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+--- Thread: Efficiency (/showthread.php?tid=1261)
RE: Efficiency - kriu - 2015-07-21
The new efficiency ratio is simply wrong
RE: Efficiency - Knickohr - 2015-07-21
Yes, thats correct !
But without the "denominator", poor performing station will be pushed up, if they sending a lot of signals (and maybe a few more strokes). Thats not good for the network.
![[Image: efficiency_l.png]](http://www.sternhimmel-ueber-ulm.de/blitz/efficiency_l.png)
![[Image: efficiency.png]](http://www.sternhimmel-ueber-ulm.de/blitz/efficiency.png)
You see the difference ? I find the red graphic fair. It doesn't denominate good performing station, but suppresses heavy signal-jammer. And it also shows good performing stations with less signals at the right side in the graph, not only on the left side.
Thomas
RE: Efficiency - Gerhard.Wittevee - 2015-07-21
(2015-07-21, 17:04)Knickohr Wrote: But without the "dominator", poor performing station will be pushed up, if they sending a lot of signals (and maybe a few more strokes). Thats not good for the network.Hi Thomas,
But as the screenshot I posted shows; A station with Less strikes and more signals is ranked higher. The 2 stations I compared here are only 10km apart.
I agree with Kriu. This can not be right.
RE: Efficiency - Knickohr - 2015-07-21
Its depends on how less and how more
Thomas
RE: Efficiency - Gerhard.Wittevee - 2015-07-21
(2015-07-21, 18:54)Knickohr Wrote: Its depends on how less and how more
Thomas
I attached a screenshot. So you can see how less and how more...
Gerhard
RE: Efficiency - Knickohr - 2015-07-21
It has something to do with this :
"This is the old effectivity value multiplied by the factor min (Strikes / Signals(s), Signals(s) / Strikes)."
Thomas
RE: Efficiency - Gerhard.Wittevee - 2015-07-21
(2015-07-21, 19:26)Knickohr Wrote: It has something to do with this :
"This is the old effectivity value multiplied by the factor min (Strikes / Signals(s), Signals(s) / Strikes)."
Thomas
Read that.... it is posted in this thread.
Or do you think sending more signals and less strikes is better?? I guess you know better...
I hope Egon, or one of the developers finds time to reply
Gerhard
RE: Efficiency - Gerhard.Wittevee - 2015-07-21
(2015-07-21, 19:26)Knickohr Wrote: It has something to do with this :
"This is the old effectivity value multiplied by the factor min (Strikes / Signals(s), Signals(s) / Strikes)."
Thomas
Read that.... it is posted in this thread.
Or do you think sending more signals and less strikes is better?? I guess you know better...
I hope Egon, or one of the developers finds time to reply
Gerhard
RE: Efficiency - Egon - 2015-07-23
Hi Folks,
I am really impressed by your ambition to analyze the effectivity in such detail.
If we find a more useful computation, I will change it, no problem, but I need arguments not only suggestions to improve own stations.
Let us recal the notations and the original value I have used in the past.
The values consider the last hour.
Strikes (x,s) = number of strikes computed by our network in a rage of x km to station s
Hits (x,s) = number of strikes computed by our network in a range of x km to station s at that station s was involved
Signals (s) = number of signals of station s
Strikes() = total number of strikes computed by our network in the region to that the station sends data (note that some border stations send strikes to several regions)
min (x,y) = minimum of x and y
The old values for the effectivity of a station S were:
Effecitivity S = Hits (50km, S) / Strikes (50km)
Effecitivity M = Hits (500km, S) / Strikes (500km)
Effecitivity L = Hits (5000km, S) / Strikes (5000km)
The disadvantages are the following:
1.) A station S with very very low Hits (5000km, S) can easily get an Effectivity L of 100% if it is placed in a region where all computations can only be done with the help of this station (for example, a border position). Stations in densely populated areas usually get lower values.
2.) If Signals (s) increases, then often Hits (5000km, S) also increases a little bit. Some stations have tenfold its Signals (s) only to increase its effectivity by 1 percent. This increases the load of our servers significantly
So I have added the additional factor:
min (Strikes / Signals (s), Signals (s) / Strikes)
And now your suggestions for a more adequate computation of an effectivity.
RE: Efficiency - Knickohr - 2015-07-23
(2015-07-23, 06:27)Egon Wrote: And now your suggestions for a more adequate computation of an effectivity.
No suggestion, I agree with Egon. I have advantages for all my stations. case 1 (Namibia) and case 2 (Germany). Heavy signal-jammer should be suppressed.
Thomas