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单词 memoryless
释义

memorylessadj.

Brit. /ˈmɛm(ə)rɪlᵻs/, U.S. /ˈmɛm(ə)rilᵻs/
Origin: Formed within English, by derivation. Etymons: memory n., -less suffix.
Etymology: < memory n. + -less suffix.
1. Of a person, attribute, etc.: having no memory.
ΘΚΠ
the mind > mental capacity > memory > faulty recollection > [adjective]
forgetelc1000
forgetful1382
mindlessa1425
obliviousc1450
unremembered1453
immemor1535
unremembering1540
unrecalling1594
immemorious1602
elapsive1652
remindless1657
unrecording1813
unretentive1825
forgetting1847
memoryless1857
1857 J. R. Lowell Let. 14 May in Atlantic Monthly (1892) Dec. 755/1 I am glad you do not forget me, though I seem so memoryless and ungrateful.
1930 G. Manning-Sanders Burnt Man xi. 125 She had helped to nurse this memoryless man back to life.
1979 M. Kolbenschlag Kiss Sleeping Beauty Good-bye p. xiv The faith that is expressed here..is not backward-looking or nostalgic; nor is it blindly iconoclastic and memoryless.
2. Of, relating to, or designating systems (esp. sequences of random variables), in which the value of each element or state is independent of those that have gone before.
ΚΠ
1956 C. Shannon in IRE Trans. Information Theory 2 8/1 We shall consider only finite discrete memoryless channels... The channel being memoryless means that successive operations are independent.
1977 Proc. Royal Soc. B. 199 233 The lifetime of each chemical species present is a memoryless random variable that does not depend on the age of the species.
1988 D. Welsh Codes & Cryptogr. ii. 14 X1, X2..is just a sequence of identically distributed, independent random variables. Such a source is called a zero-memory or memoryless source.
This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022).
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adj.1857
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