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Literatura académica sobre el tema "Échantillonnage in situ"
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Artículos de revistas sobre el tema "Échantillonnage in situ"
Larocque, M. y O. Banton. "Gestion de la contamination des eaux souterraines par les fertilisants agricoles: application du modèle AgriFlux". Revue des sciences de l'eau 8, n.º 1 (12 de abril de 2005): 3–20. http://dx.doi.org/10.7202/705210ar.
Texto completoSambiani, Danbenoa. "Cartographie et caractérisation écologique des formations végétales à épineux du socle Eburnéen au Togo". Revue Ecosystèmes et Paysages 3, n.º 2 (30 de diciembre de 2023): 1–11. http://dx.doi.org/10.59384/recopays.tg3218.
Texto completoBEYLOT-DAUDIGEOS, A., O. BEYLOT-DAUDIGEOS, M. ANDRIEUX, E. ROBIN, M. ROCHOY, P. VANDERKAM y B. TUDREJ. "Blogs tenus par des médecins généralistes de la communauté médicale française en 2017". EXERCER 31, n.º 161 (1 de marzo de 2020): 138–40. http://dx.doi.org/10.56746/exercer.2020.161.138.
Texto completoBonham, Oliver, Bruce Broster, David Cane, Keith Johnson y Kate MacLachlan. "The Development of Canada's Competency Profile for Professional Geoscientists at Entry-to-Practice". Geoscience Canada 44, n.º 2 (21 de julio de 2017): 77–84. http://dx.doi.org/10.12789/geocanj.2017.44.118.
Texto completoSeck, Mouhamadou Bassirou y Boubou Aldiouma Sy. "Potentiels agronomiques des Niayes de Mboro (littoral Nord du Sénégal) et risques de dégradation mécanique par ensablement : approche par analyse géomorphologique des enjeux socio-économiques". European Scientific Journal ESJ 17, n.º 20 (30 de junio de 2021). http://dx.doi.org/10.19044/esj.2021.v17n20p140.
Texto completoHARKAT, Imane y Bouba BENRACHI. "Les apports entre les transports collectifs en site propre durable et le tourisme dans la ville de Constantine". Revue Internationale de Management, d'Entrepreneuriat et de Communication, 2 de marzo de 2019. http://dx.doi.org/10.59285/rimec.315.
Texto completoKAKULE, KATUNGU y KASEREKA LULENDI. "Application des mesures d’asepsie lors du cathétérisme veineux dans les hôpitaux de BUTEMBO". Revue Congo Research Papers 3, n.º 2 (10 de agosto de 2022). http://dx.doi.org/10.59937/vozl7139.
Texto completoCouillard, Catherine M. "Utilisation des poissons pour évaluer les effets biologiques des contaminants dans l’estuaire du Saint-Laurent et le fjord du Saguenay". 22, n.º 2 (15 de junio de 2009): 291–314. http://dx.doi.org/10.7202/037486ar.
Texto completoPellerin, Jocelyne, Michel Fournier, Sophie Gauthier-Clerc, Christian Blaise, Florent Garnerot, Jean-Claude Amiard y François Gagné. "Qu’en est-il de l’état de santé des myes au Saguenay ? Un bilan d’études sur plus d’une décennie". 22, n.º 2 (15 de junio de 2009): 271–89. http://dx.doi.org/10.7202/037485ar.
Texto completoJAMHOUR, JORGE y SEBASTIÃO LAROCA. "Uma comunidade de abelhas silvestres (Hym., Apoidea) de Pato Branco (PR-Brasil): diversidade, fenologia, recursos florais e aspectos biogeográficos". Acta Biológica Paranaense 33 (31 de diciembre de 2004). http://dx.doi.org/10.5380/abpr.v33i0.626.
Texto completoTesis sobre el tema "Échantillonnage in situ"
Coquet, Yves. "Etude in situ des phénomènes de retrait-gonflement des sols : application à deux sols tropicaux peu gonflants". Orléans, 1995. http://www.theses.fr/1995ORLE2008.
Texto completoGarel, Marc. "Méthodes, procédures et techniques hyperbares pour l'étude des microorganismes du milieu profond en condition in situ". Electronic Thesis or Diss., Aix-Marseille, 2021. http://www.theses.fr/2021AIXM0378.
Texto completoThe ocean is deep, with the majority of its volume (>80%) at depths greater than 1000 m, and is poorly sampled (<0.01%). It is characterized by high hydrostatic pressure, low temperature, high inorganic nutrients and low organic carbon concentrations. Substrate input is primarily from primary production in the form of particulate and dissolved organic matter. The particulate and dissolved labile fractions are mainly consumed in surface waters by prokaryotes, leaving only a so-called refractory fraction as the only carbon source for prokaryotes in the bathypelagic zone. Most measurements of metabolic activity and diversity of bathypelagic prokaryotes are generally underestimated due to sample decompression. To study prokaryotes under in situ conditions, we have a hyperbaric technology that can be used as a ready-to-use pressurized sampler capable of collecting and maintaining samples under in situ conditions, but also to simulate the increase of hydrostatic pressure. The results highlight that by maintaining the pressure conditions, it is possible to sample piezophilic microorganisms. These results confirm our experimentation on the degradation of high molecular weight dissolved organic matter by a community adapted to the deep environment. Finally, we have also shown the importance of environmental conditions to study the fate of organic matter in the water column
Poulhet, Guillaume. "Développement et applications de capteurs passifs pour la mesure in situ des émissions de composés organiques volatils dans les environnements intérieurs". Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10168/document.
Texto completoIndoor atmospheres are rich in volatile organic compounds (VOC), with indoor concentrations 2 to 10 times higher than outdoor concentrations. Even though indoor pollution is a sanitary topical issue, the wide diversity of VOC sources and the lack of tools for the measurement in-situ of the emissions from materials make difficult the application of strategies of VOC concentration reduction.The main objectives of this thesis were to develop, to qualify and to use passive samplers into different type of buildings in order to demonstrate the potential of these cheap tools for (i) the measurement in-situ of VOC emissions and (ii) the evaluation of strategies of VOC concentration reduction. The first part of this work allowed the development and the qualification of three passives samplers for the measurement of the emissions of aldehydes (formaldehyde and acetaldehyde) and aromatic compounds (BTEX, styrene and 1,2,4-trimethylbenzene). Analytical performances are adequate for a in-situ application. In a second part, the deployment of these samplers in accommodations and schools allowed to show the potential and limits of these tools for emissions sources diagnosis in indoor environments
Lecharlier, Aurore. "Caractérisation des composés trace dans le biogaz et biométhane : développement d'une méthode d'échantillonnage, de préconcentration in situ et d'analyse". Electronic Thesis or Diss., Pau, 2022. http://www.theses.fr/2022PAUU3008.
Texto completoIn pursuance of enhancing knowledge on biogas and biomethane’s trace compounds to help guarantee their sustainable integration in today’s European energy mix, a field sampling set-up enabling direct in situ preconcentration of non-metallic trace compounds in such gas samples at their pipe working pressure (up to 200 bara) was developed. Non-metallic trace compounds targeted in this work included alkanes (linear, cyclic, polycyclic), aromatics, terpenes, alkenes, halogenated organic species, oxygenated organic species (alcohols, aldehydes, esters, furans and ethers, ketones), siloxanes, organic and inorganic Sulphur-compounds. Firstly, state-of-the-art gas sampling and preconcentration techniques for the determination of trace compounds in gaseous matrices were reviewed. Based on this review, preconcentration was chosen to be performed on self-assembled multibed adsorbent tubes (MAT). The preconcentration system was elaborated and optimized in the laboratory: convenient commercial adsorbents were selected; procedures for the assembly and conditioning of new MAT were established; four MAT configurations were tested on their efficiency in adsorbing and releasing targeted trace compounds using certified synthetic gas mixtures containing targeted species at trace concentrations (1 ppmmol) in CH4 or N2 matrices. Analytes preconcentrated on MAT were recovered for analysis by thermal desorption (TD) of the tubes using a new TD prototype followed by gas chromatography (GC) hyphenated with mass spectrometry (MS) (TD-GC-MS). Secondly, the analytical method, and in particular the new TD prototype, was validated. The chromatographic resolution power of the new TD prototype was proved to be higher than that obtained from other well established preconcentration or GC-injection methods such as solid phase microextraction or direct headspace gas injection. Besides, GC-MS parameters were optimized to detect the broad range of trace compounds potentially found in biogas and biomethane.Thirdly, the use of a novel high-pressure tube sampling (HPTS) prototype was evaluated for the circulation of pressurized gases (up to 200 bara) through MAT for the direct high-pressure preconcentration of trace compounds from such gases. The HPTS was first validated in the laboratory using pressurized certified synthetic gas mixtures, and then used on field to sample compressed biomethane at a natural gas grid injection station at 40 bara.Subsequently, the field sampling chain was set-up and 6 field sampling campaigns were conducted where 6 different streams of landfill gas, biogas and biomethane were collected at a landfill plant and two anaerobic digestion plants treating diverse feedstocks. Trace compounds were qualitatively determined in all gas samples via the developed TD-GC-MS method. In a single sampling run and using limited gas volumes ranging 0.5 – 2 LN, a wide range of trace compounds in a variety of chemical families (alcohols, aldehydes, alkenes, aromatics, alkanes (linear, cyclic and polycyclic), esters, furans and ethers, halogenated species, ketones, Sulphur-compounds, siloxanes and terpenes) were identified. Variations in trace compounds composition were observed in the different gases sampled and potential correlations between feedstocks nature, implemented gas treatment processes and trace compounds determined were discussed. In particular, the substantial generation of the mono-terpene p-cymene and of other terpenes was evidenced for anaerobic digestion plants treating principally food-wastes. It is believed the shortened and high-pressure-proof field preconcentration procedure developed in this work can contribute facilitating field sampling operations for the determination of trace compounds in complex gas matrices such as biogas and biomethane
Tawk, Melhem. "Accélération de la simulation par échantillonnage dans les architectures multiprocesseurs embarquées". Valenciennes, 2009. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/860a8e09-e347-4f85-83bd-d94ca890483d.
Texto completoEmbedded system design relies heavily on simulation to evaluate and validate new platforms before implementation. Nevertheless, as technological advances allow the realization of more complex circuits, simulation time of these systems is considerably increasing. This problem arises mostly in the case of embedded multiprocessor architectures (MPSoC) which offer high performances (in terms of instructions/Joule) but which require powerful simulators. For such systems, simultion should be accelerated in order to speed up their design flow thus reducing the time-to-market. In this thesis, we proposed a series of solutions aiming at accelerating the simulation of MPSoC. The proposed methods are based on application sampling. Thus, the parallel applications are first analyzed in order to detect the different phases which compose them. Thereafter and during the simulation, the phases executed in parallel are combined together in order to generate clusters of phases. We developed techniques that facilitate generating clusters, detecting repeated ones and recording their statistics in an efficient way. Each cluster represents a sample of similar execution intervals of the application. The detection of these similar intervals saves us simulating several times the same sample. To reduce the number of clusters in the applications and to increase the occurrence number of simulated clusters, an optimization of the method was proposed to dynamically adapt phase size of the applications. This makes it possible to easily detect the scenarios of the executed clusters when a repetition in the behavior of the applications takes place. Finally, to make our methodology viable in an MPSoC design environment, we proposed efficient techniques to construct the real system state at the simulation starting point (checkpoint) of the cluster
Gueguen, Maël. "Frequent itemset sampling of high throughput streams on FPGA accelerators". Thesis, Rennes 1, 2020. https://ged.univ-rennes1.fr/nuxeo/site/esupversions/e8b37062-120b-4a99-8834-cb2a2690a590.
Texto completoThe field of frequent pattern mining aims to discover recurring patterns from a given database. Many pattern mining approaches are available in the scientific literature, yet most of them suffer from the same drawback: there can be many output results, which contain highly redundant information. This makes such results hard to analyze. A technique called output space sampling has recently being used along frequent pattern mining for this very reason. Output space sampling consists in returning a bounded sample of the results, with statistical guarantees that ensure it is representative of the complete output. In a field where fast adaptation to trends is prevalent, an imperfect real-time analysis can be preferable over exhaustive offline analysis. To this aim, the thesis focuses its work on dedicated hardware architectures, more energy and time efficient than commonly used servers. The first contribution of the thesis is a frequent pattern mining accelerator for FPGA architectures. the proposed solution allow for a greater architectural flexibility, while reducing the cost of on-Chip memory, a scarce resource for the architecture. This first contribution proposes algorithmic improvements, to allow for a regularisation of the explored research space suited for efficient computing on FPGA. Furthermore, we propose an FPGA accelerator able to manage the heavy load of communication with its external memory. The second contribution extends the first one, restricted to static databases, to streaming databases. This requires to reconsider the theoretical basis of the sampling technique, as the value of the sample must be representative of the most recent snapshot of the stream, but also of the important trends in the close past of the stream
Crépin, Thomas. "Techniques de caractérisation aux fréquences térahertz : application aux métamatériaux". Lille 1, 2006. https://ori-nuxeo.univ-lille1.fr/nuxeo/site/esupversions/10d7b3e7-0680-4007-be1a-1412f0574f43.
Texto completoBen, Daoued Amine. "Modélisation de la conjonction pluie-niveau marin et prise en compte des incertitudes et de l’impact du changement climatique : application au site du Havre". Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2528.
Texto completoThe modeling of the combinations of flood hazard phenomena is a current issue for the scientific community which is primarily interested in urban and nuclear sites. Indeed, it is very likely that the deterministic approach exploring several scenarios has certain limits because these deterministic scenarios ensure an often excessive conservatism. Probabilistic approaches provide additional precision by relying on statistics and probabilities to complement deterministic approaches. These probabilistic approaches aim to identify and combine many possible hazard scenarios to cover many possible sources of risk. The Probabilistic Flood Hazard Assessment (PFHA) proposed in this thesis allows to characterize a quantity(ies) of interest (water level, volume, duration of immersion, ect.) at different points of interest of a site based on the distributions of the different phenomena of the flood hazard as well as the characteristics of the site. The main steps of the PFHA are: i) screening of the possible phenomena (rainfall, sea level, waves, ect.), ii) identification and probabilization of the parameters representative of the selected flood phenomena, iii) propagation of these phenomena from their sources to the point of interest on the site, iv) construction of hazard curves by aggregating the contributions of the flood phenomena. Uncertainties are an important topic of the thesis insofar as they will be taken into account in all the steps of the probabilistic approach. The work of this thesis is based on the study of the conjunction of rain and sea level and provide a new method for taking into account the temporal phase shift between the phenomena (coincidence). An aggregation model has been developed to combine the contributions of different flood phenomena. The question of uncertainties has been studied and a method based on the theory of belief functions has been used because it has various advantages (faithful modeling in cases of total ignorance and lack of information, possibility to combine information of different origins and natures, ect.). The proposed methodology is applied on the site of Le Havre in France
Libros sobre el tema "Échantillonnage in situ"
Byrnes, Mark E. Field sampling methods for remedial investigations. 2a ed. Boca Raton, Fla: CRC, 2009.
Buscar texto completoByrnes, Mark E. Field sampling methods for remedial investigations. 2a ed. Boca Raton, Fla: CRC, 2009.
Buscar texto completoHewitt, Alan D. On-site method for measuring nitroaromatic and nitramine explosives in soil and groundwater using GC-NPD: Feasibility study. Hanover, N.H: US Army Corps of Engineers, Cold Regions Research & Engineering Laboratory, 1999.
Buscar texto completoByrnes, Mark Edward. Field Sampling Methods for Remedial Investigations. Taylor & Francis Group, 2008.
Buscar texto completoByrnes, Mark Edward. Field Sampling Methods for Remedial Investigations. Taylor & Francis Group, 2008.
Buscar texto completoByrnes, Mark Edward. Field Sampling Methods for Remedial Investigations. Taylor & Francis Group, 2022.
Buscar texto completoByrnes, Mark Edward. Field Sampling Methods for Remedial Investigations. Taylor & Francis Group, 2008.
Buscar texto completoByrnes, Mark Edward. Field Sampling Methods for Remedial Investigations. Taylor & Francis Group, 2022.
Buscar texto completoField Sampling Methods for Remedial Investigations. 2a ed. CRC, 2008.
Buscar texto completoByrnes, Mark E. Field Sampling Methods for Remedial Investigations. Taylor & Francis Group, 2019.
Buscar texto completo