09
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ÉèÏëÒ»¸öÃûΪhttp://www.dsxy.org µÄÍøÕ¾£¬±»Á´½ÓÖÁPRֵΪ1£¬ÍⲿÁ´½ÓÊýΪ9µÄÍøÕ¾315china.net£¬Ôò¼ÆË㹫ʽÈçÏÂ:
PR(AKA) = (1-0.85) + 0.85*(1/10)
PR(AKA) = 0.15 + 0.85*(0.1)
PR(AKA) = 0.15 + 0.085
PR(AKA) = 0.235
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¡¡¡¡ÔÙÈÃÎÒÃÇ¿´¿´Èç¹ûÎÒµÄÍøÕ¾»ñµÃµÄÊÇÒ»¸öPR·ÖֵΪ8£¬ÍⲿÁ´½ÓÊýΪ16µÄÍøÕ¾µÄÁ´½Ó£¬ÄÇôÎÒ½«»ñµÃµÄPR·ÖÖµ½«ÊÇ:
PR(AKA) = (1-0.85) + 0.85*(8/16)
PR(AKA) = 0.15 + 0.85(0.5)
PR(AKA) = 0.15 + 0.425
PR(AKA) = 0.575
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PR(AKA) = (1-0.85) + 0.85*(0/10)£¬Ò²¾ÍÊÇ˵£ººóÃæµÄÕⲿ·Ö + 0.85*(0/10)£¬ÎÒ²»ÒªÁË¡£ÎÒÖ»Òª»ñµÃÕâ¸öÍøÕ¾µÄ0.15¸öPRÖµ¾Í¿ÉÒÔÁË£¬Ò²¾ÍÊÇ˵£ºÎÒÖ»Òª°Ñ100¸öÍøÕ¾¹±Ï׸øÎÒÍøÕ¾µÄ(1-0.85)*100=15£¬ÄÇô˼û¹ýGOOGLE PR=15µÄÍøÕ¾£¿
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