Results 41 to 50 of about 1,089,281 (288)
Bootstrapping Locally Stationary Processes
Journal of the Royal Statistical Society Series B: Statistical Methodology, 2014 SummaryWe propose a non-parametric method to bootstrap locally stationary processes which combines a time domain wild bootstrap approach with a non-parametric frequency domain approach. The method generates pseudotime series which mimic (asymptotically) correct, the local second- and to the necessary extent the fourth-order moment structure of the ...
Kreiss, J. -P +3 more
openaire +3 more sources
In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS
FEBS Letters, EarlyView.We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka +11 more
wiley +1 more source
Remarks on extreme eigenvalues of Toeplitz matrices
International Journal of Mathematics and Mathematical Sciences, 1988 Let f be a nonnegative integrable function on [−π,π], Tn(f) the (n+1)×(n+1) Toeplitz matrix associated with f and λ1,n its smallest eigenvalue. It is shown that the convergence of λ1,n to minf(0) can be exponentially fast even when f does not satisfy the
Mohsen Pourahmadi
doaj +1 more source
Modelling of Economic Time Series and the Method of Cointegration
Austrian Journal of Statistics, 2016 The article is focused on the problem of modelling multidimensional non-stationary cointegrated processes. It is a modern method especially used for the description of multidimensional economic time series.
Jiri Neubauer
doaj +1 more source
Nonparametric spectral analysis with applications to seizure characterization using EEG time series
, 2008 Understanding the seizure initiation process and its propagation pattern(s) is a critical task in epilepsy research. Characteristics of the pre-seizure electroencephalograms (EEGs) such as oscillating powers and high-frequency activities are believed to ...
Qin, Li, Wang, Yuedong
core +2 more sources
Molecular Oncology, EarlyView.Nanosecond infrared laser (NIRL) low‐volume sampling combined with shotgun lipidomics uncovers distinct lipidome alterations in oropharyngeal squamous cell carcinoma (OPSCC) of the palatine tonsil. Several lipid species consistently differentiate tumor from healthy tissue, highlighting their potential as diagnostic markers.
Leonard Kerkhoff +11 more
wiley +1 more source
Maximum Likelihood Drift Estimation for Gaussian Process with Stationary Increments
Austrian Journal of Statistics, 2017 The paper deals with the regression model X_t = \theta t + B_t , t\in[0, T ], where B=\{B_t, t\geq 0\} is a centered Gaussian process with stationary increments.
Yuliya Mishura +2 more
doaj +1 more source
Reconsidering Dogmas about the Growth of Bacterial Populations
Cells, 2023 The growth of bacterial populations has been described as a dynamic process of continuous reproduction and cell death. However, this is far from the reality.
Bettina Ughy +8 more
doaj +1 more source
Predicting non-stationary processes
Applied Mathematics Letters, 2008 The authors are concerned with a problem of prediction of a probability measure given another one, when both are living on the space of one-way infinite finite-alphabet sequences. This means, if a sequence was considered to be generated by the first measure, when do its conditional probabilities w.r.t.
Ryabko, Daniil, Hutter, Marcus
openaire +2 more sources
Stationary systems of Gaussian processes
, 2009 We describe all countable particle systems on $\mathbb{R}$ which have the following three properties: independence, Gaussianity and stationarity. More precisely, we consider particles on the real line starting at the points of a Poisson point process ...
Kabluchko, Zakhar
core +2 more sources