Results 81 to 90 of about 267,158 (314)

Causal‐Guided Ultra‐Long‐Term Time Series Forecasting Via Anticipated Covariates

open access: yesAdvanced Science, EarlyView.
Often treated as unknown, information from the future remains underutilized.We demonstrate that in a coupled dynamical system, providing the future state of the effect enables accurate forecasting of the cause for a long timesteps. A time series forecasting paradigm that introduces anticipated covariates to represent such known future states is ...
Jintong Zhao   +4 more
wiley   +1 more source

Parameter estimation for networked SIR models with stochastic perturbations using JEKF: a study using COVID-19 daily data from Indian states

open access: yesSystems Science & Control Engineering
By using graph Laplacian diffusion, the susceptible-infected-removed (SIR) epidemic model is expanded to include a weighted network that exhibits randomness in the transmission rate parameter, representing population mobility between network nodes.
Prince Achankunju, Saroj Kumar Dash
doaj   +1 more source

Understanding Egg Price Volatility and Policy Implications in the U.S. With Machine Learning

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT Eggs are an inexpensive and sustainable source of proteins, but volatility in the U.S. egg prices has intensified in recent years, raising concerns over food affordability and market stability. This study examines the drivers of U.S. egg price dynamics over 2004–2025 using a two‐stage framework that combines LASSO‐based variable selection with
Xuemei Zhao   +3 more
wiley   +1 more source

Asymptotic behavior of traveling waves for a nonlocal epidemic model with delay

open access: yesElectronic Journal of Differential Equations, 2017
In this article we study the traveling wave solutions of a monostable nonlocal reaction-diffusion system with delay arising from the spread of an epidemic by oral-faecal transmission.
Haiqin Zhao
doaj  

Statistical Properties of SIS Processes with Heterogeneous Nodal Recovery Rates in Networks

open access: yesApplied Sciences
The modeling and analysis of epidemic processes in networks have attracted much attention over the past few decades. A major underlying assumption is that the recovery process and infection process are homogeneous, allowing the associated theoretical ...
Dongchao Guo, Libo Jiao, Wendi Feng
doaj   +1 more source

Chapter 3 Inference Based on the Diffusion Approximation of Epidemic Models

open access: yes, 2019
In the first part of these notes, several mathematical models have been proposed to describe Epidemic dynamics in a closed homogeneous community. The properties of the stochastic SEIR model have been studied in the first part of these notes.
Pardoux, Etienne   +3 more
core   +1 more source

On the Economics of US Agricultural Policy

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT This paper presents an economic analysis of US agricultural policy, building on a modified version of Gardner's efficient redistribution. We argue that agricultural policy is motivated as an attempt to implement an efficient redistribution scheme that redistributes income toward farmers who, as a group, have been adversely affected by ...
Jean‐Paul Chavas
wiley   +1 more source

Hierarchical Structures in Livestock Trade Networks—A Stochastic Block Model of the German Cattle Trade Network

open access: yesFrontiers in Veterinary Science, 2020
Trade of cattle between farms forms a complex trade network. We investigate partitions of this network for cattle trade in Germany. These partitions are groups of farms with similar properties and they are inferred directly from the trade pattern between
Laura Brzoska   +3 more
doaj   +1 more source

The deterministic SIS epidemic model in a Markovian random environment

open access: yes, 2016
We consider the classical deterministic susceptible-infective-susceptible epidemic model, where the infection and recovery rates depend on a background environmental process that is modeled by a continuous time Markov chain.
López Herrero, María Jesús   +1 more
core   +1 more source

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