方差法 的英文怎麼說

中文拼音 [fāngchāfǎ]
方差法 英文
variance method
  • 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...
  • 法 : Ⅰ名詞1 （由國家制定或認可的行為規則的總稱） law 2 （方法; 方式） way; method; mode; means 3 （標...
  1. And then facing the problem of the channel estimation of the adaptive modulation system, we conclude out the channel estimation algorithms on maximum likelihood ( ml ) estimation and maximum a posteriori ( map ) estimation under the condition of flat fading channel and selective fading channel in detail. to meet flat fading channel, we simulate the relationship of the ratio between the error covariance in map estimation and ml estimation and pilot symbol message length. the conclusion can be drawn from these results

    接著，對自適應調制系統中的通道估計問題難點，詳細推導了平衰落通道條件下和選擇性衰落通道條件下最大似然（ ml ）估計和最大后驗概率（ map ）估計演算法，針對平衰落通道，我們模擬了map估計和ml估計的方差與導頻符號長度的關系，模擬結果表明，錯誤方差受多譜勒頻率的變化影響最大，並且對實際的自適應調制系統，導頻符號長度的取值超過20個符號長度時， map通道估計明顯優于ml通道估計。
  2. And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed

    研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。
  3. The methods of direct measurement with low precision such as frequency and time interval methods and the methods of indirect measurement with high precision such as beat frequency method, dual mixer time difference method and frequency difference multiplying method are supported on the platform. the fundamentals of each method are studied. the quantization error is analysed and the illustration is given for each method

    該平臺支持直接頻率和時差法兩種較低精度的測量方法以及雙混頻時差法、差拍頻率法和頻差倍增法高精度的簡接測量方法，本文研究了各種測量方法的原理，對各種測量方法的量化誤差作了分析，並給出具體的實例。
  4. We have to use some other methods to measure the luminosity or equivalently the absolute magnitude of the cepheid variable. since we can readily measure the apparent magnitude of a cepheid variable, to measure the luminosity means measuring the distance. we use some distance measurement methods, for example, parallax, to determine the relation

    要弄清這個關系，我們要知道不同造父變星的光度和光變周期數據，量度光變周期當然不是問題，但要得知一顆恆星的光度，我們首先要得知它的距離，這時便須藉助好像視差法等其他量度天體距離的方法。
  5. And then, some common methods of gdm, such as the ahp method, the weighted geometric mean method ( wgmm ), the borda - kendall method, the minimum variance ( mv ) method, the clustering analytic method, the cook - seiford distance measure, cb measure, the maximum and the minimum expected values, the concordance and discordance indices, etc., are used to discuss some consensus problems of gdm, including the consistency of the complex judgment matrix in ahp, the consensus methods of the aggregation of individual preferences ; the aggregation of analytic hierarchy process methods based on similarities in decision makers " preferences, a consensus measure on multiple criteria group decision making

    接著本文採用了群體決策中常用的一些方法（如： ahp法，加權幾何平均法， borda - kendall方法，最小方差法，聚類分析法， cook - seiford距離測度法， c _ b測度法，最大最小期望值法，一致性非一致性指標法等）對群體決策中的幾個一致性問題進行了研究，這些問題包括： ahp中復合判斷矩陣的一致性，個體偏好序集結的一致化方法，基於決策者偏好相似性的層次分析模型的集結中的一致性問題和多準則群體決策的一致性測度。
  6. This index then is decided to contain the fluctuation of both income and consumption instead of focusing only on one factor, and it should be measured by the squared resid of the time serial simulation of variables, rather than commonly used group variations or other indirect indices, which are quite different from formal researches. besides, the accuracy of the ecm model will be greatly underlined

    在計量方法上，筆者分析了各種方法的利弊，最終放棄了前人常用的組間方差法、間接變量法和主觀報告法，而使用了更切合經濟含義且更具相關性、更客觀的殘差平方（對變量進行時間序列模擬后得到，稍後會作取對處理） 。
  7. The paper reviewed the history of risk & return measurements, analyzed their limitations, and advanced a more perfect measure : semi variance with capital factor

    文中回顧了20世紀50年代以來投資風險與收益的計量歷史，在分析了各種計量方法的缺陷之後，作者提出了更為理想的風險與收益計量方法? ?加入資本因素的半方差法。
  8. In the course of measurement of workpiece face runout, variance method of the most species based on separability and image edges distilling based on morphology and marr filtering based on edges segmentation are used to enhance effectively accuracy of image segmentation and edges distilling. accuracy of measurement of face runout is enhanced effectually by use of least square method of compressing rectangle fitting edge of image and transforming of dft

    該系統在工件端面跳動測量過程中，採用了基於可分性的最大類間方差法和形態學邊緣提取以及基於邊界分割的marr演算法，使圖像分割和邊緣提取的準確性得到了很大的提高；用壓縮矩形的最小二乘法擬合工件端面圖像的邊緣以及用dft變換對工件端面的跳動量進行測量，使端面跳動測量的準確性得到了很大的提高。
  9. The fourth chapter " reseach on fractai structure of stock price " anaiyzed the fractai structure of stock price, deduced the investment function, caiculated the hurst exponent, 3 correlation dimension, and max lyaponov exponent, analyzed the self - similarity, long range dependence, circulation period of stock price and sensitivity of stock price to the initial value, suggested took the exponent characterize fractal instead of variance as instrument to measure risk

    第四章分析並檢驗了股票市場的分形混沌特徵，推導了投資函數，計算了表徵股票市場分形特徵的hurst指數，關聯維和最大lyapunov指數，分析了股票價格的自相似性、長期記憶和循環周期，分析了股票價格的波動對初始條件的敏感性，提出中國股票市場具有混沌分形的特性，用傳統的方差法度量股票風險是無效的，必須使用混沌分析能夠理論來刻畫股票收益的風險，建立收益模型。
  10. 3, game theory analytics has been applied to improve mean - variance method of h. m. markowitz in fields of zero - sum game and non zero - sum game

    3 、運用博弈分析方法對馬克威茨的均值一方差法在零和博弈和非零和博弈的范疇內進行了改進。
  11. Since 1952 the markowitz ’ s mean - variance portfolio theory inception, sur - rounding this issue which how to measure risks, it has generated a lot of risk mea - surement methods and bring a lot of portfolio models, such as mean - semivariancemethods, mean - downside risk methods, mean - absolute deviation methods, mean - absolute semideviation methods, mean - absolute downside risk, and soon. 1999, duarte proposed a portfolio optimization uniform model that unifiedthe six methodologies mentioned above

    自從1952年markowitz的均值-方差投資組合理論問世以來，圍繞著如何對風險進行度量這一問題先後產生了許多的風險度量方法，帶來了很多的投資組合模型，如均值-半方差法、均值-下滑風險方法、均值-絕對離差方法、均值-絕對半離差方法、均值-絕對下滑風險方法等等。
  12. The allan variance ( av ) analysis method is used to evaluate the hrg signal. the result indicates that the main random error of hrg is angle random walk ( arw )

    論文採用allan方差法對半球諧振陀螺的信號進行隨機誤差分析，分析結果表明，半球諧振陀螺的角度隨機遊走誤差是陀螺隨機誤差的主要部分。
  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. Then the research of image enhancement based on of plateau equalization algorithm and genetic algorithm is done then in this chapter. image segmentation with algorithm of 2d - maximal variance between - class and region growing is accepted to eliminate the background and the isolated noise points which can not be the target

    論文在紅外目標檢測方面，以對經過預處理的圖像進行分割為切入點，採用二維類間方差法和局域生長法來進行圖像的分割，消除了原始圖像中一些不可能為目標的孤立噪聲點和大面積的背景區域。
  15. In the first part, we analyze the risk and reasons that a securities corporation in china is facing at present, then develops a securities corporation risk control system based on the realities in china by the ways of advanced qualitative management pattern from oversea. in the second part, we consider the existing situations that market risks became a major problem to a securities corporation, we have a method to measure developed market risk by adopting an advanced quantitative model var which is popular internationally, and we focus on studing risk metrics ( var - covar ) application in securities market of china practically. we conclude that var model is useful and effective at controlling market risks in china by our analysis and test

    第一部分通過對證券公司風險及風險成因的分析，借鑒國外先進管理模式提出了構建符合中國國情的證券公司風險控制體系，對目前我國證券公司主要業務的風險點及風險管理進行闡述，並佐以案例；第二部分針對市場風險日益成為證券公司主要風險的現狀，引入了國際上最廣泛使用的市場風險控制方法? ?風險價值法（ var ） ，從實用角度重點研究了方差協方差法在我國證券市場的應用，通過實證分析得出了在我國使用var控制市場風險是切實可行的結論。
  16. And some optimal design of fir digital filter are researched. such as, linear programming design, least squares design

    同時也研究了一些線性相位fir濾波器的優化設計方法，如最佳一致逼近法、最小均方差法和線性規劃的設計方法。
  17. We present " c - imm extended map - tuned variance method " to combine c - imm and extended map - tuned variance method. simulations show that : the performance of target tracking is improved by using c - imm extend map - tuned variance method when target is on road or junction

    理論分析和模擬表明，基於多模型的「 c - imm擴展地圖調整方差法」對于目標在道路交叉點時，或者目標在道路上勻速運動時，跟蹤性能有所改進。
  18. Via refer to literature and theory study, three methods, namely ent, otsu, and iteration method are putted forward to calculate void fraction and via lots of experiment, three methods are compared and induced. in the end, otsu is recommend which it has satisfactory precision and speed

    經過大量的圖像分割實驗，對各種分割方法的分割效果和適用條件進行了比較和歸納，以計算精度和計算速度作為比較標準，作者認為類間方差法是計算閾值的最佳方法。
  19. The var model could be formulated hi 3 ways : historical stimulation method, variance - covariance approach and monte - carlo simulation

    Var模型的建立有歷史模擬法、方差?協方差法和蒙特卡羅模擬法，本文在j
  20. Aim at the limit of map - tuned variance method, we use directional noise to handle the motion along different road. then, we evolve the general formula to judge whether the target is on road or not, and present " extended map - tuned variance method "

    針對地圖調整方差法的局限性，引入方向性過程噪聲來表徵目標在不同的道路上運動，推導出判斷目標在道路上的一般公式，提出「擴展地圖調整方差法」 。
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