unsteady diffusion 中文意思是什麼
unsteady diffusion
解釋
非穩態擴散-
For a soil or rock of water - lacked, a heat transfer theoretical model is developed, which is a steady or unsteady, the results show that reservoir temperature, thermal diffusion coefficient, inlet temperature, flow rate of and run time of ground source heat pumps have an effect directly on heat transfer process of dhe. it can deduce that intermit running is favorable for this type of soils and rocks
對于貧含水地下巖土層建立了穩態與非穩態傳熱的理論模型，分析結果表明，巖土層的熱儲溫度、導溫系數、埋地換熱器進水溫度、流量以及地源熱泵系統的運行時間或開停機比，都對埋地換熱器的傳熱過程產生直接影響，可以推斷，對于該類型巖土層的地源熱泵系統，採用間歇運行將是有利的。 -
Then a one - dimensional unsteady incompressible flow with moving pollutant source model was proposed. the continuity equation, momentum equation and convection - diffusion equation were discredited using finite volume scheme. thus a software for predicting the air velocity and pollutant in railway double track tunnels was developed
接著，根據雙線鐵路隧道運營通風的特點，建立了一維不可壓縮非恆定流和流動污染源的物理模型以及山相應的連續性方程、動量方程和對流擴散方程構成的數學模型；在此基礎上，利用數值計算方法，編制了一套雙線鐵路隧道運營通風的數值計算程序。 -
The unsteady. flow theory is used for calculate air flow velocity and one - dimension unsteady convection - diffusion model is used for calculate pollutant concentration ( called unsteady theory model in general, utm ), and a new tunnel control method based on utm and neural network model is developed
本文首次採用更符合實際情況的隧道氣流?維非恆定流理論和污染物濃度?維非恆定對流擴散模型（統稱非恆定流理論模型）進行隧道通風控制方法的研究，並提出了一套基於非恆定流理論和神經網路模型的新的隧道通風控制方法。
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