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Thursday, June 22 • 5:21pm - 5:33pm
Solving Geophysical Inverse Problems with the jInv.jl Framework: Seeing Underground with Julia

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Geophysical inversion is the mathematical and computational process of estimating the spatial distribution of physical properties of the earth's subsurface from remote measurements. It's a key tool in applied geophysics, which is generally concerned with determining the structure and composition of the earth's interior without direct sampling. At JuliaCon 2017 I would like to discuss our group's efforts to develop a modular, scalable, and extensible framework for solving geophysical inverse problems and other partial differential equation (PDE) constrained parameter estimation problems in Julia.solve PDE constrained parameter estimation problems we need advanced algorithms for optimization, for the solution of PDEs, and the ability to efficiently share information between these domains. Our framework, called jInv---short for JuliaInversion---provides modular building block routines for these tasks that allow users to easily write their own software to solve new problems. The framework heavily uses Julia's multiple dispatch to allow for extensibility and generic programming.is also critical that software implementations of these algorithms can scale to large distributed computing systems. jInv allows users to exploit the parallelism in geophysical inverse problems without detailed knowledge of Julia's parallel computing constructs.first main goal of my talk is to discuss our approach to exploiting parallelism in geophysical inverse problems and how it has been implemented in jInv. The second goal is to illustrate, through examples of developing jInv modules for new geophysical problems, how we've moved jInv from a research project for the benefit of our own group to a tool that can be of use to the wider community.


Speakers
PB

Patrick Belliveau

Ph.D. student, University of British Columbia
Hi! I'm a Ph.D. student in the department of Earth, Ocean and Atmospheric Sciences at the University of British Columbia in Vancouver Canada. Academically I'm interested in developing new computational methods for solving geophysical imaging problems. Since coming to UBC Julia ha... Read More →


Thursday June 22, 2017 5:21pm - 5:33pm
West Pauley Pauley Ballroom, Berkeley, CA