梯形

Since RKPM is a kind of Galerkin meshfree methods, in this thesis, penaltyfunction method is employed to enforce the essential boundary conditions,trapezoidal rule is used for the approximation of displacement field function, Gaussand Hammer quadratures are applied for the numerical integration of systemequation,self-adapting method is applied for confirming the support of the pointinterpolated.

针对 RKPM 是一种伽辽金型的无网格方法，本论文采用罚函数法引入位移边界条件，用梯形积分法则近似位移场函数，对系统方程进行积分时分别使用了 Gauss 积分和 Hammer 积分，采用自适应的方法确定计算点的定义域。

The double decomposition polygon clipping method is brought forward based on polygon trapezoidal decomposition. By analyzing its time complexity, the case it applicable to and its accuracy, it is pointed out that the new clipping method has a lower complexity than the old methods and does not make mistakes in the case SutherLand-Hodgman algorithm would.

在多边形梯形剖分的基础上提出了双剖分多边形裁剪算法，并对算法的时间复杂度、适用范围和处理的正确程度进行分析，指出该算法的时间复杂度低于以往算法，在处理非自交叉的多边形时结果正确，不存在类似SutherLand-Hodgman等算法处理出错的问题。

Two hundred miles east of Ashkhabad, where the soil shelved intoridges of scrub-speckled sand, a harsh wind sprang up.

在阿什哈巴德以东200英里处，土地变成了长有稀松灌木的梯形沙地，狂风即时而起。

Two hundred miles east of Ashkhabad, where the soil shelved into ridges of scrub -speckled sand, a harsh wind sprang up .

在阿什哈巴德以东200英里处，土地变成了长有稀松灌木的梯形沙地，狂风即时而起。

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。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。