积分公式

In this paper we present the results of a theoretical study of the focusingproperties of a symmetrical two-cylinder lens with identical radii and negligibleseparation for relativistic electron beams.

本文提出相对论情况下双圆筒静电透镜的聚焦性质，得出在薄透镜近似下的解析公式，并给出计算实例及与数值积分计算相比较。

In NWFM,to solve self-consistently the set of DFT Kohn-Sham equations,nuclear weight function is employed for numerical solution of multicenter integra-tion,which decomposes the problem of three dimensional integration to a sum ofone-center,atomic-like integrations.

首先介绍如何利用线性组合的原子轨道方法求解密度泛函理论中的K-S方程；接着详细地说明了核权重函数的概念，并列出了两种常用的核权重函数形式，同时阐述了如何利用核权重函数求解包含多中心积分的矩阵元以及复杂的三维泊松方程以获得电子间库仑势的方法；然后给出了求解矩阵元、有效势以及体系总能的具体数值计算公式。

Secondly, to analyze seismic response of the concrete gravity dam, subspace iterative method was applied to compute free vibration period of the dam, time integration method was builtup for the seismic time history analysis and formulation of coupled vibration of reservoir water and dam were also deduced.

其次，针对混凝土重力坝的地震响应分析问题，采用子空间迭代法计算了大坝的自振周期，建立了地震时程分析的逐步积分方法，并且推导了库水和坝体耦合振动的理论公式。

Based upon the Blok flash temperature criterion and the experiments,the formula of bulk temperature is revised for considering the effects of different lubricating way,oil quantity and cutter's press angle on the bulk temperature,and a new convenient integra...

文中以 BLOK 闪温准则为基础，通过试验对本体温度经验式提出了修改，以考虑不同润滑方式、供油量及刀具压力角对本体温度的影响，并在优化选参曲线的基础上，提出了新的简便的积分温度计算公式。

This paper adopts the trapezoidal asympotic formula, and provides a novel formulation deduced for the functions, which takes the influence of the singularities into account, like Romberg method.

通过推导该类函数积分的梯形公式的渐进估计式，得到了考虑奇点影响的外推算法－类Romberg算法。

The Romberg formula is a successful example of peecise solution,wish is worked out from linear combination few approximate solutins.

Romberg求积公式以精度高而著称，而且也是用几个粗造的近似值的线性组合得到较为精确值的成功典范，因而在数值积分中广为运用。

This paper analyzes the compound attractor structure of a new three-dimensional autonomous chaotic system.

分析了一种新的三维自治混沌系统吸引子的复合结构。

ON shut rivals out of their transmission systems and shy away from reinvesting their profits in network improvements.

ON将竞争者挡在了其输送体系之后，并不愿将其收益再投资于网络改建工作。