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Data envelopment analysis is used to calculate technical, allocative, economic, and scale efficiencies for fields enrolled in the University of Arkansas Rice Research Verification Program. The results reveal most fields have high technical and scale efficiencies, implying inputs are used in minimum levels necessary to achieve given output levels and fields(More)
The well-known principle of the direct torque control applied mainly to squirrel-cage induction motor drives can be generalized and applied to other machines, quantities, converters and systems. These are: other AC machines (double-fed induction and permanent magnet synchronous machine), active and reactive power, direct power control of the line side(More)
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