Gotowe bibliografie tematyczne / Hybrid dimensional systems

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Gotowa bibliografia na temat „Hybrid dimensional systems”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Hybrid dimensional systems"

Asarin, Eugene, Venkatesh P. Mysore, Amir Pnueli i Gerardo Schneider. "Low dimensional hybrid systems – decidable, undecidable, donʼt know". Information and Computation 211 (luty 2012): 138–59. http://dx.doi.org/10.1016/j.ic.2011.11.006.

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Alves, Maria Salom´e Manuelevna, i Manuel Joaquim Alves. "ON STABILIZATION OF DIFFERENTIAL SYSTEMS WITH HYBRID FEEDBACK CONTROL". Tambov University Reports. Series: Natural and Technical Sciences, nr 123 (2018): 331–52. http://dx.doi.org/10.20310/1810-0198-2018-23-123-331-352.

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In this paper two-dimensional systems of differential equations are considered together with their stabilization by a hybrid feedback control. A stabilizing hybrid control for an arbitrary controlled system that belongs to a certain category within two-dimensional systems is constructed as a result of this study and some stabilization proprieties of the system with the obtained hybrid control are presented.

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Dick, R. "Fermions in low-dimensional systems and the transition between bulk and surface properties". Canadian Journal of Physics 86, nr 4 (1.04.2008): 601–10. http://dx.doi.org/10.1139/p07-156.

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We discuss three formalisms for the description of Fermions in low-dimensional systems. Then we consider dimensionally hybrid Hamiltonians with mixed three-dimensional and two-dimensional kinetic terms. These Hamiltonians yield particular dimensionally hybrid Green’s functions with interesting prospects for the description of the transition between two-dimensional and three-dimensional behavior of particles in the presence of attractive interface potentials.PACS Nos.: 05.30.Fk, 71.10.Pm, 73.20.–r

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Perez de Lara, David. "Hybrid Superconducting/Magnetic Multifunctional Devices in Two-Dimensional Systems". Physchem 2, nr 4 (25.11.2022): 347–56. http://dx.doi.org/10.3390/physchem2040025.

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The emergence of unexpected properties in two-dimensional materials, interfaces, and nanostructured materials opens an exciting framework for exploring new devices and applications. Recent advances in materials design and the nano structurization of novel, low-dimensional materials, surfaces, and interfaces offer a novel playground to design efficient multifunctional materials-based devices. Low-dimensional materials exhibit peculiarities in their electronic, magnetic, and optical properties, changing with respect to the bulk when they are layered down to a single layer, in addition to their high tunability. Their crystal structure and chemical bonds lead to inherent unique mechanical properties. The fabrication of van der Waals heterostructures by stacking materials with different properties, the better control of interfaces, and the tunability of the physical properties by mechanical strain, and chemical and electronic doping allow for the exploration of multifunctional devices with superconducting, magnetic, and optical properties and unprecedented degrees of freedom in terms of fabrication and tunability.

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Zawadzki, W. "Hybrid magneto-electric quantisation in quasi-two-dimensional systems". Semiconductor Science and Technology 2, nr 8 (1.08.1987): 550–53. http://dx.doi.org/10.1088/0268-1242/2/8/014.

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Silva, F. W. N., E. Cruz-Silva, M. Terrones, H. Terrones, Vincent Meunier i E. B. Barros. "Spin dependent transport in hybrid one dimensional BNC systems". Semiconductor Science and Technology 34, nr 1 (26.11.2018): 015004. http://dx.doi.org/10.1088/1361-6641/aaeefb.

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Merkt, Ulrich. "Hybrid semiconductor/metal nanostructures with two-dimensional electron systems". Superlattices and Microstructures 33, nr 5-6 (maj 2003): 357–67. http://dx.doi.org/10.1016/j.spmi.2004.02.010.

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Yang, Zhe, Xuerong Mao i Chenggui Yuan. "Comparison theorem of one-dimensional stochastic hybrid delay systems". Systems & Control Letters 57, nr 1 (styczeń 2008): 56–63. http://dx.doi.org/10.1016/j.sysconle.2007.06.014.

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HOMER, M. E., i S. J. HOGAN. "IMPACT DYNAMICS OF LARGE DIMENSIONAL SYSTEMS". International Journal of Bifurcation and Chaos 17, nr 02 (luty 2007): 561–73. http://dx.doi.org/10.1142/s0218127407017422.

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In this paper we present a model of impact dynamics in large dimensional systems. We describe a hybrid method, based on graph theory and probability theory, which enables us qualitatively to model the statistics of global dynamics as parameters are varied. Direct numerical simulation reveals a sudden jump from no impacts within the system to many repeated impacts at a critical value of system parameters. We show that a simple model of the most likely number of impacts also possesses a sudden jump and provides good agreement with the numerical results for large impact probability. A refinement of this model improves the agreement at lower impact probability values.

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Yadav, Vaibhav, i Sharif Rahman. "A hybrid polynomial dimensional decomposition for uncertainty quantification of high-dimensional complex systems". Probabilistic Engineering Mechanics 38 (październik 2014): 22–34. http://dx.doi.org/10.1016/j.probengmech.2014.08.004.

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Rozprawy doktorskie na temat "Hybrid dimensional systems"

zeng, yingfu. "Lightweight Three-Dimensional Visualization For Hybrid Systems Simulation". Thesis, Högskolan i Halmstad, Halmstad Embedded and Intelligent Systems Research (EIS), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-19811.

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Simulation plays a key role in the computer-aided design of systems, primarily because it helps in catching design bugs at an early stage and in quickly ruling out many unreasonable options in the design space. There is a wealth of tools and languages that have been proposed over the years for the design and verification of hybrid systems and most of them provide 3D visualization utility for facilitating design process. However, their visualization systems often rely on some external configuration files written in naive 3D APIs like VRML or Java3D and complicated connections have to be established between the simulation data and the visualization. Numerous efforts have to be invested in visualization related modeling and certain level of understanding of the low level 3D libraries are needed. Thus it is not an easy job for non-professions to build a 3D visualization. In this thesis we explore the idea that in a hybrid system model, almost all the information need for visualization is already in place. This means that very few annotation should be enough to fully specify a useful 3D visualization. Based on this idea, we propose a lightweight 3D visualization framework which allows the user to expresses the three-dimensional object in a high level and abstract way and to take advantage of the data already in the simulation. We evaluate our approaching by building a prototype extension of modeling language called Acumen. The result of this thesis work is included in Acumen's official release version that can be download at www.acumen-language.org. To build a 3D visualization in Acumen, only very few annotations need to be added to the simulation model and are included inside one reserved variable. Non-professions like students who are studying Cyber-physical systems can easily use this tool to visualize their models in Acumen without any prerequisite knowledge regarding 3D visualization technology. We also developed a number of benchmarks to test the correctness and functionality of Acumen3D. Besides, as a lager case study into the expressivity of Acumen and its visualizaiton efficiency, we developed a simplified model of a Ping Pong game. We gained experience about how to model complex hybrid system in Acumen. Moreover by comparing modeling such a hybrid system in Java3D and in Acumen3D, we find concrete evidence that modelling it in Acumen3D is easier in that of less code and less prerequisite knowledge and more supporting built in functions.

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Yunt, Kerim. "Impulsive optimal control of hybrid finite-dimensional Lagrangian systems /". Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17760.

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Kuffer, Dominik. "Photodetectors based on low-dimensional materials and hybrid systems". Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/396277.

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In the last decade, two-dimensional (2D) materials have attracted attention both in the nascent field of flexible nanotechnology as well as in more conventional semiconductor technol-ogies. Within the rapidly expanding portfolio of 2D materials, the group of semiconducting transition metal dichalcogenides (TMDCs) has emerged as an intriguing candidate for various optoelectronic applications. The atomically thin profile, favorable bandgap and outstanding electronic properties of TMDCs are unique features that can be explored and applied in novel photodetecting platforms. This thesis presents highly sensitive two-dimensional phototransistors made of sub-nanometre thick TMDC channels. Firstly, an encapsulation route is developed to address the detrimental and, to date, uncontrollable impact of atmospheric adsorbates, which severely deteriorate detector performance. The passivation scheme improves the transport properties of TMDCs, leading to high photoconductive gain with gate dependent responsivity of 10 -10^4 A/W throughout the visible, and temporal response down to 10 ms, which is suitable for imaging applications. The atomic device thickness yields ultra-low dark current operation and record detectivity of 10^11 - 10^12 Jones for TMDC-based detectors is achieved. The use of monolayer TMDCs, however, has disadvantages like limited spectral absorption due to the bandgap and limited absorption efficiency. In order to increase the absorption and to extend the spectral coverage, TMDC channels are covered with colloidal quantum dots to make hybrid phototransistors. This compelling synergy combines strong and size-tunable light absorption within the QD film, efficient charge separation at the TMDC-QD interface and fast carrier transport through the 2D channel. This results in large gain of 10^6 electrons per absorbed photon and creates the basis for extremely sensitive light sensing. Colloidal quan-tum dots are an ideal sensitizer, because their solution-processing and facile implementation on arbitrary substrates allows for low-cost fabrication of hybrid TMDC-QD devices. Moreover, the custom tailored bandgap of quantum dots provides the photodetector with wide spectral tunability. For photodetection in the spectral window of NIR/SWIR, which is still dominated by expensive and complex epitaxy-based technologies, these hybrid detectors have the potential to favorably compete with commercially available systems. The interface of the TMDC-QD hybrid is of paramount importance for sensitive detector operation. A high density of trap states at the interface is shown to be responsible for inefficient gate-control over channel conductivity, which leads to high dark currents. To maintain the unique electrical field-effect modulation in TMDCs upon deposition of colloidal quantum dots, a passivation route of the interface with semiconducting metal-oxide films is developed. The buffer-layer material is selected such that charge transfer from QDs into the channel is favored. The retained field-effect modulation with a large on/off ratio allows operation of the phototransistor at significantly lower dark currents than non-passivated hybrids. A TMDC-QD phototransistor with an engineered interface that exhibits detectivity of 10^12 - 10^13 Jones and response times of 12 ms and less is reported. In summary, this work showcases prototype photodetectors made of encapsulated 2D TMDCs and TMDC-QD hybrids. Plain TMDC-detectors have potential for application as flexible and semi-transparent detector platforms with high sensitivity in the visible. The hybrid TMDC-QD device increases its spectral selectivity to the NIR/SWIR due to the variable absorption of the sensitizing quantum dots and reaches compelling performance thanks to im-proved light-matter interaction and optimized photocarrier generation.
En la última década ha surgido un gran interés por los materiales bidimensionales (2D) tanto para las tecnologías emergentes de dispositivos flexibles, como para las tecnologías de semiconductores tradicionales. Dentro del creciente catálogo de materiales 2D, los semiconductores basados en dicalcogenuros de metales de transición (DCMTs) han surgido como candidatos para aplicaciones optoelectrónicas. Sus características únicas, tales como grosor atómico, banda prohibida y propiedades electrónicas pueden ser examinadas y aplicadas en nuevas plataformas de fotodetección. En esta tesis se presentan nuevos fototransistores bidimensionales ultrasensibles basados en canales de DCMTs subnanométricos. Se presenta una ruta de encapsulación para intentar solucionar el impacto negativo, e incontrolable hasta la fecha, producido por la adsorción de sustancias atmosféricas que degradan el funcionamiento de los detectores. Este proceso mejora el transporte en los DCMTs dando lugar a una gran ganancia fotoconductora, una respuesta, dependiente de la tensión aplicada en el gate, de 10-10^4 A/W en el visible y una respuesta temporal de tan solo 10 ms, todo ello adecuado para aplicaciones de imagen. El grosor atómico de los dispositivos da lugar a corrientes de oscuridad muy bajas y una detectividad de 10^11-10^12 Jones. Sin embargo, el uso de monocapas de DCMTs presenta ciertas desventajas como por ejem-plo una eficiencia en la absorción baja. Con el fin de mejorar la absorción, los canales de DCMTs se han recubierto con puntos cuánticos (QDs) para fabricar fototransistores híbridos. Esta sinergia combina la alta absorción de los QDs, una eficiente separación de cargas en la interfaz DCMT-QD y un rápido transporte de cargas a través del canal 2D. Todo esto resulta en una ganancia de 10^6 electrones por fotón absorbido y crea la base para sensores de luz extremadamente sensibles. Los puntos cuánticos coloidales son sensibizadores ideales ya que su procesado en disolución y su fácil incorporación sobre cualquier sustrato permiten la fabricación de sistemas híbridos DCMT-QD a bajo coste. Además, la posibilidad de modifi-car la banda prohibida, ofrecida por los QDs, proporciona al fotodetector una amplia respuesta espectral. Para fotodetección en la ventana espectral del infrarrojo cercano (NIR/SWIR), estos detectores híbridos presentan el potencial de competir favorablemente con los sistemas comerciales disponibles. La interfaz entre el híbrido DCMT-QD es de la mayor importancia para la sensibilidad del detector. Se ha demostrado que una alta densidad de trampas en la interfaz es la responsable del ineficiente control mediante el gate de la conductividad del canal, dando lugar a corrientes de oscuridad muy altas. Para mantener la excepcional modulación de efecto campo aún después de la deposición de los QDs, se ha desarrollado una ruta de pasivación de la interfaz con óxidos metálicos semiconductores. El material de esta capa amortiguadora (buffer) es seleccionado de tal manera que permita la transferencia de cargas desde los puntos cuánticos hasta el canal DCMT. Esto retiene la modulación de efecto campo con una relación encendido/apagado muy alta, permitiendo el funcionamiento del fototransistor con corrientes de oscuridad significativamente menores que las de los híbridos sin pasivar. Así, se presenta un fototransistor híbrido DCMT-QD, con una interfaz cuidadosamente diseñada, que exhibe una detectividad de 10^12-10^13 Jones. En resumen, este trabajo presenta unos prototipos de fotodetectores basados en DCMT 2D encapsulados y en híbridos DCMT-QD. Los fotodetectores basados en DCMT simples presentan potencial para su aplicación en detectores flexibles y semitransparentes, con gran sensibilidad en el visible. Los híbridos DCMT-QD amplían la selectividad espectral al infrarrojo cercano gracias a la absorción variable ofrecida por los puntos cuánticos y alcanzan un muy interesante rendimiento gracias a una mejor interacción luz-materia.

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Ren, Lan. "Integrated process planning for a hybrid manufacturing system". Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Ren_09007dcc8046714a.pdf.

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Thesis (Ph. D.)--Missouri University of Science and Technology, 2008.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 18, 2008) Includes bibliographical references.

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KADAM, PRASAD H. "DEVELOPMENT AND COMPARISON OF ANALYTIC, NUMERICAL AND EXPERIMENTAL TECHNIQUES TO FORMULATE FOUR-POLE MATRICES OF THREE-DIMENSIONAL ACOUSTIC SYSTEMS". University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1145669967.

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Ducke, Jacob Steffen [Verfasser], Wilhelm [Akademischer Betreuer] Auwärter, Wilhelm [Gutachter] Auwärter i Friedrich C. [Gutachter] Simmel. "Scanning Probe Microscopy Investigation of Hybrid Nano Systems Comprising Functional Molecules and Two-Dimensional Layers / Jacob Steffen Ducke ; Gutachter: Wilhelm Auwärter, Friedrich C. Simmel ; Betreuer: Wilhelm Auwärter". München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/117332285X/34.

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Srinivasan, Sujatha. "Low-dimensional modeling and analysis of human gait with application to the gait of transtibial prosthesis users". Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1179865923.

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Yu, Lei. "Reconstruction du signal ou de l'état basé sur un espace de mesure de dimension réduite". Thesis, Cergy-Pontoise, 2011. http://www.theses.fr/2011CERG0546/document.

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Le 21_eme siècle est le siècle de l'explosion informatique, des milliards de Données sont produites, collectées et stockées dans notre vie quotidienne. Les façons de collecter les ensembles de données sont multiples mais toujours en essayant d'optimiser le critère qui consiste _a avoir le maximum d'information dans le minimum de données numérique. Il est préférable de collecter directement l'information, car les informations étant contraintes sont dans un espace plus faible que celui où évolues les données (signaux ou états). Cette méthode est donc appelée \la collecte de l'information", et conceptuellement peut ^être résumée dans les trois étapes suivantes : (1) la modélisation, ceci consiste _a condenser l'information pertinente pour les signaux _a un sous-espace plus petit; (2) l'acquisition, ceci consiste _a collecter et préserver l'information dans un espace inferieur _a la dimension des données et (3) la restauration, ceci consiste _a reconstituer l'information dans son espace d'origine. En suivant cette pensée, les principales contributions de cette thèse, concernant les observateurs et le \Compressive Sensing" (CS) basé sur des modèles bay_esiens peuvent ^être unies dans le cadre de la collecte de l'information : les principaux problèmes concernés par ces deux applications peuvent ^être de façon analogue, scindés en les trois étapes sus- mentionnées. Dans la première partie de la th_ese, le problème réside dans le domaine des systèmes dynamiques où l'objectif est de retrouver l'état du système _a partir de la mesure de la sortie. Il nous faut donc déterminer si les états du système sont récupérables _a partir des mesures de la sortie et de la connaissance partielle ou totale du modèle dynamique, c'est le problème de l'observabilité. Ensuite de transposer notre problème dans une représentation plus appropriée, c'est l'écriture sous forme normale et en récupérer l'information, c'est la phase de synthèse d'observateur. Plus précisément dans cette partie, nous avons considéré une classe de systèmes à commutation haute fréquence allant jusqu'au phénomène de Zénon. Pour ces deux types de commutation les transitions de l'état discret sont considérées trop élevées pour ^être mesurées. Toutefois, la valeur moyenne obtenue par filtrage des transitions peut ^être acquise ce qui donne une connaissance partielle des états discrets. Ici, avec ces seuls informations partielles, nous avons discuté de l'observabilité et ceci par les approches géométrie différentielle et algébrique. Aussi, des observateurs ont été proposes par la suite. Dans la deuxième partie de cette thèse, nous avons abordé de la même manière le thème du CS qui est une alternative efficace à l'acquisition abondante de données faiblement informatives pour ensuite les compresser. Le CS se propose de collecter l'information directement de façon compressée, ici les points clés sont la modélisation du signal en fonction des connaissances a priori dont on dispose, ainsi que la construction d'une matrice de mesure satisfaisant la \restricted isometry property" et finalement la restauration des signaux originaux clairsemés en utilisant des algorithmes d'éparpillement régularisé et d'inversion linéaire. Plus précisément, dans cette seconde partie, en considérant les propriétés du CS liées _a la modélisation, la capture et la restauration, il est proposé : (1) d'exploiter les séquences chaotiques pour construire la matrice de mesure qui est appelée la matrice chaotique de mesure, (2) considérer des types de modèle de signal clairsemé et reconstruire le modèle du signal à partir de ces structures sous-jacentes des modèles clairsemés, et (3) proposer trois algorithmes non paramétriques pour la méthode bayesienne hiérarchique. Dans cette dernière partie, des résultats expérimentaux prouvent d'une part que la matrice chaotique de mesure a des propriétés semblables aux matrices aléatoires sous-gaussienne et d'autre part que des informations supplémentaires sur les structures sous-jacentes clairsemés améliorent grandement les performances de reconstruction du signal et sa robustesse vis-a-vis du bruit
This is the era of information-explosion, billions of data are produced, collected and then stored in our daily life. The manners of collecting the data sets are various but always following the criteria { the less data while the more information. Thus the most favorite way is to directly measure the information, which, commonly, resides in a lower dimensional space than its carrier, namely, the data (signals or states). This method is thus called information measuring, and conceptually can be concluded in a framework with the following three steps: (1) modeling, to condense the information relevant to signals to a small subspace; (2) measuring, to preserve the information in lower dimensional measurement space; and (3) restoring, to reconstruct signals from the lower dimensional measurements. From this vein, the main contributions of this thesis, saying observer and model based Bayesian compressive sensing can be well uni_ed in the framework of information measuring: the main concerned problems of both applications can be decomposed into the above three aspects. In the _rst part, the problem is resided in the domain of control systems where the objective of observer design is located in the observability to determine whether the system states are recoverable and observation of the system states from the lower dimensional measurements (commonly but not restrictively). Speci_cally, we considered a class of switched systems with high switching frequency, or even with Zeno phenomenon, where the transitions of the discrete state are too high to be captured. However, the averaged value obtained through filtering the transitions can be easily sensed as the partial knowledge. Consequently, only with this partial knowledge, we discussed the observability respectively from differential geometric approach and algebraic approach and the corresponding observers are designed as well. At the second part, we switched to the topic of compressive sensing which is objected to sampling the sparse signals directly in a compressed manner, where the central fundamentals are resided in signal modeling according to available priors, constructing sensing matrix satisfying the so-called restricted isometry property and restoring the original sparse signals using sparse regularized linear inversion algorithms. Respectively, considering the properties of CS related to modeling, measuring and restoring, we propose to (1) exploit the chaotic sequences to construct the sensing matrix (or measuring operator) which is called chaotic sensing matrix, (2) further consider the sparsity model and then rebuild the signal model to consider structures underlying the sparsity patterns, and (3) propose three non-parametric algorithms through the hierarchical Bayesian method. And the experimental results prove that the chaotic sensing matrix is with the similar property to sub-Gaussian random matrix and the additional consideration on structures underlying sparsity patterns largely improves the performances of reconstruction and robustness

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Nguepedja, Nankep Mac jugal. "Modélisation stochastique de systèmes biologiques multi-échelles et inhomogènes en espace". Thesis, Rennes, École normale supérieure, 2018. http://www.theses.fr/2018ENSR0012/document.

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Les besoins grandissants de prévisions robustes pour des systèmes complexes conduisent à introduire des modèles mathématiques considérant un nombre croissant de paramètres. Au temps s'ajoutent l'espace, l'aléa, les échelles de dynamiques, donnant lieu à des modèles stochastiques multi-échelles avec dépendance spatiale (modèles spatiaux). Cependant, l'explosion du temps de simulation de tels modèles complique leur utilisation. Leur analyse difficile a néanmoins permis, pour les modèles à une échelle, de développer des outils puissants: loi des grands nombres (LGN), théorème central limite (TCL), ..., puis d'en dériver des modèles simplifiés et algorithmes accélérés. Dans le processus de dérivation, des modèles et algorithmes dits hybrides ont vu le jour dans le cas multi-échelle, mais sans analyse rigoureuse préalable, soulevant ainsi la question d'approximation hybride dont la consistance constitue l'une des motivations principales de cette thèse.En 2012, Crudu, Debussche, Muller et Radulescu établissent des critères d'approximation hybride pour des modèles homogènes en espace de réseaux de régulation de gènes. Le but de cette thèse est de compléter leur travail et le généraliser à un cadre spatial.Nous avons développé et simplifié différents modèles, tous des processus de Markov de sauts pures à temps continu. La démarche met en avant, d'une part, des conditions d'approximations déterministes par des solutions d'équations d'évolution (type réaction-advection-diffusion), et, d'autre part, des conditions d'approximations hybrides par des processus stochastiques hybrides. Dans le cadre des réseaux de réactions biochimiques, un TCL est établi. Il correspond à une approximation hybride d'un modèle homogène simplifié à deux échelles de temps (suivant Crudu et al.). Puis, une LGN est obtenue pour un modèle spatial à deux échelles de temps. Ensuite, une approximation hybride est établie pour un modèle spatial à deux échelles de dynamique en temps et en espace. Enfin, des comportements asymptotiques en grandes populations et en temps long sont présentés pour un modèle d'épidémie de choléra, via une LGN suivie d'une borne supérieure pour les sous-ensembles compacts, dans le cadre d'un principe de grande déviation (PGD) correspondant.À l'avenir, il serait intéressant, entre autres, de varier la géométrie spatiale, de généraliser le TCL, de compléter les estimations du PGD, et d'explorer des systèmes complexes issus d'autres domaines
The growing needs of precise predictions for complex systems lead to introducing stronger mathematical models, taking into account an increasing number of parameters added to time: space, stochasticity, scales of dynamics. Combining these parameters gives rise to spatial --or spatially inhomogeneous-- multiscale stochastic models. However, such models are difficult to study and their simulation is extremely time consuming, making their use not easy. Still, their analysis has allowed one to develop powerful tools for one scale models, among which are the law of large numbers (LLN) and the central limit theorem (CLT), and, afterward, to derive simpler models and accelrated algorithms. In that deduction process, the so-called hybrid models and algorithms have arisen in the multiscale case, but without any prior rigorous analysis. The question of hybrid approximation then shows up, and its consistency is a particularly important motivation of this PhD thesis.In 2012, criteria for hybrid approximations of some homogeneous regulation gene network models were established by Crudu, Debussche, Muller and Radulescu. The aim of this PhD thesis is to complete their work and generalize it afterward to a spatial framework.We have developed and simplified different models. They all are time continuous pure jump Markov processes. The approach points out the conditions allowing on the the one hand deterministic approximations by solutions of evolution equations of type reaction-advection-diffusion, and, on the other hand, hybrid approximations by hybrid stochastic processes. In the field of biochemical reaction networks, we establish a CLT. It corresponds to a hybrid approximation of a simplified homogeneous model (due to Crudu et al.). Then a LLN is obtained for a spatial model with two time scales. Afterward, a hybrid approximation is established, for a two time-space scales spatial model. Finally, the asymptotic behaviour in large population and long time are respectively presented for a model of cholera epidemic, through a LLN followed by the upper bound for compact sets, in the context of a corresponding large deviation principle (LDP).Interesting future works would be, among others, to study other spatial geometries, to generalize the CLT, to complete the LDP estimates, and to study complex systems from other fields

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Thota, Phanikrishna. "Analytical and Computational Tools for the Study of Grazing Bifurcations of Periodic Orbits and Invariant Tori". Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/26196.

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The objective of this dissertation is to develop theoretical and computational tools for the study of qualitative changes in the dynamics of systems with discontinuities, also known as nonsmooth or hybrid dynamical systems, under parameter variations. Accordingly, this dissertation is divided into two parts. The analytical section of this dissertation discusses mathematical tools for the analysis of hybrid dynamical systems and their application to a series of model examples. Specifically, qualitative changes in the system dynamics from a nonimpacting to an impacting motion, referred to as grazing bifurcations, are studied in oscillators where the discontinuities are caused by impacts. Here, the study emphasizes the formulation of conditions for the persistence of a steady state motion in the immediate vicinity of periodic and quasiperiodic grazing trajectories in an impacting mechanical system. A local analysis based on the discontinuity-mapping approach is employed to derive a normal-form description of the dynamics near a grazing trajectory. Also, the results obtained using the discontinuity-mapping approach and direct numerical integration are found to be in good agreement. It is found that the instabilities caused by the presence of the square-root singularity in the normal-form description affect the grazing bifurcation scenario differently depending on the relative dimensionality of the state space and the steady state motion at the grazing contact. The computational section presents the structure and applications of a software program, TC-HAT, developed to study the bifurcation analysis of hybrid dynamical systems. Here, we present a general boundary value problem (BVP) approach to locate periodic trajectories corresponding to a hybrid dynamical system under parameter variations. A methodology to compute the eigenvalues of periodic trajectories when using the BVP formulation is illustrated using a model example. Finally, bifurcation analysis of four model hybrid dynamical systems is performed using TC-HAT.
Ph. D.

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Książki na temat "Hybrid dimensional systems"

Cuevas, J. C., D. Roditchev, T. Cren i C. Brun. Proximity Effect A New Insight from In Situ Fabricated Hybrid Nanostructures. Redaktor A. V. Narlikar. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780198738169.013.4.

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This article investigates the proximity effect on small length and energy scales in novel low-dimensional systems using in situ fabricated superconducting nanostructures (SNSs) and scanning tunneling microscopy/spectroscopy (STM/STS) techniques. After a brief historical review of research on superconductivity and the proximity effect, the article describes how to build a variety of in situ superconducting hybrid nanostructures and how to investigate the proximity density of states with the help of STM/STS. It then considers the proximity effect in a correlated 2D disordered metal and in diffusive SNS junctions before discussing proximity Josephson vortices. It also examines the proximity effect between two dissimilar superconductors and concludes by highlighting several fundamental problems related to proximity effect in the framework of quasiclassical microscopic Usadel theory.

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Narlikar, A. V., red. The Oxford Handbook of Small Superconductors. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780198738169.001.0001.

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This handbook examines cutting-edge developments in research and applications of small or mesoscopic superconductors, offering a glimpse of what might emerge as a giga world of nano superconductors. Contributors, who are eminent frontrunners in the field, share their insights on the current status and great promise of small superconductors in the theoretical, experimental, and technological spheres. They discuss the novel and intriguing features and theoretical underpinnings of the phenomenon of mesoscopic superconductivity, the latest fabrication methods and characterization tools, and the opportunities and challenges associated with technological advances. The book is organized into three parts. Part I deals with developments in basic research of small superconductors, including local-scale spectroscopic studies of vortex organization in such materials, Andreev reflection and related studies in low-dimensional superconducting systems, and research on surface and interface superconductivity. Part II covers the materials aspects of small superconductors, including mesoscopic effects in superconductor–ferromagnet hybrids, micromagnetic measurements on electrochemically grown mesoscopic superconductors, and magnetic flux avalanches in superconducting films with mesoscopic artificial patterns. Part III reviews the current progress in the device technology of small superconductors, focusing on superconducting spintronics and devices, barriers in Josephson junctions, hybrid superconducting devices based on quantum wires, superconducting nanodevices, superconducting quantum bits of information, and the use of nanoSQUIDs in the investigation of small magnetic systems.

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Weiss, Meredith L. The Roots of Resilience. Cornell University Press, 2020. http://dx.doi.org/10.7591/cornell/9781501750045.001.0001.

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This book examines governance from the ground up in the world's two most enduring electoral authoritarian or “hybrid” regimes—Singapore and Malaysia—where politically liberal and authoritarian features are blended to evade substantive democracy. Although skewed elections, curbed civil liberties, and a dose of coercion help sustain these regimes, selectively structured state policies and patronage, partisan machines that effectively stand in for local governments, and diligently sustained clientelist relations between politicians and constituents are equally important. While key attributes of these regimes differ, affecting the scope, character, and balance among national parties and policies, local machines, and personalized linkages—and notwithstanding a momentous change of government in Malaysia in 2018—the similarity in the overall patterns in these countries confirms the salience of these dimensions. As the book shows, taken together, these attributes accustom citizens to the system in place, making meaningful change in how electoral mobilization and policymaking happen all the harder to change. This authoritarian acculturation is key to the durability of both regimes, but, given weaker party competition and party–civil society links, is stronger in Singapore than Malaysia. High levels of authoritarian acculturation, amplifying the political payoffs of what parties and politicians actually provide their constituents, explain why electoral turnover alone is insufficient for real regime change in either state.

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Części książek na temat "Hybrid dimensional systems"

Matveev, Alexey S., i Andrey V. Savkin. "Two-Dimensional Hybrid Dynamical Systems". W Qualitative Theory of Hybrid Dynamical Systems, 105–218. Boston, MA: Birkhäuser Boston, 2000. http://dx.doi.org/10.1007/978-1-4612-1364-2_4.

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Thomas, Philip A. "Two-Dimensional Materials". W Narrow Plasmon Resonances in Hybrid Systems, 29–49. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97526-9_3.

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Lahmar, Ines, Aida Zaier, Mohamed Yahia i Ridha Boaullegue. "Fuzzy Kernel Weighted Random Projection Ensemble Clustering For High Dimensional Data". W Hybrid Intelligent Systems, 177–87. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-27409-1_16.

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Oliveira, Óscar, i Dorabela Gamboa. "Adaptive Sequence-Based Heuristic for the Two-Dimensional Non-guillotine Bin Packing Problem". W Hybrid Intelligent Systems, 370–75. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-14347-3_36.

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Chong, A., T. D. Gedeon i K. W. Wong. "Histogram-Based Fuzzy Clustering and Its Comparison to Fuzzy C-Means Clustering in One-Dimensional Data". W Hybrid Information Systems, 253–67. Heidelberg: Physica-Verlag HD, 2002. http://dx.doi.org/10.1007/978-3-7908-1782-9_19.

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Ames, Aaron D., Ryan W. Sinnet i Eric D. B. Wendel. "Three-Dimensional Kneed Bipedal Walking: A Hybrid Geometric Approach". W Hybrid Systems: Computation and Control, 16–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00602-9_2.

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Han, Zhi, i Bruce H. Krogh. "Reachability Analysis of Large-Scale Affine Systems Using Low-Dimensional Polytopes". W Hybrid Systems: Computation and Control, 287–301. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11730637_23.

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Byczkowska-Lipinska, Liliana, i Agnieszka Wosiak. "Hybrid Classification of High-Dimensional Biomedical Tumour Datasets". W Advances in Intelligent Systems and Computing, 287–98. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-23180-8_21.

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Lebedev, Boris K., Oleg B. Lebedev i Ekaterina O. Lebedeva. "Hybrid Bioinspired Algorithm of 1.5 Dimensional Bin-Packing". W Advances in Intelligent Systems and Computing, 254–62. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01818-4_25.

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Wilde, Marc A., Dirk Grundler i Detlef Heitmann. "Magnetization of Interacting Electrons in Low-Dimensional Systems". W Quantum Materials, Lateral Semiconductor Nanostructures, Hybrid Systems and Nanocrystals, 245–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10553-1_10.

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Streszczenia konferencji na temat "Hybrid dimensional systems"

Bogomolov, Sergiy, Marcelo Forets, Goran Frehse, Frédéric Viry, Andreas Podelski i Christian Schilling. "Reach Set Approximation through Decomposition with Low-dimensional Sets and High-dimensional Matrices". W HSCC '18: 21st International Conference on Hybrid Systems: Computation and Control. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3178126.3178128.

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Rodríguez, Juan D., i Jose A. Lozano. "Multi-Objective Learning of Multi-Dimensional Bayesian Classifiers". W 2008 8th International Conference on Hybrid Intelligent Systems (HIS). IEEE, 2008. http://dx.doi.org/10.1109/his.2008.143.

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Dong, Hui, Siwei Yu i Ying Jiang. "A Protégé Plug-In for Modeling Dimensional Ontology". W 2009 Ninth International Conference on Hybrid Intelligent Systems. IEEE, 2009. http://dx.doi.org/10.1109/his.2009.238.

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Fulvio, Forni,. "Global Tracking and State Estimation with Nonsmooth Impacts for a Mass Confined to an N-Dimensional Half-Space". W Analysis and Design of Hybrid Systems, redaktor Heemels, Maurice, chair Giua, Alessandro i Heemels, Maurice. IFAC, Elsevier, 2012. http://dx.doi.org/10.3182/20120606-3-nl-3011.00060.

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Singh, Hemant Kumar, Amitay Isaacs, Tapabrata Ray i Warren Smith. "A Simulated Annealing Algorithm for Single Objective Trans-Dimensional Optimization Problems". W 2008 8th International Conference on Hybrid Intelligent Systems (HIS). IEEE, 2008. http://dx.doi.org/10.1109/his.2008.45.

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Salto, Carolina, Guillermo Leguizamón, Enrique Alba i Juan M. Molina. "Hybrid Ant Colony System to Solve a 2-Dimensional Strip Packing Problem". W 2008 8th International Conference on Hybrid Intelligent Systems (HIS). IEEE, 2008. http://dx.doi.org/10.1109/his.2008.133.

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Kazakovtsev, Lev A. "System for Automatic Grouping of Metadata of Three-Dimensional Models". W International Workshop “Hybrid methods of modeling and optimization in complex systems”. European Publisher, 2023. http://dx.doi.org/10.15405/epct.23021.42.

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Musdholifah, Aina, Siti Zaiton Mohd Hashim i Razali Ngah. "Hybrid PCA-ILGC clustering approach for high dimensional data". W 2012 IEEE International Conference on Systems, Man and Cybernetics - SMC. IEEE, 2012. http://dx.doi.org/10.1109/icsmc.2012.6377760.

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Bo Hu, Guisheng Zhai i A. N. Michel. "Hybrid output feedback stabilization of two-dimensional linear control systems". W Proceedings of 2000 American Control Conference (ACC 2000). IEEE, 2000. http://dx.doi.org/10.1109/acc.2000.879588.

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Youssef, Serena, i Vinod Pangraciousk. "Hybrid Three-Dimensional Thermal Aware Design Methodologies For Multiprocessor Systems". W 2020 12th Annual Undergraduate Research Conference on Applied Computing (URC). IEEE, 2020. http://dx.doi.org/10.1109/urc49805.2020.9099188.

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Raporty organizacyjne na temat "Hybrid dimensional systems"

Kerber, Steve, Daniel Madrzykowski, James Dalton i Robert Backstrom. Improving Fire Safety by Understanding the Fire Performance of Engineered Floor Systems and Providing the Fire Service with Information for Tactical Decision Making. UL Firefighter Safety Research Institute, marzec 2012. http://dx.doi.org/10.54206/102376/zcoq6988.

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This research project was a collaboration of several research organizations, product manufacturers and fire service representatives to examine hazards associated with residential flooring systems to improve firefighter safety. Funding for this project was provided through the National Institute of Standards and Technology’s American Recovery and Reinvestment Act Grant Program. The main objective of this study was to improve firefighter safety by increasing the level of knowledge on the response of residential flooring systems to fire. Several types (or series) of experiments were conducted and analyzed to expand the body of knowledge on the impact of fire on residential flooring systems. The results of the study have been prepared to provide tactical considerations for the fire service to enable improved decision making on the fire scene. Experiments were conducted to examine several types of floor joists including, dimensional lumber, engineered I-joists, metal plate connected wood trusses, steel C-joists, castellated I-joists and hybrid trusses. Experiments were performed at multiple scales to examine single floor system joists in a laboratory up through a full floor system in an acquired structure. Applied load, ventilation, fuel load, span and protection methods were altered to provide important information about the impact of these variables to structural stability and firefighter safety. There are several tactical considerations that result from this research that firefighters can use immediately to improve their understanding, safety and decision making when sizing up a fire in a one or two family home. This report summarizes the results from each of the experimental series and provides discussion and conclusions of the results.

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Nguyen, Binh-Minh. Low Dimensional System Hybrids for Advanced Electronics/Optoelectronics. Office of Scientific and Technical Information (OSTI), lipiec 2013. http://dx.doi.org/10.2172/1088914.

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Burden, Sam, Shai Revzen i S. S. Sastry. Dimension Reduction Near Periodic Orbits of Hybrid Systems: Appendix. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2011. http://dx.doi.org/10.21236/ada559003.

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Hassan, Saeed, AbdulKhaliq Alshadid, Ravinder Saini i Lujain Aldosari. Assessment of Mechanical Properties of Hybrid PVES Elastomeric Material in Comparison to its Parent Materials - A Systemic Review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, marzec 2023. http://dx.doi.org/10.37766/inplasy2023.3.0043.

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Review question / Objective: Does the hybrid elastomeric impression materials have better elastic memory, tensile strength, hydrophilicity, and dimensional stability as compared to polyether and poly vinyl siloxane. Condition being studied: Dimensional Stability, Tear Strength, yield strength, wettability and other properties of impression materials. Information sources: Original studies from corresponding databases were exported using Harzing’s Publish or Perish (Tamra Software Research Ltd) Widows GUI v8.8 edition with MeSH keywords. Data was exported to MS Excel 2021 edition (Microsoft Corporation, Washington USA).

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