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numerical

于 2014-01-06 发布文件大小:10KB

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求解二阶变系数常微分方程,主要用于涡激振动中频率响应的计算(Solving second-order ordinary differential equations with variable coefficients)

文件列表：

numerical
.........\freespan.m,295,2011-01-08
.........\martix.m,2437,2011-01-08
.........\martrix_ylq.m,3037,2011-01-08
.........\numerical section.m,2722,2011-01-07
.........\RESULT-undefined value of l0.m,16364,2011-01-07
.........\result2.m,1552,2011-01-08
.........\sollll.m,189,2011-01-08
.........\Untitled4.m,19111,2011-01-15

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计算离散傅里叶变换的一种快速算法，简称FFT。快速傅里叶变换是1965年由J.W.库利和T.W.图基提出的。采用这种算法能使计算机计算离散傅里叶变换所需要的乘法次数大为减少，特别是被变换的抽样点数N越多，FFT算法计算量的节省就越显著。(A computing discrete Fourier transform fast algorithm, referred to as FFT. Fast Fourier Transform in 1965 by the JW Cooley and TW Tuji Ti out. Using this algorithm enables a computer to calculate the number of multiplications needed for the discrete Fourier transform greatly reduced, especially sampling points N is transformed more and save FFT algorithm to calculate the amount of the more remarkable.)

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(一) 模拟产生一个正态随机序列X(n)，要求自相关函数满足画出产生的随机序列波形。 ((A) simulation to generate a normal random sequence X (n), required to meet the autocorrelation function of random sequences generated by the waveform plot.)

2011-05-07 11:27:33下载

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numerical

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