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This paper contributes an open source software - SMIwiz, which integratesseismic modelling, reverse time migration (RTM), and full waveform inversion(FWI) into a unified computer implementation. SMIwiz has the machinery to doboth 2D and 3D simulation in a consistent manner. The package features a numberof computational recipes for efficient calculation of imaging condition andinversion gradient: a dynmaic evolving computing box to limit the simulationcube and a well-designed wavefield reconstruction strategy to reduce the memoryconsumption when dealing with 3D problems. The modelling in SMIwiz runsindependently: each shot corresponds to one processor in a bijective manner tomaximize the scalability. A batchwise job scheduling strategy is designed tohandle large 3D imaging tasks on computer with limited number of cores. Theviability of SMIwiz is demonstrated by a number of applications on benchmarkmodels.

SMIwiz: An integrated toolbox for multidimensional seismic modelling and imaging