查询词典 Class Two

Using the concept of Boolean functions and combinatorics theory comprehensively, we investigate the construction on annihilators of Boolean functions and the algebraic immunity of symmetric Boolean functions in cryptography:Firstly, we introduce two methods of constructing the annihilators of Boolean functions, Construction I makes annihilators based on the minor term expression of Boolean function, meanwhile we get a way to judge whether a Boolean function has low degree annihilators by feature matrix. In Construction II, we use the subfunctions to construct annihilators, we also apply Construction II to LILI-128 and Toyocrypt, and the attacking complexity is reduced greatly. We study the algebraic immunitiy of (5,1,3,12) rotation symmetric staturated best functions and a type of constructed functions, then we prove that a new class of functions are invariants of algebraic attacks, and this property is generalized in the end.Secondly, we present a construction on symmetric annihilators of symmetric Boolean functions.

本文主要利用布尔函数的相关概念并结合组合论的相关知识，对密码学中布尔函数的零化子构造问题以及对称布尔函数代数免疫性进行了研究，主要包括以下两方面的内容：首先，给出两种布尔函数零化子的构造方法，构造Ⅰ利用布尔函数的小项表示构造零化子，得到求布尔函数f代数次数≤d的零化子的算法，同时得到通过布尔函数的特征矩阵判断零化子的存在性：构造Ⅱ利用布尔函数退化后的子函数构造零化子，将此构造方法应用于LILI-128，Toyocrypt等流密码体制中，使得攻击的复杂度大大降低；通过研究(5，1，3，12)旋转对称饱和最优函数的代数免疫和一类构造函数的代数免疫，证明了一类函数为代数攻击不变量，并对此性质作了进一步推广。

I have discovered that Eugene to participate in games, action alert, clever mind, which can and classroom on the dead, he a big difference; Yu-kai of this "mischief-making king" of the trick really multi-ah, the children all around him round and round; Xin Yao the next big ah really loud voice lessons and her classes on the "mosquito called" a difference of more than true; Gigi can be serious, and after class and still concentrate on homework; Lulu and SiXian two small heads get together, do not know What does a private message saying ...... the kids sat in the middle, I saw that I had not previously discovered bit by bit.

我发现原来嘉麒参加游戏时，动作机敏，头脑精明，这可和课堂上死气沉沉的他大不一样；宇佳这个"捣蛋大王"的鬼点子还真多啊，小朋友都围着他团团转；欣瑶下课时嗓门还真大啊，和她课上的"蚊子叫"相差真多；琪琪可认真了，下课了还在专心做作业；璐璐和思贤两个小脑袋凑在一起，不知道在说什么悄悄话呢……坐在孩子们中间，我看到了我以前所不曾发现的点点滴滴。

In Beijing, people are accustomed to multi-storey residential and villa into two completely different real estate class.

在北京，人们习惯将多层住宅与别墅化成两个完全不同的地产阶级。

We cosider a class of semilinear elliptic systems with the Neumann boundary value condition by using variational methods, two existences theorem are proved for under critical exponents and critical exponents.

利用变分法讨论了一类带Neumann边界条件的半线性椭圆方程正解的存在性，并得到了在下临界指标时的两个存在性定理。

To avoid the SSS problem, a nonsingular within-class scatter matrix is constructed directly using the original two dimensional image matrix, and DLDA method is used to obtaining the feature matrix in this new algorithm.

该算法在克服小样本问题的同时，不会丢失图像中的有用信息，而且可以避免采用奇异值分解导致的无法精确计算特征向量的问题。

Two first class on the 9: nonstop train to Beijing,please.

请给我两张直北京的9点分的一等票。

I'm gonna have to give you two an NRA class.

我该教导你们上一堂步枪课

Offered in two- and four-wheel drive, with class-leading towing of 7,500 pounds when partnered to the V8, 5,000 pounds with the V6, it offers unmatched capabilities for a weekend of camping and off-roading, just as much as a sophisticated night on the town.

开设在两个和四轮驱动，与同级领先的七五○○磅拖车时，合作的V8发动机，与V6发动机五〇〇〇磅，它提供了一个野营和过周末越野提供无与伦比的功能，就像是一个复杂的多夜晚的城市。

An old-established two-party system is giving way to a far more polarising class divide.

建立多年的两党制正促使阶级划分更朝两极化发展，并且双方都在规避法治。

An old-established two-party system is giving way to a far more polarising class divide. And the rule of law has been circumvented by both sides.

建立多年的两党制正促使阶级划分更朝两极化发展，并且双方都在规避法治。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。