The differential transform method is used to find numerical approximation of solution to a class of certain nonlinear differential algebraic equations. The method is based on Taylor's theorem. Coefficients of the Taylor series are determined by constructing a recurrence relation. To deal with nonlinearity of the problems, the Fa\`{a} di Bruno's formula containing the partial ordinary Bell polynomials is applied within the differential transform to avoid computation of symbolic derivatives. The error estimation results are presented too. Four concrete problems are studied to show efficiency and reliability of the method. The obtained results are compared to other methods.
翻译:本研究使用微分变换方法,通过基于泰勒定理构建递归关系,在非线性微分代数方程中解得数值近似解。通过Fa\`{a} di Bruno公式,运用部分普通Bell多项式来避免符号导数计算,以应对问题的非线性。此外,本文还给出了误差估计结果。研究四个具体问题以展示该方法的效率和可靠性。得到的结果与其他方法进行了比较。