From piccinon at di.unipi.it  Wed Apr  6 03:45:18 2005
From: piccinon at di.unipi.it (Fulvio Piccinonno)
Date: Wed, 6 Apr 2005 09:45:18 +0200 (CEST)
Subject: [Coin-SMI] About SMI class hierarchy.
Message-ID: <Pine.LNX.4.44.0504060922230.26906-100000@kuhn.di.unipi.it>

Hi

I am beginning to use SMI. Since I am new both to object oriented 
programming and to stochastic programming I have a lot of questions about 
SMI. Just start with one.

Looking at the automatic documentation, the class hierarchy is quite weak 
and the SmiScnModel class does not appear at all. I guess that the 
SmiScnModel class should stay on the top of a diagram under which I will 
put SmiScnData and SmiDiscreteDistribution classes.
Is this correct or am I wrong (and will study more SMI and C++)?

Thanks for your answers.

Before posting this message I give a look at the SMI mailing list archive. 
I don't know why but I did not receive all the messages, so I read only 
today about the proposal of implementing the first example in Birge and 
Louveaux book. It is exactly what I am doing, so I can post the SMPS 
files and the code to solve the model starting from them in my next email.

  Fulvio



From kingaj at us.ibm.com  Thu Apr  7 14:46:50 2005
From: kingaj at us.ibm.com (Alan King)
Date: Thu, 7 Apr 2005 14:46:50 -0400
Subject: [Coin-SMI] About SMI class hierarchy.
In-Reply-To: <Pine.LNX.4.44.0504060922230.26906-100000@kuhn.di.unipi.it>
Message-ID: <OFB885BC33.04F73E30-ON85256FDB.00680322-85256FDC.00672A1D@us.ibm.com>

Dear Fulvio

My humble apologies for the documentation.  Please continue to study SMI 
and C++!  Perhaps you can contribute some documentation as you go along... 
:-)

The hierarchy is very flat.  The SmiScnModel class encapsulates the 
relationship between an OsiSolverInterface and the 
SmiScenarioTree<SmiNode> class.  The SmiScenarioTree is just a tree with 
interfaces that allow one to add a "path to leaf" to the tree. 
SmiScenario<SmiNode> is a tree with data elements that are SmiNodes. 
SmiNodes implement the "core block-stoch block" pattern described in the 
SMPS standard.  An SmiScenarioTree<SmiNode> describes a stochastic program 
in the SMPS "scenarios" format.  The SmiScnModel class has methods that 
transform the SmiScenarioTree<SmiNode> structure into an OSI compatible 
linear program, and allow for "scenario-stage" semantics for querying data 
and solutions.

I am thinking of working with SmiScenarioTree a bit to make it a little 
easier to post and retrieve data to nodes.  Probably this will take the 
form of a virtual base class for the post/retrieve functionality.  Does 
anyone have objections to the fact that SmiScenarioTree is templated? 
Should I remove the templating and just use the post/retrieve classes to 
manage data?

So many questions, so little time.

Alan

coin-smi-bounces at list.coin-or.org wrote on 04/06/2005 03:45:18 AM:

> Hi
> 
> I am beginning to use SMI. Since I am new both to object oriented 
> programming and to stochastic programming I have a lot of questions 
about 
> SMI. Just start with one.
> 
> Looking at the automatic documentation, the class hierarchy is quite 
weak 
> and the SmiScnModel class does not appear at all. I guess that the 
> SmiScnModel class should stay on the top of a diagram under which I will 

> put SmiScnData and SmiDiscreteDistribution classes.
> Is this correct or am I wrong (and will study more SMI and C++)?
> 
> Thanks for your answers.
> 
> Before posting this message I give a look at the SMI mailing list 
archive. 
> I don't know why but I did not receive all the messages, so I read only 
> today about the proposal of implementing the first example in Birge and 
> Louveaux book. It is exactly what I am doing, so I can post the SMPS 
> files and the code to solve the model starting from them in my next 
email.
> 
>   Fulvio
> 
> _______________________________________________
> Coin-SMI mailing list
> Coin-SMI at list.coin-or.org
> http://list.coin-or.org/mailman/listinfo/coin-smi
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From kingaj at us.ibm.com  Mon Apr 25 18:50:45 2005
From: kingaj at us.ibm.com (Alan King)
Date: Mon, 25 Apr 2005 18:50:45 -0400
Subject: [Coin-SMI] The first COIN-OR CORS Users Cup Competition
In-Reply-To: <OF5E85FB00.13B38C89-ON85256FE3.00740375-85256FE3.00744299@LocalDomain>
Message-ID: <OF9858BCCE.577105D1-ON85256FEE.007D3814-85256FEE.007D7F88@us.ibm.com>

COmputational INfrastructure for Operations Research 
http://www.coin-or.org

Announcing the first "COIN-OR CORS Users Cup" competition!

The most coveted prize in computational OR --- so coveted in fact that we 
can't locate the person who took it --- so, we are going to award a new 
one! 

 Here are the rules:
1) The submission must contain an argument that the submission is a good 
use-case for COIN-OR. 
2) The submission must be an accepted paper at the 2005  CORS meeting,  
http://myweb.dal.ca/jblake/cors2005/

Submissions will be judged by a committee convened by the CORS Conference 
program committee.  Prize winners will be announced at the CORS 2005 
conference.

The actual awarding of the COIN-OR CORS Users Cup will take place during a 
long ceremony at a congenial locale where cups are needed. 
All entrants and their supporters are welcome to join in the celebration 
and regal (rile)  the prize winners. 

/** Come on -- enter and try to win! **/

Please send submissions to kingaj at us.ibm.com  ---  see you at the 
cup-raising!


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