Description: 本程序是有关数学中常用的插值和拟合的问题，其中包括拉格朗日整体，拉格朗日局部，二点三次插值，可调点数插值，复杂多项插值，
一次曲线拟合，二次曲线拟合，三次曲线拟合，四次曲线拟合，五次曲线拟合。-this procedure is commonly used mathematical interpolation and fitting problems, including Lagrange overall, Local Lagrange, 2.3 times interpolation, adjustable interpolation points, a number of complex interpolation, a curve fitting, quadratic curve fitting, Curve Fitting three or four curve fitting, five curve fitting. Platform: |
Size: 126958 |
Author:冯鹏 |
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Description: 本程序是有关数学中常用的插值和拟合的问题，其中包括拉格朗日整体，拉格朗日局部，二点三次插值，可调点数插值，复杂多项插值，
一次曲线拟合，二次曲线拟合，三次曲线拟合，四次曲线拟合，五次曲线拟合。-this procedure is commonly used mathematical interpolation and fitting problems, including Lagrange overall, Local Lagrange, 2.3 times interpolation, adjustable interpolation points, a number of complex interpolation, a curve fitting, quadratic curve fitting, Curve Fitting three or four curve fitting, five curve fitting. Platform: |
Size: 126976 |
Author:冯鹏 |
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Description: 1stOpt是一套数学优化分析综合工具软件包。在非线性回归，曲线拟合，非线性复杂模型参数估算求解，线性/非线性规划等领域傲视群雄，首屈一指，居世界领先地位。除去简单易用的界面，其计算核心是基于七维高科有限公司科研人员十数年的革命性研究成果【通用全局优化算法】(Universal Global Optimization - UGO)，该算法之最大特点是克服了当今世界上在优化计算领域中使用迭代法必须给出合适初始值的难题，即用户勿需给出参数初始值，而由1stOpt随机给出，通过其独特的全局优化算法，最终找出最优解。以非线性回归为例，目前世界上在该领域最有名的软件工具包诸如Matlab, OriginPro, SAS, SPSS, DataFit, GraphPad等，均需用户提供适当的参数初始值以便计算能够收敛并找到最优解。如果设定的参数初始值不当则计算难以收敛，其结果是无法求得正确结果。而在实际应用当中，对大多数用户来说，给出(猜出)恰当的初始值是件相当困难的事，特别是在参数量较多的情况下，更无异于是场噩梦。而1stOpt凭借其超强的寻优，容错能力，在大多数情况下（大于90 )，从任一随机初始值开始，都能求得正确结果。-1stOpt is a set of mathematical optimization analysis and comprehensive tools package. In the non-linear regression, curve fitting, non-linear parameter estimation to solve complex models, linear/nonlinear programming areas such as boast of the pack, second to none, the world leader. Remove easy to use interface, the core of its calculation is based on the seven-dimensional High-tech Co., Ltd. researchers more than a decade of revolutionary research】 【general global optimization algorithm (Universal Global Optimization- UGO), the most important feature of the algorithm is to overcome today s computing world, in optimizing the use of iterative method must be given an appropriate initial value problem, meaning that users are given parameters Needless to initial value, but by 1stOpt randomly given, through its unique global optimization algorithm, the end to find out the optimal solution. In order to non-linear regression, for example, currently the world s most famous in the field of Platform: |
Size: 906240 |
Author:Rongsheng |
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Description: 摘 要： 介绍BP算法神经网络由线拟舍方法，并借助MATLAB工具箱函数将它运用于方解石色散特性研
究，通过拟合效果图，误差曲线，误差范数反映BP神经网络的优越性，体现BP算法较高的预测能力和良好的泛化能
力，并且可以自动地确定数学模型．精确度高，原理也较简单，尤其对复杂的输入输出系统具有更好的效果。-Abstract： Curve fitting method of BP neural network was introduced and applied in the model of the dispersion of calcite
crystals by MATLAB tools．The results show that BP algorithm has high forecasting capacity and good generalization capacity
in three areas：the map of curve fitting，the deviation curve and the error norm．BP neural network can automatically identify
mathematical model，which has higher precision，and its principle is relatively simple．So it is a very good tool for complex
input-output system． Platform: |
Size: 293888 |
Author:zhenzhen |
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Description: 数值分析报告，包括追赶法求解三对角方程、迭代法求非线性方程、曲线拟合、区间逐次分半的复化梯形公式计算积分，题目、代码及运行结果。-Numerical analysis report, including catch-up method for solving tridiagonal equation, iterative method for the nonlinear equations, curve fitting, half of the complex range of successive trapezoidal integration formula, subject code and the results. Platform: |
Size: 396288 |
Author:yutao |
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Description: 最小二乘是由方程式近似的数据点的一组的方式，让你预测中间值，或计算的数据的一些措施。您可能已经通过绘制通过数目的数据点图上绘制的直线近似的趋势线。最小二乘这不只是“装修”，但在数学的方式，最大限度地减少错误，从而导致。我的单元延伸最小二乘从仅仅是一种直线拟合到高阶多项式为更复杂的数据（其中可能有一平方律拟合的物理原因，例如），或更好的匹配的数据。-Least-squares is a way of approximating a set of data points by an equation, allowing you to predict intermediate values or calculate some measure of the data. You may have approximated a trend-line by drawing a straight line through a number of data points plotted on a graph. Least-squares does just this "fitting" but in a mathematical way that minimises the errors that result. My unit extends least-squares from just a straight-line fit into higher order polynomials for more complex data (where there may be a physical reason for a square-law fit, for example) or for a better match to the data. Platform: |
Size: 222208 |
Author:liu |
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Description: 高速铁路路基沉降是一个复杂的系统过程,涉及不同时期、不同工况,选用单一的预测模型不足以反映路基整体的变形规律.Logistic模型及Verhulst模型的曲线均为S形,可以反映全过程的地基沉降与时间的关系.针对路基填筑期和降水期两个时段利用MATLAB软件编制程序计算模型参数,得到Logistic模型和灰色Verhulst模型,进而求得两者的最优加权组合模型.对比结果表明:在路基填筑期由两者的最优加权组合模型预测得到的结果与实测结果较吻合,拟合精度高于单一模型 而在降水期Verhulst模型的预测值更接近实测值,平均相对误差约为1.75％,拟合精度较高.-High-speed railway subgrade settlement process is a complex system involving different times and in different conditions, the choice of a single forecasting model does not adequately reflect the overall deformation of roadbed. Curve Logistic model and Verhulst models are S-shaped, the whole process can be reflected foundation settlement versus time. against roadbed construction period of two hours and precipitation using MATLAB software programming model parameters, the Logistic model and gray Verhulst model, and then get the optimal model of a weighted combination of the two. comparative results indicate : results and experimental results in the roadbed construction period by the weighted combination of the best of both models predicted than the anastomosis fitting accuracy than a single model precipitation predicted value of Verhulst model closer to the actual value of the average relative error approximately 1.75 fitting accuracy. Platform: |
Size: 1112064 |
Author:王斌 |
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Description: CCMATH 是数据计算库, 源码C, 包含几何学，曲线拟合，及其它-CCMATH is a mathematics library, coded in C, that contains functions for linear algebra, numerical integration, geometry and trigonometry, curve fitting, roots and optimization, Fourier analysis, simulation generation, statistics, special functions, sorts and searches, time series models, complex arithmetic, and high precision computations Platform: |
Size: 258048 |
Author:Liu |
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Description: 主要讲述如何用MATLAB进行程序设计及解决实际问题，具体内容包括MATLAB程序设计概念、选择、循环、字符串操作、单元阵列与结构、高级文件输人/输出及高级函数等;针对实际应用，具体内容包括用MATLAB绘图、解线性代数方程组、进行基本统计、集合、排序和索引、处理声音和图像,以及高等数学中的曲线拟合，复数计算、微积分等(It mainly describes how to use MATLAB to program and solve practical problems. The specific content includes MATLAB programming concepts, selection, loops, string operations, cell arrays and structures, advanced file input / output, and advanced functions. For practical applications, specific Content includes drawing with MATLAB, solving linear algebraic equations, performing basic statistics, set, sorting and indexing, processing sounds and images, and curve fitting in advanced mathematics, complex number calculation, calculus, etc.) Platform: |
Size: 64512 |
Author:瓜地考拉 |
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