Results 131 to 140 of about 440,340 (303)

Markov Chain Monte Carlo Technology [PDF]

In the past fifteen years computational statistics has been enriched by a powerful, somewhat abstract method of generating variates from a target probability distribution that is based on Markov chains whose stationary distribution is the probability ...
Chib, Siddhartha
core  

Austrocedrus from the Late Cretaceous of Antarctica and its implications for the early evolution of southern cypresses (Callitroideae, Cupressaceae)

American Journal of Botany, EarlyView.
Abstract Premise The modern distribution of the southern cypresses, Callitroideae (Cupressaceae), reflects a classic Gondwanan distribution. The initial diversification of Callitroideae is estimated to have occurred during the Cretaceous, yet fossils from this period are rare, hampering our understanding of its early evolutionary history.
Kelly C. Pfeiler, Kelly K. S. Matsunaga, Ana Andruchow‐Colombo, Ari Iglesias, Selena Y. Smith, Brian A. Atkinson   +5 more
wiley   +1 more source

Particle Filters for Markov Switching Stochastic Volatility Models [PDF]

This paper proposes an auxiliary particle filter algorithm for inference in regime switching stochastic volatility models in which the regime state is governed by a first-order Markov chain.
Boda Kang, Yun Bao, Carl Chiarella
core  

Place‐based risk: Examining relationships between adolescent perceptions of community risk factors and adolescent substance use across geographic contexts

American Journal of Community Psychology, EarlyView.
Abstract Mixed evidence for the influence of structural and social factors on adolescent substance use behaviors exists across the rural–urban continuum. Therefore, this study explores how adolescent perceptions of structural and social community risk factors are associated with lifetime and past 30‐day use of alcohol, marijuana, cigarettes, and ...
Melissa Pearman Fenton, Sarah D. Lynne, Josie L. Bryan, Catherine Woodstock Striley, Larry F. Forthun   +4 more
wiley   +1 more source

Markov Chains and Markov Processes

, 2016
Markov chain, which was named after Andrew Markov is a mathematical system that transfers a state to another state. Many real world systems contain uncertainty. This study helps us to understand the basic idea of a Markov chain and how is been useful in our daily lives.
openaire   +1 more source

The importance Markov chain

Stochastic Processes and their Applications
The Importance Markov chain is a novel algorithm bridging the gap between rejection sampling and importance sampling, moving from one to the other through a tuning parameter. Based on a modified sample of an instrumental Markov chain targeting an instrumental distribution (typically via a MCMC kernel), the Importance Markov chain produces an extended ...
Andral, Charly, Douc, Randal, Marival, Hugo, Robert, Christian   +3 more
openaire   +4 more sources

Molecular methods for differentiating Phragmites australis subspecies and identification of hybrid stands in the Upper Midwestern United States

Applications in Plant Sciences, EarlyView.
Abstract Premise In North America, Phragmites australis (common reed) has drawn a great deal of research attention. Non‐native P. australis subsp. australis is a noxious weed that has locally displaced native P. australis subsp. americanus in some areas.
Nicholas P. Tippery, Daniel J. Larkin, Julia Bohnen, Douglas L. Wendell, Neil O. Anderson, Susan M. Galatowitsch, Marie Abbey, Alan G. Smith, Andrzej K. Noyszewski   +8 more
wiley   +1 more source

Lipocalin‐2 activates hepatic stellate cells and promotes nonalcoholic steatohepatitis in high‐fat diet–fed Ob/Ob mice

Hepatology, EarlyView., 2022
Graphical summary of obesity‐induced NASH progression by LCN2 targeted to HSC activation. Abstract Background and Aims In obesity and type 2 diabetes mellitus, leptin promotes insulin resistance and contributes to the progression of NASH via activation of hepatic stellate cells (HSCs).
Kyung Eun Kim, Jaewoong Lee, Hyun Joo Shin, Eun Ae Jeong, Hye Min Jang, Yu Jeong Ahn, Hyeong Seok An, Jong Youl Lee, Meong Cheol Shin, Soo Kyoung Kim, Won Gi Yoo, Won Ho Kim, Gu Seob Roh   +12 more
wiley   +1 more source

Perturbation theory for Markov chains

, 2022
reservedIl lavoro di tesi consiste nella ricerca di maggioranti della "distanza" tra le distribuzioni di due catene di Markov, ipotizzando che una, l'originale, sia perturbata nell'altra.
PALMIOTTO, MATTIA
core  

An ontological morphological phylogenetic framework for living and extinct ray‐finned fishes (Actinopterygii)

The Anatomical Record, EarlyView.
Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley   +1 more source