Rozprawy doktorskie na temat „Layer by layer optimization”
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Angelou, Marianna. "Cross-layer optimization in optical networks". Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/83925.
Pełny tekst źródłaGifford, James Hart. "Optimization of the automated spray layer-by-layer technique for thin film deposition". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59883.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (p. 82-83).
The operational parameters of the automated Spray-LbL technique for thin film deposition have been investigated in order to-identify their effects on film thickness and roughness. We use the automated Spray-LbL system developed at MIT by the Hammond lab to build 25 bilayer films of poly (ally amine hydrochloride) (PAH) and poly (acrylic acid) (PAA). Each of the 10 operational parameters of this system are explored individually to isolate each parameter's effect on film thickness and roughness. The parameter effects are analyzed for apparent trends to determine the parameters best suited for adjusting film thickness and roughness. The optimal parameters for thickness adjustment are polyelectrolyte solution concentration, polyelectrolyte spray time, spraying distance, air pressure and polyelectrolyte charge density. These parameters are independent of the type of species used to construct the film, and thus the trends should apply to any species used to construct thin films. The effect of each of the 10 operational parameters is examined in detail. While researching the parameter effects, polyelectrolyte interdiffusion in the films was observed. This interdiffusion is investigated using both the conventional dipped LbL and Spray-LbL deposition techniques. Interdiffusion is shown to be dependent on 3 factors, the charge density of the polyelectrolytes, the molecular weight of the polyelectrolytes, and the contact time between the polyelectrolyte solutions and the surface of the film. Interdiffusion is observed when the PAH is partially charged, the polyelectrolytes chains have a low molecular weight, and the contact time is sufficiently long enough to allow for interdiffusion. The significantly reduced contact time during the automated Spray-LbL process not only speeds up the film deposition time, but also significantly hinders the interdiffusion of PAH resulting in much thinner films than what is possible from dipping. Finally, the uniformity of the films produced using the automated Spray-LbL system is investigated. Films deposited on substrates greater than 1 in diameter area exhibit more than 20% variance in thickness. Adjustments were made to the setup of the system in an effort to expand this area of film thickness uniformity. However, it is determined that the design of this automated Spray-LbL system limits the film uniformity to an area of 1 in diameter.
by James Hart Gifford.
S.M.
Warren, Christopher L. (Christopher Lane). "Submarine design optimization using boundary layer control". Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10529.
Pełny tekst źródłaIncludes bibliographical references (leaves 64-67).
by Christopher L. Warren.
M.S.
Nav.E.
Chu, Zheng. "Transmit optimization techniques for physical layer security". Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3377.
Pełny tekst źródłaMiao, Guowang. "Cross-layer optimization for spectral and energy efficiency". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31807.
Pełny tekst źródłaCommittee Chair: Li, Geoffrey Ye; Committee Member: Ma, Xiaoli; Committee Member: Stuber, Gordon; Committee Member: Wardi, Yorai; Committee Member: Yu, Xingxing. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Hägg, Ragnar. "Scalable High Efficiency Video Coding : Cross-layer optimization". Thesis, Uppsala universitet, Avdelningen för visuell information och interaktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257558.
Pełny tekst źródłaSoldati, Pablo. "Cross-layer optimization of wireless multi-hop networks". Licentiate thesis, Stockholm Stockholm : Elektrotekniska system, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4463.
Pełny tekst źródłaLoretti, Simone. "Cross-layer Optimization of CDMA Multihop Radio Networks". Thesis, KTH, Reglerteknik, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109471.
Pełny tekst źródłaLin, Yuxia. "Cross-layer optimization in wireless local area networks". Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/7571.
Pełny tekst źródłaDubroca, Sabrina Marjorie. "Cross-Layer optimization in a satellite communication network". Thesis, KTH, Radio Systems Laboratory (RS Lab), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-127401.
Pełny tekst źródłaDetta projekt har försökt förbättra ett datornätverk bestående av satelliter som används till både data och Voice over IP (VoIP) kommunikation. VoIP använder sig av resursreservation som bestäms av standardprotokollen för Traffic Engineering, MPLS-TE och RSVP-TE. Målet är att optimera antalet samtidiga VoIP samtal så att det mesta av den befintliga bandbredden kan utnyttjas samtidigt som Quality of Service (QoS) kan garanteras. Detta är omöjligt i det befintliga systemet. Projektet föreslår en lösning för problemet med modemet som utvecklas av Thales Communications och utvärderar därefter lösningen. Dessa optimeringar förbättrar systemets förmåga att driva VoIP kommunikationer genom att bättre använda de befintliga resurserna. En lösning för det här problemet skulle höja systemets flexibilitet och kunna användas som underlag för kommande utvecklingar. Tack vare lösningen kan hela utsedda bandbredden reserveras. Antalet bandbredd som kan reserveras måsta vara minst lite lågre än total befintling bandbredd för att undvika överbelastning. även några möjliga ideer för vidare undersökning föreslås.
Ce projet a pour but d'améliorer un réseau de communication par satellite utilisé pour transporter des flux de données ainsi que des sessions de communication Voix sur IP (VoIP) avec réservation de ressources. Les réservations sont prises en charge par les protocoles standard de Traffic Engineering que sont MPLS-TE et RSVP-TE. L'objectif de ce projet est d'optimiser le nombre d'appels VoIP pouvant être passés en parallèle afin d'utiliser autant de bande passante que possible tout en offrant un niveau de Qualité de Service (QoS) garanti, chose impossible dans le système actuel. Ce rapport propose et évalue une solution à ce problème d'optimisation dans le contexte spécifique du modem satellite développé par Thales Communications. Ces optimisations amélioreraient la capacité du système à transporter des communications VoIP grâce à une meilleure utilisation des ressources disponibles pour la transmission. Une solution à ce problème rendrait aussi l'allocation de ressources plus flexible au sein du système, et pourrait fournir une base à de futurs développements. La solution proposée permet l'utilisation de toute la bande passante réservable. La quantité réservable doit être un peu inférieure à la bande passante totale disponible afin d'éviter la congestion. Les résultats de ces évaluations sont exposés. Enfin, ce rapport propose de futurs développements possibles.
Mahajan, Rahul. "Cross-Layer Optimization: System Design and Simulation Methodologies". Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/35920.
Pełny tekst źródłaMaster of Science
Mandal, Pritesh. "Design and Optimization of Boundary Layer Ingesting Propulsor". University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573812115023373.
Pełny tekst źródłaYin, Hujun. "Cross layer design and optimization of wireless networks /". Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/5904.
Pełny tekst źródłaSohrmann, Christoph, i Jens Eller. "Optimal Layer Design". Bachelor's thesis, Universitätsbibliothek Chemnitz, 2004. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200401468.
Pełny tekst źródłaDiese Bachelorarbeit befasst sich mit numerischen Untersuchungen zum optimalen Design von schützenden Mehrschichtbeschichtungen, die einer externen, Hertzschen Last ausgesetzt sind. Hinsichtlich der mechanischen Zuverlässigkeit und Haltbarkeit von Substrat und Beschichtung, versuchen wir die beste Zusammensetzung von gegebenen Materialien mit möglichst geringem Rechenaufwand zu finden. Die numerischen Berechungen wurden mit der Simulationssoftware ELASTICA durchgeführt, welches das erste kommerzielle, nicht-FEM-basierte Programm zur Berechnung von Stressfeldern innerhalb mehrfach beschichteter, elastischer Materialien darstellt. Dafür benutzten wir auf dem massiven Parrallelrechner CLiC (Chemnitzer Linux Cluster) unsere Windows basierte Anwendung unter der Emulationssoftware Wine. Das Ergebnis der Optimierung hängt im allgemeinen sehr stark von der Qualität der Eingangsparameter (z.B. Materialeigenschaften) ab, welche nicht immer in der erwünschten Genauigkeit vorliegen. Es wird gezeigt, dass die in dieser Arbeit vorgestellte Vorgehensweise sehr gute Resultate liefert und für reale Anwendungen einen äusserst ressourcenschonenden Lösungsweg darstellt
Tambwe, Kevin. "P- and e- type Semiconductor layers optimization for efficient perovskite photovoltaics". University of Western Cape, 2019. http://hdl.handle.net/11394/7414.
Pełny tekst źródłaPerovskite solar cells have attracted a tremendous amount of research interest in the scientific community recently, owing to their remarkable performance reaching up to 22% power conversion efficiency (PCE) in merely 6 to 7 years of development. Numerous advantages such as reduced price of raw materials, ease of fabrication and so on, have contributed to their increased popularity.
Al-Ajmi, Mohammed. "Homogenization and topology optimization of constrained layer damping treatments". College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1537.
Pełny tekst źródłaThesis research directed by: Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Lim, Tat Lee. "Cross-layer design and optimization for wireless sensor networks". Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FLim.pdf.
Pełny tekst źródłaThesis Advisor(s): Weilian Su. "March 2006." Includes bibliographical references (p. 61-64). Also available in print.
CICALO', Sergio. "Cross-layer Optimization for Video Delivery over Wireless Networks". Doctoral thesis, Università degli studi di Ferrara, 2014. http://hdl.handle.net/11392/2388943.
Pełny tekst źródłaBelleschi, Marco. "Cross-layer optimization protocols in Ad-hoc networks: analysis and practical implementation of transport and network layers". Thesis, KTH, Reglerteknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105891.
Pełny tekst źródłaPedrola, Escribà Oscar. "Cross-layer modeling and optimization of next-generation internet networks". Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/113601.
Pełny tekst źródłaRuiz, Ramírez Marc. "Characterization, design and re-optimization on multi-layer optical networks". Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/97163.
Pełny tekst źródłaThe explosion of IP traffic due to the increase of IP-based multimedia services such as HDTV or video conferencing poses new challenges to network operators to provide a cost-effective data transmission. Although Dense Wavelength Division Multiplexing (DWDM) meshed transport networks support high-speed optical connections, these networks lack the flexibility to support sub-wavelength traffic leading to poor bandwidth usage. To cope with the transport of that huge and heterogeneous amount of traffic, multilayer networks represent the most accepted architectural solution. Multilayer optical networks allow optimizing network capacity by means of packing several low-speed traffic streams into higher-speed optical connections (lightpaths). During this operation, a dynamic virtual topology is created and modified the whole time thanks to a control plane responsible for the establishment, maintenance, and release of connections. Because of this dynamicity, a suboptimal allocation of resources may exist at any time. In this context, a periodically resource reallocation could be deployed in the network, thus improving network resource utilization. This thesis is devoted to the characterization, planning, and re-optimization of next-generation multilayer networks from an integral perspective including physical layer, optical layer, virtual layer, and control plane optimization. To this aim, statistical models, mathematical programming models and meta-heuristics are developed. More specifically, this main objective has been attained by developing five goals covering different open issues. First, we provide a statistical methodology to improve the computation of the Q-factor for impairment-aware routing and wavelength assignment problems (IA-RWA). To this aim we propose two statistical models to compute the Cross-Phase Modulation variance (which represents the bottleneck in terms of computation time and complexity) in off-line and on-line IA-RWA problems, proving the accuracy of both models when computing Q-factor values in real traffic scenarios. Second and moving to the optical layer, we present a new wavelength partitioning scheme that allows maximizing the amount of extra traffic provided in shared path protected environments compared with current solutions. Specifically, we define several statistical models to estimate the traffic intensity given a target grade of service, and different network planning problems for maximizing the expected revenues and net present value. After solving these problems for real networks, we conclude that our proposed scheme maximizes both revenues and NPV. Third, we tackle the design of survivable multilayer networks against single failures at the IP/MPLS layer and WSON links. To efficiently solve this problem, we propose a new approach based on over-dimensioning IP/MPLS devices and lightpath connectivity and recovery and we compare it against the conventional solution based on duplicating backbone IP/MPLS nodes. After evaluating both approaches by means of ILP models and heuristic algorithms, we conclude that our proposed approach leads to significant CAPEX savings. Fourth, we introduce an adaptive mechanism to reduce the usage of opto-electronic (O/E) ports of IP/MPLS-over-WSON multilayer networks in dynamic scenarios. A ILP formulation and several heuristics are developed to solve this problem, which allows significantly reducing the usage of O/E ports in very short running times. Finally, we address the design of resilient control plane topologies in GMPLS-enabled transport networks. After proposing a novel analytical model to quantify the resilience in mesh control plane topologies, we use this model to propose a problem to design the control plane topology. An iterative model and a heuristic are proposed and used to solve real instances, concluding that a significant reduction in the number of control plane links can be performed without affecting the quality of service of the network.
Chen, Jack Szu-Shen. "Distortion-free tolerance-based layer setup optimization for layered manufacturing". Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/27268.
Pełny tekst źródłaShojaeifard, Arman. "Cross-layer design and optimization of heterogeneous cellular mobile networks". Thesis, King's College London (University of London), 2013. https://kclpure.kcl.ac.uk/portal/en/theses/crosslayer-design-and-optimization-of-heterogeneous-cellular-mobile-networks(dfe31556-d8f0-4fdc-a9e3-8f01fed258ed).html.
Pełny tekst źródłaChen, Yen-Lin. "Cross-layer design and optimization for wireless networked control systems". Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/61089/1/Yen-Lin_Chen_Thesis.pdf.
Pełny tekst źródłaXiong, Haozhi. "Delay-Aware Cross-Layer Design in Multi-hop Networks". The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1290107298.
Pełny tekst źródłaNgo, Minh Hanh. "Cross-layer adaptive transmission scheduling in wireless networks". Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/432.
Pełny tekst źródłaMerlin, Simone. "Cross-layer design in wireless networks". Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3426273.
Pełny tekst źródłaBuburuzan, Teodor [Verfasser]. "Optimization of an Interface Abstraction Layer for Heterogeneous Networks / Teodor Buburuzan". Aachen : Shaker, 2011. http://d-nb.info/1071528947/34.
Pełny tekst źródłaDely, Peter. "Cross-Layer Optimization of Voice over IP in Wireless Mesh Networks". Licentiate thesis, Karlstads universitet, Avdelningen för datavetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-6280.
Pełny tekst źródłaSehlstedt, Martin. "Physical layer optimization for transportation of scalable media over AWGN channels /". Luleå, 2005. http://epubl.luth.se/1402-1544/2005/27.
Pełny tekst źródłaNoordin, Kamarul Ariffin. "Cross-layer optimization of WiMAX system with quality of service guarantee". Thesis, Lancaster University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551638.
Pełny tekst źródłaWinslow, Michael A. "OPTIMIZATION OF ELECTROMAGNETIC WAVE PROPAGATION THROUGH A HETEROGENEOUS LIQUID CRYSTAL LAYER". Monterey, California. Naval Postgraduate School, 2013. http://hdl.handle.net/10945/32919.
Pełny tekst źródłaChen, Si. "Cross-Layer Optimization and Dynamic Spectrum Access for Distributed Wireless Networks". Digital WPI, 2009. https://digitalcommons.wpi.edu/etd-theses/1067.
Pełny tekst źródłaGwanvoma, Stephen B. "Systems Approach to Cross-Layer Optimization of a Complex Wireless Environment". International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595765.
Pełny tekst źródłaThis paper presents a method for the optimization of mixed networks that incorporates a mixed layer optimization of performance features. The expanded integrated Network Enhanced Telemetry (iNET) system envisioned telemetering for large and complex networks which will require core telemetry networks with ad hoc extensions for coverage. Organizing such a network has been successfully accomplished in simulations using a K-mean clustering algorithm. This paper shows how the features of these network elements will be captured and disseminated in a real system. This management of network elements across multiple layers is characterized as cross-layer optimization. This paper will also show how such cross layer features can be combined for a globally optimum solution. It shows by example how the iNET system comprising multiple ground stations, gateways, frequency, nodes, and three performance measures can be optimized to achieve overall optimal system performance.
Saki, Hadi. "Cross-layer design and optimization of OFDMA-based cognitive radio networks". Thesis, King's College London (University of London), 2014. http://kclpure.kcl.ac.uk/portal/en/theses/crosslayer-design-and-optimization-of-ofdmabased-cognitive-radio-networks(448efa7d-9d55-423c-adb3-8a5ae8cd51f8).html.
Pełny tekst źródłaKassab, Mohamed. "Layer-2 hancover optimization for intra-technologies and inter-technologies mobility". Télécom Bretagne, 2008. http://www.theses.fr/2008TELB0098.
Pełny tekst źródłaRahman, Tasnim. "Optimization of Cross-Layer Network Data based on Multimedia Application Requirements". Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-theses/1348.
Pełny tekst źródłaHernandez, Herrero Sandra. "Cross-layer optimization for visual-inertial localization on resource-constrained devices". Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296834.
Pełny tekst źródłaMobila enheter med begränsade resurser, som drönare och rovers, förväntas stödja mer och mer krävande cyberfysiska applikationer. Glappet mellan enheternas begränsningar i hårdvara och applikationskrav är dock fortfarande stort - motstridiga mål som robust, noggrann och effektiv körning måste uppfyllas för att uppnå acceptabel drift. Detta examensarbete undersöker avvägningen mellan prestanda och effektivitet i cyberfysiska system, särskilt med avseende på lokalisering som är en av de viktigaste uppgifterna för alla mobila autonoma enheter. Vi gör en design space exploration (DSE) genom att variera ett antal parametrar för både lokaliseringsalgoritm och plattformslager. Baserat på konfigurationsrummet formulerar vi ett tvärlageroptimeringsproblem med flera mål för att utforska avvägningen mellan noggrannhet i lokaliseringen och energiåtgång. I våra experiment kör vi maplab – ett visuellt tröghetsramverk för lokalisering och kartläggning – på Nvidia Jetson AGXoch NX-plattformarna. Vi presenterar sedan en robust prediktiv modell som kan användas för att välja konfigurationer vid körning i en föränderlig miljö.
Zhou, Yi. "Physical Layer Security and Latency Optimization for Internet of Things Communications". Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23553.
Pełny tekst źródłaYadav, Anita [Verfasser]. "Cross Layer Optimization for Protocols in Mobile Adhoc Networks / Anita Yadav". München : GRIN Verlag, 2020. http://d-nb.info/1206641002/34.
Pełny tekst źródłaOskooi, Ardavan F. "An investigation of the perfectly matched layer for inhomogeneous media". Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43738.
Pełny tekst źródłaThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 41-45).
Although perfectly matched layers (PMLs) have been widely used to truncate numerical simulations of electromagnetism and other wave equations, we point out important cases in which a PML fails to be reflectionless even in the limit of infinite resolution. In particular, the underlying coordinate-stretching idea behind PML breaks down in photonic crystals and in other structures where the material is not an analytic function in the direction perpendicular to the boundary, leading to substantial reflections. The alternative is an adiabatic absorber, in which reflections are made negligible by gradually increasing the material absorption at the boundaries, similar to a common strategy to combat discretization reflections in PMLs. We demonstrate the fundamental connection between such reflections and the smoothness of the absorption profile via coupled-mode theory, and show how to obtain higher-order and even exponential vanishing of the reflection with absorber thickness.
by Ardavan F. Oskooi.
S.M.
Zarakovitis, Charilaos C. "Convex optimization-based resource scheduling for multi-user wireless systems". Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/11068.
Pełny tekst źródłaShi, Yi. "Algorithms and Optimization for Wireless Networks". Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/29480.
Pełny tekst źródłaPh. D.
YODER, DENNIS ALLEN. "ALGEBRAIC REYNOLDS STRESS MODELING OF PLANAR MIXING LAYER FLOWS". University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1115637717.
Pełny tekst źródłaDufresne, Sophie. "Optimization of an airfoil's performance through moving boundary control". Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09292009-020211/.
Pełny tekst źródłaLiu, Weigang. "Enhancing physical layer security in wireless networks with cooperative approaches". Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/19565.
Pełny tekst źródłaKim, Sung Hyun. "Multi-layer approach to motion planning in obstacle rich environment". [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2621.
Pełny tekst źródłaKartsakli, Elli. "Cross-layer design and optimization of medium access control protocols for wlans". Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/81116.
Pełny tekst źródłaKong, Lei. "Performance analysis and optimization for MAC-layer IEEE 802.16e power saving mechanism /". View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?ECED%202007%20KONG.
Pełny tekst źródłaErpek, Tugba. "Multi-layer Optimization Aspects of Deep Learning and MIMO-based Communication Systems". Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/102705.
Pełny tekst źródłaDoctor of Philosophy