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by ISayMoo
Yesterday, 8:43 pm
Forum: Numerical Methods Forum
Topic: Are Artificial Intelligence methods (AKA Neural Networks) for PDEs about to rediscover the wheel ?
Replies: 155
Views: 3161

Re: Are Artificial Intelligence methods (AKA Neural Networks) for PDEs about to rediscover the wheel ?

Try linear regression with L2 loss, but at every step select randomly a subset of (x, y) pairs.
by ISayMoo
March 17th, 2019, 10:32 am
Forum: Numerical Methods Forum
Topic: Are Artificial Intelligence methods (AKA Neural Networks) for PDEs about to rediscover the wheel ?
Replies: 155
Views: 3161

Re: Are Artificial Intelligence methods (AKA Neural Networks) for PDEs about to rediscover the wheel ?

The line search for deterministic case is a solved problem, isn't it? I don't really know. Don't know enough to say But have a look at this article by Bill Hager who is a numerical analyst. Granted its nonlinear CGM but still http://people.cs.vt.edu/~asandu/Public/Qual2011/Optim/Hager_2006_CG-surve...
by ISayMoo
March 17th, 2019, 10:30 am
Forum: Numerical Methods Forum
Topic: Are Artificial Intelligence methods (AKA Neural Networks) for PDEs about to rediscover the wheel ?
Replies: 155
Views: 3161

Re: Are Artificial Intelligence methods (AKA Neural Networks) for PDEs about to rediscover the wheel ?

Here's a proposition: implement a classic function (e.g the famous banana) and add Gaussian noise to the gradients and values. You'll have a test case to train on. I understand why you don't want to start with batch SGD. That's a good idea In this way it might understanding the approach in Mahserec...
by ISayMoo
March 16th, 2019, 11:59 am
Forum: Technical Forum
Topic: Hacking ML for fun & profit
Replies: 63
Views: 2376

Re: Hacking ML for fun & profit

Learning rate schedule is a kind of "artificial time", too.
by ISayMoo
March 15th, 2019, 9:55 am
Forum: Politics Forum
Topic: Are you ready for Brexit?
Replies: 254
Views: 3455

Re: Are you ready for Brexit?

I think it would be fantastic to get rid of Northern Ireland.
by ISayMoo
March 14th, 2019, 10:42 pm
Forum: Politics Forum
Topic: Are you ready for Brexit?
Replies: 254
Views: 3455

Re: Are you ready for Brexit?

Image
by ISayMoo
March 14th, 2019, 10:17 pm
Forum: Numerical Methods Forum
Topic: Are Artificial Intelligence methods (AKA Neural Networks) for PDEs about to rediscover the wheel ?
Replies: 155
Views: 3161

Re: Are Artificial Intelligence methods (AKA Neural Networks) for PDEs about to rediscover the wheel ?

I'm worried that you're throwing the baby out with the bath-water. The line search for deterministic case is a solved problem, isn't it? See Nocedal and Wright. The problem with the classic Wolfe conditions is that they fail when the function is stochastic (hence SGD). You can implement the probabil...
by ISayMoo
March 14th, 2019, 8:54 pm
Forum: Politics Forum
Topic: Are you ready for Brexit?
Replies: 254
Views: 3455

Re: Are you ready for Brexit?

No. Spain will ask for Gibraltar.
by ISayMoo
March 14th, 2019, 7:43 pm
Forum: Politics Forum
Topic: Are you ready for Brexit?
Replies: 254
Views: 3455

Re: Are you ready for Brexit?

We're in a limbo.
by ISayMoo
March 13th, 2019, 9:44 pm
Forum: Politics Forum
Topic: Are you ready for Brexit?
Replies: 254
Views: 3455

Re: Are you ready for Brexit?

Image
by ISayMoo
March 13th, 2019, 9:25 pm
Forum: Technical Forum
Topic: Hacking ML for fun & profit
Replies: 63
Views: 2376

Re: Hacking ML for fun & profit

It depends. Taking voice recognition as an example, if discretisation allows you to classify the speaker accurately, you're good.

I mean, how do you check that the discretisation of music from analog tape to digital CD doesn't introduce artefacts? By listening to both and comparing.
by ISayMoo
March 13th, 2019, 8:37 pm
Forum: Politics Forum
Topic: Are you ready for Brexit?
Replies: 254
Views: 3455

Re: Are you ready for Brexit?

Turns out the House of Commons ain't ready either.
by ISayMoo
March 13th, 2019, 8:36 pm
Forum: Technical Forum
Topic: Hacking ML for fun & profit
Replies: 63
Views: 2376

Re: Hacking ML for fun & profit

If you google for "continuous time reinforcement learning", you'll find some papers. The reasons why so much of recent AI/ML work doesn't use continuous time are two-fold: 1. they solve problems which have no temporal dimension, e.g image classification; 2. they either work on time-discretised data ...
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