极限函数

Takingthe contact stress, bend stress stiffness and temperature stress as thecondition, taking the weight of the kiln tyre as optimization aim function, theredia and the width of the tyre are optimized General optimize methods justconsider the affecting of the parameters to aim function, but in fact,structural parameters(such as structure dimension, interval and so on),physics and dynamics (damp factor, conduct factor, friction factor material'selastic module strength limits and so on), which would be changed afterused.

一般的优化方法，仅仅考虑了参数对其目标函数的影响，而实际情况下有些参数是变化的，产品的结构参数、物理和力学参数如阻尼系数、传导系数、磨擦系数、材料的弹性模量和强度极限等的设计值与制造后和使用中的实际值会有差异，这种差异称为设计变量和噪声因素的变差。

It shows that the derivative of finite discrete function is locally a pproximate to the one under continuous case.

通过引入最佳平均逼近直线，分别从几何直观和极限情形两个角度，研究了有限离散函数的导数概念的表现。

Diffusion problem of a predator-prey model with Holling typeⅡfunctional capturing function is studied. Stability condition is obtained when diffusion is absent, and the effect on stability of positive equilibrium is studied when diffusion is present. In the end, the problem of existence of limit cycle is proved in the first quadrant when diffusion is absent.

针对一类具有HollingⅡ型功能捕获函数的捕食－食饵模型的扩散问题进行了研究，得到了无扩散时正平衡点的稳定条件，以及扩散存在时对正平衡点稳定性产生的影响，最后证明了无扩散时系统在第一象限存在极限环的问题。

The Research on application of optimization problem in calculous ;2. In this paper, we mainly discuss how to teach calculous , such as limit of sequence of number, Taylor expansion and Fourier expansion, by using mathematical software.

围绕微积分学习中涉及数列的极限、函数的泰勒展开式和傅立叶展开式等几个基本方面，论述如何利用数学软件mathematica进行辅助教学，达到深刻而形象的理解微积分教学中较为复杂的数学概念及数学现象的目的，从而激发学生学习兴趣，促进微积分学习。

We give some equivalent characterizations of Bloch type functions in term of fractional derivative, via studying the relative of growth of the different order fractional derivatives of holomorphic function, including the form of supremum and limit, the form of integral and Carleson measure, which are the generalizations of some known results in the unit disc and in the unit ball.

我们从研究全纯函数分数次导数的增长性入手，利用分数次导数给出了它的一类刻画，包括上确界和极限形式的特征，积分形式的特征以及Carleson测度形式的特征，推广了单位圆盘和单位球上一些已有的结论。

The limit theory of function is one of the most important theories in mathematics, which is also one of the most difficult to understand.

函数极限理论是数学中最重要的理论之一，也是最难理解的一部分内容。

Using the function limit theory established in this thesis, we solve this difficult problem.

我们运用本文中建立的函数极限理论，解决了这一困难问题。

The limit theory of function is one of the most important theories in mathematics. It's also a part of contents which is most difficult to understand.

函数极限理论是数学中最重要的理论之一，也是最难理解的一部分内容。

Using Density Function Theory we receive the ground states of GaN and GaN2 are X 、X2B2 respectively.Murrell-Sorbie analytical potential energy functions of GaN have been derived by using ab initio data and the least-square fitting method, and harmonic frequency, force constant and spectroscopic data also have been calculated.

基于量子化学计算得出GaN和GaN2 基电子态及其离解极限之后，利用计算数据和最小二乘法得到了GaN 的M-S解析势能函数，并计算出各态的谐振频率、力常数和光谱数据。

We say that the corresponding improper integral converges.Otherwise ,the integral is siad to diverge.

这时也称反常积分收敛；如果上述极限不存在，函数在无穷区间上的反常积分就没有意义，习惯上称为反常积分发散。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。