Knowledge Representation for Stochastic Decision Processes

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時(shí)間:2019-08-01

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1、KnowledgeRepresentationforStochasticDecisionProcessesCraigBoutilierUept.ofConiputerScience,UniversityofBritishColumbia,Vancouver,BCV6T124,CAKADAcebly@cs.ubc.cuAbstract.Reasoningaboutstochasticdynamicalsystemsandplanningunderuncertaintyhascometoplayafundamentalrolei

2、nA1researchandapplications.Therepresentationofsuchsystems,inparticular,ofactionswithstochasticeffects,hasaccordinglybeengivenincreasingat-tentioninrecentyears.Inthisarticle,wesurveyanumberoftechniquesforrepresentingstochasticprocessesandactionswithstochasticeffects

3、usingdyriilrriicBayesiannetworksandinfluencediagrams,andbrieflydescribehowt,hesesupporteffectiveinferencefortaskssuchasmoni-toring,forecasting,explanationanddecisionmaking.Wealsocomparethesetechniquestoseveralact,ionrepresentationsadoptedintheclassicalreasoningabou

4、tactionandplanningcommunities,describinghowtra-dit,ionalproblemssuchastheframeandramificationproblemsaredealtwithiristochasticsettings,andhowthesesolutionscomparetorecentapproachestothisproblemintheclassical(deterministic)literature.Wearguethatwhilestochasticdynami

5、csintroducecertaincomplicationswhenitcomestosuchissues,forthemostpart,intuitionsunderlyingclassicalmodelscanbeextendedtothestochasticsetting.1IntroductionWithinartificialintelligence,increasingattcntionhasbeenpaidt.otheproblemsofthemonitoring,forecastingandcontrolo

6、fcomplexstochasticprocesses.WhileclassicalplanninghashistoricallybeentheprimefocusofthoseinA1interestedincontrollingdynamicalsystems,researchershavecometorea.lizethatmany(ormost)realisticproblemscannotbeadequatelymodeledusingtheassumptionsofclassicalplanning.Specif

7、ically,oneisgenerallyforcedtoconsideractionswithnondet,erministicorstochasticeffects,processesinwhichexogenouseventsoccur,incompleteoruncertainknowledgeofthesystemstate,impreciseobservationsofthesystemstate,problemswithill-definedgoalsormultiple,possiblyconflict-in

8、gobjectives,andon-going(possiblynonterrninating)processeswithindefinitehorizon.St,ochasticanddecisiontheoret,icplanning[17,19,51attemptstoincorpo

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