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Статті в журналах з теми "Échantillonnage de gaz sur le terrain"
Dorioz,, J. M., A. Orand, E. Pilleboue, P. Blanc, M. Colon, and J. P. Bosse. "Prélèvement et échantillonnage dans les petits bassins-versants ruraux." Revue des sciences de l'eau 4, no. 2 (April 12, 2005): 211–38. http://dx.doi.org/10.7202/705097ar.
Повний текст джерелаGérôme, Noëlle. "L'anthropologie industrielle sur le terrain : une expérience poitevine." Anthropologie et Sociétés 10, no. 1 (September 10, 2003): 59–70. http://dx.doi.org/10.7202/006320ar.
Повний текст джерелаCHEVALIER, J. M., L. AIGLE, and L. JOURNAUX. "Réchauffement des solutés sur le terrain : intérêt et approche pratique." Revue Médecine et Armées, Volume 43, Numéro 5 (December 1, 2015): 533–40. http://dx.doi.org/10.17184/eac.6937.
Повний текст джерелаRakotomala, F. A. "ESTIMATION DE LA DEFORESTATION DES FORETS HUMIDES A MADAGASCAR UTILISANT UNE CLASSIFICATION MULTIDATE D’IMAGES LANDSAT ENTRE 2005, 2010 et 2013." Revue Française de Photogrammétrie et de Télédétection 1, no. 211-212 (December 30, 2020): 11–23. http://dx.doi.org/10.52638/rfpt.2015.537.
Повний текст джерелаLarocque, M., and O. Banton. "Gestion de la contamination des eaux souterraines par les fertilisants agricoles: application du modèle AgriFlux." Revue des sciences de l'eau 8, no. 1 (April 12, 2005): 3–20. http://dx.doi.org/10.7202/705210ar.
Повний текст джерелаMetay, A., B. Mary, D. Arrouays, J. Labreuche, M. Martin, B. Nicolardot, and J. C. Germon. "Effets des techniques culturales sans labour sur le stockage de carbone dans le sol en contexte climatique tempéré." Canadian Journal of Soil Science 89, no. 5 (November 1, 2009): 623–34. http://dx.doi.org/10.4141/cjss07108.
Повний текст джерелаCourte, Amandine, Nathalie Cialdella, Alexandre Muller, Vincent Blanfort, Jean-Luc Bochu, and Michel Brossard. "Recenser et évaluer les pratiques agricoles qui stockent le carbone des sols, premier pas vers une agriculture à faible impact en Guyane." Cahiers Agricultures 29 (2020): 21. http://dx.doi.org/10.1051/cagri/2020019.
Повний текст джерелаThébaud, Gilles, Guillaume Choisnet, and Camille Roux. "Contribution to the survey of the heathlands of the french Massif central (habitats 4030 and 4060) : analysis of phytosociological data." BIOM - Revue scientifique pour la biodiversité du Massif central 2, no. 1 (June 1, 2021): 62–109. http://dx.doi.org/10.52497/biom.v2i1.283.
Повний текст джерелаEL MDERSSA, Mohamed. "Détermination des paramètres d’évaluation du stock de carbone dans les écosystèmes forestiers (Cedrus atlantica Manetti, cèdre de l’Atlas au Maroc) : méthodes spécifiques et génériques." BOIS & FORETS DES TROPIQUES 351 (February 28, 2022): 67–77. http://dx.doi.org/10.19182/bft2022.351.a36330.
Повний текст джерелаFabiyi, Oluseyi O., and Glory O. Enaruvbe. "Coastal Land Subsidence and Morphological Changes within Nigerian Coastal Areas." Journal of Geospatial Science and Technology 1, no. 1 (November 1, 2014): 146–60. http://dx.doi.org/10.54222/afrigist/jgst/v1i1.9.
Повний текст джерелаДисертації з теми "Échantillonnage de gaz sur le terrain"
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.
Повний текст джерелаIn 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
Garcia-Fouqué, Segunda. "Étude de la mesure de l'ozone par tube à diffusion : application sur le terrain." Compiègne, 1998. http://www.theses.fr/1998COMP1162.
Повний текст джерелаDussault, Frédéric. "Hygiène et considérations hygiéniques des Inughuits du nord-ouest du Groenland : étude archéoentomologique des sites d'lita, Cap Grinnell et Qaqaitsut au Groenland." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28353/28353.pdf.
Повний текст джерелаDogaru, Emanuel. "Built-In Self-Test of Flexible RF Transmitters Using Nonuniform Undersampling." Thesis, CentraleSupélec, 2015. http://www.theses.fr/2015SUPL0004/document.
Повний текст джерелаThe advent of increasingly powerful Integrated Circuits (IC) has led to the emergence of the Software Defined Radio (SDR) concept, which brought the sector of secured mobile communications into a new era. The outstanding performance of these systems results from optimal trade-offs among advanced analog/Radio Frequency (RF) circuitry, high-speed reconfigurable digital hardware and sophisticated real-time software. The inherent sophistication of such platforms poses a challenging problem for product testing. Currently deployed industrial test strategies face rising obstacles due to the costlier RF test equipment, longer test time and lack of flexibility. Moreover, an SDR platform is field-upgradeable, which means it will support standards and scenarii not considered during the design phase. Therefore, an in-field test strategy is not anymore 'a nice to have' feature but a mandatory requirement. In this context, our research aims to invent and develop a new test methodology able to guarantee the correct functioning of the SDR platform post-fabrication and over its operational lifetime. The overall aim of our efforts is to reduce post-manufacture test cost of SDR transceivers by leveraging the reconfigurability of the platform.For tactical radio units that must be field-upgradeable without specialized equipment, Built-in Self-Test (BIST) schemes are arguably the only way to ensure continued compliance to specifications. In this study we introduce a novel RF BIST architecture which uses Periodically Nonuniform Sampling (PNS2) of the transmitter (TX) output to evaluate compliance to spectral mask specifications. Our solution supports a stand-alone implementation, is scalable across a wide set of complex specifications and can be easily applied for in-field testing with small added hardware. Compared to existing analog/RF test techniques, this approach is not limited to a given TX architecture and does not rely on an ad-hoc TX model, which makes it ideal for SDR testing