Results 221 to 230 of about 4,894 (291)

Testing for Rough Volatility When Prices Are Purely Discontinuous

Journal of Time Series Analysis, EarlyView.
ABSTRACT We consider the problem of nonparametric testing for rough volatility, using high‐frequency data with a fixed time span, in a setting where the price is purely discontinuous. More specifically, we analyze the asymptotic properties of a test we developed in previous work in a pure‐jump setting.
Carsten H. Chong, Viktor Todorov
wiley   +1 more source

A voxel-wise uncertainty-guided framework for glioma segmentation using spherical projection-based U-Net and localized refinement. [PDF]

Med Phys
Yang Z, Yang C, Zhang R, Wang C, Chen M, Yin FF.   +5 more
europepmc   +1 more source

On Testing for Independence Between Generalized Error Models of Several Time Series

Journal of Time Series Analysis, EarlyView.
ABSTRACT We define generalized innovations associated with generalized error models having arbitrary distributions, that is, distributions that can be mixtures of continuous and discrete distributions. These models include stochastic volatility models and regime‐switching models with possibly zero‐inflated regimes.
Kilani Ghoudi, Bouchra R. Nasri, Bruno N. Rémillard   +2 more
wiley   +1 more source

Fused ensembles of dynamic-rupture earthquake simulations to accelerate Bayesian inference. [PDF]

GEM
Kurapati V, Schneller D, Seelinger L, Niu Z, Gabriel AA, Bader M.   +5 more
europepmc   +1 more source

Measure‐valued processes for energy markets

Mathematical Finance, Volume 35, Issue 2, Page 520-566, April 2025.
Abstract We introduce a framework that allows to employ (non‐negative) measure‐valued processes for energy market modeling, in particular for electricity and gas futures. Interpreting the process' spatial structure as time to maturity, we show how the Heath–Jarrow–Morton approach can be translated to this framework, thus guaranteeing arbitrage free ...
Christa Cuchiero, Luca Di Persio, Francesco Guida, Sara Svaluto‐Ferro   +3 more
wiley   +1 more source

MCGC-Net: A Text-Enhanced Geometry-Consistent Network for UAV-Based Road Crack Detection. [PDF]

Sensors (Basel)
Ou Z, He S, Bu R, Wang P, Gong G.
europepmc   +1 more source

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

Modeling 3D mesoscaled neuronal complexity through learning-based dynamic morphometric convolution. [PDF]

Brain Inform
Cheng YS, Zhao R, Wang H, Peng H, Chrzanowski W, Cai W.   +5 more
europepmc   +1 more source

Navigating Supply Shocks: Sector Resilience and Production Prices Through Stochastic Input–Output Modeling

Mathematical Finance, EarlyView.
ABSTRACT This study develops a novel multivariate stochastic framework for assessing systemic risks, such as climate and nature‐related shocks, within production or financial networks. By embedding a linear stochastic fluid network, interpretable as a generalized vector Ornstein–Uhlenbeck process, into the production network of interdependent ...
Giovanni Amici, Gianluca Fusai, Anna Maria Gambaro, Daniele Marazzina   +3 more
wiley   +1 more source

Cooperative Tracking of Vessel Trajectory by Multi-Static Passive Stations Using an MC-RMPF. [PDF]

Sensors (Basel)
Liu B, Kong L, Wu P.
europepmc   +1 more source