Dear @rhyolight @marty1885 @sheiser1 and all! we can install & run the Nupic. When compare to Necortex/HTM theory, i still have question. Hope anyone help explain. In NUPIC , in TM we use 2048 minicolums and 32 cell per colums that means we have totally 2048 * 32=65536 cells. But every cell has…

Hi Which 4096 cells that a cell connect to for prediction ( etablish synapes) ? The Temporal Memory layer learns the connection on the fly. To be particular, in every time step, segments can grow up-to maxNewSynapse synapses to previous winning cells. These synapses ( between a cell to 4096 or…

Thank you @marty1885 for quick help . But i still dont understand [image] HTM for IT Hi Which 4096 cells that a cell connect to for prediction ( etablish synapes) ? The Temporal Memory layer learns the connection on the fly. To be particular, in every time step, segments can grow up-to maxNe…

[image] HTM for IT But a cell only has 4096 synapes, and each synapes has a permenace value ( increase or decrease every time step if the destination cell active or not). that cell can not has as many synapses to connect to all other cells in the TM ( 65535??) Yes, every cell can only go up to…

[image] HTM for IT Yes, every cell can only go up to 32 synapses per segment. That’s the limit. Synapses doesn’t grow in that segment anymore. Though it can grow in others if it choose to. yes. because of every cell has a limited synapes ( 4096) so that cell has to choose which cells to connec…

[image] HTM for IT But a cell only has 4096 synapes, and each synapes has a permenace value ( increase or decrease every time step if the destination cell active or not). that cell can not has as many synapses to connect to all other cells in the TM ( 65535??) Indeed, a single cell does not co…

[image] HTM for IT To one from a subset of those which were active at previous step, when it is time for this cell to “predict” that it will fire next. This works because activations are sparse, and a subset of a sparse vector is sufficient to identify another sparse vector with huge probability.…

[image] HTM for IT i can understand that in the neocortex theory . But in the NUPIC […] Oh, okay. Well, I have a limited knowledge of python and current NuPIC implementation, but after a quick search, I found that each post-synaptic cell in NuPIC has a map of its synapses per pre-synaptic cel…

thank you @gmirey . i also found this Implementation details: in our software implementation, we make some simplifying assumptions that greatly speed up simulation time for larger networks. Instead of explicitly initializing a complete set of synapses across every segment and every cell, we greed…

But i still hope find a intuitive and easier document to undestand what method that Nupic Core use for choose synapes, dendrite segments (in phases initialization, learning+updating, …) thank you

[image] life_happy: But i still hope find a intuitive and easier document to undestand what method I had to create visualizations of the SP and TM to really understand it. Then I made this . This is the best I can hope to explain it today. :man_shrugging: Imagine this picture of distal connec…

SP / TM connectivity questions

Engineering

life_happy November 12, 2019, 2:26pm 7

thank you @gmirey, i can understand that in the neocortex theory . But in the NUPIC, i mean in programming algorithm, it has to be defined clearly. So how can NUPIC choose the cells to make synapses to ?? ( random or near cells or …?) do you know that ? pls show me. thank you.

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SP / TM connectivity questions

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