方差面 的英文怎麼說
中文拼音 [fāngchāmiàn]
方差面
英文
variance surface-
The thesis, somehow, is a summary, which expounds the main contents of traditional portfolio theory ( tpt ) and mpt, also gives a comparison between tpt and mpt ; analyses two aspects of markowitz theory, one is the effects of risk disperses and the demonstration, the other is how to make an optimal portfolio strategy ; researches into capital assets pricing model ( capm ), factor model ( fm ) and arbitrage pricing theory ( apt ) respectively in three parts ; studies another two parts, one is the premise of mpt, which is the efficient market hypothesis ( emh ), the other analyses the behavior finance theory ( bft ) produced in the background of challenging and querying to emt and capm. the thesis finally discusses the researching and applying prospects of mpt in china
論文對現代資產組合理論與傳統資產組合理論分別進行了分析，並對兩者進行了比較研究，對馬克維茨的均值? ?方差理論從資產組合風險分散效應和最優資產組合選擇兩方面進行了重點分析，對資本資產定價模型、因素模型、套利定價理論進行了一定深度的分析和研究，對現代資產組合理論的前提假設? ?有效市場理論及在對有效市場理論和資本資產定價模型形成挑戰和質疑背景下提出的行為金融理論進行了論述，論文最後分析了現代資產組合理論在我國的研究及其應用的廣闊前景。On the other hand, the moment, the second moment and variance of the present value random variables about some life annuities and annuities with random interest rate are gotten
另一方面討論了隨機利率下的一些離散年金、連續年金和連續生存年金現值隨機變量的一階和二階原點矩及其方差。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。On the one hand, the author discusses markowitz ' s mean - variance portfolio selection model, single - index portfolio selection model, and simplified model of optimal portfolio selection. at the same time, based on the rules of optimal portfolio selection and other risk - metric indices, the author also discusses mean - absolute deviation model, mean - semivariance model and mean - value at risk model. on the other hand, the author discusses the asset pricing model, including the capital asset pricing model ( capm ), the multi - factor asset pricing model, and the arbitrage pricing model ( apt )
一方面，作者討論了馬科維茲的均值-方差資產組合選擇模型、單指數資產組合選擇模型、最優資產組合選擇的簡化模型，同時根據最優資產組合選擇原則和其他風險度量指標，討論了均值-絕對離差、均值-半方差和均值-風險價值資產組合選擇模型；另一方面，作者討論了資產定價模型，包括多因素資產定價模型和套利定價模型，特別是在四種因素變量的基礎上，探討多因素資產定價模型。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。( 5 ) parameterization of infrared satellite cloud imagery and its application in rainfall predication obvious correlation exist between the probability of rain and parameterization estimate such as average brightness temperature ( tb ), brightness temperature variance ( f ), equivalent cloudage ( cn ), brightness temperature area index ( al - the first a5 - the fifth grade, a6 - the sixth grade )
（ 5 ）衛星雲圖參數化及在降雨預測中的應用紅外衛星雲圖參數化估計值，與局地降雨過程的發生、發展具有較為密切的關系。相關較密切的參數有平均亮溫、亮溫方差、等效雲量、亮溫面積指數（ 1級、 5級、 6級） 。The manufacturability includes many aspects, such as geometry structure of parts, the rationality of the tolerance specification, fixturability and the assemblability etc. in the research, the main research topics are focused on the following aspects : the study on the incremental evaluation approach during the detailed design process, the study on the entireness evaluation after the design has completed and the study on the fixturability evaluation of the machined parts for modular fixture
本文的研究內容主要涉及以下幾個方面：詳細設計過程中的可製造性逐步評價方法、基於簡化加工工藝規劃的整體可製造性評價方法、面向組合夾具的零件可裝夾性評價方法等。在本研究中，零件的設計方案以b _ rep實體模型表示，零件的公差和表面質量以實體模型中各個相關面的屬性表示。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。Variance index of the settlements of soft clay subgrade was inducted to analyze the asymmetry settlement rules under the influence of depth of fill, fill speed, geologic types of soft clay etc
利用這些觀測數據，引入路堤斷面中點和兩側坡腳地基表面3點沉降的方差這一統計學指標，詳細分析了地質結構，填築速率、填築高度以及硬殼層等因素對軟基不均勻沉降的影響，得到了一些有意義的結論。Based on the classification of images, this paper gives out four digital image steganography techniques which have good conceal effect, including low - three - bits hiding strategy, odd - even of hypo - low bit hiding strategy, deviation of adjacent - field hiding strategy and self - adaptive deviation of adjacent - field hiding strategy. on digital watermarking aspect, this paper gives two blind watermarking strategies which have good conceal effect and high robustness, they are single - watermarking strategy based on minimal - value exchanging and multi - watermarking strategy which hides the same watermark copy on the different parts of an image
在對圖像進行了分類的基礎上，本文給出了四個具有較好掩密效果的數字圖像隱寫策略，包括低三位隱藏策略、次低位奇偶策略、鄰域方差策略和自適應鄰域方差策略；在數字水印方面，提出兩個掩密效果好且魯棒性較高的數字圖像盲水印策略，分別為基於最小值交換法的單一水印策略和嵌入同一水印多個副本的多水印策略。First, proper initial conditions between ekv and target are the premise of hit - to - kill. capture region is described by equations of relative motion defined in modified polar coordinate while phasetrajectory graph is introduced. and the disturbance of initial condition biase is analyzed by cadet through statistical linearization of ekv dynamical model
本文在修正極點坐標系中建立攔截器和目標之間的相對運動方程，結合相平面軌跡圖，分析了大氣層外動能攔截器的攔截區;對大氣層外動能攔截器動力學模型進行統計線性化，採用協方差分析描述函數法，分析了初始狀態誤差對彈道的影響。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。When analyzing the principle and performance of the lsdll, circular flowgraph is used. the expression for " penalty " time and mean and variance of the acquisition time is derived from the circular flowgraph of large step acquisition method
在理論方面，本文利用圓形狀態圖對大步進快速捕獲法的工作原理進行研究和分析，導出由相關處理時間、大步進時間、虛警概率、檢測概率和虛警「代價」時間表示的捕獲時間平均值及其方差的表達式。During the course of the research, the criterions of the interpolation effect are mean error ( me ), mean absolute error ( mae ), root mean squared interpolation error ( rmse ) and the difference of mean square deviation between the measured and the estimated surface air temperature. the conclusions are as follows : ( 1 ) by contrasting the gaussian weighted model associated with the error modification with the gaussian weighted model, the error modification is proved to considerably ameliorate the precision of spatial interpolation ; ( 2 ) on the base of the gaussian weighted model, taking altitudinal effect into account can reflect the trend in which temperature changes according to the topographic altitude and may ameliorate the precision of spatial interpolation correspondingly and apparently, which indicates that topographical effect on the preciseness of spatial interpolation can not be disregarded in terms of the region with complicated topography ; ( 3 ) the map of daily surface air temperature distribution, using the modified gaussian weighted model a and b, can accurately reflect the temperature - changing - with - topographical - altitude trend. among them, the better is the model a, whose me is below 0. 03 ?
在此過程中，採用平均誤差（ me ） ，平均絕對誤差（ mae ） ，插值平均誤差平方的平方根（ rootmeansquaredinterpolationerror ，簡稱rmsie ） ，插值前後測站要素值的均方差（ meansquaredeviation ，簡稱msd ）差值作為判定插值效果的標準，得出如下結論：通過高斯權重法與結合逐步訂正的高斯權重法的對比，說明結合逐步訂正方案的高斯權重法可大大提高地面日氣溫的插值精度；在高斯權重法中加入海拔影響項可以反映出溫度隨地形高度的變化趨勢，同時也能較大地提高地面日氣溫的空間插值精度，說明在地形復雜的區域，地形影響在插值精度中是不可忽略的；對于高斯權重法的兩種改進方案得到的地面日氣溫分布圖都能很好地反映出表面大氣氣溫隨地形高度的變化趨勢。As to the work about experiment study, at first, the paper makes certain the prominent affecting factors to the automating and humidifying property of this kind of nozzle by orthogonal experiment. by jicha analysis method and fangcha analysis method, the paper got that the nozzle aperture, the initial water temperature and the spraying pressure have prominent effect to the humidifying property while the effect of the original air state is small
試驗工作方面，首先通過正交試驗確定對撞針型高壓小孔徑離心式噴嘴霧化加濕性能影響顯著的因素，運用極差分析法和方差分析法，得到噴嘴孔徑、噴水初溫和噴水壓力對噴嘴的加濕性能影響顯著，而待加濕空氣初狀態的影響相對較小。( 2 ). according to the system indices and requirements together with the technology characteristic, it researches the capture possibility of apt capturing system. then it introduces the common scan methods, such as raster, spiral, raster spiral, rose and lissajo. ( 3 ). it makes a detailed simulation analysis of the raster and spiral scan, analyze the connection between capture probability, capture time, system index at different capture resolution angle, capture range, vibration angle extent and terminal location distributing mean square deviation
其中對幾個關鍵部分進行了詳細分析:計算了目標角反射器的激光雷達散射截面（ lrcs ）值，研究了qd與ccd對目標位置角度的計算方法和空間解析度; （ 2 ）根據系統指標和要求並結合現有國內技術特點研究了apt捕獲系統掃描的捕獲概率問題，然後分析了幾種常見的掃描方式:矩形（ raster ）掃描、螺旋（ spiral ）掃描，矩形螺旋（ rasterspiral ）掃描，玫瑰形（ rose ）掃描以及李薩如形（ lissajo ）掃描; （ 3 ）對分行掃描和螺旋掃描進行了詳細的模擬分析，分析了它們在不同捕獲分辨角、捕獲范圍、振動角振幅和終端位置分佈均方差時的捕獲概率、捕獲時間與系統常數之間的關系。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。The statistic of wavelet transform coefficient algorithm can solve the periodic noise, high - energy noise and some non - gauss noise simply and effectively ; bi - spectrum can acquire more information from the original signal than power - spectrum, detect more information except from range and restrain the gauss noise. short - time speech signal can be considered as stationary and with periodic non - gauss signal, so we can make use of bi - spectrum to obtain the speech character and separate the speech and noise and detect morse telegraph signal ; complex number spectrum variance algorithm is put forward based on the deeply observing speech data, it is a new algorithm, experiment show that it is simple, effective
統計演算法在解決周期信號、高能噪聲和高斯信號方面有獨特之處，能簡單有效提取以上噪聲的特徵;雙譜能夠提供比功率譜更多的有用信息，有效地檢測信號幅度之外的其它信息，並能有效抑制高斯噪聲，短時語音信號一般認為是平穩且有一定的周期性的非高斯信號，因而可以利用雙譜來提取語音信號特性並實現信噪分離;復數譜方差演算法是在對語音信號進行深入觀察和分析的基礎上而提出來的一種全新的語音特徵提取方法，此方法簡單而有效的提取了語音、噪聲的特徵以及檢測莫爾斯信號，基於實驗表明，該演算法取得了很好的效果。The mathematic model of the ultra - thin spherical mirror is to be treated as elastic thin shell. then the predigested model, i. e., bended beam, used in qualitative analysis was proposed, and its deflection and stress formulas under the freely supported condition were set up. based on an off - axis aspherical primary mirror, the relationship of aspherical surface error ( rms ) in tangential plane with bended beam ’ s radius r, position s of concentrated load p and geometry length l of arc was analyzed
根據這一設想，本文建立了超薄鏡的數學模型?薄殼，並提出了強制力作用下超薄鏡的簡化模型?曲梁，推導了曲梁在簡支情況下受力變形的撓度公式，並結合一個實例，計算出曲梁變形后與所需非球面的面形殘差（ rms ）在子午方向與曲梁弧長l 、曲梁半徑r及集中力位置s的關系及滿足面形精度的r和s范圍，分析了弧矢方向的rms ，得出了同時滿足子午和弧矢方向面形要求的l 、 r和p 。We empirically test the return serial correlation of shanghai stock market under the vr ( variance ratio ) test framework. we suggest that the test results of index and individual stocks are consistent with the exist results. the index return is positive serial correlation and individual stocks returns are weakly negative serial correlation
2 .我們使用高頻交易數據，在方差比檢驗的框架下檢驗了上海證券市場收益率的序列相關性，我們發現在市場指數和個股樣本方面的檢驗結果與以往的研究結果存在一致性，即指數收益率存在正序列相關性，而個股收益率存在弱負序列相關性。分享友人