FT2D

地理坐标系转地磁坐标系，输出磁地方时等参量(Geographic coordinates turn geomagnetic coordinate system, the output magnetic local time and other parameters)

matlab 线性编程方法描述，英文版，实用性很高，适合工程人员使用(matlab linear programming method described in English, highly practical for engineers to use)

包含三种跳频序列编码的实现，实现了性能改进，很经典的。(contains three hopping sequence coding to achieve and realize the performance improvements, very classic.)

说明：  一楼房的后面是一个很大的花园. 在花园中紧靠着楼房有一个温室,温室伸入花园2m,高3m,温室正上方是楼房的窗台. 清洁工打扫窗台周围,他得用梯子越过温室,一头放在花园中,一头靠在楼房的墙上. 因为温室是不能承受梯子压力的,所以梯子太短是不行的. 现清洁工只有一架7m长的梯子, 你认为它能达到要求吗? 能满足要求的梯子的最小长度为多少?(The back of a building is a big garden. In the garden close to a building in a greenhouse, greenhouse into the garden 2m, high-3m, the greenhouse is the top of the building' s bay windows. Cleaners cleaning around the windowsill, he crossed to use a ladder greenhouse, on a garden, against a building wall. because of the greenhouse can not bear the pressure of a ladder, so the ladder is not too short. cleaners are only a 7m long ladder, do you think it can meet the requirement it? ladder to meet the requirements of the minimum length of the number?)

code for converting colored image to gray

matlab gui 自动滤波 iir和fir(matlab gui automatically filter)

说明：  一个计算拉个朗日插值很好的程序，绝对正确无误。(A calculation of long pull on a good interpolation procedure, is absolutely correct.)

matlab常用函数参考手册，各类函数分类清晰明了，使用方便。(matlab reference manual for common functions, various types of function classification clarity, easy to use.)

基于matlab的锁相放大例程，稍加修改，即可实现功能(Matlab based on the lock-in amplifier routines, slightly modified, you can achieve the function)

控制系统的分析包括系统的稳定性分析、时域分析、频域分析及根轨迹分析。 该资料是应用MATLAB控制系统工具箱和SIMULINK辅助环境，对控制系统进行分析。(Stability analysis of control systems include systems analysis, time domain analysis, frequency domain analysis and root locus analysis. The data is the application of MATLAB Control System Toolbox and SIMULINK assisted environment, control system analysis.)