covariance method 中文意思是什麼

covariance method 解釋
共變法
  • covariance : n. 【統計學】協方差，協變性；共離散。
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  1. Based on the method expressing the positional uncertainty of point entities in surveying and mapping, uncertainty ellipse was employed to characterize the uncertainty region for the error dispersal of 2d target ' s position, and uncertainty ellipsoid for the 3d target. 1 - uncertainty ellipse was derived from positional error covariance

    借鑒測繪學科中衡量點元位置不確定性的方法，分別用橢圓和橢球來表示二維目標和三維目標的位置誤差散布的不確定性區域。
  2. Space spectrum estimation technology has a comprehensive perspective in the military and civilian applications, the estimation method based on higher - order statistics has better performance than that based on covariance. firstly, the thesis introduces the definitions and the attributes of the higher - order statistics

    空間譜估計技術在軍用和民用方面都有著廣泛的應用情景，將高階統計量應用於空間譜估計，所得到的性能要好於基於協方差的空間譜估計。
  3. Variance and covariance components of each effect were estimated by minimum norm quadratic unbiased estimation ( minque ) method

    用minque法估計各項效應的方差和協方差分量，用aup法預測隨機效應。
  4. This text aims to establish mathematics model, everyday randomicity variable to be set up by the discrete transformation method, to set up the simulation parameter form and the moleling and covariance form, draw the procedure flow chart to proceed simulative newspaper calculator problem

    摘要通過建立數學模型、運用離散反變換法產生每天賣報數隨機變量、建立模擬參量表和建模及統計變量表、畫出程序流程圖等步驟對報童問題進行模擬。
  5. Furthermore, utilizing the characteristic that filtering error covariance expresses filtering precision and the principle of information conservation, the dynamic and reasonable distribution of distributed tracks weight coefficient is accomplished. jerk model and strong tracking filter is organically assembled, and based on spatio - temporal synthetically analysis and lme, a self - learning estimation method of the system measurement variance is given. the method improves obviously the

    3 、將jerk模型與強跟蹤濾波演算法有機地結合，並利用時空綜合分析和極大似然估計的思想推導出了一種系統量測方差自學習修正方法，以優化強跟蹤濾波演算法中次優漸消因子和濾波增益的在線選擇，同時根據多傳感器數據融合具有改善濾波精度的性質，進而給出一種基於jerk模型的多傳感器數據融合演算法。
  6. First, the thesis introduces the definitions and the attributes of the higher - order statistics. it is insensitive to additive gaussian noise ( white or colored ), which is what we base on to doa problems. then two doa estimation algorithms based on higher - order statistics are presented, one is that forming cumulant matrix pencil used in esprit to estimate doa problems, the other is spectrum estimation method for doa estimation based on the eigenstructure analysis of the fourth - order cumulant, and comparing the effects of the estimation to conventional covariance - based doa algorithms "

    論文首先對高階統計量的定義和性質作了介紹，特別指出了高階統計量對加性高斯噪聲（白色或有色）不敏感，這是我們利用它進行波達方向估計的理論依據，然後文中提出了兩種基於高階統計量的波達方向估計方法，一種是利用子空間旋轉不變技術構造四階累積量矩陣進行估計的方法，另一種是基於四階累積量陣特徵分解的空間譜估計測向方法，並將它們的估計效果與傳統協方差方法的效果進行比較。
  7. Both can improve the performance of state estimation. due to former condition, the method that the power equations are resolved directly to decide the placement is applied. the method, which reduce covariance errors of the measurements, is adopted under the later condition

    前者採用使系統功率方程直接可解的方法確定pmu的測點布置；後者採用減小狀態估計量測量的誤差方差的方法宋確定pmu的測點布置。
  8. 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。
  9. 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。
  10. Traditional inertial mechanized - platform uses velocities to damp the system attitude to improve the precision of attitude, when the system acceleration is small. referring to the idea, this paper designeda damp kalman filter in strap - down attitude heading reference system ( ahrs ). the new method makes use of 3 - d accelerometer ' s measurements to estimate the system attitude, which is measured to compensate attitude errors. because the acceleration affected the precision of fiher directly, the fuzzy adaptive system was presented. the fuzzy logic inputs are three accelerations and the output is to control the measurement noise covariance matrix. simulations and experimental results prove that the damp algorithm can damp most of schuler oscillation and foucauh oscillation, so that to assure the filter convergence and efficiently improve the precision of strap - down ahrs

    在系統機動性不強的情況下，傳統的平臺內阻尼演算法將系統本身的速度信息通過阻尼網路加到系統中，達到提高姿態角精度的目的.將這種平臺內阻尼的思想引入到捷聯慣性航姿系統中，在系統加速度較小的情況下，利用加速度計的輸出估計系統姿態角，通過卡爾曼濾波的形式補償系統姿態誤差.由於加速度的大小直接影響濾波器精度，本文設計了模糊自適應卡爾曼濾波演算法，根據三軸加速度計的輸出調整內阻尼量測誤差方差陣，從而避免了濾波器的發散.模擬和實驗驗證，內阻尼演算法可明顯抑制舒勒周期振蕩和傅科周期振蕩，避免了系統姿態漂移，有效提高了捷聯慣性航姿系統的精度
  11. ( 3 ) adaptive sample algorithm such as predicted covariance threshold method, pre - establish sample interval method, and recursive method have been researched. we especially analyze the advantage and disadvantage of predicted covariance threshold method and pre - establish sample interval method, and present an improved pre - establish sample interval method

    分析了當前常用的預測協方差門限法，預先定義采樣間隔法以及遞推法，特別分析了預測協方差門限法和預先定義采樣間隔法的優缺點后，綜合兩者的優點提出了改進的預先定義采樣間隔法。
  12. Mastering the output format of covariance of neutron cross section in endf / b - 6 evaluated nuclear data library, clearly understanding the meaning of each physical quantity, grasping the mathematical methods pf covariance for experimental nuclear data and evaluated nuclear data, a set of evaluation processing method was deduced from the meaning of cross sections and errors. and then a program was developed for evaluating and processing the covariance matrix of experimental data, which are output in the endf / b - 6 format

    在熟悉endf / b - 6評價中子核數據庫協方差文檔的格式要求，確定各個量的物理意義，並掌握實驗和評價數據的協方差數學處理方法的基礎上，由截面數據及截面誤差的物理意義，推出了一套合適的評價處理方法，最後編寫了按endf / b - 6格式輸出的協方差數據評價處理程序，作為中國評價中子核數據庫（ cendl ）協方差文檔的數據輸出程序。
  13. 7. based on the comparison with dual band gps phase and c / acode, ambiguity function method, least squares search, ambiguity solution covariance, cholesky disintegrate and least square ambiguity decorrelation adjustment, it is considered the method of ambiguity function using double gps antennas to move baseline and the equation of dual differential carrier phase

    在分析雙頻p碼偽距法、模糊度函數法、最小二乘搜索法、模糊度協方差法、 cholesky分解法、和lambda演算法的基礎上，重點研究基於雙gps天線動一動基線載波相位雙差整周模糊度確定方法。
  14. The accurate float ambiguity solutions and their msem ( mean squared error matrix ) are obtained using several - epoch single frequency phase data. combining with lambda method, the new approaches can fix the integer ambiguities correctly and quickly using msem instead of the covariance matrix of the ambiguities

    新方法只需要解算幾個歷元的單頻gps相位數據，可以得到比較準確的模糊度浮動解及其相應的均方誤差矩陣，用均方誤差矩陣代替協方差陣，結合lambda方法，可準確快速地解算模糊度。
  15. This filter is a combination of adaptive ud decomposition kalman filter with quad method. it use quad method to detect and correct the gross errors in observations, use ud decomposition technique to improve computation precision and overcome the instability of filter caused by instability of values, when divergence of kalman filter had been detected, an adaptive filter is employed to adjust the prediction error covariance matrix

    該法用擬準檢定法準確地探測和修正量測方程中存在的粗差；用ud分解演算法改進了計算精度，克服了由於數值不穩定帶來濾波的不穩定性；當判斷濾波器發散后，則啟用sage自適應濾波器，調整預測誤差方差，以克服濾波器的發散。
  16. From the point view of high dimensional data processing, we get the essence of pca, and also easy to explain this difference between autocorrelation matrix method and covariance matrix method

    用高維空間數據處理的觀點，指出了pca的本質，並從高維空間中，解釋了不同方法得到不同pca的原因。
  17. Aiming at the black - box case that local kalman filters provide only the parameters and covariance matrices of filtered states, a novel multi - model adaptive estimator is designed on the basis of the united ci method

    在前述保守最優數據融合演算法基礎上，針對局部kalman濾波模型只能給出濾波狀態參數及其方差陣的情況，設計了一種新型的多模型（ mm ： multi - model ）自適應估計器。
  18. Suspension parameter optimization of farm transport vehicle using covariance method

    協方差分析方法優化農用車懸架參數
  19. The history of the industrial structure ' s research is shorter compared with western and economic theories although, because of its importance to develop to economy, from last century since then on the many economist were absorbed in researching it. but the majority of expert covariance industrial structure evolve phenomenon, and induce out some regulations from the covariance phenomenon. this kind of method makeing research can make the theory and actual fit together, but this kind of method also have its blemish, it could not nicely announce to public the industrial structure regulation that evolve from the deep level of structure with the economic logic, for the further development of industrial structure theories deeply, it is disadvantageous

    對產業結構研究雖然沒有西方經濟理論研究歷史久遠，但由於它對經濟發展有著重要意義，所以從上個世紀以來許多著名的經濟學家都致力於產業結構的研究，但這些研究中大多數研究都是通過對經濟發展中產業結構演變的現象加以歸納，總結從而得出產業結構演進規律，這種方法固然使理論與實際能很好的吻合，但只是對現象的簡單加工，並沒有從深層次去揭示產業結構演進的內在規律，這也不利於產業結構理論進一步深化和發展。
  20. First, using the scale - invariant property of multiscale model, i. e. markovian among scales, a method of qth - order tree - based for multiscale representation of a class of 1 - d stochastic process is presented. the multiscale stochastic model is established. the representation forms of parameter matrices, such as, the state transition matrix, the disturbance matrix, the initial state and the corresponding covariance matrix are deduced in detail

    本文在已有工作的基礎上，開展了以下幾個方面的研究工作： 1 、根據多尺度模型尺度不變性，即利用尺度間的markov性，給出了一類1 - d隨機過程基於一般q階樹的多尺度表示方法，建立了相應的多尺度動態模型，詳細推導了多尺度模型中的狀態轉移陣、擾動陣、初始狀態和相應的協方差陣，並通過計算機模擬給出了不同階樹的多尺度采樣路徑。
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