trapezoidal rule

Areas under curve over the period of 0 to 12 hours ( AUC0-12 ) were calculated by using linear trapezoidal rule and multiple linear regression models was established by stepwise regression method .

线性梯形法计算0～12h药时曲线下面积（AUC0-12），逐步回归法建立多元回归模型，并与文献报道进行比较。

In modelling a nonuniformly sampled with few and scattered input and output data , the method of the rectangle or the trapezoidal rule for numerical integration would lead to a considerable error .

在非均匀采样系统建模过程中，由于数据稀疏，样本小、用通常的矩形或梯形法进行数值积分，将会引起较大的误差。

On methods of trapezoidal rule with local extrapolation

点估计的局部矩方法关于梯形法的局部外插

The trapezoidal rule is adopted for the quadrature of the memory term and the quadrature error is estimated .

对于记忆项的数值积分，采用了梯形公式与矩形公式结合的方法，并估计了数值积分的影响。

A practical , reliable and precise simulation program of automation control system ( SPACS ) is designed based on Trapezoidal Rule , which can connect to other simulation program freely .

针对自动控制系统研制了一个切实可靠、计算精确、运行快速、方便与其它仿真程序对接的自动控制系统通用仿真程序，起名为SPACS。

This paper presents an optimum numerical algorithm of compound trapezoidal rule of singular integrals over two dimensional rectangular domains with vertex singularities . A few examples are given .

本文对于顶点为奇点的二维矩形域上的瑕积分的近似计算给出了优化复化梯形数值算法，并通过几个计算实例证明优化复化梯形数值算法所得结果的相对误差是目前几种方法中最小的。

This paper describes an implicit integration alternating solution method for power system dynamic stability simulation . The method is based on the trapezoidal rule of implicit integration in solving differential equations , which is numerically stable .

本文介绍一种基于微分方程隐式积分梯形公式的电力系统稳定计算隐式积分交替求解算法。

By means of the minimum potential energy principle and a direct integration algorithm superior in both stability and accuracy for linear problems-the average acceleration method ( the trapezoidal rule ), the train / frog vertical vibration equations are established and solved .

应用最小势能原理导出了系统运动方程，并用无条件稳定、精度最佳的平均加速度方法直接积分求解。

Using the classical model and piece-wise linearization technique , this paper presents a novel method for fast numerical simulation and assessment of power system transient stability . The method adopts the implicit trapezoidal rule and the relaxation method instead of the direct but time-consuming matrix inversion .

在使用电力系统经典模型和分段线性化的基础上，本文利用隐式梯形积分规则并结合矩阵求逆运算的松驰方法，推导出一种电力系统暂态稳定性数值仿真及快速判断方法。