Results 11 to 20 of about 2,955,171 (326)

Clustering student skill set profiles in a unit hypercube using mixtures of multivariate betas [PDF]

open access: yes, 2013
<br>This paper presents a finite mixture of multivariate betas as a new model-based clustering method tailored to applications where the feature space is constrained to the unit hypercube.
Dean, Nema, Nugent, Rebecca
core   +1 more source

Granular Temperature and Segregation in Dense Sheared Particulate Mixtures

open access: yesKONA Powder and Particle Journal, 2016
In gravity-driven flows of different-sized (same density) particles, it is well known that larger particles tend to segregate upward (toward the free surface), and the smaller particles downward in the direction of gravity.
Kimberly M. Hill, Yi Fan
doaj   +1 more source

Heterogeneity in Trajectories of Systolic Blood Pressure among Young Adults in Qingdao Port Cardiovascular Health Study

open access: yesGlobal Heart, 2020
Background: Although increased age is associated with higher systolic blood pressure (SBP) in general, there may be variation across individuals in how SBP changes over time.
Haiqun Lin   +11 more
doaj   +1 more source

Numerical Analysis of Mixed Convective Heat Transfer from a Square Cylinder Utilizing Nanofluids with Multi-Phase Modelling Approach

open access: yesEnergies, 2021
The present study deals with the numerical simulation of mixed convective heat transfer from an unconfined heated square cylinder using nanofluids (Al2O3-water) for Reynolds number (Re) 10–150, Richardson number (Ri) 0–1, and nanoparticles volume ...
Rajendra S. Rajpoot   +2 more
doaj   +1 more source

A compressible mixture model with phase transition [PDF]

open access: yes, 2013
We introduce a new thermodynamically consistent diffuse interface model of Allen--Cahn/Navier--Stokes type for multi-component flows with phase transitions and chemical reactions.
Dreyer, Wolfgang   +2 more
core   +5 more sources

Modeling Learner Heterogeneity: A Mixture Learning Model With Responses and Response Times

open access: yesFrontiers in Psychology, 2018
The increased popularity of computer-based testing has enabled researchers to collect various types of process data, including test takers' reaction time to assessment items, also known as response times. In recent studies, the relationship between speed
Susu Zhang, Shiyu Wang
doaj   +1 more source

Deep Gaussian Mixture Models [PDF]

open access: yes, 2017
Deep learning is a hierarchical inference method formed by subsequent multiple layers of learning able to more efficiently describe complex relationships. In this work, Deep Gaussian Mixture Models are introduced and discussed.
McLachlan, Geoffrey J., Viroli, Cinzia
core   +2 more sources

Model‐based clustering reveals patterns in central place use of a marine top predator

open access: yesEcosphere, 2020
Satellite telemetry data are commonly used to quantify habitat selection, examine animal movements, and delineate home ranges. These data also contain valuable information concerning dens, nests, roosts, and other central places that are often associated
Brian M. Brost   +2 more
doaj   +1 more source

Improved Initialization of the EM Algorithm for Mixture Model Parameter Estimation

open access: yesMathematics, 2020
A commonly used tool for estimating the parameters of a mixture model is the Expectation−Maximization (EM) algorithm, which is an iterative procedure that can serve as a maximum-likelihood estimator.
Branislav Panić   +2 more
doaj   +1 more source

Heat Transfer Enhancement of TiO2/Water Nanofluids Flowing Inside a Square Minichannel with a Microfin Structure: A Numerical Investigation

open access: yesEnergies, 2019
A combination of two passive heat transfer enhancement techniques using a microfin structure and nanofluids was investigated numerically. TiO2/water nanofluids flowing inside a square minichannel with a microfin structure (SMM) were observed as a ...
Budi Kristiawan   +4 more
doaj   +1 more source

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