variance of mean 中文意思是什麼
variance of mean
解釋
平均方差-
We will show that not any mean of the revenue rates of the industrial indexes is significantly beyond value zero at confident level 0. 90. moreover the mean of the revenue rate of sse 30 index is negative ( though not significant ). and the fact of " the heritage of variance " appears congruous to the feature of industries represented by the corresponding indexes
第二章，通過分析上海股市各分類指數的收益率序列的特徵，得出結論如下：各序列都非正態，有自相關性和異方差存在，相對適宜用garch （ 1 ， 1 ）來擬合；除了上證商業（ 1b0002 ） ，各分類指數收益率的均值在85的置信度下都不顯著地異於0 ，而上證30 （ 1b0007 ）的收益率竟小於0 ；在各分類指數中， 」波動繼承性」的結果和各分類指數對應行業的特徵是相關的。 -
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。 -
Then discusses its properties, such as biased property, relative efficiency of generalized variance and superiority comparisons between generalized ridge estimation and generalized least squares estimation. shows iterative algorithm based on the mean dispersion error
該估計雖然具有偏崎，但其估計精度具有良好的性質，如：有偏性、方差一致最優性、相對于廣義最小二乘估計的廣義方差效率、 mde ? ?有效性等。 -
Besides, this paper adopts the random finite element method, uses geometric and physical mechanical parameters that are relevant to lining weight of surrounding rock, coefficient of lateral pressure, height or buried depth of vertical loading, elastic resistance coefficients of surrounding rock, elastic modulus of support structure, unit weight of concrete, thickness of the structure as well as torsional strength and compression strength of concrete and etc., as random variables, applies the monte - carlo method to sampling by computer, preliminarily evaluates the reliability of bearing capacity and stability of molded concrete lining of the xuefeng mountain tunnel, and obtains the related displacement of the lining, mean value and variance of internal force, and computed the reliability index of lining structures
此外，本文採用隨機有限元方法，將圍巖容重、側壓力系數、垂直荷載高度或埋深、圍巖的彈性抗力系數、支護結構的彈性模量、混凝土容重、結構的厚度以及混凝土的抗扭與抗壓強度等與襯砌結構有關的幾何與物理力學參數作為隨機變量，應用蒙特卡洛理論進行計算機隨機取樣，對雪峰山隧道模注混凝土襯砌的承載力與穩定性的可靠度進行了初步評估，得出了襯砌的相關位移與內力的均值和方差，並計算出了相應的襯砌結構可靠指標。 -
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。 -
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。 -
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。 -
The third part : according to the verified structural damage identification method and supposing the to - be identified parameters to be independent and have normal distribution, the scheme of identifying bridge structure damage is proposed by using the probability damage identification method. assume the zero - order, the first - order and the second - order perturbation statistics of the frequencies and the mode shapes of the bridge structures are known, and substitute them into the statistics property formulas of the frequencies and the mode shapes, as a result an objective function including the mean values and the variance of all the identified parameters is established. set
對于連續梁橋，當損傷位置位於跨中附近時，大多數無損傷單元的損傷概率均在10 %左右，可作為小概率事件，不發生損傷，但與損傷單元相鄰的無損傷單元，其損傷概率達到20 %以上，很難被排除，只有對這些單元進行二次識別，才能得到比較可靠的計算結果;如果損傷位於支點附近時，則不會出現上述情況，對于無損傷單元，損傷概率都小於10 % ，不發生損傷，損傷識別結果 -
The simulation results prove that the proposed dbrd strategy is superior to other two strategies on the mean and variance of cycle time, work in process and throughput
實例驗證表明，該演算法相對于其他兩種派工策略，在產能、加工周期、方差和製品數量等4個指標上均有所改善。 -
Based on the about 50 years development of mean - variance portfolio theory, this paper analyzes and discusses the relationship between return and risk of portfolios by using theoretical analysis and empirical study
本文以五十年來均值-方差資產組合理論的演進和發展為線索，採用理論分析和實證研究的方法，分析和探討資產組合的收益-風險關系。 -
( 2 ) the response characteristics of wind - induced vibration under uncertain parameters were analyzed, which suggested a simplified method for evaluating mean and standard variance of acceleration responses. compared with the results given by a form and fosm method, the suggested methods can give a more precise estimation
（ 2 ）研究了隨機參數作用下的結構風振均方根加速度響應的分佈規律，給出了直接估計均方根加速度響應均值和方差的解析表達式。 -
Application of statistical. estimation of mean known variance
統計學應用.平均值的計算已知方差 -
The market possesses prior information about the mean and variance of the value of the risky asset, as well as the crosscorrelation between the public and private information
在模型中，假設市場揭露了標的風險資產真實價值事前的平均數與變異數，以及公開與私有訊息之間的共變數等訊息。 -
Markowits e - v model is founded on two assumptions : risk averting and none satisfaction. mean of return ratio and variance of return ratio are the two indexes used in the model
單指數模型是假定每一種證券的收益（或多或少的）與一個指數水平相關而建立起來的收益與這種指數的線性關系。 -
Application of mean - variance utility function under the portfolio selection decision
方差效用函數在證券組合投資決策中的應用 -
Improving methods to calculate estimator minimum variance of the finite population mean
總體均值估計量最小方差的改進 -
Modified models of mean - variance portfolio model
證券組合模型的修正模型 -
Traditional research has put much effort on finding the unbiased and less - constricted parameters of mean - variance ( m - v ) portfolio theory. on one hand mean - variance is perfect in its mathematic sense
本論文主要目的是利用再抽樣方法改進傳統均值-方差模型，以使其得到更大的實際應用。 -
In order to improve accuracy of time delay estimation and reduce the variance, a combination method of mean filter and median filter ( bm ) is investigated, and its performance is also analyzed. 5
為有效濾除時延野值和時延估計的隨機噪聲，減小時延估計方差，研究了一種中值濾波和均值濾波相結合的時延值濾波方法?中均值（ bm ）濾波器，並分析了這種濾波器的性能。 -
This paper finds out the mean value and variance of load sequence in a period of time based on statistics and then works out the bias ratio of every point in load sequence using corresponding calculation formula and at the same time compares it with threshold value so that " unhealthy data " can be removed and accurate and effective load forecasting can be ensured
本文利用統計學的方法，求出某段時間內負荷序列中的均值與方差，再利用偏離率的計算公式計算出負荷序列中每一點的偏離率，並與閾值相比較，從而除去「不良數據」 ，為準確有效地進行負荷預測提供了保證。
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