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Full Discussion: Climate change anyone?
The Lounge What is on Your Mind? Climate change anyone? Post 303035676 by jim mcnamara on Thursday 30th of May 2019 03:06:42 PM
Old 05-30-2019
Paleocene-Eocene Thermal Maximum - Wikipedia

The PETM was a period when world average temps were 8 degrees C warmer than today. It lasted for ~200000 years and saw ferns growing in what are now polar regions. The PETM is used a base model to project what the current changes to CO2 levels will impact. However the modern delta CO2 level is huge compared to the PETM. On the order of several magnitudes of Carbon more today than back then.
See:
Temperature and atmospheric CO2 concentration estimates through the PETM using triple oxygen isotope analysis of mammalian bioapatite | PNAS

Last edited by jim mcnamara; 05-30-2019 at 04:15 PM..
 

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FANN_GET_CASCADE_CANDIDATE_CHANGE_FRACTION(3)				 1			     FANN_GET_CASCADE_CANDIDATE_CHANGE_FRACTION(3)

fann_get_cascade_candidate_change_fraction - Returns the cascade candidate change fraction

SYNOPSIS
float fann_get_cascade_candidate_change_fraction (resource $ann) DESCRIPTION
The cascade candidate change fraction is a number between 0 and 1 determining how large a fraction the fann_get_MSE(3) value should change within fann_get_cascade_candidate_stagnation_epochs(3) during training of the candidate neurons, in order for the training not to stagnate. If the training stagnates, the training of the candidate neurons will be ended and the best candidate will be selected. It means that if the MSE does not change by a fraction of fann_get_cascade_candidate_change_fraction(3) during a period of fann_get_cas- cade_candidate_stagnation_epochs(3), the training of the candidate neurons is stopped because the training has stagnated. If the cascade candidate change fraction is low, the candidate neurons will be trained more and if the fraction is high they will be trained less. The default cascade candidate change fraction is 0.01, which is equalent to a 1% change in MSE. PARAMETERS
o $ann -Neural network resource. RETURN VALUES
The cascade candidate change fraction, or FALSE on error. SEE ALSO
fann_set_cascade_candidate_change_fraction(3), fann_get_MSE(3), fann_get_cascade_candidate_stagnation_epochs(3). PHP Documentation Group FANN_GET_CASCADE_CANDIDATE_CHANGE_FRACTION(3)
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