类函数

A class containing one or more pure virtual functions is an abstract base class .

含有一个或多个纯虚函数的类是抽象基类。

By utilizing the auxiliary ordinary differential equation and its solutions, the first kind and second kind of KdV equation with variable coefficients were investigated by means of the extended tanh-function method, and abundant new exact solitary wave solutions were obtained under certain conditions.

利用该方程及其解，采用改进的tanh函数展开法研究了第1类和第2类变系数KdV方程，获得了在一定条件下的若干新精确孤波解。

Moreover, the quasi-analytical expressions of the relative concentrations at the mobile region and the immobile region are deduced respectively by using Bessel equation, Bessel function and the method of Laplace transform under the initial concentration zero and the first or second boundary condition of a semi-infinite one-dimensional space.

并分别在初始浓度为零，半无限一维空间内第一类边界条件和第二类边界条件下，利用Bessel方程、Bessel函数和Laplace变换法推导出了可动区和不动区溶质相对浓度的准解析表达式。

The paper draws linear unusual differential equation a_0y~(n+a_1y~(n-1+…+a_(n-1)y′+α_ny=∑mi=0k_iδ~(i from the practical problems in the engineering field of electronic technology,circuit analysis,mechanics of materials,mechanical design and civil architecture,discusses the dependence of the solution of the equation on that of homogeneous,gives the algorithm of the equation,and draws the general algorithm of semi-odd number rank unusual Bessel differential equation.

在电子技术、电路分析、材料力学、机械设计和土木建筑等工程技术领域中，常会遇到一类非齐次项为奇异函数的广义线性微分方程，本文给出这类奇异微分方程的解对齐次解的依赖性，从而得出这类奇异微分方程的解法，求出了半奇数阶奇异Bessel微分方程的通解。如下列应用问题中的微分方

The whole process of text representation were discussed — word segmentation, building stop words list, feature selection, weight computation and generating vector space. Aim at the influence of stop words, a list, which is fit for text categorization, is set up and makes the vector dimension reduce.

针对停用词对分类的影响，建立了适合文本分类的停用词表，使向量维数得到初步降低；对现有特征选择方法进行了介绍和对比，构造了一种适合支持向量机的特征选择函数——基于类内频率的特征选择函数。

Changing formula forms of single-shear, twin-shear and three-shear yield strength criteria, show that many of yield strength criteria of rock and soil materials can be expressed by the τ8 = gf function forms unter the ordinary condition, and that the main differ ences of yield strength value will mainly forcus on the different function forms of gθσ among single-shear, twin-shear and three-shear yield strength criteria.

对岩土体常用的单剪屈服强度准则、双剪屈服强度准则和三剪屈服强度准则进行了系统的论述，通过对单剪、双剪和三剪屈服强度准则进行转化，指出岩土的屈服强度准则一般可表达为τ8=gf的函数形式，阐明了单剪、双剪和三剪屈服强度准则的差异主要表现在g函数的不同，并进一步解释了中间主应力σ2对岩土类材料屈服强度的影响。

The deconstruct function would be used create objects of the class and run their associated adl_postconstruct function.

deconstruct 函数将被用于创建类的对象，并运行其相关的 adl_postconstruct 函数。

This thesis is devoted to the study of 〓-type inequalities for martingales,such as the maximal inequalities,the inequalities for square functions,the inequali-ties for martingale transforms,the inequalities for singular integrals.

第三章证明了关于Hardy平均算子〓的双〓不等式、双〓凸引理，并通过考虑鞅的重排不等式，建立了鞅的双〓均方函数不等式、条件均方函数不等式，给出了这类不等式成立的一个充分必要条件。

Meanwhile,we establishψfunctional stability which is more general than the classical exponential stability and polynomially stability.

我们通过对几类方程的讨论，将不同的渐近稳定性借助于&ψ函数&归结为一种&ψ函数稳定性&。

Based on the thought of the Hyperbola Function Expansion Method, we obtained some analytical solutions of the modified Korteweg-de Vries equation by introducing new expansion functions.

基于双曲函数法的思想，通过选择新的展开函数，得到了modified Korteweg-de Vries 方程的几类精确解，其中一类为具有扭结——反扭结状结构的双扭结单孤子解。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了