niche sign 中文意思是什麼

niche sign 解釋
壁龕癥
  • niche : n. 1. 壁龕〈擱雕像、花瓶等的墻壁凹處〉；【地質學；地理學】雪凹。2. （適合個人性格、能力等的）適當地位，活動范圍；【生物學】小生境。3. （市場供求情勢為企業家提拱的）有利可圖的缺口。
  • sign : n 1 記號，符號。2 信號，暗號。3 （示意的）姿勢，手勢；表示。4 招牌，廣告（牌）。5 形跡、痕跡〈常...
  1. Therefore, the optimization of the forward electric quantity of entan hydropower station is mainly studied with the model of optimizing annual forward electric quantity constucted based on the forecasting inflow runoff to reservoir, the model is solved by using niche genetic algorithm and the results can be taken as the basis for the owner to sign the forward market contract

    因此本文重點研究了二灘水電站的年期貨電量的優化問題，建立了年期貨電量優化模型，以基於徑流趨勢預測方法選用的入庫徑流量為依據，用小生境遺傳演算法對模型進行求解，計算結果可作為該公司簽訂期貨合同的依據。
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