Results 21 to 30 of about 39,145,954 (311)

Estimation of missing data in a geophysical series of precipitation

open access: yes, 2021
The analysis of dynamic systems is a topic of great interest in the basic sciences since it allows direct inference of the behavior of different systems. The study of physical phenomena provides large databases that, if recorded at regular time intervals,
GALLARDO PÉREZ, HENRY DE JESÚS   +5 more
core   +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

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

findstructureintime/Time-Series-Analysis v0.0.1

open access: yes, 2020
This is the github repository containing the four Matlab code modules with sample examples introduced in the paper, Finding Structure in Time: Visualizing and Analyzing Behavioral Time ...
Tian Linger Xu
core   +1 more source

Polynomial Regressions and Nonsense Inference

open access: yesEconometrics, 2013
Polynomial specifications are widely used, not only in applied economics, but also in epidemiology, physics, political analysis and psychology, just to mention a few examples.
Daniel Ventosa-Santaulària   +1 more
doaj   +1 more source

Investor Sentiment Measurement and Time Series Analysis [PDF]

open access: yesSHS Web of Conferences, 2023
Investor sentiment is one of the destabilizing factors in the stock market. In the past, some scholars have proposed models for the measurement of emotions. On this basis, this paper selects 9 factors (closed-end fund discount rate, trading volume of the
Bai Yuchen
doaj   +1 more source

Visibility Graph Based Time Series Analysis. [PDF]

open access: yesPLoS ONE, 2015
Network based time series analysis has made considerable achievements in the recent years. By mapping mono/multivariate time series into networks, one can investigate both it's microscopic and macroscopic behaviors. However, most proposed approaches lead
Mutua Stephen, Changgui Gu, Huijie Yang
doaj   +1 more source

Eddies: Fluid Dynamical Niches or Transporters?–A Case Study in the Western Baltic Sea

open access: yesFrontiers in Marine Science, 2019
Fluid flows in the ocean have a strong impact on the growth and distribution of planktonic communities. In this case study, we applied a Lagrangian eddy detection and tracking tool and a transfer operator approach to data from a coupled hydrodynamical ...
Rahel Vortmeyer-Kley   +5 more
doaj   +1 more source

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