·¢²¼Ê±¼ä : ÐÇÆÚÈý ÎÄÕµç»úÉè¼Æ¹¤³Ì¾«»ª°æ¸üÐÂÍê±Ï¿ªÊ¼ÔĶÁ
¾ØÐβ۳ߴ缰³Ý²¿´Å³¡Ç¿¶È·Ö²¼ ÓÃͼ½â·¨Çóȡʵ¼Ê³Ý´ÅÃܺÍÏàÓ¦´Å³¡Ç¿¶È
£¨¶þ£©³Ý´ÅÃÜ´óÓÚ1.8TµÄ³¡ºÏ£¨¶ÔÓÚÈÈÔþ¸ÖƬ£© 1£®ÎªÊ²Ã´²»ÐУ¿
µ±³Ý´ÅÃܳ¬¹ý1.8T£¬Õâʱ³Ý²¿´Å·±È½Ï±¥ºÍ£¬ÌúµÄµ¼´ÅÂÊϽµ£¬´Ëʱ³Ý²¿´Å×èÓë²ÛµÄ´Å×èÏà²î²»´ó£¬´Åͨ´ó²¿·Ö½«ÓɳÝͨ¹ý£¬Ð¡²¿·ÖÔò¾¹ý²Û²¿½øÈëé¡£Òò´Ë°´ÉÏÃæ·½·¨À´ËãµÄ±Èʵ¼Ê³ÝµÄ´ÅÃÜ´ó£¬Ëã³öµÄ³Ý²¿´ÅÃܼ°´Åѹ½µ¶¼»á´óһЩ¡£ 2£®Êµ¼Ê³Ý´ÅÃܼÆËã·½·¨ ¢Ù Ò»¸ö³Ý¾à·¶Î§ÄÚ´Åͨ?t£º
?t??tx??sx ¢Ú ´ÅÃÜBt£º
?t?tx?sx??StxStxStx?sxStx???³ÝÊÓÔÚ´ÅÃÜ,¼ÙÏëÒ»¸ö³Ý¾à·¶Î§ÄÚÈ«²¿´Åͨͨ¹ý³Ý Btx??Bt? BtxBtx??³Ýʵ¼Ê´ÅÃÜ
?sx?sxSsx???Bsx?ks??0Hsx?ks StxSsxStx??Btx??0Hsx?ks?Btx½üËƼÙÉèÔ²ÖùÐαíÃæΪµÈ´ÅλÃæ,¹ÊHsx?Htx?Ht
33
??Btx??0Htx?ksBtx Bt??Bt??0Ht?ks
??Btx?1.257Ht?ksBtx ¡àBt??Bt??1.257Ht?ks ¢Û ´Å³¡Ç¿¶ÈHt£º
Bt??1.257Ht?ksÊÇÏÂÇãµÄÖ±Ïß·½³Ì£¬Ö±ÏßбÂÊΪ1.257ks£¬¿ÉÓÃ(??arctg1.257ks)×÷ͼÇóµÃBt?Ht?Ft?HtLt
???Ht?Ft?HtLt »ò£ºks£¬Bt??²éÇúÏᛚ ksÈçºÎÇó£º
ÓÉͼֱ½Ó²éµÃHt£¬ÔÚ²»Í¬ksÇé¿öÏ£¬B??f(Ht)ÇúÏß¡ú²é³öHtÖµ¡£ ¶þ¡¢³ÝµÄ´Å·³¤¶ÈLt
¶Ôÿһ¼«µÄ´Å·¶øÑÔ£¬¶¨×Ó»òת×ÓµçÊà³ÝµÄ´Å·¼ÆË㳤¶È£¬°´¹¤³§Ï°¹ß¡£ ¢Ù Ö±Á÷µç»úµçÊàÀæÐβۣ¨»òÀàËƲۣ©
2 Lt?h22?(r22?r12)31 Lt?h11?h21?r212(?r´¦³Ý¿í´ó,´ÅÃܵÍ,ÉÙËãÒ»²¿·Ö³Ý¸ß)
¢Ú Òì²½»úÀæÐβۣ¨»òÀàËƲۣ©
(?r´¦³Ý¿í´ó,´ÅÃܵÍ,ÉÙËãÒ»²¿·Ö³Ý¸ß)
(ºöÂÔ²Û¿Ú´¦´Åѹ½µ)
¢Û ¶Ô°ë¿ª¿Ú²Û£º Lt?h1?h2¢Ü ¶Ô¿ª¿Ú²Û£º Lt?hs
¡ì3-4 é´Åѹ½µµÄ¼ÆËã
¼«Áªé´Åé£ºÖ±Á÷µç»ú¶¨×Óéת³¡Ê½Í¹¼«Í¬²½µç»úת×Óéî
éîµÄÀàÐÍ ³ÝÁªéÐÄé£ºÒì²½µç»ú¶¨×ª×Óéî¡¢ ½»Á÷µç»ú³ÝÁªéî
ͬ²½»ú¡¢Ö±Á÷»úµçÊàéî Ö±Á÷µç»ú³ÝÁªéî
ÉÙ¼« ¡ª¡ª éîµÄ´Å·³¤¶È½Ï³¤£¬éî´Åλ½µ½Ï´ó£»
34
¶à¼« ¡ª¡ª éîµÄ´Å·³¤¶È½Ï¾Ø£¬éî´Åλ½µ½ÏС¡£
Ò»¡¢¼«Áªéî´Åѹ½µµÄ¼ÆËã 1¡¢éµÄ´Åͨ
? ´Å¼«µÄ´Åͨ£º?m???????(1??)?????Ö±Á÷»ú:??1.15?1.2?10? ?ͬ²½»ú:??1.35??1???? ´ÅéîµÄ´Åͨ£º?j??m 2?m¡£ 2?m¾¹ý´Å¼«·Ö³ÉÁ½Â··Ö±ð½øÈë×óÓÒÁ½±ßé¾¹ý¼«Áªéîÿ¸ö½ØÃæÖ®´ÅͨÊýÈÏΪ¶¼ÊÇ
2¡¢éµÄ´ÅÃÜ Bj??jSj?m?2 hjLjhj??éî¸ßLj??éîµÄÖáÏò³¤¶È,ÈçÓñ¡¸ÖƬ³åµþ,ÔòSj?kFeLjhj
3¡¢ÓÉBj?Hj4¡¢éî´Å·³¤¶È Lj?(²é´Å»¯ÇúÏß)
?Djav12p?2(Ò»¸ö¼«´Å·³¤)DjavÊÇéîµÄƽ¾ùÖ±¾¶
5¡¢éµÄ´Åѹ½µ F?HjLjLj??Djav12p?2)Djav?Djmax?Djmin2
¶þ¡¢³ÝÁªéî´Åѹ½µµÄ¼ÆËã
£¨Ò»£©½»Á÷µç»úµÄ³ÝÁªéîµÄ´Åѹ½µ 1¡¢ÓëÇ°ÃæÓкβ»Í¬
½»Á÷µç»úµÄ³ÝÁªéîÔÚÒ»¸ö¼«¾àµÄÆø϶´Åͨ·ÖÉ¢µØ½øÈë³Ý²¿¼°é£¬ËùÒÔ¾¹ýÓɳݴÅéî¸÷¸ö½ØÃæ´©¹ýµÄ´ÅͨÊDz»Í¬µÄ£¬¼´ÑØé»ý·Ö·¾¶ÉϵĴÅÃÜ·Ö²¼²»¾ùÔÈ£»²¢ÔÚÿһ´¦µÄ½ØÃæÖÐÑؾ¶ÏòÉϵĴÅÃÜ·Ö²¼Ò²ÊDz»¾ùÔȵġ£
´Å¼«ÖÐÐÄÏßÉÏ£º??0Bj?0
35
¼«¼äÖÐÐÄÏßÉÏ£º???m2B?Bj
¿¿½üÄÚ¾¶´Å·¶Ì£¬´Åͨ¶à£¬´ÅÃܸߣ» ¿¿½üÍ⾶´Å·³¤£¬´ÅͨÉÙ£¬´ÅÃܵ͡£ 2¡¢ ¼ÙÉè
¢Ù ¼ÙÉèÒÔéƽ¾ù»¡³¤£¨Ã¿¼«£©×÷ΪéîµÄ´Å·¼ÆË㳤¶ÈLj ¢Ú ¼ÙÉèé½ØÃæÉϸ÷µã´ÅÃÜÑذ뾶·½Ïò¾ùÔÈ·Ö²¼Bj ¢Û ÈçÒì²½»ú¸ºÔØʱµÄ´Å·£¬ºöÂÔ²Û©´ÅµÄÓ°Ïì¡£ 3¡¢ ¼ÆËã
¢Ù éµÄ´Åͨ?j
x??´¦£¨ÏàÁÚÁ½¼«ÖÐÐÔÏßÉÏ£©£º´ÅͨΪ?2£¬´ÅÃÜΪ×î´ó£»
2?x?0 ´¦ £¨´Å¼«ÖÐÐÄÏßÉÏ£©£º´Åͨ½Ó½üÓÚ0£¬´ÅÃÜΪ0¡£
0~(?)ÖÐÈÎÒâéî½ØÃæSxµÄ´Åͨ:2??j(x)?lef??B(x)dx
x0¢Ú éµÄ´ÅÃÜ
éÇÐÏò´ÅÃÜÓëéî½ØÃæ´¹Ö±
Bj(x)??j(x)lef?kFeh?ljkFeh?lj?B(x)dxx0?0µ±x??:Bj?2kFeh?ljÆäÖÐ:?lef??2B(x)dx??2kFeh?lj
D1?Di1r21??¶¨×ÓÔ²µ×²Û:h??h?js1?23 h?j??éî¼ÆË㳤¶È?D2?Di2r222?ת×ÓÔ²µ×²Û:h?j??hs2??dv2233?lj??éîÖáÏò³¤¶Èlj?lt?Nvbvdv2??ת×ÓÖáÏòͨ·çµÀÖ±¾¶,ÈçÎÞͨ·çµÀ,dv2?0
Èôת×ÓÌúÐÄÖ±½ÓÌ×ÔÚÖáÉϵÄÁ½¼«Òì²½»ú£¬×ª×ÓµçÁ÷ƵÂʵͣ¬²¿·Ö´ÅͨÉøÈëתÖᣬ´Ëʱ
1D2?Di2r2?3hj??hs2?22?dv2
233¢Û é´Åѹ½µ
ÓÉÓÚ³ÝÁªéîÖдÅÃÜ·Ö²¼²»¾ùÔÈ£¬È«³¤µÄéî´Å·µÄ´Åѹ½µÐè¸÷¶ÎÏà¼Ó£¬Ì«Âé·³¡£´ÓµÈЧ´Åѹ½µ³ö·¢£¬ÓõÈЧ´Å³¡Ç¿¶ÈÀ´¼ÆËã¡£
36