Results 21 to 30 of about 11,724,681 (306)

ACCURACY OF ESTIMATES OF VOLUME FRACTION

Image Analysis and Stereology, 2011
When estimating a volume fraction VV from point count fractions PP using Delesse's principle VV = PP, very little information on the accuracy of the estimator can be obtained from the basic theory of stereology.
Joanne Chia, Adrian Baddeley
doaj   +1 more source

Delta Methods in Enveloping Rings, II

Journal of Algebra, 1993
Let \(L\) be a Lie algebra over a field of characteristic 0 with universal enveloping algebra \(U(L)\) and let \(L\) act as derivations on an associative algebra \(R\). Let \(\Delta_ L\) be the join of the finite- dimensional ideals of \(L\). In the first part of this paper [ibid.
Bergen, J., Passman, D.S.
openaire   +2 more sources

Derivation of a Closed-Form Asymptotic Variance for the Coefficient of Variation Under the Reparameterized Birnbaum–Saunders Distribution

Axioms
This study develops a tractable, closed-form expression for the asymptotic variance of the coefficient of variation (CV) estimator under a reparameterized Birnbaum–Saunders (BirSau) distribution. Using the method of moments, we derive analytical formulas
Tossapol Phoophiwfa, Piyapatr Busababodhin, Andrei Volodin, Sujitta Suraphee   +3 more
doaj   +1 more source

Variance models of the last age interval and their impact on life expectancy at subnational scales

Demographic Research, 2016
Background: The Chiang method is the most widely accepted standard for estimating life expectancy (LE) at subnational scales; it is the only method that provides an equation for the LE variance.
Ernest Lo, Dan Vatnik, Andrea Benedetti, Robert Bourbeau   +3 more
doaj   +1 more source

A Hybrid Data-Differencing and Compression Algorithm for the Automotive Industry

Entropy, 2022
We propose an innovative delta-differencing algorithm that combines software-updating methods with LZ77 data compression. This software-updating method relates to server-side software that creates binary delta files and to client-side software that ...
Sabin Belu, Daniela Coltuc
doaj   +1 more source

A Study on the Optimal Ratio of Research and Development Investment in the Energy Sector: An Empirical Analysis in South Korea

Energies, 2019
The necessity for energy research and development (ER&D) is increasing as greenhouse gases and climate change are becoming global issues. To support sustainable economic growth through ER&D, it is necessary to examine the optimal ratio of ER& ...
Juyong Lee, Youngsang Cho, Jungwoo Shin
doaj   +1 more source

Experimental Comparison of Preferential vs. Common Delta Connections for the Star-Delta Starting of Induction Motors

Energies, 2021
Although this is a fact that is not very explored in the literature, there are two possible forms to connect the stator winding of an induction motor in the delta.
José Augusto Itajiba, Cézar Armando Cunha Varnier, Sergio Henrique Lopes Cabral, Stéfano Frizzo Stefenon, Valderi Reis Quietinho Leithardt, Raúl García Ovejero, Ademir Nied, Kin-Choong Yow   +7 more
doaj   +1 more source

On the Asymptotic Normality of the Method of Moments Estimators for the Birnbaum–Saunders Distribution with a New Parametrization

Mathematics
This study investigates the asymptotic properties of method-of-moments estimators for the Birnbaum–Saunders distribution under a newly proposed parametrization.
Piyapatr Busababodhin, Tossapol Phoophiwfa, Andrei Volodin, Sujitta Suraphee   +3 more
doaj   +1 more source

Democratic Confidence Intervals for comparing two Proportions [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2013
We offer methods to create an accurate graph for comparing confidence intervals for two proportions. The firstmethod involves using weighted sum contrasts when fitting logistic regression with a binary explanatory variable.
Phattrawan Tongkumchum, Rattikan Saelim, Nifatamah Makaje, Aniruth Phon-On   +3 more
doaj  

Analysis of Cat Chu mango value chain in the Mekong Delta

Tạp chí Phát triển và Hội nhập, 2023
Development uses primary data sources through investigating subjects related to the Cat Chu mango value chain in the Mekong Delta region such as mango farmers, cooperatives, collectors, processing companies, retailers, chain supporters and use ...
Thong Van Le
doaj   +1 more source