[ExI] ANN question
William Flynn Wallace
foozler83 at gmail.com
Wed Mar 15 20:09:34 UTC 2017
On Wed, Mar 15, 2017 at 2:26 PM, Adrian Tymes <atymes at gmail.com> wrote:
> On Mar 15, 2017 11:00 AM, "William Flynn Wallace" <foozler83 at gmail.com>
> On Wed, Mar 15, 2017 at 12:29 AM, Adrian Tymes <atymes at gmail.com> wrote:
>> At any given instant, a neuron may either be firing or have a time
>> until next firing - but a firing is a (mostly) discrete event, with
>> one firing distinct from the next.
>> If it was not distinct - if it was "always firing" - then there would
>> be no such thing as "speed" of firing. Rather than toggle on then off
>> at various rates, it would simply be always on.
> There is a great deal of controversy about rate of firing, from about 1
> every 6 seconds to 200 per second, up to a couple of thousand at the
> fastest (for cortical neurons). By always firing I meant only that it
> never rested more than a few seconds at the very most. Yes, discrete -
> absolute refractory period.
> Right. And during that refractory period, the output is 0, regardless of
> how long it will be or has been to the next/previous firing.
> So, again, that gives three states - not changing speed, slowing,
> No, two states: firing, or between firings.
> You are declaring the acceleration to be a state, when the state is more
> like the current position, and the simplification is that most ANNs don't
> even consider velocity let alone acceleration.
OK, I think we are in agreement: you and the ANN at looking at the state
of the neuron at a fixed point in time, and I am looking at it over a
period of time. Maybe we need to look at both to understand the neuron
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