Results 151 to 160 of about 4,579 (296)

Reinforcement Learning for Jump‐Diffusions, With Financial Applications

Mathematical Finance, EarlyView.
ABSTRACT We study continuous‐time reinforcement learning (RL) for stochastic control in which system dynamics are governed by jump‐diffusion processes. We formulate an entropy‐regularized exploratory control problem with stochastic policies to capture the exploration–exploitation balance essential for RL.
Xuefeng Gao, Lingfei Li, Xun Yu Zhou
wiley   +1 more source

A geophysical investigation of the Roter Kamm impact crater, Namibia

Meteoritics &Planetary Science, EarlyView.
Abstract The Roter Kamm impact crater is located in the southern Namib Desert. The crater has a diameter of 2.5 km and belongs to the category of simple, bowl‐shaped impact craters, with an elevated rim of fractured target rock. The crater's interior is completely buried beneath sediments, preventing extensive surface investigations of the bedrock ...
Hannah Nienhaus, Pritam Yogeshwar, Wiebke Mörbe, Bülent Tezkan, Yajun Liu, Bufelo Lushetile, Martin Melles   +6 more
wiley   +1 more source

Gauss Curvature Flow on Surfaces of Revolution -- The Noncompact Case [PDF]

Earlier work of the first author examined two boundary value problems associated to the Gauss Curvature Flow on a surface of revolution generated by a positive, differentiable function on a compact interval. In this continuation, two noncompact cases are
Solanilla, Leonardo, Jeffres, Thalia D.
core  

α-Gauss Curvature Flows and Free Boundary Problems [PDF]

, 2013
학위논문 (박사)-- 서울대학교 대학원 : 수리과학부, 2013. 8. 이기암.본 학위논문은 알파 지수 가우스 곡률을 속력으로 갖는 n+1차원 유클리드 공간에 있는 n차원 순볼록 초곡면의 변형을 연구한다.
김라미
core  

Raman analysis of organic refractory materials after energetic processing: Evidence for amorphous carbon on TNOs and comets

Meteoritics &Planetary Science, EarlyView.
Abstract Amorphous carbon (αC) is found in various extraterrestrial particles, including those thought to originate from the outer Solar System. αC can form through two main processes involving C‐rich materials: exposure to energetic charged particles and thermal processing.
M. Germanà, A. Vyjidak, G. A. Baratta, B. M. Giuliano, R. G. Urso, C. Scirè, D. Fulvio, T. Grassi, P. Jusko, P. Caselli, M. E. Palumbo   +10 more
wiley   +1 more source

Forty Years of Empirical Evidence of Cointegration and Nonlinear Equilibrium Correction in UK Money Demand Since the XIXth Century

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT Since the seminal contributions of Friedman and Schwartz and of Hendry and Ericsson, instability in money demand has remained a central issue in the literature. This study broadens and generalizes the first evidence for the United Kingdom of stable long‐ and short‐run broad money demand extending back to the nineteenth century. Using nonlinear
Álvaro Escribano, Juan‐Andrés Rodríguez, Miguel A. Arranz   +2 more
wiley   +1 more source

Repelled Point Processes With Application to Numerical Integration

Scandinavian Journal of Statistics, EarlyView.
ABSTRACT We look at Monte Carlo numerical integration from a stochastic geometry point of view. While crude Monte Carlo estimators relate to linear statistics of a homogeneous Poisson point process (PPP), linear statistics of more regularly spread point processes can yield unbiased estimators with faster‐decaying variance, and thus lower integration ...
Diala Hawat, Gabriel Mastrilli, Rémi Bardenet, Raphaël Lachièze‐Rey   +3 more
wiley   +1 more source

Seismic Fragility and Vulnerability of Partially Grouted Flexural‐Controlled Reinforced Masonry Buildings in Colombia

Earthquake Spectra, Volume 42, Issue 3, August 2026.
This paper presents the development of analytical fragility and vulnerability functions for flexure‐controlled partially grouted reinforced masonry (RM) buildings that are representative of Colombian urban areas, with the goal of enhancing national seismic risk assessments.
Juan C. Reyes, J. Paul Smith‐Pardo, Santiago Portilla, Emersson Torres, Andrea C. Riaño   +4 more
wiley   +1 more source

Single‐Breathhold 3D MR Elastography in the Liver, With Simultaneous R2* and PDFF Mapping

Magnetic Resonance in Medicine, Volume 96, Issue 2, Page 682-697, August 2026.
Purpose To develop a sequence for the rapid acquisition of MR elastography (MRE) parameters in 3D, with simultaneous measurement of proton‐density fat fraction (PDFF) and R2* for multiparametric assessment of liver disease. Methods The proposed sequence uses an interleaved motion‐encoding scheme to acquire 3D volumes of all motion encodings and wave ...
Donovan P. Tripp, Anne‐Sophie van Schelt, Omar Darwish, Karl P. Kunze, Shamsa Al Harthy, Nader S. Metwalli, Ahmed M. Gharib, Claudia Prieto, René M. Botnar, Ralph Sinkus, Radhouene Neji   +10 more
wiley   +1 more source

Paleosecular Variation Constraints on Geomagnetic Field Morphology at ca. 1100 Ma

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Paleosecular variation provides a statistical test of long‐term geomagnetic field morphology, but its behavior across Precambrian polarity regimes remains poorly constrained. We compile a virtual geomagnetic pole dispersion data set spanning 1130–1070 Ma and apply nonlinear Model G fitting to evaluate field structure across the interval ...
Hanqing Zhao, Shihong Zhang, Jikai Ding, Qiang Ren, Haiyan Li, Weiwei Bian, Tianshui Yang, Huaichun Wu   +7 more
wiley   +1 more source