Results 41 to 50 of about 38,030 (174)

Least Trimmed Squares: Cointegration and Outliers

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT When applying the cointegrated autoregressive distributed lag model it is common to include indicator variables for outliers. This is often done in a somewhat ad hoc way. Least Trimmed Squares estimation provides a more systematic approach. This estimator is robust to a large number of outliers of many types.
Vanessa Berenguer‐Rico, Bent Nielsen
wiley   +1 more source

Cumulant expansion of the periodic Anderson model in infinite dimension

, 1997
The diagrammatic cumulant expansion for the periodic Anderson model with infinite Coulomb repulsion ($U=\infty $) is considered here for an hypercubic lattice of infinite dimension ($d=\infty $).
Figueira M S, Fulde P, Hewson A C, Hewson A C, Hubbard J, Hubbard J, Hubbard J, Hubbard J, M E Foglio, M S Figueira, Metzner W, Muller Hartmann E, Mutou T, Mutou T, Mutou T, Wortis M, Yang D H Y   +16 more
core   +1 more source

Simulation‐Informed Evaluation of Microvascular Parameter Mapping for Diffusion MR Imaging of Solid Tumours

Magnetic Resonance in Medicine, Volume 96, Issue 1, Page 387-402, July 2026.
ABSTRACT Purpose We aim to inform the design of new diffusion MRI (dMRI) approaches for microvasculature quantification that enhance the biological specificity of imaging towards cancer. Methods We adopted simulation‐informed modelling of the vascular dMRI signal. We synthesised signals from 1500 synthetic vascular networks, for a variety of protocols (
Anna Kira Voronova, Olivia Prior, Athanasios Grigoriou, Francesc Salvà, Elena Elez, Luz M. Atlagich, Roser Sala‐Llonch, Marco Palombo, Els Fieremans, Dmitry S. Novikov, Raquel Perez‐Lopez, Francesco Grussu   +11 more
wiley   +1 more source

Full counting statistics of a chaotic cavity with asymmetric leads

, 2005
We study the statistics of charge transport in a chaotic cavity attached to external reservoirs by two openings of different size which transmit non-equal number of quantum channels.
Bagrets D A, Belzig W, Bomze Yu Gershon G Shovkun D Levitov L S Reznikov M, Gutman D B, Levitov L S, Nazarov Yu V, Nazarov Yu V, Nazarov Yu V, Oberholzer S, Oleg M Bulashenko, Pilgram S, Vanevic M Belzig W   +11 more
core   +1 more source

Toward Super‐Resolution Reconstruction of Diffusion–Relaxation MRI Using Slice Excitation With Random Overlap (SERO)

Magnetic Resonance in Medicine, Volume 95, Issue 6, Page 3213-3226, June 2026.
ABSTRACT Purpose Diffusion MRI probes tissue microstructure, but low SNR and limited resolution hinder detection of features and parameter estimates. We introduce slice excitation with random overlap (SERO), which enables variable repetition times (TRs) and diffusion weighting within a single shot.
Felix Mortensen, Jakub Jurek, Jens Sjölund, Geraline Vis, Ronnie Wirestam, Malwina Molendowska, Andrzej Materka, Filip Szczepankiewicz   +7 more
wiley   +1 more source

Counting statistics of the Dicke superradiance phase transition

, 2013
We consider a driven single mode Dicke-Hamiltonian coupled to a dissipative zero-temperature bath. We derive the cumulant generating function for emitted photons of this quantum-critical system by using a $P$-representation of the master equation in the ...
Brandes, Tobias, Emary, Clive, Kopylov, Wassilij   +2 more
core   +1 more source

Cumulative Computing

Electronic Notes in Theoretical Computer Science, 2003
AbstractIn this paper we use the concept of resource cumulation to model various forms of computation. The space of cumulations (called a cumulator) is simply represented as a five tuple consisting of a well-founded partial order, a monoid and a volume function.
openaire   +1 more source

Hierarchical Bayesian Modelling Improves Microstructural Parameter Mapping in Diffusion and Exchange MRI Data

NMR in Biomedicine, Volume 39, Issue 6, June 2026.
Our hierarchical Bayesian modelling (HBM) technique is demonstrated in two neuroimaging diffusion MRI models. When compared with least‐squares (LSQ) minimisation, HBM increased the accuracy, precision, contrast‐to‐noise ratio and parameter map quality in simulated and human data. HBM also resolved local parameter variations associated with white matter
Elizabeth Powell, Mark Maskery, Hedley C. A. Emsley, Laura M. Parkes, Geoff J. M. Parker, Paddy J. Slator   +5 more
wiley   +1 more source

Understanding the Phenotypic Heterogeneity Within the Sporadic Creutzfeldt–Jakob Disease MV1 Subtype

Neuropathology and Applied Neurobiology, Volume 52, Issue 3, June 2026.
We present the clinical, pathological and prion biophysical features of three atypical cases of the MV1 subtype of sporadic Creutzfeldt–Jakob disease (sCJD). We propose that these heterozygous cases exist on a spectrum ranging from MM1‐like to VV1‐like phenotypes and recommend that subtyping be performed at pH 6.9 to avoid missing atypical or mixed ...
Satish K. Nemani, Leonardo M. Cortez, Jennifer Myskiw, Ignazio Cali, Stephanie A. Booth, Gerard H. Jansen, Valerie L. Sim   +6 more
wiley   +1 more source

Collective mode reductions for populations of coupled noisy oscillators

, 2018
We analyze accuracy of different low-dimensional reductions of the collective dynamics in large populations of coupled phase oscillators with intrinsic noise. Three approximations are considered: (i) the Ott-Antonsen ansatz, (ii) the Gaussian ansatz, and
Goldobin, Denis S., Klimenko, Lyudmila S., Pikovsky, Arkady, Tyulkina, Irina V.   +3 more
core   +1 more source