ÌâÄ¿ÄÚÈÝ

Èçͼ¼×Ëùʾ£¬ÊúÖ±·ÅÖõĽðÊô°åA¡¢BÖм俪ÓÐС¿×£¬Ð¡¿×µÄÁ¬ÏßÑØË®Æ½·ÅÖõĽðÊô°åC¡¢DµÄÖмäÏߣ¬Á£×ÓÔ´P¿ÉÒÔÁ¬ÐøµØ²úÉúÖÊÁ¿Îªm¡¢µçºÉÁ¿ÎªqµÄ´øÕýµçÁ£×Ó(³õËٶȲ»¼Æ)£¬Á£×ÓÔÚA¡¢B¼ä±»¼ÓËÙºó£¬ÔÙ½øÈë½ðÊô°åC¡¢D¼äƫת²¢¾ùÄܴӴ˵糡ÖÐÉä³ö£¬ÒÑÖª½ðÊô°åA¡¢B¼äµçѹΪU0£¬½ðÊô°åC¡¢D¼äµçÑ¹ËæÊ±¼ä±ä»¯µÄͼÏóÈçͼÒÒËùʾ£¬C¡¢D°å³¤¶È¾ùΪL£¬¼ä¾àΪL¡£ÔÚ½ðÊô°åC¡¢DÓÒ²àÓд¹Ö±Ö½ÃæÏòÀïµÄ¾ùÔȴų¡·Ö²¼ÔÚͼʾµÄ°ë»·ÐδøÖУ¬¸Ã»·´øµÄÄÚ¡¢ÍâÔ²ÐÄÓë½ðÊô°åC¡¢DµÄÖÐÐÄOµãÖØºÏ£¬ÄÚÔ²°ë¾¶R1Ϊ£¬´Å¸ÐӦǿ¶ÈB0´óСΪ£¬ÒÑÖªÁ£×ÓÔÚÆ«×ªµç³¡ÖÐÔ˶¯µÄʱ¼äԶСÓڵ糡±ä»¯µÄÖÜÆÚ(µç³¡±ä»¯µÄÖÜÆÚTδ֪)£¬Á£×ÓÖØÁ¦²»¼Æ£®
(1)ÇóÁ£×ÓÀ뿪ƫתµç³¡Ê±£¬ÔÚ´¹Ö±°å¼ä·½ÏòÆ«ÒÆµÄ×î´ó¾àÀëymax£»
(2)ÈçËùÓÐÁ£×Ó¾ù²»ÄÜ´Ó»·´ø´Å³¡ÓҲഩ³ö£¬Çó»·´ø´Å³¡ÍâÔ²µÄ×îС°ë¾¶R2¡£
   
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
£¨2010?ÐìÖÝÈýÄ££©Èçͼ¼×Ëùʾ£¬ÊúÖ±·ÅÖõĽðÊô°åA¡¢BÖм俪ÓÐС¿×£¬Ð¡¿×µÄÁ¬ÏßÑØË®Æ½·ÅÖõĽðÊô°åC¡¢DµÄÖмäÏߣ¬Á£×ÓÔ´P¿ÉÒÔ¼ä¶ÏµØ²úÉúÖÊÁ¿Îªm¡¢µçºÉÁ¿ÎªqµÄ´øÕýµçÁ£×Ó£¨³õËÙ²»¼Æ£©£¬Á£×ÓÔÚA¡¢B¼ä±»¼ÓËÙºó£¬ÔÙ½øÈë½ðÊô°åC¡¢D¼äƫת²¢¾ùÄܴӴ˵糡ÖÐÉä³ö£®ÒÑÖª½ðÊô°åA¡¢B¼äµÄµçѹUAB=U0£¬½ðÊô°åC¡¢D³¤¶ÈΪL£¬¼ä¾àd=
3
L
3
£®Á½°åÖ®¼äµÄµçѹUCDËæÊ±¼ät±ä»¯µÄͼÏóÈçͼÒÒËùʾ£®ÔÚ½ðÊô°åC¡¢DÓÒ²àÓжþ¸ö´¹Ö±Ö½ÃæÏòÀïµÄ¾ùÔȴų¡·Ö²¼ÔÚͼʾµÄ°ë»·ÐδøÖУ¬¸Ã»·´øµÄÄÚ¡¢ÍâÔ²ÐÄÓë½ðÊô°åC¡¢DµÄÖÐÐÄOµãÖØºÏ£¬ÄÚÔ²°ë¾¶Rl
3
L
3
=£¬´Å¸ÐӦǿ¶ÈB0=
24mU0
qL2
£®ÒÑÖªÁ£×ÓÔÚÆ«×ªµç³¡ÖÐÔ˶¯µÄʱ¼äԶСÓڵ糡±ä»¯µÄÖÜÆÚ£¨µç³¡±ä»¯µÄÖÜÆÚTδ֪£©£¬Á£×ÓÖØÁ¦²»¼Æ£®

£¨1£©ÇóÁ£×ÓÀ뿪ƫתµç³¡Ê±£¬ÔÚ´¹Ö±ÓÚ°åÃæ·½ÏòÆ«ÒÆµÄ×î´ó¾àÀ룻
£¨2£©ÈôËùÓÐÁ£×Ó¾ù²»ÄÜ´Ó»·Ðδų¡µÄÓҲഩ³ö£¬Çó»·´ø´Å³¡µÄ×îС¿í¶È£»
£¨3£©ÈôÔ­´Å³¡ÎÞÍâ²à°ëÔ²Ðα߽çÇҴŸÐӦǿ¶ÈB°´Èçͼ±ûËùʾµÄ¹æÂɱ仯£¬Éè´¹Ö±Ö½ÃæÏòÀïµÄ´Å³¡·½ÏòΪÕý·½Ïò£®t=
T
2
ʱ¿Ì½øÈëÆ«×ªµç³¡µÄ´øµç΢Á£À뿪µç³¡ºó½øÈë´Å³¡£¬t=
3T
4
ʱ¸Ã΢Á£µÄËÙ¶È·½ÏòÇ¡ºÃÊúÖ±ÏòÉÏ£¬Çó¸ÃÁ£×ÓÔڴų¡ÖÐÔ˶¯µÄʱ¼äΪ¶àÉÙ£¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø