tnecniv

24 ms·

271.
by tnecniv 3y ago
Good point! Still, a big reason why the reason why the KF is a staple is that it’s really really fast. When I’ve used tools like the ones that you mentioned, it was normally not for inference not in a feedback loop. I’m less familiar with m
272.
by tnecniv 3y ago
From my understanding of DFT that makes sense but it seems like in that case you are using the wrong tool. Approximate theories are good when the approximations are good. If your phenomena is strongly correlated, throwing out those correlat
273.
by tnecniv 3y ago
The Thrun book is great and one of the few “essential” texts on robotics in my opinion.
274.
by tnecniv 3y ago
Not your measurements. That correlation must be specified. It works out the correlations of your state (the thing you are estimating). In the above example, their measurements are noisy mechanical states (position and momentum). However you
275.
by tnecniv 3y ago
This is the thing with math and programming. The anti-math programmers are right: you don’t need much math to have a career as a programmer because lots of applications (e.g. web pages) don’t need much math. However the more math you know,
276.
by tnecniv 3y ago
The Kalman filter does not require adding noise. The noise is a product of whatever phenomenon you are estimating. Normally we use noise in a model to cover up some behavior that is far to complicated to include in a more rigorous way. A cl
277.
by tnecniv 3y ago
For what it’s worth, the EKF isn’t much more complicated than the regular KF. You are basically just linearizing your dynamics / sensor model then doing the KF updates with that linear model. However, for quadrotors specifically, there
278.
by tnecniv 3y ago
This can work if the time scale of inference is smaller than the time scale of your measurements. I’m skeptical that this would work on a quadrotor that requires a fast control loop. However, model predictive control (determining actions gi
279.
by tnecniv 3y ago
There seems to be a lot of confusion about what Kalman filters are for in this thread. Perhaps that’s what happens when you seek a non-mathematical introduction to a mathematical topic but nevertheless I’m going to try and clear this up. Sp
280.
by tnecniv 3y ago
If your only sensor is broken and tells you nothing, then your system is unobservable with such a sensor and the only thing you can do is propagate your initial uncertainty through the dynamics. The Kalman filter will do exactly that in thi
281.
by tnecniv 3y ago
It’s not about playing the wave form but creating the wave form. Guitarists today still use tube amps and germanium transistors (in guitar pedals) for two reasons. The first is that most guitar amps back in the day used tubes (mostly) and t
282.
by tnecniv 3y ago
I’d be interested in seeing a source on that. My understanding was that it was a powerful and popular computational tool. The theory is approximate but approximate theories can still be quite useful if the approximation is a good one.
283.
by tnecniv 3y ago
I identify with that. It didn’t help that around the end of Covid I went through a terrible break up and all my grad school friends finished their degrees and moved while I was still working on mine. It felt like I went to the bathroom at a
284.
by tnecniv 3y ago
There’s an old saying that “simulations are bound to succeed,” but also as an academic that has a working knowledge of statistical mechanics but is not a (condensed matter) physicist, from what I’ve read it seems folks are approaching this
285.
by tnecniv 3y ago
That’s not unsurprising when it comes to a lot of research. The bench scientists I know often struggle with yield rates and labs have special knowledge about their particular set up when it comes to getting stuff to work. Even in robotics (
286.
by tnecniv 3y ago
I posted this elsewhere but I think it was after comments got merged in here, so sorry for the spam if you happen to see it twice: I’m interested to know if anyone has any recommended resources on DFT or DDFT (the simulation method used her
287.
by tnecniv 3y ago
My memory is kind of sketchy due to its insane complexity, but that’s also the main story point of the Metal Gear (Solid) games. Certain individuals gain massive wealth in the chaos of WW2. They use these resources to further enrich themsel
288.
by tnecniv 3y ago
I’m interested to know if anyone has any recommended resources on DFT or DDFT (the simulation method used here) for someone with good applied math knowledge but who is not a physicist. I have a decent working knowledge of stat mech from kno
289.
by tnecniv 3y ago
And audio nerds everywhere are still lusting after germanium transistors to this day!
290.
by tnecniv 3y ago
Normally (at least in my field), that’s beyond the scope of peer review in the traditional sense. Peer review typically just involves review of just the material submitted to the journal (manuscript, data, maybe code depending on its size a
291.
300 Years of Optimal Control: From Brachystochrone to Maximum Principle [pdf](ieeexplore.ieee.org)
2 points by tnecniv 3y ago|0 comments
292.
by tnecniv 3y ago
Eh I think that depends on how you define emo. Like most genres today it might not be as mainstream but there’s plenty of medium sized groups making music in that space with a dedicated audience. If anything I’d say sadboy is a vibe that co
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by tnecniv 3y ago
I imagine a similar scheme can be used for general inference if you have a way to cluster components of your model in a similar fashion even if the parameters are not spatial. Perhaps your model has some kind of natural tree structure.
294.
by tnecniv 3y ago
My assumption is that, when you work with this stuff every day, you become desensitized to it and underestimate the risk. When I was a freshman in electrical engineering, I was very careful about disconnecting power. By the time I graduated
295.
by tnecniv 3y ago
PyBullet (I guess Bullet more broadly) sees a lot of use
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by tnecniv 3y ago
Kirk Gibson’s walk-off homer in the ‘88 World Series. https://m.youtube.com/watch?v=N4nwMDZYXTI For context, Gibson injured both legs (left hamstring and right knee) during the playoffs and it was unclear if he could even h
297.
by tnecniv 3y ago
Yeah my understanding was that they drank large volumes of low ABV beer in the Middle Ages and did so in part because it was safer than many water sources
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by tnecniv 3y ago
Also you don’t know how the other person will react. They might erroneously equate psilocybin with PCP or other unrelated drug classes and look at you negatively
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by tnecniv 3y ago
In grad school, I was always most productive after dinner because that was the largest uninterrupted block of time to do math / code.
300.
by tnecniv 3y ago
As an aside: I do a lot of numerical research and have mainly been using python with Jax due to how trivial it is to run my code on the GPU with Jax. However, I’ve gotten increasingly fed up with Python as a language and Julia is basically

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