What Is A Hierarchical Models? Hierarchical models, also known as hierarchical statistical models, multilevel models or random-effects models, are tools for analysing data with a nested or grouped ...

In terms of the length scale of structural features, material structure can be classified into macroscopic, mesoscopic, and microscopic structures. And the microscopic structure of materials can be ...

Background The Para athletics wheelchair-racing classification system employs best practice to ensure that classes comprise athletes whose impairments cause a comparable degree of activity limitation.