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Dissertations / Theses on the topic 'Chenův systém'

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Published: 28 June 2021
Last updated: 1 February 2022

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1

Šustková, Apolena. "Řešení obyčejných diferenciálních rovnic neceločíselného řádu metodou Adomianova rozkladu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-445455.

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This master's thesis deals with solving fractional-order ordinary differential equations by the Adomian decomposition method. A part of the work is therefore devoted to the theory of equations containing differential operators of non-integer order, especially the Caputo operator. The next part is devoted to the Adomian decomposition method itself, its properties and implementation in the case of Chen system. The work also deals with bifurcation analysis of this system, both for integer and non-integer case. One of the objectives is to clarify the discrepancy in the literature concerning the fractional-order Chen system, where experiments based on the use of the Adomian decomposition method give different results for certain input parameters compared with numerical methods. The clarification of this discrepancy is based on recent theoretical knowledge in the field of fractional-order differential equations and their systems. The conclusions are supported by numerical experiments, own code implementing the Adomian decomposition method on the Chen system was used.
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Cheng, Long [Verfasser], Alois [Akademischer Betreuer] Knoll, Kai [Gutachter] Huang, and Alois [Gutachter] Knoll. "System Level Periodic Thermal Management for Hard Real-Time Systems / Long Cheng ; Gutachter: Kai Huang, Alois Knoll ; Betreuer: Alois Knoll." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1151638587/34.

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3

Bontrager, Austin. "Estimation of agricultural soil erosion and surface water quality trends in the Cheney Lake watershed." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/13182.

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Master of Science
Department of Agronomy
Nathan Nelson
Phosphorus and sediment runoff are the primary cause of eutrophication in Cheney Lake, the primary water source for Wichita, Kansas. Best Management Practices (BMPs) such as no-till farming practices and nutrient management can be implemented to reduce phosphorus runoff on high-risk agricultural fields. Past efforts have established BMP use in this watershed, although the effectiveness of these efforts has not been evaluated. The goals of this project were to identify any existing water quality trends in the Cheney Lake watershed, estimate the current distribution of erosion in the watershed, and evaluate the placement of BMPs with regards to field-scale erosion risk. Parametric, multi-linear regression and non-parametric, seasonal Mann-Kendall analyses were used to identify trends in the Total Suspended Solids (TSS) and Total Phosphorus (TP) of grab samples from the North Fork Ninnescah River. A Geographic Information System (GIS) model based on the Revised Universal Soil Loss Equation (RUSLE) was used to estimate watershed-scale erosion, prioritize agricultural land for BMP placement, and evaluate existing placement of BMPs within the Cheney Lake watershed. No detectible trends were identified in the water quality data due to stream variability, frequency of sampling, or absence of actual improvement in water quality. Additional sampling must be done to detect any trends in the future. BMPs were implemented on 13% of prioritized field area, and 11% of non-prioritized field area. Conservation Reserve Program (CRP) fields were placed on 14% of prioritized field area, and 5% of non-prioritized field area. No-till practices were implemented on 13% of prioritized field area, and 18% of non-prioritized field area. The top 20% eroding fields were identified given current conditions, and account for approximately 56% of the watershed-wide erosion. The GIS method has demonstrated utility in evaluating past erosion control measures for the watershed and in informing future decisions concerning BMP placement.
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Cheng, YunChien [Verfasser], Edgar [Akademischer Betreuer] Doersam, and Katja [Akademischer Betreuer] Schmitz. "CMOS-Chip Based Printing System for Combinatorial Synthesis / YunChien Cheng. Betreuer: Edgar Doersam ; Katja Schmitz." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2012. http://d-nb.info/1106117476/34.

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Cheng, Yun-Chien [Verfasser], Edgar [Akademischer Betreuer] Doersam, and Katja [Akademischer Betreuer] Schmitz. "CMOS-Chip Based Printing System for Combinatorial Synthesis / YunChien Cheng. Betreuer: Edgar Doersam ; Katja Schmitz." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2012. http://nbn-resolving.de/urn:nbn:de:tuda-tuprints-30861.

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Si, Tou Wai Meng. "An Investigation of the dynamic behaviors of the chaotics Chen-Lee system." Thesis, University of Macau, 2007. http://umaclib3.umac.mo/record=b1694327.

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Jäger, Wadim [Verfasser], Antonio [Akademischer Betreuer] Hurtado, and Xu [Akademischer Betreuer] Cheng. "Validation and Application of the System Code TRACE for Safety Related Investigations of Innovative Nuclear Energy Systems / Wadim Jäger. Gutachter: Antonio Hurtado ; Xu Cheng. Betreuer: Antonio Hurtado." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://d-nb.info/1067732640/34.

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Huang, Xi [Verfasser], and X. [Akademischer Betreuer] Cheng. "Study on Water Film Cooling for PWR's Passive Containment Cooling System / Xi Huang. Betreuer: X. Cheng." Karlsruhe : KIT-Bibliothek, 2015. http://d-nb.info/1077821875/34.

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Molter, Christian [Verfasser], and Po Wen [Akademischer Betreuer] Cheng. "Development of a flying wind measurement system for collective operation / Christian Molter ; Betreuer: Po Wen Cheng." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2020. http://d-nb.info/1220692840/34.

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Wang, Xi [Verfasser], and X. [Akademischer Betreuer] Cheng. "Multiscale thermal hydraulic analysis of fuel assembly and system of SFR / Xi Wang ; Betreuer: X. Cheng." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1187343269/34.

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11

Chen, Lei. "Answering why-not questions on spatial keyword top-k queries /Chen Lei." HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/365.

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With the continued proliferation of location-based services, a growing number of web-accessible data objects are geo-tagged and have text descriptions. Spatial keyword top-k queries retrieve k such objects with the best score according to a ranking function that takes into account a query location and query keywords. However, it is in some cases difficult for users to specify appropriate query parameters. After a user issues an initial query and gets back the result, the user may find that some expected objects are missing and may wonder why. Answering the resulting why-not questions can aid users in retrieving better results and thus improve the overall utility of the query functionality. While spatial keyword querying has been studied intensively, no proposals exist for how to offer users explanations of why such expected objects are missing from results. In this dissertation, we take the first step to study the why-not questions on spatial keyword top-k queries. We provide techniques that allow different revisions of spatial keyword queries such that their results include one or more desired, but missing objects. Detailed problem analysis and extensive experimental studies consistently demonstrate the effectiveness and robustness of our proposed techniques in a broad range of settings.
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Sonntag, Martin [Verfasser], and X. [Akademischer Betreuer] Cheng. "Subcooled Two-Phase Flow Heat Transfer in Multiscale Systems / Martin Sonntag ; Betreuer: X. Cheng." Karlsruhe : KIT-Bibliothek, 2017. http://d-nb.info/1137264926/34.

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Chen, Mengdi [Verfasser]. "Assembly of multinary colloidal systems in a centrifugal field / Mengdi Chen." Konstanz : Bibliothek der Universität Konstanz, 2017. http://d-nb.info/1132511356/34.

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Chen, Lingling [Verfasser]. "Heat Transfer Enhancement in Impingement Systems with Surface Enlargements / Lingling Chen." München : Verlag Dr. Hut, 2017. http://d-nb.info/1137023996/34.

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Rongier, Guillaume. "Connectivity of channelized sedimentary bodies : analysis and simulation strategies in subsurface modeling." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0026/document.

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Les chenaux sont des structures sédimentaires clefs dans le transport et le dépôt de sédiments depuis les continents jusqu'aux planchers océaniques. Leurs dépôts perméables permettent la circulation et le stockage de fluides. Comme illustré avec les systèmes turbiditiques, le remplissage de ces chenaux est très hétérogène. Son impact sur la connectivité des dépôts perméables est amplifié par les variations d'organisation spatiale des chenaux. Mais du fait de l'aspect lacunaire des données, l'architecture de ces structures souterraines n'est que partiellement connue. Dans ce cas, les simulations stochastiques permettent d'estimer les ressources et les incertitudes associées. De nombreuses méthodes ont été développées pour reproduire ces environnements. Elles soulèvent deux questions capitales : comment analyser et comparer la connectivité de simulations stochastiques ? Comment améliorer la représentation de la connectivité dans les simulations stochastiques de chenaux et réduire les incertitudes ? La première question nous a conduits à développer une méthode pour comparer objectivement des réalisations en se concentrant sur la connectivité. L'approche proposée s'appuie sur les composantes connexes des simulations, sur lesquelles sont calculés plusieurs indicateurs. Une représentation par positionnement multidimensionnel (MDS) facilite la comparaison des réalisations. Les observations faites grâce au MDS sont ensuite validées par une carte de chaleur et les indicateurs. L'application à un cas synthétique de complexes chenaux/levées montre les différences de connectivité entre des méthodes et des valeurs de paramètres différentes. En particulier, certaines méthodes sont loin de reproduire des objets avec une forme de chenaux. La seconde question amène deux principaux problèmes. Premièrement, il apparaît difficile de conditionner des objets très allongés, comme des chenaux, à des données de puits ou dérivées de données sismiques. Nous nous appuyons sur une grammaire formelle, le système de Lindenmayer, pour simuler stochastiquement des objets chenaux conditionnés. Des règles de croissance prédéfinies contrôlent la morphologie du chenal, de rectiligne à sinueuse. Cette morphologie conditionne les données au fur et à mesure de son développement grâce à des contraintes attractives ou répulsives. Ces contraintes assurent le conditionnement tout en préservant au mieux la morphologie. Deuxièmement, l'organisation spatiale des chenaux apparaît peu contrôlable. Nous proposons de traiter ce problème en intégrant les processus qui déterminent l'organisation des chenaux. Un premier chenal est simulé avec un système de Lindenmayer. Puis ce chenal migre à l'aide d'une simulation gaussienne séquentielle ou d'une simulation multipoints. Cette approche reproduit les relations complexes entre des chenaux successifs sans s'appuyer sur des modèles physiques partiellement validés et au paramétrage souvent contraignant. L'application de ces travaux à des cas synthétiques démontre le potentiel de ces approches. Elles ouvrent des perspectives intéressantes pour mieux prendre en compte la connectivité dans les simulations stochastiques de chenaux
Channels are the main sedimentary structures for sediment transportation and deposition from the continents to the ocean floor. The significant permeability of their deposits enables fluid circulation and storage. As illustrated with turbiditic systems, those channel fill is highly heterogeneous. Combined with the spatial organization of the channels, this impacts significantly the connectivity between the permeable deposits. The scarcity of the field data involves an incomplete knowledge of these subsurface reservoir architectures. In such environments, stochastic simulations are used to estimate the resources and give an insight on the associated uncertainties. Several methods have been developed to reproduce these complex environments. They raise two main concerns: how to analyze and compare the connectivity of a set of stochastic simulations? How to improve the representation of the connectivity within stochastic simulations of channels and reduce the uncertainties? The first concern leads to the development of a method to objectively compare realiza-tions in terms of connectivity. The proposed approach relies on the connected compo-nents of the simulations, on which several indicators are computed. A muldimensional scaling (MDS) representation facilitates the realization comparison. The observations on the MDS are then validated by the analysis of the heatmap and the indicators. The appli-cation to a synthetic case study highlights the difference of connectivity between several methods and parameter values to model channel/levee complexes. In particular, some methods are far from representing channel-shaped bodies. Two main issues derive from the second concern. The first issue is the difficulty to simulate a highly elongated object, here a channel, conditioned to well or seismic-derived data. We rely on a formal grammar, the Lindenmayer system, to stochastically simulate conditional channel objects. Predefined growth rules control the channel morphology to simulate straight to sinuous channels. That morphology conditions the data during its development thanks to attractive and repulsive constraints. Such constraints ensure the conditioning while preserving at best the channel morphology. The second issue arises from the limited control on the channel organization. This aspect is addressed by taking into account the evolution processes underlying channel organization. An initial channel is simulated with a Lindenmayer system. Then that channel migrates using sequential Gaussian simulation or multiple-point simulation. This process reproduces the complex relationships between successive channels without relying on partially validated physical models with an often constraining parameterization. The applications of those various works to synthetic cases highlight the potentiality of the approaches. They open up interesting prospects to better take into account the connectivity when stochastically simulating channels
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Chen, Si [Verfasser], and Ana [Akademischer Betreuer] Martin-Villalba. "The CD95/CD95L signaling system in developmental and tumor angiogenesis of the central nervous system / Si Chen ; Betreuer: Ana Martin-Villalba." Heidelberg : Universitätsbibliothek Heidelberg, 2018. http://d-nb.info/1177688484/34.

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Chen, Zhao [Verfasser], and N. [Akademischer Betreuer] Goldscheider. "Modeling a geologically complex karst aquifer system, Hochifen-Gottesacker, Alps / Zhao Chen ; Betreuer: N. Goldscheider." Karlsruhe : KIT-Bibliothek, 2017. http://d-nb.info/1136660852/34.

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Freier, Matthias [Verfasser], and J. J. [Akademischer Betreuer] Chen. "Analysis of Real-Time Capabilities of Dynamic Scheduled System / Matthias Freier. Betreuer: J.-J. Chen." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/1113109300/34.

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Chen, Yun [Verfasser]. "Automatic Modulation Classification in Mobile OFDM Systems with Adaptive Modulation / Yun Chen." Aachen : Shaker, 2014. http://d-nb.info/1049380568/34.

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Li, Cheng [Verfasser], Rafig [Akademischer Betreuer] Azzam, and Herbert [Akademischer Betreuer] Klapperich. "Multi-sensor data fusion for geohazards early warning system – an adapted process model / Cheng Li ; Rafig Azzam, Herbert Klapperich." Aachen : Universitätsbibliothek der RWTH Aachen, 2015. http://d-nb.info/1130326284/34.

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Li, Cheng [Verfasser], and Rodrigo [Akademischer Betreuer] Rodrigues. "Building fast and consistent (geo-)replicated systems : from principles to practice / Cheng Li. Betreuer: Rodrigo Rodrigues." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2016. http://d-nb.info/1109790171/34.

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Guo, Cheng [Verfasser], and Jan von [Akademischer Betreuer] Delft. "Using density matrix renormalization group to study open quantum systems / Cheng Guo. Betreuer: Jan von Delft." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1029662819/34.

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Wu, Cheng. "Study of translational control using cell-free translation systems and primer extension inhibition assays / Cheng Wu." Full text open access at:, 2008. http://content.ohsu.edu/u?/etd,624.

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Chen, Chen [Verfasser], Alois [Akademischer Betreuer] Knoll, Heinz-Erich [Akademischer Betreuer] Wichmann, and Alexander [Akademischer Betreuer] Horsch. "A multimodal biosensor-based system with compatibility for telemonitoring and epidemiological services / Chen Chen. Betreuer: Alois Knoll. Gutachter: Alois Knoll ; Heinz-Erich Wichmann ; Alexander Horsch." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1097547566/34.

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Chen, Yuling Verfasser], and Thomas [Akademischer Betreuer] [Jungbluth. "Biomethane production in an innovative two-phase pressurized anaerobic digestion system / Yuling Chen. Betreuer: Thomas Jungbluth." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2015. http://d-nb.info/1070580546/34.

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Yin, Qitao [Verfasser], and Li [Akademischer Betreuer] Chen. "Mean field limit of many particle system with non-Lipschitz force / Qitao Yin ; Betreuer: Li Chen." Mannheim : Universitätsbibliothek Mannheim, 2019. http://d-nb.info/1192664019/34.

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Chen, Yu-Chun [Verfasser], and Eberhard [Akademischer Betreuer] Goering. "XMCD investigations on new hard magnetic systems / Yu-Chun Chen ; Betreuer: Eberhard Goering." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2018. http://d-nb.info/1185487468/34.

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Parrot, Elsa. "Analyse spatio-temporelle de la morphologie du chenal du Rhône du Léman à la Méditerranée." Thesis, Lyon 3, 2015. http://www.theses.fr/2015LYO30054/document.

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Cette thèse étudie l’organisation longitudinale du lit du Rhône français et son évolution depuis plus d’un siècle afin d’améliorer la gestion des sédiments du fleuve. Elle décrit d’abord la complexité géographique, géologique, et hydrologique des 512 km du système fluvial. Les extractions, l’endiguement, la chenalisation et les aménagements hydroélectriques ont simplifié le tracé latéral du chenal, incisé et pavé le fond du lit et appauvri les habitats aquatiques et riverains. La thèse caractérise ensuite plus précisément les dynamiques de fond. Elle repose sur des données bathymétriques de 1897-2010 et sur des données granulométriques issues de plus de 300 prélèvements réalisés dans le cadre de ces travaux sur l’ensemble du linéaire. Un protocole d’échantillonnage homogène a été spécialement élaboré. Les variations altimétriques du lit (zones de stockage-érosion et faciès morphologiques) et sa composition granulométrique (zones pavées ou comblées par des fines) ont été caractérisées afin d’évaluer la mobilité potentielle de la charge de fond, les apports des affluents et l’impact des ouvrages sur les conditions de transport. Il ressort 1) que l’incision du lit est principalement due à la chenalisation, 2) que les aménagements hydroélectriques ont compartimenté le continuum en provoquant le stockage de sédiments fins dans certaines retenues et en favorisant le pavage dans les vieux Rhône à l’aval de Lyon et 3) qu’une dynamique résiduelle subsiste lors de crues majeures avec une remobilisation modérée de la charge de fond. Les données des secteurs les plus pavés ont été intégrées dans un modèle hydraulique 1D permettant de quantifier la capacité de transport et le débit solide et confirmant les résultats précédents. Ces travaux permettent de formuler des recommandations de gestion durable et de restauration écologique du fleuve telles que l’ouverture des vannes de fond en crue, la modification des consignes aux barrages ou la réinjection de graviers
This thesis studies the French Rhone riverbed longitudinal organisation and its evolution over a century, with a view to improve the management strategy for the sediments. It first describes the geographic, geologic and hydrologic peculiarities of the 512-km long fluvial system. Gravel mining, dikes construction, channelization and dams construction have simplified the lateral pattern of the channel, incised and paved the riverbed and impoverished the aquatic and riparian habitats. The thesis then more precisely characterizes the riverbed dynamics. It relies on bathymetric data collected since 1897 and on grainsize data collected specifically for this study from over 300 samples on the whole 512-km river length. An homogeneous sampling protocol was elaborated on purpose. The vertical bed evolution and grainsize distribution were analysed to assess the riverbed potential mobility, tributaries’ sediment recharge and infrastructures’ impact on sediment transport. It thus appears that 1) riverbed incision is mainly due to channelization, 2) hydroelectric dams partitioned the continuum with the accumulation of fine sediments in some backwaters and the pavement of bypassed reaches downstream of Lyon and 3) a residual dynamic persists during major floods, with moderate gravels transport. The data of paved reaches were used in a 1D hydraulic model to quantify transport capacity and bedload discharge, confirming the aforementioned results. This study helps formulate such recommendations for sustainable river management and ecological restoration as opening slush gates during floods, changing dams management instructions or reinjecting gravel
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Ehrlich, Stefan K. [Verfasser], Gordon [Akademischer Betreuer] Cheng, Cuntai [Gutachter] Guan, and Gordon [Gutachter] Cheng. "Error-related potentials in passive brain-computer interfaces for quantitative assessment and adaptation of robotic systems during human-robot interaction / Stefan K. Ehrlich ; Gutachter: Cuntai Guan, Gordon Cheng ; Betreuer: Gordon Cheng." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1217783806/34.

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Alt, Nicolas [Verfasser], Eckehard [Akademischer Betreuer] [Gutachter] Steinbach, and Gordon [Gutachter] Cheng. "Visuo-haptic environment perception for autonomous robotic systems / Nicolas Alt ; Gutachter: Eckehard Steinbach, Gordon Cheng ; Betreuer: Eckehard Steinbach." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1121206700/34.

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Chen, Yongbo [Verfasser]. "Objektorientierte Modellierung mechatronischer Systeme mit Hilfe von Übertragungselementen unter Berücksichtigung von Unstetigkeiten / Yongbo Chen." Aachen : Shaker, 2011. http://d-nb.info/1075437865/34.

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Cheng, Chih-Hong [Verfasser], Alois [Akademischer Betreuer] Knoll, and Estaun Francisco Javier [Akademischer Betreuer] Esparza. "An implementation for algorithmic game solving and its applications in system synthesis / Chih-Hong Cheng. Gutachter: Francisco Javier Esparza Estaun. Betreuer: Alois Knoll." München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/1022683837/34.

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Chen, Ming [Verfasser], Alfred [Akademischer Betreuer] Fahr, and Gerrit L. [Akademischer Betreuer] Scherphof. "Skin Drug Delivery From Different Lipid Vesicular Systems / Ming Chen. Gutachter: Alfred Fahr ; Gerrit L. Scherphof." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2011. http://d-nb.info/1017078890/34.

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Chen, Xin Verfasser], Erika [Akademischer Betreuer] [Ábrahám, and Sriram [Akademischer Betreuer] Sankaranarayanan. "Reachability analysis of non-linear hybrid systems using Taylor Models / Xin Chen ; Erika Ábrahám, Sriram Sankaranarayanan." Aachen : Universitätsbibliothek der RWTH Aachen, 2015. http://d-nb.info/1181107857/34.

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Chen, Xiao-Ming [Verfasser]. "Trellis-Based Joint Data/Channel Estimation for Differentially Encoded SISO and MIMO Systems / Xiao-Ming Chen." Aachen : Shaker, 2005. http://d-nb.info/1181606543/34.

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Chen, Kan [Verfasser], Dirk [Akademischer Betreuer] Müller, and Antonello [Akademischer Betreuer] Monti. "Active thermal management for residential air source heat pump systems / Kan Chen ; Dirk Müller, Antonello Monti." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1157016030/34.

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Chen, Zhimiao Verfasser], Stefan [Akademischer Betreuer] [Heinen, and Gerd [Akademischer Betreuer] Ascheid. "SystemC based Behavioral Modeling and Virtual Prototyping of RF SoCs / Zhimiao Chen ; Stefan Heinen, Gerd Ascheid." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1161808965/34.

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Chen, Zhimiao [Verfasser], Stefan [Akademischer Betreuer] Heinen, and Gerd [Akademischer Betreuer] Ascheid. "SystemC based Behavioral Modeling and Virtual Prototyping of RF SoCs / Zhimiao Chen ; Stefan Heinen, Gerd Ascheid." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1161808965/34.

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Chen, Hans [Verfasser], and M. [Akademischer Betreuer] Heilmaier. "Gefüge und Eigenschaften von äquiatomaren Legierungen aus dem System Ta-Nb-Mo-Cr-Ti-Al / Hans Chen ; Betreuer: M. Heilmaier." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/1208296787/34.

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Chen, Tao [Verfasser], and Stefan van [Akademischer Betreuer] Waasen. "Model-driven development methodology applied to real-time MEG signal pre-processing system design / Tao Chen ; Betreuer: Stefan van Waasen." Duisburg, 2019. http://d-nb.info/1191692027/34.

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Low, Cheng Yee [Verfasser]. "A method to manage the transition from the principle solution towards the controller design of advanced mechatronic systems / Cheng Yee Low." Paderborn : Universitätsbibliothek Paderborn, 2009. http://d-nb.info/101807824X/34.

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Cheng, Yao [Verfasser], Martin [Akademischer Betreuer] Haardt, Ruyet Didier [Gutachter] Le, and Ana Isabel [Gutachter] Pérez-Neira. "Advanced multi-dimensional signal processing for wireless systems / Yao Cheng ; Gutachter: Didier Le Ruyet, Ana Isabel Pérez-Neira ; Betreuer: Martin Haardt." Ilmenau : TU Ilmenau, 2016. http://d-nb.info/1178170934/34.

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43

Chen, Yi-Ju. "A novel quantification of the relationship between blood sugar and stress / Y.J. Chen." Thesis, North-West University, 2008. http://hdl.handle.net/10394/2633.

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Chen, Yejian [Verfasser]. "Data Transmission in Wideband Code Division Multiple Access (WDMA/FDD) Systems with Multiple Transmit Antennas / Yejian Chen." Aachen : Shaker, 2007. http://d-nb.info/1166510980/34.

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45

Teshome, Tewodros Meless. "Computational fluid dynamics application to optimize and evaluate the performance of high rate algal pond system." Thesis, Strasbourg, 2020. http://www.theses.fr/2020STRAD002.

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Le chenal à haut rendement algal (CHRA) est l'un des moyens les plus appropriés pour la production de biomasse algale. Cette étude s'intéresse à l'effet de l'hydrodynamique d'un CHRA à l'échelle pilote afin d’y optimiser le mélange. La mécanique des fluides numérique a fait ses preuves en offrant la possibilité de comprendre et d'optimiser des paramètres hydrodynamiques complexes qui sont généralement considérés comme des facteurs décisifs du degré de mélange. Dans cette étude, deux approches alternatives de modélisation CFD, les méthodes vitesse d’entrée et maillage dynamique, sont utilisées pour simuler l'hydrodynamique du bassin. Les données de champs vitesse et de traçage expérimentales sont utilisées pour valider et comparer les performances de ces approches. Les profils de vitesse horizontaux sur la profondeur à trois positions présentent une meilleure concordance avec les valeurs expérimentales avec la méthode maillage dynamique que la méthode vitesse d’entrée. D'autre part, avec la diffusion turbulente incluse dans la méthode vitesse d’entrée, on constate une bonne concordance entre les valeurs simulées et expérimentales du traceur dans un temps de simulation beaucoup plus court qu’avec l'approche du maillage dynamique. Le temps de calcul pour le maillage dynamique est extrêmement long sans qu'il y ait un avantage équivalent dans le résultat de la simulation du traceur par rapport à la méthode de la vitesse d'entrée, dans cette configuration particulière du modèle. Pour améliorer la prédiction de la vitesse à partir de la méthode de la vitesse d'entrée, le profil de vitesse expérimental de la mesure ADV a été appliqué sur la condition aux limites d’entrée du modèle. Une modification simple a également été apportée à la géométrie du bassin pour démontrer l'effet du déflecteur sur les conditions de mélange et la consommation d'énergie. La mise en place de déflecteurs pourrait rendre la distribution des vitesses uniforme, ce qui minimiserait la consommation d'énergie et réduirait les zones mortes
In a well-mixed condition, High Rate Algal Pond (HRAP) is one of the most appropriate ways for algal biomass production. This study is interested in the effect of the hydrodynamics inside a lab-scale HRAP that plays an important role to realize proper mixing. Computational Fluid Dynamics has proven itself to offer the possibilities of understanding and optimizing complex hydrodynamic parameters that are commonly considered as decisive factors to the degree of mixing. In this study, two alternative CFD modeling approaches, Inlet Velocity and Dynamic Mesh methods, are used to simulate the pond hydrodynamics. Measured velocity and tracer data are used to validate and compare the performance of these approaches. Horizontal velocity profiles across the depth of flow at three locations display higher agreement with the experimental values in the Dynamic Mesh method than the Inlet Velocity method. On the other hand, with turbulence diffusion included in the Inlet velocity method, good agreement is found between simulated and experimental tracer values in fairly short simulation time than in the Dynamic Mesh approach. The computational time for Dynamic Mesh is extremely exaggerated without an equivalent advantage in the tracer simulation result over the Inlet Velocity method in this particular model setup. To enhance the velocity prediction from Inlet Velocity method, velocity profile from ADV measurement has been applied on the inlet patch of the model and better fitting curves are observed in this case. Simple modification has also been made on the geometry of the pond to demonstrate the effect of the flow deflector on mixing condition and power consumption. The provision of deflectors could make the velocity distribution uniform thereby minimizing power consumption and reducing the dead zones
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Chen, Yi-Jen [Verfasser], and Robin [Akademischer Betreuer] Santra. "Light-induced ultrafast tunneling dynamics of a many-electron system : from weak to strong fields / Yi-Jen Chen ; Betreuer: Robin Santra." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1193177995/34.

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47

Huber, Klaus [Verfasser], and X. [Akademischer Betreuer] Cheng. "A multiscale method for mixed convective systems - Coupled calculations with ATHLET and OpenFOAM of the PHENIX NCT / Klaus Huber ; Betreuer: X. Cheng." Karlsruhe : KIT-Bibliothek, 2017. http://d-nb.info/1136021779/34.

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48

Brocheray, Sandra. "Transferts et accumulations sur les marges du Golfe de Gascogne : architecture, fonctionnement et contrôles." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0079/document.

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Ce travail présente une analyse de la morphologie et de la dynamique sédimentaire des systèmes turbiditiques actuels du Cap-Ferret et de Capbreton (sud du Golfe de Gascogne). La reconnaissance effectuée sur le système de Capbreton est la première à le considérer dans son ensemble. Ce travail se base sur des données acoustiques de subsurface (sondeur multifaisceaux, sondeur de sédiments Chirp) et de carottages issues de la campagne océanographique Sargass menée par l’Université de Bordeaux. L’analyse morpho-bathymétrique révèle l’organisation amont-aval des géométries sédimentaires dans ces systèmes et, couplée aux données sédimentaires, de préciser les processus de dépôts liés aux écoulements gravitaires. Le fonctionnement holocène du canyon de Capbreton montre des processus gravitaires haute fréquence, révélant son rôle de dépôt-centre pour le sud du golfe de Gascogne. Dans le système du Cap-Ferret, la zone de transition chenal-lobe a été investiguée à fine échelle, documentant ainsi des structures sédimentaires rarement identifiées avec ce niveau de détails dans les systèmes turbiditiques modernes. La dynamique sédimentaire de chacun de ces systèmes est soumise à des forçages auto-cycliques et glacio-eustatiques qui affectent chacun des systèmes de façons différentes. Ces informations ont permis de proposer un modèle régional de fonctionnement sédimentaire au cours des derniers 50 000 ans
This work presents an analysis of the morphology and sedimentary dynamic of the Cap-Ferret and Capbreton turbidite systems (south Bay of Biscay), containing the first recognition of the whole Capbreton turbidite system. The dataset comprises subsurface geophysical data (multibeam bathymetric and imagery, Chirp sub-bottom profiler) and piston cores, acquired during the oceanographic cruise Sargass conducted by the Bordeaux University. Studied by morpho-bathymetric analyses, the upstream-downstream evolution of the sedimentary bodies joined to the sedimentological data help to understand the active gravity processes of the systems. In the Capbreton system, a special focus is made on its Holocene gravity deposits occurring at high frequencies. In the Cap-Ferret system, the channel-lobe transition zone has been investigated at high resolution and revealed sedimentary structures poorly documented at this scale of details in recent turbidite systems. The glacio-eustatic and autocyclic forcing are expressed in different ways in each turbidite sytem. A regional sedimentary dynamic model is proposed for the last 50,000 years
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Chen, Yun [Verfasser], Andreas [Akademischer Betreuer] Czylwik, and Robert [Akademischer Betreuer] Fischer. "Automatic Modulation Classification in Mobile OFDM Systems with Adaptive Modulation / Yun Chen. Gutachter: Robert Fischer. Betreuer: Andreas Czylwik." Duisburg, 2013. http://d-nb.info/1042899630/34.

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Chen, Xiaomin [Verfasser], and Ashwin [Akademischer Betreuer] Gumaste. "Performance Analysis of Parallel Transmission and Multipath Routing in High-Speed Network Systems / Xiaomin Chen ; Betreuer: Ashwin Gumaste." Braunschweig : Technische Universität Braunschweig, 2014. http://d-nb.info/117582075X/34.

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