Results 221 to 230 of about 1,475,278 (264)
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A Threshold Model for Heron Productivity
Journal of Agricultural, Biological, and Environmental Statistics, 2011zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Besbeas, Panagiotis, Morgan, Byron J. T.
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Statistical Properties of Threshold Models
Communications in Statistics - Theory and Methods, 2009This article focuses the attention on the Self Exciting Threshold Autoregressive Moving Average model (SETARMA) proposed in Tong (1983). The stochastic structure of the model is discussed and different specifications are presented. Starting from one of them, we give sufficient conditions for the weak stationarity of the model that are discussed and ...
AMENDOLA, Alessandra +2 more
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MODELING MATERIALS WITH A STRETCHING THRESHOLD
Mathematical Models and Methods in Applied Sciences, 2007We examine the dynamics of materials characterized by the presence of a deformation threshold beyond which no deformation is possible. The class of bodies that we are interested in studying are described by an implicit constitutive relationship between the Cauchy stress and the deformation gradient.
FARINA, ANGIOLO +3 more
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An Improved Linear Threshold Model
2020Linear threshold model is one of the widely used diffusion models in influence maximization problem. It simulates influence spread by activating nodes for an iterative way. However, the way it makes activation decisions limits the convergence speed of itself.
Xiaohong Zhang +4 more
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A threshold model for punctuated gradualism
Medical Hypotheses, 1985A model for continuous and discontinuous evolutionary change is proposed that accommodates both punctuated equilibrium and phyletic gradualism. Natural selection operating on a gaussian distribution of phenotypes subjected to severe stress will result in a skewing of the normal distribution in the direction of the favoured phenotype.
J A, Kieser, H T, Groeneveld
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Fixed threshold modeling of an adjustable threshold integrate-and-fire neuronal model
2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2008An action potential is generated when the membrane potential of a spiking neuron reaches a certain threshold. Although it is well-known that the threshold level of a neuron is not a fixed value and changes with time and neuronal parameters, its variation is often ignored in neuronal modeling due to the complexity of the analysis.
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Threshold models of mutual insurance
Automation and Remote Control, 2015Game-theoretic models of mutual insurance are considered. Here a player chooses between participating in a mutual insurance fund or not. Player's behavior depends on its risk aversion. Using a scalar coefficient of agent's risk aversion degree, we define utility functions leading to the threshold behavior of agents.
Vladimir V. Breer, Dmitry A. Novikov
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Thresholding using an illumination model
Proceedings of 2nd International Conference on Document Analysis and Recognition (ICDAR '93), 2002Most grey-level thresholding methods produce good results in situations where the illumination gradient in the original raster image is regular and not too large. In other cases, such as a large linear change in illumination, a satisfactory bi-level image cannot be produced.
James R. Parker +2 more
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A model of visual threshold detection
Journal of Theoretical Biology, 1977Abstract A model of visual incremental threshold detection is presented, having the following features. 1. (1) From Crozier's Law we deduce that all thresholds, for conventional as well as for noisy images, are ultimately determined by noise. Other evidence, which is described, supports this conclusion. 2.
G A, Hay, M S, Chesters
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Modelling hearing thresholds in the elderly
Statistics in Medicine, 1991AbstractThis paper concerns a linear mixed‐effects repeated measures model in the analysis of a large data set with over 17,000 observations in a longitudinal study of pure‐tone hearing perception in the elderly. The repeated measurements are described by fixed and random components in the model.
C H, Morrell, L J, Brant
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