Uploaded image for project: 'The Virtual Brain'
  1. The Virtual Brain
  2. TVB-1679

Fix Hyperbolic Tangent Coupling

    XMLWordPrintable

Details

    Description

      Normalisation by in strength may provoke division by zero.
      The way it is currently handled leads to numerical overflows.

      The previous solution didn't make a lot of sense.

      The normalisation by the in-strength is done, so that if we sum all the weights of a row the result is 1.
      If the in-strength is zero, then it does not make sense to normalise that row. This only means that that node will be disconnected.
      To avoid division by zero a possible solution would be to divide by 1; or normalise only where the in strength is > 0.

      It's very likely that the overflows are a result of very small in strength values in combination with the LB model.

      Gliffy Diagrams

        Attachments

          Activity

            People

              paula.sanz-leon Paula Sanz Leon
              paula.sanz-leon Paula Sanz Leon
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Time Tracking

                  Estimated:
                  Original Estimate - 4 hours
                  4h
                  Remaining:
                  Remaining Estimate - 0 minutes
                  0m
                  Logged:
                  Time Spent - 1 hour Time Not Required
                  1h