volume variance 中文意思是什麼

volume variance 解釋
產量差異
  • volume : n. 1. 卷，冊；書籍；【歷史】書卷，卷軸。2. 〈常 pl. 〉大塊，大量，許多。3. 體積；容積；分量，額；【物、樂】音量；強度，響度。
  • 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。
  1. In addition, super - short term strategies also earn significantly positive returns. nevertheless the contrarian strategies under long formation horizons and holding horizons ( beyond 36 weeks ) may yield significantly positive returns. we also find, considering markert factor ( market return, cross - sectional variance of equity returns ) and characteristic of individual stock ( trading volume, firm size, price, price / earnings, be / me ), there exist clearer and more significant patterns of profitability in momentum or contrarian strategies

    具體而言，大體上以中短持有期的慣性策略（持有期4 ? 24周）有較顯著之利潤，超短期形成期的慣性策略在1 ? 12周的獲利性亦很顯著，而較長形成期（ 36周以上）與較長持有期搭配的反向策略則可能獲得顯著的正收益。
  2. Based on the port and waterway superintendence units, we study and screen the detailed method for the sample survey of whole industry waterway transportation volume, including selecting detailed sampling method, determining the appropriate sampling size, designing the calculation formula of all target estimators and their variance estimation

    包括選定具體的抽樣方法，確定合適的樣本量，給出需估計目標量的估計公式及估計量的精度公式，制定詳細的樣本調查規定和編制科學合理的樣本調查表等。
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