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Par Collection- Bibliographie Géographique Internationale (8744)
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- Skew productivity distributions and agglomeration : evidence from plant-level Data
- Centre-périphérie ; Composition industrielle ; Distribution statistique ; Economie d'agglomération ; Efficacité économique ; Industrie ; Japon ; Productivité ; Statistique ; Usine
- Core-periphery ; Economic efficiency ; Factory ; Industry ; Japan ; Productivity ; Statistical distribution ; Statistics
- This paper empirically examines how the shapes of plant productivity distributions vary across regions based on Japan's manufacturing census. It focuses on the skewness to examine the asymmetry by estimating the gamma distribution at the plant level
- . By linking the estimated shape parameters with economic geography variables, it is found that the productivity distribution tends to be significantly left skewed, especially in cores, regions with diversified industrial compositions, regions with weak market
- The use of grain-size distribution patterns to elucidate aeolian processes on a transverse dune of Thar Desert, India
- Distribution statistique ; Domaine aride ; Dune ; Désert ; Eolien ; Granulométrie ; Inde ; Modèle ; Rājasthān ; Transport éolien
- Aeolian features ; Aeolian transport ; Arid area ; Desert ; Dune ; Grain size distribution ; India ; Model ; Rajasthan ; Statistical distribution
- The grain-size distribution of aeolian dune sands in the Thar Desert, India was analyzed and compared with 3 model distributions – log-normal, log-hyberbolic and log-skew-Laplace – to determine the best-fit statistical model. In total, 51 samples
- . It is suggested that the main criteria for the development of a normal distribution is the lack of skewed fractions and the concentration of the narrow, intermediate size fractions in the final grain size distribution.
- Apparent regional skew
- Ajustement ; Analyse spatiale ; Asymétrie ; Crue ; Distribution statistique ; Etats-Unis ; Géographie physique ; Statistique ; Série chronologique ; Variation spatio-temporelle
- Flood frequency analysis with a generalized skew coefficient
- Analyse fréquentielle ; Coefficient d'asymétrie ; Crue ; Distribution ; Débit ; Ecoulement ; Géographie physique ; Méthode Monte Carlo ; Simulation ; Statistique
- The preservation of skewness in linear disaggregation schemes
- (1871-1975) ; Asymétrie ; Distribution ; Débit ; Décomposition linéaire ; Géographie physique ; Hydrologie mathématique ; Hydrologie stochastique ; Nil ; Processus ARMA ; Processus aléatoire ; Statistique
- An operational approach to preserving skew in hydrologic models of long-term persistence
- Bruit gaussien fractionnaire ; Distribution gamma ; Distribution log-normale ; Débit ; Ecoulement ; Géographie physique ; Hydrologie mathématique ; Hydrologie stochastique ; Méthodologie ; Persistance ; Phénomène de Hurst ; Processus ARMA
- Deux modèles de persistance à long terme dans les modèles hydrologiques sont présentées: un bruit gaussien fractionnaire et un processus mixte autorégressif et de moyenne mobile ARMA, d'ordre 1. Ils sont appliqués à deux distributions: une
- distribution log-normale à 3paramètres et une distribution gamma à 3paramètres. Discussion des avantages et des inconvénients des modèles appliqués à ces distributions. On ne peut préconiser l'emploi d'aucune de ces distributions asymétriques pratiquement, les
- A probability distribution for crop yields in Poland
- Agroclimatologie ; Changement climatique ; Distribution statistique ; Gradient de densité ; Pologne ; Rendement agricole ; Risque
- Agroclimatology ; Climatic change ; Crop yield ; Density gradient ; Poland ; Risk ; Statistical distribution
- on crop yields reveal that the function of density changed from right-skewed to left-skewed, along with increasing mean yields. A fairly good approximation of the probability distribution for actual yields may be obtained using the log-normal distribution
- Nomothetic geography revisited : statistical distributions, their underlying principles, and inequality measures
- Distribution statistique ; Environnement ; Géographie humaine ; Géographie nomothétique ; Irrégularité ; Société ; Tchèque république
- Czech Republic ; Environment ; Human geography ; Society ; Statistical distribution
- and c1assifcation of the regularities but less to their explanations The performance of selected parametric measures of inequality is tested with respect to data coming from differently skewed distributions. - (EN)
- The paper focuses on some issues related to regularities in the statistical distributions of various social and environmental phenomena. The interest has also been reflected in geography with a lot of activity given to the documentation
- Grain-size distribution patterns of a point bar system in the Usri River, India
- Cours d'eau ; Distribution spatiale ; Erosion des berges ; Granulométrie ; Hydrodynamique ; Inde ; Modèle ; Statistique ; Structure sédimentaire ; West Bengal
- Bank erosion ; Grain size distribution ; Hydrodynamics ; India ; Model ; Sedimentary structure ; Spatial distribution ; Statistics ; Stream ; West Bengal
- Grain-size distribution patterns in a point bar system of the Usri River, India, were critically analysed in the light of log-normal, log-hyperbolic and log-skew-Laplace distribution models. Sand samples were collected from the cross-bedding foreset
- of different sizes of bedform; the aims were to : study whether bedforms heights have any role in grain-size distribution patterns, offer a best-fit statistical model, study the downstream variation of size-sorting in a point bar system, and study the mechanism
- Beach ; Coastal environment ; Coastal sedimentation ; Grain size distribution ; Hawaii ; Palaeo-environment ; Sand ; Spatial variation ; Statistics
- Detailed textural analyses in a carbonate foreshore-backshore coastal environment in Hawaii indicated distinct differences in mean, sorting, skewness, and percent of fines between zones and within zones. The applicability of the traditional
- . Skewed distributions of dimensional properties (width, length and area) suggest that small corries are continually being added to the population, as older ones are enlarged and some eliminated by coalescence and ice sheet erosion. The attainement
- are then reanalysed after transformation. This resistant method is particularly appropriate for exploration in geography where empirical response distributions tend to be skewed and contain outliers. (Ed.).
- applicability, including negatively skewed distributions of iron, bauxite, and phosphate deposits. The estimation of ore reserves occasionally serves the restricted purpose of the commercial evaluation of mining property. Yet, more often such estimates have
- . This model is based upon a rational frequency distribution for the dependence of tonnage on cut-off and average grade. For this purpose the straight lognormal transformation is rejected, and replaced by a logarithmic, three-parameter transformation of wider
- Croissance urbaine ; Distribution de Yule ; Généralités sur la géographie ; Loi de Yule ; Loi de Zipf ; Modèle ; Probabilité ; Processus aléatoire ; Processus de naissance ; Statistique
- , déduit par Yule de la loi qui porte son nom et décrit par un article célèbre de Simon On a class of skew distribution functions, Biometrika, 1955, 42, pp.425-440.
- Aeolian features ; Arid area ; Cluster analysis ; Coastal environment ; Desert ; Discriminant analysis ; Dune ; Grain size distribution ; Gujarat ; India ; Rajasthan ; Sand
- Cluster analysis was carried out on grain size data (mean, median, sorting, kurtosis and skewness) from the dune covered areas in the Thar desert and from the coastal tract of arid Gujarat. Dendrograms prepared based on hierarchical grouping
- Indices granulométriques et lois de distributions
- Grain size distribution ; Methodology ; Sand ; Sediment transport ; Sedimentology ; Skew distribution ; Statistical distribution
- Distribution statistique ; Granulométrie ; Loi asymétrique ; Méthodologie ; Sable ; Sédimentologie ; Transport sédimentaire
- Analyse statistique ; Années 1980-2010 ; Climatologie ; Distribution spatiale ; Donnée climatique ; Etats-Unis ; Orage ; Précipitation ; Variabilité climatique
- Climatic data ; Climatic variability ; Climatology ; Precipitation ; Rainstorm ; Spatial distribution ; Statistical analysis ; United States of America
- of 4 fundamental distribution characteristics, specifically the mean, standard deviation, skewness, and kurtosis of these precipitation occurrences. Basic statistical storm distribution maps for the USA are therefore presented. The results tend to allow
- Hourly precipitation data were collected from 143 first-order US weather stations during the period from 1980 to 2009 to assess the internal distribution of precipitation events lasting at least 3 hours. Here, the AA. examine the spatial variability
- that the probability distribution of debris thickness changes from positively skewed in the upper glacier towards a more normal distribution nearer the terminus. These observations highlight aspects of spatial and temporal variability in supraglacial debris that may
- require consideration in annual or multi-annual distributed modelling of debris-covered glacier surface energy and mass balance.
- China ; Coastal dynamics ; Coastal environment ; Geostatistics ; Grain size distribution ; Pacific Ocean ; Sediment transport ; Sedimentology ; South China Sea ; Trend surface
- After applying geostatistical analysis to the mean size, sorting and skewness for the sediment samples collected from the eastern Beibu Gulf, the AA. compared the semivariograms of these 3 parameters by using different interpolation distance
- was interpreted as resulting from rapid dispersion rather than deep burial. Travel distances were characterized by right-skewed and heavy-tailed distributions, correctly fitted by a power-law function. This supports the idea that in gravel-bed rivers with abundant