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Literatura académica sobre el tema "Algorithme d'alignement"
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Tesis sobre el tema "Algorithme d'alignement"
Gagnon, Bruno. "Système d'alignement d'une partition de musique basé sur la déformation dynamique étendue du temps". Mémoire, Université de Sherbrooke, 2009. http://savoirs.usherbrooke.ca/handle/11143/1487.
Texto completoJubert, Manon. "Algorithme de planification de numérisation et d’alignement de nuages de points 3D pour le contrôle in-situ de pièces mécaniques en cours d’usinage". Electronic Thesis or Diss., Aix-Marseille, 2021. http://www.theses.fr/2021AIXM0233.
Texto completoIn this thesis work, we deal with the problem of scan planning and we also address the problem of 3D point clouds alignment. These problems can be studied and globalized to meet the needs of many fields of study. In this manuscript, we answer the following question: how to automatically control a mechanical part during machining? Or more precisely: how to obtain a good representation of the part so as to check its good conformity during the machining process? The first contribution to this study is the development of an automatic algorithm for planning the digitization of the part according to the controls to be carried out on it. The approach allows to adapt to any optical digitizing device. In our study, we show the results of this method on several fringe projection optical sensors and on several industrial parts. The proposed method is general and allows to adapt to any industrial environment in which the part to be controlled is positioned. The second contribution focuses on the specific case of data from optical sensors, i.e. 3D point clouds. From the scanning plan, we develop a strategy for aligning point clouds between them. We address the problem of cases where the alignment of point clouds is not possible and try to solve this problem. Finally, we show several industrial applications of these algorithms, and we study the precision of the methods on these cases. We propose several openings on the continuation of this work, in particular on the specific cases of non-alignable parts or on large parts. Ideas for improvement and robustification of the algorithms are discussed
Wang, Wei. "Alignement pratique de structure-séquence d'ARN avec pseudonœuds". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS563/document.
Texto completoAligning macromolecules such as proteins, DNAs and RNAs in order to reveal, or conversely exploit, their functional homology is a classic challenge in bioinformatics, with far-reaching applications in structure modelling and genome annotation. In the specific context of complex RNAs, featuring pseudoknots, multiple interactions and non-canonical base pairs, multiple algorithmic solutions and tools have been proposed for the structure sequence alignment problem. However, such tools are seldom used in practice, due in part to their extreme computational demands, and because of their inability to support general types of structures. Recently, Rinaudo et al. gave a fully general parameterised algorithm for structure-sequence comparison, which is able to take as input any type of pseudoknotted structures. The parameterised algorithm is a tree decomposition based dynamic programming. To accelerate the dynamic programming algorithm without losing two much accuracy, we introduced a banded dynamic programming. Then three algorithms are introduced to get the suboptimal structure-sequence alignments. Furthermore, we introduce the notation Maximum Expected structure-sequence Alignment (MEA) to compute an alignment with maximum expected accuracy over a set of alignments. The Boltzmann match probability are computed based on the inside-outside algorithm. The algorithms are implemented in a software named LiCoRNA (aLignment of Complex RNAs). We first evaluate the performance of LiCoRNA on the seed alignment in the pseudoknotted RFAM families. Compared to the state-of-the-art algorithms, LiCoRNA shows generally equivalent or better results than its competitors. With the high accuracy showed by LiCoRNA, we further curate RFAM full pseudoknotted alignment. The reason why we realign full alignments is that covariance model does not support pseudoknot which may lead to misalign when building the full alignment
Derrien, Vincent. "Heuristiques pour la résolution du problème d'alignement multiple". Phd thesis, Université d'Angers, 2008. http://tel.archives-ouvertes.fr/tel-00352784.
Texto completoLe premier algorithme, Plasma utilise une méthode de descente, dont chaque itération consiste à réaliser des insertions de colonnes de brèches dans deux alignements multiples à aligner. Le second algorithme, Plasma II , est basé sur le principe de la programmation dynamique. Nous généralisons ici l'algorithme utilisé pour l'alignement de deux séquences, et étendons le cadre de la programmation dynamique `a l'alignement de deux alignements multiples. Cet algorithme ainsi que plusieurs variantes sont intensivement évalués sur les jeux d'essais de Balibase, montrant des résultats encourageants, voire compétitifs, par rapport à certains algorithmes de référence comme Clustal W, tant sur la qualité de l'alignement que sur le temps de calcul.
Awdé, Ali. "Comparaison de deux techniques de décodage pour la traduction probabiliste". Thèse, 2003. http://hdl.handle.net/1866/14511.
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