variance method 中文意思是什麼

variance method 解釋
方差法
  • variance : n. 1. 變化，變動，變更；變度，變量；【統計】（平）方（偏）差。2. （意見等的）相異；不和，沖突，爭論。3. 【法律】訴狀和供詞的不符。
  • 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. 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。
  2. The method proposed in this thesis do well in solving the problems of multi - damping - ratio - spectra simulation. it is convenient to obtain the pareto optimal solution set of the multi - object question by using implicit parallel genetic algorithms and the method can meet the practical needs for simulating ground motions coinciding with multi - damping - ratio - spectra in seismic design. the crossing rate and variance rate are important parameters of genetic algorithms which affect the rate of convergence, the adapting rate of cross and variation in this paper can auto - adapt and according to stand or fall of current sample, it assures the sample approach to the pareto optimal solution set in fast convergent speed

    較好地解決多阻尼比反應譜擬合問題；本文方法通過一次運行就能獲得一組具有集系特性的地震動，在擬合多阻尼比反應譜的人造地震波集系的模擬方面有傳統方法所不能比擬的優勢，產生的人造波或人造波集系可滿足工程抗震設計需要；在遺傳演算法中，交叉概率和變異概率是影響收斂速度的重要參數，本文採用的改進自適應交叉概率和變異概率，可以根據當前樣本的好壞程度來自動地選擇適當的交叉概率和變異概率，以保證演算法始終以較好的速度向pareto最優解集逼近。
  3. 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。
  4. The mathematical statistics method and extrema variance clustering method can be used to visible automatic classifying and reading of logging curves. the lithofacies classifying program basing on multi - mineral model analysis presents a new method to analyze logging - facies and more accuracy and visualized logging facies section can be reached by using this method. in addition, it supplies reliable lithologic layering reference for search and evaluation of oil / gas caprock and it also made up for the high cost of core - drilling and the inaccuration between lithic fragment description and depth

    採用基於「數理統計-極值方差聚類法」的面向對象可視化操作方法可有效地解決測井曲線的可視化自動分層取值問題；而基於多礦物模型分析的巖相劃分程序又提供了一種新的測井相分析方法，能得到更為準確直觀的測井相剖面，為尋找和評價油氣蓋層提供了可靠的巖性分層依據，同時彌補了鉆井取心費用高和錄井巖屑描述與深度有誤差的缺陷。
  5. Theory of portfolio optimization is an important part of the modern ? nance in - vestment theories, which uses mathematical facilities such as convex analysis, random analysis, nonsmooth analysis, ( nonlinear ) programming etc, combined with the mean - variance method the basic method of modern portfolio theory. by setting up mathe - matical models, discussed the investment rules of ? nance market and o ? ered theoretic guide for investors

    投資組合優化理論是現代金融投資理論的重要組成部分，它運用凸分析、隨機分析、非光滑優化、 （非）線性規劃等數學工具，並與現代投資組合理論的基本方法均值方差方法相結合，通過建立數學模型討論金融市場投資規律並為個人或機構投資者提供理論指導。
  6. 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。
  7. Some normalization methods are discussed in detail, including histogram method, expectation - variance method and trend surface analysis

    這里詳細介紹了各種測井數據標準化的方法原理，並給出了相應的實例。
  8. In this paper, optic gyro is viewed as the object of investigation and several aspects is investigated as follows. two important indexes - bias instability and scale factor were measured and investigated, including bias, its repetitiveness, temperature sensitivity, random walk coefficient and scale factor, its nonlinearity, asymmetry, repetitiveness. we make use of the allan variance method to separate the noise factors which affect the performance of the optic gyro, such as the angle random walk, bias instability, rate random walk, rate ramp, quantization noise, markov noise and sinusoidal noise

    本文以光學陀螺為研究對象，開展了以下幾方面的研究工作：本文對光學陀螺性能的兩個重要指標?標度因數和零偏穩定性進行了較為詳細的研究，其中包括陀螺的零偏b _ 0 、零偏重復性b _ r 、零偏溫度靈敏度b _ t 、隨機遊走系數rwc和標度因數k 、標度因數的非線性k _ n 、標度因數不對稱性k _ h 、標度因數重復性k _ r等等。
  9. Secondly, this paper mainly put forward different grey level threshold value segmentations of plane target after brief analyse the smooth and sharp image of image strengthen technology, segmentation for the overall situation, adopt the maximum variance method, the maximum entropy combine with adaptive threshold selection method, the maximum variance ration between two classes and in two classes ; segmentation for the part situation, has adopted the adaptive threshold value method ; to background more complicated segmentation, have adopted the two - dimentional maximum entropy method

    其次，在簡要的分析了圖像平滑和銳化的圖像增強技術后，重點研究了飛機目標的灰度分割，提出不同的灰度閾值分割方法進行圖像分割，對于全局分割，採用了最大類間分割法、最大熵與一致性準則相結合法、最大類間類內方差比法;對于局部分割，採用了自適應閾值法;對于背景較復雜的分割，採用了二維最大熵法。
  10. Secondly, a ship undocking process environmental forces testing plan is made by using the orthogonal design theory. measuring the environmental forces with different wind, wave and current combination from 0 ? to 90 ? and analyzing and processing the data are finished by using the analysis of variance method. comparing the experimental results with the results calculated using the ocimf method, the reliability of using the ocimf method is testified

    二、利用正交設計方法，制定了船舶出塢過程環境載荷測量方案，完成了船舶在出塢過程中從90到0過程中在不同風、浪、流組合下的環境外力測試和分析處理，利用級差分析方法，重點分析了風、浪、流以及方向對船舶出塢的影響程度大小，並把試驗結果和ocimf方法計算結果作了比較分析，驗證了ocimf方法計算結果的可靠性。
  11. 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。
  12. Many risk measuring techniques appears, such as variance method, p analysis method, duration method. these techniques only can be applied into given financial tools or specific field

    在西方，許多風險衡量技術，如標準差、系數、持續期和delta等方法都應運而生，但這些技術都只能適應特定的金融工具或在特定的范圍內使用，難以綜合反映風險承擔情況。
  13. The study chooses foodstuff industry, textile industry, drug products industry, transportation industry, information technology industry and estate industry ( there are totally 283 listed companies in these six kind of industries ), based on the financing data of the year of 2001. firstly, utilizing the one - way analysis of variance method to analyze if trade factor influence capital structure

    本課題選取食品飲料業、紡織服裝業、醫藥生物製品業、交通運輸業、信息技術業和房地產業六類共283家上市公司，以其2001年年報數據為依據，首先利用單因素方差分析方法檢驗不同行業的上市公司資本結構是否存在顯著差異。
  14. The methods to achieve the optimal allocation of fixed income securities include the target - penalty method and mean - variance method

    固定收益證券最優化的方法包括目標罰金方法和均方差方法等兩種方法。
  15. 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。
  16. 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」 。
  17. In this paper, according to the spermatozoa microscopic image characteristics four conventional image segmentation algorithms are compared. and at last the maximum between - class variance method is determined to be the best segmentation algorithm to the special images

    針對精子顯微圖像的特點，論文分析比較了四種現存的圖像分割演算法的特點，進而判定：基於灰度直方圖的最大類間方差閾值選取法是最適合不同背景光強和樣本密度的分割方法。
  18. The focusing evaluation functions are tested in detail in this dissertation. the experiments indicated that using variance method could attain good stability, insensitivity to noise and good regulation effect

    論文重點分析了自動對焦評價函數的性能，最後選擇了性能相對良好的方差評價函數作為清晰度的評價方法。
  19. Theory analyzing and simulations show that : when target is on road, on road - junction, or on the transition from on - road to off - road ( from off - road to on - road ), the performance of tracking algorithm using extended map - tuned variance method is improved obviously

    理論分析和模擬研究表明，當目標在道路上或者道路交叉點，或者目標從道路到道路外及從道路外到道路上的過渡過程時，目標跟蹤性能得到改善。
  20. Developed a new method for selecting optimal segmentation scale : mean variance method. from the graph many classes " optimal segmentation scales could be got. it proved that for different classes their optimal segmentation scale are different

    後者是針對於一種地物類別而言的，影像對象多邊形既不能太破碎，也不能邊界模糊的分割尺度，該尺度下對象大小與特定的地物目標大小接近，且類別內部對象的光譜變異較小。
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