Results 51 to 60 of about 908 (194)

On the Validity of Edgeworth and Saddlepoint Approximations

Journal of Multivariate Analysis, 1994
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Booth, J.G., Hall, P., Wood, A.T.A.
openaire   +1 more source

InstaMap: instant‐NGP for cryo‐EM density maps

Acta Crystallographica Section D, Volume 81, Issue 4, Page 147-169, April 2025.
Cryo‐EM density‐map inference, with fixed pose and contrast transfer function, using a multi‐resolution hash‐encoding framework called instant‐NGP, is described, together with its extension to heterogeneity inference by bending space with a per‐image vector field.Despite the parallels between problems in computer vision and cryo‐electron microscopy ...
Geoffrey Woollard, Wenda Zhou, Erik H. Thiede, Chen Lin, Nikolaus Grigorieff, Pilar Cossio, Khanh Dao Duc, Sonya M. Hanson   +7 more
wiley   +1 more source

On some energy‐based variational principles in non‐dissipative magneto‐mechanics using a vector potential approach

International Journal for Numerical Methods in Engineering, Volume 125, Issue 24, 30 December 2024.
Abstract This contribution covers the variational‐based modeling of non‐dissipative magneto‐mechanical systems using a vector potential approach and the thorough analysis and discussion of corresponding conforming finite element methods. Since the construction of divergence‐free finite element spaces explicitly enforcing the Coulomb gauge poses some ...
Philipp Gebhart, Thomas Wallmersperger
wiley   +1 more source

Estimation and simulation in directional and statistical shape models [PDF]

, 2012
This thesis is concerned with problems in two related areas of statistical shape analysis in two dimensional landmarks data and directional statistics in various sample spaces.
Ganeiber, Asaad Mohammed
core  

Simulating the full spin manifold of triplet‐pair states in a series of covalently linked TIPS‐pentacenes

Journal of Computational Chemistry, Volume 45, Issue 32, Page 2727-2738, December 15, 2024.
Singlet fission (SF) is a promising pathway to generate multiple charge carriers from a single photon. Possible applications reach from photovolatic cells to quantum computing. A key intermediate in the process is the singlet‐coupled triplet pair or multi‐excitonic (ME) state.
Timo Schulz, Christel M. Marian
wiley   +1 more source

Tail Exactness of Multivariate Saddlepoint Approximations [PDF]

Scandinavian Journal of Statistics, 1999
We consider a log‐concave density f in Rm satisfying certain weak conditions, particularly on the Hessian matrix of log f. For such a density, we prove tail exactness of the multivariate saddlepoint approximation. The proof is based on a local limit theorem for the exponential family generated by f.
Barndorff-Nielsen, O. E., Klüppelberg, C.   +1 more
openaire   +3 more sources

Approximation for probability of coverage in softly inhibitive cellular networks

Electronics Letters, Volume 60, Issue 17, September 2024.
The author mainly develops an analytically tractable distribution of empty space distance and explores the PGFL's upper bound for stationary Strauss point processes. These findings significantly simplify the derivation of the Laplace transform of cumulative interference as well as the overall probability of coverage in Strauss‐modelled cellular ...
Chunlin Chen
wiley   +1 more source

The Empirical Saddlepoint Approximation for GMM Estimators

, 2018
The empirical saddlepoint distribution provides an approximation to the sampling distributions for the GMM parameter estimates and the statistics that test the overidentifying restrictions.
Fallaw Sowell (3885271)
core   +1 more source

Stochastic credibility and optimal monetary policy

Australian Economic Papers, Volume 63, Issue S1, Page 124-134, May 2024.
Abstract In this paper, I study optimal monetary policy in a simple New Keynesian model with loose commitment and stochastic credibility. The loose commitment framework breaks the commitment‐discretion dichotomy in optimal monetary policy problems and allows for intermediate cases between commitment and discretion.
Oscar To
wiley   +1 more source

Saddlepoint approximations to sensitivities of tail probabilities of random sums and comparisons with Monte Carlo estimators [PDF]

, 2015
This article proposes computing sensitivities of upper tail probabilities of random sums by the saddlepoint approximation. The considered sensitivity is the derivative of the upper tail probability with respect to the parameter of the summation index ...
Peeters, Chantal, Gatto, Riccardo
core   +1 more source