FILL-IN-THE-BLANK: A standard ______________ can be actually taken as a reference and be used to solve the inverse problem.

A standard model can be actually taken as a reference and be used to solve the inverse problem.

In the context of scientific and mathematical disciplines, a model is a simplified representation of reality that helps us understand complex systems. When dealing with inverse problems, which often involve deducing unknown values or parameters based on observed data, having a standard model is essential. This model serves as a benchmark or a point of reference, allowing researchers to make inferences or predictions about the system under study. By adjusting the parameters of the standard model and simulating various scenarios, one can analyze how changes in inputs affect the outputs, thereby gaining insights into the underlying processes. This approach is widely used in fields such as physics, engineering, and data science.