表示式

No one seems to know why the addition of a "2" in front of a model number came to denote touchtone in the old Bell System.

看来没有人知道为什么要在老式的贝尔系统电话机型号"500"前面加一个"2"来表示新型的按键式电话。

In the fourth chapter, firstly it introduces the Boolean functions algebraic expressions of the 2-value clock-controlled stop-and-go generator and Gunther generator. It reveals the balanced property of the two kinds of Boolean functions, and studies the Walsh cycle spectrum and the autocorrelation function. It also obtains the coincidence rate of their output sequences with affine sum of some bits of input sequences, and analyzes their ability of resisting the best affine approximation cryptanalysis and differential cryptanalysis. Secondly, we properly present a new definition of the Best Affine Approximation, namely BAA on the Boolean vector functions, followed by the spectral characteristic of such defined BAA attacks through using the decomposition formula of the union distribution for random variables. A lower bound of such BAA attacks is proposed. Finally, we also study the spectral characteristic of the second kind of nonlinearity of Boolean vector functions, followed by a higher bound of such nonlinearity. Furthermore, the limited relationship between the second kind of nonlinearity of Boolean vector functions and the linear structure of the linear combination of every component is analyzed.

在第四章中，首先给出了2值密钥流"停走生成器"和"衮特生成器"中实际存在的布尔函数的代数表示，揭示了这两类布尔函数的平衡性，随后研究了它们的Walsh循环谱和自相关函数等，得到了它们的输出序列与输入序列中的某些bit的仿射项的符合率，分析了它们抵抗最佳仿射逼近攻击和差分攻击的能力；其次，我们合理地给出了布尔向量函数最佳仿射逼近的新定义，利用布尔随机变量联合分布的分解式考察了相应的谱特征，并给出了布尔向量函数与其最佳仿射逼近的符合率的一个下界；最后，我们还考察了布尔向量函数第二类非线性度的谱特征，给出了布尔向量函数第二类非线性度的一个上界，并揭示了布尔向量函数第二类非线性度与其各个分量的线性和的线性结构之间存在的制约关系。

Blow-up of nonnegative radial solutions for a family of parabolic equation s in bounded domain in RN

其中a，b不同时为0直线的一般式方程能够表示坐标平面内的任何直线。

This paper discusses the notices in the design of fast open pressure vessel and puts forward recommendations on calculations of upper and bottom flanges and callipers and demands for draft demonstrations.

对快开门式压力容器设计中的注意事项进行了论述，并对上、下法兰和卡箍的计算和图样表示要求提出了建议。

Firstly, the modified H-R variational principle for elastic material was briefly presented, then the quadratic interpolation functions were used to express the out-plane stresses and displacements variables, consequently the formulation of 8-node isoparametric element for Hamilton canonical equation was derived in detail.

首先简要地介绍了弹性材料修正后的H-R变分原理，然后用二次插值函数表示平面外应力和位移变量，并详细地推导了Hamilton正则方程的八节点等参元列式。

The Ian Drew of marketing vice president of ARM expresses, ubuntu can help newest ARM processor product, will quicken can link a network, super- frivolous can carry type plant gain ground, and be opposite with the collaboration of Canonical development of the function at these online platform device, innovation is helpful.

ARM的行销副总裁Ian Drew表示，Ubuntu能够支援最新的ARM处理器产品，将加速可连网、超轻薄可携式装置的普及，而与Canonical的合作对於这些上网平台装置的功能、创新发展有帮助。

In our work, CFL is used as the data type of a functional programming language for the first time, and the relevant issues such as expression representation and type system are studied, which can be references to related researches.

本文工作首次把CFL作为函数式语言的数据类型，并研究了表达式表示形式和类型系统等有关问题，它们可为相关研究提供参考。

This includes visualizing what it means to do God's will on earth as it is done in heaven; it involves concentrating on being Christlike in all we do.

它包括想像在地上成就神的旨意，如同成就在天上；它表示无论作甚麼事，都努力效法基督的樣式。

Sarimov has got a whole bunch of thoughts about the Kazakhstani cinematograph in general — after the discussion, which mostly took place in the abovementioned LiveJournals.

博客 Sarimov 对哈萨克斯坦电影有诸多意见，在看过大家的讨论后，他表示自己意见为：「过去十多年，我分析许多哈萨克斯坦电影，这大多份是我个人式的自省观察。

This paper implements the symbol analysis of circuit and obtains analytical expression with the powerful symbol operation of the Matlab,provides an efficient assistant method for circuit analysis.

由于用符号表示的解析式比数值解具有更好的

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。