Structure Optimization of Carbon Nanotubes Based on Swarm Intelligence Algorithm and Evolutionary Computation

Table 2

Nanoparticle unit cell elastic stiffness matrix.

(GPa)	1	2	3	4	5
1	6.98	5.32	5.01	-0.31	-0.05
2	7.63	6.31	5.21	-0.04	1.37
3	6.31	4.74	6.97	1.43	0.39
4	5.02	5.25	3.28	0.41	1.39
5	-0.41	-0.03	-0.15	0.039	0.52