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FIR
FFT和FIR 快速傅里叶变换和FIR滤波器实验程序(Fast Fourier Transform FFT and FIR and FIR filter experimental procedure)
- 2009-12-15 16:20:02下载
- 积分：1
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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
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renyi-entropy
混沌时间序列分析的瑞利熵的计算方法，可计算出序列中的renyi entropy。(renyi entropy)
- 2021-04-13 09:58:57下载
- 积分：1
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cmpfit-1.2
很好的最小二乘求解工具，经典算法的c语言版本实现(A MINPACK-1 Least Squares Fitting Library in C)
- 2014-03-06 21:12:48下载
- 积分：1
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matlab常用算法程序集
说明： matlab常用算法程序集主要用于解决插值、函数逼近、矩阵特征值计算、数值微分、数值积分、方程求根、非线性方程组求解、解线性方程组的直接法、解线性方程组的迭代法、随机数生成、特殊函数计算、常微分方程的初值等问题(Mainly solve interpolation, function approximation, matrix eigenvalue calculation, numerical differentiation, numerical integration, equation roots, nonlinear equations solving, direct methods for solving linear equations, iterative methods for solving linear equations, random number generation, special functions Calculation, initial value of ordinary differential equations, etc.)
- 2020-07-28 20:58:13下载
- 积分：1
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sun_azimuth_data
根据经度纬度时间，计算太阳的方向角，matlab源码，附有详细的文档注释。(According to longitude latitude time, calculating the direction of the sun angle, matlab source, with detailed documentation of the Notes.)
- 2008-03-06 20:00:24下载
- 积分：1
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Usermat
说明： umat abaqus plasticity
- 2020-06-20 02:20:02下载
- 积分：1
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piece3Hermiteplot
这个程序是三次样条厄米特插值程序，可以用于拟合函数，做出图形(This program is a cubic spline Hermitian interpolation procedure can be used for the fitting function to make the graphics)
- 2012-07-30 23:42:21下载
- 积分：1
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FFTandIFFT
傅里叶变换FFT和逆傅里叶变换IFFT
欢迎大家喜欢(FFT and IFFT)
- 2009-03-24 20:05:19下载
- 积分：1
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pianxin
计算偏心圆导热计算以及同位网格上的SIMPLE算法
(Calculating thermal calculations and eccentric position on the grid with SIMPLE algorithm)
- 2013-07-02 21:26:11下载
- 积分：1
