A complexity-driven framework for waveform tomography with discrete adjoints
نویسندگان
چکیده
منابع مشابه
Discrete Tomography: Algorithms and Complexity
The workshop, organized by P. Gritzmann (Trier), and M. Nivat (Paris), was attended by 20 participants from 5 countries (7 nationalities). It was a workshop in the very sense of the word, without a fixed formal schedule, many of the talks were spontaneous and informal presentations at the black board, and the discussion of ideas and new approaches in discrete tomography was central. The basic p...
متن کاملA discrete-event optimization framework for mixed-speed train timetabling problem
Railway scheduling is a complex task of rail operators that involves the generation of a conflict-free train timetable. This paper presents a discrete-event simulation-based optimization approach for solving the train timetabling problem to minimize total weighted unplanned stop time in a hybrid single and double track railway networks. The designed simulation model is used as a platform for ge...
متن کاملAnalysis of Discrete Adjoints for Upwind Numerical Schemes
This paper discusses several aspects related to the consistency and stability of the discrete adjoints of upwind numerical schemes. First and third order upwind discretizations of the one-dimensional advection equation are considered in both the finite difference and finite volume formulations. We show that the discrete adjoints may lose consistency and stability near the points where upwinding...
متن کاملContinuous and Discrete Adjoints to the Euler Equations for Fluids
Adjoints are used in optimization to speed-up computations, simplify optimality conditions or compute sensitivities. Because time is reversed in adjoint equations with first order time derivatives, boundary conditions and transmission conditions through shocks can be difficult to understand. In this article we analyze the adjoint equations that arise in the context of compressible flows governe...
متن کاملImage warping waveform tomography
Imaging the change in physical parameters in the subsurface requires an estimate of the long wavelength component of the same parameters in order to reconstruct the kinematics of the waves propagating in the subsurface. The model is unknown and must be estimated from the same data. One can try to reconstruct the method by matching the recorded data with modeled waveforms extrapolated in a trial...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2020
ISSN: 0956-540X,1365-246X
DOI: 10.1093/gji/ggaa349