"sigmoid" . "S curves" . "many other smooth, analytic approximations" . "S curve" . . . . . "sigmoidally" . "Sigmoidal" . . "Sigmoid" . . "S-curved" . "Sigmoid function" . "Sigmoid function" . "sigmoid shape" . "S-Curve or Sigmoid function" . . "sigmoid function" . "S-shaped tone curve" . "sigmoid curve" . "sigmoid activation function" . . "sigmoidal shape" . "S-shaped curve" . "sigmoidal curve" . "S-like pattern of change" . "sigmoidal" . "S-curve" . "sigmoid-like" . . . "\\\"S\\\" curve" . "s-curve" . "sigmoids" .