OEF ¶¨»ý·Ö --- ½éÉÜ ---

Õâ¸öÄ£¿éÄ¿Ç°°üº¬ 18 ¸ö¹ØÓÚµ¥±äÁ¿¶¨»ý·ÖµÄÀíÂÛÓë¼ÆËãµÄÁ·Ï°.

»¹ÓÐÆäËü¹ØÓÚ¶¨»ý·ÖÓ¦ÓõÄÄ£¿é: OEF ¼¸ºÎ»ý·Ö ÒÔ¼° OEF ÎïÀí»ý·Ö.


¸Ä±ä»ý·ÖÏÞ I

Éè ÊÇÒ»¸öº¯ÊýÂú×ã

¼ÆË㺯Êý

.


¸Ä±ä»ý·ÖÏÞ Ib

Éè ÊÇÒ»¸öº¯ÊýÂú×ã . ¼ÆË㺯Êý

.


¸Ä±ä»ý·ÖÏÞ II

Éè ÊÇÒ»¸öº¯ÊýÂú×ã ¼ÆË㺯Êý

.


»»Ôª I

Éè ÊÇÁ¬Ðøº¯Êý. ΪÁ˶Զ¨»ý·Ö×÷ÈçϵıäÁ¿Ìæ»», ºÍ Ó¦¸Ãȡʲôֵ?


»»Ôª II

Éè ÊÇÁ¬Ðøº¯Êý. ΪÁ˶Զ¨»ý·Ö×÷ÈçϵıäÁ¿Ìæ»», ºÍ Ó¦¸Ãȡʲôֵ?


º¯ÊýÓëµ¼Êý I

ÓпÉ΢º¯Êý , Âú×ã Óë . Öµ ÊÇʲô ?

ÄãµÄ»Ø´ðµÄ¾«¶ÈÖÁÉÙÊÇ 1/10000.


º¯ÊýÓëµ¼Êý II

ÓпÉ΢º¯Êý , Âú×ã

Óë . Öµ ÊÇʲô ?

ÄãµÄ»Ø´ðµÄ¾«¶ÈÖÁÉÙÊÇ 1/10000.


º¯ÊýÓëµ¼Êý III

ÉèÓпÉ΢º¯Êý Âú×ã , ÆäÖÐ Êdz£Êý. ÒÑÖª

Óë ,

µÄÖµÊÇʲô ?

ÄãµÄ»Ø´ðµÄ¾«¶ÈÖÁÉÙÊÇ 1/10000.


ÊýÖµ»ý·Ö

¼ÆËã»ý·Ö

´ïµ½¾«¶È 0.01 %.

Äæ¶àÏîʽ

º¯Êý ÔÚÇø¼ä ÉÏÊÇÁ¬ÐøÇÒÑϸñµ¥µ÷µÄ (ÑéÖ¤), ÆäÖÐ , . ÓÚÊÇÓж¨ÒåÔÚÇø¼ä ÉϵÄÄ溯Êý . ¼ÆËã»ý·Ö

Ìáʾ. ¶ÔÓÚÁ¬ÐøË«É亯Êý , ÓÐ

.


Óö¨»ý·ÖË㼫ÏÞ I

ÀûÓö¨»ý·Ö¼ÆËãÒÔϼ«ÏÞ:

Óö¨»ý·ÖË㼫ÏÞ II

ÀûÓö¨»ý·Ö¼ÆËãÒÔϼ«ÏÞ:


Óö¨»ý·ÖË㼫ÏÞ III

ÀûÓö¨»ý·Ö¼ÆËãÒÔϼ«ÏÞ:


º¯Êýƽ¾ùÖµ

¼ÆË㺯Êý ÔÚÇø¼ä [,] ÉϵÄƽ¾ùÖµ.

Õý¸ºÐÔ II

¼ÙÉèÓÐÁ½¸ö¶¨ÒåÔÚÇø¼ä [0,1] ÉϵÄÁ¬Ðøº¯Êý ºÍ , ʹµÃ . ÔÚÒÔÏÂÓйغ¯Êý ºÍ µÄÐÔÖÊÖÐ, È·¶¨ÄãÈÏΪµÄÐÔÖÊ.

Õý¸ºÐÔ

¼ÙÉèÓж¨ÒåÔÚÇø¼ä [0,1] ÉϵÄÁ¬Ðøº¯Êý , ʹµÃ . ÔÚÒÔÏÂÓйغ¯Êý µÄÐÔÖÊÖÐ, È·¶¨ÄãÈÏΪµÄÐÔÖÊ.

¶¨»ý·ÖÓëÃæ»ý 1

¼ÆËã

.

ÒÑÖª = . ÏÂÃæÊǺ¯Êý µÄͼÐÎ :

xrange -2, yrange , hline 0,0,black vline 0,0,black line 0,,1,,yellow trange 0, plot black,t, trange -2, line 1,,1,,black dline 1,,1,,black line 0,,0,,black text black,-0.2,-0.2,medium,0 text black,0.6,-0.2,medium,1 gridfill ,*4/5,5,5, gridfill /2,*4/5,5,5, transparent yellow

Íê³ÉÒÔϽáÂÛ :

±ê³öÇøÓòµÄÃæ»ý´ú±íµ± Ç÷ÓÚ Ê± µÄ

±ê³öÇøÓòµÄÃæ»ý´ú±íµ± Ç÷ÓÚ Ê± µÄ

¼ÆËãµ± to +infty Óëµ± to 0 ʱ µÄ¼«ÏÞ.

Ô¼¶¨ : ÊäÈëʱÓà inf ´ú±í +infty, Óà -inf ´ú±í - infty ; Èç¹û¼«ÏÞ²»´æÔÚ, Ôò»Ø´ð "no".


¶¨»ý·ÖÓëÃæ»ý 2

Soit . ¼ÆËã .

ÒÑÖª . ÓÉ ¶¨ÒåµÄº¯Êý µÄͼÏñÈçÏ :

xrange -0.2,4*pi yrange -*5/4,*5/4 hline 0,0,black vline 0,0,black plot black, gridfill pi/2,*4/5,10,10,blue gridfill 3*pi/2,*4/5,10,10,blue gridfill 5*pi/2,*4/5,10,10,blue gridfill 7*pi/2,*4/5,10,10,blue

¼ÆËã .

Ô¼¶¨ : Èç¹û¼«ÏÞ²»´æÔÚ, »Ø´ð no; Èç¹û¼«ÏÞÊÇÎÞÇî´ó, »Ø´ð inf.

±ðµÄÀàËÆÁ·Ï°:
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