Results 11 to 20 of about 2,196,460 (253)

Contracts, Business Models and Barriers to Investing in Low Temperature District Heating Projects

open access: yesApplied Sciences, 2019
Approximately 1.2 EJ of energy are potentially available for recovery each year from urban heat sources in the EU. This corresponds to more than 10 percent of the EU’s total energy demand for heat and hot water.
Kristina Lygnerud   +2 more
doaj   +1 more source

Targeted model evaluations for climate services: A case study on heat waves in Bangladesh

open access: yesClimate Risk Management, 2020
Though not a sufficient condition, the ability to reproduce key elements of climate variability over the historical record should be a minimum requirement for placing any confidence in a model’s climate forecasts or projections of climate change.
Hannah Nissan   +2 more
doaj   +1 more source

A Parametric Factor Model of the Term Structure of Mortality

open access: yesEconometrics, 2019
The prototypical Lee–Carter mortality model is characterized by a single common time factor that loads differently across age groups. In this paper, we propose a parametric factor model for the term structure of mortality where multiple factors are
Niels Haldrup   +1 more
doaj   +1 more source

Singular Spectrum Analysis of Tremorograms for Human Neuromotor Reaction Estimation

open access: yesMathematics, 2022
Singular spectrum analysis (SSA) is a method of time series analysis and is used in various fields, including medicine. A tremorogram is a biological signal that allows evaluation of a person’s neuromotor reactions in order to infer the state of the ...
Olga Bureneva   +2 more
doaj   +1 more source

Hybrid Time Series Method for Long-Time Temperature Series Analysis

open access: yesDiscrete Dynamics in Nature and Society, 2021
This paper combines discrete wavelet transform (DWT), autoregressive moving average (ARMA), and XGBoost algorithm to propose a weighted hybrid algorithm named DWTs-ARMA-XGBoost (DAX) on long-time temperature series analysis.
Guangdong Huang, Jiahong Li
doaj   +1 more source

Mandelbrot's Stochastic Time Series Models

open access: yesEarth and Space Science, 2019
I survey and illustrate the main time series models that Mandelbrot introduced into time series analysis in the 1960s and 1970s. I focus particularly on the members of the additive fractional stable family including Lévy flights and fractional Brownian ...
N. W. Watkins
doaj   +1 more source

Demonstrating the value of larger ensembles in forecasting physical systems

open access: yesTellus: Series A, Dynamic Meteorology and Oceanography, 2016
Ensemble simulation propagates a collection of initial states forward in time in a Monte Carlo fashion. Depending on the fidelity of the model and the properties of the initial ensemble, the goal of ensemble simulation can range from merely quantifying ...
Reason L. Machete, Leonard A. Smith
doaj   +1 more source

Assessing pricing assumptions for weather index insurance in a changing climate

open access: yesClimate Risk Management, 2014
Weather index insurance is being offered to low-income farmers in developing countries as an alternative to traditional multi-peril crop insurance. There is widespread support for index insurance as a means of climate change adaptation but whether or not
J.D. Daron, D.A. Stainforth
doaj   +1 more source

Flexible Time Series Analysis [PDF]

open access: yes, 2000
In this chapter we present nonparametric methods and available quantlets for nonlinear modelling of univariate time series. A general nonlinear time series model for an univariate stochastic process Y t t=1 T is given by the heteroskedastic nonlinear autoregressive (NAR) process $${Y_t} = f\left( {{Y_{t - i1}},{Y_{t - i2}}, \ldots ,{Y_{t - im ...
Härdle, Wolfgang, Tschernig, Rolf
openaire   +5 more sources

Escape from model-land

open access: yesEconomics: Journal Articles, 2019
Both mathematical modelling and simulation methods in general have contributed greatly to understanding, insight and forecasting in many fields including macroeconomics.
Thompson Erica L., Smith Leonard A.
doaj   +1 more source

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