Application of a Derivative-Free Method with Projection Skill to Solve an Optimization Problem  | 
	
|   Figure 3   Spatial distributions of CNOPs m s -1  calculated by the a, d SPG2 algorithm and b, e DE algorithm, and the c, f CNOP differences m s -1  DE minus SPG2 when  n = 101 and  T = 40 s, 50 s, respectively.  | 
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