Love_xin

龙格库塔算法的加速算法（matlab),拟二步四阶算法(the accelerating of runge-kutta method by matlab)

feigenbaum第一常数，画出其分岔图。(feigenbaum first constant, draw the bifurcation diagram.)

周长面积法（小岛法）求分形维数，编译过，非常好(xiaodao)

读取SAC格式天然地震数据，可以先读取158字节道头，并且输出NPTS（数字字母码格式），然后开始读取地震数据(Read SAC natural seismic data format that can be read 158 bytes road head, and the output NPTS (alphanumeric format), and then start reading the seismic data)

matlab程序设计 入门，适合初学者，很快上手(matlab program design entry, suitable for beginners, learn quickly)

说明：  噪声中非平稳信号的频谱分析，基于MATLAB，实验报告一份(Nonstationary noise frequency spectrum analysis, based on MATLAB, a lab report)

matlab 自适应有限元方法，主要为二维椭圆型方程(Adaptive finite element method for two-dimensional elliptic equations)

二分搜索法 其中包含三个文件求其解析解太难 用二分法 快速搜索 并保证其一定的精度 (Binary search algorithm to find the optimal solution by dichotomy)

基于射线模型的浅海水声信道的仿真，采用解方程组算法得出本征路径数N，考虑多径和多普勒效应，并基于此加以自适应均衡技术进行均衡。(Ray simulation model of shallow water acoustic channel based on the use of solutions of equations or algorithms intrinsic number of paths N, consider multipath and Doppler effect, and based on this adaptive equalization techniques to be balanced.)

说明：  5. 在三条径的瑞利信道中，对于直接序列扩频： (1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，测量BPSK的误码率性能，画出比特信噪比与信道估计均方误差的关系曲线，画出比特信噪比与误码率的关系曲线，请解释在误码率为0.01时，两种合并方式所表现的不同的物理意义。 (2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真(自己编写代码S-Function方式)，分析所设计方案的时间同步精度，画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已经同步，请设计DS-CDMA一种具体的频率同步方法，用Simulink进行仿真(自己编写代码S-Function方式)，画出比特信噪比与频率同步误差的关系曲线。 (5 In the three path Rayleigh channel, for direct sequence spread spectrum: (1) Please design a specific DS-CDMA code division guide-assisted channel estimation, receiver, etc were used to benefit the merger, the maximum ratio combining. With the Simulink simulation, BPSK BER performance measure, draw-bit signal to noise ratio and channel estimation mean square error of the curve, draw the signal to noise ratio and bit error rate curve, please explain in bit error rate 0.01, the two methods are combined performance of the different physical meaning. (2) frequency has been set up synchronization, a specific design of DS-CDMA single-stop sliding correlation method of time synchronization, simulation with Simulink (S-Function code their own way), analyze the design of time synchronization accuracy, draw bit signal to noise ratio and capture probability curve. (3) set time has been synchronized, a specific design of DS-CDMA frequency synchronization method, simulation using Simulink ()