scholarly journals Adsorption isotherms of pear at several temperatures

2015 ◽  
Vol 19 (3) ◽  
pp. 1119-1129 ◽  
Author(s):  
Vangelce Mitrevski ◽  
Monika Lutovska ◽  
Vladimir Mijakovski ◽  
Ivan Pavkov ◽  
Mirko Babic ◽  
...  
Keyword(s):  
Experimental Data ◽  
Adsorption Isotherms ◽  
Performance Index ◽  
Gravimetric Method ◽  
Model Parameters ◽  
Data Set ◽  
Average Performance ◽  
C 30 ◽  
Isotherm Equations ◽  
Run Test

The moisture adsorption isotherms of pear were determined at 15?C, 30?C and 45?C using the standard static gravimetric method over a range of water activity from 0.112 to 0.920. The experimental data were fitted with isotherm equations recommended in ASAE Standard D245.5. In order to find which equation gives the best results, large number of numerical experiments were performed. After that, several statistical criteria proposed in scientific literature for estimation and selection of the best sorption isotherm equations were used. For each equation and experimental data set, the average performance index was calculated and models were ranked afterwards. After that, some statistical rejection criteria were checked (D?Agostino-Pearson test of normality, single-sample run test and significance and precision of the model parameters). The performed statistical analysis shows that the Guggenheim-Anderson-de Boer (GAB) equation has the highest value of average performance index, but higher correlation between pair of parameters leads to lower precision of estimated parameters.

scholarly journals Calibration of Electrical Resistance to Moisture Content for Beech Laminated Veneer Lumber “BauBuche S” and “BauBuche Q”

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 635
Author(s):  
Philippe Grönquist ◽  
Gianna Weibel ◽  
Claude Leyder ◽  
Andrea Frangi
Keyword(s):  
Moisture Content ◽  
Electrical Resistance ◽  
High Performance ◽  
Beech Wood ◽  
Gravimetric Method ◽  
Model Parameters ◽  
Data Set ◽  
Laminated Veneer Lumber ◽  
Calibration Models ◽  
Different Depths

Electrical resistance measurements are often employed for the purpose of nondestructive long-term monitoring of wood moisture content (MC) in timber structures. As a structural material for high-performance load-bearing applications in such structures, beech laminated veneer lumber (LVL) enjoys a growing popularity. However, due to the processing of beech LVL affecting physical properties, calibration curves for bulk beech wood cannot be used. In this study, resistance was measured on 160 beech LVL samples equilibrated in four different relative humidity (RH) climates. The results show a difference not only between the beech LVL products “BauBuche S” and “BauBuche Q”, but also between measurements at two different depths. For each data set, parameters for calibration models using two and using three model parameters were determined by regression analysis to MC determined by the gravimetric method.

A mathematical model of the murine ventricular myocyte: a data-driven biophysically based approach applied to mice overexpressing the canine NCX isoform

2010 ◽  
Vol 299 (4) ◽  
pp. H1045-H1063 ◽  
Author(s):  
L. Li ◽  
S. A. Niederer ◽  
W. Idigo ◽  
Y. H. Zhang ◽  
P. Swietach ◽  
...  
Keyword(s):  
Experimental Data ◽  
Sarcoplasmic Reticulum ◽  
Action Potential ◽  
Heart Diseases ◽  
Wild Type Mouse ◽  
Left Ventricular ◽  
Model Parameters ◽  
Mouse Heart ◽  
Data Set ◽  
Intracellular Ca

Mathematical modeling of Ca2+ dynamics in the heart has the potential to provide an integrated understanding of Ca2+-handling mechanisms. However, many previous published models used heterogeneous experimental data sources from a variety of animals and temperatures to characterize model parameters and motivate model equations. This methodology limits the direct comparison of these models with any particular experimental data set. To directly address this issue, in this study, we present a biophysically based model of Ca2+ dynamics directly fitted to experimental data collected in left ventricular myocytes isolated from the C57BL/6 mouse, the most commonly used genetic background for genetically modified mice in studies of heart diseases. This Ca2+ dynamics model was then integrated into an existing mouse cardiac electrophysiology model, which was reparameterized using experimental data recorded at consistent and physiological temperatures. The model was validated against the experimentally observed frequency response of Ca2+ dynamics, action potential shape, dependence of action potential duration on cycle length, and electrical restitution. Using this framework, the implications of cardiac Na+/Ca2+ exchanger (NCX) overexpression in transgenic mice were investigated. These simulations showed that heterozygous overexpression of the canine cardiac NCX increases intracellular Ca2+ concentration transient magnitude and sarcoplasmic reticulum Ca2+ loading, in agreement with experimental observations, whereas acute overexpression of the murine cardiac NCX results in a significant loss of Ca2+ from the cell and, hence, depressed sarcoplasmic reticulum Ca2+ load and intracellular Ca2+ concentration transient magnitude. From this analysis, we conclude that these differences are primarily due to the presence of allosteric regulation in the canine cardiac NCX, which has not been observed experimentally in the wild-type mouse heart.

EXPERIMENTAL DATA SET NO. 24: PHASE DISTRIBUTION IN BUBBLY FLOW

1992 ◽  
Vol 6 (1-4) ◽  
pp. 257-301 ◽  
Author(s):  
Akimi Serizawa ◽  
Isao Kataoka ◽  
Itaru Michiyoshi
Keyword(s):  
Experimental Data ◽  
Phase Distribution ◽  
Bubbly Flow ◽  
Data Set

EXPONENTIATED HALF-LOGISTIC LOMAX DISTRIBUTION WITH PROPERTIES AND APPLICATION

2019 ◽  
Vol XVI (2) ◽  
pp. 1-11
Author(s):  
Farrukh Jamal ◽  
Hesham Mohammed Reyad ◽  
Soha Othman Ahmed ◽  
Muhammad Akbar Ali Shah ◽  
Emrah Altun
Keyword(s):  
Real Data ◽  
Continuous Model ◽  
Model Parameters ◽  
Data Set ◽  
Lomax Distribution ◽  
Mathematical Properties ◽  
Proposed Model ◽  
Probability Weighted Moment ◽  
Record Statistics ◽  
Maximum Likelihood Criterion

A new three-parameter continuous model called the exponentiated half-logistic Lomax distribution is introduced in this paper. Basic mathematical properties for the proposed model were investigated which include raw and incomplete moments, skewness, kurtosis, generating functions, Rényi entropy, Lorenz, Bonferroni and Zenga curves, probability weighted moment, stress strength model, order statistics, and record statistics. The model parameters were estimated by using the maximum likelihood criterion and the behaviours of these estimates were examined by conducting a simulation study. The applicability of the new model is illustrated by applying it on a real data set.

Sign in / Sign up

Export Citation Format

Share Document