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ÎÒµÄÑо¿·½ÏòÊÇת×Ó¶¯Á¦Ñ§£¬ÂÛÎÄÊǹØÓÚÅöĦϵͳµÄ£¬4Ô·ÝÏò¹úÍâijÆÚ¿¯Í¶¸å£¬×î½üÉó¸åÒâ¼û»ØÀ´£¬Á½¸öÉó¸åÈËÒ»¹²ÌáÁË6ÌõÒâ¼û£¬¶¼±È½ÏÖпϣ¬Ì¸Á˶ÔÎÄÕµÄһЩ¿´·¨¡£ ÆäÖÐÓÐÒ»ÌõÉó¸åÒâ¼ûÊǹØÓÚ¼ÆËã¹ý³ÌµÄ£¬¾ßÌåÈçÏ£º Explain how do you numerically solve the differential equations when the air-gap length is very small. Can you avoid the numerical divergence using your constant time step? ÔÚÎÄÖУ¬ËùÌáµ½µÄair-gap lengthΪ2mm£¬×ª×ÓÖÊÁ¿Á¿¼¶Îª10^5£¬×ªÖá¸Õ¶ÈÁ¿¼¶Îª10^7£¬×èÄáΪ10^5£¬ÅöĦ¸Õ¶ÈΪ10^8¡£²ÉÓõÄÊÇMatlab×Ô´øµÄº¯Êýode45£¬Ñ¡ÔñĬÈϼÆË㾫¶È£¬²½³¤ÎªÃ¿ÖÜÆÚ200²½¡£²¢ÇÒÓɼÆËãµÃÖª£¬ÎÞÂÛ¶¨²½³¤»¹ÊDZ䲽³¤£¬¼ÆËã¹ý³ÌÖж¼Î´³öÏÖ»ý·Ö·¢É¢µÄÇé¿ö£¬×îÖÕµ½´ïÊÕÁ²×´Ì¬¡£ Çë½Ìһϴó¼Ò£¬Éó¸åÈ˵ÄÒâ˼ÊÇ·ñ¶Ô¼ÆËã¹ý³Ì²úÉúÁË»³ÒÉ£¬ÓбØÒªÏòËûÏêϸ½âÊÍÂð(ÎÊÌâÊǺÃÏñûÓÐʲô¿É½âÊ͵ÄÄÚÈÝ£¬ÄÜËãÏÂÈ¥¾ÍÊÇÊÕÁ²£¬²»ÄÜËã¾ÍÊÇ·¢É¢¡£¶øÎÒÊÇǰÕߣ¬ºÇºÇ)¡£Èç¹ûÎÒ°´ÕÕÉÏÃæµÄ·½Ê½¼òµ¥»Ø´ðÊÇ·ñ¿ÉÐС£ |
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2Â¥2012-09-10 15:53:09
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"the air-gap length is very small" ==> Éó¸åÈËÓÐÏë·¨µÄÊÇÕâ¸ö~~ÒòΪËû³Ö»³ÒɵÄ̬¶È~~ ËùÒÔÂ¥Ö÷ÒªÌá³öÄãµÄ¿´·¨~~ "ÎÊÌâÊǺÃÏñûÓÐʲô¿É½âÊ͵ÄÄÚÈÝ£¬ÄÜËãÏÂÈ¥¾ÍÊÇÊÕÁ²£¬²»ÄÜËã¾ÍÊÇ·¢É¢¡£" <=== ÕâÑùµÄ½âÊÍÐв»Í¨~~ ÄãµÄÎÊÌâÓÖ²»ÊÇ 1+1=2 ÊÇÒ»¸öºÜÖ±¹Û²»Óö¯ÄÔ×ÓµÄËãÊõ,...¶Ô²»!? |

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4Â¥2012-09-10 18:08:50
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