Results 81 to 90 of about 152,517 (290)
Average optimality for continuous-time Markov decision processes under weak continuity conditions
, 2014 This article considers the average optimality for a continuous-time Markov decision process with Borel state and action spaces and an arbitrarily unbounded nonnegative cost rate.
Zhang, Yi
core +1 more source
Realistic Representation, Dynamic Evolution and Determinants of Institutional Quality in China
International Studies of Economics, EarlyView.ABSTRACT The paper delves into the role of institutional quality in bolstering China's economic resilience post‐COVID‐19, CITIC‐Entropy. It divides institutions into basic and changeable categories, establishing an index system via the CITIC‐Entropy TOPSIS model.
Susu Wang, Qidi Zhang, Jing Fang
wiley +1 more source
MRI for Lung Cancer Management: Any Closer to Clinical Application?
Journal of Magnetic Resonance Imaging, EarlyView.ABSTRACT Management of lung cancer (LC) encompasses screening, diagnosis, staging, radiotherapy planning and guidance, therapy monitoring and surveillance. Across these domains, magnetic resonance imaging (MRI) offers a range of morphological and functional imaging capabilities—including diffusion‐weighted imaging (DWI), dynamic contrast‐enhanced (DCE)
Juergen Biederer +10 more
wiley +1 more source
Equilibrium Measures for Semi-Markov Processes
The Annals of Probability, 1977 This paper simplifies and extends previous results on the existence of an equilibrium or stationary measure for the age process associated with a semi-Markov chain: $$(\mathbf{I}_{(t)}, \mathbf{Z}_{(t)}) = \text{(last state entered before time t}$$, $$\text{duration of this last sojourn up to} t$$).
openaire +2 more sources
Hidden Markov Quantile Models With Trends for Analysing Air Temperature Data
International Journal of Climatology, EarlyView.There is the question of whether climate change, expressed by time‐trends in temperature, is of a heterogeneous nature or not. Here, the time‐trend heterogeneity argument has been investigated using Hidden Markov (HM) quantile time‐trends models in temperature time series.
Georgios Tsiotas +2 more
wiley +1 more source
The Hierarchical Dirichlet Process Hidden Semi-Markov Model [PDF]
, 2010 There is much interest in the Hierarchical Dirichlet Process Hidden Markov Model (HDP-HMM) as a natural Bayesian nonparametric extension of the traditional HMM.
Johnson, Matthew James, Willsky, Alan S
core
L-cumulants, L-cumulant embeddings and algebraic statistics
, 2012 Focusing on the discrete probabilistic setting we generalize the combinatorial definition of cumulants to L-cumulants. This generalization keeps all the desired properties of the classical cumulants like semi-invariance and vanishing for independent ...
Zwiernik, Piotr
core +1 more source
Land Degradation &Development, EarlyView.ABSTRACT Coal remains a major global energy source despite ongoing environmental controversies, particularly, regarding climate change and landscape transformation. This study investigates the spatiotemporal dynamics of land use and land cover (LULC) in the Moatize Coal Basin (MCB), Mozambique, between 1990 and 2024, with a specific focus on land ...
Ivan Latinho Naite +2 more
wiley +1 more source
Credit Risk Assessment Using Fuzzy Inhomogeneous Markov Chains Within a Fuzzy Market
RisksIn the present study, we model the migration process and the changes in the market environment. The migration process is being modeled as an F-inhomogeneous semi-Markov process with fuzzy states.
P.-C.G. Vassiliou
doaj +1 more source
IEEE Access, 2019 In this paper, we are concerned with the stability analysis of stochastic systems switched by the ergodic semi-Markovian process. The sufficient conditions for almost sure exponential stability are derived by using the method of multiple Lyapunov ...
Bao Wang, Quanxin Zhu
doaj +1 more source