Results 141 to 150 of about 161,763 (281)

Flexible unimodal density estimation in hidden Markov models

Methods in Ecology and Evolution, EarlyView.
Abstract Hidden Markov models (HMMs) are powerful tools for modelling time‐series data with underlying state structure. However, selecting appropriate parametric forms for the state‐dependent distributions is often challenging and can lead to model misspecification.
Jan‐Ole Fischer, Fanny Dupont, Marie Auger‐Méthé, Marianne Marcoux, Nigel E. Hussey, Nancy E. Heckman   +5 more
wiley   +1 more source

Numerical study on the 6-DOF motions of ship turning in waves. [PDF]

Sci Rep
Zhan J, Ma Y, Zhan C, Shang H.
europepmc   +1 more source

A comparison of clustering approaches to create sites for occupancy models from opportunistic biodiversity surveys

Methods in Ecology and Evolution, EarlyView.
Abstract Opportunistic surveys, such as those archived by citizen science biodiversity inventory programs, can provide species observations over large spans of space and time. Like most biodiversity data, opportunistic reports suffer from imperfect detection of organisms, which can distort species distribution models used for science and natural ...
Nahian Ahmed, Mark Roth, Tyler A. Hallman, W. Douglas Robinson, Rebecca A. Hutchinson   +4 more
wiley   +1 more source

Numerical Investigation of the Water-Exit Performance of a Bionic Unmanned Aerial-Underwater Vehicle with Front-Mounted Propeller. [PDF]

Biomimetics (Basel)
Dong Y, Wang Q, Wu W, Zhang Z.
europepmc   +1 more source

Differential item functioning detection across multiple groups

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Differential item functioning (DIF) can be investigated by estimating item response theory (IRT) parameters separately for different respondent groups, thus allowing for the detection of discrepancies in parameter estimates across groups. However, before comparing the estimates, it is necessary to convert them to a common metric due to the ...
Michela Battauz
wiley   +1 more source

Hydrodynamic Study of Flow-Channel and Wall-Effect Characteristics in an Oscillating Hydrofoil Biomimetic Pumping Device. [PDF]

Biomimetics (Basel)
Hua E, Lin Y, Li S, Wu X.
europepmc   +1 more source

Composite marginal likelihood estimation of higher‐order diagnostic classification models under high dimensionality

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Although full‐information maximum likelihood (FIML) estimation is widely used for diagnostic classification models (DCMs), its computational efficiency deteriorates sharply in high‐dimensional settings. This scalability challenge is increasingly critical as DCMs are applied to large‐scale assessments, psychological testing and longitudinal ...
Minho Lee, Yon Soo Suh
wiley   +1 more source

Influence of speed and line spacing on aerodynamic forces in high speed train passing in tunnels. [PDF]

Sci Rep
Duan X, Mei Y, Hu X, Qi C.
europepmc   +1 more source

Revisiting reliability and measurement precision: Towards a unified perspective

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract This article revisits the concepts of reliability and measurement precision across classical test theory (CTT), item response theory (IRT) and cognitive diagnosis models (CDMs), emphasizing their conceptual differences and proposing a unified framework.
Jimmy de la Torre, Klaas Sijtsma, Rodrigo Schames Kreitchmann   +2 more
wiley   +1 more source

Vortex Dynamics in the Sinus of Valsalva. [PDF]

Bioengineering (Basel)
Fan J, Sundström E.
europepmc   +1 more source