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article

Wybrane zagadnienia modelowania matematyczno-statystycznego struktur i procesów przestrzennych

Tomasz M. Kossowski

Rozwój Regionalny i Polityka Regionalna > 2020 > 50 > 159-174

Niniejsze opracowanie jest przeglądem wybranych zagadnień z zakresu modelowania matematyczno-statystycznego struktur i procesów przestrzennych. Ogólny charakter tego artykułu obejmuje dyskusję nad podstawowymi pojęciami, takimi jak: układ przestrzenny, struktura przestrzenna, proces przestrzenny, i ich wzajemnymi relacjami. Następnie definiowany jest w sposób ogólny (stochastyczny) proces przestrzenny...

article

Estimation of Wind Drift and Evaporation Losses from Sprinkler Irrigation systemS by Different Data‐Driven Methods

E. Maroufpoor, H. Sanikhani, S. Emamgholizadeh, Ö. Kişi

Irrigation and Drainage > 67 > 2 > 222 - 232

An accurate estimation of losses created by wind drift and evaporation is necessary for water management in sprinkler irrigation systems. In the current study, three artificial intelligence (AI) methods, namely artificial neural network (ANN), adaptive neuro‐fuzzy inference system (ANFIS) and gene expression programming (GEP), were used to estimate the wind drift and evaporation losses (WDEL) based...

article

Performance de l’échographie dans l’estimation du poids fœtal à terme

M. Lafont, P. Dellinger, W. Mutumba, C. Bernard, more

Gyn�cologie Obst�trique & Fertilit� > 2016 > 44 > 7-8 > 391-395

Our aim was to evaluate the accuracy of estimated fetal weight (EFW) by ultrasound at due date and the factors that could affect it.We performed a retrospective study of 233 patients in 2014. An ultrasound was performed at due date consultation around 41 weeks of amenorrhea by midwives sonographer. EFW was calculated using the Hadlock's formula with 3 parameters (biparietal diameter, abdominal circumference...

article

The single water‐surface sweep estimation method accurately estimates very low (n = 4) to low–moderate (n = 25–100) and high (n > 100) Aedes aegypti (Diptera: Culicidae) pupae numbers in large water containers up to 13 times faster than the exhaustive sweep and total count method and without any sediment contamination

C. M. Romero‐Vivas, H. Llinás, A. K. Falconar

Tropical Medicine & International Health > 20 > 3 > 326 - 333

ObjectiveTo confirm that a single water‐surface sweep‐net collection coupled with three calibration factors (2.6, 3.0 and 3.5 for 1/3, 2/3 and 3/3 water levels, respectively) (WSCF) could accurately estimate very low to high Aedes aegypti pupae numbers in water containers more rapidly than the exhaustive 5‐sweep and total count (ESTC) method recommended by WHO. MethodsBoth methods were compared in...

article

Simulation-based estimation of environmental pollutions from construction processes

Hong Zhang, Dong Zhai, Ying Nan Yang, H. Zhang, more

Journal of Cleaner Production > 2014 > 76 > Complete > 85-94

Construction processes may produce environmental pollutions, such as noise and emissions of greenhouse gas and air pollutants that are studied in the paper, and estimation of them is essential to planning the construction process regarding pollution-reduction. Based on the calculating models developed from the EPA NONROAD model and the noise theory, a discrete-event simulation method is developed...

article

Adjusting the HIV prevalence for non‐respondents using mortality rates in an open cohort in northwest Tanzania

Filemon Tenu, Raphael Isingo, Basia Zaba, Mark Urassa, more

Tropical Medicine & International Health > 19 > 6 > 656 - 663

ObjectiveTo estimate HIV prevalence in adults who have not tested for HIV using age‐specific mortality rates and to adjust the overall population HIV prevalence to include both tested and untested adults. MethodsAn open cohort study was established since 1994 with demographic surveillance system (DSS) and five serological surveys conducted. Deaths from Kisesa DSS were used to estimate mortality rates...

article

Intra-individual variability in adult age-at-death estimates using incremental lines in dental cementum

L. Lanteri, A. Schmitt, B. Foti

BMSAP > 2014 > 26 > 1-2 > 23-33

The reliability of adult age-at-death estimates based on counting the incremental lines in dental cementum is uncertain because their accuracy and precision vary from one study to another. Moreover, no previous study has addressed intra-individual variability in counts of incremental lines in cementum. We quantified this variability from a sample of 51 clinically extracted teeth of 15 individuals...

article

A review on lithium-ion battery ageing mechanisms and estimations for automotive applications

Anthony Barré, Benjamin Deguilhem, Sébastien Grolleau, Mathias Gérard, more

Journal of Power Sources > 2013 > 241 > Complete > 680-689

Lithium-ion batteries have become the focus of research interest, thanks to their numerous benefits for vehicle applications. One main limitation of these technologies resides in the battery ageing. The effects of battery ageing limit its performance and occur throughout their whole life, whether the battery is used or not, which is a major drawback on real usage. Furthermore, degradations take place...

article

Comparaison des méthodes d’estimation d’un paramètre quantitatif : évaluation de la concordance

Nicolas Rognant, Justine Bacchetta, Laurent Juillard

Nephrologie & Therapeutique > 2013 > 9 > 2 > 92-97

De nombreux paramètres quantitatifs cliniques, biologiques et radiologiques sont utiles en médecine afin d’orienter le diagnostic et la thérapeutique. Le néphrologue doit utiliser fréquemment ces paramètres, notamment pour évaluer la fonction rénale. Pour que les méthodes de mesure de ces paramètres soient utilisées en pratique clinique, il est nécessaire d’établir la concordance entre les valeurs...

article

Applying Relational Models to the Graduation of Disability Schedules

Alan Marshall, Paul Norman, Ian Plewis

European Journal of Population > 2013 > 29 > 4 > 467-491

Age-specific rates of particular disability types are important for planning purposes and are a valuable input to estimates and projections of populations with different disabilities. However, survey estimates of schedules of disability rates display evidence of sampling variability and sub-national disability schedules are often unavailable for reasons of disclosure protection. This paper develops...

article

Diagrammes fondamentaux de zone : estimation et influence de la régulation

T. Courbon, L. Leclercq

Recherche Transports Sécurité > 2012 > 28 > 3-4 > 201-214

Résumé Les diagrammes fondamentaux de zone sont des outils de modélisation dynamique du trafic routier à une échelle agrégée. Ils permettent l’évaluation des stratégies de gestion du trafic à l’échelle d’une agglomération tout en permettant la prise en compte de la congestion, un phénomène que les modèles habituellement utilisés à cette échelle intègrent mal. Cependant, l’estimation et le calibrage...

article

Modelling Short‐Scale Variability and Uncertainty During Mineral Resource Estimation Using a Novel Fuzzy Estimation Technique

Khan Muhammad, Hylke J. Glass

Geostandards and Geoanalytical Research > 35 > 3 > 369 - 385

For mineral resource assessment, techniques based on fuzzy logic are attractive because they are capable of incorporating uncertainty associated with measured variables and can also quantify the uncertainty of the estimated grade, tonnage etc. The fuzzy grade estimation model is independent of the distribution of data, avoiding assumptions and constraints made during advanced geostatistical simulation,...

article

3D geometric morphometrics and missing-data. Can extant taxa give clues for the analysis of fossil primates?

Sébastien Couette, Jess White

Comptes rendus - Palevol > 2010 > 9 > 6-7 > 423-433

Geometric morphometric methods constitute a powerful and precise tool for the quantification of morphological differences. The use of geometric morphometrics in palaeontology is very often limited by missing data. Shape analysis methods based on landmarks are very sensible but until now have not been adapted to this kind of dataset. To analyze the prospective utility of this method for fossil taxa,...

article

L’outil « estimateur », la ligne numérique mentale et les habiletés arithmétiques

B. Vilette, C. Mawart, S. Rusinek

Pratiques psychologiques > 2010 > 16 > 2 > 203-214

Cette recherche présente les effets d’un entraînement qui utilise l’outil « Estimateur » pour exercer les opérations d’addition et de soustraction à des enfants de dix à 11 ans présentant des troubles du calcul. L’outil « Estimateur » est conçu pour mettre en relation les représentations analogiques de la ligne numérique mentale (estimation du résultat des additions et des soustractions) avec les...

article

Analyse de mouvement : une revue

S. Laguitton, C. Toumoulin

IRBM > 2009 > 30 > 2 > 72-84

L’analyse des séquences temporelles d’images a fait l’objet de nombreux travaux depuis plus de 20 ans. Elle permet d’accéder à des informations importantes sur les objets contenus dans les scènes observées que ce soit à des fins de détection, d’estimation, de suivi ou de reconnaissance. Elle conduit aussi à de nombreuses applications dans des domaines très divers allant de la télévision à la météorologie,...

article

Version etendue du filtre de Kalman discret appliquee a un probleme inverse de conduction de chaleur non lineaire

Revue Generale de Thermique > 2000 > 39 > 2 > 191-212

A nonlinear inverse heat conduction problem is resolved by using a formulation of the Kalman filter based on a statistical approach and extended to nonlinear systems. The time evolution of a surface heat flux density is reconstructed from a numerical simulation which allowed us to analyse the influence of some parameters, that condition the running of the filter, on the estimation result. A suitable...

article

Version etendue du filtre de Kalman discret appliquee a un probleme inverse de conduction de chaleur non lineaire

Naouel Daouas, Mohamed-Sassi Radhouani

International Journal of Thermal Sciences > 2000 > 39 > 2 > 191-212

Un probleme inverse de conduction de la chaleur non lineaire est resolu en utilisant une formulation du filtre de Kalman basee sur une approche statistique et etendue aux systemes non lineaires. L'evolution temporelle d'une densite de flux de chaleur surfacique a ete reconstruite a partir d'une simulation numerique qui nous a permis d'etudier l'influence de certains parametres qui conditionnent le...

article

Estimating the effects of trade agreements: Lessons from 60 years of methods and data

Mario Larch, Yoto V. Yotov

The World Economy > 47 > 5 > 1771 - 1799

Starting with Tinbergen (1962, Shaping the world economy: Suggestions for an international economic policy, The Twentieth Century Fund), quantifying the effects of regional trade agreements (RTAs) on international trade flows has always been among the most popular topics in the trade literature. Also not surprisingly, to estimate the effects of RTAs, most researchers and policy analysts have relied...

article

A class of computational methods to reduce selection bias when designing Phase 3 clinical trials

Tianyu Zhan

Statistics in Medicine > 43 > 10 > 1993 - 2006

When designing confirmatory Phase 3 studies, one usually evaluates one or more efficacious and safe treatment option(s) based on data from previous studies. However, several retrospective research articles reported the phenomenon of “diminished treatment effect in Phase 3” based on many case studies. Even under basic assumptions, it was shown that the commonly used estimator could substantially overestimate...

article

H_∞ dynamic observer design for a class of Lipschitz nonlinear discrete‐time systems with time varying delays

Ghali Naami, Mohamed Ouahi

Optimal Control Applications and Methods > 45 > 2 > 893 - 914

This study explores the development of

H_{\infty}

dynamic observer (HDO) for discrete‐time nonlinear systems (DTNLS) with time‐varying delay (TVD) and disturbances. The approach is to construct an augmented Lyapunov–Krasovskii function (LKF) with double summation terms, using the generalized reciprocally convex matrix inequality (GRCMI), as well as the Jensen‐based inequality (JBI) and...

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Wybrane zagadnienia modelowania matematyczno-statystycznego struktur i procesów przestrzennych

Estimation of Wind Drift and Evaporation Losses from Sprinkler Irrigation systemS by Different Data‐Driven Methods

Performance de l’échographie dans l’estimation du poids fœtal à terme

Simulation-based estimation of environmental pollutions from construction processes

Adjusting the HIV prevalence for non‐respondents using mortality rates in an open cohort in northwest Tanzania

Intra-individual variability in adult age-at-death estimates using incremental lines in dental cementum

A review on lithium-ion battery ageing mechanisms and estimations for automotive applications

Comparaison des méthodes d’estimation d’un paramètre quantitatif : évaluation de la concordance

Applying Relational Models to the Graduation of Disability Schedules

Diagrammes fondamentaux de zone : estimation et influence de la régulation

Modelling Short‐Scale Variability and Uncertainty During Mineral Resource Estimation Using a Novel Fuzzy Estimation Technique

3D geometric morphometrics and missing-data. Can extant taxa give clues for the analysis of fossil primates?

L’outil « estimateur », la ligne numérique mentale et les habiletés arithmétiques

Analyse de mouvement : une revue

Version etendue du filtre de Kalman discret appliquee a un probleme inverse de conduction de chaleur non lineaire

Version etendue du filtre de Kalman discret appliquee a un probleme inverse de conduction de chaleur non lineaire

Estimating the effects of trade agreements: Lessons from 60 years of methods and data

A class of computational methods to reduce selection bias when designing Phase 3 clinical trials

H_∞ dynamic observer design for a class of Lipschitz nonlinear discrete‐time systems with time varying delays

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