Re: Fuzzy Risk Analysis


Subject: Re: Fuzzy Risk Analysis
From: Pramit Sarma (pramits@bom8.vsnl.net.in)
Date: Fri May 26 2000 - 15:18:40 MET DST


This looks like a place where Type-2 Fuzzy Sets may be useful. These
were first defined by Zadeh (~1973). Due to uncertain information the
primary MF values are themselves are of (a secondary std. or Type-1)
fuzzy form. A good recent reference is

"Type-2 Fuzzy Logic Systems", NN Karnik, JM Mendel & Q. Liang,
IEEE Trans Fuzzy Sys, FS-7(6), Dec 1999.

Francis Wat wrote:
>
> Hi!!
>
> I am a MPhil student and currently doing a research related to using
> fuzzy logic to assess the overall risk level. Now I already have
> identified a list of risk factors. Through using a style like
> questionnaire, giving lingustic terms for user to input like "high"
> "low" of the that risk factor.
> However, I have problem a this stage:
>
> 1. There are lists of risk factors, it is difficult to determine the
> membership function for each factors because one of the reason is that
> e.g. each organziation may feel different perspective of the high or
> low. If I define the membership in evenly distributed from 5 lingustic
> terms for all risk factors, any problem?? Or have other better method??
>
> 2. The input value is a lingustic term, can I translate the lingustic
> term to a value and doing a inference and defuzzification?
>
> Thanks A Lots.
>
> Francis.
>
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-- 

========================================================================== Pramit 'Jake' Sarma

E-mail: PramitS@vsnl.com [Res] PSarma@ChE.IITB.ernet.in [Lab] W-mail: pramit_s@india.com

Processes + Control, Intelligent & Simulation Systems | P R O C I S S | {Systems + Mathematics}---{Real World Processes} ==========================================================================

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