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  • Some mathematical models for permafrost
  • Géographie physique ; Modèle ; Modèle mathématique ; Permafrost ; Périglaciaire ; Température ; Thermokarst ; URSS ; Zone froide
  • of thermokarst are analyzed. In this paper the mathematical models of these problems, computer programs for the models and some numerical calculations for concrete objects and districts are suggested.
  • A review of fundamental new results in mathematical theory of geocryological problems obtained in the Institute of Mechanics in Moscow State University. The problems of temperature regime and phase state of permafrost, formation and evolution
  • The study of complexity-some ideas from mathematical modelling in Climatological extremes in the mountains, Physical background, geomorphological and ecological consequences.
  • Analyse de système ; Généralités sur la géographie ; Modèle mathématique ; Système ; Théorie
  • One of the simple lessons from mathematical modelling is that complex behaviour need not have a complex cause. The A. tries to demonstrate this point by elaborating on some of these novel mathematical ideas, described under the headings catastrophes
  • Spatial mathematical modeling and regional science
  • Expansion method ; Mathematics ; Modelling ; Regional science ; Spatial analysis
  • Physical principles of climate mathematical modelling
  • Atmospheric circulation ; Climate ; Climatic variability ; Forecast ; Global change ; Human impact ; Mathematical model ; Model
  • Action anthropique ; Changement global ; Circulation atmosphérique ; Climat ; Modèle ; Modèle mathématique ; Prévision ; Variabilité climatique
  • In this paper the nature, state and variability of the climate system are described briefly. Of particular importance in open systems such as components of the climatic system is feedback. Mathematical models provide a new way to not only understand
  • Ein mathematisches Okosystemmodell für eutrophe Flachgewässer. (A mathematical ecosystem model of eutrophic shallow lakes)
  • Allemagne de l'Est ; Berlin ; Ecologie appliquée ; Ecosystème ; Eutrophisation ; Géographie physique ; Lac ; Milieu dulçaquatique ; Modèle ; Pollution ; Qualité de l'eau
  • In order to allow forecasting and control of water quality, a mathematical ecosystem model has been set up for shallow lakes of Berlin.
  • A review of mathematical models of river planform changes
  • Bangladesh ; Bank erosion ; Fluvial processes ; Longitudinal section ; Mathematical model ; Meander ; Model ; River bed ; Simulation ; Stream
  • Bangladesh ; Cours d'eau ; Erosion des berges ; Fluviatile ; Lit fluvial ; Modèle ; Modèle mathématique ; Méandre ; Profil longitudinal ; Simulation
  • The A. discusses a two-dimensional depth-averaged model, various meander models and a model for the braided Brahmaputra-Jamuna River in Bangladesh. Emphasis is placed on the need for future research rather than on model applications. The models help
  • Developments in mathematical programming models and their impact on the spatial allocation of educational resources
  • Allocation spatiale ; Bibliographie ; Carte scolaire ; Education ; Généralités sur la géographie ; Mathématique ; Modèle ; Modèle de localisation-allocation ; Optimisation ; Programmation linéaire ; Programmation mathématique
  • A CO-climate sensitivity study with a mathematical model of the global climate
  • Climatologie ; Dioxyde de carbone ; Effet de serre ; Géographie physique ; Modèle ; Modèle mathématique ; Réchauffement
  • A review and classification of the existing models of cyanobacteria
  • Biogeography ; Classification ; Lake ; Mathematical model ; Model ; Neural network ; Stream
  • Biogéographie ; Classification ; Cours d'eau ; Cyanobactérie ; Lac ; Modèle ; Modèle mathématique ; Réseau neural
  • . Two major groups emerge : deterministic mathematical and artificial neural network models.
  • Modelling of cyanobacteria in freshwaters is an important tool for understanding their population dynamics and predicting bloom occurence in lakes and rivers. In this paper existing key models of cyanobacteria are reviewed, evaluated and classified
  • Choice of mathematical models in geographic research considering alternatives.
  • This Ph. D. thesis is a first attempt to explore the gap between mathematics and geography. The human geographer or social scientist usually speaks a different language than the mathematician. Concepts such as entropy, diffusion and allometry play
  • a great role in this study. The idea that various alternatives should be compared before making a choice of a model forms a critical theme. - (AGD)
  • A mathematical model to simulate rainfall erosion
  • Erosion, transport and deposition processes. Theories and models.
  • Agropedology ; Mathematical model ; Model ; Precipitation ; Rainfall simulation ; Slope gradient ; Soil conservation ; Soil erosion ; Soil properties
  • Agropédologie ; Conservation des sols ; Erosion des sols ; Modèle ; Modèle mathématique ; Pente de versant ; Propriété du sol ; Précipitation ; Simulation de pluie
  • The soil erosion model presented in this paper is based predominantly on general physical principles. The model parameters are related directly to measurable soil, slope and rainfall properties. Both the erosion and the deposition of the soil
  • Sedimentation in the Cachi reservoir illustrated by mathematical modelling
  • Catchment area;Watershed ; Costa Rica ; Dam ; Hydraulic works ; Mathematical model ; Model ; Sedimentation ; Suspended load ; Turbidity
  • Aménagement hydraulique ; Barrage-réservoir ; Bassin-versant ; Charge en suspension ; Costa Rica ; Modèle ; Modèle mathématique ; Sédimentation ; Turbidité
  • Short summary of the theoretical considerations behind the model, a presentation of background data from the Cachí reservoir, and an application of the model on the Cachí reservoir. Thus the results are based on a theoretical model that is adapted
  • A mathematical model for scheduling screening tests for progressive diseases
  • Calcul économique ; Coût social ; Dépistage ; Etats-Unis ; Géographie humaine ; Maladie évolutive ; Modèle mathématique ; Radiographie ; Santé ; Services de santé ; Technique de soins
  • Tendencies in the development of mathematical modelling of human migration in Population and settlement structure. Analytical and policy approaches.
  • Histoire des modèles migratoires depuis le milieu du XIX siècle.
  • The scale in the mathematical modelling of geoecosystems
  • Concept ; Ecosystem ; Geo-ecology ; Geosystem ; Mathematical model ; Methodology ; Model ; Spatial scale
  • Concept ; Echelle spatiale ; Ecosystème ; Géo-écologie ; Géo-écosystème ; Géosystème ; Modèle ; Modèle mathématique ; Méthodologie
  • The article presents methodological concepts and definitions as regards different scales, as well as their magnitudes in relation to the study and modelling of geoecosystems. The particular subject being considered is the geoecosystem
  • Public sector projects in a mathematical modeling course
  • Use of mathematical models to generate alternative solutions to water resources planning problems
  • Thermomechanical mathematical model of the formation of the structure and properties of snowpack
  • Avalanche ; Géographie physique ; Modèle ; Neige ; Propriété physique ; Prévision ; Thermodynamique
  • The model allows to estimate the time and the position of forming of the depth hoar strates and allows to calculate the snow strength in different layers of snowpack and the variation of snow strength in the process of metamorphism. The suggested
  • thermomechanical model of the snowpack structure formation allows to decide the important problem of the avalanche alarm prognosis with using of the experimental meteo-data from the snow-avalanches station.
  • Mathematical modelling of recent sedimentology in the shallow waters along the Belgian coast in Ecohydrodynamics.
  • Belgique ; Dragage ; Ecosystème ; Géographie de l'Europe ; Littoral ; Modèle ; Modèle mathématique ; Prévision ; Sédiment ; Sédimentologie
  • Evaluation, by a simulation with mathematical models of physical phenomena, of the impact of the foreseen maximum winning of sand and gravel on the coastal ecosystem. The present official authorizations for winning operations are valid 3 years
  • A mathematical model of segregation patterns in residential neighbourhoods
  • Housing market ; Mathematics ; Model ; Segregation ; Social group ; Urban district
  • Groupe social ; Marché du logement ; Mathématique ; Modèle ; Quartier ; Ségrégation
  • Les AA. proposent un modèle mathématique qui décrit la dynamique et les distributions spatiales de deux groupes de populations, où la migration est impulsée par le statut socio-économique. La ségrégation est associée à des instabilités par rapport à