英:[ˌpɜ:mjuˈteɪʃn]
美:[ˌpɜrmjuˈteɪʃn]
英:[ˌpɜ:mjuˈteɪʃn]
美:[ˌpɜrmjuˈteɪʃn]
per·mu·ta·tion
puhr myu teI shn
复数:permutations
permutational (adj.)
词根:permute
adj.permutable 可排列的;能交换的
vt.permute 交换;变更;排列
Noun
1. an event in which one thing is substituted for another;
"the replacement of lost blood by a transfusion of donor blood"
2. the act of changing the arrangement of a given number of elements
3. complete change in character or condition;
"the permutations...taking place in the physical world"- Henry Miller
4. act of changing the lineal order of objects in a group
permutation and combinationn. [数]排列组合
14世纪晚期, permutacioun,“交换,同时变化; 将一件事物、位置、状态等换成另一件事物、位置、状态等”,源自14世纪的古法语 permutacion “变化,转移”,来自拉丁语 permutationem(主格 permutatio)“变化,改变,革命”,是 permutare “彻底改变,交换”的动词过去分词词干的行动名词,来自 per “彻底”(参见 per)和 mutare “改变”(来自 PIE 词根 *mei-(1)“改变,前进,移动”)。1710年,指“由于顺序变化而导致的物体的线性排列”,最初用于数学。
Permutation differs from combination in this, that in the latter there is no reference to the order in which the quantities are combined, whereas in the former this order is considered, and consequently the number of permutations always exceeds the number of combinations. [Century Dictionary]
Permutation 与 combination 不同之处在于,后者没有参考量的组合顺序,而前者考虑了这个顺序,因此排列的数量总是大于组合的数量。[世纪词典]
排列
置换
Middle English permutacioun exchange, transformation, from Anglo-French, from Latin permutation-, permutatio, from permutare
The first known use of permutation was in the 14th century
perniciousadjective
very destructive or harmful
a pernicious disease
perniciousadjective
very destructive or harmful
a pernicious disease
permutationnoun
an ordered arrangement of a set of objects
1 A quadruplet code would have 256 permutations—far more than needed to encode twenty amino acids.
2 Sonny and Cher"-flavored shtick, then put it through permutations that carry them into something far more bizarre than mere "entertainment.
3 All forms of life are created by the different permutation and combination of these basic pairs.
生命现象的多姿多彩,形形色色都是由这些碱基的不同排列组合所造成的.
4 Accessibility and that much more oft-cited dramatic virtue, “relatability,” seem to be the project’s goals, as it attempts to dissect the permutations of despair and unrequited love in Chekhov’s play.
5 But the most fascinating permutations of this have come from Torv and Noble, two of the three main characters around whom the show's own universe spins.
6 Perhaps the traditional musical moment is a casualty of modern life, which seems increasingly hostile to poetry in all its permutations.
7 There are so many permutations and combinations of different instruments you can come up with just by adding another cello.
8 Tyner’s harmonic language was based on quartal chords and pentatonic scales, while Jones played every permutation of threes and fours within the beat.
9 It’s funny, I used to always wait for the really dramatic second half, because the first half of the movement floats around E flat major, gives different permutations of it.
10 Gradually the thrilling precision and permutations, the alternations between motion and stasis, come to feel like a kind of virtuosity, a world of cool perfection you’re sorry to leave.
11 It’s an archaic form, and many permutations of the song exist.
12 More important is, look from the angle of electronics, they think new permutation cannot be run.
更重要的是, 从电子学的角度看, 它们认为新的排列无法运作.
13 It was absorbing enough on its own, never settling for repetition when it could offer permutations or move on.
14 They share permutations on jokes and a preference for smooth execution over fast knockabout stunts.
15 Whatever permutation the diminutive takes, Dr. Alter said, names matter.
16 I became fascinated by the many permutations of race, especially of blackness, the identity I was assigned in America.
17 Other enumeration problems lead us to the study of orbits of permutation groups.
其它的计数问题引导我们去研究置换群的轨道.
18 IQ switching can support high speed permutation with low cost.
基于crossbar的输入交换机能在低成本的条件下支持高速交换.
19 Sonata form involves implicit narrative and forward motion; theme and variations is abstract, about itself, running through a string of permutations and returning to its origin.
20 It would require a very much larger show than this one to begin to gauge its permutations.
3 选定组合
5 交换
commutative trade exchange swap trade-off interchange reciprocity commutation reciprocation switch truck reciprocate bandy permute in exchange mutuality for against pass traffic give change clear shift bargain commute barter counterchange convert exchangeable over niffer crossover crossing-over chop communicate reverse coup
6 互易
7 互换
change interconversion switch exchange interchange counterchange interconvert inversion reciprocity reciprocation toss reciprocate permute permutate
8 排列
arrayed arrayal arrangement lineup disposal disposition range place lay arrange dispose marshal permute collocate bring into line line or up combination formation Perm taxis array align stratify size graduate invest pitch line collocation perm assemble layout do display the geography of somewhere line up lay out ordering patterning rank set order geography ordination form string sequence