Re: [robocup-rescue-s] A discussion about current problems in preextinguishing...

From: Tomoichi Takahashi <ttaka@ccmfs.meijo-u.ac.jp>
Date: Thu 26 Apr 2007 - 15:03:43 GMT

Hi,Ioannis;

iv@ecs.soton.ac.uk wrote:
> I believe that this is not how the fire simulator should work, so I propose
> the following two changes:
>
> 1. The BUG IN THE KERNEL MUST BE FIXED. This could be done by only setting
> the ignition time when a buildings fieriness changes for the first time to
> a burning state (1, 2, or 3).
>
pro.
> 2. The EFFECT OF PREEXTINGUISHING MUST BE INCREASED. However, in this case
> there is one more issue that must be taken into account. We also don't want
> to have a strategy (which would be effective in the competition) which is to
> put water on buildings that are far away from the fire and then let it be.
> So I'm proposing a middle solution, which is also supported by what
> normally happens in a fire (I believe). In every turn, right after the
> extinguish requests are processed by the fire simulator (and before the
> next cooling effect on that cycle), you have some small percentage (like
> 2%) of the water that has been put on buildings that are not on fire now
> (state = 4 to 8) evaporating without providing any cooling, then if the
> building is hot you have the cooling effect as it is now (but without the
> gamma=20%), and then at the very end of the cycle some more water (if there
> is any left), like another 2% of what is left is evaporating again without
> providing any cooling effect. This means that if a building is not getting
> really hot (because there is no fire close to it), the water put on it will
> be evaporating continually and being wasted (which is desired for the
> competition and is I believe the reason why the current rule exists with
> that coefficient that cannot be logically explained now); in fact with
> 2%+2% wasted evaporation per cycle (game round), 50% of the water is wasted
> in exactly 17 game rounds. On the other hand if a building is right next to
> a fire and getting hot, this is now a reasonably effective strategy because
> only a small amount of water gets wasted; given that real fire brigades will
> try to hose down buildings that are hot enough to catch fire, this change
> makes this strategy viable for the competition.
> I would like to point out that this change WILL NOT AFFECT THE EXISTING
> STRATEGIES ABOUT EXTINGUISHING FIRES, but they WILL GIVE EXTRA STRATEGIC
> OPTIONS TO THE AGENTS BY MAKING PRE-EXTINGUISHING A REAL VIABLE STRATEGY.
>
Have you done some simulations that show effects of the changes?
If so, I would like to see.

Thanks in advance.

Kind regards,

Tomoichi

-- 
Tomoichi Takahashi, Dr. Eng.
 Meijo University, Department of Information Sciences
 1-501 Shiogamaguchi, Tenpaku, Nagoya, 468-8502  JAPAN
 fax: + 81 52 832 1298
 e-mail: ttaka@ccmfs.meijo-u.ac.jp
 http://sakura.meijo-u.ac.jp/TakaLab/
-- --
高橋友一 
  名城大学 理工学部 情報工学科
  〒468-8502 名古屋市天白区塩釜口1-501
  tel: 052-832-1151 (内線 5066) (dial in 838-2295)
  fax: 052-832-1298
_______________________________________________
robocup-rescue-s mailing list
robocup-rescue-s@cc.gatech.edu
https://lists.cc.gatech.edu/mailman/listinfo/robocup-rescue-s
Received on Thu Apr 26 17:06:26 2007

This archive was generated by hypermail 2.1.8 : Thu 26 Apr 2007 - 15:06:29 GMT