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Neural network learning apparatus and method

  • US 5,276,769 A
  • Filed: 08/06/1992
  • Issued: 01/04/1994
  • Est. Priority Date: 03/13/1989
  • Status: Expired due to Fees
First Claim
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1. A learning apparatus for teaching a neural network, including a plurality of input nodes and a plurality of output nodes, each of the plurality of output nodes representing a class with a different meaning, said learning apparatus comprising:

  • initialization means for providing an input learning vector to the plurality of input nodes of said neural network, said neural network applying a weighting vector to the input learning vector to produce an initial output learning vector at the plurality of output nodes;

    first classifying means including,first selecting means for selecting two of the plurality of output nodes with a first and second largest value,first detecting means for detecting if the selected output node with the first largest value represents the class to which the input learning vector belongs, andweight adjusting means for adjusting the weighting vector if the selected output node with the first largest value does not represent the class to which the input learning vector belongs wherein the adjusted weighting vector is applied to the input learning vector to produce an adjusted output learning vector at the plurality of output nodes, said weight adjusting means adjusting the weighting vector until the first largest value represents the class to which the input vector belongs; and

    second classifying means including,second selecting means for selecting the two of the plurality of output nodes with the first and second largest values,second detecting means for detecting if the selected output node with the first largest value represents the class to which the input learning vector belongs,ratio calculating means for calculating a ratio of the first largest value to the second largest value if the first largest value represents the class to which the input learning vector belongs, andratio increasing mean for increasing the ratio of the first largest value to the second largest value if the ratio is within a predetermined range.

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