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Artykuły w czasopismach na temat "Modélisation du gout"
MORAND-FEHR, P. M., R. BAUMONT i D. SAUVANT. "Avant-propos : Un dossier sur l’élevage caprin : pourquoi ?" INRAE Productions Animales 25, nr 3 (25.08.2012): 227–32. http://dx.doi.org/10.20870/productions-animales.2012.25.3.3210.
Pełny tekst źródłaRozprawy doktorskie na temat "Modélisation du gout"
Bognar, Katalin. "Modélisation du gout". Chambéry, 1997. http://www.theses.fr/1997CHAMS009.
Pełny tekst źródłaFroloff, Nicolas. "Modélisation moléculaire des sites récepteurs du gout". Palaiseau, Ecole polytechnique, 1994. http://www.theses.fr/1994EPXX0009.
Pełny tekst źródłaMatrosova, Kristina. "Modeling and influencing music preferences on streaming platforms". Electronic Thesis or Diss., Paris 13, 2024. http://www.theses.fr/2024PA131061.
Pełny tekst źródłaToday, music streaming services have become the primary means for people to access and enjoy recorded music. These platforms rely on algorithmic recommendation systems to help users navigate vast music catalogs and provide a personalized listening experience. For these recommendations to be accurate, patterns must be identified, and user preferences modeled accordingly. There are numerous ways to approach this modeling process, and each method impacts the recommendation outcomes differently. In turn, by consuming the recommended items, users' preferences and listening behaviors may be influenced in various ways. For instance, recommendations may lead to a diversification of their music choices, exposing them to new content, or, conversely, confine them to a niche. These influences may also manifest in more subtle ways, making them harder to measure. This thesis explores the feedback loop between musical taste and recommendation systems through two main questions: how can we computationally model individual musical preferences using behavioral data from streaming platforms? how can we measure the influence that recommender systems have on shaping those preferences? We begin by providing an overview of the data that can be collected from streaming platforms, exploring the types of information available about users, music items, and their interactions. We also examine the structure and distribution of these data, which form the foundation for subsequent analysis.Next, we review the literature on musical taste, a topic that has been widely studied across various fields such as sociology, psychology, and cultural geography, long before the advent of music recommender systems. By reviewing these diverse approaches to measuring musical preferences, we identify insights that can inform and improve recommendation algorithms.We then address the challenges of representing the musical space. With millions of tracks available on streaming platforms, it is crucial to categorize, label, and identify common patterns among music items in order to accurately model user preferences and generate relevant recommendations. Finally, we present an overview of music recommendation systems, focusing on the current methods, specific challenges in the music domain, and the role of fairness and bias in influencing user preferences and listening habits. With this multidisciplinary and multi-modal background in place, we address our research questions. First, we explore how to model musical taste using streaming data, constructing a fingerprint' of user preferences based on two different definitions of musical taste: one that highlights individual uniqueness and another that reflects collective preferences. Then, we tackle the challenges in measuring the influence of music recommender systems, using local music consumption as a case study. Ultimately, this thesis aims to bridge the gap between understanding musical taste and developing recommendation systems that are not only personalized but also capable of fostering diverse and satisfying listening experiences
Crouzil, Thomas. "Modélisation de structure dynamique dans un champ optique". Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0043/document.
Pełny tekst źródłaOptical trapping appears now, since a few decades, as a major theme at the intersection of variousdisciplines. Since the results of Ashkin, many works were made in the trapping and the guidance of physical objects (particles, molecules, bacteria, etc.) of any sizes. The latter will characterize then, in front of the wavelength, the optical domain in which we shall take place (Rayleigh, Mie, Geometrical Optics).Our work thus concerns the study of the properties of periodic linear chains of droplets (oil), placed in water, and submitted to two counter-propagating horizontal laser beams of gaussian profile. We show that it is possible to establish a spatial order of a set of large drops (in front of the wavelength) in a periodic structure. The originality of such a system lies in the fact that the light can then be refocused by the set of periodically spaced drops. This periodicity may thus, in some cases, confer on the beam a periodic refocusing within the network. This first study, in static limit, allows us to identify the conditions of coupling modes associated with drop channels. In particular, we characterize the presence of Bloch modes where the beam propagates with similar frequency to that of the network. This leads us to note that these modal conditions are submitt to the gaussian phase parameter "Thêta" (Gouy phase). Thus, although structured at a widely higher scale, we highlight theoretically similar properties to that of the photonic crystals, conferred by the periodicity of the chains of drops. This allows us, consequently, to demonstrate the existence of bandgaps, leading us to define a set of guiding/not-guiding modes of this chain. This static study, thereafter, is extended from a dynamic point of view by taking into account the effect of the optical forces on the drops. We show that it is possible to optically trap such drops on stable equilibrium states. Beyond of which we highlight, through a parametric study, the existence of periodic or pseudo-periodic oscillating modes.Finally, we take into account the phenomena of collisions by coalescence, involving a reorganization of the distributions of optical fields which can result in new configurations of trapping
Terrien, Christophe. "Modélisation de la demande d'un bien de goût : application aux vins et spiritueux". Reims, 2009. http://www.theses.fr/2009REIME010.
Pełny tekst źródłaThe conventional microeconomic formulation is insufficient to account for the application of heterogeneous goods such as taste goods because it is very restrictive in its assumptions about the product and the consumer. We propose in this thesis a complementary approach through the perspective of taste. A multidisciplinary research gives two dimensions to taste: an idiosyncratic dimension and a social dimension. Taste requires a temporal approach. Two dynamic models applied to the wine and spirit market, considered as taste goods, formalize and test the assumptions made through a numerical simulation. The results show that tastes are likely to explain the existence, the functioning, and the relative stability of taste goods markets
Mercanti-Guérin, Maria. "La créativité publicitaire perçue : modélisation et impact sur le processus de persuasion publicitaire". Caen, 2005. http://www.theses.fr/2005CAEN0627.
Pełny tekst źródłaKnani, Salah. "Contribution à l'étude de la gustation des molécules sucrées à travers un processus d'adsorption. Modélisation par la physique statistique". Reims, 2007. http://theses.univ-reims.fr/exl-doc/GED00000736.pdf.
Pełny tekst źródłaAdsorption of sweet molecules on gustatory receptor sites is a determining step in the mechanism of taste chemoreception. Obviously adsorption is a peripheral event. A SMURF device (Sensory Measuring Unit for Recording Flux) is used to obtain experimental psychophysical curves relative to four sweeteners: sucrose, fructose, glucose and maltitol. Through the grand canonical ensemble a treatment of statistical physics is used to develop analytic expressions of the gustatory response in terms of adsorption. The modeling allowed selecting of the double layer model which is used to interpret the adsorption phenomenon. The variation of the number of adsorbed molecules per site permitted proposing of two types of anchorage of a sweet molecule to the adsorbent surface: the first consists in a parallel anchorage and the second is a perpendicular anchorage. We found out a relationship between sweetness potency of molecules and the physical parameters of the model. Hence, a correlation was found between sweetness potency on the one hand and the maximum response, the solubility, and the occupation rate at threshold concentration on the other. In parallel we carried out using a Quartz Crystal Microbalance (QCM) adsorption isotherms of sucrose on three thin layers of porphyrin, calixarene and gold. The modeling of the isotherms by the modified BET model allowed characterization of the adsorption using physicochemical parameters of the model. We showed that the number of molecules per site and the adsorption energies are similar to those of taste. So the sucrose presents the same behavior on these supports as in taste chemoreception
Djeghlaf, Lyas. "Conception, modélisation et réalisation de microcapteurs pour l'analyse de la sphère buccale : application à la détection du glutamate". Phd thesis, Toulouse 3, 2013. http://thesesups.ups-tlse.fr/1962/.
Pełny tekst źródłaGlutamic acid and especially its associated glutamate ion are additives widely used as food flavor enhancers as well as main markers of the japanese taste "umami". However, excess consumption may be responsible for brain disorders causing sweats, headaches, losses of balance, faints and pains. Thus, it became important to develop methods in order to analyze glutamate ions in liquid phase and to integrate them in order to realize glutamate-sensitive microsensors. Works are therefore dedicated to the glutamate-sensitive enzymatic field effect transistors (EnFET) development, dealing with the pH-ChemFET mass fabrication using "Silicon & Polymers" technologies, their packaging for the measurement in liquid phase, the glutamate-EnFET modeling, the integration of glutamate oxidase enzymatic layer, and the characterization of the pH-ChemFET and glutamate-EnFET microsensors. They intend to achieve the integration of glutamate-EnFET into an electronic masticator developed by the laboratory FLAVIC-INRA in Dijon. In parallel a new concept microsensor named ElecFET was designed. This new concept combines amperometric and potentiometric detection techniques to the microscale. The different technological steps have been completed and ElecFETs chips were manufactured in the LAAS-CNRS technological platform. We validated this new concept first by studying the water electrolysis. Then, the parameters that influence the microsensor response were discussed. Finally, we applied this new concept to the detection of hydrogen peroxide, glucose and glutamate
Djeghlaf, Lyas. "Conception, modélisation et réalisation de microcapteurs pour l'analyse de la sphère buccale : application à la détection du glutamate". Phd thesis, Université Paul Sabatier - Toulouse III, 2013. http://tel.archives-ouvertes.fr/tel-00822773.
Pełny tekst źródłaShumbusho, Félicien. "Designing, technical evaluation and profitability estimation of breeding strategies based on molecular information for small ruminant species". Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0005/document.
Pełny tekst źródłaImplementing genomic selection (GS) in small ruminant breeding programs is still at the research and development level. This new way of selection in animals and plants was made possible thanks to the development of low costs, high density SNP chips. It proved to be highly beneficial in dairy cattle breeding programs. The French small ruminant industries are strongly interested in evaluating the efficiency of this tool in their situation. However, they are also very cautious given the inherent differences in terms of capacity and functionalities between dairy cattle and small ruminant breeding programs. This study is part of bigger efforts mobilized to evaluate the use and management of genomic information in sheep and goats breeding programs. The PhD work examined (1) the impact of genomic selection on genetic gain of small ruminant breeding programs; (2) the economic efficiency of genomic selection in small ruminant, through an example of a meat sheep breeding program; (3) the benefits of optimizing the use of decision variables on genetic gain; and (4) contributed some ideas on how to optimize the choice of individuals in the reference population. The modeling parts were done by deterministic methods and the examples focused on the existing breeding programs (dairy sheep, meat sheep and dairy goats) with medium to small size breeding units. The results of this study suggest that adopting genomic selection can be more profitable than classic selection in terms of genetic gain, provided that, at least, a medium size reference population is available (around 2,000 individuals). They show, especially in dairy breeds, that the GS potentials of reducing generation interval could greatly increase the genetic gain. In meat sheep breeding program, exploring the possibility of combining genomic information and meat phenotypes gave higher genetic gain than classic or pure genomic selection. In terms of economic impacts, results of the meat sheep breeding program we modeled show that all genomic selection strategies are more expensive than classic selection. However, the contribution margins (total revenues minus total variable costs) of some GS variants were slightly higher than benefits from classic selection. The study also shows, across breeds and selection strategies, that optimizing the use of decision variables could greatly increase the genetic gain and benefits, compared to the current situation. With this thesis we can conclude that adopting genomic selection in small ruminant breeding programs is possible and could be more beneficial than classic selection in some cases. However, there are more obstacles compared to dairy cattle, especially, construction of reliable reference populations and high costs of genotypes relative to the value of selection candidates. These might delay implementation in general or prevent it in some breeds