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I÷a?????y?Dyv  SD" ùS ü? q ?T @a ùS ü 5 0 uh g tx h yu g y hu H tx β ??? =? ? ?? ? ?? =? ? ? ? ? ?? += ? ??? ^ ^ ()sin( ) ()sin( ) uuy kxct hhy kxct =?      0 kcu gkh h yu g y kch Hku β ?=? ? =? ? ?+ = 5No?¥ e?Z?F1 0 £  T ???a Kelvino  6.1  6.2       |YZ_¥~o31      } ? j  T? ¤             ? a  T¤1?  h¥Z?    hdh y h ydy c β? ==? ?    31  2 0 exp( ) 2 y hh c β =?   ??  a  T¤ 2 cgH=  bm ??á ì) ?¥ ^ ?? ? 7?1 u'á ?h D¥ ,FMWJO o' y→∞ H 0h→ 5? D ?1?′ D ' cgH=  ?[ ,FMWJOo ^B?_ê.l¥× ?8?o b éB? V¤  2 0 [exp( )]sin ( ) y hh kxct c β =? ?   2 1/2 0 ( ) [exp( )]sin ( ) gy uh kxct Hc β =??    ) ?  u? ? `Dvè0?? I÷a?????y?Dyv  SD" ùS ü? q ?T @a ùS ü 6 ?a? (1??s? úa?aì @?? ?ü?í?a? ?@11" 7úa?a ì @¥??)?a?? ?@11" .à? ?<°??aLb   m 7:óo¥ ??ê ]?? @?s?  ,FMWJOoK*?C?Zb  ??ê? ZM? ?Zá5,FMWJOo¥ ? "??Zá?íb o ?Zá¥B?Z_.l V? Zá?íμK £ê¥M?b  ?4 £{ ??? 3a?Z¥? " - a¥ £{ ??? 3a?Z¥+??1 1 £{ ?? 3?¥?ii?a?×?V'  @? | ?  ^ ITCZ? D ?? MTC?? ù¥ ?b 2 ???Z¥?ii8?× ? =o?×? V?s3 d ??¥?ZV?b 3 £{ ??? 3 a?Z¥?ii?= ?Hq?×? 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