A combined weight window and biasing approach based on a subspace importance map in the Monte Carlo simulation of a gamma-gamma lithodensity logging tool response with the revised McLDL code
作者： Q. Ao , R.P. Gardner , K. Verghese
DOI: 10.1109/NSSMIC.1994.474469
关键词:
摘要: A combined weight window and biasing approach has been developed to optimize the specific purpose McLDL code for simulating spectral response of gamma-gamma lithodensity logging tools. The method is based on use photon importance maps which are strongly dependent upon geometric configuration tool. subspace in formation taken as an region a one-group generator used conjunction with current code. splitting only occurs within important subspace, direction exponential transform applied drive photons into that or detector. tested theoretical benchmark problem Atlas Wireline Services' commercial Compared results from previous code, this new eliminated unacceptably large fluctuations substantially improved code's performance computational accuracy efficiency. >
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