I kept trying and eventually got into the 10 participants. It'd be great if we could have more than that, meantime, it's an indication of how many people want to engage with NuPIC and touch base with you guys. A first world problem, as they say.
Great session, I'm already missing being in California now when I could just walk over to Subutai or Jeff and ask a question. Thanks Matt for all the work that goes into this. On Wed, Nov 13, 2013 at 12:48 AM, Pete Cumberland <[email protected]>wrote: > Not to worry Matt, and thanks for the offer Fergal but I’d rather hear > your input than take your place! :) > > Pete > > > On 13 Nov 2013, at 00:39, Matthew Taylor <[email protected]> wrote: > > > Wow, I didn't realize there was a limit! Sorry guys, maybe it's time > > to think about another technology for video chats. > > --------- > > Matt Taylor > > OS Community Flag-Bearer > > Numenta > > > > > > On Tue, Nov 12, 2013 at 4:25 PM, Jeff Fohl <[email protected]> wrote: > >> If there is someone who wants to get on, I can drop off to make room. > >> > >> - Jeff > >> > >> > >> On Tue, Nov 12, 2013 at 4:16 PM, Fergal Byrne < > [email protected]> > >> wrote: > >>> > >>> I'm getting the same. Google hangouts says the hangout is full. > >>> > >>> > >>> > >>> On Wed, Nov 13, 2013 at 12:07 AM, Pete Cumberland < > [email protected]> > >>> wrote: > >>>> > >>>> The Hangout is full it seems, so I’ll have to stick to the YouTube > feed. > >>>> > >>>> Thanks for doing this! > >>>> > >>>> Pete > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> On 12 Nov 2013, at 23:53, Matthew Taylor <[email protected]> wrote: > >>>> > >>>>> Hangout: > https://plus.google.com/hangouts/_/7ecpjh57bqs47e27f1hqkkcdps > >>>>> YouTube: http://youtu.be/rSpYyUN4iP0 > >>>>> --------- > >>>>> Matt Taylor > >>>>> OS Community Flag-Bearer > >>>>> Numenta > >>>>> > >>>>> > >>>>> On Sat, Nov 9, 2013 at 5:21 PM, Matthew Taylor <[email protected]> > >>>>> wrote: > >>>>>> At this office hour[1], Subutai is going to lead us through the "CLA > >>>>>> Quiz". We'll focus on the spatial pooler. The questions are below. > >>>>>> Bring your brains! > >>>>>> > >>>>>> **Spatial Pooler / SDR Questions** > >>>>>> > >>>>>> 0) Is an untrained CLA spatial pooler just a “random hash” (random > >>>>>> mapping from input to output vector)? Why or why not? What happens > to > >>>>>> the output of the spatial pooler if you randomly change one bit in > the > >>>>>> input. > >>>>>> > >>>>>> 1) Can you do spatial pooling with small numbers? For example, is > it > >>>>>> reasonable to have an SP with 20 columns? If not, why are large > >>>>>> numbers important in SDR's? > >>>>>> > >>>>>> a) What's the difference between picking "5 columns out of 50" vs > "50 > >>>>>> out of 500"? Both have 10% sparsity. > >>>>>> > >>>>>> b) What's the difference between picking "50 out of 100" vs "50 out > of > >>>>>> 1000"? Both will output 50 1's. > >>>>>> > >>>>>> 2) Suppose the input vector (input to the SP) is 10,000 bits long, > >>>>>> with 5% sparsity. What is the right value of coincInputPoolPct? How > do > >>>>>> you figure this out? > >>>>>> > >>>>>> 3) How does the SDR representation of input A in isolation, and > input > >>>>>> B in isolation, compare with the SDR representation of input A > >>>>>> overlapped with B? Alternatively, how does the representation of a > >>>>>> horizontal line and the representation of a vertical line compare > with > >>>>>> the representation of a cross? > >>>>>> > >>>>>> 4) Suppose we have an input vector that is 10,000 bits long. > Suppose > >>>>>> the spatial pooler has 500 columns, of which 50 are active at any > >>>>>> time. > >>>>>> > >>>>>> a) Can we distinguish many patterns, or a small number? Which > >>>>>> patterns are likely to be confused? > >>>>>> > >>>>>> b) What happens to the SDR representation if we add noise to the > >>>>>> patterns? > >>>>>> > >>>>>> c) What happens if we add occlusions? > >>>>>> > >>>>>> 5) What are disadvantages of SDR's? > >>>>>> > >>>>>> 6) How does online learning happen in the SP? > >>>>>> > >>>>>> --------- > >>>>>> Matt Taylor > >>>>>> OS Community Flag-Bearer > >>>>>> Numenta > >>>>>> > >>>>>> [1] > >>>>>> > https://plus.google.com/b/100642636108337517466/events/crmrf6k58s77hlgk4v30bll8hp8 > >>>>> > >>>>> _______________________________________________ > >>>>> nupic mailing list > >>>>> [email protected] > >>>>> http://lists.numenta.org/mailman/listinfo/nupic_lists.numenta.org > >>>> > >>>> > >>>> _______________________________________________ > >>>> nupic mailing list > >>>> [email protected] > >>>> http://lists.numenta.org/mailman/listinfo/nupic_lists.numenta.org > >>> > >>> > >>> > >>> > >>> -- > >>> > >>> Fergal Byrne > >>> > >>> Brenter IT > >>> [email protected] +353 83 4214179 > >>> Formerly of Adnet [email protected] http://www.adnet.ie > >>> > >>> _______________________________________________ > >>> nupic mailing list > >>> [email protected] > >>> http://lists.numenta.org/mailman/listinfo/nupic_lists.numenta.org > >>> > >> > >> > >> _______________________________________________ > >> nupic mailing list > >> [email protected] > >> http://lists.numenta.org/mailman/listinfo/nupic_lists.numenta.org > >> > > > > _______________________________________________ > > nupic mailing list > > [email protected] > > http://lists.numenta.org/mailman/listinfo/nupic_lists.numenta.org > > > _______________________________________________ > nupic mailing list > [email protected] > http://lists.numenta.org/mailman/listinfo/nupic_lists.numenta.org > -- Fergal Byrne <http://www.examsupport.ie>Brenter IT [email protected] +353 83 4214179 Formerly of Adnet [email protected] http://www.adnet.ie
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