WOLFRAM SYSTEM MODELER
    Rate_equationNon-linear function describing the rate equations  | 
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SystemModel["SystemDynamics.IntroductoryExamples.Influenza.Rate_equation"]

| u1 | 
         Type: RealInput Description: First input variable  | 
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| u2 | 
         Type: RealInput Description: Second input variable  | 
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| y | 
         Type: RealOutput Description: Output variable  | 
    
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         SystemDynamics.IntroductoryExamples.Influenza Model of an influenza epidemic  |