The dielectric property of dispersive media is written as rational polynomial function, the relation between D and E is derived in time domain. It is named shift operator FDTD (SO-FDTD) method.
将一类色散介质的介电常数写成有理分式函数形式，进而导出FDTD中电位移矢量D和电场强度E之间的关系，形成SO_FDTD方法。
Every polynomial is differentiable, and so is every rational.
每个多项式都是可微的，而每个有理函数也是如此。
This result can be combined with subdivision method to obtain a piecewise interval polynomial approximation for a rational surface.
这一结果可以与细分技术相结合，得到有理曲面的分片区间多项式的逼近。
Based on the polynomial blending function, a kind of blending function-blending function class and a new type blending function-rational one are deduced.
从多项式型混合函数出发，通过数学变换，构造了一类混合函数—混合函数类。
This surface is a piecewise bi-cubic rational parametric polynomial surface.
构造的曲面是分片双三次有理参数多项式曲面。
Enlighened by the superposed algorithm of two element polynomial interpolation, we present a simple method of finding rational interpolation functions.
受二元多项式插值的迭加算法的启发，给出一种简便的求有理插值函数的方法，同时通过实例进行验证。
Through the corresponding between integral coefficient polynomial and rational number, this paper obtains factorization from factorization of polynomial by the way of sieve in true fraction series.
本文利用整系数多项式与正有理数的对应，将多项式因式分解通过对真分数序列筛选的办法求得因式。
It is pointed out that the eigenvalues of these structures are the roots of a series of rational fraction polynomial equations. A theorem about the roots of these equations is proved in the paper.
本文指出了弱粘弹性材料结构的特征值是一组有理分式多项式方程的根，并给出了关于这些有理分式多项式方程根的一个定理。
The paper available mapping of integral coefficient polynomial and rational number, obtain factorization from factorization of polynomial by the way of sieve in true fraction series.
通过研究多项式的系数来确定整系数多项式的有理根，进而得出整系数多项式的有理根的一个判定定理和根的存在定理。
The paper available mapping of integral coefficient polynomial and rational number, obtain factorization from factorization of polynomial by the way of sieve in true fraction series.
通过研究多项式的系数来确定整系数多项式的有理根，进而得出整系数多项式的有理根的一个判定定理和根的存在定理。
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