ACtivation function

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klubow
Posts: 14
Joined: Thu 31. May 2012, 12:16

ACtivation function

Postby klubow » Thu 31. May 2012, 12:24

Can you tell me how activation function called IDENT01 is calculated ?
What influence have
-activation
-activation threshold
-activation sustain factor

Maybe someone can give me mathematical formula how its calculated ?

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Admin
Site Admin
Posts: 438
Joined: Sun 16. Nov 2008, 18:21

Re: ACtivation function

Postby Admin » Sat 2. Jun 2012, 09:32

Hi,

probably easiest is some pseudo-code here:

Code: Select all

activation = activation * sustainFactor;
// The following code is only used if the neuron is NOT an input neuron. For input neurons the calculation is finished here.
sum = SumUpInputs();
sum = sum - activationThreshold;
activation = activation + sum;
if (activation > 1)
{
    activation = 1;
}
else if (activation < 0)
{
    activation = 0;
}


Does that help?

Regards
Thomas Jetter

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Admin
Site Admin
Posts: 438
Joined: Sun 16. Nov 2008, 18:21

Re: ACtivation function

Postby Admin » Sat 2. Jun 2012, 10:39

Hi again,

you can also find additional information in the MemBrain Help file:

Press F1 in MemBrain and browse to the chapter 'Neurons in MemBrain' - 'Neuron Model And Operation'.

This help chapter describes the calculations of neuron activation and output in more detail.

Regards
Thomas Jetter

klubow
Posts: 14
Joined: Thu 31. May 2012, 12:16

Re: ACtivation function

Postby klubow » Tue 12. Jun 2012, 11:44

that should be enought for now,
I have my net learnt, now I want to implement that net into my script (Excel and Amibroker)

thank you


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