wigner distribution 中文意思是什麼

wigner distribution 解釋
維格納分佈
  • wigner : 威格納
  • distribution : n 1 分配，分發，配給；分配裝置[系統]；配給品；配給量；【經濟學】配給方法，配給過程；分紅；【法律...
  1. The fractional fourier transform is linear time - frequency transform, and it doesn ’ t have disadvantages of wigner - ville distribution. moreover, the precision of this method is higher, and the performance of antinoise is better

    而分數階傅立葉變換是線性時頻變換，所以它不受交叉項的干擾，沒有不模糊區間減半的缺點，而且它的估計精度高、抗噪性能好。
  2. Characterization of pressure signals in fluidized beds loaded with large particles using wigner distribution analysis : feasibility of diagnosis of agglomeration

    基於魏格納分佈的鼓泡流化床中結焦早期診斷
  3. Instantaneous frequency estimation of the surface myoelectric signal wigner - ville distribution based technique

    分佈的表面肌電信號瞬時頻率估計
  4. The reassigned smoothed pseudo wigner - ville distribution ( rspwvd ) is introduced, which has less interference and higher resolution than other time frequency distributions like wigner - ville, choi - williams etc. it is used to detect the multi - knocking of engine such as cylinder, piston pin, valve, crank bearing, connecting rod bearing and jib knocking. a new fault diagnosis technique based on the rspwvd for the engine multi - knocking problem is proposed. by comparing the bispectrum and bicoherence of the gear vibration signals, it is demonstrated that bispectrum has an advantage over bicoherence for feature extraction of such signals

    第四章首次引入一種重分配方法，得到干擾項少而解析度高的重分配平滑偽魏格納維爾分佈（ rspwvd ） ；對發動機曲軸主軸承響、連桿軸承響、活塞銷響、活塞敲缸響、氣門響和挺桿響等常見機械異響故障振動信號特徵進行了全面地比較分析；通過對各種異響故障特徵信號的分析研究，提出基於rspwvd的發動機多異響故障診斷策略，利用該策略可以準確識別不同的發動機異響故障。
  5. Linear frequency modulated ( lfm ) signals as the most popular pulse compression signal are a typical kind of time - varying, nonstationary signals, so applying the wigner - ville distribution into lfm signals has more advantages than conventional methods

    雷達脈沖壓縮技術中所使用的線性調頻信號是一類典型的時變非平穩信號，採用時頻分析的研究方法處理線性調頻信號有著傳統方法無法比擬的優點。
  6. It is has been known that the energy spectra statistic of a chaotic system agrees with wigner distribution which is achieved from random matrix theory and the one of a integrable system is poisson distribution achieved originally from the irregular spectra

    一個經典混沌系統的量子能譜統計分佈滿足由隨機矩陣理論所導出的winger分佈，而可積系統滿足無規能譜的統計分佈即泊松分佈。
  7. Simulation on identification of cracked rotor by wigner - ville distribution

    分佈裂紋轉子識別的模擬
  8. A comprehensive review of the basic analytical methods for the beam transformation including the matrix optics method, diffraction integral method and wigner distribution function method is summarized

    對研究光束傳輸變換的基本理論方法，包括矩陣光學方法、衍射積分方法和wigner分佈函數方法作了歸納。
  9. In the process of feature character comparison, some methods for characte r comparison are presented which are chamfer matching, the texture feature of gray matrix and texture analysis using wigner distribution

    在特徵字的特徵提取過程中，對字元的形狀特徵，運用距離變換匹配的方法；對字元的紋理特徵，採用基於遊程矩陣的分析方法和wigner分佈的分析方法。
  10. Fractional fourier transform of two - dimensional cosine - gaussian beams based on the wigner distribution function

    二維餘弦高斯光束基於魏格納分佈函數的分數傅里葉變換
  11. Firstly, according to the characteristic that the doppler frequency shift signal can be approximated as a single sinusoid signal, the extended sinusoid signal retrieval ( pisarenko and esprit ) methods are presented and signal state and measurement formulations are developed, so the kalman filter recursive method is got. the brief introduction of low velocity moving target doppler frequency shift signal wigner - ville transformation and wavelet transformation expression are presented in this paper. secondly, because the clutter is gaussian distribution, cumement and high - order spectrum based methods are presented and the simulation results prove their good performance to suppress gaussian clutter in low velocity moving target doppler frequency shift signal processing

    一個方面是根據低速目標的多普勒信號可簡化為單一正弦波形式這一特點，得到了擴展的高斯色噪聲背景下的諧波恢復演算法，即高斯色噪聲中的pisarenko諧波恢復法和旋轉因子不變法（ esprit ） ；並推導了信號的狀態方程和觀測方程，進而得到基於卡爾曼濾波的遞推演算法對信號進行提取；本文還簡單的介紹了低速運動目標的多普勒頻移信號的wigner - ville變換與小波變換；另一個方面是針對雜波服從高斯分佈這一特點，提出了對接收信號求累積量和高階譜來對高斯雜波進行抑制。
  12. Research and application of wigner - ville distribution algorithm

    威利分佈演算法研究及應用
  13. The signal processing of radar moving targets using polynomial wigner - ville distribution

    的雷達運動目標回波信號處理
  14. Wigner distribution function with generalized parameters a new double - domain joint representation of signals

    一種新的信號雙域表示方法
  15. Analysis of human colonic pressure signal based on smoothing pesudo - wigner - ville distribution

    基於平滑偽魏格納分佈的人體結腸壓力信號分析
  16. Chaper six compared the emd - based time - frequency analysis method to the typical ' s : short time fourier analysis, wigner distribution and wavelet anlysis, the result showed that the emd - based ' s is better than the others. to weaken the crossing interfere in multi - components signal in wigner distribution the emd - based wigner distribution was proposed and the study result showed that the method is valid. chapter seven built a experiment system at the base of rotor test bed, discussed characteristics of several typical fault in rotating m

    第六章把基於emd的時頻分析方法分別與短時傅里葉變換、 wigner分佈分析、小波變換進行了比較研究，結果表明，基於emd時頻分析方法比上述方法有效；針對wigner分佈分析的交叉項干擾，提出了基於emd的wigner分佈分析新方法，研究結果表明新方法能有效地消除交叉項干擾。
  17. Digital receiver and its forepart operational principle are discussed, then methods of instantaneous autorelation, short - time fourier transform, wigner distribution and wavelet analysis are introduced in detail. the advantages and disadvantages and the application range of these algorithms are given. based on the merits of these algorithms, a new method for signal modulation type analysis is presented

    本文討論了數字接收機以及前端的工作過程，然後詳細闡述了瞬時自相關、短時傅立葉變換、 wd演算法、過零檢測和小波分析等各種演算法在脈內調制分析上的應用，分析了各演算法的優缺點，提出一種并行處理模式：即針對不同的信號採用不同的演算法對脈內調制信號進行分析。
  18. 2. discuss the discrete form of time - frequency analysis ; give the simulations of wigner - ville distribution and short time fourier transform under different snr. at same time, to overcome the cross - term of wvd, choi - williams distribution and b - distribution are introduced

    以wvd為研究重點，對時頻分析的概念、性質做系統的介紹；給出常用的時頻分析形式，例如短時傅立葉變換、 wigner ? ville分佈；最後給出時頻分析的一般定義。
  19. Because the width of both the new kernel and modified kernel are adaptive to signal length, both of them avoid large loss of energy of autoterms while obtaining certain performance in reducing crossterms of wvd ( wigner - ville distribution )

    兩種新的核函數的寬度對信號長度具有自適應能力，所以在獲得了一定的交叉項抑制能力的同時，避免了較大的信號自項能量損失。
  20. In chapter 3, the paper presents the theory of wigner - ville distribution ( wvd ), pseudo wvd, smoothed pseudo wvd, discrete fourier transform ( dft ), fast fourier transforms ( fft ), and also expatiates on the

    第三章將對wvd 、 pwvd 、 spwvd分佈、 dft和fft變換的理論進行說明，並闡述跳頻解跳與數字中頻接收機的解跳原理。
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