Results 61 to 70 of about 61,880 (163)
Robust autoresonant excitation in the plasma beat-wave accelerator: a theoretical study
, 2004 A modified version of the Plasma Beat-Wave Accelerator scheme is introduced and analyzed, which is based on autoresonant phase-locking of the nonlinear Langmuir wave to the slowly chirped beat frequency of the driving lasers via adiabatic passage through
A. Akhiezer +5 more
core +3 more sources
Binary Independent Component Analysis: A Non-stationarity-based Approach
, 2021 We consider independent component analysis of binary data. While fundamental in practice, this case has been much less developed than ICA for continuous data. We start by assuming a linear mixing model in a continuous-valued latent space, followed by a binary observation model.
Hyvärinen Aapo +2 more
openaire +4 more sources
Non-stationarity and Dissipative Time Crystals: Spectral Properties and Finite-Size Effects
, 2020 We discuss the emergence of non-stationarity in open quantum many-body systems. This leads us to the definition of dissipative time crystals which display experimentally observable, persistent, time-periodic oscillations induced by noisy contact with an ...
Booker, Cameron +2 more
core
StabilizeNet: a novel framework for alleviating non-stationarity in time series
大数据Time series prediction is widely used in many fields in modern life, and its importance has become increasingly prominent. Non-stationarity is one of the main issues affecting the accuracy of time series predictions.
AN Junxiu, WAN Lilang
doaj +2 more sources
Evidence for Non‐Stationarity in the GEV Shape Parameter When Modeling Extreme Rainfall
Water Resources ResearchIt is now well established that climate change is increasing the intensity of extreme rainfall. What is less well established is how best to model these changes.
Lalani Jayaweera +2 more
doaj +1 more source
Structural changes, common stochastic trends and unit roots in panel data [PDF]
In this paper we propose a new test statistic that considers multiple structural breaks to analyse the non-stationarity of a panel data set. The methodology is based on the common factor analysis in an attempt to allow for some sort of dependence across ...
Jushan Bai
core
Solar Flare Occurrence Rate and Waiting Time Statistics
, 2012 We use Renewal Theory for the estimation and interpretation of the flare rate from the Geostationary Operational Environmental Satellite (GOES) soft X-ray flare catalogue. It is found, that in addition to the flare rate variability with the solar cycles,
Gorobets, Andrei, Messerotti, Mauro
core +1 more source
Non-stationarity and meta-distribution [PDF]
In this paper we deal with the problem of non-stationarity encountered in a lot of data sets, mainly in financial and economics domains, coming from the presence of multiple seasonnalities, jumps, volatility, distorsion, aggregation, etc.
Dominique Guegan
core
, 2007 We investigate the behavior of the Shanghai Stock Exchange Composite (SSEC) index for the period from 1990:12 to 2007:06 using an unconstrained two-regime threshold autoregressive (TAR) model with an unit root developed by Caner and Hansen.
Basci +23 more
core +1 more source
Fiscal Regimes and the (Non)Stationarity of Debt [PDF]
SSRN Electronic Journal, 2018 This paper analyzes the sustainability of fiscal debt contingent on fiscal policy operating in two fiscal regimes. The first regime is characterized by active policy (not reacting to debt) and the other by passive fiscal policy (reacting to debt).
openaire +2 more sources