Fourier transform造句
31. A point-diffraction interferometry was presented based on Fourier transform instead of the phase-shifting point-diffraction interferometry.
32. Study two of the most important basic operations in digital image processing: 2-D Discrete Fourier Transform and 2-D Discrete Convolution Transform. Map them on RCA.
33. An electric-field cross-correlation Fourier transform spectrometer worked in the region of millimeter waves is described.
34. Fourier Transform cannot offer entire information of signals, namely frequency information presenting to any period of time cannot be confirmed on earth.
35. Objective To identify Paeonia lactiflora Pall. and its confusable varieties by Fourier transform infrared(FTIR) spectroscopy assisted with OMNI sampler.
36. The kinetics of thiol-ene reaction is studied by Fourier Transform Infrared when benzoin dimethyl ether, benzoin ethyl ether, benzoin butyl ether, benzophenone and ITX were used as photosensitizer.
37. After analysing the character of Fourier transform, using 3 level symmetry of Fourier Kernel as a new algorithm for fast Fourier transform was proposed.
38. A blind short-time Fourier transform based approach for symbol timing in OFDM systems is proposed.
39. The reconstructed hologram is obtained by applying inverse Fourier transform to encrypted hologram.
40. With this method, the spectrum leakage can be avoided more effectively than Fast Fourier Transform algorithm and better accuracy can be assured in certain frequency range.
41. The power spectra curve as a function of the mode number of outer or inner profiles are also calculated by the application of fast Fourier transform to the circumferential profile data.
42. The Fourier transform realized by lensless Fourier hologram, and its application to 3-D measurement were studied. The experimental results were presented.
43. The method of impact excitation testing with Fast Fourier Transform (FFT) based on spectrum analyzer to determine the dynamic characteristics of a heald frame is introduced.
44. Combined with stoichiometric method, the diene value in cracking gasoline was determined by Fourier Transform Infrared Spectroscopy at selected wavenumber region.
45. Based on a simplified engine dynamic model, the cylinder pressure torque waveform can be achieved through Discrete Fourier Transform and Inverse Discrete Fourier Transform.
46. The radix-2 decimation-in-time algorithm based on 16-bit fixed-point operation and pipeline architecture are adopted in the core module IFFT(Inverse Fast Fourier Transform).
47. A shift sampling theory established by author (1997a) is a generalization of Fourier transform computation theory.
48. In this paper, three important speech processing techniques of the second class-short-time fourier transform, homomorphic filtering and linear prediction are briefly introduced.
49. By using Fourier transform to demodulate the modulated fringe pattern, two phase maps, which include out -of-plane and in-plane displacements, can be obtained.
50. The fractional Fourier transform of partially coherent flat-topped beams is also studied.
51. Fourier transform infrared spectroscopy (FT-IR) and Differential Scanning Calorimeter (DSC) were used on studying the thermolysis of 4,4'-diaminocarbamate-2,2'-diphenyipropane (DCB).
52. This paper studies the window parameter selection of short-time Fourier transform(STFT) with Gaussian window in detection of linear FM signals.
53. Fast Fourier Transform Algorithm is used to solve the wave equation and numerical calculation is made on the directional force seismic source. Its characteristics are also analysed.
54. In this paper we zoom some regions of FFT spectrum by the Fourier transform, get the precise value of some main frequency, and thus greatly improve the frequency discrimination of FFT spectrum.
55. The single rectangular pulse is a typical signal in Fourier transform, which plays an important role in signal spectrum theory.
56. Before the oxidation treatment, the residues were characterized by gas chromatography mass spectrum(GC-MS) and fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS).
57. The Fourier transform power spectrum of input object can be obtained when the input image is placed at the front or back of the hololens.
58. This paper presents computation of the signal's amplitude spectrum and phase spectrum the Fourier transform.
59. A new optical encryption technique based on double random phase computer-generated hologram of asymmetry fractional Fourier transform is presented.
60. The phase composition and the change of crystal lattice parameters were characterized by X-ray diffraction and Fourier transform infrared spectroscopy, respectively.
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