Very Genereal FEM/FEA Solution Libraries

Forums Personal Topics Unbidden Thoughts Very Genereal FEM/FEA Solution Libraries

This topic contains 3 replies, has 1 voice, and was last updated by  Josh Stern November 29, 2022 at 5:19 am.

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  • #125059

    Josh Stern
    Moderator

    Also possible is to represent neighborhoods of discretized time series for the entire mesh+parameters & move the sliding window. That could be computationally expensive, but there are tricks to optimize out the cost by moving indices instead of most data at each step.

  • #125095

    Josh Stern
    Moderator

    Some other hints about generating optimized exploratory sequences:

    Conjugate gradients algorith. Can be generalized in several ways

    Space filling curves on grids can be constructed at different scales of detail – give a way to map large integers into grid locations, where near values tend to be near & far values tend to be far – can be used to hash the set of neighborhoods already visited or waiting for a go at next level expansion. Being in a grid site at level I can be used as a basis for rejection sampling filter in the low discrepancy seque

    One can look ahead at the next N values of any given discrepancy sequence & sort it in some way – e.g. distance from current point or from highest level of space filling curve or grid where a hit is matched. Again, this can be done with rejection sampling, and it can be used as another virtual dimension for generalized conjugate gradients (go to a less explored area or keep optimizing here?)

  • #125096

    Josh Stern
    Moderator

    For algorithmic efficiency, it is often necessary to treat border regions in a special way. Sometimes that involves adding extra border neighborhoods with special values or treatment.

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