raji2

说明：  With FR conjugate gradient method for solving unconstrained problem

The number π is a mathematical constant that is the ratio of a circle s circumference to its diameter and is approximately equal to 3.14159. It has been represented by the Greek letter "π" since the mid-18th century, though it is also sometimes romanized as "pi

该程序可实现巴特沃斯滤波器低通、高通、带通、带阻滤波器特性(The program can realize bart wo low-pass filter, qualcomm, bandpass filter, belt resistance properties )

Sector Beam Generation Program for computing Phase distribution function and Radiation pattern

说明：  MATLAB的一些入门基础简单程序，可以帮助初学者尽快进入状态(function)

利用Matlab内建的快速傅氏变换函数可以方便地在波数域计算重磁异常导数。介绍了基于Matlab语言的波数域求导的算法，给出了程序源代码，讨论了一些有助于提高计算精度的编程技巧。通过模型试验和数据分析， 发现在计算垂向导数时波数域求导算法的精度比傅氏级数的精度有明显改善；而水平导数的计算，2种方法的精度相当。在某区钾盐勘探中，用该方法处理高精度重力剖面数据，取得了较好效果。(It is convenient to calculate derivative in wave number space using the inbuih F胛function in Matlab．This paper describes a matlab algorithm for derivative calculation of 1 D gravity and magnetic anomaly in wave number space，gives code of program and deals with some programming skills for precision improvement．Throngh model test and data analysis，it is found that the precision of the F盯method is much higher than that of the Fourier Series method in vertical derivative calculation．In horizontal derivative calculation， however，the precisions of the two methods ale almost the same．During kainite exploration in a certain basin，satisfactory result Wag obtained in the processing of gravity profile data using this method．)

构造N次切比雪夫逼近多项式，实现多项式插值(Structure N times Chebyshev polynomial approximation)

牛頓優化算法，matlab代碼，已經驗證過可運行出正確結果(Newton optimization algorithm, matlab code has been verified to run the correct results)

matlab的一些波束形成的算法 多种方法。。(the matlab the beamforming algorithm a variety of methods. .)

什么数据库源码太复杂 搞不懂了码重复或已经存在(What database do not understand source code is too complex to repeat the code or already exists)