ÒҸβ¡¶¾¶¨Á¿(HBV - DNA)ÊÒ¼äÖÊÆÀµÄ½á¹ûΪʲôÐèҪȡLOG...

ÄãºÃ²¡¶¾Á¿Á¿¼ì²éΪËĴη½ Ìáʾ²¡¶¾Á¿Æ«¸ß ÐèÒªÖØÊÓ ÄúÊÇ´óÈýÑô»¹ÊÇСÈýÑô ¸Î¹¦ÄÜÈçºÎ


´óÓïÑÔÄ£ÐÍµÄÆ«¼ûÈçºÎÆÀ²â?

- (P("ºÜºÃ" | "½ñÌì ÌìÆø") = 0.5) Òò´Ë,¶ÔÊý¸ÅÂʺÍΪ: log(0.4) + log(0.6) + log(0.5) ʹÓÃ×ÔÈ»¶ÔÊý(ln)¼ÆËãÿ¸öÏî:- ...


ÒÔ¶þΪµ×ÈýµÄ¶ÔÊýºÍÒÔ0.6Ϊµ×0.4µÄ¶ÔÊýË­´ó?

log23=ln3ln2£¬log0.60.4=ln0.4ln0.6==ln2ln5ln3ln5=ln5ln2ln5...


logµÄ¹«Ê½

ÄúÓ¦¸ÃÕâÑù¼ÆË㣺¼ÆËãÒÔ10Ϊµ×µÄ0.4µÄ¶ÔÊý=-0.398£¬ÒÔ10Ϊµ×µÄ2µÄ¶ÔÊý=0.301£¬È»ºóÁ½ÕßÏà³ý=-0.398¡Â0.301=-1.322¡£


log odd ratioÈçºÎ½âÊÍϵÊýÕý¸ºÒâÒå? - ±à³ÌÓïÑÔ - CSDNÎÊ´ð

ÄâºÏºóϵÊý ¦Â = 0.4ÕâÒâζ×Åÿ¶àÍ£Áô1Ãë,log odds Ôö¼Ó 0.4¡£ÓÉÓÚÖ¸Êýº¯Êýµ¥µ÷µÝÔö:e^(0.4) ¡Ö 1.5 ¼´odds Ìá¸ßÁËÔ¼50%¡£Òò´Ë,¼´...


log0.4µÈÓÚ¶àÉÙ

log0.4ÊÇ0.4µÄ¶ÔÊý£¬ÎªÊÇ0.4£¨Ê®½øÖÆ£©=0.0110011001100110£¨¶þ½øÖÆ£©¡£¶þ½øÖÆÊÇÖ¸ÔÚÊýѧºÍÊý×Öµç·ÖÐÖ¸ÒÔ2Ϊ»ùÊýµÄ¼ÇÊýϵͳ£¬ÒÔ2Ϊ»ùÊý´ú±íϵͳÊǶþ½øÎ»ÖƵġ£


loglogͼÖÐÈçºÎʵÏÖ×ø±êÖáµÈ¾à¿Ì¶È? - ±à³ÌÓïÑÔ - CSDNÎÊ´ð

ͨ¹ýÔËÐÐÒÔÉÏ´úÂ룬ÎÒÃÇ¿ÉÒԵõ½Ò»¸ö´øÓжÔÊý×ø±êxÖáµÄÉ¢µãͼ£¬ÆäÖÐxÖáµÄ¿Ì¶ÈÖµ½«ÒÔ¶ÔÊýÐÎʽÏÔʾ¡£Äã¿ÉÒÔ¸ù¾Ý×Ô¼ºµÄÊý¾ÝºÍÐèÇó½øÐÐÏàÓ¦µÄÐ޸ĺÍ...


Ôõô±È½Ïlog - 0.4(0.5)ºÍ0.5^0.4µÄ´óС?

/(1Ò»lg4)©‚1£¬©S(0.5)0.4=lg0.4/lg0.5=(1Ò»lg4)/(1Ò»lg5>1¡£ËùÒÔ£¬ÒÔ0.4Ϊµ×0.5µÄ¶ÔÊýСÓÚÒÔ0.5Ϊµ×0.4µÄ¶ÔÊý¡£


lg0.4µÄͼÔõô»­

lg0.4µÄͼ»­·¨ÈçÏ¡£1¡¢ÏÈʹÓÃLogº¯Êý£¬Çó³öÊý×ÖÐòÁжÔÓ¦µÄLogÖµ¡£2¡¢È»ºóÑ¡ÔñLogÖµ£¬µã»÷²åÈ룬ѡÔñÕÛÏßͼ¡£3¡¢ÔÚÉú³ÉµÄͼ±íÖÐÓÒ¼üµã»÷ÕÛÏߣ¬Ñ¡ÔñÉèÖÃÊý¾ÝϵÁиñʽ¡£4...


Éñ¾­ÍøÂçÖÐ,Éè¼Æloss functionÓÐÄÄЩ¼¼ÇÉ?

ÈÎȡһ¸öy_{i}£ºBCE LossͼʾÔÚ±êǩΪy=1 µÄÇé¿ö£¨À¶Ïߣ©ÏÂLoss = -log(p(y_{})), µ±Ô¤²âÖµp(y)½Ó½ü1ʱ£¬Loss½Ó½ü0£»µ±Ô¤²âÖµ...


Ïà¹ØËÑË÷

ÈÈÃÅËÑË÷