NEW: Smooth preconditioner and compact set updates - Githubissues

AdvancedPhotonSource / tike

Repository for ptychography software

http://tike.readthedocs.io

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NEW: Smooth preconditioner and compact set updates #213

Closed carterbox closed 2 years ago

carterbox commented 2 years ago

Purpose

Allow compact mini-batches with synchronized updates for the lstsq method.

Instead of having a new preconditioner for each minibatch, preserve it over multiple updates.

Approach

Collect the object updates from all minibatches and apply them all at once instead of sequentially.

The preconditioner is averaged with the previous iteration preconditioner to have a geometric mean type smoothing.

Pre-Merge Checklists

Submitter

[x] Write a helpfully descriptive pull request title.
[x] Organize changes into logically grouped commits with descriptive commit messages.
[x] Document all new functions.
[ ] Click 'details' on the readthedocs check to view the updated docs.
[x] Write tests for new functions or explain why they are not needed.
[x] Address any complaints from pep8speaks.

Reviewer

[ ] Actually read all of the code.
[ ] Run the new code yourself; the included tests should make this easy.
[ ] Write a summary of the changes as you understand them.
[ ] Thank the submitter.

carterbox commented 1 year ago

Related to https://github.com/AdvancedPhotonSource/tike/issues/145

carterbox commented 1 year ago

Related to #148