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1)  fitting plane linear in old highway
旧路平面线形拟合
1.
Based on the discussion about fitting normal error s definition,constitution and properties,it was suggested that fitting normal error represented the error of fitting plane linear in old highway.
在论述拟合法线偏差定义、构成及性质的基础上,提出以拟合法线偏差表征旧路平面线形拟合偏差;建立了基于法线偏差的旧路平面线形拟合精度指标;提出了采用步长压缩摆动趋近法计算拟合法线偏差的算法,并就拟合法线偏差的符号判定准则及方法进行了讨论。
2)  horizontal alignment fitting
平面线形拟合
3)  highway alignment
公路平面线形
1.
Discussion of a curve design method of highway alignment;
一种公路平面线形曲线型设计方法的探讨
2.
Combined with practical engineering evaluation on highway alignment,a kind of method is put forward to fit highway alignment on the basis of the cubic spline function.
结合某高速公路实施道路安全评价即线形质量评价,提出基于三次样条函数拟合公路平面线形的基本原理,讨论了拟合曲线参数与曲线特征点识别方法及外业采样点分布的精度要求。
4)  plane fitting
平面拟合
1.
In this approach,the actual illumination distribution was estimated using plane fitting,and then the restoration of the image was performed according to the invariance of the pixel reflective coefficient.
该方法基于平面拟合来估算出实际的光照强度分布,并根据图像各点的反射系数不变这一特性来对图像进行修正。
2.
The results of planar parameters estimation are not accurate by traditional plane fitting methods to point clouds,because the gross error and outliers are not considered.
针对常用的平面拟合方法在点云数据存在粗差或异常值扰动时,存在拟合结果不稳定的缺点,提出了一种稳健的点云数据平面拟合方法。
3.
This paper discribes the study on the rings prediction in construction of long-distance tunnel shield,a rings prediction model based on coordinate transformation and plane fitting is established,and a computer analysis system is then established for the model as well.
以隧道盾构中通用楔形管片的选型为研究对象,推导了基于坐标转换和平面拟合的管片选型数学模型以及轴线偏差量的计算公式。
5)  fitting plane
拟合平面
1.
In the light of the question of some data-fitting plane, this paper builds mathematical model.
为使数据点与拟合平面的最大偏差达到最小,提出 一种求最佳平面的新方法,并给出严格的理论证明。
6)  surface errors fitting
面形拟合
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。

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