no code implementations • 22 Mar 2024 • Elise Mills, Graeme F. Clark, Matthew J. Simpson, Mark Baird, Matthew P. Adams
Sigmoid growth models are often used to study population dynamics.
1 code implementation • 4 Mar 2024 • Michael J. Plank, Matthew J. Simpson
Parameter inference and uncertainty quantification are important steps when relating mathematical models to real-world observations, and when estimating uncertainty in model predictions.
1 code implementation • 4 Jul 2023 • Ryan J. Murphy, Oliver J. Maclaren, Matthew J. Simpson
A fundamental and often overlooked choice in this approach involves relating the solution of a mathematical model with noisy and incomplete measurement data.
1 code implementation • 13 Jun 2023 • Stuart T. Johnston, Matthew J. Simpson
We obtain the solution by identifying a series of transformations that converts the model of a nonlinear diffusive process on an evolving domain to a nonlinear diffusion equation on a fixed domain, which admits known exact solutions for certain choices of diffusivity functions.
1 code implementation • 19 Apr 2023 • Stuart T. Johnston, Matthew J. Simpson
The exact solutions reveal the relationship between model parameters, such as the diffusivity and the type and rate of domain growth, and key statistics, such as the survival and splitting probabilities.
1 code implementation • 21 Dec 2021 • Yifei Li, Pascal R. Buenzli, Matthew J. Simpson
One way of exploring this question is to study population dynamics using reaction-diffusion equations, where migration is usually represented as a linear diffusion term, and birth-death is represented with a bistable source term.
1 code implementation • 23 Feb 2021 • Simon Martina-Perez, Matthew J. Simpson, Ruth E. Baker
Equation learning aims to infer differential equation models from data.
1 code implementation • 5 Jan 2021 • Yifei Li, Stuart T. Johnston, Pascal R. Buenzli, Peter van Heijster, Matthew J. Simpson
In this work we study population survival or extinction using a stochastic, discrete lattice-based random walk model where individuals undergo movement, birth and death events.
1 code implementation • 16 Nov 2020 • John T. Nardini, Ruth E. Baker, Matthew J. Simpson, Kevin B. Flores
We propose that methods from the equation learning field provide a promising, novel, and unifying approach for agent-based model analysis.
Dynamical Systems
1 code implementation • 26 May 2020 • John H. Lagergren, John T. Nardini, Ruth E. Baker, Matthew J. Simpson, Kevin B. Flores
Biologically-informed neural networks (BINNs), an extension of physics-informed neural networks [1], are introduced and used to discover the underlying dynamics of biological systems from sparse experimental data.
no code implementations • 6 Mar 2020 • Sean T. Vittadello, Scott W. McCue, Gency Gunasingh, Nikolas K. Haass, Matthew J. Simpson
As motivation for our model we provide experimental data that illustrate the induced-switching process.
1 code implementation • 28 Dec 2019 • David J. Warne, Ruth E. Baker, Matthew J. Simpson
For many stochastic models of interest in systems biology, such as those describing biochemical reaction networks, exact quantification of parameter uncertainty through statistical inference is intractable.
1 code implementation • 14 Sep 2019 • David J. Warne, Ruth E. Baker, Matthew J. Simpson
In this work, we present new computational Bayesian techniques that accelerate inference for expensive stochastic models by using computationally inexpensive approximations to inform feasible regions in parameter space, and through learning transforms that adjust the biased approximate inferences to closer represent the correct inferences under the expensive stochastic model.
Computation Cell Behavior Molecular Networks
1 code implementation • 14 Dec 2018 • David J. Warne, Ruth E. Baker, Matthew J. Simpson
Stochasticity is a key characteristic of intracellular processes such as gene regulation and chemical signalling.
Molecular Networks
1 code implementation • 21 Oct 2018 • Elliot J. Carr, Matthew J. Simpson
In this work, we present a new class of homogenization approximations by considering a stochastic diffusive transport model on a one-dimensional domain containing an arbitrary number of layers with different jump rates.
Biological Physics Computational Physics 82C70