Results 91 to 100 of about 7,652,103 (218)

Is it growing exponentially fast? -- Impact of assuming exponential growth for characterizing and forecasting epidemics with initial near-exponential growth dynamics

Infectious Disease Modelling, 2016
The increasing use of mathematical models for epidemic forecasting has highlighted the importance of designing models that capture the baseline transmission characteristics in order to generate reliable epidemic forecasts.
G. Chowell, C. Viboud
semanticscholar   +1 more source

Knife-Edge Conditions in the Modeling of Long-Run Growth Regularities [PDF]

Balanced (exponential) growth cannot be generalized to a concept which would not require knife-edge conditions to be imposed on dynamic models. Already the assumption that a solution to a dynamical system (i.e.
Jakub Growiec
core   +2 more sources

A comment on the relationship between firms' size and growth rate [PDF]

Since the seminal work of Pareto, many empirical analyses suggested that the distribution of firms size is characterized by an asymptotic power like behavior.
Giulio Bottazzi
core  

Elevated acetyl‐CoA by amino acid recycling fuels microalgal neutral lipid accumulation in exponential growth phase for biofuel production

Plant Biotechnology Journal, 2016
Summary Microalgal neutral lipids [mainly in the form of triacylglycerols (TAGs)], feasible substrates for biofuel, are typically accumulated during the stationary growth phase.
Lina Yao, Hui Shen, Nan Wang, Jaspaul Tatlay, Liang Li, T. Tan, Yuan-Kun Lee   +6 more
semanticscholar   +1 more source

Efficient experimental designs for sigmoidal growth models [PDF]

For the Weibull- and Richards-regression model robust designs are determined by maximizing a minimum of D- or D1-efficiencies, taken over a certain range of the non-linear parameters.
Dette, Holger, Pepelyshev, Andrey
core  

Spectral calibration of exponential Lévy Models [1] [PDF]

We investigate the problem of calibrating an exponential Lévy model based on market prices of vanilla options. We show that this inverse problem is in general severely ill-posed and we derive exact minimax rates of convergence.
Denis Belomestny, Markus Reiß
core  

Hyperconvex representations and exponential growth [PDF]

Ergodic Theory and Dynamical Systems, 2013
AbstractLet$G$be a real algebraic semi-simple Lie group and$\Gamma $be the fundamental group of a closed negatively curved manifold. In this article we study the limit cone, introduced by Benoist [Propriétés asymptotiques des groupes linéaires.Geom. Funct. Anal.
openaire   +2 more sources

Exponential growth and the spectrum of the Laplacian [PDF]

Proceedings of the American Mathematical Society, 1981
Conditions are given on a noncompact manifold which allow one to conclude that 0 is in the spectrum of the Laplacian on M M
openaire   +2 more sources

Exponential Growth and Lower Bounds for the Blow-up Time of Solutions for a System of Kirchhoff-type Equations

Journal of New Results in Science, 2019
This paper deals with the system of Kirchhoff-type equations with a bounded domain Ω⊂Rⁿ. We prove exponential growth of solutions with negative initial energy. Later, we give some estimates for lower bounds of the blow up time.
Veysel Butakın, Fatma Ekinci, Erhan Pişkin   +2 more
doaj  

Solving a spectral problem for large-area photonic crystal surface-emitting lasers

Mathematical Modelling and Analysis
We present algorithms for constructing and resolving spectral problems for novel photonic crystal surface-emitting lasers with large emission areas, given by first-order PDEs with two spatial dimensions.
Mindaugas Radziunas, Eduard Kuhn, Hans Wenzel   +2 more
doaj   +1 more source