On stormier lakes, they made stronger bases for the pilings by placing square log frames on the lake bottom.

By using the methods of least square and minimum entropy deconvolution to process the well-log, the effect of well and wall rocks can be removed, so that the thickness of each layer can be determined.

We introduce an optimally-modified log spectral amplitude estimator, which minimizes the mean-square error of the log spectra for speech signals under signal presence uncertainty.