منابع مشابه
The effect of hand and mute on the impedance spectra of the horn
The effects of different horn players’ hand shapes and positions, and the effects of different mutes were quantified by the input impedance spectrum Z and related to players’ and listeners’ perceptions. Z was measured using a three microphone, two calibration technique for combinations of a horn with three different hands, four different practice mutes and representative fingerings, complete fo...
متن کاملOn Approximate Horn Minimization
The minimization problem for Horn formulas is to find a Horn formula equivalent to a given Horn formula, using a minimum number of clauses. A 2 1−ǫ(n)-inapproximability result is proven, which is the first non-trivial inapproximability result for this problem. We also consider several other versions of Horn minimization. The more general version which allows for the introduction of new variable...
متن کاملOn Approximate Horn Formula Minimization
The minimization problem for Horn formulas is to find a Horn formula equivalent to a given Horn formula, using a minimum number of clauses. A 2 1−ǫ(n)-inapproximability result is proven, which is the first inapproximability result for this problem. We also consider several other versions of Horn minimization. The more general version which allows for the introduction of new variables is known t...
متن کاملHorn Complements: Towards Horn-to-Horn Belief Revision
Horn-to-Horn belief revision asks for the revision of a Horn knowledge base such that the revised knowledge base is also Horn. Horn knowledge bases are important whenever one is concerned with efficiency—of computing inferences, of knowledge acquisition, etc. Horn-to-Horn belief revision could be of interest, in particular, as a component of any efficient system requiring large commonsense know...
متن کاملRFI subtraction from time-averaged spectroscopy using a reference horn and cross power spectra
Effective radio frequency interference (RFI) cancellation for spectroscopic applications can take place using time averaged spectra. An RFI “reference signal,” constructed from the cross power spectrum of the signals from the two polarizations of a reference horn pointed at the source of the RFI signal, in combination with cross power spectra with the signals from the Parkes telescope, allows c...
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ژورنال
عنوان ژورنال: Theoretical Computer Science
سال: 1991
ISSN: 0304-3975
DOI: 10.1016/0304-3975(91)90227-s