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variation coefficient是什麼意思,variation coefficient的意思翻譯、用法、同義詞、例句

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常用詞典

  • 變異系數,變差系數

  • 例句

  • According to limit state of reduced safety factor, we can compute critical failure probability and variation coefficient corressponding different most likely safety factors.

    根據折減後安全系數的極限狀态,可計算出不同最大可能安全系數的臨界變異系數和臨界破壞概率。

  • The model uses the variation coefficient as parameter, which reflects eigenvalue difference to represent the weight of evaluation indexes, decreases the subjectivity of weight decision.

    該模型采用反映評價指标特征值之間的差異性的參數變異系數作為評價指标的權重,減少了權重确定的主觀性。

  • Suppose that critical value of reduced safety factor is 1.05, critical failure probability and variation coefficient corressponding different most likely safety factors can be calculated.

    設折減後安全系數的臨界值為1.05,由此計算出不同最大可能安全系數的臨界變異系數和臨界破壞概率。

  • Methods:Orthogonal experiment was arranged to screen the optimization formulation of suspending'reagent to variation coefficient in the rate of indicators.

    方法:采用正交試驗安排試驗,以變異系數為指标進行細胞懸浮劑最優配方的篩選。

  • The research shows that influence of sample variation coefficient on estimated accuracy should be considered.

    研究表明,應考慮樣本變差系數對估計精度的影響。

  • The method measuring the ovary weight of tat for detecting the bioactivity of HCG results lower variation coefficient and greater reliability.

    美英日三國藥典規定使用的大鼠卵巢增重法組内組間變異系數最小,測定結果可靠性最大;

  • Quantity genetic analysis showed that genetic variation coefficient, performative variation coefficient and hereditary ability of growth properties were greater than physiological properties.

    數量遺傳分析表明,各生長指标的遺傳變異系數、表型變異系數和廣義遺傳力一般均大于生理指标;

  • To overcome the shortcomings of the methods to subjectively or objectively determine the weight of indexes, the group eigenvalue method combining with the variation coefficient m.

    為解決用主觀賦權法和客觀賦權法确定指标權重存在的問題,采用群組決策特征根法和變異系數法相結合的方法。

  • The standard deviation, range, variation coefficient, 95% confidence interval were analyzed, the average values of 3 cycles were compared with those of 5 cycles.

    計算各組變異系數、标準差、極差、均數95%可信區間,比較連續3個心動周期與5個心動周期的參數測量值。

  • This paper first measures interregional disparity in financial capacity by variation coefficient weighted by population.

    首先采用以人口為權數的加權變異系數對地區間財力差異進行了度量。

  • The paper stu***d stable seepage flow rule of overpressure reservoir and created the method for using systematic well testing data to compute permeability variation coefficient.

    本文研究了異常高壓油藏穩定滲流規律,建立了利用系統試井資料求取滲透率變化系數的方法。

  • The optimum design example shows that the variation coefficient of load torque acting on cutting head is decreased 13.

    優化設計實例表明,截割頭的負載轉矩變差系數減小了13。

  • The relationship is derived in this article between the weighted average of length variation coefficient and the distribution function of the cross-section area of fibre bundle.

    本文推導了按重量加權的長度變異系數與纖維束截面積分布函數之間的關系。

  • Results The whole blood controlling product has long term stability, and the value of variation coefficient is less than 5% .

    結果全血質控物具有較長的穩定期,且變異系數值小于5%。

  • Based on the standard deviation and variation coefficient, soil water change in the profile could be divided into four layers by cluster analysis.

    基于标準差和變異系數兩個指标,采用聚類分析,可将土壤剖面水分垂直變化劃分為四個層次:速變層、活躍層、次活躍層和相對穩定層。

  • The variation coefficient of total nitrogen(17%) was the smallest and more stable.

    總氮的變異系數(17%)最小,比較穩定;

  • It is found that the central design coefficient is a decreasing function of the variation coefficient of vertical consolidation coefficient and is an increasing function of probability of failure.

    中心設計系數是豎向固結系數變異系數的減函數,而是失效概率的增函數。

  • The results show that the test site has a very good homogeneity with a variation coefficient of the reflectance in any channel lower than 3%.

    地表反射率和大氣光學特性地面同步測量結果顯示:敦煌場地的地面均勻性好,各個通道反射率的變化系數(即相對變化百分比)均小于3%。

  • Based on 5% of statistics there are no apparent relationships between equity capital cost, average capital cost, standard variation coefficient of EBIT and degree of financial leverage.

    在5%的統計學水平上,權益資本成本、平均資本成本、息稅前收益率的标準離差率和財務杠杆系數四者之間無明顯的相關性。

  • The main factors influencing cycle injection outcome are the permeability variation coefficient and connectivity degree between layers.

    影響周期注水效果的主要因素是滲透率變異因數和層間連通程度;

  • This method has better accuracy, and its variation coefficient is 6.0 %.

    該方法有較好的精密度,變動系數為6.0%。

  • 同義詞

  • |coefficient of deviation;變異系數,變差系數

  • 專業解析

    變異系數(Coefficient of Variation, CV)是統計學中衡量數據相對離散程度的重要指标。它定義為标準差(σ)與算術平均數(μ)的比值,通常以百分比形式表示。其核心價值在于比較不同單位或量綱數據集的離散程度,或比較均值差異較大數據集的波動性。

    計算公式如下: $$ CV = frac{sigma}{mu} times 100% $$ 其中:

    核心意義與應用場景:

    1. 消除量綱影響,實現跨數據集可比性:标準差受數據單位(如米、千克、元)和均值大小影響,無法直接比較不同量綱或均值差異大的數據集的離散程度。變異系數作為相對值(百分比),有效克服了這一局限。例如,比較不同生産線産品重量的波動性(單位:克 vs. 千克),或比較投資回報率(低均值 vs. 高均值)的風險。
    2. 評估風險與穩定性:在金融領域,變異系數常用于衡量投資項目的相對風險。CV值越高,表明單位收益所承擔的風險越大,投資穩定性越差。在質量控制中,CV值小代表生産過程穩定,産品質量波動小。
    3. 模型精度評估:在預測模型(如機器學習、計量經濟學)中,變異系數可用于評估預測值相對于實際觀測值的相對誤差大小。

    重要注意事項:

    權威參考來源:

    網絡擴展資料

    “Variation coefficient”(變異系數)是統計學中用于衡量數據離散程度的相對指标,其核心定義和相關信息如下:

    1.基本定義

    2.計算公式

    變異系數的數學表達式為: $$ CV = frac{sigma}{mu} times 100% $$ 其中:

    3.應用場景

    4.注意事項

    5.相關術語

    如需進一步了解具體領域中的應用案例,可參考統計學教材或專業文獻。

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