查询词典 permutations

There are six possible permutations on this sequence: abc, acb, bac, bca, cab, and cba.

这个序列有 6 种可能的排列： abc， acb， bac， bca， cab 和 cba。

Specific decoration and packaging with characteristics of goods is container and adminicle used in the transportation of goods for the discrimination of goods and the convenience in storage and carry;To a ttach text ,pattern,color and their permutations and combinations on product or its packaging as decoration is to identif y the commodity and to beautify it.

一、商品的包装和装潢的特点商品包装是为识别商品以及方便携带、储运而使用在商品上的辅助物和容器；商品装潢是为识别与美化商品而在商品或者其包装上附加的文字、图案、色彩及其排列组合。

Affine inverse function s derived from the inverse function composed with affine permutations possess good cryptographic properties.

有限域上的逆函数左右复合一个仿射置换而成的仿射逆函数具有很好的密码学性质。

Satellite TV and its bedfellow digital technology allows individuals to access, in addition to "ordinary" terrestrial and cable channels, hundreds of TV channels as well as permutations of all broadcast transmission modes, with image and sound quality at previously-unimaginable levels.

除了"普通的"地面频道和有线频道外，卫星电视和它的伙伴数码技术允许许多个人用户得以进入许多电视频道、可以改换所有的电台转播模式，现在可以获得的影像和声音质量水平都是先前无法想象的。

The generalized Walsh spectral characteristics and the generalized auto-correlation function characteristics of orthormophic permutations are studied by using of knowledge about the relation between orthomorphic permutations and vector Boolean functions.

运用向量布尔函数的知识研究了正形置换的广义一阶Walsh谱特征和广义自相关函数的特征，通过正形置换的广义一阶Walsh谱特征给出了正形置换的几种构造方法。

"More than a dozen variable factors could interact, with their permutations running into the thousands"Tom Clancy

"一打以上的可变因素可以相互作用，使它们的排列成成千上万"汤姆·克兰西

Using the theories of probability, algebra, logical function in cryptology and spectral theory comprehensively, the dissertation investigates the properties and constructions of orthomorphic permutations, omni-direction permutations, quick trickle permutations and generalized orthomorphic permutations.

分组密码是现代密码学中一个重要的研究分支，而置换理论在分组密码中占有重要的地位，任何没有信息扩张的密码体制都可以看作是置换的结果，如数据加密标准DES可以看作是明文在密钥控制下的置换，公钥密码体制RSA可以看作是一种多项式置换，因此，研究置换的有关性质和构造具有重要的理论意义和应用价值。

To avoid the permutable model of protein, the 43 Table of Triplet Codes Given by F.H.C.Crick in 1969 is in fact that one group of permutations versus the permutation elements in another group of permutations , which is a typical wrong application and a wrong calculation.

Crick 43 遗传密码表回避蛋白质分子的排列组合模型问题，根据氨基酸种类数20 和 DNA 上碱基种类数 4进行对四元素选三元素的排列组合计算建立" DNA ～蛋白质"间的一一对应，本质上是排列组合应用中一组排列组合对应另一组排列组合的具体元素。

Moreover, an improved upper bound on the average MAP decoding error probability of linear Slepian-Wolf systems for stationary memoryless sources is derived. Based on this improved bound, we analyze the performance of Slepian-Wolf systems based on LDPC codes and random permutations, and prove that under some conditions, all but diminishingly small proportion of LDPC encoders and permutations are good enough for the design of practical Slepian-Wolf systems when the coding length is very large.

然后，论文在相关平稳无记忆信源下推导出线性Slepian-Wolf系统平均MAP译码错误概率的一个改进上界，并在这一改进上界的基础上，分析了基于LDPC码和随机置换的Slepian-Wolf系统的性能，证明了在一定的条件下，当编码长度非常大时，几乎所有的LDPC编码器和置换对于实际Slepian-Wolf系统的设计都是足够好的。

To avoid the permutable model of protein, the 43 Table of Triplet Codes Given by F.H.C.Crick in 1969 is in fact that one group of permutations versus the permutation elements in another group of permutations , which is a typical wrong application and a wrong calculation.

Crick 43 遗传密码表回避蛋白质分子的排列组合模型问题，根据氨基酸种类数20 和 DNA 上碱基种类数 4进行对四元素选三元素的排列组合计算建立& DNA ～蛋白质&间的一一对应，本质上是排列组合应用中一组排列组合对应另一组排列组合的具体元素。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。