irrigation norm 中文意思是什麼
irrigation norm
解釋
灌溉標準- irrigation : n. 1. 灌溉；水利。2. 【醫學】沖洗（法），〈pl. 〉沖注洗劑。adj. -al ,-ist n. 灌溉者，水利專家。
- norm : n. 1. 規范，模範；準則；（教育）標準。2. （勞動）定額；【數學】模方；范數。
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Based on the analyses of the investment of nozzle tube net and relationship between the annual operation cost and tube diameter function of a fixed spray irrigation system, a mathematic model to calculate the economical tube diameter of a spray irrigation system is developed by using the minimum expense norm and nonlinear planning theory in engineering economic analysis, and a direct calculation formula for the economical tube diameter in unrestrained conditions is presented
摘要在分析了固定式噴灌系統的管網投資、年運行費用與管徑函數關系的基礎上，利用工程經濟分析中費用最小化準則和非線性規劃理論，建立了求解噴灌系統管網經濟管徑的數學模型，並給出了無約束條件直接求解經濟管徑的計算式。 -
This paper based on the goal of establish properly water saving model, taking economic benefits, environmental benefits and technical feasibility indexes as norm, using analytic hierarchy process to compare the canal seepage control, water conveyance pipe, sprinkler irrigation and microspray irrigation the 4 project technologies of water saving, in order to choose the suitable water saving model
以建立適宜節水灌溉工程體系為目標，以經濟效益、環境效益、技術可行性3項指標為準則，採用層次分析法對渠道防滲、管道輸水、噴灌、微灌4項工程節水技術進行比選，最後選出適合河北省實際情況的節水灌溉技術。
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