jbay808

22 ms·

211.
by jbay808 4y ago
> For any category of good you can think of there will be producers that make a high quality version of it. Consumers who care about that quality (according to however you’re measuring it) will make their decisions accordingly. I've
212.
by jbay808 4y ago
> The quality of a mass-produced product like a consumer hand tool isn't a function of the country in which it is made but rather of its design There's a lot more to production quality than just product design. Quality of mater
213.
by jbay808 4y ago
This should be the top comment. It's like criticizing a tutorial page on pythonguy.com titled "Python techniques for copying data structures" because the author didn't explain that the same techniques are used in Julia.
214.
by jbay808 4y ago
> Instead of using air gaps, Sansone thought he could incorporate another magnetic field into a motor. This would increase this saliency ratio and, in turn, produce more torque. This appears to be the novel part. It's an SRM but it
215.
by jbay808 4y ago
I guess we've met different people!
216.
by jbay808 4y ago
It's possible that they aren't worrying because it's fun to worry about, but because they're actually worried about it, and not having any fun? I mean, I'm worried about climate change, but not because it's f
217.
by jbay808 4y ago
It's because "runaway AI" implies a degree of superhuman skill at tasks including, at least, AI programming. (The reasoning goes that if it can reprogram itself to improve its core intelligence beyond what it was initially pr
218.
by jbay808 4y ago
If you believe that the timeline for runaway AI is comparable to the timeline for runaway climate change, and if you believe that AI is unlikely to be aligned with furthering human values, then it's a concern that you may view as havin
219.
by jbay808 4y ago
I recently set up Windows on a bunch of new computers, and was reminded of how atrocious the process is. All sorts of widgets, telemetry, and bloatware coming along for the ride. There's a laundry list of config changes and uninstalls
220.
by jbay808 4y ago
Interesting. It seems even they don't know the reason for the run. > During the period since our initial public offering, the Company noted significant volatility in our ADS price and, also observed some very active trading volume.
221.
by jbay808 4y ago
Fortunately, his eyes have their own set of lenses that flip the image the right way up again.
222.
by jbay808 4y ago
I'm not an economist, but I'm going to go out on a limb here: my expectation is that between now and 2025, a decline in construction demand in China will have a more significant impact on global copper consumption than an increase
223.
by jbay808 4y ago
In the static case, the Kalman filter converges to a fixed (frequency domain) filter after running for a while. The type of frequency behaviour depends on the system properties. The filter it converges to is the Wiener filter for that syste
224.
by jbay808 4y ago
> And the city could crack down more on the drivers who blow through red lights or stop across crosswalks. Based on my recent visit to New York, the main traffic issue I saw was really bad light timing. This trains both pedestrians and d
225.
by jbay808 4y ago
Good point, thanks. When I get home I'll update the article title to "Is the Kalman filter a low-pass filter? Sometimes!"
226.
by jbay808 4y ago
Thanks, and I broadly agree with what you say. It's only under specific conditions (system dynamics, process covariance, measurement matrices, and measurement covariance are all static) that the Kalman filter converges to the Wiener fi
227.
by jbay808 4y ago
Absolutely! And thank you for saying so. (To be clear, the answer to the question posed in the title was never intended to be yes . The answer was intended to be sometimes .) In one of my other articles where I applied the Kalman filter t
228.
by jbay808 4y ago
Hmm, I'm not trying to make that suggestion at all. How did I make that impression? I'd like to correct it. My goal with this article is only to help readers who have wondered how time-domain approaches like Kalman filtering relat
229.
by jbay808 4y ago
> The article also doesn’t show any confidence bands which is a huge part of Kalman filters too. The figure does show confidence bands in pale blue, although they're hard to see because the data points kind of obscure them. But sinc
230.
by jbay808 4y ago
Absolutely. The Kalman filter has many uses, and filtering a single stream of data is only one of them. Sensor fusion is an important application, which I believe is mentioned in the first footnote.
231.
by jbay808 4y ago
Author here. A unitary model is still a model; I chose it mainly just to minimize the mental overhead for the reader. But even if you use a different model, the Kalman filter will still converge to a frequency-domain filter as long as the d
232.
by jbay808 4y ago
Author here. Yes, if the system has a high-pass behaviour, then the corresponding Kalman filter will converge to a high-pass filter, and so on. Non-low-pass-like behaviour can emerge from the prediction step, if the model is not unitary.
233.
Is the Kalman filter just a low-pass filter?(jbconsulting.substack.com)
267 points by jbay808 4y ago|72 comments
234.
by jbay808 4y ago
Carbon emissions is a big one. Since the climate is far from equilibrium, temperature goes as something like the time-integral of excess carbon concentration. CO2 concentration goes with the integral of total emissions. So emissions is roug
235.
by jbay808 4y ago
> This forces a ton of young people to buy property who may otherwise rent. It's not clear that tilting the rent/own preference toward ownership results in a net increase of housing prices, because for every unit of homeowner d
236.
by jbay808 4y ago
China has been building a lot, and I mean a lot. But their housing market is perhaps the most broken of all, and it hasn't done wonders for affordability. Or not yet anyway; if we see the bubble pop it perhaps will, but that's far
237.
by jbay808 4y ago
I often hear this, but that can't possibly be the explanation, as it was true both before and after Japan had a colossal real estate bubble and crash: https://gestaltu.com/wp-content/uploads/2016/08/
238.
by jbay808 4y ago
If they're poor, their debts are likely not backed by collateral - akin to credit card debt or payday loans. Those debts are at such high interest rates that inflation and rate hikes have little bearing relative to how much it already
239.
by jbay808 4y ago
> a Vancouver parent that was "fighting police for the right to send his kids to school alone on public transit" or something. It's true (although it wasn't the police but rather the Ministry of Children & Family
240.
by jbay808 4y ago
Agreed on both points, but I haven't seen those policies put forward. I don't have a horse in this race but it will be interesting to see what happens.

More ›