Letteratura scientifica selezionata sul tema "Indicateurs prédictifs"
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Articoli di riviste sul tema "Indicateurs prédictifs":
Labbé, A. "Indicateurs prédictifs dans l’asthme de l’enfant". Revue Française d'Allergologie et d'Immunologie Clinique 48, n. 8 (dicembre 2008): 539–42. http://dx.doi.org/10.1016/j.allerg.2008.07.002.
Youssef, R. M., e H. Y. Atfa. "Child abuse and neglect: its perception by those who work with children". Eastern Mediterranean Health Journal 4, n. 2 (15 marzo 1998): 276–92. http://dx.doi.org/10.26719/1998.4.2.276.
Abdallah, Taisir. "Prevalence and predictors of burnout among Palestinian social workers". International Social Work 52, n. 2 (marzo 2009): 223–33. http://dx.doi.org/10.1177/0020872808099732.
Nygren, Marianne. "Differences in Comprehensive System Rorschach Variables Between Groups Differing in Therapy Suitability". Rorschachiana 26, n. 1 (gennaio 2004): 110–46. http://dx.doi.org/10.1027/1192-5604.26.1.110.
Manus, Jean-Marie. "NT-proBNP, indicateur prédictif chez le patient âgé". Revue Francophone des Laboratoires 2010, n. 422 (maggio 2010): 12. http://dx.doi.org/10.1016/s1773-035x(10)70481-0.
Blot, Christophe, e Albin Salmon. "Une analyse de l’inflation de la zone euro à travers ses composantes cycliques et acycliques". Revue de l'OFCE N° 182, n. 3 (6 marzo 2024): 189–210. http://dx.doi.org/10.3917/reof.182.0189.
Beckett, Matthew. "The borders that remain: prevention of cervical cancer in refugee and immigrant women in Canada". University of Ottawa Journal of Medicine 6, n. 2 (30 novembre 2016): 61–66. http://dx.doi.org/10.18192/uojm.v6i2.1811.
Mojon, Benoît, Virginie Coudert e Fernando Barran. "Taux d'intérêt, spreads, comportement bancaire : les effets sur l'activité réelle." Revue économique 46, n. 3 (1 maggio 1995): 625–34. http://dx.doi.org/10.3917/reco.p1995.46n3.0625.
Levieuge, Grégory. "Cohérence et contenu prédictif des indicateurs du Bank Lending Survey pour la France". Revue française d'économie XXIX, n. 2 (2014): 245. http://dx.doi.org/10.3917/rfe.142.0245.
Menahem, Benjamin, Jean Lubrano, Andréa Mulliri, Rémy Morello, Céline Bazille, Laurence Chiche, Ephrem Salame e Arnaud Alves. "Surface corporelle : un nouvel indicateur prédictif de fistule pancréatique après duodénopancréatectomie céphalique". Journal de Chirurgie Viscérale 151, n. 4 (ottobre 2014): A27. http://dx.doi.org/10.1016/s1878-786x(14)70164-0.
Tesi sul tema "Indicateurs prédictifs":
Mourot, Benoît-Pierre. "Comment déterminer par une approche innovante et rapide des indicateurs prédictifs de la valeur nutritionnelle de la viande bovine ?" Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22556.
In a context where the consumption of beef is declining in part because of its lipid composition, an opportunity to revive the beef industry is to communicate with consumers on nutritional quality of beef, especially its fatty acids (FA) composition. To ensure this communication is “efficient” at all levels of the industry, we must have reliable analytical resources but also easy to implement and also inexpensive. The analytical method proposed for determining the beef FA composition is the near-infrared spectroscopy (NIRS) which is inexpensive, minimally invasive and could thus be widely used in routine in slaughterhouse. We showed that NIRS was effective to determine the concentrations of saturated (SFA) and monounsaturated (MUFA) FA (R2> 0.9). Under the best conditions for the prediction of PUFA (samples containing high levels of PUFA and / or with a high variability), PUFA predictions were still not enough (R2 <0.75). So, to overcome this weakness of NIRS, indirect prediction equations of PUFA were performed from the SFA and MUFA contents correctly determined by NIRS and information available in slaughterhouses. These equations, developed by multiple linear regression, were used to correctly predict total and n-6 PUFA (R2> 0.8). These equations are still to be improved for the determination of the total n-3 PUFA (R2 = 0.64) and of the 18:3 n-3, the 20:5 n-3 and the 22:6 n-3 (R2 <0.55). Given that the ultimate aim of this research is to use the equations as a complementary tool in tandem with NIRS measurements to serve industry as a way to rapidly determine the FA content of beef, further studies will be needed to trial and test our novel coupled NIRS–prediction equations approach
Leplat, Johann. "Développement saprotrophe de fusarium graminearum : rôle respectif de différents habitats naturels du champignon dans le processus d'infection du blé en Bourgogne ; recherche d'indicateurs prédictifs du risque de fusariose". Phd thesis, Université de Bourgogne, 2012. http://tel.archives-ouvertes.fr/tel-00843896.
Soulé, Emma. "Évaluer la durabilité des exploitations agricoles d'un territoire à l'aide d'une méthode multicritère : intégration des impacts environnementaux et des services écosystémiques". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0159.
The agriculture was profoundly transformed in France after the Second World War in order to recover food sovereignty. The intensification of agriculture through the use of synthetic products and machinery has had repercussions on ecosystems, human health and the economy. In order to better identify ways to limit the negative impacts of agriculture, methods using indicators have been developed to assess the sustainability of farms. In parallel, a lot of work on ecosystem services has emerged to find out how agriculture can rely on the biological processes of agricultural ecosystems to achieve its ecological transition. This thesis aims to provide knowledge on the joint assessment of environmental impacts and ecosystem services by developing a new method for assessing the sustainability of agricultural systems.Firstly, a state of the art of the literature was carried out on 262 methods of environmental sustainability assessment in agriculture and the themes covered by these methods. This synthesis revealed that very few methods organise their indicators in a conceptual framework. Furthermore, so-called predictive indicators are little used and ecosystem service indicators are rarely integrated into these methods.A conceptual framework was then developed for the new sustainability assessment method of agricultural systems, based on the conceptual framework of the MASC 2.0 method and on the EFESE study for the integration of the concept of farmer's benefit and ecosystem services. This conceptual framework is composed of 22 themes including 7 benefits, 15 environmental impacts, and each theme is characterised by direct or indirect factors. An analytical framework for the joint assessment of environmental impacts and ecosystem services was also proposed. Finally, to implement the conceptual framework, several innovative indicators of environmental impacts and ecosystem services were designed.Lastly, this new method was applied to a case study of 33 arable farms in the Champagne crayeuse (France). The joint assessment of environmental impacts and ecosystem services made it possible to go further in the characterisation of farms than the simple opposition between conventional and organic farming. Indeed, one farm has interesting potential ES levels and low environmental impacts, while being economically efficient. In order to fully assess the sustainability of farms, the work undertaken during this thesis needs to be extended by further developing the economic and social aspects and by integrating dynamic aspects. Similarly, the results need to be confirmed in other pedoclimatic contexts
Fremolle-Kruck, Jeanne. "Les indicateurs précoces de l'engagement social : étude de leur valeur prédictive dans le cadre d'une approche développementale de l'autisme". Toulouse 2, 2002. http://www.theses.fr/2002TOU20034.
This study was conducted on the early indicators of social engament in ADOS (Autism Diagnostic Obseravtion Schedule). ADOS factorial anlysis shows a two factor structure: one on behavioral deviance and one on abnormal behavior frenquency. A crossmodal study was conducted on 52 autistic children aged between 3 and 6 years-old. A developmental profile characterised by increase of behavioral deviance between 4 to 5 years old was observed. A longitudinal study of 7 childre followed for two years confiremed this increase. A multiple regression analysis attempted to show the predictive value of certain indicators and their relationship to performance and verbal IQ, both of which have known impact on the development in children with autism. Factors including elements of imagination and creativity appear to be very good predictive factors of future development
Ben, Soussia Amal. "Analyse prédictive des données d’apprentissage, en situation d’enseignement à distance". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0216.
Over the past few decades, the adoption of e-learning has evolved rapidly and its use has been pushedeven further with the COVID-19 pandemic. The objective of this learning mode is to guarantee thecontinuity of the learning process. However, the online learning is facing several challenges, and themost widespread is the high failure rates among learners. This issue is due to many reasons such asthe heterogeneity of the learners and the diversity of their learning behaviors, their total autonomy, thelack and/or the inefficiency of the pedagogical provided follow-up. . .. Therefore, teachers need a systembased on analytical and intelligent methods allowing them an accurate and early prediction of at-risk offailure learners. This solution is commonly adopted in the state of the art. However, the work carried outdoes not respond to some particularities of the learning process (the continuity and evolution of learning,the diversity of learners and their total autonomy) and to some teachers expectations such as the alertgeneration.This thesis belongs to the field of learning analytics and uses the numeric traces of online learnersto design a predictive system (Early Warning Systems (EWS)) dedicated to teachers in online establish-ments. The objective of this EWS is to identify learners at risk as soon as possible in order to alertteachers about them. In order to achieve this objective, we have dealt with several sub-problems whichhave allowed us to elaborate four scientific contributions.We start by proposing an in-depth methodology based on the Machine Learning (ML) steps and thatallows the identification of four learning indicators among : performance, engagement, reactivity andregularity. This methodology also highlights the importance of temporal data for improving predictionperformance. In addition, this methodology allowed to define the model with the best ability to identifyat-risk learners.The 2nd contribution consists in proposing a temporal evaluation of the EWS using temporal metricswhich measure the precocity of the predictions and the stability of the system. From these two metrics,we study the trade-offs that exist between ML precision metrics and temporal metrics.Online learners are characterized by the diversity of their learning behaviors. Thus, an EWS shouldrespond to this diversity by ensuring an equitable functioning with the different learners profiles. Wepropose an evaluation methodology based on the identification of learner profiles and that uses a widespectrum of temporal and precision metrics.By using an EWS, teachers expect an alert generation. For this reason, we design an algorithm which,based on the results of the prediction, the temporal metrics and the notion of alert rules, proposes anautomatic method for alert generation. This algorithm targets mainly at-risk learners.The context of this thesis is the French National Center for Distance Education (CNED). In parti-cular, we use the numeric traces of k-12 learners enrolled during the 2017-2018 and 2018-2019 schoolyears
Ricou, Charles. "Conception d’un indicateur prédictif évaluant les effets des pratiques agricoles sur la diversité floristique et ses services en grandes cultures à l’échelle de la bordure de champ". Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0107/document.
Developing cropping systems supporting biodiversity is an important goal for agronomists in the current context of society. To achieve this goal, they need predictive methods assessing the effect of cropping practices on biodiversity to characterize and evaluate cropping systems. Among ecologists, a growing agreement exists to address biodiversity not only as species richness but also as ecosystemic services. There are numerous proposals of biodiversity indicators but those are based on diversity measurement within taxonomic groups or on management variables, and are not predictive. The objective of the thesis is to design a predictive indicator to assess the effects of cropping practices on biodiversity and its services. To achieve this, we decided to address plant diversity and its associated services, conservation value, a stake for society, and pollination, important stake for agriculture. We structured the thesis in three steps. First we selected cropping practices having combined effects on biodiversity and its services, identified their nature and assess the range of their effects at the field margin scale. In a second step, we integrated by expertise, this knowledge in an operational model. Following the design, we evaluate the sensitivity and the predictive quality of the model by comparing model outputs with field measurements carried out during the thesis or outside. Last we transformed outputs of the model (in form of presence probability for 338 species) into an indicator by aggregating them into synthetic value. Then, this was calibrated to selected references values on a scale between 0 (unfavorable) and 10 (favorable) easy to understand. The development of this operational predictive indicator will enable agronomists to assess positive and negative effects of cropping practices and to identify innovative practices supporting biodiversity and its services. The indicator can be used with other environmental, economic, and social indicators to assess sustainability of arable farming systems
Turck, Christine. "Prédiction de couverture de champ radioélectrique pour les réseaux radiomobiles : L'apport des Systèmes d'Information Géographique. Application en milieu urbain". Phd thesis, Université Louis Pasteur - Strasbourg I, 2005. http://tel.archives-ouvertes.fr/tel-00012014.
Les possibilités d'Analyse Spatiale et d'intégration de données pertinentes au sein d'un Système d'Information Géographique, ont permis d'appréhender l'influence des données géographiques (qualité, typologie, échelle, morphologie, etc.) sur la qualité (justesse de la prédiction radio, temps de calcul) de la modélisation de la propagation des ondes radio. Nous avons également introduit de nouvelles variables géographiques indirectes (indicateurs morphologiques, surfaces de visibilité, etc.) dans la modélisation, afin de caractériser plus efficacement le milieu géographique en présence. L'ensemble de ces résultats a été implémenté dans des algorithmes basés sur une approche géographique. Ils ont permis d'optimiser les calculs de couverture de champ dans les modèles radio. Les résultats obtenus ont servi à la réalisation d'un prototype informatique : le modèle OpenMorph.
Le modèle OpenMorph a été mis en œuvre en articulation avec un Système d'Information Géographique. Il se compose de deux parties : un module d'Analyse Spatiale qui permet de calculer les données géographiques et un module de calcul radio qui implémente deux modèles de propagation (Okumura-Hata et COST-LD). Afin de valider le modèle OpenMorph, une simulation a été effectuée sur la Communauté Urbaine de Strasbourg.
Jeantet, Alexis. "Durabilité du drainage agricole français sous contrainte de changement climatique". Electronic Thesis or Diss., Sorbonne université, 2022. https://theses.hal.science/tel-03935433.
Artificially drained soils are soils showing temporary or permanent waterlogging issues generating a fast soil saturation during the wet season. This phenomenon limits natural soil drainage, i.e. the soil's ability to dry out, and often leads to flood events harmful to current crops. Agricultural drainage is a solution partially addressing the problem. This hydraulic technic stabilizes hydric conditions into the soil depth managing the soil water content and increasing its aeration to ensure better crop yields. In France, all artificially drained soils comprise more than 2.7 million ha of arable soils, i.e. close to 10% of all arable land. Consequently, the need for evaluating the evolution French drained soils is crucial, especially in an unstable future context affected by climate change where water resource management will become (has already become) a major environmental and societal issue. To our knowledge, such a study has not yet been carried out. The main purpose of the thesis was to assess as precisely as possible the future French drainage hydrology by 2100 on 22 drained plots reflecting the main pedoclimatic characteristics of the main drained areas of mainland France. A hydro-climatic modelling chain based on a multi-model ensemble approach was used to simulate a set of future hydrological projections from greenhouse gas emission scenarios to a group of 17 hydrological indicators describing the main characteristics of the drainage hydrology. The future climatic conditions were provided by 30 climate projections spread over: (1) three future climate scenarios based on Radiative Concentration Pathways (RCPs); (2) six General Circulation Models (GCMs); (3) nine Regional Climate Models (RCMs). First, the study focused on the analysis of the hydrological drainage model SIDRA-RU (“SImulation du DRAinage – Réserve Utile” in French), model developed to adapt to French pedoclimatic conditions. The SIDRA-RU model showed very good numerical and graphical performances of the La Jaillière site, which was deemed representative of the majority of French drained soils. Then, an analysis of the temporal robustness of the SIDRA-RU model on the 22 drained plots showed the model was temporally robust despite weaker performances on clayey soils. Consequently, the SIDRA-RU was deemed reliable to simulate future hydrological projections over mainland France. Second, we assessed the impact of using climate projections in the SIDRA-RU model on the simulation of the 17 hydrological indicators on the La Jaillière site. Results showed that using climate projections to force the SIDRA-RU model does not significantly bias the hydrological indicators. The uncertainty propagation analysis resulting from the hydro-climatic modelling chain revealed that the climate components, i.e. the GCMs and the RCMs, are the two main sources of uncertainty. Third, the 17 hydrological indicators were simulated on the 22 drained plots from the database to spatially assess the main effects of climate change on French drainage hydrology. Results showed that the expected changes become more important as time goes to 2100 and the future climate scenario is severe. Among the principal changes, there are: (1) intensification of the dry period exposing current crops to an increasing irrigation need; (2) intensification of flood events raising the question of the sustainability of the design of current drainage networks to protect current crops during the wet season. This regime change is common to all the 22 drained plots regardless of soil type or location. Agricultural water quality and agricultural practices in drained areas are also impacted, potentially prompting farmers and decision-makers to adapt their practices to farm productivity and protect the environment. Further analysis is required to detail these latter elements
Bergez-Lacoste, Manon. "Conception de biosolvants à partir de la molécule plateforme furfural, en laboratoires virtuel et réel". Phd thesis, Toulouse, INPT, 2013. http://oatao.univ-toulouse.fr/12278/1/bergez_lacoste.pdf.
Delcor, Laurianne. "Contribution à la modélisation du confort vibratoire et acoustique sous excitations multi-harmoniques en cabine d’hélicoptères". Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI042.
Helicopters are complex machines generating a significant amount of noise and vibration. It is therefore important for Airbus to be able to specify the discomfort to offer comfortable helicopters to their customers. The literature proposes a standard to quantify vibration comfort from acceleration measurements (ISO2631-1). Concerning noise, internal Airbus studies have been carried out and have shown that noise discomfort can be modelled as a function of loudness, acuity, tone and level in dB(G). Finally, there is no overall discomfort model linking the discomfort of simultaneous sound and vibration stimuli for application to the helicopter. This thesis aims to model global discomfort based on these tools. Several perceptual experiments aimed at evaluating the discomfort of vibratory stimuli in volunteers have been performed. They have shown that the ISO2631-1 standard provides a good estimate of vibratory discomfort. A modification of this standard taking into account the amplitude modulation of accelerations makes it possible to improve the predictive quality in the case of beating phenomena. Similar experiments have been performed in acoustics, where participants evaluated sound stimuli without and with hearing protection. In the first case, the discomfort model developed by Airbus remains valid. A simpler model based on loudness alone allows a better estimation of the sound discomfort. With hearing protectors, the estimation of discomfort is not as direct, the sound signals must first be filtered out by the attenuation of the protectors. This thesis has shown that for helicopter sounds, the attenuation values provided by the manufacturers are too optimistic. Objective attenuation measurements give lower values, in accordance with INRS recommendations. The sound signals are therefore filtered by the attenuations of the protectors provided by the manufacturers penalized according to the INRS. A model based on loudness alone makes it possible to estimate the sound discomfort under hearing protection. However, the coefficients of this model are different from the model obtained for listening without protection. Finally, volunteers estimated the global discomfort for noise and vibrations of helicopters played simultaneously. The results showed that a global discomfort model can be obtained from the noise discomfort indicators and the vibration discomfort indicators. This model is based on a linear regression to which a coupling term was added, in the form of the absolute value of the difference between the noise indicator and the vibration indicator. A simplified model makes it possible to dispense with vibration measurements at the seat and backrest and to estimate discomfort from noise measurements and foot accelerations for a given seat
Atti di convegni sul tema "Indicateurs prédictifs":
Sicard, L., e R. Khonsari. "Conséquences dentaires de la dysjonction pterygo-maxillaire pendant les chirugies d’avancée fronto-faciale monobloc dans le traitement des syndromes de Crouzon". In 66ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206602001.