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延安大学数字信号处理课件Chapter 2 The Discreete-Time Fourier Transform (DTFT)
延安大学 数字信号处理 课件 Chapter 2 The Discreete-Time Fourier Transform (DTFT)
2018/3/15
延安大学数字信号处理课件Chapter 2 The Discreete-Time Fourier Transform (DTFT)。
Fourier-Transform, Integrated-Optic Spatial-Heterodyne Spectrometer with 1 GHz Resolution on a Silica-Based Planar Waveguide
Waveguides planar Spectroscopy Fourier transforms Integrated optics devices
2015/5/26
We present fabrication details and measurements of a high-resolution planar-waveguide spatial heterodyne spectrometer incorporating 64 asymmetric Mach-Zehnder interferometers.Measurements verify 1 GHz...
Research on new spectral reconstruction solutions for Fourier-transform spectrometer
imaging spectroscopy reconstruction spectrum Fourier transform Hilbert transform
2011/5/5
The spectral reconstruction of Fourier transform spectrometer can be simply achieved by using
a Fourier transform or a Fourier cosine transform. However, the traditional Fourier transform
solution i...
Novel Optical Fast Fourier Transform Scheme Enabling Real-Time OFDM Processing at 392 Gbit/s and Beyond
Optical communications Discrete optical signal processing
2015/6/10
An optical FFT scheme is implemented and tested at 392 Gbit/s. It enables OFDM sig-nal processing way beyond the bandwidth limits of electronics. The scheme operates with little energy as it exploits ...
An Adaptive Resolution Computationally Efficient Short-Time Fourier Transform
Adaptive Resolution Computationally Efficient Short-Time Fourier Transform
2009/9/4
The short-time Fourier transform (STFT) is a classical tool, used for characterizing the time varying signals. The limitation of the STFT is its fixed time-frequency resolution. Thus, an enhanced vers...
A Labview-Based Virtual Instrument for Engineering Education: A Numerical Fourier Transform Tool
Fourier transformation FFT DFT LabView simulation
2009/7/28
Engineering is based on practice. The minima of this practice should be given during the university education. This has become more and more comprehensive and expensive parallel to high-technology dev...
Characterization of Nitrogen Compounds in Vacuum Residues by Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
Vacuum residue Structural characterization Nitrogen compound
2009/7/24
The structural characteristics of the components of several vacuum residues from different geological sources (Taching, Sumatra light, Iranian heavy, Arabian mix, and Murban vacuum residues) were inv...
Rapid Quantitative Analysis of the Major Components in Soymilk Using Fourier-Transform Infrared Spectroscopy（FT-IR）
FT-IR ATR soymilk
2009/6/18
Fourier-transform infrared spectroscopy (FT-IR) on attenuated total reflectance (ATR) sampling was used for the quantitative analysis of the major components (protein, lipid, and sugar) in soymilk. Si...
Fourier-transform Spectroscopic Technique for Multi-spectral Nonlinear Microscopy Using a 5-fs Broadband Light Source
Four-wave mixing Nonlinear optical spectroscopy Fourier-transform spectroscopy
2009/6/2
We propose nonlinear Fourier-transform spectroscopy using a broadband pulse, which can discriminate the origin in Four-wave mixing (FWM) process. By taking account of the response function of a sample...
Transverse Shape Analysis of Xylem Ground Tissues by the Fourier Transform Image Analysis III.
Fourier transform image processing tracheid shape softwood characterization wood quality
2009/3/6
Tracheid arrangements and shapes on transverse sections were reconstructed by use of Fourier transform image analysis in five families, fifteen genera, and twenty-two species of softwoods. Each maxim...
Discrimination of Paper by Two-dimensional Fourier Transform
facial tissue paper Fourier transforms image analysis wire-mark forensic science
2009/3/6
Wire-marks of 13 different boxed facial tissue papers, from 3 manufacturers, with 5 different brand names, sold in 3 areas in Japan, were examined using a fast Fourier transform (FFT) image analysis ...
Analysis of Planar Anisotropy of Fibre Systems by Using 2D Fourier Transform
anisotropy fibre system Fourier transform rose of directions
2009/2/16
This paper describes a simple method of description of the anisotropy of fibre systems using image analysis. The proposed method is based on Fourier transform which is in frequency domains displayed b...
Preliminary Fourier-Transform Infrared Spectroscopy Analysis of Cotton Trash
Cotton Preliminary Fourier-Transform
2008/6/23
Ongoing research efforts at the United States Department of Agriculture (USDA) consist of developing methods for the identification of cotton trash. Botanical cotton trash (eg. leaf, stem, hull, bark)...
Examination of Full Fat and Reduced Fat Cheddar Cheese During Ripening by Fourier Transform Infrared Spectroscopy
Fourier transform infrared spectroscopy Cheddar cheese ripening
2008/3/28
The Fourier transform infrared spectra of reduced fat Cheddar cheese and full fat Cheddar cheese during ripening were examined. A suitable sampling procedure was used to obtain the spectra of cheese s...
Analysis of Modified Whole Casein with Different PhosphorusContents Using Phosphorus-31 Nuclear Magnetic Resonance and Fourier Transform Infrared Spectroscopy
casein nuclear magnetic resonance phosphorylation
2008/3/28
The different types of P in modified caseins and the role of P in casein interactions were studied using 31P nuclear magnetic resonance spectroscopy of whole casein with reduced or elevated P concentr...