1) Fourier fitting
富氏拟合
2) Fourier transform
富氏变换
1.
There are problems in two aspects of the Parker fast Fourier transform for inversion of unitary density interface: the first is rather difficult to solve gravity anomaly on target interface;while the second is limitation from forward problem solving rate and inversion parameter dimensionality,the interface cannot be divided precisely.
Parker快速富氏变换反演单一密度界面存在两方面问题:一是求解目标界面重力异常难度较大;二是受正演速度及反演参量维数的限制,不能对界面进行精细划分。
2.
The development of time-frequency analysis has three periods: Fourier transform, short-time Fourier transform, and wavelet transform.
时频分析方法经历了富氏变换、短时富利叶变换、小波变换三个阶段。
3.
There are problems in two aspects of the Parker fast Fourier transform for inversion of unitary density interface:thefirst is rather difficult to solve gravity anomaly on target interface;while the second is limitation from forward problem solvingrate and inversion parameter dimensionality,the interface cannot be divided precisely.
Parker 快速富氏变换反演单一密度界面存在两方面问题:一是求解目标界面重力异常难度较大;二是受正演速度及反演参量维数的限制,不能对界面进行精细划分。
3) wustite
富氏体
1.
Due to the action of diffusion in reaction process and the reducing of wustite,so the sinter has a better reactivity and better strength than self-fluxed sinter,and thus, it is one of the main measurs for improving raw material metallurgical property and increasing cast iron quatity redused coke ratio.
由于扩散在还原过程中的作用、富氏体的还原 ,使得这种烧结矿的还原性和强度明显优于自熔性烧结矿 ,因而提高碱度是改善原料冶金性能和降焦增铁的主要措施。
4) Fullerene
富氏烯
1.
The new molecular forms of carbon, C60, C70 and other cage-shaped carbon molecules, have many names in English, such as Fullerene, Bucky-ball, all-carbon molecule et al and also in Chinese names.
C_(60)、C_ (70)及其它笼状碳分子命名尚未统一,如富氏烯、巴基球、全碳分子等等,为了统一译名,笔者建议采用“全碳分子”一词。
5) fourier filter
富氏滤波
6) Fourier series
富氏级数
1.
In the method, the deformation of the pile is expressed as the Fourier Series which with the additional terms.
把竖直桩作为弹性杆，用带附加项的富氏级数作为挠曲试函数，提出了多层地基中横向承载桩的一种分析方法。
参考词条
补充资料：非线性最小二乘拟合
分子式：
CAS号：
性质：用最小二乘法拟合非线性方程。有些变量之间的非线性模型，通过变量变换可以化为线性模型，此称为外在线性。而有些变量之间的非线性模型，通过变量变换不能化为线性模型，通称为内在非线性。对于非线性模型y=f(ξ,θ)+ε，其残差平方和。S(θ)是θ的函数，当模型关于θ是非线性的，正规方程关于θ也是非线性的。基于使残差平方和s(θ)达到极小的原理求出θ的估计值，拟合非线性回归方程。
CAS号：
性质：用最小二乘法拟合非线性方程。有些变量之间的非线性模型，通过变量变换可以化为线性模型，此称为外在线性。而有些变量之间的非线性模型，通过变量变换不能化为线性模型，通称为内在非线性。对于非线性模型y=f(ξ,θ)+ε，其残差平方和。S(θ)是θ的函数，当模型关于θ是非线性的，正规方程关于θ也是非线性的。基于使残差平方和s(θ)达到极小的原理求出θ的估计值，拟合非线性回归方程。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。