When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
A model is a representation of a system made of concepts, mathematical formulas and calculations to predict and understand the data. A model can be physical or conceptual. It allows systems to optimize and predict.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.