RSquare

Signal modulation using Pam modulation (simulink)

说明：  正弦发生器，可以根据自己的需要改变参数，实现仿真(an example solution of sine wave generator)

Fx Debugger user guide

通过编程计算可得恢复后图像与原始图像的归一化均方误差为：(By programming available to restore the original image after the image and normalized mean square error:)

This is also related to shift keying mod technique.....it is also very helpfull for the biggner who want to do digital mod techniques.........

低通滤波器，每句程序都有注释，易懂，还有一个实例，便于加深认识(Low-pass filter, each sentence programs have notes, easy to understand, there is an instance, to facilitate a better understanding of)

射线追踪,包含了起点和终点的射线函数，对于地震传播研究具有重要意义！(Raytracing in a v(z) world. The toolbox contains functions forshooting fans of rays and functions for tracing rays with specific start and end points. General multi-bounce rays with any number of mode conversions can be traced. Automatic routines for P-P and P-S primaries in shot-gather geometry are provided for convenience. Any recording geometry can be used but most functions vectorize (e.g. are most efficient) for shot-gather geometry. Only traveltimes and rayparameters are detemined, not amplitudes. In these routines, the velocity models should be considered as "background" models. This means that the depths at which flections and mode conversions occur are dependent of the depths given as layer boundaries in the velocity models. Velocity models are specified by a vector of velocities and a same-size vector of depths. The j th velocity is in effect from the j th to the j+1 th depth. The bottom of the model is assumed at infinite depth. Thus v=5000 and z=0 specifies a cons)

说明：  This is code to simulation of AM, FM, PSK, QAM modulation

elasticsearch-river-mongodb 源码,主要讲述elasticsearch 和 mongodb 同步索引实现。可以实现自己编译。(Elasticsearch-river-mongodb source code, including elasticsearch and mongodb synchronization index. Can be compiled.)

模态振型分解法,讲的很详细，对于初学者很有用(Modal decomposition method, said very detailed, very useful for beginners)