variance-mean ratio 中文意思是什麼

variance-mean ratio 解釋
方差平均值比率
  • 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。
  • mean : vt 1 意,有…的意思,意思是…。2 意指,用…意思說;意味著,就是。3 (用語言、繪畫等)表示意思,表示...
  • ratio : n. (pl. ratios)1. 比,比率,比值;比例;系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達;求出…的比值;使…成比例。2. 將(相片)按比例放大或縮小。
  1. This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance, co - variance and path coefficient analysis, to determine broad - sense heritability, and to estimate genetic advance under selection. the genotypes showed significant difference for all traits, except for percentage of normal seedling. genetic correlation between conversion efficiency of seed reserve, electrical conductivity with other traits were not significant, showed that selection for any of them might be possible without hampering any other traits. however path coefficient analysis indicated that conversion efficiency of seed reserve, seed reserve utilization ratio have strong direct effect in affecting seedling weight, and that mean germination time has significantly negatively correlated in affecting gi. moderate to high estimates of broad - sense heritability, genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity, germination index, mean germination time, seed dry weigh, seedling dry weigh, seed reserve depletion ratio indicating the possibility for improving these traits

    本研究利用12個普通小麥品種對10個種子活力性狀的遺傳變異和相關研究,表明除正常幼苗百分率外,其餘種子活力性狀在品種間均存在顯著的差異.種子貯藏物質轉換效率、電導率兩個性狀間及與其它性狀均無顯著的遺傳相關,因此對他們的選擇不會影響到其它性狀.通徑分析表明幼苗干重主要取決于種子貯藏物質轉換效率、種子貯藏物質利用速率;發芽指數主要由平均發芽時間決定.電導率、發芽勢、幼苗干重、種子干重、發芽指數、種子貯藏物質消耗比率6個性狀表現中到高的遺傳力、遺傳變異系數和相對遺傳進展,指明通過遺傳育種手段改良這些性狀是可能的
  2. With the perspective of risk transferring, this thesis focuses on discussing the reinsurance optimization model under mean - variance principle, utility theory and sharpe ' s ratio, their meanings, basic ideas and conditions applicable. at present, china has been a member of wto

    從原保險人利用再保險轉移風險的目的出發,本文集中討論了均值方差原理、效用原理及夏普比率(風險收益比率)下的再保險最優化模型,三種原理的含義、基本思想及所適用的條件。
  3. 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。
  4. 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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