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离散Fourier变换（简称DFT）为离散信号的分析从理论上提供了变换工具，但由于计算时间较长而难以实现，快速Fourier变换（简称FFT）则是一种减少计算时间的有效算法。本文在对DFT计算量进行分析的基础上指出了FFT的实现途径与计算方法，针对FFT算法进行了程序设计并给出了应用实例。-Discrete Fourier transform (referred to as DFT) analysis for discrete signal theory provides a transform tool, but due to a computational time and difficult to realize, fast Fourier transform (the FFT) is a reduction in the effective algorithm to calculate time. In this paper, DFT calculation was carried out on the basis of the analysis points out the ways and realize the FFT calculation of FFT algorithm for program design and application examples are given.

采样率小于一个连续时间信号最大频率的2倍时就叫undersampling，欠采样，根据抽样定理，当fs>=2fmax，也就是oversampling，过采样时，数字信号才能重建成原来的模拟信号，欠采样重建会发生混叠-Sampling rate of a continuous-time signal is less than the maximum frequency of 2 times is called undersampling, bandpass sampling, according to sampling theorem, when fs

ANSYS弹塑性分析教程.学习ANSYS辅助教程-Tutorial ANSYS elastic-plastic analysis. ANSYS-assisted learning tutorial

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您可以锁定您的文件夹使用的密码。使用的语言： C #Visual Studio 2012 +

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海康产品测试过支持的备份设备:一些测试过的备份设备的型号.rar-Haikang Products tested to support the backup device: Some of the backup device tested models. Rar

串联式混合动力辅助动力单元动态控制研究。值得参考-Series Hybrid power-assisted dynamic power control unit. It is also useful

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