I'm only attaching the pertinent part of the previous email and all I can say is,
"AMEN!!" Some of the guidelines that I usually suggest in the design of any Expert
System is to answer the following questions:
Is this an algorithmic process?
Can the problem be programed in traditional, structured programming language?
Will it be done easier in traditional, structured programming language?
If so you answered these questions yes then do NOT use an expert system.
Especially a rulebased system.
However, if the problem
Takes more than one page to express a decision tree.
Is programmable but highly complex.
(Such as many pages of seemingly conflicting procedures and policies.)
If the logic changes frequently.
If the logic is primarily "rule of thumb" kind of domain expertise.
Then a rulebase or ANN might be desirable.
I agree with Dr. Friedman-Hill, but he has shown himself to be a much nicer (and
far more understanding) person than am I. A calculator problem is a really hideous
way to use Jess or any other Expert System. The person who suggested this should
be taken out, tried, judged and summarily executed by tying their personals to the
high-voltage output of the CRT Aqueduct Power Supply of their computer monitor.
:-)
jco
"Ernest J. Friedman-Hill" wrote:
> I think BPoon wrote:
> > 1) Can i write a function which can convert infix notation of a fraction
> > into prefix or postfix notation in JESS so that i can store the
> > prefix/postifx string into database?
> > Is there any function for stack in JESS? anyone can give me some
> > examples on coding on this problem?
>
> Let me preface this with the comment that using Jess to write a "desk calculator"
> program (that's what I'm assuming you mean here) is a really horrid mismatch
> between capabilities and tasks. Parsing and evaluating expressions is entirely
> deterministic -- there's generally an exact, unambiguous grammar -- and can be
> easily handled using classical parsing techniques. Any introductory
> compiler-writing text will use parsing simple arithmetic expressions as its first
> example program. Using Jess to do this task will be much, much harder. It's like
> using a hammer to cut wood.
ttfn
IHN
Jim
---------------------------------
James C. Owen
Knowledge-Based Systems Corporation
6314 Kelly Circle
Garland, TX 75044
972.530.2895
mailto:[EMAIL PROTECTED]
http://www.kbsc.com
"Tell The Kids I Love Them. -God"
(Seen on a billboard in DFW MetroPlex.)
"NT's lack of reliability is only surpassed by its lack of scalability." -- John
Kirch
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