Results 1 to 10 of about 10,362,785 (303)

A Flexible Multivariate Distribution for Correlated Count Data

open access: yesStats, 2021
Multivariate count data are often modeled via a multivariate Poisson distribution, but it contains an underlying, constraining assumption of data equi-dispersion (where its variance equals its mean).
Kimberly F. Sellers   +3 more
doaj   +2 more sources

A Conway–Maxwell–Poisson-Binomial AR(1) Model for Bounded Time Series Data

open access: yesEntropy, 2023
Binomial autoregressive models are frequently used for modeling bounded time series counts. However, they are not well developed for more complex bounded time series counts of the occurrence of n exchangeable and dependent units, which are becoming ...
Huaping Chen, Jiayue Zhang, Xiufang Liu
doaj   +1 more source

Modeling Under-Dispersed Count Data by the Generalized Poisson Distribution via Two New MM Algorithms

open access: yesMathematics, 2023
Under-dispersed count data often appear in clinical trials, medical studies, demography, actuarial science, ecology, biology, industry and engineering.
Xun-Jian Li   +4 more
doaj   +1 more source

Study on Modification of Nano Alumina and Its Enhancement of Physical Properties of Water-Based Acrylic Coatings [PDF]

open access: yesCailiao Baohu, 2023
For enhancing the physical properties of water-based acrylic resin coating, a green modified water-based nano-alumina dispersion was successfully prepared by regulating mass fraction of anti-sedimentation dispersant under the condition of ultrasonication.
LI Minghua, GAO Jie, JIANG Dongming, YU Shujun, DU Zhiqiang
doaj   +1 more source

Effect of cavitation bubble on the dispersion of magnetorheological polishing fluid under ultrasonic preparation

open access: yesUltrasonics Sonochemistry, 2021
In the ultrasonic dispersion process, the ultrasonic cavitation effect can seriously affect the dispersion efficiency of magnetorheological polishing fluid (MRPF), but the mechanism remains unclear now.
Ce Guo   +3 more
doaj   +1 more source

Nano-Structured Materials under Irradiation: Oxide Dispersion-Strengthened Steels

open access: yesNanomaterials, 2021
Oxide dispersion-strengthened materials are reinforced by a (Y, Ti, O) nano-oxide dispersion and thus can be considered as nanostructured materials. In this alloy, most of the nanoprecipitates are (Y, Ti, O) nano-oxides exhibiting a Y2Ti2O7 pyrochlore ...
Joël Ribis   +6 more
doaj   +1 more source

Basic Features of the Analysis of Germination Data with Generalized Linear Mixed Models

open access: yesData, 2020
Germination data are discrete and binomial. Although analysis of variance (ANOVA) has long been used for the statistical analysis of these data, generalized linear mixed models (GzLMMs) provide a more consistent theoretical framework. GzLMMs are suitable
Alberto Gianinetti
doaj   +1 more source

Tablet Disintegration and Dispersion under In Vivo-like Hydrodynamic Conditions

open access: yesPharmaceutics, 2022
Disintegration and dispersion are functional properties of tablets relevant for the desired API release. The standard disintegration test (SDT) described in different pharmacopoeias provides only limited information on these complex processes.
Jan Lenz   +5 more
doaj   +1 more source

Indexing Inefficacy of Efforts to Stop Escalation of COVID Mortality

open access: yesMathematics, 2022
Background: COVID-19 efforts were often ineffective in controlling the spread of the pandemic. Thus, identifying ineffective controls during a pandemic is vital.
Ramalingam Shanmugam   +3 more
doaj   +1 more source

Assessing farmers' contribution to greenhouse gas emission and the impact of adopting climate-smart agriculture on mitigation

open access: yesEcological Processes, 2020
Background The adoption of climate-smart agricultural (CSA) practices is expected to improve farmers’ adaptation to climate change and also increase yields while simultaneously curbing greenhouse gas (GHG) emissions.
Michael Ayeah Israel   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy