Relevant bibliographies by topics / Bimodalità

Academic literature on the topic 'Bimodalità'

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Published: 14 March 2023

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Journal articles on the topic "Bimodalità"

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Lemennicier, Bertrand, Hororine Lescieux-Katir, and Bernard Grofman. "The 2007 French Presidential Election." Canadian Journal of Political Science 43, no. 1 (March 2010): 137–61. http://dx.doi.org/10.1017/s0008423909990746.

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Abstract. We make use of a novel forecasting technique based on the Hotelling-Downs spatial framework to project vote outcomes in the second round of the two-round French presidential election system. In doing so we take advantage of the high degree of bimodality in the distribution of voter preferences to predict which candidates will make it into the second round. While our principal focus is on the 2007 election, we also look at the seven previous presidential elections in the French Fifth Republic, from 1965 through 2002.Résumé. Pour prédire le résultat du deuxième tour de scrutin des élections présidentielles françaises de 2007, nous avons fait appel à une nouvelle technique fondée sur le modèle spatial de Hotelling-Downs. En procédant ainsi, nous avons pris en compte le haut degré de bimodalité de la distribution des préférences pour pronostiquer lequel des deux candidats remporterait la victoire. Bien que nous ayons surtout centré notre attention sur l'élection présidentielle de 2007, nous avons aussi examiné les sept élections présidentielles antérieures de la Cinquième République, tenues de 1965 à 2002, afin de tester notre méthode et prédire ex ante les résultats de 2007.
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Knapp, Thomas R. "Bimodality Revisited." Journal of Modern Applied Statistical Methods 6, no. 1 (May 1, 2007): 8–20. http://dx.doi.org/10.22237/jmasm/1177992120.

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Bertossa, Cameron, Peter Hitchcock, Arthur DeGaetano, and Riwal Plougonven. "Bimodality in ensemble forecasts of 2 m temperature: identification." Weather and Climate Dynamics 2, no. 4 (December 15, 2021): 1209–24. http://dx.doi.org/10.5194/wcd-2-1209-2021.

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Abstract. Bimodality and other types of non-Gaussianity arise in ensemble forecasts of the atmosphere as a result of nonlinear spread across ensemble members. In this paper, bimodality in 50-member ECMWF ENS-extended ensemble forecasts is identified and characterized. Forecasts of 2 m temperature are found to exhibit widespread bimodality well over a derived false-positive rate. In some regions bimodality occurs in excess of 30 % of forecasts, with the largest rates occurring during lead times of 2 to 3 weeks. Bimodality occurs more frequently in the winter hemisphere with indications of baroclinicity being a factor to its development. Additionally, bimodality is more common over the ocean, especially the polar oceans, which may indicate development caused by boundary conditions (such as sea ice). Near the equatorial region, bimodality remains common during either season and follows similar patterns to the Intertropical Convergence Zone (ITCZ), suggesting convection as a possible source for its development. Over some continental regions the modes of the forecasts are separated by up to 15 ∘C. The probability density for the modes can be up to 4 times greater than at the minimum between the modes, which lies near the ensemble mean. The widespread presence of such bimodality has potentially important implications for decision makers acting on these forecasts. Bimodality also has implications for assessing forecast skill and for statistical postprocessing: several commonly used skill-scoring methods and ensemble dressing methods are found to perform poorly in the presence of bimodality, suggesting the need for improvements in how non-Gaussian ensemble forecasts are evaluated.
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Cantor, Alan B. "Evidence of bimodality." Journal of Chronic Diseases 39, no. 5 (January 1986): 410. http://dx.doi.org/10.1016/0021-9681(86)90129-3.

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Grayson, D. A. "Can Categorical and Dimensional Views of Psychiatric Illness be Distinguished?" British Journal of Psychiatry 151, no. 3 (September 1987): 355–61. http://dx.doi.org/10.1192/bjp.151.3.355.

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Bimodality in a distribution of symptoms is often claimed to be convincing evidence that a disorder is categorical, a discrete disease entity, rather than the extreme on a continuous dimension. However, using concepts from contemporary psychometric theory it is shown that bimodality can arise from the dimensional viewpoint. In fact, contrary to the usual belief, bimodality would be expected to occur in many research contexts if the dimensional alternative were correct.
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Chakrabarti, D. J., Claire L. Davis, and Martin Strangwood. "Characterisation of Bimodal Grain Structures and Their Dependence on Inhomogeneous Precipitate Distribution during Casting." Materials Science Forum 500-501 (November 2005): 613–22. http://dx.doi.org/10.4028/www.scientific.net/msf.500-501.613.

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Bimodal grain size distributions were found in continuously cast slab and thermomechanical controlled rolled (TMCR) samples of Nb-microalloyed steel. Scanning electron microscopy (SEM) revealed inhomogeneous distributions of Al- and Nb-containing precipitates, which were found to pin prior austenite grain boundaries during reheating. An effort has been made to establish parameters to quantify the extent of bimodality of reheated and rolled microstructures. Quantification of bimodality using peak grain size range, (PGSR) and peak height ratio, (PHR), is found to match closely with the visual observation of bimodality. Thermo-Calc software was used to predict the sequence of precipitation for different compositions and that could explain the formation of bimodality during reheating.
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Natori, Akina, Hao-Wen Sim, Bryan Anthony Chan, Peiran Sun, Stephanie Moignard, Daniel Yokom, Charles Henry Lim, et al. "Comparison of bimodality versus trimodality therapy for esophageal or gastroesophageal junction (GEJ) cancer: Experience from the Princess Margaret Cancer Centre." Journal of Clinical Oncology 36, no. 4_suppl (February 1, 2018): 122. http://dx.doi.org/10.1200/jco.2018.36.4_suppl.122.

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122 Background: There are no phase 3 trials comparing definitive chemoradiation (bimodality) versus. perioperative chemoradiation (trimodality) for locoregional esophageal/GEJ cancer. Methods: A retrospective analysis (2011-2015) compared bimodality and trimodality therapy in patients (pts) with locoregional esophageal/GEJ cancer treated with curative intent. Overall survival (OS) and disease-free survival (DFS) were calculated from the date of diagnosis. Uni- and multivariable Cox proportional hazards regression adjusted for patient and disease factors. Results: Of 108 patients, 82 (76%) were male. Mean ages were 69.5 ± 11.0 years (bimodality; N = 41) and 60.5 ± 11.1 years (trimodality; N = 67). For bimodality pts, 37% had adenocarcinoma and 63% had squamous cell carcinoma (SCC). For trimodality pts, 79% had adenocarcinoma and 21% had SCC (p < 0.0001). Bimodality pts received a higher radiation dose compared to trimodality pts (50.1 ± 6.7 vs. 45.2 ± 6.4 Gy). Median follow-up was 49.3 months. We found no significant OS difference between bimodality (27.0 months) and trimodality therapy (29.8 months) in the overall cohort (p = 0.57) (4 year OS rate: 42% vs. 38%). In the subgroup with adenocarcinoma histology, trimodality therapy significantly improved OS and DFS compared to bimodality (OS: 31.8 vs. 10.4 months, hazard ratio (HR) 0.34, 95% confidence interval (CI) 0.18-0.66, p = 0.001; DFS: 15.0 vs. 6.7 months; HR 0.39, 95%CI 0.21-0.73, p = 0.003). In the SCC subgroup, median OS and DFS were similar (OS: not reached vs. 29.2 months, p = 0.48; DFS: 27.0 vs. 24.0, p = 0.96). Using multivariable regression with AIC backward selection, the only retained prognostic factors were treatment modality (p = 0.06) and histology (p = 0.01). Conclusions: Our findings support preferential use of trimodality therapy for pts with adenocarcinoma histology given superior OS and DFS, whereas bimodality and trimodality therapy appeared comparable in pts with SCC histology. Pending confirmation in a larger series with longer follow-up, these findings suggest differential treatment algorithms for locoregional esophageal and GEJ cancer based on tumor histology.
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Malov, I. F. "Bimodality of anomalous pulsars?" Astronomy Letters 34, no. 10 (September 29, 2008): 699–703. http://dx.doi.org/10.1134/s1063773708100058.

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Rodrigues, Regina R., Aneesh Subramanian, Laure Zanna, and Judith Berner. "ENSO Bimodality and Extremes." Geophysical Research Letters 46, no. 9 (May 3, 2019): 4883–93. http://dx.doi.org/10.1029/2019gl082270.

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Pizzi, Claudio. "Relative Contingency and Bimodality." Logica Universalis 7, no. 1 (January 18, 2013): 113–23. http://dx.doi.org/10.1007/s11787-012-0071-8.

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Dissertations / Theses on the topic "Bimodalità"

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Assaker, Carine. "Synthèse et caractérisation de titanates mésoporeux organisés." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0094/document.

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Dans ce travail, les propriétés des oxydes de titane mésoporeux organisés ont été étudiées en détail. La synthèse de ces matériaux a été mise au point auparavant au laboratoire à l’aide d’une méthode combinant le mécanisme transcriptif à partir des cristaux liquides du copolymère bloc P123 et la méthode EISA. Tout d’abord, une optimisation des conditions d’élimination du tensioactif a été effectuée en testant des méthodes d’extraction à partir de solvant et des méthodes thermiques. L’élimination du P123 par l’eau suivie d’un rinçage à l’acétone est efficace, simple et rapide et en même temps favorise la formation de la phase anatase du TiO2. Par contre, les propriétés photocatalytiques de ces TiO2 extraits à l’eau sont médiocres et ne sont améliorées qu’après calcination. En combinant une extraction du P123 à l’eau avec une calcination les oxydes de titane mésoporeux possédent une meilleure activité photocatalytique que celle de l’anatase commercial. Dans un second temps l’incorporation du zinc et du tungstène dans les TiO2 mésoporeux organisés a été investie dans le but d’améliorer leur activité photocatalytique. L’introduction de faibles quantités de zinc (<10% mol) augmente la surface spécifique ; au-delà la mésostructuration est perdue. L’incorporation du tungstène dans le TiO2 mésoporeux n’a pas d’influence sur l’organisation des mésopores, mais des agrégats de WO3 orthorhombique coexistent avec le réseau mésoporeux de TiO2 anatase. Même si la présence d’oxyde de zinc ou de tungstène dans la matrice TiO2 mésoporeux diminue bien l’énergie bandgap, l’activité photocatalytique ne s’en trouve pas améliorée. D’autre part, la synthèse de matériaux à porosité bimodale, en utilisant deux systèmes mixtes de tensioactifs hydrogéné/fluoré, CTABr/RF8(EO)9 et P123/ RF8(EO)9, a été explorée. Sur la base des diagrammes de phase de ces deux systèmes dans l’eau, les solutions micellaires et les cristaux liquides ont été investis pour préparer des silices mésoporeuses en utilisant les deux mécanismes CTM et LCT. Quand le CTABr est présent une seule taille de pores dans le domaine mésoporeux est observée, toutefois il est possible qu’une bimodalité de type micro-mésopores existe. Par contre, l’utilisation de la phase hexagonale du système P123/RF8(EO)9 permet d’obtenir des matériaux à deux tailles de pores distincts dans le domaine mésoporeux
In this work we will study in detail the properties of the mesoporous TiO2 materials, for which the preparation was developed previously via a method combining Liquid Crystal Templating (LCT) and EISA mechanisms, using P123 as template. We have tested, in the first time, extraction and thermal methods efficiency to eliminate surfactant in order to optimize the P123 elimination step. Removal of P123 using water followed by washing with acetone is effective, easy and promotes the formation of the anatase phase of TiO2. Otherwise, the photocatalytic properties of the obtained TiO2 are not important and can be improved after calcination. Combining extraction using water and calcination give rise to mesoporous TiO2 with better photocatalytic activity than that of commercial anatase. The incorporation of zinc and tungsten in the mesoporous well-ordered TiO2 has been investigated in the third time, in order to improve their photocatalytic activity. The introduction of small amounts of zinc (<10 mol%) increases the surface area; beyond this amount the mesostructure is lost. The incorporation of tungsten in the mesoporous TiO2 does not affect the mesopores organization, and orthorhombic WO3 aggregates are formed beside the mesoporous network of anatase TiO2. Although, the presence of zinc or tungsten oxides in the matrix decreases the bandgap of mesoporous TiO2, the photocatalytic activity is not improved. In the third time, the synthesis of bimodal porosity materials, using a mixed surfactant systems hydrogenated/fluorinated, CTABr/RF8(EO)9 and P123/RF8(EO)9, was explored. Based on the phase diagrams of these two systems in water, micellar solutions and liquid crystals have been investigated to prepare mesoporous silicas using two mechanisms CTM and LCT. When CTABr is present, pores of one size in the mesoporous range are observed, however, it is possible that bimodal type micro-mesopores exist. The use of the hexagonal liquid crystal phase of P123/RF8(EO)9 provides two separate pore sizes materials in the mesoporous range
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Forsman, Erika. "Delaktighet i det bimodalt tvåspråkiga klassrummet : Delaktighet i det bimodalt tvåspråkiga klassrummet." Thesis, Örebro universitet, Institutionen för humaniora, utbildnings- och samhällsvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-45904.

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Mercier, D. "Bimodalité en collisions périphériques et centrales : systématiques et comparaisons." Phd thesis, Université de Caen, 2008. http://tel.archives-ouvertes.fr/tel-00354154.

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La bimodalité dans les collisions d'ions lourds a été observée, ces dernières années, pour différents systèmes sur une large gamme d'énergies incidentes (de 35 MeV/u à 1 GeV/u). Dans cette thèse, nous réalisons une étude systématique du caractère bimodal de la distribution du plus gros fragment produit (Zmax), pour différents systèmes disponibles dans les données INDRA. Les collisions périphériques (Au+Au de 60 à 150 MeV/u et Xe+Sn de 80 à 100 MeV/u) servent de base de travail afin de tester l'influence des différents tris et sélections sur l'observation de la bimodalité. Deux interprétations possibles sont alors envisagées en s'appuyant sur des modèles : soit cette observation est due à la dynamique de la collision (ELIE), soit elle est reliée à la désexcitation d'une source (SMM) signant ainsi une transition de phase. Les résultats supportent la seconde interprétation. On considère alors Zmax comme paramètre d'ordre, et une procédure de repondération de l'énergie d'excitation (E*) permet d'extraire la chaleur latente de la transition. Pour les collisions centrales (Ni+Ni de 32 MeV/u à 74 MeV/u et Xe+Sn de 25 à 50 MeV/u), les événements conduisant à la formation de mono-source sont isolés par l'intermédiaire d'une méthode statistique (Analyse Factorielle Discriminante). La bimodalité sur Zmax est alors étudiée, en cumulant les différentes données disponibles selon l'énergie incidente et en appliquant la repondération sur la distribution d'énergie d'excitation ainsi obtenue. Le comportement bimodal est beaucoup moins net que celui observé dans les collisions périphériques. Les raisons de cette différence sont discutées.
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Mercier, Damien. "Bimodalité en collisions périphériques et centrales : systématiques et comparaisons." Caen, 2008. http://www.theses.fr/2008CAEN2043.

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La bimodalité dans les collisions d’ions lourds a été observée, ces dernières années, pour différents systèmes sur une large gamme d’énergies incidentes (de 35 MeV/u à 1 GeV/u). Dans cette thèse, nous réalisons une étude systématique du caractère bimodal de la distribution du plus gros fragment produit (Zmax), pour différents systèmes disponibles dans les données INDRA. Les collisions périphériques (Au+Au de 60 à 150 MeV/u et Xe+Sn de 80 à 100 MeV/u) servent de base de travail afin de tester l’influence des différents tris et sélections sur l’observation de la bimodalité. Deux interprétations possibles sont alors envisagées en s’appuyant sur des modèles : soit cette observation est due à la dynamique de la collision (ELIE), soit elle est reliée à la désexcitation d’une source (SMM) signant ainsi une transition de phase. Les résultats supportent la seconde interprétation. On considère alors Zmax comme paramètre d’ordre, et une procédure de repondération de l’énergie d’excitation (E*) permet d’extraire la chaleur latente de la transition. Pour les collisions centrales (Ni+Ni de 32 MeV/u à 74 MeV/u et Xe+Sn de 25 à 50 MeV/u), les événements conduisant à la formation de mono-source sont isolés par l’intermédiaire d’une méthode statistique (Analyse Factorielle Discriminante). La bimodalité sur Zmax est alors étudiée, en cumulant les différentes données disponibles selon l’énergie incidente et en appliquant la repondération sur la distribution d’énergie d’excitation ainsi obtenue. Le comportement bimodal est beaucoup moins net que celui observé dans les collisions périphériques. Les raisons de cette différence sont discutées
During the last few years, bimodality in heavy ions collisions has been observed for different systems, on large energy scale (from 35 MeV/u up to 1 GeV/u). In this thesis, the bimodal behaviour of the largest fragment distribution (Zmax) is studied for different INDRA data sets. For peripheral collisions (Au+Au from 60 to 150 MeV/u, Xe+Sn 80-100 MeV/u), the influence of sorting and selections on bimodality is tested. Then, two different approaches based on models are considered. In the first one (ELIE), bimodality would reflect mainly the collision geometry and the Fermi motion of the nucleon. In the second one (SMM), bimodality would reflect a phase transition of nuclear matter. The data are in favour of the second model. Zmax can then be considered as an order parameter of the transition. A reweighting procedure producing a flat excitation energy distribution is used to achieve comparisons between various bombarding energies and theoretical predictions based on a canonical approach. A latent heat of the transition is extracted. For central collisions (Ni+Ni from 32 to 74 MeV/u and Xe+Sn from 25 to 50 MeV/u) single source events are isolated by a Discriminant Factor Analysis. Bimodality is then looked for, in cumulating the different incident energies and in applying the reweighting procedure of the corresponding excitation energy as done for peripheral collisions. The bimodality behaviour is less evidence for central collisions than for peripheral ones. The possible reasons of this difference are discussed
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Lee, Dana K. "Evidence of gulf stream bimodality on a several month timescale." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/25951.

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Maltais, Martin. "La politique de bimodalité de l'UQÀM de 2000 à 2011." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/29100/29100.pdf.

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Aubrey, Andrew James. "Exploiting the bimodality of speech in the cocktail party problem." Thesis, Cardiff University, 2008. http://orca.cf.ac.uk/54719/.

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The cocktail party problem is one of following a conversation in a crowded room where there are many competing sound sources, such as the voices of other speakers or music. To address this problem using computers, digital signal processing solutions commonly use blind source separation (BSS) which aims to separate all the original sources (voices) from the mixture simultaneously. Traditionally, BSS methods have relied on information derived from the mixture of sources to separate the mixture into its constituent elements. However, the human auditory system is well adapted to handle the cocktail party scenario, using both auditory and visual information to follow (or hold) a conversation in a such an environment. This thesis focuses on using visual information of the speakers in a cocktail party like scenario to aid in improving the performance of BSS. There are several useful applications of such technology, for example: a pre-processing step for a speech recognition system, teleconferencing or security surveillance. The visual information used in this thesis is derived from the speaker's mouth region, as it is the most visible component of speech production. Initial research presented in this thesis considers a joint statistical model of audio and visual features, which is used to assist in control ling the convergence behaviour of a BSS algorithm. The results of using the statistical models are compared to using the raw audio information alone and it is shown that the inclusion of visual information greatly improves its convergence behaviour. Further research focuses on using the speaker's mouth region to identify periods of time when the speaker is silent through the development of a visual voice activity detector (V-VAD) (i.e. voice activity detection using visual information alone). This information can be used in many different ways to simplify the BSS process. To this end, two novel V-VADs were developed and tested within a BSS framework, which result in significantly improved intelligibility of the separated source associated with the V-VAD output. Thus the research presented in this thesis confirms the viability of using visual information to improve solutions to the cocktail party problem.
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Harris, William E., Stephanie M. Ciccone, Gwendolyn M. Eadie, Oleg Y. Gnedin, Douglas Geisler, Barry Rothberg, and Jeremy Bailin. "GLOBULAR CLUSTER SYSTEMS IN BRIGHTEST CLUSTER GALAXIES. III. BEYOND BIMODALITY." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/622870.

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We present new deep photometry of the rich globular cluster (GC) systems around the Brightest Cluster Galaxies UGC 9799 (Abell 2052) and UGC 10143 (Abell 2147), obtained with the Hubble Space Telescope (HST) ACS and WFC3 cameras. For comparison, we also present new reductions of similar HST/ACS data for the Coma supergiants NGC 4874 and 4889. All four of these galaxies have huge cluster populations (to the radial limits of our data, comprising from 12,000 to 23,000 clusters per galaxy). The metallicity distribution functions (MDFs) of the GCs can still be matched by a bimodal-Gaussian form where the metal-rich and metal-poor modes are separated by similar or equal to 0.8 dex, but the internal dispersions of each mode are so large that the total MDF becomes very broad and nearly continuous from [Fe/H] similar or equal to-2.4 to solar. There are, however, significant differences between galaxies in the relative numbers of metal-rich clusters, suggesting that they underwent significantly different histories of mergers with massive gas-rich halos. Last, the proportion of metal-poor GCs rises especially rapidly outside projected radii R >= 4 R-eff, suggesting the importance of accreted dwarf satellites in the outer halo. Comprehensive models for the formation of GCs as part of the hierarchical formation of their parent galaxies will be needed to trace the systematic change in structure of the MDF with galaxy mass, from the distinctly bimodal form in smaller galaxies up to the broad continuum that we see in the very largest systems.
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Parker, Marine. "Ethologie et rythmes biologiques du chat." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAJ126/document.

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Les rythmes biologiques aident les organismes vivants à programmer la plupart des processus comportementaux dans la fenêtre temporelle la plus appropriée. Les données de la littérature sur la rythmicité du chat domestique sont rares et conflictuelles. Pour approfondir nos connaissances sur le sujet, nous avons utilisé de récentes technologies de télémétrie pour enregistrer et caractériser les rythmes journaliers d'activité locomotrice et de prises alimentaire chez des chats en fonction des saisons et des conditions d’hébergement. Les rythmes des chats étaient modifiés par la photopériode et la présence humaine. Suivant une périodicité de 24 heures, ils ont affiché une bimodalité dans leurs rythmes quotidiens, avec des creux d'activité locomotrice et de consommation au milieu de la journée et de la nuit. Les deux périodes principales d'activité/alimentaires correspondaient à l'aube et au crépuscule à chaque saison, indépendamment de leur horaire, confirmant la nature intrinsèque crépusculaire de l'espèce. Le rythme alimentaire des chats était plus variable au cours du cycle que celui de leur activité locomotrice, rappelant ainsi le caractère opportuniste de ce prédateur. Les chats ont présenté une plasticité comportementale caractérisée par des rythmes plus faibles et un comportement d'exploration plus nocturne en milieu extérieur qu’en milieu intérieur, au sein duquel ils étaient plus enclins à la routine. Nos résultats ouvrent la voie au développement de solutions nutritionnelles et des recommandations d’hébergement adaptées aux rythmes du chat en respectant les besoins physiologiques de l’animal
Biological rhythms are of importance for living organisms as they help to schedule most behavioural processes within the most suitable temporal window. Literature on daily rhythmicity is scarce and conflicting regarding domestic cats. To sharpen our knowledge on the subject, we used advanced telemetry technologies to record and characterise the daily rhythms of locomotor activity and feeding in cats according to the seasons and housing conditions. The cats were sensitive to photoperiod and to human presence. Along 24-hour periodicity, they displayed bimodality in their daily patterns, with mid-day and mid-night troughs of locomotor activity and food consumption. The two main activity/eating periods corresponded to dawn and dusk at each season, regardless of the twilight timings, confirming the crepuscular intrinsic nature of the species. The feeding rhythm of the cats was more variable daily than their locomotor activity one, recalling the opportunistic character of this predator. Cats displayed plasticity in their behaviour, such as weaker daily rhythms and more nocturnal exploratory behaviour outdoors, compared to indoors where they were more prone to routine. Our results open new avenues for developing nutritional and housing guidelines fitted to the rhythms of the cats according to their way of life
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Rivet, Bertrand. "La bimodalité de la parole au secours de la séparation de sources." Phd thesis, Grenoble INPG, 2006. http://tel.archives-ouvertes.fr/tel-00200871.

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Cette thèse est dédiée à la modélisation conjointe des modalités audio et vidéo de la parole et à son exploitation pour la séparation de sources. Tout d'abord, une modélisation probabiliste bimodale de la parole audiovisuelle à base de mélange de noyaux est proposée. Cette modélisation est ensuite exploitée pour la détection des silences. De plus, nous proposons une détection purement visuelle des silences en s'appuyant sur l'observation des lèvres du locuteur. Ce dernier procédé présente l'avantage d'être indépendant d'un bruit acoustique. Ces deux modélisations sont ensuite exploitées pour la séparation de mélanges convolutifs de sources audiovisuelles. Nous résolvons ainsi le problème classique des indéterminations des méthodes de séparation dans le domaine fréquentiel avant de proposer une méthode géométrique qui utilise les périodes de silence de la source d'intérêt. Les algorithmes proposés sont validés par des expériences sur des corpus multi-locuteurs et multi-langues.
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Books on the topic "Bimodalità"

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D'Alfonso, Aldo. Bimodalit`a cognitiva e prospettive terapeutiche: Un approccio alle problematiche linguistiche ed emozionali. Roma: Verduci Editore, 1999.

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National Aeronautics and Space Administration (NASA) Staff. On the Bimodality of Enso Cycle Extremes. Independently Published, 2018.

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National Aeronautics and Space Administration (NASA) Staff. On the Bimodality of Enso Cycle Extremes. Independently Published, 2018.

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Book chapters on the topic "Bimodalità"

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Tully, R. Brent, and Marc A. W. Verheijen. "Bimodality of Freeman’s Law." In Galaxy Scaling Relations: Origins, Evolution and Applications, 119–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-540-69654-4_14.

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Broggi, G., L. A. Lugiato, and A. Colombo. "Theory of Transient Optical Bimodality." In Springer Proceedings in Physics, 209–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-46580-2_57.

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Cataño, Miguel Angel, and Joan Climent. "A New Morphological Measure of Histogram Bimodality." In Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications, 390–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33275-3_48.

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Mallik, S., G. Chaudhuri, F. Gulminelli, and S. Das Gupta. "Statistical and Dynamical Bimodality in Multifragmentation Reactions." In Springer Proceedings in Physics, 27–40. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9062-7_3.

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Hobson, Allan, and Ursula Voss. "Lucid dreaming and the bimodality of consciousness." In New Horizons in the Neuroscience of Consciousness, 155–66. Amsterdam: John Benjamins Publishing Company, 2010. http://dx.doi.org/10.1075/aicr.79.21hob.

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Gehrels, Tom. "Bimodality and the Formation of Saturn's Ring Particles." In 1980, Pioneer Saturn, 5917–24. Washington, DC: American Geophysical Union, 2014. http://dx.doi.org/10.1002/9781118782101.ch26.

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Gintzler, Alan R. "Relevance of Opioid Bimodality to Tolerance/Dependence Formation." In The Brain Immune Axis and Substance Abuse, 73–83. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-1951-5_11.

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Lange, Wulfhard. "Dynamics of Optical Bistability in Sodium and Transient Bimodality." In Instabilities and Chaos in Quantum Optics II, 265–80. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4899-2548-0_17.

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D’Ambrogio, E. G. "On the Phenomenon of Bimodality in Aggregation Pattern Dynamics." In Integrative Systems Approaches to Natural and Social Dynamics, 85–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56585-4_5.

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Seman, Noraini, Rosniza Roslan, Nursuriati Jamil, and Norizah Ardi. "Bimodality Streams Integration for Audio-Visual Speech Recognition Systems." In Hybrid Intelligent Systems, 127–39. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-27221-4_11.

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Conference papers on the topic "Bimodalità"

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Broggi, G., L. A. Lugiato, and A. Colombo. "Theory of Transient Optical Bimodality." In Optical Bistability. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/obi.1985.tud3.

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From a statistical viewpoint, the signature of optical bistability is the two-peaked character of its stationary probability distribution. However, the exceedingly long lifetime of the two metastable states makes the experimental observation very difficult. We recently showed (1) that the critical slowing down can produce the emergence of a double-peaked distribution during the transient, with a scenario that is accessible to experimental observation, a goal that has been brilliantly achieved by the Hannover group (2) using optically pumped sodium vapour. This phenomenon, called transient bimodality, is universal in the sense that it arises in all systems that, at a deterministic level, exhibit a long induction stage followed by a fast switching to the steady state (3). And, in fact, the Hannover team observed this phenomenon also in an electronic system (4).
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Baldry, I. K. "Color bimodality: Implications for galaxy evolution." In THE NEW COSMOLOGY: Conference on Strings and Cosmology; The Mitchell Symposium on Observational Cosmology. AIP, 2004. http://dx.doi.org/10.1063/1.1848322.

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Mannucci, F., N. Panagia, M. Della Valle, Stefan Immler, and Kurt Weiler. "The bimodality of type Ia Supernovae." In SUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters. AIP, 2007. http://dx.doi.org/10.1063/1.2803580.

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Mannucci, F., N. Panagia, M. Della Valle, Stefan Immler, and Kurt Weiler. "The bimodality of type Ia Supernovae." In SUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters. AIP, 2007. http://dx.doi.org/10.1063/1.3682919.

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Wang, V. C. "Origin of the gamma-ray burst duration bimodality." In Gamma-ray bursts: 3rd Huntsville symposium. AIP, 1996. http://dx.doi.org/10.1063/1.51726.

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Modi, K. B., K. G. Saija, K. B. Zankat, C. R. Kathad, S. J. Shah, V. K. Lakhani, N. H. Vasoya, and T. K. Pathak. "Observation of bimodality in nanocrystalline cobalt - ferri - chromites." In NANOFORUM 2014. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4917742.

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Guo, Fulai, S. Peng Oh, M. Ruszkowski, Sebastian Heinz, and Eric Wilcots. "AGN Feedback and Bimodality in Cluster Core Entropy." In THE MONSTER’S FIERY BREATH: FEEDBACK IN GALAXIES, GROUPS, AND CLUSTERS. AIP, 2009. http://dx.doi.org/10.1063/1.3293068.

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Hanff, Ernest S., and Ian G. Campbell. "Velocity Field Bimodality in an Axisymmetric Diffusion Flame Combustor." In International Heat Transfer Conference 12. Connecticut: Begellhouse, 2002. http://dx.doi.org/10.1615/ihtc12.5090.

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Bernhardt, Sylvain, Jerome Boutet, Francois Duboeuf, Aurelie Laidevant, Jean-Marc Dinten, and Didier Vray. "Bimodality ultrasound/optical imaging: Registration and 2D/3D visualization." In 2010 IEEE Ultrasonics Symposium (IUS). IEEE, 2010. http://dx.doi.org/10.1109/ultsym.2010.5935719.

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Lang, Robert J., and Amnon Yariv. "Intermodal Bistability and Bimodality in Coupled-Cavity Semiconductor Lasers." In Instabilities and Dynamics of Lasers and Nonlinear Optical Systems. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/idlnos.1985.wd33.

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Coupled-cavity semiconductor lasers are known to exhibit bistability under certain circumstances. There are two distinctly different manifestations of bistability; in the first, the laser is capable of exciting the same longitudinal mode at different power and carrier densities (intramodal bistability); in the second, the laser switches between two different longitudinal modes (intermodal bistability). The latter case is the subject of this paper.
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