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SasView / sasmodels

Package for calculation of small angle scattering models using OpenCL.
BSD 3-Clause "New" or "Revised" License
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random model generation needed for rpa, spherical_sld and onion (Trac #982) #291

Open pkienzle opened 5 years ago

pkienzle commented 5 years ago

Hand-tuned random model generators have not been defined for rpa, onion or spherical_sld.

See random function in core_multi_shell model definition for an example of how to define random generators for multiplicity models.

Migrated from http://trac.sasview.org/ticket/982

{
    "status": "new",
    "changetime": "2017-08-07T16:45:05",
    "_ts": "2017-08-07 16:45:05.881947+00:00",
    "description": "Hand-tuned random model generators have not been defined for rpa, onion or spherical_sld.\n\nSee *random* function in core_multi_shell model definition for an example of how to define random generators for multiplicity models.",
    "reporter": "pkienzle",
    "cc": "",
    "resolution": "",
    "workpackage": "SasView Bug Fixing",
    "time": "2017-08-02T07:01:04",
    "component": "SasView",
    "summary": "random model generation needed for rpa, spherical_sld and onion",
    "priority": "minor",
    "keywords": "",
    "milestone": "SasView Next Release +1",
    "owner": "",
    "type": "defect"
}
pkienzle commented 5 years ago

Trac update at 2017/08/07 16:45:05: pkienzle commented:

be_polyelectrolyte and unified_power_Rg need to be checked.

mass_fractal dimension was limited from 1 to 3 since calculations at higher dimensions are not supported across the full q range. Even though the calculation is defined for lower dimensions, the calculation may not be valid for that entire q range. The documentation for the model needs to be updated with a summary of the q limits rather than referring to the reference.

See also the numerical problems which limit the parameter range: