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  1. Article

    Open Access

    Minimising turbine thrust variation in multi-rotor tidal fences

    Recent analysis of tidal stream energy devices has focussed on maximising power output. Studies have shown that significant performance enhancement can be achieved through the constructive interference effects...

    T. F. L. Stephenson, C. R. Vogel in Journal of Ocean Engineering and Marine Energy (2020)

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  2. No Access

    Article

    Prospects for Tidal Stream Energy in the UK and South America: A Review of Challenges and Opportunities

    Concerns about energy production and climate change are driving transitions towards renewable electricity sources around the world. Tidal stream energy has been identified as an energy source with potential as...

    C. R. Vogel, D. T. Taira, B. S. Carmo, G. R. S. Assi, R H. J. Willden… in Polytechnica (2019)

  3. No Access

    Article

    Analysis of Constrained Optimization Variants of the Map-Seeking Circuit Algorithm

    The map-seeking circuit algorithm (MSC) was developed by Arathorn to efficiently solve the combinatorial problem of correspondence maximization, which arises in applications like computer vision, motion estim...

    S. R. Harker, C. R. Vogel, T. Gedeon in Journal of Mathematical Imaging and Vision (2007)

  4. No Access

    Chapter and Conference Paper

    Negative Results for Multilevel Preconditioners in Image Deblurring

    A one-dimensional deconvolution problem is discretized and certain multilevel preconditioned iterative methods are applied to solve the resulting linear system. The numerical results suggest that multilevel mu...

    C. R. Vogel in Scale-Space Theories in Computer Vision (1999)

  5. No Access

    Chapter and Conference Paper

    An Adaptive Stencil Finite Differencing Scheme for Linear First Order Hyperbolic Systems—A Preliminary Report

    The simulation of wave propagation through highly heterogeneous media is important in many applications, e.g., seismic and ultrasound modeling and imaging. In these applications, material parameters may vary w...

    Robert H. Hoar, C. R. Vogel in Computation and Control IV (1995)

  6. No Access

    Chapter and Conference Paper

    A Multigrid Method for Total Variation-Based Image Denoising

    Byimage reconstruction we mean obtaining the solution u of an operator equation of the form (1.1) $$Au = z,$$ w...

    C. R. Vogel in Computation and Control IV (1995)

  7. No Access

    Article

    Analysis of signal optimization problems for dielectric media

    The authors have recently presented the results of the numerical implementation of a scheme for designing an incident electromagnetic plane wave which will deposit a maximum amount of energy in any selected po...

    R. L. Ochs Jr, C. R. Vogel in Journal of Optimization Theory and Applications (1993)

  8. No Access

    Chapter

    A Modified Levenberg-Marquardt Algorithm for Large-Scale Inverse Problems

    Distributed parameter estimation problems typically involve attempts to invert infinite dimensional nonlinear compact operators. In this case the derivative, or Jacobian, is a compact linear operator. Via the ...

    C. R. Vogel, J. G. Wade in Computation and Control III (1993)

  9. No Access

    Chapter

    The Effects of Noise and Bandlimiting on a One Dimensional Time Dependent Inverse Scattering Technique

    In realistic settings data used as input to any inverse scattering algorithm is bandlimited and corrupted by noise. At present there is no satisfactory way to determine the extent to which reconstructions usin...

    J. P. Corones, R. J. Krueger, C. R. Vogel in Review of Progress in Quantitative Nondest… (1985)