-
KFFT
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.)
- 2013-12-18 22:32:50下载
- 积分:1
-
Dsimplex
说明: Dsimplex.m 对偶单纯形法求解线性规划问题(Dual simplex method for solving linear programming problems)
- 2019-03-28 10:59:52下载
- 积分:1
-
yxyffbc(dsb)
有限元方法fortran编程,包括二维三维线性非线性静态分析、稳定流瞬时流分析、振动问题、特征值问题、并行计算等。包含了所有子程序。(Finite element method fortran programming, including 2D and 3D linear and nonlinear static analysis, steady flow transient flow analysis, vibration problems, eigenvalue problems, parallel computing. Contains all subroutines.)
- 2013-11-24 23:02:01下载
- 积分:1
-
kelinsi
MAYLAB语言编写柯林斯公式的S-FFT及D-FFT计算程序,请读者自行根据需要修改(MAYLAB language Collins formula S-FFT and D-FFT calculation program, the reader according to their needs modification)
- 2021-04-22 21:48:48下载
- 积分:1
-
RLS
RLS algorithm.design by simulink
- 2011-07-27 22:19:05下载
- 积分:1
-
fft2d
fft的文件,fortran环境下运行!欢迎指正!(fft documents, fortran environment running! Please correct me!)
- 2021-05-08 18:18:35下载
- 积分:1
-
fortran_nr
用fortran写的牛拉潮流计算程序,实验中的结果,比较简单,仅供参考(fortran write with ox-drawn flow calculation procedure, the results of experiments, relatively simple, for information purposes only)
- 2006-12-23 23:15:37下载
- 积分:1
-
semi-analytical-numerical-method
一本介绍半解析数值方法的经典之作,对从事数值分析及方法研究和应用的科研人员是不错的参考资料(Introduce a semi-analytical numerical method of classic, engaged in numerical analysis and methods of research and application of scientific research personnel is a good reference)
- 2009-02-06 16:59:06下载
- 积分:1
-
ansys二次开发
说明: ansys二次开发 开发语言主要基于UIDL和APDL开发方法 来源网络(ansys secondary development source. UIDL and APDL develapment langrage.)
- 2020-06-23 13:20:02下载
- 积分:1
-
high-resolution-one-dimension
高分辨率要求系统具有大的带宽,瞬时带宽的增加必将提高系统对硬件的要求,本文采用方便灵活的步进频率波形信号。脉间频率步进波形通过子脉冲载频的步进变化来获得大的有效带宽,使成像具有高分辨率,采用加窗和补零方法提高信噪比,但该信号对目标径向速度非常敏感。采用补零方法提高距离取样分辨率,使距离像细化,并用公式说明了补零只能提高距离取样分辨率,并不能改变频率步进信号的距离分辨能力。该信号波形对目标径向速度的敏感,使目标能量分散到邻近的距离单元造成距离分辨率下降,如果不事先进行速度补偿,直接对回波信号进行逆傅立叶变换,将使所成一维距离像发生频谱展宽,并伴有距离像发生平移。本文证明了当目标有径向速度时仍采用对回波信号直接进行逆傅立叶变换的方法将使一维距离像发生频谱展宽并伴有距离像发生频移,从而严重影响了一维距离像的质量。(high-resolution requirements of the system with large bandwidth, the increased instantaneous bandwidth will improve the system of hardware, In this paper, a flexible and convenient step frequency signals. Pulse frequency step-pulse waveform through the carrier frequency step to achieve great changes in the effective bandwidth. make imaging with high resolution, increasing the window and fill methods to improve signal-to-noise ratio is, However, the signal on the target radial velocity is very sensitive. Using zero-distance sampling method to improve resolution, so that distance as refinement, and formulates a zero-distance sampling can improve resolution, does not alter the frequency of the signal from stepping resolution capabilities. The signal waveform on the target radial velocity sens)
- 2007-04-07 22:15:33下载
- 积分:1