Results 81 to 90 of about 18,107 (218)

Causal Discovery with Latent Confounders Based on Higher-Order Cumulants [PDF]

, 2023
Ruichu Cai, Zhiyi Huang, Wei Chen, Zhifeng Hao, Kun Zhang   +4 more
openalex   +1 more source

Functional Sieve Bootstrap for the Partial Sum Process With an Application to Change‐Point Detection

Journal of Time Series Analysis, EarlyView.
ABSTRACT This article applies the functional sieve bootstrap (FSB) to estimate the distribution of the partial sum process for time series stemming from a weakly stationary functional process. Consistency of the FSB procedure under weak assumptions on the underlying functional process is established.
Efstathios Paparoditis, Lea Wegner, Martin Wendler   +2 more
wiley   +1 more source

Adaptive Estimation for Weakly Dependent Functional Times Series

Journal of Time Series Analysis, EarlyView.
ABSTRACT We propose adaptive mean and autocovariance function estimators for stationary functional time series under 𝕃p−m‐approximability assumptions. These estimators are designed to adapt to the regularity of the curves and to accommodate both sparse and dense data designs.
Hassan Maissoro, Valentin Patilea, Myriam Vimond   +2 more
wiley   +1 more source

Cumulants in the 3-dimensional Ising, O(2) and O(4) spin models

, 2013
Based on the universal properties of a critical point in different systems and that the QCD phase transitions fall into the same universality classes as the 3-dimensional Ising, $O(2)$ or $O(4)$ spin models, the critical behavior of cumulants and higher ...
Chen, Lizhu, Chen, X. S., Pan, Xue, Wu, Yuanfang   +3 more
core   +1 more source

Spectrum Sensing Based on Higher Order Cumulants and Kurtosis Statistics Tests in Cognitive Radio [PDF]

Radioengineering, 2019
In this paper, new algorithms for spectrum sensing in cognitive radio based on higher order cumulants and kurtosis are proposed. The cumulants represent statistical signal processing based on pattern recognition for signals of different structure, and ...
R. Bozovic, M. Simic
doaj  

Fiscal policy and economic activity: new causal evidence

The Scandinavian Journal of Economics, EarlyView.
Abstract Utilizing a quasi‐natural experiment design, we identify an exogenous cut in local taxes accompanied by an equivalent reduction in local government spending, and we estimate the impact of these exogenous changes on income. We exploit a unique regional dataset that combines local income data with local voting outcomes on current expense tax ...
David M. Brasington, Marios Zachariadis
wiley   +1 more source

Bioinspired, Guanidinium, and Indole Modified Poly(glycidyl ether)s as Highly Efficient Vectors for Polyplex‐Mediated Gene Delivery

Macromolecular Rapid Communications, Volume 47, Issue 6, 20 March 2026.
Guanidinium‐ and indole‐functionalized poly(glycidyl ether)s were developed as non‐viral gene delivery vectors with tunable hydrophilic–hydrophobic balance. All polymers formed stable DNA polyplexes, while moderate indole content yielded the highest transfection efficiency at low N/P ratios.
Markus Kötzsche, Andreas Dzierza, Lennert Sölter, Jan Egger, Kjell Cornelis, Andreas Stihl, Felix H. Schacher, Dagmar Fischer, Kalina Peneva   +8 more
wiley   +1 more source

Quantification of Alkali‐Fluoride Nanoparticle Dissolution in Aqueous Media as a Function of Crystallinity and Surface Modification

Particle &Particle Systems Characterization, Volume 43, Issue 3, March 2026.
Fluoride release kinetics from uncoated and coated β−NaYF4$\ubeta-{\rm NaYF}_4$ and LiYF4${\rm LiYF}_4$ in aqueous solutions are quantified using an ion‐selective electrode coupled to a dialysis compartment. TEM/DLS/ICP‐OES and speciation‐aware modeling complement the fluoride release results.
Sophia J. Baumann, Thomas Hirsch, Thomas Baumann   +2 more
wiley   +1 more source

On moments of the derivative of CUE characteristic polynomials and the Riemann zeta function

Journal of the London Mathematical Society, Volume 113, Issue 3, March 2026.
Abstract We study the derivative of the characteristic polynomial of N×N$N \times N$ Haar‐distributed unitary matrices. We obtain new explicit formulae for complex‐valued moments when the spectral variable is inside the unit disc, in the limit N→∞$N \rightarrow \infty$.
Nicholas Simm, Fei Wei
wiley   +1 more source

Proposal for a cumulant-based Bell test for mesoscopic junctions

, 2011
The creation and detection of entanglement in solid state electronics is of fundamental importance for quantum information processing. We prove that second-order quantum correlations can be always interpreted classically and propose a general test of ...
Adam Bednorz, C. W. J. Beenakker, J. S. Bell, L. S. Levitov, M. A. Nielsen, W. Rosenfeld, Wolfgang Belzig, Y. V. Nazarov   +7 more
core   +1 more source