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FFT
利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ,可以通过对x(n)做傅里叶变换,得到频谱图,找出幅度的最大值对应的频率值 ,进行多次变换,求出均方误差 。改变信噪比SNR,通过仿真可以得出随着信噪比增加,均方误差减小。(Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoidal signals, can be achieved by x (n) be the Fourier transform to get spectrum to identify the magnitude of the frequency value corresponding to the maximum , several transformations, find the mean square error. Change the signal to noise ratio SNR, the simulation can be drawn as the SNR increases, the mean square error decreases.)
- 2011-04-26 10:53:04下载
- 积分:1
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n-s-equation
一维的N_S方程的求解程序,是计算流体力学的算例(the N_S equation of one dimension .)
- 2012-04-09 15:32:13下载
- 积分:1
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back-forward-power-flow
对简单开式网前推回代法计算潮流方便,已通过编译,有运行结果(back forward power flow)
- 2013-09-26 10:12:32下载
- 积分:1
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de_test
差分进化算法,有测试函数,是遗传算法的改进算法,收敛快,精度高。(Differential evolution algorithm, a test function, is an improved genetic algorithm algorithm, fast convergence, high precision.)
- 2017-06-01 19:46:08下载
- 积分:1
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EnKF集合卡尔曼滤波代码
EnKF集合卡尔曼滤波代码,用于读写模式集合,包括两种扰动观测分析方案。(These files illustrate the model used for storing, reading and writing the
ensemble of model states.)
- 2018-05-02 10:58:56下载
- 积分:1
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luoxuanjiang
螺旋桨唱音信号建模,FFT变换后有明显的谐波(The propeller singing sound signal is modeled, and FFT transformation has obvious harmonic
)
- 2015-08-29 17:22:50下载
- 积分:1
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mul
实现有限域中乘法,输入二个普通二级制数,输出在本原多项式的乘法结果(Achieve limited multiplication field, enter the number of two-tier system of two ordinary output in primitive polynomial multiplication results)
- 2014-01-12 22:52:38下载
- 积分:1
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mtl_reg_sim_complinearized
多元非线性回归——岭回归方法,比常规的最小二乘更适合数据量较大的优化问题(Multiple nonlinear regression- ridge regression method is more suitable than the conventional least squares optimization problem of the large amount of data)
- 2020-09-19 00:47:52下载
- 积分:1
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phase-field
说明: 用相场法模拟晶粒的长大的一个程序,用c++编写的,(a program simulation the grain growth by Phase field written using c++)
- 2021-03-02 11:39:34下载
- 积分:1
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cubef
一个挺好用的源程序打包器,北京联高软件公司的,fortran代码转换成chm文档。(A useful tool for converting fortran source files to chm document.)
- 2011-09-26 19:26:13下载
- 积分:1