The material variables were the aggregate type (natural coarse aggregate (NCA) and recycled coarse aggregate (RCA)), surface roughness, and curing time before splitting (7 d and 28 d).
For material deprivation, the variables are proportion of persons lacking a high school diploma, employment to population ratio, and average income.
The material design variables were screened by evaluating their statistical, technical, and practical significance and satisfaction models were developed by quantification I analysis.
Based on literature survey, customer reviews on the web, and expert opinions, 8 15 material design variables were defined for the interior parts.
The optimization criterion is construction cost and the decision variables are material types, placing temperature, the height of lifts and time intervals between lifts.
The validation proves that, if the material behaviour and imperfection variables are known, the ultimate collapse strength of casing can be predicted to a satisfactory degree of accuracy.
A series of five parametric 2D finite element models with geometry and materials placement variables were created and incorporated into a genetic optimisation algorithm.
In an oxidizing atmosphere, the material composition and the processing variables are shown to play an important role in determining the material absorptivity and the extent of hardening.
The discrete variables are the material types and continuous variables are the thicknesses of the panels.
The control variables are the material and the shape.
