step-variable cost 中文意思是什麼

step-variable cost 解釋
階梯式變動成本
  • step : vi ( pp )1 走;跨步。2 踩,踏上 (on)。3 跳舞,輕快地走,合著步調走。4 跨入,踏進。5 走上。vt ...
  • variable : adj 1 易變的,變化無常的,無定的 (opp constant steady)。2 可變的,能變的;變換的。3 【數學】變...
  • cost : n 1 費用;代價,價格;成本。2 犧牲;損害,損失。3 〈pl 〉訟費。vt (cost; cost)1 值,要價(苦幹...
  1. Optimal periodic control with the lowest operational cost by limiting total substrate discharge mass was studied. through adding new state variable and using supplement functions, the problem with restriction conditions was converted into nonrestriction problem. in addition, the dynamic searching method of optimal step coefficient was developed to modify the conventional gradient method, consequently the calculation problem of the multivariable optimal periodic control was able to be resolved better. it was found that the operational costs of optimal control under various initial states are distinctly different. a new concept of optimal control under optimal initial state was presented. it is pointed out emphatically that to the treatment system without optimal control condition, the suboptimal control with extensive practical value can be realized according to the results of optima control

    著重研究了在限制有機物排放總量時,使其運行費用最低的最優周期控制問題.通過增加新的狀態變量和用補償函數法,將本課題的有約束條件問題化為無約束條件問題,並提出了最優步長參數的動態搜索法來修改傳統的梯度法,從而較完善地解決了多變量最優周期控制的計算問題.研究中還發現了不同初始條件下最優控制所需要的運行費用也大不相同,進而提出了最優初始狀態下最優周期控制的新概念,這對保證出水質量的同時進一步降低污水處理成本來說具有更重要的意義.本文還強調指出:對于尚不具備實現最優控制條件的處理系統,可根據最優控制的研究結果實現具有廣泛實用價值的準最優控制
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