4 ms·
>...averages show they spots sit empty most of the time. But that type of analysis ignores the obvious fact that most parking is built to support peak times. T
by DINKDINK 8y ago
>...averages show they spots sit empty most of the time.
But that type of analysis ignores the obvious fact that most parking is built to support peak times.
The word, that not enough technical and non-technical people know, that describes this issue is ergodicty:
> an ergodic dynamical system is one that, broadly speaking, has the same behavior averaged over time as averaged over the space of all the system's states in its phase space.
https://en.wikipedia.org/wiki/Ergodicity https://en.wikipedia.org/wiki/Ergodicity
- haste410 8y agoSeems like a useful term to know. Too bad the wikipedia article is too dense to understand.
- toomuchtodo 8y agoConsider editing the Wikipedia page to make the term more approachable.
- xapata 8y agoI'm not sure ergodic is what you're looking for here. Ergodic is like a gas particle in a box. Over time, it'll have been at every position in the box. Non-ergodic is like a house of cards. Eventually, it'll collapse and stay down.
- DINKDINK 8y agoLet there be a gas particle in a box. Now cut the box in half and if the gas particle can exist in all remaining space in the box, the box has had an ergodic transformation. Non ergodic: Let there be a car on a major highway in a city. Now cut the roads on the highway in half (say for construction). Congestion results and consequently the cars never again move as fast as before. (equivalent to your house of cards) def ergodic(f(),x): return f(avg(x)) == avg(f(x))
- xapata 8y agoAh, yes, traffic is non-ergodic. I thought you were suggesting the opposite. BTW, it looks like you've got a syntax error in your Python example.