Blar i Publikasjoner fra CRIStin - NTNU på tittel

Viser treff 23833-23852 av 38289

    • Nonlinear Observers for Integrated INS/GNSS Navigation – Implementation Aspects 

      Bryne, Torleiv Håland; Hansen, Jakob Mahler; Rogne, Robert Harald; Sokolova, Nadezda; Johansen, Tor Arne; Fossen, Thor I. (Journal article, 2017)
      Navigation is a term with broad usage in everyday life and can mean the act of moving, moving through an unknown environment, ascertaining a craft's position, or even browsing on the Internet. Originally, the term meant ...

    • Nonlinear optical microscopy of early stage (ICRS Grade-I) osteoarthritic human cartilage 

      Kumar, Rajesh; Grønhaug, Kirsten Marie; Davies, Catharina De Lange; Drogset, Jon Olav; Lilledahl, Magnus Borstad (Journal article; Peer reviewed, 2015)

    • Nonlinear optical properties of polycrystalline silicon core fibers from telecom wavelengths into the mid-infrared spectral region 

      Ren, Haonan; Shen, Li; Wu, D; Aktas, Ozan; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2019)
      Polycrystalline silicon core fibers (SCFs) fabricated via the molten core drawing (MCD) method are emerging as a flexible optoelectronic platform. Here, the optical transmission properties of MCD SCFs that have been tapered ...

    • Nonlinear optical response and structural properties of MBE-grown Fe:ZnS films 

      Polyakov, Stanislav; Karhu, Eric Andrew; Zamiri, Reza; Moisset, Charles; Iliopoulos, Konstantinos; Vullum, Per Erik; Österberg, Ulf; Gibson, Ursula (Journal article; Peer reviewed, 2018)
      Fe-doped ZnS films of high optical quality were fabricated using vacuum vapor deposition. Preferential crystalline orientation and phase purity of the host ZnS films were increased by the addition of small amounts of Fe, ...

    • Nonlinear Preisach maps: Detecting and characterizing separate remanent magnetic fractions in complex natural samples 

      Church, Nathan Stewart; Fabian, Karl; McEnroe, Suzanne (Peer reviewed; Journal article, 2016)
      Natural remanent magnetization carriers in rocks can contain mixtures of magnetic minerals that interact in complex ways and are challenging to characterize by current measurement techniques. Here a nonlinear mapping scheme ...

    • Nonlinear Propagation of mid-IR Femtosecond Pulses in ZBLAN Fiber 

      Tolstik, Nikolai; Sorokin, Evgeni; Kalashnikov, Vladimir; Sorokina, Irina T (Chapter, 2012)
      We demonstrate environmentally protected delivery of high-power femtosecond mid-IR pulses in a single-mode ZBLAN fiber by soliton formation. A 70-fs Cr:ZnS laser at 2.4 µm reaches this regime already at ~1.5 nJ launched ...

    • Nonlinear proper orthogonal decomposition for convection-dominated flows 

      Ahmed, Shady E; San, Omer; Rasheed, Adil; Trian, Iliescu (Peer reviewed; Journal article, 2021)
      Autoencoder techniques find increasingly common use in reduced order modeling as a means to create a latent space. This reduced order representation offers a modular data-driven modeling approach for nonlinear dynamical ...

    • Nonlinear soil-pile interaction for offshore wind turbines 

      Markou, Athanasios; Kaynia, Amir M. (Journal article; Peer reviewed, 2018)
      The current work presents a parametric study, which involves different generalized nonlinear mechanical formulations with different damping characteristics to account for the interaction between a monopile‐supported offshore ...

    • Nonlinear state and parameter estimation of a gas-liquid cylindrical cyclone 

      Kristoffersen, Torstein Thode; Holden, Christian (Chapter, 2018)
      — New offshore oil and gas discoveries are located at deep waters with long tie-back distances. Development of such fields require compact gas-liquid separation technologies. Efficient operation of such separators require ...

    • Nonlinear State and Parameter Estimation using Discrete-Time Double Kalman Filter 

      Abdollahpouri, Mohammad; Haring, Mark; Johansen, Tor Arne; takacs, gergely; Rohal-Ilkiv, B (Journal article; Peer reviewed, 2017)
      Dealing with nonlinear dynamics in conventional estimation methods like the extended Kalman filter (EKF) is challenging, since they are not guaranteed to have global convergence, and their instability can arise by selecting ...

    • A Nonlinear State Observer for the Bi-Hormonal Intraperitoneal Artificial Pancreas 

      Davari Benam, Karim; Khoshamadi, Hasti; Lema-Pérez, Laura; Gros, Sebastien; Fougner, Anders Lyngvi (Chapter, 2022)
      Currently, continuous glucose monitoring sensors are used in the artificial pancreas to monitor blood glucose levels. However, insulin and glucagon concentrations in different parts of the body cannot be measured in ...

    • The Nonlinear Thermoacoustic Eigenvalue Problem and Its Rational Approximations: Assessment of Solution Strategies 

      Merk, Moritz; Buschmann, Philip Erik; Moeck, Jonas; Polifke, Wolfgang (Peer reviewed; Journal article, 2022)
      Nonlinear eigenvalue problems (NLEVPs) arise in thermoacoustics by considering the temporal evolution of small perturbations in the relevant governing equations. In this work, two solution strategies are compared: (i) a ...

    • Nonlinear vertical accelerations of a floating torus in regular waves 

      Li, Peng; Faltinsen, Odd Magnus; Lugni, Claudio (Journal article; Peer reviewed, 2016)
      The longitudinal motions and vertical accelerations of a floating torus as well as wave motion inside the torus are studied by model tests in regular deep-water waves. Comparisons are made with linear and partly with ...

    • Nonlocal Coupling between Antiferromagnets and Ferromagnets in Cavities 

      Johansen, Øyvind; Brataas, Arne (Journal article; Peer reviewed, 2018)
      Microwaves couple to magnetic moments in both ferromagnets and antiferromagnets. Although the magnons in ferromagnets and antiferromagnets radically differ, they can become entangled via strong coupling to the same microwave ...

    • Nonlocal nonlinear diffusion equations. Smoothing effects, Green functions, and functional inequalities 

      Bonforte, Matteo; Endal, Jørgen (Peer reviewed; Journal article, 2023)
      We establish boundedness estimates for solutions of generalized porous medium equations of the form where and is a linear, symmetric, and nonnegative operator. The wide class of operators we consider includes, but is not ...

    • Nonlocal Temporal Interferometry for Highly Resilient Free-Space Quantum Communication 

      Bulla, Lukas; Pivoluska, Matej; Hjorth, Kristian; Kohout, Oskar; Lang, Jan; Ecker, Sebastian; Neumann, Sebastian P.; Bittermann, Julius; Kindler, Robert; Huber, Marcus; Bohmann, Martin; Ursin, Rupert (Peer reviewed; Journal article, 2023)
      Entanglement distribution via photons over long distances enables many applications, including quantum key distribution, which provides unprecedented privacy. The inevitable degradation of entanglement through noise ...

    • Nonparametric modeling of self-excited forces based on relations between flutter derivatives 

      Papinutti, Mitja; Četina, Matjaž; Brank, Bostjan; Petersen, Øyvind Wiig; Øiseth, Ole Andre (Peer reviewed; Journal article, 2020)
      Unsteady self-excited forces are commonly represented by parametric models such as rational functions. However, this requires complex multiparametric nonlinear fitting, which can be a challenging task that requires know-how. ...

    • Nonperturbative analysis of the electroweak phase transition in the two Higgs doublet model 

      Andersen, Jens Oluf; Gorda, Tyler; Helset, Andreas; Niemi, Lauri; Tenkanen, Tuomas V.I.; Tranberg, Anders; Vuorinen, Aleksi; Weir, David J. (Journal article; Peer reviewed, 2018)
      We perform a nonperturbative study of the electroweak phase transition (EWPT) in the two Higgs doublet model (2HDM) by deriving a dimensionally reduced high-temperature effective theory for the model, and matching to known ...

    • Nonperturbative theory for the dispersion self-energy of atoms 

      Thiyam, Priyadarshini; Persson, Clas; Brevik, Iver Håkon; Sernelius, Bo. E.; Boström, Mathias (Journal article; Peer reviewed, 2014)
      We go beyond the approximate series expansions used in the dispersion theory of finite-size atoms. We demonstrate that a correct, and nonperturbative, theory dramatically alters the dispersion self-energies of atoms. The ...

    • Nonsmooth Analysis In Process Modeling, Design And Optimization 

      Barton, Paul I; Gundersen, Truls; Nielsen, Caroline J.; Vikse, Matias (Chapter, 2019)
      Nonsmooth models provide a powerful, compact and intuitive modeling paradigm that can represent a growing spectrum of physical phenomena over broad ranges of conditions in terms of the original process variables. This paper ...