Parameters in the Model
p1: The Euclidian distance between two cells
p2: The square of the distance between C1 and the origin (0,0) (a control parameter)
p3: The square of the distance between C2 and the origin (0,0) (a control parameter)
p4: The number of connections between C1 and C2
p5: The total weighted connectivity of the cells in the candidate move
p6, p7: Force change to weighted center of gravity
Cost Function: Change in the size of the maximum net bounding-box for all nets connected to the candidate cells to be swapped