transformation

2D Histrogram Two Dimention Histogram function

gives the initial and final velocities of a trajectory connecting R0 to Rf over a transfer time of dT. This method uses universal variables, from Vallado.

Spectrum Sensing Technique

基于matlab的程序学习举例，内包含多种应用程序，非常实用，适用于入门学习(Learning matlab-based program, for example, contains a variety of applications, very useful for entry-learning)

FD_TO_TEC is a MATLAB program which reads two files defining a finite difference model (FD format) and writes a TECPLOT ASCII file suitable for display by TECPLOT.

计算一个方柱的散射的波形，并求其RCS。方柱的网格总数是N=500个，时间步为1200步。网格尺寸为lamda/18,时间间隔是ddx/2*c，c为光速。脉冲源位于中心。方柱边长为7*lamda。并与相同尺度的球的散射场进行对比(Calculate the scattered waveform of a square column and find its RCS. The total number of grids of the square column is N=500 and the time step is 1200 steps. The grid size is lamda/18, the time interval is ddx/2*c, and c is the speed of light. The pulse source is at the center. The side of the square column is 7*lamda. And compare the scattering field of the ball of the same scale)

说明：  MATLAB实现图像的腐蚀膨胀,不是直接用语句的那种,而是根据腐蚀膨胀的算法编制的.(MATLAB Image corrosion expansion, not the kind of statement directly, but by the expansion of corrosion of the algorithm.)

说明：  介绍了线性调频信号的概念，线性调频信号的时频特性描述及用MATLAB进行仿真(the characters of Chirp signal)

粗糙集理论是一种基于对现实世界进行不确定描述的理论,属性约简是粗糙集理论的核心理论之一。对粗糙集理论进行阐述,并给出基于启发式的知识约简算法,最后结合MATLAB程序实例说明了该算法的可行性与有效性。(Rough set theory is based on the uncertainty of the real world is described in theory, attribute reduction is the core theory of rough set theory one. Elaborate on the rough set theory, and gives the knowledge-based heuristic reduction algorithm, and finally with MATLAB program example illustrates the feasibility and effectiveness of the algorithm.)

DahlUrsin, modeling amplitude versus offset