Structure
A Boltzmann machine, like a Hopfield network, is a network of units with an "energy" defined for the network. It also has binary units, but unlike Hopfield nets, Boltzmann machine units are stochastic. The global energy, in a Boltzmann machine is identical in form to that of a Hopfield network:
Where:
- is the connection strength between unit and unit .
- is the state, of unit .
- is the threshold of unit .
The connections in a Boltzmann machine have two restrictions:
- . (No unit has a connection with itself.)
- . (All connections are symmetric.)
Often the weights are represented in matrix form with a symmetric matrix, with zeros along the diagonal.
Read more about this topic: Boltzmann Machine
Famous quotes containing the word structure:
“Women over fifty already form one of the largest groups in the population structure of the western world. As long as they like themselves, they will not be an oppressed minority. In order to like themselves they must reject trivialization by others of who and what they are. A grown woman should not have to masquerade as a girl in order to remain in the land of the living.”
—Germaine Greer (b. 1939)
“For the structure that we raise,
Time is with materials filled;
Our to-days and yesterdays
Are the blocks with which we build.”
—Henry Wadsworth Longfellow (1809–1882)
“A committee is organic rather than mechanical in its nature: it is not a structure but a plant. It takes root and grows, it flowers, wilts, and dies, scattering the seed from which other committees will bloom in their turn.”
—C. Northcote Parkinson (1909–1993)