| | Notations | 
|---|
 | Symbol | Definition | 
|---|
 | ${\mathop{o}\limits^{\wedge }}_{1},{\mathop{o}\limits^{\wedge }}_{2}$ | Convex hull |  | ${O}_{1},{O}_{2}$ | Object |  | $S$ | Point set |  | $P,{P}^{{\prime} }$ | Convex polygon |  | ${P}_{1},{P}_{2},{P}_{3},{P}_{4},{P}_{i}$ | Convex hull point |  | $N$ | Data size |  | $M$ | Solution number |  | $\tilde{N},\tilde{M}$ | Sample data size and solutions |  | P(x),$\tilde{P}(x)$ | Cumulative distribution function |  | ϵ | failure rate |  | ${v}_{0},{v}_{1}$ | Coordinate values |  |  | Convex hull point |  | $k$ | A copy to store convex hull point values |  | ${M}_{p}$ | The number of convex hull point | 
 |