TY - GEN

T1 - Multi-dimensional predictive analytics for risk estimation of extreme events

AU - Raghupathi, L.

AU - Randell, D.

AU - Ross, E.

AU - Ewans, K.C.

AU - Jonathan, P.

N1 - Export Date: 18 April 2019

PY - 2016/12/19

Y1 - 2016/12/19

N2 - Modelling rare or extreme events is critical in many domains, including financial risk, computer security breach, network outage, corrosion and fouling, manufacturing quality and environmental extremes such as floods, snowfalls, heat-waves, seismic hazards and meteorological-oceanographic events like extra-tropical storms, hurricanes and typhoons. Statistical modelling enables us to understand extremes and design mechanisms to prevent their occurrence and manage their impact. Extreme events are challenging to characterise as they are, by definition, rare and unusual even in a big data world. The frequency and extent of extreme events is typically driven by both primary attributes (dependent variables) and secondary attributes (independent variables or covariates). Studies have shown that improved inference can be gained from including covariate effects in predictive models but this inclusion comes at a heavy computation cost. In this paper, we present a framework for risk estimation from extreme events that are non-stationary, i.e., they are dependent on multi-dimensional covariates. The approach is illustrated by estimation of offshore structural design criteria in a storm environment non-stationary with respect to storm direction, season and geographic location. The framework allows consistent assessment of structural reliability with thorough uncertainty quantification. The model facilitates estimation of risk for any combination of covariates, which can be exploited for improved understanding and ultimately optimal marine structural design. The computational burden incurred is large, especially since thorough uncertainty quantification is incorporated, but manageable using slick algorithms for linear algebraic manipulations and high-performance computing. © 2016 IEEE.

AB - Modelling rare or extreme events is critical in many domains, including financial risk, computer security breach, network outage, corrosion and fouling, manufacturing quality and environmental extremes such as floods, snowfalls, heat-waves, seismic hazards and meteorological-oceanographic events like extra-tropical storms, hurricanes and typhoons. Statistical modelling enables us to understand extremes and design mechanisms to prevent their occurrence and manage their impact. Extreme events are challenging to characterise as they are, by definition, rare and unusual even in a big data world. The frequency and extent of extreme events is typically driven by both primary attributes (dependent variables) and secondary attributes (independent variables or covariates). Studies have shown that improved inference can be gained from including covariate effects in predictive models but this inclusion comes at a heavy computation cost. In this paper, we present a framework for risk estimation from extreme events that are non-stationary, i.e., they are dependent on multi-dimensional covariates. The approach is illustrated by estimation of offshore structural design criteria in a storm environment non-stationary with respect to storm direction, season and geographic location. The framework allows consistent assessment of structural reliability with thorough uncertainty quantification. The model facilitates estimation of risk for any combination of covariates, which can be exploited for improved understanding and ultimately optimal marine structural design. The computational burden incurred is large, especially since thorough uncertainty quantification is incorporated, but manageable using slick algorithms for linear algebraic manipulations and high-performance computing. © 2016 IEEE.

KW - Covariates

KW - Large-scale extremes

KW - Statistical modelling

KW - Uncertainty quantification

KW - Big data

KW - Hurricanes

KW - Offshore structures

KW - Predictive analytics

KW - Risk assessment

KW - Security of data

KW - Statistical methods

KW - Storms

KW - Structural design

KW - Structural optimization

KW - Uncertainty analysis

KW - High performance computing

KW - Independent variables

KW - Manufacturing quality

KW - Structural reliability

KW - Uncertainty quantifications

KW - Risk perception

U2 - 10.1109/HiPCW.2016.017

DO - 10.1109/HiPCW.2016.017

M3 - Conference contribution/Paper

SP - 60

EP - 69

BT - 2016 IEEE 23rd International Conference on High Performance Computing Workshops (HiPCW)

PB - IEEE

ER -