·µ»Ø

ÌðÐĹ«Ö÷ײ±ùɽ

Ê×Ò³
¹ØµÆ
»¤ÑÛ
×ÖÌ壺
´ó
ÖÐ
С
ÕÒ²ç(1/2)
   ´æÊéÇ© Êé¼Ü¹ÜÀí ·µ»ØÄ¿Â¼
    ¡°ÄãÃÇÁ½¸öÔõô¹Ö¹ÖµÄ£¿»¹ÓÐÄãÁ³ÉϵÄÕâ¸öÊÇ¡­.?¡±³þÌìÑôºÃÆæµØÎʵÀ¡£

    ¹¬Á躮µÉÁËÎÒÒ»ÑÛ£¬

    ¡°Ã¨×¥µÄ£¡¡±ÓëÆä˵ÊÇÎÒÅçµÄÄÌÌ̵½µÄ»¹²»Èç˵ÊÇèץµÄÓÐÃæ×Ó£¬ËµÍêËû¾Í»Øµ½ÁË×Ô¼ºµÄ×ù룬¶ø³þÌìÑôµÄÉñÇé±ðÌáÓжයÁË£¡ÃÔ»óÓÖÞÏÞλ¹ÓÐЩ²»ÖªËù´ë£¬¹þ¹þ~

    ¡°Ð¦Ê²Ã´£¿¶ÔÁË£¡Ð¾Ù»£¡½ñÌì·ÅѧÄãûÓÐÊÂÇé°É£¡ÎÒÃÇÒ»Æð³Ô·¹°É£¡ÎÒ¿ÉÊÇÈÃÎÒÃǼҳøÊ¦¸øÄã×öÁË¡­¡­¡±

    ¡°¶÷¶÷~ºÃ°¡£¡¡±ÎÒÌý×ÅÄÇЩÈÃÎÒ¿ÚˮֱÁ÷µÄ·¹²Ë£¬ÊµÔÚÊÇÊܲ»ÁËÓÕ»ó¡£

    Í»È»¸Ð¾õ±»Ê²Ã´×§ÁËһϾÍÔÔµ½×ùλÉÏÁË£¬Ì§ÆðÍ·¹¬Á躮ÕýºÚ×ÅÁ³¿´×ÅÎÒ£¬¶ø³þÌìÑô»¹ÔÚÄÇÀïÔ­µØÕ¾×Å£¬·Â·ðû·´Ó¦¹ýÀ´Ò»°ã¡£

    ¡°ºÙºÙ~²»ÊÇÎÒÑûÇëËû£¡ÊÇËûÑûÇëÎÒ£¡¶øÇÒ»¹ÓкܶàºÜ¶àºÃ³ÔµÄ²ËÄØ£¡Äã¶à²»ÈÃÎÒ³Ô£¡¡±ËûµÄÁ³É«Ô½À´Ô½°µÁË£¬ÎÒÔò¹Ô¹ÔµÄ±ÕÉÏÁË×죬¸ÐÊÜ×ÅÖÜΧ¿ÕÆøµÄѹÒֺͺ®Àä¡£

    ¡°Èç¹ûÄãÔÙ˵£¬½ñÍíÄã¾Í¶ËÞ½ÖÍ·£¡²»ÒªºÍÎһؼң¡¡±Õâ¾ä»°Ëµ³öÀ´ÈÃËùÓеÄÈËÈ«²¿ÖØÐÂ̧ÆðÁËÍ·£¬¾ªÑȵĿ´×ÅÎÒÃÇ£¬ÎÒÕæÊÇÎÞ·¨ÐÎÈÝ´Ëʱ´Ë¿ÌµÄÐÄÇ飬ËûÊDz»ÊǹÊÒâµÄ£¿ÎªÊ²Ã´·ÇÕâÑù£¿£¡

    ¡°ÄÇÎҾͲ»»ØÁË£¡³þÌìÑô£¡ÎÒ½ñÍíסÄã¼Ò£¡¡±Õâ¾ä»°ÄÑÃâÒ²»áÈôó¼ÒÎó»á£¬¾ÍÁ¬³þÌìÑô×Ô¼ºÒ²Õ𾪵ij¤´óÁË×ì°Í¡£

    ¡°°¡£¿£¡Å¶£¡¡±Ëû²»ÖªµÀ¸ÃÔõô»Ø´ðÖ»ÓÃÁËÕâÁ½¸öÓïÆø´Ê£¬ÎÒ²»Àí»á¹¬Á躮ÄÇÕųô³ôµÄÁ³£¬¼Ù×°µÄ¿´ÆðÁËÊ飬¶øËûҲûÓÐÔÙ¿´ÎÒÒ»ÑÛ¡£

    ¡°Ä°Ð¾Ù»£¿Ä°Ð¾Ù»£¡ÆðÀ´»Ø´ðÕâ¸öÎÊÌâ¡£¡±Ìýµ½ÊýѧÀÏʦ´ÈÏéµÄÉùÒô£¬ÎÒÓÐЩ²ü¶¶£¬ÌìÏþµÃÎÒµÄÊýѧÊǶàôÀð¡~£¡²»ÖªµÀΪʲôÕâô¶àѧ¿Æ£¬Æ«Æ«ÊýѧÊÇÈõÏÎÒ·¢ÔεĿ´×ÅÄÇÒ»´®´®ÈÃÎÒÍ·Õ¨µÄÊý×Ö£¬ÕæÏëµ±³¡»èµ¹°¡£¡

    ¹¬Á躮µÄÊÖÄñÊˢˢµÄдµ½ÁËÖ½ÉÏÈ»ºó·Åµ½ÁËÎÒµÄÃæÇ°£¬ÎÒ³Ã×ÅÀÏʦ²»×¢Ò⣬µÍÍ·¿´ÁËÒ»ÑÛ£¬¸Ïæ˵³öÁ˴𰸡°f(t)=2exp(-3t)u(t)-exp(-2t)u(t)¡±

    ¡°¶÷~²»´í£¡×øÏ°ɣ¡¡±ÎÒÅÄ×ÅÐØ¿Ú×øÁËÏÂÀ´£¬¾ª»ê䶨°¡£¡

ÕÒ²ç(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ
ÉÏÒ»Õ Ŀ¼ ÏÂÒ»Ò³