曲线拟合

Iteration method ; multi curve regression ; water diversion ; computer management system

迭代法；多曲线拟合；水量计算；计算机管理系统

In this paper, a new tracing algorithm is presented for planar curve reconstruction based on the regular distribution property of the point set.

根据实际采样中离散点分布相对集中的特点，给出了一个用简单曲线拟合平面上的无序点集的跟踪算法。

Methods At first, the relationship of linear or non-linear between dependent X and independent Y in original data can be distinguished by scatter diagram which can be made through Excel software.

方法通过利用Excel可绘制散点图的功能，了解原始数据自变量X和因变量Y间的线性与非线性关系，并由自变量X和因变量Y的自然对数转换后的散点图的情况，决定采用何种曲线拟合。

Methods At first, the relationship of linear or non-linear between dependent X and independent Y in original data can be distinguished by scatter diagram which can be made through Excel software. The scatter diagram of log- arithmic transformation between dependent X and / or independent Y decides which curve to be fitted.

通过利用Excel可绘制散点图的功能，了解原始数据自变量X和因变量Y间的线性与非线性关系，并由自变量X和因变量Y的自然对数转换后的散点图的情况，决定采用何种曲线拟合。

According to the results of the experiments on simulated data , PRGA gives better results in curve fitting compared with simple GA and traditional numerical iterative method .

实验证明，该方法对于曲线拟合问题能取得优于简单遗传算法和传统数值迭代方法的结果。

In order to calibrate wavelength with sine curve,three algorithms using different numbers of unknown parameters are proposed.

使用正弦曲线拟合进行波长校准时，根据不同的待定系数选择方法，提出三种校准算法。

Convergence algorithm of four～parameter sine wave curve～fit.

四参数正弦曲线拟合的一种收敛算法。

Sine wave parameters of law;Dielectric loss angle; FFT; Curve fitting; Digital measurement

中文关键词：正弦波参数法；介质损耗角； FFT；曲线拟合；数字化测量

This paper applies Fourier series to detach the fundamental waves phase, adopts the curve fitting to the frequency of the maximum spectrum amplitude, utilizes the sine wave parameters of law to the phase angle of this frequency, calculates δvalue and tanδvalue.

本文以傅立叶级数分离基波相位的方法为依据，通过曲线拟合求频谱幅值最大值处的频率，利用正弦波参数法求该频率处的相位角，从而计算出δ值和tanδ值。

Subpixel disparity is calculated by fitting a second-degree curve to the SSSD values. By intensity tracking of the image sequence and left right consistant check, wrong regions are removed in the disparity map and anisotropy diffusion filtering is introduced to smooth disparity map while preserving depth discontinuity.

采用曲线拟合的方法求解亚像素视差，通过左右一致性检验和图像序列的灰度跟踪，去除了视差图中的错误区域，并引入了各向异性扩散滤波对视差图进行保留深度突变的平滑处理。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。