Search results for "Stochastic gradient treeboost"

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Binary logistic regression versus stochastic gradient boosted decision trees in assessing landslide susceptibility for multiple-occurring landslide e…

2015

This study aims to compare binary logistic regression (BLR) and stochastic gradient treeboost (SGT) methods in assessing landslide susceptibility within the Mediterranean region for multiple-occurrence regional landslide events. A test area was selected in the north-eastern sector of Sicily (southern Italy) where thousands of debris flows and debris avalanches triggered on the first October 2009 due to an extreme storm. Exploiting the same set of predictors and the 2009 event landslide archive, BLR- and SGT-based susceptibility models have been obtained for the two catchments separately, adopting a random partition (RP) technique for validation. In addition, the models trained in one catchm…

Atmospheric ScienceSettore GEO/04 - Geografia Fisica E GeomorfologiaStormLandslideRegression analysisOverfittingForward logistic regressionLandslide susceptibilityDebris flowPrediction spatial transferabilityAltitudeMessina 2009 disasterNatural hazardEarth and Planetary Sciences (miscellaneous)Alternating decision treePhysical geographyStochastic gradient treeboostCartographySicilyGeologyWater Science and Technology
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OPTIMIZING STOCHASTIC SUSCEPTIBILITY MODELLING FOR DEBRIS FLOW LANDSLIDES: MODEL EXPORTATION, STATISTICAL TECHNIQUES COMPARISON AND USE OF REMOTE SEN…

Il presente lavoro di ricerca è stato sviluppato al fine di approfondire approcci metodologici nell'ambito della sucscettibilità da frana. In particolare, il tema centrale della ricerca è rappresentato dal tema specifico dell'esportazione spaziale di modelli di suscettibilità nell'area mediterranea. All'interno del topic specifico dell'esportazione di modelli predittivi spaziali sono state approfondite tematiche relative all'utilizzo di differenti algoritmi o di differenti sorgenti, derivate da DEM o da coperture satellitari. The present work has been developed in order to enhance current methodological approaches within the big picture of the landslide susceptibility. In particular, the ce…

Landslide Susceptibility. Predictive modeling. Remote sensing. ASTER. Stochastic Gradient Treeboost. Binary Logistic Regression. Maximum Entropy. Presence-only approach. Presence-absence approach. Geomorphology. Engineering Geomorphology. Engineering Geology. Spatial Analysis.Settore GEO/04 - Geografia Fisica E Geomorfologia
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