方差估計 的英文怎麼說

中文拼音 [fāngchāgūjì]
方差估計 英文
estimate of variance
  • 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...
  • 估 : 估構詞成分。
  • 計 : Ⅰ動詞1 （計算） count; compute; calculate; number 2 （設想; 打算） plan; plot Ⅱ名詞1 （測量或計算...
  • 方差 : dispersion
  • 估計 : estimate; evaluate; take stock of; size up; calculate; appraise; reckon; estimation; forecast
  1. The additive genetic variance of the same character, estimated from the covariance of half sibs, was 0. 9602.

    從半同胞協方差估計出來的，同一性狀的加性遺傳方差為09602。
  2. Abstract : since the multiple failures situation is not uncommon in the clinical medicine, we explore the use of proportional odds model to the multivariate interval - censored data. the approach is based on the conditional logistic regression, which prevents the complications in the existence of nuisance parameters. the estimation of parameters is obtained by the newton - raphson algorithm. the sandwith estimator for the covariance is made according to the situation where there is correlation in the score statistic. simulations are also presented to assess the accuracy of the procedure

    文摘:探索比例優勢模型在臨床醫學中常見的多結局區間截斷數據中的應用.用條件的邏輯回歸方法避免討厭參數的估計，用牛頓-拉普森演算法估計回歸系數，用"夾心方差"估計量作為參數方差的估計.通過隨機模型檢驗模型應用的有效性
  3. The additive genetic variance of the same character, estimated from the covariance of half sibs, was 0. 9602

    從半同胞協方差估計出來的，同一性狀的加性遺傳方差為0 9602 。
  4. Aiming at the nonlinearity of state and measure equation and measurement being only angle information, which results in poor observability and classical estimate methods such as extended kalman filter not converging, the boost phase states and covariance are estimated using unscented kalman filter ( ukf )

    針對狀態方程和觀測方程都是非線性方程，觀測量只有角度信息，造成可觀測性弱、經典的濾波演算法如擴展卡爾曼濾波方法不易收斂的問題，利用unscented卡爾曼濾波ukf演算法對主動段進行狀態和協方差估計。
  5. For a general linear model ( input matrix is deterministic ), under a certain conditions on variance matrix invertibility, the two estimates can be identical provided that they have the same priori information on the parameter under estimation. even if the above information is unknown only for the optimally weighted ls estimate, the sufficient condition and necessary condition, under which the two estimates are identical, is derived. more significantly, we know how to design input of the linear system to make the performance of the optimally weighted ls estimation identical to that of the linear minimum variance estimation in case of being lack of prior information

    在一般線性模型（即輸入矩陣為確定性）下，當兩種估計都利用有關被估參數的先驗信息時，二者在方差陣可逆的一定條件下可達到一致；當最優加權最小二乘估計不利用此先驗信息時，存在二者一致的充分條件和必要條件，進而找到一種設計輸入矩陣的方法，使得在先驗信息缺乏的條件下，仍可利用最優加權最小二乘估計達到與線性最小方差估計一樣優越的估計性能。
  6. The paper accounts the importance and the necessity of the forecasting research to the stock return volatility of our country, and the use in practice of the forecasting about the stock return volatility, firstly, stock market of our country is divided into large scale stock 、 middle scale stock and small scale stock on the basis of stock size. secondly, according to the basic method of the mathematical statistics ， the behavior of the return volatility about single stock is described by using the model of the rolling variance estimates 。 through the relation of daily returns volatility and weekly returns volatility and the forecasting accuracy of the volatility forecasting model to various stock scale ， we do practical analysis with the forecasting research to return volatility of single stock market

    在個股收益波動性的可預測性研究方面，首先按市值規模大小將我國股票分為大盤股、中盤股和小盤股，然後利用數理統計的基本方法，用滾動樣本方差估計模型描述個股市場收益波動性的行為，並對三種股票日收益率序列及周收益率序列波動之間的關系以及波動預測模型對各種股盤的預測準確性進行了實證分析和結果檢驗。
  7. Based on the linear unbiased minimum variance estimation theory, an asynchronous fusion algorithm that fused the state vector of linear system with arbitrary correlated noises is developed

    摘要基於線性無偏最小方差估計理論，提出了一種任意相關雜訊線性系統非同步狀態向量融合演算法。
  8. Then we give the necessary and sufficient condition under which the optimally weighted ls estimate is identical to thu conditional mean of the parameter given input and observation, i. e., the optimally weighted ls estimate could be optimal nonlinear estimate in the minimum variance sense

    在方差陣可逆的條件下，我們發現最優加權最小二乘估計優于線性最小方差估計，進而得到了其與最小方差估計（即條件均值估計）等價的充要條件。
  9. An on - line minimum - variance estimator was developed for thrust acceleration applied to orbit transfer using discrete - time radar measurements. the mass - flow - rate of propellant was selected as a state variant, which was estimated by employing an integral state model and ekf filter. the variation equations for measurement vector to mass - flow - rate have been established to linearize the discrete - time measurement equations. the algorithm has applied successfully to maneuver process in commanding satellite into geo - stationary orbit. the results show that the algorithm developed here can monitor and determine whether engine works well or failure precisely and quickly during orbit transfer process

    飛行器軌道機動過程中，為跟蹤、定位機動目標和干預機動控制過程，需要統計處理離散的雷達觀測量實時估計推進發動機的推力，進而確定飛行器的瞬時軌道參數.本文所述演算法是該工程問題的探討和解決方案.文章建立了軌道機動過程中連續變質量運動模型和離散雷達量測模型，推進發動機的質量秒耗量作為表徵推力加速度的一個近似常量，應用擴展卡爾曼濾波對離散的雷達測量數據進行順序統計處理給出秒耗量的最小方差估計;文章詳細地推導了線性化量測模型的變分方程和觀測矩陣;模擬結果表明該演算法能快速、準確地估計推進發動機的質量秒耗量和向機動目標施加的實際推力
  10. Another method using complex wavelet transform and interscale model is more complex and need more time to get the final result, but it is more accurate. this paper builds a intersale models for the module of complex wavelet coefficients

    一般的復小波系數的層間模型都是對它的實部和虛部分別建立模型，而本文對復小波系數的幅值建立層間模型並且改進了方差估計方法。
  11. The adaptability of the national sugarbeet variety test in 2002 was analyzed through statistical parameter of variance and coefficient of variability from variety locus of test data

    摘要通過對2002年國家甜菜品種區城試驗結果的統計分析，求得各參試品種的適應性統計參數品種地點互作方差估計值和變異系數，據此對參試品種進行適應性分析。
  12. In this case optimally weighted ls estimate is not a linear estimate of a parameter given input and observation anymore and can not be compared with linear minimum variance estimate

    在這種情況下，最優加權最小二乘估計變成關于觀測和輸入的非線性估計，且與線性最小方差估計不可比。
  13. The ukf generates better estimates of the mean and the covariance of the states, leading to faster convergence

    Unscented卡爾曼濾波演算法不僅能夠給出更精確的均值和方差估計，而且還能帶來更快的收斂速度。
  14. An adaptive kalman filter combining variance component estimation with covariance matrix estimation based on moving window

    基於移動開窗法協方差估計和方差分量估計的自適應濾波
  15. After converting multiple speckle noise to additional gaussian noise, we achieve the mmse estimate of sar image wavelet coefficient

    將乘性噪聲轉化為近似加性高斯噪聲，可以獲得sar圖像小波系數的最小方差估計。
  16. Allan variance estimated by simulated noise and calculated theoretically using power law model are well matched. the effect of phase noise on azimuth focusing is given by monte carlo experiment

    模擬相噪得到的allan方差估計值與冪律模型得到的allan方差理論值符合得較好。
  17. Minimum variance estimator

    最小方差估計量
  18. Linear minimum variance estimate and optimally weighted ls estimate are often used in many fields such as signal processing, control and communications. kalman filtering is the recursive version of ihe first estimate

    在信號處理、控制和通訊等技術領域，常常使用線性最小方差估計和最優加權最小二乘估計對參數作出估計。
  19. Minimum variance estimation

    最小方差估計
  20. In this paper we mainly discuss the problem about minimum variance estimation for linear model and bring out the relevance and difference of performance between the two methods in order to provide theoretic foundation for choosing appropriate estimation method

    本文針對這種線性（觀測）模型下的最小方差估計問題進行了深入討論，指出這兩種估計性能之間的關系及差別，從而為選擇恰當的估計方法提供理論依據。
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