Recent comments in /f/MachineLearning

leonardokoen t1_j3qiyt4 wrote

I want to build a surrogate model and perform sensitivity analysis for a heavy simulation. The number of inputs 5 and the number of the simulations ~= 80. The question is to perform sensitivity analysis using Morris method(with optimal trajectories and simplexes) and then build the surrogate or describe the input space better with Latin Hypercube Sampling create the surrogate model and perform sensitivity analysis on the surrogate using Sobol ? If there are any papers on this issue let me know...

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themrzmaster t1_j3qi57k wrote

great post! Can someone give me a intuitive explanation on why diffusion models tends to put more weight on low spatial frequency? Is it because of the usual used noise schedule? (Cosine) In the text it is mentioned that likelihood objetive tends to weight more high spatial. It also points to an paper which involves tons of SDE, which I could not fully understand.

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londons_explorer t1_j3qd9yb wrote

> too early to consider diffusion as a serious alternative to autoregression for generative language modelling at scale

This blog post explores lots of ideas and has conjectures about why they may or may not work...

But it seems this stuff could just be tried.... Burn up some TPU credits and simply run each of the types of model you talk about and see which does best.

Hard numbers are better than conjecture. Then focus future efforts on improving the best numbers.

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joossss OP t1_j3q9uip wrote

Only this server is planned. I just went with the recommendation from NVIDIA's website, which stated 100 Gbps per A100, but I guess it makes more sense now that I think of distributed training. What NIC speed seems enough in that case?

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joossss OP t1_j3q9m8r wrote

The main reason for going to the cloud for us is that we are a research institution so, our funding is project-based meaning we have to use the funding in the allotted time and the second reason is that we already have the GPUs so the time it takes to pay itself off is faster.

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Mental-Swordfish7129 t1_j3q81e2 wrote

Reply to comment by jimmymvp in [N] What's next for AI? by vsmolyakov

Active just means that it directly modifies its input stream. And, yes, it is also predicting what that input will be, so it is reasonable to say that it is, in part, self-predictive.

Crucially, its input stream also includes features that are not itself or have not been changed by itself. The proprioceptive signals help it learn which is which.

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Mental-Swordfish7129 t1_j3q7lbz wrote

Reply to comment by jimmymvp in [N] What's next for AI? by vsmolyakov

I don't think this model is within the realm ML (it's theoretical neuroscience; although there is much overlap) but does qualify as AI which is what was asked about in the post title.

There is an annual symposium called the International Workshop on Active Inference for about 3 years now where research is presented and the papers are linked there.

And of course the dozens of research papers you can find through Google Scholar on the topic.

Edit: I did find where a few active inference papers have been presented at NeurIPS.

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jimmymvp t1_j3q6za7 wrote

I would like for someone to point me to arguments as to why diffusion in latent representation space makes sense (since I already have a generative model with the VAE and I can do Langevin MCMC sampling in the latent). Why should the samples be better in comparison to standard VAE with more sophisticated sampling(MCMC) or just diffusion? i.e. why do I need a double generative model? Is it because it's faster? It seems to me like there should be a better way, but I'm genuinely curious what are the arguments :) (except in this case that we have discrete data, for which there also exist formulations (ex. simplex diffusion)

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Mental-Swordfish7129 t1_j3q6p7m wrote

Reply to comment by jimmymvp in [N] What's next for AI? by vsmolyakov

The model is generative. Each layer generates predictions about the patterns of the layers below. The bottom layer generates predictions about the sensory data, some of which is proprioception data.

I have never published anything. I do not have that much time and it would largely be redundant. You can look at Friston, et.al. for the math. I use nearly the same math and logic.

What I'm doing bears only a superficial similarity to Gato in my opinion, but I can't say I've looked into it deeply. I've been far too busy with life. I only have my tiny spare time for this project unfortunately.

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