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Results: 474
Integral control for population management
Christopher Guiver, H. Logemann, R. Rebarber, A. Bill, B. Tenhumberg, D. Hodgson, S. Townley
Apr 01, 2015
We present a novel management methodology for restocking a declining population. The strategy uses integral control, a concept ubiquitous in control theory which has not been applied to population dynamics. Integral control is...
Integral control for population management
Christopher Guiver, H. Logemann, R. Rebarber, A. Bill, B. Tenhumberg, D. Hodgson, S. Townley
Apr 01, 2015
We present a novel management methodology for restocking a declining population. The strategy uses integral control, a concept ubiquitous in control theory which has not been applied to population dynamics. Integral control is...
Making Integral
Rebecca Anne Barr
Oct 29, 2021
Richard Murphy frequently treated himself as a literary footnote, a mode of literary self-reproach that presumed a minor status. Renowned in the 1960s and 1970s for poems set in the West of Ireland and the history of the island...
Holobricks
Abstract Here, we propose and demonstrate a modular holographic display system that allows seamless spatial tiling of multiple coarse integral holographic (CIH) displays called “holobricks”. A...
Holobricks
Here, we propose and demonstrate a modular holographic display system that allows seamless spatial tiling of multiple coarse integral holographic (CIH) displays called "holobricks". A holobrick is a self-contained CIH module...
Path-integral approximations to quantum dynamics
Abstract
Imaginary-time path-integral or ‘ring-polymer’ methods have been used to simulate quantum (Boltzmann) statistical properties since the 1980s....
SC Althorpe
Sep 02, 2021
On the asymptotic properties of a canonical diffraction integral.
We introduce and study a new canonical integral, denoted I + - ε , depending on two complex parameters α 1 and α 2. It arises from the problem of wave diffraction by a quarter-plane and is heuristically constructed to capture...
Path-integral approximations to quantum dynamics
Stuart C. Althorpe
Jul 28, 2021
Abstract: Imaginary-time path-integral or ‘ring-polymer’ methods have been used to simulate quantum (Boltzmann) statistical properties since the 1980s. This article reviews the more recent extension of such methods to simulate...
Path-integral approximations to quantum dynamics
Stuart C. Althorpe
Aug 26, 2021
Abstract: Imaginary-time path-integral or ‘ring-polymer’ methods have been used to simulate quantum (Boltzmann) statistical properties since the 1980s. This article reviews the more recent extension of such methods to simulate...
Holobricks
Here, we propose and demonstrate a modular holographic display system that allows seamless spatial tiling of multiple coarse integral holographic (CIH) displays called “holobricks”. A holobrick is a self-contained CIH module...
Spurious Quasi-Resonances in Boundary Integral Equations for the Helmholtz Transmission Problem
We consider the Helmholtz transmission problem with piecewise-constant material coefficients, and the standard associated direct boundary integral equations. For certain coefficients and geometries, the norms of the inverses of...
Spurious Quasi-Resonances in Boundary Integral Equations for the Helmholtz Transmission Problem
We consider the Helmholtz transmission problem with piecewise-constant material coefficients, and the standard associated direct boundary integral equations. For certain coefficients and geometries, the norms of the inverses of...
Adaptive sampled-data integral control of stable infinite-dimensional linear systems
In this paper, adaptive discrete-time low-gain integral control strategies are presented for tracking constant reference signals for infinite-dimensional discrete-time power-stable linear systems. The discrete-time results are...
A new frequency-uniform coercive boundary integral equation for acoustic scattering
A new boundary integral operator is introduced for the solution of the soundsoft acoustic scattering problem, i.e., for the exterior problem for the Helmholtz equation with Dirichlet boundary conditions. We prove that this...
Numerical estimation of coercivity constants for boundary integral operators in acoustic scattering
Coercivity is an important concept for proving existence and uniqueness of solutions to variational problems in Hilbert spaces. But while coercivity estimates are well known for many variational problems arising from partial...
Point process simulation of generalised inverse Gaussian processes and estimation of the Jaeger integral
Abstract In this paper novel simulation methods are provided for the generalised inverse Gaussian (GIG) Lévy process. Such processes are intractable for simulation except in certain special edge...
Adaptive sampled-data integral control of stable infinite-dimensional linear systems
In this paper, adaptive discrete-time low-gain integral control strategies are presented for tracking constant reference signals for infinite-dimensional discrete-time power-stable linear systems. The discrete-time results are...
Numerical-asymptotic boundary integral methods in high-frequency acoustic scattering
In this article we describe recent progress on the design, analysis and implementation
of hybrid numerical-asymptotic boundary integral methods for
boundary value problems for the Helmholtz equation that model time...
of hybrid numerical-asymptotic boundary integral methods for
boundary value problems for the Helmholtz equation that model time...
A new frequency-uniform coercive boundary integral equation for acoustic scattering
A new boundary integral operator is introduced for the solution of the soundsoft acoustic scattering problem, i.e., for the exterior problem for the Helmholtz equation with Dirichlet boundary conditions. We prove that this...
A circle criterion for strong integral input-to-state stability
We present sufficient conditions for integral input-to-state stability (iISS) and strong iISS of the zero equilibrium pair of continuous-time forced Lur'e systems, where by strong iISS we mean the conjunction of iISS and...
Spectral decompositions and nonnormality of boundary integral operators in acoustic scattering
Understanding the spectral properties of boundary integral operators in acoustic scattering has important practical implications, such as for the analysis of the stability of boundary element discretizations or the convergence...
Multivariate normal distribution for integral points on varieties
Abstract: Given a variety with coefficients in , we study the distribution of the number of primes dividing the coordinates as we vary an integral point. Under suitable assumptions, we show that this has a multivariate normal...
Spectral decompositions and nonnormality of boundary integral operators in acoustic scattering
Understanding the spectral properties of boundary integral operators in acoustic scattering has important practical implications, such as for the analysis of the stability of boundary element discretizations or the convergence...
Numerical-asymptotic boundary integral methods in high-frequency acoustic scattering
In this article we describe recent progress on the design, analysis and implementation
of hybrid numerical-asymptotic boundary integral methods for
boundary value problems for the Helmholtz equation that model time...
of hybrid numerical-asymptotic boundary integral methods for
boundary value problems for the Helmholtz equation that model time...
Statistical moments for rough surface scatter from two-way parabolic integral equation at low grazing angles
The moments of a plane wave scattered at low grazing angles from a one-dimensional perfectly reflecting rough surface are considered. The mean intensity and autocorrelation of the scattered field and the corresponding angular...
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