SAT阅读素材:a learning sysstem
<p> <span word="Learning">Learning</span>, <span word="Rule">Rule</span>, <span word="Environment">Environment</span> <span word="and">and</span> <span word="overall">overall</span> <span word="planning">planning</span> <span word="of">of</span> <span word="a">a</span> <span word="learning">learning</span> <span word="sysstem">sysstem</span></p><p> <span word="The">The</span> <span word="task">task</span> <span word="of">of</span> <span word="learning">learning</span> <span word="from">from</span> <span word="environment">environment</span> <span word="should">should</span> <span word="be">be</span> <span word="specified">specified</span>. <span word="It">It</span> <span word="requires">requires</span> <span word="the">the</span> <span word="learner">learner</span> <span word="to">to</span> <span word="infer">infer</span> <span word="the">the</span> <span word="laws">laws</span> <span word="of">of</span> <span word="the">the</span> <span word="environment">environment</span> <span word="in">in</span> <span word="terms">terms</span> <span word="of">of</span> <span word="its">its</span> <span word="percepts">percepts</span> <span word="and">and</span> <span word="actions">actions</span>, <span word="and">and</span> <span word="use">use</span> <span word="the">the</span> <span word="laws">laws</span> <span word="to">to</span> <span word="solve">solve</span> <span word="problems">problems</span> .</p><p> <span word="Based">Based</span> <span word="on">on</span> <span word="research">research</span> <span word="on">on</span> <span word="problem">problem</span> <span word="space">space</span> <span word="creation">creation</span> <span word="and">and</span> <span word="discrimination">discrimination</span> <span word="learning">learning</span>, <span word="first">first</span> <span word="design">design</span> <span word="an">an</span> <span word="approach">approach</span> <span word="in">in</span> <span word="which">which</span> <span word="exploration">exploration</span>, <span word="rule">rule</span> <span word="creation">creation</span> <span word="and">and</span> <span word="rule">rule</span> <span word="learning">learning</span> <span word="are">are</span> <span word="coordinated">coordinated</span> <span word="in">in</span> <span word="a">a</span> <span word="single">single</span></p><p> <span word="framework">framework</span>. <span word="With">With</span> <span word="this">this</span> <span word="approach">approach</span>, <span word="the">the</span> <span word="system">system</span> <span word="Nell">Nell</span> <span word="creates">creates</span> <span word="certain">certain</span> <span word="rules">rules</span> <span word="by">by</span> <span word="noticing">noticing</span> <span word="the">the</span></p><p> <span word="changes">changes</span> <span word="in">in</span> <span word="the">the</span> <span word="environment">environment</span> <span word="when">when</span> <span word="actions">actions</span> <span word="are">are</span> <span word="taken">taken</span>, <span word="and">and</span> <span word="later">later</span> <span word="refines">refines</span> <span word="the">the</span> <span word="rules">rules</span> <span word="by">by</span> <span word="explaining">explaining</span> <span word="the">the</span> <span word="failures">failures</span> <span word="of">of</span> <span word="their">their</span> <span word="predictions">predictions</span>. <span word="Unlike">Unlike</span></p><p> <span word="many">many</span> <span word="other">other</span> <span word="learning">learning</span> <span word="systems">systems</span>, <span word="nell">nell</span> <span word="treats">treats</span> <span word="learning">learning</span> <span word="and">and</span> <span word="problem">problem</span> <span word="solving">solving</span> <span word="as">as</span> <span word="interleaved">interleaved</span> <span word="activities">activities</span>, <span word="no">no</span> <span word="training">training</span> <span word="instance">instance</span> <span word="nor">nor</span> <span word="any">any</span> <span word="concept">concept</span> <span word="hierarchy">hierarchy</span> <span word="is">is</span> <span word="necessary">necessary</span> <span word="to">to</span> <span word="start">start</span> <span word="learning">learning</span>. <span word="Furthermore">Furthermore</span>,</p><p> <span word="the">the</span> <span word="approach">approach</span> <span word="is">is</span> <span word="capable">capable</span> <span word="of">of</span> <span word="discovering">discovering</span> <span word="hidden">hidden</span> <span word="features">features</span> <span word="from">from</span> <span word="the">the</span> <span word="environment">environment</span> <span word="when">when</span> <span word="normal">normal</span> <span word="discrimination">discrimination</span> <span word="process">process</span> <span word="fails">fails</span> <span word="to">to</span> <span word="make">make</span> <span word="any">any</span> <span word="progress">progress</span>.</p><p> </p>
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