方差矩陣 的英文怎麼說

中文拼音 [fāngchājǔzhèn]
方差矩陣 英文
covariance matrix
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 差 : 差Ⅰ名詞1 （不相同; 不相合） difference; dissimilarity 2 （差錯） mistake 3 [數學] （差數） differ...
  • 矩 : 名詞1. （畫直角或正方形、矩形用的曲尺） carpenter's square; square2. （法度; 規則） rules; regulations 3. [物理學] moment
  • 陣 : Ⅰ名詞1 （作戰隊伍的行列或組合方式） battle array [formation]: 布陣 deploy the troops in battle fo...
  • 方差 : dispersion
  • 矩陣 : [數學] matrix; array
  1. By using the optimized covariance matrices to optimize the new regularized discriminant analysis ( rda ), the correct classification rate is higher than that by the old rda

    利用優化的協方差矩陣對正則化判別分析方法進行優化，其模式分類正確率有顯著提高。
  2. Two indexes was calculated to estimate the best bands union for color combination, one is optimum index factor ( oif, the sum of standard deviation divided by the sum of correlation coefficient. ), the other is the determinant of the co - variance matrix. it can be seen from the result that for color combination the original optimal bands were tm 4, 3, 7 and tm 4, 3, 5, the best mixed images were mnf1, br and ndvi

    以協方差矩陣行列式值和最佳指數值（組合波段標準差之和除以相關系數之和）為評價標準，得出對于tm原始波段而言，最佳的彩色合成組合是tm4 、 3 、 7和tm4 、 3 、 5 ；綜合幾種變換圖像的彩色合成的最佳組合是mnf1 、 br 、 ndvi 。
  3. Main contents include man - made targets extraction based on scattering matrix, man - made targets extraction based on covariance matrix [ c ] and the extraction based on geometric feature. first, this dissertation provides an overview of the polsar theory

    主要內容包括:基於散射矩陣的polsar圖像目標提取演算法，基於協方差矩陣polsar的目標提取演算法和基於幾何特徵的人造目標提取演算法等方面。
  4. Based on the multi - scale representation theory, we present a reduced order model for the solving of the inverse problem. also the relative error covariance matrix is used to analyze the performance of models with different orders ; 4

    基於小波多尺度表示理論給出逆問題求解的多尺度降階模型，同時用相對誤差協方差矩陣對階數不同的降階模型的估計精度進行分析； 4
  5. Simplified gauss - markov estimate with singular noise variance

    估計在噪聲方差矩陣不可逆時的化簡
  6. The final results obtained in this paper contained that the optimal interpolation scheme highlighted by the covariance that the correlation between different time and the correlation between different place being considered ; that the simplification of kalman filter with the singular - value decomposition ( svd ) and the direct construction of state transition matrix pfeceded with " inverse vector expression " ; and that the analysis of t / p data and its blending with theoretical model

    這些成果包括：建立考慮了時間相關的方差矩陣和時空相關的最優插值演算法；對卡爾曼濾波演算法進行了svd簡化以及建立了顯式的狀態轉移矩陣；將t p實時衛星數據進行調和分析並與數值模型進行同化處理。
  7. There is no consideration of time misfit in traditional optimal interpolation. in this thesis, some researches were done on the methodology of optimal interpolation, in which a new form of the formulae was developed that named dynamic optimal interpolation, the time correlation being introduced

    本文首先推導了既考慮空間相關，又考慮時間相關的最優插值演算法，由於應用了時間相關的協方差矩陣，就使這個演算法具有動態處理時間錯位的觀測數據的能力。
  8. At first we compare some kinds of investment loss function, analyze their defects and take the eignvalue of covariance matrix as the measurement of investment risk, the principle component as the information of investment market, sn and cv of the principle component as balance relationship between the profit and risk. then different portfolio selection indexes are given, and new portfolio selection models are presented, which are different from h. markowitz model. at last an example is also given

    本文首先比較了幾種常用的投資損失函數，在分析它們的缺陷與不足的基礎上，提出了採用收益率的協方差矩陣的特徵根刻畫投資的風險；用主成份綜合反映證券市場的信息；分別採用主成份的差異系數與信噪比反映投資組合的期望收益率與風險之間的均衡關系，並以此作為投資組合損失最小化與收益極大化的指標；得到了不同於h
  9. There are mainly two type of algorithms used for spatial spectrum estimation : one is those based on bayesian maximum likelihood method, like the ml ( maximum likelihood ) algorithm, maximum entropy method and etc., the others are based on the spatial decomposition or projection of correlation matrix, this kind of algorithm include vector characterization method, music ( multiple signal classification ) algorithm, projection matrix method, etc. music is a classical spatial spectrum estimation algorithm that has a super high resolution and is widely used today, however, it cannot estimate doa of signals that are correlated

    空間譜估計的演算法大致分兩大類:一是基於極大似然估計和最大后驗概率估計統計理論的演算法，包括:極大似然估計法（ ml ） 、最大熵法等;另一類是基於對協方差矩陣進行子空間分解或投影的演算法，包括:矢量特徵法、多重信號分類法（ music ） 、投影矩陣法等。其中， music法是一種經典的空間譜估計主流演算法，具有超強的分辨性能，但它無法實現對相干信號進行測向分辨。
  10. Discusses the characteristic values on individual stock risk with the standard deviation, variance ( 2 ), standard deviation coefficient ( cv ) and coefficient measurement, construct the individual on stock ' s statistics index system on investment risk. 2. discuss the characteristic of standard deviation, variance, variance - covariance matrix to measure the investment risk of stock portfolio

    第二章「證券投資風險的度量」分為三個小節： 1 、討論單個證券風險用標準差（ ） 、方差（ ~ 2 ） 、變差系數（ cv ）以及系數度量，構造了單個證券的投資風險統計指標體系； 2 、討論了用標準差和方差、方差?協方差矩陣、方差?協方差矩陣的特徵值來度量組合證券的投資風險； 3 、計算了衡量證券組合系統性風險的系數值，並分析了系數的含義和預測能力的可靠性。
  11. Under ideal conditions, adaptive array signal processing methods can get excellent performance and adaptive beamformers provide an improvement in array output signal - to - interference - plus - noise - ratio ( sinr ) in comparison with conventional beamforming. in practical operating circumstances, the performance of adaptive array signal processing methods degrade extremely due to existing errors

    但是，在實際系統中總存在有誤差，包括自適應訓練樣本有限次快拍引起的協方差矩陣的估計誤差和各種系統誤差，誤差使得實際陣列流形與理想陣列流形存在差異，這時自適應陣列信號處理的性能會急劇下降。
  12. Then, sage adaptive filtering usually used in kinematic gps navigation and positioning and its shorcoming are analyzed. the weights of measurement residuals and state correction residuals are modified according to the self - correlation property of colored noise and robust estimation. the procedure of weighte d prediction of covariace matrix not only resists the influence of outlying kinematic model errors, but also controls the effects of measurement outliers

    然後，分析了目前常用於有色噪聲處理的sage自適應濾波及其在動態gps導航定位應用中的缺陷，並依據有色噪聲的自相關特性和抗差估計調整觀測殘差和狀態改正數的權比，再通過加權預報控制殘留在其中的異常對協方差矩陣自適應估計的影響。
  13. Through the i 、 q component of ipix radar sea clutter data " s histogram analyses and by skewness and kurtosis computed, it is been shown that sea clutter amplitude is not rayleigh distribution ; through the comparison of amplitude histogram and distributed models with the same parameters, it is been shown that hh polarization clutter is lognormal distribution, whereas vv polarization is k - distribution ; at the same time the correlation function and power spectrum density are been analyzed, at last the correlation compound k - distribution stochastic sequences whose covariance matrix is been given are been generated through sirp algorithm

    文中先介紹了海雜波幅度的有關模型，通過對ipix雷達海雜波數據的i 、 q分量的直方圖以及傾斜度和峰度進行了分析和計算，證明了海雜波幅度不服從瑞利分佈;使用幅度直方圖和相同參數下的各種分佈模型進行比較，得出hh極化符合對數正態分佈，而vv極化服從k -分佈的結論;同時對海雜波的相關函數和功率譜進行了分析，最後使用sirp演算法產生了給定協方差矩陣的相關復合k -分佈隨機序列。
  14. An appropriate cost function is constructed which avoids the use of the logarithm likelihood function that is lack of robust to the noise correlation, moreover, our method have many advantages such as, low complexity, suitable for coherence signals, etc

    構造適當的代價函數，避免了對數似然函數的使用，該方法對色噪聲協方差矩陣特徵值分散具有穩健性，同時具有較低的計算復雜度和適用於相關甚至相干源等優點。
  15. A real - time estimation of a prior variance - covariance of gps observations is developed for the ( near ) instantaneous ambiguity resolution for short - baselines, which improves the stochastic model of the observations, and then the success rate and the reliability of ambiguity resolution

    針對短基線模糊度的快速解算，提出了一種實時估計觀測值方差-協方差矩陣的方法，改進了觀測值的統計模型。算例顯示這種方法能提高模糊度瞬時解算的成功率。
  16. This method constructs covariance matrix by utilizing data vectors in different range lines and projects phase error vector into noise sub - space which is formed by eigendecomposing the covariance matrix

    該方法利用不同距離單元的觀測矢量構造協方差矩陣，然後通過對協方差矩陣特徵分解得到噪聲子空間，最後將相位誤差矢量向噪聲子空間投影來估計多普勒調頻率。
  17. The experimental results on orl face database show that by the proposed improved method, eigenvalues of the optimized covariance matrices become larger and the matrices inverses become more stable

    在orl人臉庫上的實驗表明，優化后協方差矩陣的特徵值均顯著變大，使該矩陣的逆陣穩定性得到了提高。
  18. We analyses the different result of pca by using autocorrelation matrix and covariance matrix, and point out that the express of pca is different but the error are the same

    分析了用協方差矩陣和自相關矩陣得出的pca表達是不同的，但是兩者的誤差是相同的。
  19. Since a pseudo - covariance matrix of the observed signals supply additional constraints if the sources are assumed to be independent and improper, it can be proved that the second order statistics is sufficient to separate the mixed complex - value signals for both stationary and non - stationary sources

    假設源信號是獨立的且非常態，信號的偽協方差矩陣能增加約束條件，從而可證明二階統計量能夠完全分離復值混合信號，而且對信號是否平穩不作要求。
  20. When this csi is in terms of channel covariance feedback, the transmit directions for achieving ergodic capacity correspond with the eigenvectors of the channel covariance matrix, while the optimal power distribution can not be solved in closed form

    當發射端具有通道協方差矩陣信息時，使得平均通道容量達到最大的發射方向和通道狀態協方差反饋矩陣的特徵矢量相一致，而相應的發射天線上的最優功率分配則難以解析獲得。
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