The attribute Z-LR is available for zoning the optimization parameter LERA. It defines a node-polyline for which a polyline leakage coefficient (attribute LERA) should be determined.

 

Attention: Formally, it is necessary for all polygons for which a leakage coefficient is to be optimized using the inverse modelling, additionally to assign a leakage coefficient in the model files with LERA.

If an initial parameter for the leakage coefficient of a Z-LR-zone is specified in the parameter file, this parameter is optimized. From the initial parameter a node-based leakage coefficient is derived for the calculation of the direct problem by integrating the path length between the neighbouring polyline nodes. The additionally (and formally) in the model file entered leakage coefficient is in this case without meaning.

If no initial parameter for the leakage coefficient of a Z-LR zone is entered it is calculated with the leakage coefficient of the model file for this polyline.

 

Formulation of the inverse problems