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最優(yōu)化—簡(jiǎn)化了的目標函救

來(lái)源: 時(shí)間:2013-12-13 09:25:01 瀏覽次數:

研究高溫高壓反應釜最優(yōu)化的一般目的,是使過(guò)程的收益最大或過(guò)程的成本最低。這種做法很不全面,因為,收益或成本的傳統定義,遠遠不能代表工業(yè)過(guò)程對社會(huì )所產(chǎn)生的全部影響,很多重要的因素,在這種分析方法中被忽路了。
研究高溫高壓反應釜化的一般目的,是使過(guò)程的收益或過(guò)程的成本。這種做法很不,因為,收益或成本的傳統定義,遠遠不能代表工業(yè)過(guò)程對社會(huì )所產(chǎn)生的全部影響,很多重要的因素,在這種分析方法中被忽路了。
可是,那些化的研究者經(jīng)常會(huì )遭到相反立場(chǎng)的指貴,這決不是認為這種研究的“成本觀(guān)點(diǎn)”太多,而是還不夠。如果設法以錢(qián)幣計算來(lái)建立過(guò)程的模擬模型,代之以實(shí)際過(guò)程,并用某些非經(jīng)濟性的變量,例如反應的收率(它僅部分她具有經(jīng)濟意義)來(lái)表達,這樣的研究就會(huì )更令人滿(mǎn)意些。
顯然,兩種判別型式都遇到同樣的基本困難,這就是在求取化時(shí),要求所有參數都能定量地予以表示,為此,通常藉要對實(shí)際情況作出很大的簡(jiǎn)化,這就必定局限了我們的工作。換句話(huà)說(shuō),容易得到大值或小值的目標函數,往往不是我們真正期望研究的,而是只能適宜于作近似的處理。
高溫高壓反應釜的化和其他設備同樣可靠。我們所能建立化的類(lèi)型,涉及揭示簡(jiǎn)化目標函數(例如收率、產(chǎn)量或總成本中的某些部分)的值,至于它是否有用,取決于該值應和我們確實(shí)感興趣的目標函數的值(如果能計算的話(huà))不致相差太大。
盡管如此,但可相信,這些簡(jiǎn)化了的研究仍是有其實(shí)用價(jià)值的,特別是當碰到一些特殊過(guò)程時(shí),它有助于我們提高信心,使我們有可能直觀(guān)地發(fā)現存在著(zhù)的值。重要的是應按探索的方法來(lái)運用上述結果,而不是要我們確信從簡(jiǎn)化目標函數求得值的計算結果,必然就是它的“”狀態(tài)。
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