Дисертації з теми "Phase selector"
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Muhammad, Nuraddeen Ado. "Analysis and design of an innovative 19.5 GHz active phase-shifter architecture, implemented in a 0.13 μm BiCMOS SiGe process, for beamforming in 5G applications". Electronic Thesis or Diss., Poitiers, 2024. http://www.theses.fr/2024POIT2257.
For good reasons, 5G dominates technological news. The high-bandwidth and real-time capabilities of 5G have huge societal potential by enabling a plethora of new and unanticipated application cases. Indeed, the millimeter-wave frequency band is characterized by an available bandwidth that can support high-speed wireless systems for future radio communications systems, including 5th Generation cellular systems and beyond. The frequencies of operation at mm-wave generally requires larger antenna aperture to improve the channel budget at useful distances. These antennas are usually in the form of phased arrays, allowing beamforming to be performed. This work presents the design and implementation of a 19.5 GHz active phase shifter for beamforming in 5G applications. The proposed circuit is based on an original architecture using an injection-locked voltage-controlled oscillator (ILVCO) associated with a polyphase filter followed by a phase selection circuit and its sign. The desired phase in the range of ± 45° is synthesised with the proposed circuit by altering the control voltage Vcntr of an ILVCO for fine-tuning and modifying the two control signals of phase and sign selectors (S0, S2) for coarse tuning, resulting in a 360° linear phase variation. According to the post-layout simulation results, the frequency tuning range of the VCO varies from 17.89 GHz to 20.16 GHz in free-running mode. In addition, with an injected power of -8.5 dBm and a frequency of 19.5 GHz, the proposed phase shifter draws 20.47 mA from a 1.3 V supply voltage. Furthermore, the mean output power on 50 Ω load is found to be -15.58 dBm. The whole circuit has a chip size of 1.58 mm2 including the pads and it is integrated in a BiCMOS SiGe:C 0.13 μm process. Finally, the obtained results justify that the proposed active phase shifter is a relevant design for phased-array systems used for beamforming in 5G applications
Gasquez, Julien. "Conception de véhicules de tests pour l’étude de mémoires non-volatiles émergentes embarquées." Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0419.
Phase change memory (PCM) is part of the strategy to develop non-volatiles memories embedded in advanced technology nodes (sub 28nm). Indeed, Flash-NOR memory is becoming more and more expensive to integrate in technologies with high permittivity dielectrics and metallic gates. The main objective of this thesis is therefore to realize tests vehicles in order to study an innovative PCM + OTS memory point and to propose solutions to fill its gaps and limitations according to the envisaged applications. The study is based on two different technologies: HCMOS9A and P28FDSOI. The first one is used as support for the development of a technological validation vehicle of the OTS+PCM memory point. The second one is used to demonstrate the surface obtained with an aggressive sizing of the memory point. Finally, an optimized readout circuit for this memory point has been realized allowing the compensation of leakage currents as well as the regulation of the bias voltages of the matrix during the reading
Hiles, James F. "Multi-phase source selection strategy analysis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA386722.
"December 2000." Thesis advisor(s): Jeffrey Cuskey, Keith Snider. Includes bibliographical references (p. 111-114). Also available online.
Colarusso, Pina. "Selected projects in gas-phase spectroscopy." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq22196.pdf.
Spalek, Leszek Jedrzej. "Emergent phenomena near selected phase transitions." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608135.
Meredith, Michael William. "Intermetallic phase selection in dilute aluminium alloys." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624389.
Hara, Kousuke. "Mechanism of Phase Selection during Mechanical Milling." Kyoto University, 2011. http://hdl.handle.net/2433/142019.
Yeago, Taylor Craig. "A Two-Phase Buck Converter with Optimum Phase Selection for Low Power Applications." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51230.
Master of Science
Sha, Gang. "Intermetallic phase selection in 6xxx series A1 alloys." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393371.
Allen, C. M. "Nucleation studies in aluminium alloys." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388896.
Jones, Martin Stuart. "Phase selection on EHV transmission lines using travelling-waves." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243342.
Maggs, Steven James. "Intermetallic phase selection in dilute Al-Fe-Si alloys." Thesis, University of Leeds, 1996. http://etheses.whiterose.ac.uk/4711/.
Lwin, Kay Thi. "Structures, Thermodynamics and Phase Relations in Selected Oxide Systems." Thesis, Indian Institute of Science, 2004. https://etd.iisc.ac.in/handle/2005/3910.
Lwin, Kay Thi. "Structures, Thermodynamics and Phase Relations in Selected Oxide Systems." Thesis, Indian Institute of Science, 2004. http://hdl.handle.net/2005/52.
Thomas, David Paul Foley Joe Preston. "Efficiency enhancements in micellar liquid chromatography through selection of stationary phase and mobile phase organic modifier /." Philadelphia, Pa. : Drexel University, 2009. http://hdl.handle.net/1860/3039.
Abdela, Ahmed. "Gas phase generation and deposition of size-selected metal clusters." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4955/.
Ko, Shyue-woei. "Phase Analysis of Selected High Temperature Superconductors During Hydrogen Reduction /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487930304685103.
Aouni, Jihane. "Utility-based optimization of phase II / phase III clinical development." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS032/document.
The main development of the thesis was devoted to the problem of dose choice optimization in dose-finding trials, in phase II. We have considered this problem from the perspective of utility functions. We have allocated a utility value to the doses itself, knowing that the sponsor’s problem was now to find the best dose, that is to say, the one having the highest utility. We have limited ourselves to a single utility function, integrating two components: an efficacy-related component (the PoS = the power of a phase III trial - with 1000 patients - of this dose versus placebo) and a safety-related component. For the latter, we chose to characterize it by the predictive probability of observing a toxicity rate lower or equal to a given threshold (that we set to 0.15) in phase III (still for a trial of 1000 patients in total). This approach has the advantage of being similar to the concepts used in phase I trials in Oncology, which particularly aim to find the dose related to a limiting toxicity (notion of "Dose limiting Toxicity").We have adopted a Bayesian approach for the analysis of phase II data. Apart from the known theoretical advantages of the Bayesian approach compared with the frequentist approach (respect of the likelihood principle, less dependency on asymptotic results, robustness), we chose this approach for several reasons:• It provides a more flexible framework for the decision-making of the sponsor because it offers the possibility to combine (by definition of the Bayesian approach) a priori information with the available data: in particular, it offers the possibility to integrate, more or less explicitly, the information available outside the phase II trial.• The Bayesian approach allows greater flexibility in the formalization of the decision rules.We studied the properties of decision rules by simulating phase II trials of different sizes: 250, 500 and 1000 patients. For the last two designs (500 and 1000 patients in phase II), we have also evaluated the interest of performing an interim analysis when half of the patients are enrolled (i.e. with the first 250and the first 500 patients included respectively). The purpose was then to evaluate whether or not, for larger phase II trials, allowing the possibility of choosing the dose in the middle of the study and continuing the study to the end if the interim analysis is not conclusive, could reduce the size of the phase II trial while preserving the relevance of the final dose choice
Wickramanayake, Priyanga, and s3028858@student rmit edu au. "Applications of chiral selectors and replaceable supports for capillary electrophoretic separations." RMIT University. Applied Chemistry, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080617.115607.
Christiansen, Thomas Wulstan. "Coreference and noun phrase selection in Italian." Thesis, University of Salford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365982.
Meyer, Scott C. "Non-Covalent Selection Methodologies Utilizing Phage Display." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/194059.
Allen, James. "Using phylogenetics and model selection to investigate the evolution of RNA genes in genomic alignments." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/using-phylogenetics-and-model-selection-to-investigate-the-evolution-of-rna-genes-in-genomic-alignments(3bd15b02-d375-40e9-b04a-c3befb8cc691).html.
Forthomme, Damien. "High Resolution Laser Spectroscopy Of Selected Molecules In The Gas Phase." Thesis, Fredericton: University of New Brunswick, 2011. http://hdl.handle.net/1882/35387.
Loveless, Ian. "Binary Classification With First Phase Feature Selection forGene Expression Survival Data." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555444873531262.
Trilisky, Egor. "Stationary and mobile phase selection for ion-exchange chromatography of viruses." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 266 p, 2009. http://proquest.umi.com/pqdweb?did=1674096451&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Jabbour, Rabih Elie. "Characterization of selected immobilized metal-ions using solid phase extraction sorbents." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282773.
Sutherland, Gregory J. "Characterization of Order-Disorder Phase Transition Temperature for Select Nanoparticles." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5592.
Ndaoud, Mohamed. "Contributions to variable selection, clustering and statistical estimation inhigh dimension." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLG005/document.
This PhD thesis deals with the following statistical problems: Variable selection in high-Dimensional Linear Regression, Clustering in the Gaussian Mixture Model, Some effects of adaptivity under sparsity and Simulation of Gaussian processes.Under the sparsity assumption, variable selection corresponds to recovering the "small" set of significant variables. We study non-asymptotic properties of this problem in the high-dimensional linear regression. Moreover, we recover optimal necessary and sufficient conditions for variable selection in this model. We also study some effects of adaptation under sparsity. Namely, in the sparse vector model, we investigate, the changes in the estimation rates of some of the model parameters when the noise level or its nominal law are unknown.Clustering is a non-supervised machine learning task aiming to group observations that are close to each other in some sense. We study the problem of community detection in the Gaussian Mixture Model with two components, and characterize precisely the sharp separation between clusters in order to recover exactly the clusters. We also provide a fast polynomial time procedure achieving optimal recovery.Gaussian processes are extremely useful in practice, when it comes to model price fluctuations for instance. Nevertheless, their simulation is not easy in general. We propose and study a new rate-optimal series expansion to simulate a large class of Gaussian processes
Lazzaroni, Michael John. "Optimizing solvent selection for separation and reaction." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-07092004-124758/unrestricted/lazzaroni%5Fmichael%5Fj%5F200407%5Fphd.pdf.
Charles L. Liotta, Committee Co-Chair ; Charles A. Eckert, Committee Chair ; Amyn S. Teja, Committee Member ; J. Carson Meredith, Committee Member ; Rigoberto Hernandez, Committee Member. Vita. Includes bibliographical references.
Cote, Marie. "Solubility and phase behaviour of selected pharmaceutical excipients in 2h, 3h-perfluoropentane." Thesis, Cardiff University, 2008. http://orca.cf.ac.uk/54770/.
Bell, Martin T. "Cold chemistry in the gas phase using velocity selection and molecular deceleration." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543053.
FOURTUNE, LAURENT. "Selection de nombre d'onde et diffusion de phase dans l'instabilite de l'imprimeur." Paris 6, 1994. http://www.theses.fr/1994PA066730.
Palacios, Patricia [Verfasser], and Stephan [Akademischer Betreuer] Hartmann. "Phase transitions in science: selected philosophical topics / Patricia Palacios ; Betreuer: Stephan Hartmann." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/1206878304/34.
Shi, Rongpei. "Variant Selection during Alpha Precipitation in Titanium Alloys- A Simulation Study." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397655766.
Wilson, Daniel Ross. "Multivalent pIII phage display libraries, selected issues and applications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25187.pdf.
St-Pierre, François Ph D. Massachusetts Institute of Technology. "Determination of cell fate selection during phage lambda Infection." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/85701.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages. 109-121).
Bacteriophage lambda infection of Escherichia coli can result in distinct cell fate outcomes: for example, some cells lyse while others survive as lysogens. A quantitative molecular model of lambda infection supports the hypothesis that spontaneous differences in the timing of individual molecular events during lambda infection leads to variation in the selection of cell fates. Building from this analysis, the lambda lysis-lysogeny decision now serves as a paradigm for how intrinsic biomolecular noise can influence cellular behavior, drive developmental processes, and produce population heterogeneity. The aim of this thesis is to re-evaluate lambda as a paradigm for stochastic behavior by determining whether and to what extent variation in cell fate selection results from pre-existing cell-cell differences rather than chance events during infection. I find that physical differences among cells present prior to infection can control lambda developmental outcomes. Specifically, variation in cell volume at the time of infection can be used to predict cell fate: small cells tend to produce lysogens while larger cells favor lytic growth. I then present evidence that the apparent sensitivity to host volume is encoded by components of the lambda regulatory network acting upstream or at the level of CII, a critical regulator of the lambda lysis-lysogeny decision. I also detail the construction and evaluation of new strains, tools and methodology to size-fractionate populations of cells, to detect lambda infection and gene expression at the single cell level, and to enumerate individual phage particles. My results motivate further research to understand how and to what extent natural biological systems tolerate, buffer or correct for spontaneous molecular variation during development in order to produce deterministic behavior.
by François St-Pierre.
Ph. D.
Gadzekpo, Isaac Kwabena. "Selection of Phage Displaying Peptides Specific for Staphylococcus Aureus." Youngstown State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1619516455248529.
GUARAN, Valeria. "NANOTECHNOLOGIES AND PHAGE DISPLAY: SELECTION OF PEPTIDES MIMICKING BDNF." Doctoral thesis, Università degli studi di Ferrara, 2009. http://hdl.handle.net/11392/2389198.
Boulos, Victoria Marie. "The Gas-Phase Ligand Exchange of Select Metal Bis-diisopropylacetylacetonate Complexes." Youngstown State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1503671099629922.
Nilsson, Rebecka, and Tilda Nithenius. "Selection of Local and Expatriate Managers of MNEs in the Post-Entry Phase." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-31128.
Bond, Nicole. "Inorganic Phase Characterization, Corrosion Modelling and Refractory Selection for Direct Contact Steam Generation." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/41951.
Romero, Ospina Javier Ernesto. "Texture evolution during beta-quenching of a zirconium alloy." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/texture-evolution-during-betaquenching-of-a-zirconium-alloy(bc5fc24d-f5dd-4074-b2ae-a7cf1a8bae7e).html.
Persic, Lidija. "The selection of specific phage antibodies from phage antibody libraries and their expression in different systems." Thesis, Open University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299004.
Levkin, Pavel. "Practice and theory of gas chromatographic enantioseparation on single- and binary-selector chiral stationary phases." [S.l. : s.n.], 2007.
Brock, Jeffrey Adams. "AN EXPERIMENTAL STUDY OF MAGNETIC AND STRUCTURAL PHASE TRANSITIONS AND ASSOCIATED PHENOMENA IN SELECTED NI-MN-DERIVATIVE HEUSLER ALLOYS." Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1500906786979139.
Howe, Harriet. "The effect of solid solution on the stabilities of selected hydrous phases during subduction." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/the-effect-of-solid-solution-on-the-stabilities-of-selected-hydrous-phases-during-subduction(c1c440aa-e51c-49e3-beda-558bd2b1cc4a).html.
Gebretsadik, Adane Samuel Gebretsadik. "INTERPLAY BETWEEN CHEMICAL AND MAGNETIC DISORDER IN SELECTED ALLOYS CLOSE TO A FERROMAGNETIC QUANTUM PHASE TRANSITION." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1527609152939816.
Ndaoud, Mohamed. "Contributions to variable selection, clustering and statistical estimation inhigh dimension." Electronic Thesis or Diss., Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLG005.
This PhD thesis deals with the following statistical problems: Variable selection in high-Dimensional Linear Regression, Clustering in the Gaussian Mixture Model, Some effects of adaptivity under sparsity and Simulation of Gaussian processes.Under the sparsity assumption, variable selection corresponds to recovering the "small" set of significant variables. We study non-asymptotic properties of this problem in the high-dimensional linear regression. Moreover, we recover optimal necessary and sufficient conditions for variable selection in this model. We also study some effects of adaptation under sparsity. Namely, in the sparse vector model, we investigate, the changes in the estimation rates of some of the model parameters when the noise level or its nominal law are unknown.Clustering is a non-supervised machine learning task aiming to group observations that are close to each other in some sense. We study the problem of community detection in the Gaussian Mixture Model with two components, and characterize precisely the sharp separation between clusters in order to recover exactly the clusters. We also provide a fast polynomial time procedure achieving optimal recovery.Gaussian processes are extremely useful in practice, when it comes to model price fluctuations for instance. Nevertheless, their simulation is not easy in general. We propose and study a new rate-optimal series expansion to simulate a large class of Gaussian processes
Davidson, Ian. "The effect of grain refiners on intermetallic phase selection in 6XXX series Al alloys." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432560.
Kimani, Peter Kung'u. "Dose selection in seamless phase II/III clinical trials based on efficacy and toxicity." Thesis, University of Warwick, 2009. http://wrap.warwick.ac.uk/2765/.