sigmoid

Shaped like S

Sigmoid describes an S-shaped curve or structure.

In anatomy, the sigmoid colon is the S-curved section of the large intestine before the rectum.

In mathematics and machine learning, a sigmoid function produces an S-shaped curve that maps any input to a value between 0 and 1, making it useful for modeling probabilities: The neural network uses a sigmoid activation function.

anatomy

colon

Large intestine section

digestive · abdominal · diverticulitis · colonoscopy · peristalsis · gastrointestinal · descending · iliac · rectum · mesentery

mathematical

function

Purpose or duty

graph · derivative · integral · limit · tangent · slope · calculus · plot · axis · coordinate

neural-network

activation

Setting into operation

perceptron · weights · bias · gradient · classification · binary · regression · probability · output · threshold

biology

receptor

Signal-receiving molecule

inhibition · kinase · phosphorylation · dose-response · saturation · binding · ligand · regulatory

shape

S-curve

Two opposing consecutive bends

S-shaped · undulating · winding · flexed · arched · ogee · sweeping

growth

S-curve

Two opposing consecutive bends

proliferation · plateau · maturation · asymptotic

Opposites
curvature shape

sigmoidstraight

Not curved or crooked

linear · rectilinear · angular · jagged · zigzag

mathematical function behavior

sigmoidstep function

Piecewise constant graph

unbounded · discontinuous · exponential · sawtooth · linear

Family

sigmoidoscopy, sigmoidal, sigmoidoscope, sigmoids

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