Дисертації з теми "Recherche de clones"
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Ben, Khelifa Khadija. "Recherche des mécanismes d'inactivation chromosomique chez les clones diploides non-complémentants produits par fusion de protoplastes de Bacillus subtilis." Paris 11, 1985. http://www.theses.fr/1985PA112048.
Poissonnier, Marie. "Étude expérimentale de la mycorhization in vitro de clones d'eucalyptus gunnii et eucalyptus gunnie x eucalyptus dalrympleana : Recherche de facteurs impliqués dans l'obtention de synthèses ectomycorhiziennes de ces clones par pisolithus tinctorius." Nancy 1, 1989. http://www.theses.fr/1989NAN10238.
Charbit, Erika. "Recherche de marqueurs moléculaires de la capacité embryogène et de la capacité regénérante de cals friables d'Hevea brasiliensis (Mue͏̈ll. -Arg. )." Montpellier 2, 2002. http://www.theses.fr/2002MON20169.
Clofent-Sanchez, Gisèle. "Recherche du stade ontogénique de la cellule souche dans le myélome multiple : étude par clonage en dilution limite et par réarrangements des gènes d'immunoglobuline." Montpellier 2, 1989. http://www.theses.fr/1989MON20080.
Benoit, Tristan. "Cartographie des programmes et de leurs interrelations." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0320.
In the field of software engineering, ensuring the quality and security of software is complex. This context is due to a set of factors, notably the increasing use of libraries and the use of practices such as copying codes from online services. The usual solution to this problem is the application of formal methods for program validation before their release. However, this approach requires a precise specification and a high degree of expertise. This thesis introduces new reverse engineering methods to automatically collect information about a program toolchain provenance and identify program clones within large data repositories. Our first contribution is the innovative neural network model Site Neural Network (SNN), which predicts the compilation toolchain used to produce an entire program. SNN offers excellent speed as well as good accuracy. Its modularity due to the use of hierarchies of classifiers allows for easy consideration of additional toolchains. Our second contribution is the Program Spectral Similarity (PSS), a tool that provides a quick and efficient way to detect program clones, even when their target hardware architecture differs or in the case of obfuscation. Unlike binary function-based methods or graph edit distance methods, which are time-consuming and low resilient, PSS relies on the spectral analysis of graphs to measure the similarity between programs. This thesis thus contributes to cyber security by providing tools to identify malware clones quickly. In addition, it supports computer forensics by providing relevant information on the compilation chain. This work paves the way for new neural networks for programs, as well as the development of spectral graph analysis methods for studying binary code similarity
Ayour, Jamal. "Contribution à l'étude de la diversité génétique et recherche des paramètres physicochimiques et biochimiques indicateurs de la qualité au cours de la maturation des fruits d'abricots frais et après transformation." Thesis, Avignon, 2018. http://www.theses.fr/2018AVIG0704.
The problematic of this thesis is based on the characterization of the quality of apricotsand their aptitude for industrial processing. Three main axes guided this study. The first oneconsisted initially of a global morphometric characterization of Moroccan apricot clonesmaintened in experimental station of INRA of Marrakech and followed by the analysis ofgenetic diversity. 92 accessions, from different geographical regions, were genotyped using21 microsatellite markers. Indeed, the analyzed collection was characterized by a highpolymorphism and a reduced genetic diversity. A total of 120 alleles were identified with anaverage of 5.71 alleles per locus. All the statistical evidence (hierarchical analysis, PCA andstructural analysis) show that the genetic structure of Moroccan apricot can be subdivided intotwo populations : a major population made up of most accessions of genetic groups (authenticpopulation linked in particular to the Delpatriarca variety) and a second less diversifiedpopulation related to all reference varieties, including the Canino variety. The observedvariability between the 92 genotypes could be an asset to improve the apricot cultivation andto allow a sustainable development in the space and the time of the fruit by the selection ofnew genotypes of apricots. Finally, the observed genetic variability was used in the selectionof new apricot clones for phenotypic analysis. The second axis focused on the study ofbiochemical markers that allow to understand and evaluate the quality of selected apricots,namely : the change of organic acids and soluble sugars in relation to the sensory quality, thedevelopment of pigments and color change, the evolution of phenolic compounds in relationto antioxidant activity and loss of texture according to the cell wall biochemistry. Indeed,good physicochemical and biochemical properties have been reported for the ten chosenclones (Maximum values reported for some bioactif compounds : Vitamin C = 0.15 g / kg, β-carotene = 149.251 μg / kg, provitamin A = 0.028 mg / kg), as well as the qualitative traitsassociated with the maturation season and the genotype, is certainly a valuable genetic sourceto extend the apricot season and to supply stalls and industry. The third axis was on theimplication of the texture of the fruit in the industrial processing of apricot. We analyzed thevarietal ability of apricots for industrial processing by analyzing their textural propertiesbefore and after processing. And to better understand the variability of apricot texture, westudied the impact of heat treatment depending on the stage of fruit harvesting on a widerange of French cultivars. In the end, five apricots varieties were chosen as the mostappropriate for the industrial process
Wilkin, Françoise. "Recherche de nouveaux gènes impliqués dans la régulation de la fonction thyroïdienne: clonage et expression du clone C5FW codant pour une nouvelles phosphoprotéine." Doctoral thesis, Universite Libre de Bruxelles, 1997. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/212228.
Romion, Jennifer. "Les vêtements dans l'univers funéraire de l'Egypte pharaonique : recherches lexicographiques et iconographiques d'après les textes des Pyramides." Thesis, Montpellier 3, 2013. http://www.theses.fr/2013MON30101.
The Pyramid Texts borrow from the daily life of Ancient Egyptian a lot of words,making those objects a priori profane to divine attributes or components of funeraryequipment accompanying the deceased during his ascension. The case of textile artifacts(clothes and garments) is particularly affluent.By resuming the identification of each item, on a point of view so iconographical aslexicographical, and to take account of used context, it is able to understand what wasthe motivation of its : institutional lore inherited from first dynasty, theological senses orprivate functional preoccupations
Savonet, Valérie. "Recherche de nouveaux gênes impliqués dans la régulation de la fonction thyroïdienne :clonage et expression du clone C3VS codant pour une nouvelle protéine présentant 6 motifs "ankyrine"." Doctoral thesis, Universite Libre de Bruxelles, 2000. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211757.
Sauvage, Valentin. "Development of a Closed-Cycle Dilution Refrigerator for future cosmological missions." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASP035.
Developing a Closed-Cycle Dilution Refrigerator for cosmic microwave background (CMB) study would significantly advance experimental cosmology. This type of refrigerator allows the detectors to be cooled continuously at extremely low temperatures (100 mK) using ³He and ⁴He. Unlike its predecessor, the Open-Cycle Dilution Refrigerator used for on the space mission Planck-HFI, the closed-cycle design allows for the cooling process to be repeated indefinitely. This does not limit the mission's duration to the quantity of embarked helium anymore. The ³He -⁴He mixture, producing the cooling power, is separated into the two components ³He and ⁴He, and re injected into the system. This ensures meeting the needs of future missions: more cooling power (OCDR < 0.2 μW, CCDR > 2 μW), longer observation time (OCDR < 2.5 years, CCDR > 3 years) with the same temperature stability (20 nK.Hz⁻⁰•⁵).The CCDR needs development to operate in a microgravity environment. The ³He -⁴He mixture is injected inside the still, where the porous sponge will separate the liquid phase from the gaseous phase. The circulator will pump the gaseous phase (mainly ³He). The superfluid ⁴He is extracted from the liquid phase by the fountain pump. Both isotopes are then re-injected into the system, perpetuating the cooling-power generation. Various experiments demonstrated its proper operation in a laboratory environment, making the CCDR a TRL ₄ technology. For a space application, the CCDR has to reach TRL ₅. Developing an Engineering Model will demonstrate the CCDR's proper operation in a relevant environment. This thesis reports on the progress in this development. A Structural and Thermal Model (STM) has been designed to host the multiple CCDR components in a restricted volume and mass. This STM, a hexapod, will handle the vibrations from a rocket launch while limiting the thermal exchanges between the various temperature stages. A rigorous material selection has been performed to optimize the structure stiffness regarding the thermal flux reaching the coldest stage
Bendella, Meryem. "Fouille de données provenant des réseaux sociaux pour la détection et la recherche." Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0612.
Social networks have gained a significant interest for society during our decade. These platforms allow users to produce, share and exchange various content. Twitter is one of the most popular social networks that allow users to publish messages, called tweets. These tweets may contain offensive texts, such as harassment or bullying messages, or information related to abnormal topics. Many research studies have shown how such social content can have an impact on users and cause psychological harm. Developing a system for detecting such type of messages is necessary to protect the user and predict tragic events. The work presented in this thesis is brought into the context of data mining from Twitter to identify and detect such messages. We propose a suspicious tweets detection system based on probabilistic topic models and fuzzy logic. In order to identify harassment tweets, we introduce a classification model that exploits a set of features and uses supervised learning algorithms. People also use social networks to search for relevant posts that satisfy their information need where this need is usually formulated using a textual query. Twitter’s messages are short and access to information is sometimes difficult because of the variety of published content and huge amount of data generated. The second part of this work deals with the context of social information retrieval and aims to improve tweets retrieval quality. We propose a query expansion approach to overcome the shortness of user queries and tweets by extracting frequent closed patterns and using word embeddings
Privat, François. "Faisabilité du recyclage en boucle fermée des déchets post-consommateurs en bois massif." Thesis, Ecole centrale de Nantes, 2019. http://www.theses.fr/2019ECDN0043.
The forestry-wood sector is increasingly integrating the issues of circularity (resources, economy, environment), and the European hierarchy of waste treatment methods requires that complementary recovery routes for post-consumer waste are investigated. This work evaluates the technical, economic and environmental feasibility of closed-loop recycling of solid wood waste. The characterization of Class B wood waste (not pressure-treated) obtained from recycling centres indicates the potential of manufacturing glued laminated joinery planks. An industrial process for homogenizing the properties has been developed and tested, which includes: purging of metals, decontamination and cutting to lamellae, purging of defects, finger-jointing and laminating the slats to make laminated products. It is demonstrated that removing 2 mm from the surface permits the production of lamellae that have contamination levels lower than the limits used by the particleboard sector. The material yield of lamellae was optimized using a numerical model, then validated and completed by experimentation on the whole process at the pilot scale (a 30 % yield is obtained for products matching class J30 made of 20 mm × 60 mm lamellae). Mechanical tests showed properties similar to the reference values for classes C30 or GL24h and no influence of aging was observed. A life-cycle analysis has shown that this process is environmentally favourable with respect to landfilling, panel recycling, and medium-term energy recovery, and that it can be as economically favourable as energy generation
Abboud, Yacine. "Fouille de motifs : entre accessibilité et robustesse." Electronic Thesis or Diss., Université de Lorraine, 2018. http://www.theses.fr/2018LORR0176.
Information now occupies a central place in our daily lives, it is both ubiquitous and easy to access. Yet extracting information from data is often an inaccessible process. Indeed, even though data mining methods are now accessible to all, the results of these mining are often complex to obtain and exploit for the user. Pattern mining combined with the use of constraints is a very promising direction of the literature to both improve the efficiency of the mining and make its results more apprehensible to the user. However, the combination of constraints desired by the user is often problematic because it does not always fit with the characteristics of the searched data such as noise. In this thesis, we propose two new constraints and an algorithm to overcome this issue. The robustness constraint allows to mine noisy data while preserving the added value of the contiguity constraint. The extended closedness constraint improves the apprehensibility of the set of extracted patterns while being more noise-resistant than the conventional closedness constraint. The C3Ro algorithm is a generic sequential pattern mining algorithm that integrates many constraints, including the two new constraints that we have introduced, to provide the user the most efficient mining possible while reducing the size of the set of extracted patterns. C3Ro competes with the best pattern mining algorithms in the literature in terms of execution time while consuming significantly less memory. C3Ro has been experienced in extracting competencies from web-based job postings
Abboud, Yacine. "Fouille de motifs : entre accessibilité et robustesse." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0176/document.
Information now occupies a central place in our daily lives, it is both ubiquitous and easy to access. Yet extracting information from data is often an inaccessible process. Indeed, even though data mining methods are now accessible to all, the results of these mining are often complex to obtain and exploit for the user. Pattern mining combined with the use of constraints is a very promising direction of the literature to both improve the efficiency of the mining and make its results more apprehensible to the user. However, the combination of constraints desired by the user is often problematic because it does not always fit with the characteristics of the searched data such as noise. In this thesis, we propose two new constraints and an algorithm to overcome this issue. The robustness constraint allows to mine noisy data while preserving the added value of the contiguity constraint. The extended closedness constraint improves the apprehensibility of the set of extracted patterns while being more noise-resistant than the conventional closedness constraint. The C3Ro algorithm is a generic sequential pattern mining algorithm that integrates many constraints, including the two new constraints that we have introduced, to provide the user the most efficient mining possible while reducing the size of the set of extracted patterns. C3Ro competes with the best pattern mining algorithms in the literature in terms of execution time while consuming significantly less memory. C3Ro has been experienced in extracting competencies from web-based job postings
Chekoubi, Zakaria. "Problème intégré de dimensionnement de lots et de tournées de véhicules avec remanufacturing des produits en fin de vie." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0209.
In a traditional supply chain, production, inventory and distribution operations are treated separately due to the complexity of jointly planning these operations and the lack of information shared among stakeholders. Today, in order to face the fierce competition in the global market, companies are forced to jointly plan these activities in order to benefit from the economic and environmental benefits generated by this integration. Among the optimization problems existing in the literature, the integrated planning problem which jointly optimizes production, inventory management, distribution and vehicle routes decisions, has recently received considerable attention, despite its NP-hardiness. Indeed, its benefits in terms of synchronization between processes, cost reduction and improved service level can be significant. In addition, the optimization of this problem in the context of closed-loop supply chains with End-of-Life Product (EOL) management leads to the development of increasingly sustainable supply chains. Furthermore, growing concerns about environmental issues linked to industrial activities have led to the emergence of policies to control carbon emissions. Taking these regulations into account can have a positive impact on the company's environmental responsibility. To meet these challenges, the objective of this thesis is to design models and develop optimization approaches to solve an integrated planning problem of production, remanufacturing, storage and direct-reverse distribution operations. We considered a closed-loop supply chain consisting of a production line for new products, a remanufacturing line for returned EOL products, two types of inventories for reusable products and EOL ones to be remanufactured, as well as customers with dynamic demands for delivery and pickups. The goal is to determine the optimal amounts to produce, remanufacture and store, as well as the order of visiting customers in order to meet their requests simultaneously for delivery and pickup, while minimizing the total cost due to the involved operations. First, a linear integer model is proposed to optimize the supply chain system by considering one or more vehicles with limited capacity. The second part of the thesis concerns the development of a two-phase decomposition heuristic to solve the extended integrated model. The last part of the thesis is devoted to the integration of carbon dioxide emissions into production, remanufacturing, inventory and distribution decisions and to study the behavior of carbon emission levels in the context of cap-and-trade policy. Numerical experiments make it possible to demonstrate the applicability and the limits of our approaches