The element construction section 13 compares the output value of one or more elements included in the intermediate layer 2 calculated by the output value calculation section 12 with a threshold value and determines whether or not one If any one of the output values of the above elements is larger than the threshold value, the number of elements included in the intermediate layer 2 is maintained, and if all of the output values of one or more elements included in the intermediate layer 2 are not more than the threshold value , The number of elements included in the intermediate layer 2 is increased.
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