Results 101 to 110 of about 4,516 (208)

ARMA modeling

, 1988
This thesis estimates the frequency response of a network where the only data is the output obtained from an Autoregressive-moving average (ARMA) model driven by a random input. Models of random processes and existing methods for solving ARMA models are examined.
openaire   +1 more source

Rolling and Burning to Transform Woody Species Thickets and Restore Abandoned Farmland

Ecological Management &Restoration, Volume 27, Issue 2, May 2026.
ABSTRACT Woody plant encroachment is a key issue that needs to be addressed when restoring abandoned farmland previously used for livestock grazing. In a conservation context, woody shrubs can be problematic if they prevent the establishment of a desired vegetation composition and structure by outcompeting other species for light, nutrients and water ...
H. Neilly, P. Cale
wiley   +1 more source

A Fusion of Statistical and Machine Learning Methods: GARCH-XGBoost for Improved Volatility Modelling of the JSE Top40 Index

International Journal of Financial Studies
Volatility modelling is a key feature of financial risk management, portfolio optimisation, and forecasting, particularly for market indices such as the JSE Top40 Index, which serves as a benchmark for the South African stock market.
Israel Maingo, Thakhani Ravele, Caston Sigauke   +2 more
doaj   +1 more source

Spatial–Temporal Graph Learning for Taxi Origin–Destination Demand Prediction

Transactions on Emerging Telecommunications Technologies, Volume 37, Issue 4, April 2026.
To address the challenges of origin–destination semantic differentiation and data sparsity in taxi origin–destination demand prediction, we propose a multilevel continuous‐time dynamic node‐ based attention network (MCNAT). The results show that MCNAT outperforms the base model in all metrics.
Mingxia Huang, Bingyan Zheng, Dan Peng
wiley   +1 more source

Antimicrobial Effect of Spices and Their Phytochemicals: A Novel Approach to Overcoming Antibiotic Resistance

MedComm, Volume 7, Issue 4, April 2026.
This graphical abstract shows the antibacterial potential of phytochemicals from 15 spices, showcasing key compounds, their extraction methods, and mechanisms of action. It highlights membrane disruption, ROS generation, enzyme inhibition, and biofilm prevention as core antibacterial pathways.
Hettiyahandi Binodh De Silva, Yanqi Dai, Shervanthi Homer‐Vanniasinkam, Mohan Edirisinghe   +3 more
wiley   +1 more source

Estimating Mediterranean Cyclone Activity via Explainable Machine Learning

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract Intense cyclones in the Mediterranean drive most of the region's rainfall and wind‐wave extremes, exerting a significant socio‐economic impact. Currently there are no established analytical tools for estimating Mediterranean cyclone activity from climatological fields.
Guido Ascenso, Luca Proserpio, Leone Cavicchia, Enrico Scoccimarro, Matteo Giuliani, Andrea Castelletti   +5 more
wiley   +1 more source

Adaptive expectations and reaction to information

Economica, Volume 93, Issue 370, Page 488-523, April 2026.
Abstract This paper develops a model combining adaptive expectations with noisy signals, and derives three coefficients and one impulse response function (IRF): the Coibion–Gorodnichenko (CG) coefficient capturing consensus under‐reaction to information, the Bordalo–Gennaioli–Ma–Shleifer coefficient capturing individual over‐reaction, the Kohlhas ...
Junyi Liao
wiley   +1 more source

The Monetary Policy–Commodities Nexus: A Survey

Journal of Economic Surveys, Volume 40, Issue 2, Page 1050-1082, April 2026.
ABSTRACT This survey synthesizes evidence on the bidirectional links between commodity markets and monetary policy. On the commodities‐to‐policy side, we review how shocks to energy, food, and metals pass through to inflation, inflation expectations, economic activity, and financial stability in state‐dependent ways that vary by shock type, exposure ...
Martin T. Bohl, Niklas Humann, Pierre L. Siklos   +2 more
wiley   +1 more source

Global Warming Has Accelerated Significantly

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Recent record‐hot years have caused discussion over whether global warming has accelerated. Previous analysis found acceleration (i.e., increase in warming rate) has not yet reached a 95% confidence level, given natural temperature variability. We remove the estimated influence of three main natural variability factors: El Niño, volcanism, and
G. Foster, S. Rahmstorf
wiley   +1 more source

On scalable ARMA models

This paper considers both the least squares and quasi-maximum likelihood estimation for the recently proposed scalable ARMA model, a parametric infinite-order vector AR model, and their asymptotic normality is also established. It makes feasible the inference on this computationally efficient model, especially for economic and financial time series. An
Lin, Yuchang, Li, Wenyu, Zhu, Qianqian, Li, Guodong   +3 more
openaire   +2 more sources