Fast Fourier transforms analysis
Parallel algorithm based on Fast Fourier transforms
... of Fourier transform is about one hundred years, we know that the frequency-domain analysis is often better than the time-domain ...a fast and effective algorithm to reduce calculation times of ...
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Numerical stability of nonequispaced fast Fourier transforms
... nonequispaced Fourier matrix is ...error analysis for the d-variate ...nonequispaced Fourier matrix. As usual in a worst case analysis, the errors are overestimated, especially for dimensions ...
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GridWeaver: A Fully-Automatic System for Microarray Image Analysis Using Fast Fourier Transforms
... Results: This paper presents GridWeaver, a program that reads in images from a microarray experiment, automatically locates subgrids and spots in the images, and then determines the spot intensities needed in the ...
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EEG signal of epiliptic patient by fast Fourier and wavelet transforms
... signals. The advantage of this wavelet system is it can represent the spiky form of the EEG signals properly. In this Daubechies system, the different orders of the wavelets that are normally used are 2,3,4,5, and 6. ...
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Comparisons of the execution times and memory requirements for high-speed discrete fourier transforms and fast fourier transforms, for the measurement of AC power harmonics
... 31 6,2 kHz 157 128 6,4 kHz 40 8 kHz 202 256 12,8 kHz Fig. 10 shows the resulting execution times, which are also broken down for the FFT algorithm to show the times required for the actual FFT operation, and the ...
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Approximate fast graph Fourier transforms via multi-layer sparse approximations
... Finally, a theoretical analysis of the proposed greedy di- agonalization would be of great interest. For example, a result linking a graph structure and the minimum number of Givens rotations required to ...
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High Speed Area Efficient Radix-3 and Radix-4 Fast Fourier Transforms
... A fast Fourier transform (FFT) is any fast algorithm for computing the ...(DIT) fast Fourier transform (FFT) very often has advantage over the decimation-in-frequency (DIF) FFT for most ...
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Fast-responding measurements of power system harmonics using discrete and fast fourier transforms with low spectral leakage
... polar analysis, but apart from that, the entire algorithm must be executed at the sample time T s ...the Fourier Transform has to be calculated each time a new ADC sample ...
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FOURIER TRANSFORMS, OPTION PRICING AND CONTROLS
... introduce Fourier transform (in the log-forward space) methods in ...the Fourier-Laplace transform in the log-strike space, and they showed how to calculate the Fourier integral using fast ...
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Determination of Anti Colon Cancer Drug, Irinotecan by Fast Fourier Transforms Continuous Cyclic Voltammetry
... When the electrode-solution interface is exposed to irinotecan, which can adsorbed on the electrode, the oxide formation process becomes strongly inhibited. In fact, the inhibition of the surface process causes ...
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Fast Fourier Transforms over Prime Fields of Large Characteristic and their Implementation on Graphics Processing Units
... Analysis of functions for transposed data. For functions that compute the trans- posed input vector, we expect memory instruction overheads to be minimized. Moreover, we expect each thread to issue more arithmetic ...
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High Speed Area Efficient Radix-2 Fast Fourier transforms using Signed and Complex Number
... A fast Fourier transform (FFT) is any fast algorithm for computing the ...(DIT) fast Fourier transform (FFT) very often has advantage over the decimation-in-frequency (DIF) FFT for most ...
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Bagged Decision Trees Based Scheme of Microgrid Protection Using Windowed Fast Fourier and Wavelet Transforms
... Abstract: Microgrids of varying size and applications are regarded as a key feature of modernizing the power system. The protection of those systems, however, has become a major challenge and a popular research topic for ...
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Fractal Fourier Transforms Based Image Authentication
... Abstract— Fourier transform is an important role in major image processing issues used to represent an image in a frequency ...The fast evolution of digital images exchanges motivates to growing demand of ...
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Fast Fourier Transforms
... 11.8 Concluding Remarks It is unlikely that many readers of this chapter will ever have to implement their own fast Fourier transform software, except as a learning exercise. The computation of the DFT, ...
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Fast fourier transforms and the Fujitsu VPP300
... 2.8 The Reduced Transform Algorithms. 2.10 Bluestein 's Algorithm in Multiple Dimensions. 2.11 Data Movement in the Multidimensional FFf. 2.12 Square Transpose Multidimensional[r] ...
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Accelerating Fast Fourier Transforms Using Hadoop and CUDA
... From these tests, we can deduce that reading and writing constitutes a large percentage of computation time for FFTs on large files, and though using a GPU is helpful, it [r] ...
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Fast Fourier transforms on energy-efficient application-specific processors
... 5. CONCLUSIONS In this Thesis, several methods for increasing the energy-efficiency of fast Fourier computations on application-specific processor platform based on transport triggered architecture are ...
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Fourier and Laplace Transforms
... Laplace transforms are examples of mathematical operations which can play an important role in the analysis of mathematical models for problems orig- inating from a broad spectrum of ...These ...
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Fourier transforms and convolution
... • In two-dimensional convolution, we replace each value in a two-dimensional array with a weighted average of the values surrounding it in two. dimensions[r] ...
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