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2012-05-02 Wed

#1101. Zipf's law [information_theory][frequency][statistics][language_change][zipfs_law][shortening][pragmatics][zipfs_law]

##1089,1090,1091,1098 εǡ (information theory) ؤͿƤθˤĤơĤƤι׸ȤơǤ褯ΤƤΤ1Ĥˡꥫθؼ George Kingsley Zipf (1902--50) 1949ǯ Human Behaviour and the Principle of Least Effort: An Introduction to Human Ecology ˤ󾧤 Zipf's law åפˡ§ˤ롥٤ˤĤƤηиŪˡ§Ǥꡤ٤ f Ȥ٤ν̤ r Ȥȡ C ϤۤȤʤȤ

r f = C


ˡ§ϡ졤ƥȤμꡤԡ¾θŪѿˤ餺ΩĤȤ뤬ºݤˤ٤ǹ⤪Ӻθ췲ˤĤƤϸ礭Ȥ狼äƤꡤϹ⤯ʤȤȽ¿ޤr ٽ̡ˤʤ f ١ˤ˰¸Ƥꡤf r ΤϼǤ뤫顤ѤͤȤȤȤ϶ä٤ǤϤʤΥȡȥǤȤȽ롥иŪ¤˾Ȥ餷ˡ§ȤޤǤϤ鷺Ȥⷹ褯ɽ路ƤȤȤϤǤŪ˻Ŧյ礭
Zipf's law ȵڸ̤¿ˤ錄롥㤨Сˡ§ˤС٤ι⤤줫餽λ٤߷פƹԤŪθDZٸʬ뤳Ȥ顤ؽܸä˺ͿΤȤʤ롥ޤˡ§Ŭ礷ʤʬۤ򼨤äȤС¾üװͿƤǽȤʾθ٤ޤ˹⤹иäϼ岽ƤȿǤ뤷٤㤤Ϥθ줬٤ѤƤˤȯŪʿ¤äʬɤꤵˡ
Zipf's law ϡʹ֤ιưʤȤ礭ʸ§the Principle of Least Effort ʺǾϤθ§ˤΰǤꡤθؤαѤϡ嵭κǤ褯Τ줿٤ٽδطθΤߤʤ餺¾θƤˤڤǤ롥㤨С٤ȸĹȿδطˤ롤ȤΤ⤢롥ѸñǤ뤳Ȥ¿Ȥ¡ʲʬĴˤĤƤ ##348,349,355 򻲾ȡˤ䡤٤⤯ʤƬʤɤΤ褦û̡ά뤳Ȥ¿Ȥ¤⡤θ롥ۤˤϡϰϤȤ°οδطɽ魯Ĵ񤷤Ǥ٤㤤Ȥ븶§ʤɡˡ§Ͽ¿ cooperative principle ʶĴθ§ˤˤ̤γΧ֡ʤξˤơɬפȤƤʤΡ˾ͿפȤͿ"effort" ʤɤ񤷤꤬ĤäƤꡤޤǾϤʹ֤ιưʤͣθ§ǤȤϹͤ뤳ȤǤʤΰ̤ĤΤȤƽפʳǤ뤳Ȥϴְ㤤ʤ
ʤʸǤϡ嵭Τθ§ Zipf's law ȤƸڤ뤳Ȥꡤޤ Zipf's laws ʣǤޤȤ줿ꡤthe Principle of Least Effort 礵줿ꤹ뤳Ȥ⤢ΤդɬפǤ롥Zipf νɾȤƤ Chao 򻲾ȡŪˡ§ˤĤƤϡCrystal (86--87) 򻲾ȡ

Chao, Y. R. "Review of Human Behaviour and the Principle of Least Effort: An Introduction to Human Ecology by George Kingsley Zipf." Language 26 (1950): 394--401.
Crystal, David. The Cambridge Encyclopedia of Language. 2nd ed. Cambridge: CUP, 1997.

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