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Artykuły w czasopismach na temat "Jauge de pression"
SUQUET, M., C. FAUVEL i J. J. GAIGNON. "La domestication des Gadidés : le cas de la morue et du lieu jaune". INRAE Productions Animales 17, nr 3 (29.07.2004): 177–82. http://dx.doi.org/10.20870/productions-animales.2004.17.3.3588.
Pełny tekst źródłaMingelbier, Marc, Yves Paradis, Philippe Brodeur, Véronik de la Chenelière, Frédéric Lecomte, Daniel Hatin i Guy Verreault. "Gestion des poissons d’eau douce et migrateurs dans le Saint-Laurent : mandats, enjeux et perspectives". Le Naturaliste canadien 140, nr 2 (2.06.2016): 74–90. http://dx.doi.org/10.7202/1036506ar.
Pełny tekst źródłaAlexandra Heathcote, Paulson Des Brisay, Christopher De Ruyck, Paula Grieef i Nicola Koper. "Morphological traits of four land bird species in Grenada". Journal of Caribbean Ornithology 34 (17.05.2021): 41–52. http://dx.doi.org/10.55431/jco.2021.34.41-52.
Pełny tekst źródła"Rouge, jaune, vert – les patients évaluent eux-mêmes leur pression". PrimaryCare 15, nr 22 (25.11.2015): 392–93. http://dx.doi.org/10.4414/pc-f.2015.01121.
Pełny tekst źródłaXu, Dandan, Lingling Cao, Xia Chen i Lunguang Yao. "First report of powdery mildew caused by Erysiphe cruciferarum on spider flower (Tarenaya hassleriana) in China". Plant Disease, 3.05.2023. http://dx.doi.org/10.1094/pdis-10-22-2440-pdn.
Pełny tekst źródłaRozprawy doktorskie na temat "Jauge de pression"
Kervran, Yannick. "Cartographie d'un champ de pression induit par l'occlusion dentaire". Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S077.
Pełny tekst źródłaDental occlusion diagnosis is still a major challenge for dentists. A couple of tools are dedicated to occlusal analysis, such as articulating papers and the T-Scan® system, but they are limited for various reasons. That's why, the goal of this thesis is to develop a novel system consisting in pressure sensor arrays on flexible substrates combining the positive aspects of both previously cited tools: an electronic and computerized system, on a very thin non-invasive flexible substrate. We chose a piezoresistive technology based on microcrystalline silicon strain gauges and 25-µm- or 50-µm-thick Kapton® substrates. Microcrystalline silicon is deposited directly on plastic at low temperature (< 200°C) using PECVD technique (Plasma Enhanced Chemical Vapor Deposition) in a cost-effective solution perspective. Strain gauges have firstly been characterized using bending tests. Longitudinal and transversal gauge factors have been studied in order to understand the behavior of our deposited materials under bending. Those gauges remained functional until strains up to 0.6 % and degradations appeared for higher values. These values correspond to bending radius on the order of 1 mm for 25-µm-thick substrates. Then, those gauges have been integrated in arrays with two different designs: one was an 800-element array to study the occlusal surface of one tooth, and the second was a 6400-element array to study the occlusal surface of a hemiarcade. Those prototypes have showed interesting correlations between articulating paper marks and our electrical responses during characterizations using a dental articulator to simulate a human jaw. Thus, we have developed in this work a proof-of-concept of a flexible strain sensor using microcrystalline silicon dedicated to dental occlusion diagnosis
Langlois, Patrick. "Contribution à l'élaboration de capteurs de pression à jauges de contrainte en couches minces de Constantan". Rouen, 1987. http://www.theses.fr/1987ROUES039.
Pełny tekst źródłaGenevois, Julia. "Etude du comportement de céramiques à blindage sous chargement de compression haute-vitesse par essais d’impact de plaque plan ou sans choc". Electronic Thesis or Diss., Université Grenoble Alpes, 2023. http://www.theses.fr/2023GRALI106.
Pełny tekst źródłaCeramic materials are widely used in armour or protective structures providing weight savings for equivalent performance compared to their steel counterparts. In these conditions, they experience extreme damage, micro-plasticity and fragmentation mechanisms. To fully understand these behaviours, characterization under high-strain-rate compression needs to be conducted. Several experimental techniques, such as the plate-impact test, are used to investigate the dynamic behaviour of ceramic under high compressive loading. During this experiment, a flyer plate (often made of a metallic material) strikes the target, and some mechanical properties such as the HEL (Hugoniot Elastic Limit) as well as the Hugoniot curve of the material can be deduced from the rear side velocity measured at the back of the target. Nevertheless, this test do not provide a controllable loading-rate in the target and the hardening behaviour cannot be directly deduced.One of the aims of this thesis was to develop and implement an experimental shockless plate-impact configuration enabling Lagrangian Analysis. The various experimental campaigns were carried out using the 3SR laboratory launcher. The use of wavy flyer plates to generate a loading ramp was validated using tests on 316L steel, which has the asset of not changing phase in the range of studied stresses. Two ceramics, F99.7 alumina and Forceram SiC, were then studied in this configuration. These tests coupled with Lagrangian analysis enable to obtain the curve of axial stress as a function of axial strain beyond the HEL.At the same time, some other plate impact configurations were developed to characterise the temporal profiles of axial and radial stresses in the ceramic. This configuration is based on the use of Manganin piezoresistive gauges. These tests were carried out on steel and alumina targets. The results were compared with the ones obtained by rear side velocity measurements during the same tests.The experimental results from the thesis were compared with numerical finite element simulations based on a JH2-type (Johnson–Holmquist) plasticity model. These calculations were used to identify the parameters of the ceramic behaviour model thanks to an inverse approach. It helps providing a better understanding of the mechanical behaviour of these materials under such loading conditions. Nevertheless, other tests, in particular triaxial tests, could be further considered in order to complete the identification of a constitutive model for these microstructures under intermediate confinement pressures
Duffuler, Pauline. "Extraction de la phosvitine de la granule du jaune d'œuf par le procédé à hautes pressions hydrostatiques". Master's thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/35847.
Pełny tekst źródłaPhosvitin, present in egg yolk, has demonstrated interesting functional and technological properties. Recent studies have showed that high hydrostatic pressure (HHP) induced the transfer of folic acid and phosvitin from the granule to the plasma of egg yolk at 400 MPa for 5 min. This project aims to optimize the pressurization parameters and destabilization of egg yolk granule to maximize the phosvitin extraction. For that purpose, a granule generated after egg yolk centrifugation was firstly pressurized at 400 and 600 MPa during 5 and 10 min. The control and pressure-treated granules were centrifuged to generate a second precipitate and supernatant. The protein profiles of egg yolk fractions were obtained by par sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS-PAGE). The peptide mass fingerprint of phosvitin bands was obtained by mass spectrometry. The mineral and acid folic content was obtained by induction couples plasma-optic emission spectrofluorimetry (ICP-OES) and high protein liquid chromatography (HPLC), respectively. Finally, the extraction/yield rate was calculated after fast protein liquid chromatography (FPLC) analysis. Results obtained by SDS-PAGE showed that the band intensity corresponding to the phosvitin in pressured-treated plasma fractions increased according to the HHP treatment severity. This was further confirmed by an increase of iron and phosphorus content in these same fractions since phosvitin is an iron-binding phosphoprotein. The highest phosvitin concentration and purity rate were 33.3% and 40.05%, respectively at 600 MPa for 10 min. The potential mechanism resulting to the transfer of phosvitin from granule to plasma and the potential interaction of phosvitin with folic acid need further investigations.
Plantier, Christophe. "Etude de faisabilité de capteurs de pression piézorésistifs à jauges en silicium polycristallin". Toulouse 3, 1992. http://www.theses.fr/1992TOU30157.
Pełny tekst źródłaAndrei, Alexandru. "Fiabilité des microcapteurs de pression piézorésistifs à jauges en polysilicium pour environnements sévères". Lyon, INSA, 2005. http://www.theses.fr/2005ISAL0035.
Pełny tekst źródłaOn-board sensor’s market has recently known a significant growth, with an increasing application diversification. For these components, supporting frequently an extended exposure to harsh environments (important temperature variations, corrosion), reliability has become an essential aspect of their design and fabrication. Today, the research is focused on the analysis, the modeling and on the failure mechanisms understanding. These mechanisms are rather often more complex that those well known in the microelectronics research field, mainly because of the mechanics involved in the micro-system that are not present in the integrated circuit functioning. The main objective of the present work was the study of the physical phenomena that are responsible of the PSOI pressure sensor’s aging. After pointing out the environmental accelerating factors that contribute to the irreversible sensor’s output drift, the responsible sensor’s components had been identified. The study has been conducted on multiple levels, from the material properties analysis to the full packaged sensor device. It has been experimentally found that the grater irreversible drift appears after an extended of the sensor at a high constant temperature (125°C). Only the sensor’s offset changes over time, which has been explained by an aging of the interconnections (metal lines and ohmic contacts). These observations have been validated by a physical model capable of relating the materials properties to the full pressure sensor behavior
Langlois, Patrick. "Contribution à l'élaboration de capteurs de pression à jauges de contraintes en couches minces de constantan". Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37606976j.
Pełny tekst źródłaGiarratano, Mélanie, i Mélanie Giarratano. "Combinaison des hautes pressions hydrostatiques et de l'ultrafiltration pour générer un nouvel ingrédient fonctionnel à partir du jaune d'oeuf". Master's thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/38302.
Pełny tekst źródłaLa phosvitine (45 kDa) de la granule du jaune d’oeuf est une phosphoprotéine reconnue pour ses propriétés émulsifiantes. Un traitement de la granule par hautes pressions hydrostatiques (HPH) a récemment permis le transfert de la phosvitine vers le plasma, la fraction soluble diluée. Ainsi, ce projet avait pour objectif d’évaluer les performances du procédé d’ultrafiltration (UF) lors de la concentration du plasma enrichi en phosvitine afin de générer un ingrédient aux propriétés émulsifiantes améliorées. Une pressurisation (400 MPa, 5min) a été appliquée sur une granule (G1) (10 % m/m), afin d’obtenir après centrifugation, une deuxième granule (G2) et un plasma (P2). Le P2 a été ultrafiltré sur une membrane en polyéthersulfone de 10 kDa pour concentrer la phosvitine. La phosvitine a été identifiée et caractérisée dans le P2 pressurisé (1,73 % m/m) et son rétentat d’UF (26,00 % m/m), validant sa rétention totale par la membrane d’UF. Des flux de perméation similaires ont été obtenus durant l’UF, et ce peu importe les conditions, démontrant que la présence de phosvitine n’impacte pas les performances du procédé. Par conséquent, la combinaison des HPH et de l’UF s’est avérée efficace pour la récupération sélective de la phosvitine et sa concentration. Les propriétés émulsifiantes des rétentats (témoin et pressurisé) ont été évaluées. L’émulsion préparée avec le rétentat enrichi en phosvitine était plus stable à la floculation et au crémage. La microscopie confocale à balayage laser a montré un réseau de protéines agrégées dans lequel sont encapsulées les gouttelettes d’huile, dans l’émulsion avec le rétentat enrichi en phosvitine. Le profil protéique de la crème a montré la présence de plusieurs protéines dont la β-phosvitine, suggérant un effet positif de la β-phosvitine sur les propriétés émulsifiantes du rétentat d’UF enrichi en phosvitine par pressurisation et centrifugation de la granule du jaune d’oeuf.
Phosvitin (45 kDa) from egg yolk granule is a phosphoprotein known for its emulsifying properties. Recently, a high hydrostatic pressure (HHP) treatment on the egg yolk granule, has induced the transfer of phosvitin to the soluble plasma fraction. This project aimed to evaluate the performance of ultrafiltration (UF) treatment for the generation of a fraction enriched in phosvitin, to produce an ingredient with improved emulsifying properties. An HHP treatment (400 MPa during 5 min) was applied to the granule (G1) (10 % w/w), in order to obtain a second granule (G2) and a plasma (P2) after centrifugation. The P2 fraction was ultrafiltered on a 10 kDa-polyethersulfone membrane to concentrate phosvitin. Phosvitin was identified and characterized in pressure-treated fraction P2 (1.73 ± 0.07% w/w) as well as in its corresponding UF retentate (26.00 ± 4.12% w/w) validating its total retention by the membrane. Similar permeation fluxes were obtained during UF, regardless of the conditions, demonstrating that the presence of phosvitin does not affect the performance of the process. Therefore, the combination of HHP and UF represents an interesting processing for the recovery and the concentration of phosvitin. The emulsifying properties of both retentates (control and pressure-treated) were evaluated. The emulsion prepared with the phosvitin-enriched retentate was more stable to flocculation and creaming. Confocal laser scanning microscopy showed a network of aggregated protein similar to a gel, which encapsulated oil droplets in emulsion made with UF retentate of pressure-treated plasma. SDS-PAGE profiles of the proteins recovered in the washed cream fraction showed the presence of several proteins, including β-phosvitin. Overall, the phosvitin enriched UF concentrate obtained from the plasma of pressurized egg yolk granule show better emulsifying properties than the plasma control suggesting a positive effect of β-phosvitin on the emulsifying properties.
Phosvitin (45 kDa) from egg yolk granule is a phosphoprotein known for its emulsifying properties. Recently, a high hydrostatic pressure (HHP) treatment on the egg yolk granule, has induced the transfer of phosvitin to the soluble plasma fraction. This project aimed to evaluate the performance of ultrafiltration (UF) treatment for the generation of a fraction enriched in phosvitin, to produce an ingredient with improved emulsifying properties. An HHP treatment (400 MPa during 5 min) was applied to the granule (G1) (10 % w/w), in order to obtain a second granule (G2) and a plasma (P2) after centrifugation. The P2 fraction was ultrafiltered on a 10 kDa-polyethersulfone membrane to concentrate phosvitin. Phosvitin was identified and characterized in pressure-treated fraction P2 (1.73 ± 0.07% w/w) as well as in its corresponding UF retentate (26.00 ± 4.12% w/w) validating its total retention by the membrane. Similar permeation fluxes were obtained during UF, regardless of the conditions, demonstrating that the presence of phosvitin does not affect the performance of the process. Therefore, the combination of HHP and UF represents an interesting processing for the recovery and the concentration of phosvitin. The emulsifying properties of both retentates (control and pressure-treated) were evaluated. The emulsion prepared with the phosvitin-enriched retentate was more stable to flocculation and creaming. Confocal laser scanning microscopy showed a network of aggregated protein similar to a gel, which encapsulated oil droplets in emulsion made with UF retentate of pressure-treated plasma. SDS-PAGE profiles of the proteins recovered in the washed cream fraction showed the presence of several proteins, including β-phosvitin. Overall, the phosvitin enriched UF concentrate obtained from the plasma of pressurized egg yolk granule show better emulsifying properties than the plasma control suggesting a positive effect of β-phosvitin on the emulsifying properties.
Kamel, Bernard. "Développement, caractérisation et optimisation d'un capteur de pression intégré sur une bougie d'allumage". Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20024/document.
Pełny tekst źródłaRecent environmentally-friendly norms and global demands for lower emissions and lower fuel consumption on gasoline engines require innovative combustion strategies, whereby air/fuel mixture should be meticulously controlled through a real time pressure feed-back sensor. In-cylinder pressure control has shown to be a key technology that enables an optimized coordination of an air/fuel mixture, and exhaust gas recirculation through closed loop control.Nowadays real time in-cylinder pressure measurement is not provided on passenger's cars. Thus far it has been implemented on specific engine for development of particular applications such as engine control. Several obstacles prevent the integration of pressure sensors on new engines such as high production cost of this device and its complex implementation on a standard engine. The Gasoline Combustion Sensor™ (GCS) is a non-intrusive in-cylinder pressure sensor integrated into a spark plug which has direct access to the combustion chamber. It answers the automotive integration constraints performance and reliability and allows in-cylinder pressure measurement up to 200bar, knock and misfiring detection.Such sensors allow for combustion follow-up in a real-time direct mode required for auto ignition combustion whereby fast feedback of combustion events enables fine tuning and individual cylinder spark/fuel management. It operates on the ignition as well as on the injection to optimize the combustion and reduce fuel consumption by an average of 1.4% under steady-state conditions, which will reduce harmful emissions by about 10%. The present thesis relates to the development of a low-cost pressure sensor which will be a basic requirement for future engine generations. It consists on two different sensing element types, one is based on piezoelectric ceramic, and the other comprises piezo-resistive strain gauge system directly embedded on the ceramic insulator. During this analysis, mechanical problems have been emphasized and a section was dedicated to resolve the problem of the pressure transmission to the sensing element reducing structure-borne noise on the sensor. Different mechanical concepts have been developed, where two categories have been selected.Chapter one describes the project in a global overview including sensor specifications and sensing principle, chapter two relates to the sensing element materialization including technology description. Proof body development based on piezoelectric sensor will be presented in detail in chapter three, while chapter four contains device characterization of both sensor types piezoelectric and piezo-resistive. Chapter five describes the signal processing and sensor packaging, and chapter six gives an optimization perspective of the device
Mboup, Mamadou Kane. "Influence des pressions de sélection et de la survie inter-épidémique sur la diversité génétique des populations de rouille jaune du blé : Puccinia striiformis f.sp. tritici". Paris 11, 2008. http://www.theses.fr/2008PA112019.
Pełny tekst źródłaTo study the impact of bottlenecks and oversummering on the wheat yellow rust populations, French and Chinese populations presenting respectively low and high interepidemic survival are studied and compared. The French populations present a strong genetic divergence between North and South. To explain this stable genetic structure, we have tested the hypothesis of adaptation to southern climatic conditions and to durum wheat which is common in this South. In opposition to northern pathotypes, the southern ones present an adaptation to high temperatures and to the durum wheat cultivar tested in our experimentations. This study highlights the existence of two distinct survival areas: one in the North-western Europe and another one in the Mediterranean zone. The other goal of this thesis was to assess the impact of population bottlenecks on the genetic diversity. We studied one population from the main oversummering area in China, which is subject to less important survival constraints than the European ones. The Chinese population shows a very high genetic diversity, never described so far for wheat yellow rust. This study also reveals a strong genetic recombination and revives the question concerning the existence of a sexual stage in P. Striiformis f. Sp. Tritici. The importance of population bottleneck is discussed considering other factors favoring population polymorphism such as host heterogeneity and diversity of cultural practices
Książki na temat "Jauge de pression"
Lorenz Andrés, José Luis. El Vilafamés foral. De la conquesta a l'arribada dels Borbons (1233-1707). Universitat Jaume I, 2021. http://dx.doi.org/10.6035/biblio.aulas.minor.2021.31.
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