查询词典 class function

Note that when using from package import item , the item can be either a submodule of the package, or some other name defined in the package, like a function, class or variable.

需要注意的是使用 from package import item 方式导入包时，这个子项既可以是包中的一个子模块，也可以是包中定义的其它命名，像函数、类或变量。

Function and class definitions are also syntactically compound statements.

函数定义和类定义在语法上也被看作复合语句。

May only occur syntactically nested in a function definition,not within a nested class definition.

在语法上仅可以出现在函数定义中，不能出现在类定义中。

It is proved by using the function approximation theory and martrix theory that for a degenerate elliptic equation of the first class, if the third boundary value condition is satisfied at its nondegenerate boundary and the given derivative values are satisfied at its degenerate boundary, then its solution is existent and unique.

摘 要 运用逼近理论及矩阵理论证明：如果一类退化椭圆型方程在非退化边界上满足第三边界条件，在退化边界上满足给定微商值，那么它的解是存在且唯一的。

The destructor is a member function with the name of the class prefixed by a tilde. It has no return value and takes no parameters.

析构函数是个成员函数，它的名字是在类名字之前加上一个代字号，它没有返回值，没有形参。

The first unassigned string in a module, class declaration, or function declaration can be accessed using the attribute obj.

在模块，类声明，或函数声明中第一个没有赋值的字符串可以用属性obj。

The corruption of the ruling class severely distorted the operation of the government and society. The function of the national dominance was out of order and corruption was in flood. The honest administration declined completely under the heel of money and violence.

广大统治阶层的腐败严重扭曲了政府和社会的运行方式，国家的统治机能出现故障，腐败肆意泛滥，廉政在金钱和暴力的蹂躏下彻底败亡。

A class of modified BFGS algorithm which satisfies the new quasi-Newton equation is proposed in the paper[1],and the global convergence of the algorithm is proved under the condition that the objective function is uniformly convex.

文献[1]曾在已建立的一类新拟牛顿方程 Bk+1sk=yk-=yk+kγskTsksk的基础上，证明了满足新拟牛顿方程的一类改进BFGS算法在目标函数为一致凸的条件下，具有全局收敛性。

In this paper,several quasi-Newton algorithms are generalized to a class of new quasi-Newton equation,several modified quasi-Newton algorithm s are obtained and their global convergence are proved under the objective function is uniformly convex.

将几个拟牛顿算法推广到一类新拟牛顿方程，得到几个修正拟牛顿算法；在目标函数为一致凸的条件下，证明了它们都具有全局收敛性。

The main contents are as follows.1 For the state control problem in closed quantum systems, according to the distance between states, the error between states and the average value of an imaginary mechanical quantity, three Lyapunov functions are chosen, respectively. The corresponding control law designs and the convergence analyses are studied. Especially, for the Lyapunov function based on the distance between states, a class of control laws that can solve the problem that an initial state is orthogonal to a goal state is designed. The convergence of the system is analyzed via LaSalle\'s principle and one method to find the largest invariant set of the closed loop system is proposed by linearizing the unitary evolution operator at the corresponding instants.

在这一背景下，本论文在指出研究量子系统控制的必要性、回顾量子系统控制理论和方法的研究现状的基础上，从控制理论的角度研究Lyapunov理论和最优控制理论对于封闭量子系统的应用以及开放系统中的若干问题，主要内容包含以下几个方面。1针对封闭量子系统中的状态控制问题，根据状态间的距离、状态间的偏差、一个虚拟力学量的均值，分别选择三种Lyapunov函数进行相应的控制律设计和收敛性分析。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。