power series expansions 幂级数展开式
taylor series expansions taylor级数的展开式解
formal power series expansions 形式幂级数展开
We obtain three approximate cubic strongly nonlinear oscillators respectively by Taylor series expansions method, approximate potential method and equivalent nonlinearization method.
分别用Taylor级数展开法、近似势能法、等效非线性化法得到三个近似的立方强非线性振动方程。
参考来源 - 非线性振动方程的渐近解及其数值验证·2,447,543篇论文数据，部分数据来源于NoteExpress
There are many gravity quantities expressed by finite spherical harmonic series expansions in the computing for geopotential.
重力场计算中，经常需要计算以有限阶球谐级数表示的重力场元。
For dealing with the electromagnetic fields near edges, an approximate scheme is developed using the series expansions and integral equations.
处理孔缝边界时，用级数展开和积分方程得到金属拐角处电磁场的近似解。
Then series expansions of multi-variable functions are applied to the derived approximations in terms of phase angles to generate the approximations in terms of group angles.
然后连续利用多元函数级数展开，导出群角表示的相速度和群速度近似公式。
应用推荐