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Russell Kaplan
@russelljkaplan 3 years, 4 months ago 522 views

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Lessons learned debugging ML models:

1/ It pays to be paranoid. Bugs can take so long to find that it’s best to be really careful as you go. Add breakpoints to sanity check numpy tensors while you're coding; add visualizations just before your forward pass (it must be right before! otherwise errors will slip in).

2/ It's not enough to be paranoid about code. The majority of issues are actually with the dataset. If you're lucky, the issue is so flagrant that you know something must be wrong after model training or evaluation. But most of the time you won't even notice.

3/ The antidote is obsessive data paranoia. Without this, data issues will silently take away a few percentage points of model accuracy.

4/ You can unit test ML models, but it's different from unit testing code. To prevent bugs from re-occurring, you have to curate scenarios of interest, then turn them into many small test sets ("unit tests") instead of one large one.

5/ Each unit test should have an evaluation metric of interest, a pass/fail threshold, and be defined for a curated subset of data.

6/ Without model unit tests, you will see aggregate metrics improving in your evaluation but introduce critical regressions when you actually ship the model. Unit tests are a requirement to durably fix bugs in ML-powered products.

7/ Bugs are fixed faster when iteration times are faster. Impose a hard ceiling on model training time, even if you could squeeze more gain by training a bit longer. In the long run, experiment velocity >> performance of one model.

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In the Mandir, when blindfolded Narhari touched Vitthal, he felt as if he was touching Shiva with matted hair, the moon, snake in His neck and Trishul in His hand. Ecstatic with joy, he removed the blindfold to see Shiva but he found the murti of Vitthal with Rukmini there.

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Agama Shastra is a Sanskrit word that means the manual for worship, temple building, rituals etc in Hindu Tradition.From Sanskrit,agama means handed down by tradition and Shastra means a commentary or treatise.

Therefore, Agama Shastra is a collection of ideas that drafts the rules for worship, temple construction, spirituality and rituals. It has been a guideline for many Hindus from ancient times. It's a collection of Sanskrit, Tamil and Grantha scriptures that mostly contains...

...methods of temple construction, idol creation, philosophical doctrines and meditative practices. It came into being after years of assimiliation and from a variety of sources. Some parts of it are pre-vedic while some are post-vedic.

Hindu Temples are not just temples, they are the pride and identity of Hindus. They are the symbols of Hindu unity and their religious aspirations. Temples are the places of spiritual healing and are our connection with the creator almighty.

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IT WAS RISHI KANADA WHO GAVE THE ATOMIC THEORY & TALKED ABOUT THE GRAVITY OF EARTH, 2600 YEARS BEFORE AN APPLE FELL IN FRONT OF NEWTON'S EYES:

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And this is because, most of us are not even aware of an ancient Indian Sage named Kanada, who was the first to formulate the theory of atoms, almost 2600 yrs before Dalton and talk about earth's gravity.

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He was mesmerised by this very fact that how a small grain of rice becomes food for the ant but to satisfy the hunger of a person so many grains are needed together. This incidence made him realize the importance of a single grain of rice.

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