Table 3.

Results of PCA dimension reduction.

Principal Component	Eigenvalue (×10−4)	Rate of Contribution %	Cumulative Contribution Rate %	Principal Component	Eigenvalue (×10−4)	Rate of Contribution %	Cumulative Contribution Rate %
1	105	64.7027	64.7027	17	0.7270	0.4480	95.1333
2	23	14.1730	78.8757	18	0.7093	0.4371	95.5704
3	7.3132	4.5065	83.3822	19	0.6739	0.4153	95.9857
4	4.3134	2.6580	86.0402	20	0.6557	0.4041	96.3898
5	2.3684	1.4594	87.4996	21	0.6444	0.3971	96.7869
6	1.6289	1.0038	88.5034	22	0.6092	0.3754	97.1623
7	1.3030	0.8029	89.3063	23	0.5796	0.3572	97.5195
8	1.2143	0.7483	90.0546	24	0.5147	0.3172	97.8367
9	1.1439	0.7049	90.7595	25	0.4998	0.308	98.1447
10	1.0941	0.6742	91.4337	26	0.4887	0.3011	98.4458
11	0.9919	0.6112	92.0449	27	0.4816	0.2968	98.7426
12	0.9173	0.5653	92.6102	28	0.4705	0.2899	99.0325
13	0.8805	0.5426	93.1528	29	0.4342	0.2676	99.3001
14	0.8576	0.5285	93.6813	30	0.4059	0.2501	99.5502
15	0.8398	0.5175	94.1988	31	0.3827	0.2358	99.786
16	0.7895	0.4865	94.6853	32	0.3476	0.2142	100.0002