The only maintenance required is changing the prefilter cartridge twice a year.
2.
To speed up linear search, a compressed version of the feature vectors stored in RAM is used to prefilter the datasets in a first run.
3.
HHblits uses the same HMM-HMM alignment algorithms as HHsearch, but it employs a fast prefilter that reduces the number of database HMMs for which to perform the slow HMM-HMM comparison from tens of millions to a few thousands.
4.
Each SBGT train generally consists of a mist eliminator / roughing filter; an electric heater; a prefilter; two absolute ( HEPA ) filters; an activated charcoal filter; an exhaust fan; and associated valves, ductwork, dampers, instrumentation and controls.
5.
If it is converted into PostScript data an additional filter is applied called a " prefilter ", which runs the PostScript data through another PostScript converter so that it can add printer specific options like selecting page ranges to print, setting " n "-up mode and other device-specific things.
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