul, Mohamed. « Modélisation multi-échelle de la combustion d'un nuage de particules ». Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0014/document.
Texte intégralThe presence of fine particles of oxidizable materials is encountered in many industrial situations.The risk of dust explosion presents a constant threat in transformation industries that manufacture,use or manipulate powders or combustible materials dusts. In nuclear safety analysis, one of themain scenarios is the risk of graphite dust explosion that may occur during decommissioningoperations of Uranium Natural Graphite Gas reactors. The issue considered in this thesis isrelated to combustion of a dilute gas-particle mixture. This work aims at developing a macroscopicEuler-Lagrange model for predicting laminar flame velocity, which is one of the essential data forturbulent flame velocity models used to evaluate the risk of dust explosion. First, the macroscopicheat and mass transfer equations are derived using the volume averaging method. The majorinterest of the proposed approach is to provide closure problems that allow to estimate theeffective transport coefficients, such as heat exchange coefficients and the effective coefficient ofthe heterogeneous reaction. Second, Euler-Lagrange simulations are used to determine the planetwo-phase laminar flame velocity as a function of gas mixture and graphite dust characteristics.The proposed model is compared to the classical Euler-Lagrange model based on the resolutionof the boundary layer problem in the vicinity of an isolated particle in infinite medium. Results showthat the dilution rate and the indirect particle-particle exchanges are not systematically negligible inthe macroscopic exchanges between the two-phases. On the other hand, this study suggests thepotentiality of the proposed approach for detailed simulations of two-phase flow
Bourgeois, Julie. « Les ferrites du type RFe2O4 à valence mixte ». Caen, 2012. http://www.theses.fr/2012CAEN2009.
Texte intégralLuFe2O4 belongs to the rare-earth ferrite family RFe2O4 (R=Dy to Lu, Y), whose structure can be described as a stacking along c of [LuO2]∞ and [Fe2O4]∞ compact layers. This compound is attracting a lot of attention nowadays because of its multiferroic properties, linked to an antiferromagnetic spin ordering below Tn=250K and a ferroelectric state, based on a polar charge ordering of Fe2+ and Fe3+ species on a triangular lattice. In this work, two samples have been thoroughly investigated, combining synchrotron X-ray, neutron and electron diffraction techniques with magnetization, transport and dielectric constant measurements, as well as Mossbauer spectroscopy. Two main points have been evidenced: a slight monoclinic distortion of the room temperature crystal structure (SG C2/m), and a new structural modulation, dependent of the oxygen stoichiometry. The magnetic ground state of LuFe2O4 at low temperature is particularly complex, with several ferrimagnetic and antiferromagnetic magnetic phases co-existing. High pressure X-ray and neutron diffraction experiments have shown that LuFe2O4 undergoes an irreversible phase transition above 8GPa at room temperature, which could be linked with a new type of charge ordering. Below TN, increasing pressure up to the experimental limit of 3GPa leads to a decrease of the intensity of the magnetic scattering signal
Maalal, Rachid. « Propriétés diélectriques et structurales de la phase d'Aurivillius mixte Bi(7)Ti(4)NbO(21) ». Limoges, 1994. http://www.theses.fr/1994LIMO0030.
Texte intégralSofikitis, Alexandra. « Sources et évolution des formes redox du fer en phase aqueuse atmosphérique ». Paris 7, 2004. http://www.theses.fr/2004PA077171.
Texte intégralRostirolla, Gustavo. « Ordonnancement dans un centre de calculs alimenté par des sources d'énergie renouvelables sans connexion au réseau avec une charge de travail mixte basée sur des phases ». Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30160.
Texte intégralDue to the increase of cloud, web-services and high performance computing demands all over the world, datacenters are now known to be one of the biggest actors when talking about energy consumption. In 2006 alone, datacenters were responsible for consuming 61.4 billion kWh in the United States. When looking at the global scenario, datacenters are currently consuming more energy than the entire United Kingdom, representing about 1.3\% of world's electricity consumption, and being even called the factories of the digital age. Supplying datacenters with clean-to-use renewable energy is therefore essential to help mitigate climate change. The vast majority of cloud provider companies that claim to use green energy supply on their datacenters consider the classical grid, and deploy the solar panels/wind turbines somewhere else and sell the energy to electricity companies, which incurs in energy losses when the electricity travels throughout the grid. Even though several efforts have been conducted at the computing level in datacenters partially powered by renewable energy sources, the scheduling considering on site renewable energy sources and its variations, without connection to the grid can still be widely explored. Since energy efficiency in datacenters is directly related to the resource consumption of the computing nodes, performance optimization and an efficient load scheduling are essential for energy saving. Today, we observe the use of cloud computing as the basis of datacenters, either in a public or private fashion. The main particularity of our approach is that we consider a power envelope composed only by renewable energy as a constraint, hence with a variable amount of power available at each moment. The scheduling under this kind of constraint becomes more complex: without further checks, we are not ensured that a running task will run until completion. We start by addressing the IT load scheduling of batch tasks, which are characterized by their release time, due date and resource demand, in a cloud datacenter while respecting the aforementioned power envelope. The data utilized for the batch tasks comes from datacenter traces, containing CPU, memory and network values. The power envelopes considered, represent an estimation which would be provided by a power decision module and is the expected power production based on weather forecasts. The aim is to maximize the Quality of Service with a variable constraint on electrical power. Furthermore, we explore a workload composed by batch and services, where the resources consumption varies over time. The traces utilized for the service tasks originate from business critical datacenter. In this case we rely on the concept of phases, where each significant resource change in the resources consumption constitutes a new phase of the given task. In this task model phases could also receive less resources than requested. The reduction of resources can impact the QoS and consequently the datacenter profit. In this approach we also include the concept of cross-correlation to evaluate where to place a task under a power curve, and what is the best node to place tasks together (i.e. sharing resources). Finally, considering the previous workload of batch tasks and services, we present an approach towards handling unexpected events in the datacenter. More specifically we focus on IT related events such as tasks arriving at any given time, demanding more or less resources than expected, or having a different finish time than what was initially expected. We adapt the proposed algorithms to take actions depending on which event occurs, e.g. task degradation to reduce the impact on the datacenter profit
Chapitres de livres sur le sujet "Nuage de phase mixte"
Macmaster, Neil. « The caids and the commune mixte System ». Dans War in the Mountains, 56–78. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198860211.003.0004.
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