Mailing List Archive

Date: 2004-06-22T10:00:39
Editor: 68.4.10.228 <>
Wiki: SpamAssassin Wiki
Page: GeneticAlgorithm
URL: http://wiki.apache.org/spamassassin/GeneticAlgorithm

no comment

Change Log:

------------------------------------------------------------------------------
@@ -1,6 +1,7 @@
-SpamAssassin's scores are assigned using a genetic algorithm. See RescoringProcess for details.
+SpamAssassin's scores were assigned using a genetic algorithm in versions up to 3.0.0. A good intro on genetic algorithms can be found here: http://lancet.mit.edu/~mbwall/presentations/IntroToGAs/

-A good intro on genetic algoirthmns can be found here: http://lancet.mit.edu/~mbwall/presentations/IntroToGAs/
+Versions since 3.0.0 are now using a perceptron, written by Henry Stern, to perform the same task (but a lot faster); his program 'implements the "Stochastic Gradient Descent" method of
+training a neural network. It uses a single perceptron with a logsig activation function and maps the weights to SpamAssassin score space.' See the file "masses/README.perceptron" for more details.

+See RescoringProcess for further details.

-''Yes, yes, and RescoringProcess points back here when it mentions the genetic algorithm...can anyone describe how the algorithm itself works?''

Date: 2004-06-22T16:24:33
Editor: DanKohn <dan@dankohn.com>
Wiki: SpamAssassin Wiki
Page: GeneticAlgorithm
URL: http://wiki.apache.org/spamassassin/GeneticAlgorithm

no comment

Change Log:

------------------------------------------------------------------------------
@@ -1,7 +1,7 @@
SpamAssassin's scores were assigned using a genetic algorithm in versions up to 3.0.0. A good intro on genetic algorithms can be found here: http://lancet.mit.edu/~mbwall/presentations/IntroToGAs/

Versions since 3.0.0 are now using a perceptron, written by Henry Stern, to perform the same task (but a lot faster); his program 'implements the "Stochastic Gradient Descent" method of
-training a neural network. It uses a single perceptron with a logsig activation function and maps the weights to SpamAssassin score space.' See the file "masses/README.perceptron" for more details.
+training a neural network. It uses a single perceptron with a logsig activation function and maps the weights to SpamAssassin score space.' See the file "[http://www.spamassassin.org/full/3.0.x/dist/masses/README.perceptron masses/README.perceptron]" for more details.

See RescoringProcess for further details.