code: def excite(self, currentActivation, inputs):
      
  
      currentActivation += self._minValue + (self._maxValue - self._minValue) / (
                           1 + numpy.exp(-self._steepness * (inputs - self._xMidpoint)))
  
      return currentActivation
docs: Increases current activation by amount.
      @param currentActivation (numpy array) Current activation levels for each cell
      @param inputs            (numpy array) inputs for each cell