Math Problem Statement
请帮忙写一条公式,变量有CO2浓度,VOC浓度和PM2.5浓度,将污染物浓度与风速4速档位(0关机,1低档,2中档,3高档)关联形成一个公式。CO2限值900,VOC限值500,PM2,5限值12,可使用无量纲化消除不同值大小的影响。当低于所有限值30%,关机;当其中某一个浓度高于限值10%,但其他浓度低于限值20%,低档;当两个浓度低于限值10%,低档;当两个浓度低于5%,中档;当高于限值大档。
Solution
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Math Problem Analysis
Mathematical Concepts
Dimensional Analysis
Inequalities
Systems of Equations
Formulas
X_CO2 = C_CO2 / L_CO2
X_VOC = C_VOC / L_VOC
X_PM2.5 = C_PM2.5 / L_PM2.5
S = case (0, if all X <= 0.7; 1, if max(X) > 1.1 and min(X) <= 0.8; 2, if two concentrations > 1.1; 3, if max(X) > 1.1)
Theorems
Non-dimensionalization theorem
Suitable Grade Level
Undergraduate
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