spectral decomposition 中文意思是什麼

spectral decomposition 解釋
光譜密度
  • spectral : adj. 1. 鬼的;鬼怪(似)的。2. 【物理學】光譜的。
  • decomposition : n. 1. 分解,分析,溶解,還原(作用)。2. 腐朽,解體。
  1. The inconsistent excitation can be decomposed into a series of irregular incident waves in terms of the spectral decomposition scheme of the hermitian matrix, with which the coherency function of the ground motions under the inconsistent excitation can be obtained numerical results are given to show its stability and rationality

    該方法將隨機輸入下的波動分析問題轉換為多個虛擬激勵下的確定性波動分析組合問題,從而可以方便地獲得場地波動觀測量之間的譜密度矩陣,進而計算給出工程場地的地震動相干函數本文還用數值模擬的辦法對所提出方法的合理性和穩定性進行了探討。
  2. Numerical simulation signal and vibration acceleration signal of a roughing mill main drive speed reduction unit have been decomposed by using empirical mode decomposition algorithm ; each component has been carried on spectral analysis

    摘要運用經驗模式分解演算法對數值模擬信號及某軋鋼廠粗軋機主傳動減速機振動加速度信號進行了分解,從而得到若干個基本模式分量,對每個模式分量進行了頻譜分析。
  3. In this thesis, complex analytical band - pass filtering based method is proposed to reduce the modulation complexity ; polyphase decomposition is used to reduce the filtering complexity ; uniform dft filter banks based method exploits the center frequency distribution characteristic of filter banks to reduces the modulation and spectral resort processes

    而基於均勻dft濾波器組的演算法充分利用了濾波器組的中心頻率的分佈特點,省略了復頻移環節和整序環節,同時利用多相分解的方法改善了濾波環節,兼有各種方法的優點而大大的提高了演算法的實時性。
  4. Spectral decomposition technology makes the theoretical resolution of the common seismic data achieved

    摘要譜分解技術使常規地震資料達到理論解析度。
  5. Some characteristics of the measured wind pressure field were discussed, including distributions of wind pressure, the effects of shape ratio on total wind force coefficients, auto - and cross - power spectral density ( psd ) distributions of fluctuating wind pressure, characteristics of the proper orthogonal decomposition ( pod ) results of the measured wind pressure field, effects of reynolds number on wind pressure distributions, etc

    根據測量結果對殼體表面風壓場特性進行了分析,包括風壓系數、整體風力系數、脈動風壓自功率譜及互功率譜、風壓場本徵正交分解特性、雷諾數對殼體表面風壓分佈的影響等。
  6. On spectral decomposition estimates in mixed linear models

    線性混合效應模型參數的譜分解估計
  7. ( 2 ) a series of new methods of feature extraction based on the optimal discriminant analysis are proposed, including the new lda algorithm based on the spectral decomposition of within - class scatter matrix sw which is effective when the number of class is small, an improved algorithm of optimal set of discriminant vectors based on the svd which is effective for face recognition, and the kernel fisher discriminant method ( kfdm ). experimental results on orl show that the kfdm outperforms conventional fisher discriminant methods in face recognition, however the computational load is much higher than those of conventional algorithms

    ( 2 )提出了基於最優鑒別分析的圖象特徵抽取的一系列新方法,它們包括:基於對類內矩陣s _ w進行譜分解的f - s最優鑒別矢量集方法,該方法在類別數比較小時非常有效;一種改進的基於svd的最優鑒別矢量求解演算法,將該方法用於人臉識別時有較好的性能;非線性最優鑒別矢量集方法,該方法雖然有效,但計算時間較長。
  8. 4 different types ’ features were generated, namely ar model parameters, power spectral frequency band intensity, energy for wavelet packet decomposition, wavelet packet entropy. every type of features were extracted respectively using pca and ica method and classified using linear neural network, knn and bp network

    建立了ar模型參數、功率譜估計頻帶強度、小波包分解能量比率、小波包熵四種特徵,分別使用pca與ica進行特徵提取,採用線性神經網路、 k -緊鄰法、 bp神經網路四種分類器進行分類。
  9. Spectral decomposition technology has been used in reservoir prediction in areas of complex geological settings

    目前,譜分解技術在復雜地質情況下的儲層預測中得到全面推廣。
  10. Based on the existing spectral independent component analysis ( spectral ica ) and non - negative constrained decomposition, a moving time window is introduced, and multiple dominant spectral components are extracted within the short - time window

    結合已有的頻域獨立成分分析方法以及帶約束的非負分解處理,引入時間滑動窗口,在短時窗內動態提取多重主導功率頻譜。
  11. Super resolution pitch detection based on band - partitioning spectral entropy and signal decomposition in dct domain

    分帶譜熵與信號分解的高精度基音檢測演算法
  12. In this paper, we mainly discuss positive operators and some relevant problems. on the one hand, we investigate c0 semigroups on banach lattice, and obtain some properties of local spectral radius, the solution of operator equation, the decomposition of lattice space and the generators of semigroup and dual semigroup

    本文主要從兩個方面討論正運算元理論中的幾個問題,一方面對banach格上c _ 0 -半群的性質進行了深入研究,利用半群的局部譜半徑,得到了正運算元方程有正解的條件。
  13. In the paper, firstly, present the formulation and application of proper orthogonal decomposition of covariance and cross - power spectral density matrices are presented in the analysis of wind load effects on structures. then the dynamic response of linear structures subjected to random loads is analyzed by a technique called double modal transformation ( dmt ) that is expressed through a double series whose terms depend on structural and loading modes

    本論文中首先通過求相關矩陣和互功率譜密度矩陣特徵值問題給出了本徵正交分解的公式,並利用pod與結構模態相結合的雙模態方法來分析結構的動態響應,主要討論了截斷高階荷載模態對風致響應的影響。
  14. A novel dynamic time - frequency process monitoring method based on multivariate spectral decomposition is proposed

    摘要提出一種基於多變量頻域分解的新型動態時頻監控方法。
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