Różnice między wybraną wersją a wersją aktualną.
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pl:prolog:pllib:model_bath_tub [2019/06/27 15:50] |
pl:prolog:pllib:model_bath_tub [2019/06/27 15:50] (aktualna) |
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| + | ====== Model bath tub ====== | ||
| + | {{tag>model}} | ||
| + | ===== Description ===== | ||
| + | A qualitative model of bath tub. | ||
| + | |||
| + | **Source**: PROLOG programming for artificial intelligence, 3rd Edition, Harlow, 2001, ISBN 0-201-40375-7. | ||
| + | ===== Download ===== | ||
| + | Program source code: {{model_bath_tub.pl}} | ||
| + | ===== Listing ===== | ||
| + | <code prolog> | ||
| + | % Figure 20.9 A qualitative model of bath tub. | ||
| + | |||
| + | :- op( 900, fy, not). | ||
| + | :- op( 220, xfy, ..). | ||
| + | |||
| + | % not Goal): negation as failure; | ||
| + | % Note: This is often available as a built-in predicate, | ||
| + | % often written as prefix operator "\+", e.g. \+ likes(mary,snakes) | ||
| + | |||
| + | not Goal :- | ||
| + | Goal, !, fail | ||
| + | ; | ||
| + | true. | ||
| + | |||
| + | % A bath tub model | ||
| + | |||
| + | landmarks( amount, [ zero, full, inf]). | ||
| + | landmarks( level, [ zero, top, inf]). | ||
| + | landmarks( flow, [ minf, zero, inflow, inf]). | ||
| + | |||
| + | correspond( amount:zero, level:zero). | ||
| + | correspond( amount:full, level:top). | ||
| + | |||
| + | legalstate( [ Level, Amount, Outflow, Netflow]) :- | ||
| + | mplus( Amount, Level), | ||
| + | mplus( Level, Outflow), | ||
| + | Inflow = flow:inflow/std, % Constant in-flow | ||
| + | sum( Outflow, Netflow, Inflow), % Netflow = Inflow - Outflow | ||
| + | deriv( Amount, Netflow), | ||
| + | not overflowing( Level). % Water not over the top | ||
| + | |||
| + | overflowing( level:top..inf/_). % Over the top | ||
| + | |||
| + | initial( [ level: zero/inc, | ||
| + | amount: zero/inc, | ||
| + | flow: zero/inc, | ||
| + | flow: inflow/dec ] ). | ||
| + | </code> | ||
| + | ===== Comments ===== | ||
