积分元

Analysis Rational functions and their decomposition, Computation of primitives: integral defined on a closed bounded interval, numerical methods.

分析 有理函数及其分解，基元计算：积分在已封闭的范围内区间，数值方法确定。

For the generalized boundary value problem a complete set of boundary integral equations and relevant numerical scheme are established.

利用 Hankel 变换导出了弹性地基上薄板弯曲问题的基本解，此基本解对三种常用地基模型具有统一的表达形式，针对近年提出的广义边值问题，建立了统一的边界积分方程和边界元求解格式。

Saint-Venant torsion ; curvilinear crack ; boundary integral equation ; boundary element ; stress intensity factor

Saint-Venant扭转；曲线裂纹；边界积分方程；边界元；应力强度因子

This article employs the method of element changing in definite integral to spread the dimension formula of plane figures .

利用定积分的换元法，推广了平面图形的面积公

Home card, the military card, the landscape Dinka if lost, damaged, please hold documents immediately to the customer service center, and pay cost of producing 10 yuan, Integral be retained by the original logging verified to be written off

家园卡，拥军卡，园丁卡若有遗失，损坏，请持证件立即到客户服务中心办理，并付工本费10元，积分予以保留，原卡号经核实后予以注销

Initial boundary value problem of two dimensional unsteady diffusion equations is solved in this paper. By using time-dependent fundamental solution of two dimensional diffusion equations and the extension of double layer potential, we establish virtual boundary integral expression of diffusion equations. Then virtual boundary element method is used to implement the numerical computation.

本文在求解二维非定常扩散方程的初边值问题时，利用二维扩散方程与时间有关的基本解，基于双层位势的延拓，建立二维扩散方程的虚边界积分表达式，然后利用虚边界元法进行数值计算。

In this paper, the boundary integration equations of contact problems are given according to the elastic-plastic and boundary elem...

本文根据弹塑性理论和边界元法理论推导出弹塑性接触问题的边界积分方程，给出多种接触问题研究方法、求解规则及相应的计算程序。

Some closedforms of formulae are also obtained for the evaluation of the Cauchy prin-cipal integrals over quadratic boundary elements and linear internal cells of2-D problems.

通过采用以上各种技术成功地解决了三维弹塑性有限形变问题边界元法中最关键的数值积分的精度和效率问题。

Use of the finite difference method for Volterra equation here as a variable element of the equation, As the same...

用差分方法求解沃尔泰拉方程，此处为一个变元的方程，由于该方程同时含有微分和积分，一般求解有一定的困难。

Methods In the first place,the mathematical model of the dynamical response of viscoelastic thin plates is established in physical space,then the fundamental equation in Laplace domain is obtained by using Laplace transformation.

首先在物理空间建立了粘弹性薄板动力响应问题的数学模型，然后利用拉普拉斯变换得到拉氏变换域的基本方程；利用基本方程的基本解，由边界元方法得到边界积分方程，并求得数值解；最后通过数值 Laplace 逆变换得到原问题的解。

No clear conclusions can be made about the predictie alidity of specific measures, they found, except for criteria for the underuse of drugs for cardioascular disease.

除了心血管病不合理用药标准外，对于特定评价方法的预测效度没有明确的结论。

The third and last is that almost all of them, being infinite in number, have been impostures, and by idle and crafty brains merely contrived and feigned after the event past.

第三、即最后一点是：几乎所有这些不胜枚举的预言都是欺人之谈，都是在事件过后由无聊而狡猾的脑筋推测与凭空捏造的。