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2

δ

(

t/n

)

n

,

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δ(h) = 1

−

e

−

hk

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÷ D/L &/D/:?ã¡äç%76ä

h

= ln

k/k

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0

< h

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ln

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−

1/k

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δ(h)

í¢D¥äç?í™ã í¢DzäLN95876ìZ÷qJMHîäç/L9@?D?D?í¢D?Féäí¢BðL­H6æäç/L­76ì¢FIH>9í¢äç?Bí™ãLãäí¢BO76äL:Ó76ä

O((2

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−

ln

k/k

−

1

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₊

₎

n

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.

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k

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t

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2t

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n

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F

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f

(x

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k

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.

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k

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(a

11

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1

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(a

s

1

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sk

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f

(a

i

1

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1

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k

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í™ã­7ïãH>ì¢@?äí™H>DöäH

.

Z/¡íbæ176D/:ÊH>D?ì¢êéíbæí¢äí™ã7îãc76äí™ãSæ`êMí¢D?FO7>ããí¢F8D?BðLNDsäæXH>9äç/L­èH>D<_l@?D/èNäí¢5IL®D/H>9BO76ì]æXH>9B

F

f

= (x

a

1

11

∨

. . .

∨

x

a

1

k

k

)

∧

. . .

∧

(x

a

s

1

1

∨

. . .

∨

x

a

sk

k

),

óç/LN9L­ó¡L­:?LND/H>äL

x

a

=

(

x,

íbæ

a

= 0,

¯

x,

íbæ

a

= 1,

äç%76äåí™ã

x

a

_{= 0}

íbæK76D/: H>D?ì¢ê(íbæ

x

=

a

÷ í¢5ILND¨äç/LãêAãäLNB H6æKLüz@%76äí™H>D/ã

.

0/H>D/LéèH>D/ãä9@/èNäãå7

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F

óç?í™èçÓí™ã,7åèH>D<_l@?D/èNäí™H>D H6æ

F

f

i

÷

D/LD/Haó ãLLãäç%76ä

(b

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.

0/íbæ•76D/: H>D?ì¢êÊíbæ1äç?í™ã=5ILèNäH>9í™ãK7éãV76äí™ãSæ…êsí¢D?F7>ããí¢F8D?BðLNDsä,æXH>9

F

÷ õz5Mí™H>@/ãì¢êIý]76Dzê

k

lJMù ë?9H>õ?ì™LNB BO7‘êïõL9LNë?9LãLNDsäL:ÊõzêÊ7åãêAãäLNB H6æ

k

lJMù

.

æXH>9

k

≥

3

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76D/:ð9V76D/:?H>Bîí-,‘L:éL?7>èNä•76ì¢FIH>9í¢äç?Bðã£æXH>9

k

lJMù ÷ *ç/LãLL]H>9äã19Lã@?ì¢äL:ðí¢Dé7Dz@?BõqLN9¡H6æ‡:?LLNëé76D/: ëqHaó•LN9Sæ…@?ì*äLèç?D?í™üs@/Lã®æXH>9ãVH>ì¢5sí¢D?F©JMù LOèNí™LNDzäì¢êI÷ =í™èLOL/76Bîë?ì™LãH6æ,ã@/èç¨äLèç?D?í™üs@/Lãð769Lðäç/L

75Mí™ã(@?äD%76B 76ì¢FIH>9í¢äç?BÊý1Jsç>D?í¢D?F ‡HMè‘76ì*JML‘769èVç 76D/:ò;=76D/:?H>B ò76ì¢ñMãa÷”JMù ôH>D

n

58769í–76õ?ì™Lã è‘76D(õLåä9í¢5sí–76ì¢ì¢êöãH>ì¢5IL:©í¢D©äí¢BðL

O(2

n

)

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O(c

n

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76ì¢FIH>9í¢äç?B æXH>9

c <

2

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k

äç/LN9Lî769LB®@/èVçöæX7>ãäLN976ì¢FIH>9í¢äç?BðãKæXH>9

k

lJMù óí¢äç

c

=

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k

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‰÷

Js@/èçÓõqH>@?D/:?ã,769L­ó•H>9ãä,è‘7>ãVLLãäí¢BO76äí™H>D/ã,äHåäç/L­ë?9H>õ?ì™LNBH6æãVH>ì¢5sí¢D?FOLüs@%76äí™H>D/ã

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c

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c

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. . .

. . .

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n

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n

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ý

α

3

≈

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.

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2

2

H

(

α

d)

n

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ý äç/L®ë?9H>õ%76õ?í¢ì¢í¢äGêÓäç%76ä7éèH>D/ãí™:?LN9V76õ?ì™Lë%769äKH6æ1äç/LNBþ769LH6æ*76ì¢FILNõ?9V76í™è:?LNF89LL*éH>9=ì¢í¢D/L‘769Kí™ã,5ILN9ê

ì™H‘ó­÷ ç/LND

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f

i

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Kì¢@?í¢D?Fð76ì¢FIH>9í¢äç?B ãäí¢ì¢ì+F8í¢5ILã7®õqLNääLN9*õH>@?D/:Oí¢Dïäç?í™ã*è‘7>ãL8÷?JMH®í¢ä¡ì™HsH>ñAã•ë?ì–76@/ãí¢õ?ì™LKäç%76ä•äç/LKì–76ääLN9

ç%7>ãFILND/LN9V76ì¢ì¢êÊ7õLNääLN9õqLNç%7‘5sí™H>9,äç%76DÊäç/LæXH>9BðLN9‘÷

+j/Üsá()a%ÚjÛ

*ç/Lí™:?L‘7>ã:?LãèN9í¢õL:ç%75ILõLLND<äLãäL:<H>D<Lüs@%76äí™H>DÄãêAãäLNBðã*9LNë?9LãLNDzäí¢D?FO9L:A@/èL: Z9H>@?D/:Ê5ILN9

ãí™H>D/ã£H6æú•Jq÷ *ç/L=Lüz@%76äí™H>DéãêMãäLNBðãç%75IL,õqLLNDOèN9L‘76äL:O@/ãí¢D?F®äGó•H®ë%769V76BðLNäLN9ã

r

ý8äç/LDs@?B®õLN9 H6æ£9H>@?D/:?ã­76D/:

Lüz@%76äí™H>D/ãK76D/:<58769í–76õ?ì™Lãí¢DÄ7îãêAãäLNBÊý

m

76D/:

n

ýAí™ãäç/LNDÊF8í¢5ILNDÄõzê

n

= 56 + 32

·

ntxt

·

(r

−

2)

m

= 32

·

r

·

ntxt.

*ç/L­L/7>èNä,èH>D/ãä9@/èNäí™H>DÓH6æäç/LãêAãäLNBðãí™ãF8í¢5ILNDÄí¢DÊù,ë?ëLND/:AíÊù÷

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