外文翻譯-基于matlab的數(shù)據(jù)曲線擬合分析(更新版)
【正文】 thod used to construct the curve as much as it reflects the observed data. Research and Application of a New Method of Curve technique of curve fitting is used proverbially for the image processing, reverse engineering, test data processing, etc. It is inequitable to process physical parameters by some usual methods of curve fitting. Those methods are performed only by minimizing the fitting error of one physical parameter, but do not take other parameters into account. The new method of curve fitting processes each physical parameter equally The simulation also proves that this new curve fitting method is right and effective. In the experiment of sound velocity, the voltammetry to measure the resistance experiment and the voltampere characteristic of diode experiment data processing as an example, introduced the experiment data processing based on the traditional experimental data processing methods, experimental data is processed by using MATLAB can effectively avoid the error caused by manual processing, but also can reduce the putational workload, obtain accurate curve fitting, thereby increasing the accuracy of data processing and fast,rom graphic display results also can be more intuitive to judge the validity of the experiment.Mathematical expression Given set of discrete data(xk,yk) (k=1,2,…,m),(1) Where xk is the independent variable x (scalar or vector, ., a monoor polyhydric variable) values??。曲線擬合技術在圖像處理、逆向工程以及測試數(shù)據(jù)的處理等領域中的應用越來越廣泛。量 (k=1,2,…，m) 稱為在xk處擬合的殘差或剩余，衡量擬合優(yōu)度的標準通常有 或 式中ωk0為權系數(shù)或權重（如無特別指定，一般取為平均權重，即wk(k=1,2,…,m),此時無需提到權）。若已知(1)的實際背景規(guī)律，即因變量y對自變量 x的依賴關系已有表達式形式確定的經(jīng)驗公式，則直接取相應的經(jīng)驗公式為擬合模型。（三）按最小二乘法原理求線性方程和方差分析（四）將直線化方程轉(zhuǎn)換為關于原變量X、Y的函數(shù)表達式
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