Comparison of Different Independent Component Analysis Algorithms for Output-Only Modal Analysis

Table 2

Comparison of three optimization methods.

Evaluation factor	Gradient descent	Stochastic gradient descent	Quasi-Newton
Computational complexity	Middle	Simple	Complex
Need step parameter	Yes	Yes	No
Iterative times	Middle	High	Low
Convergence rate	Middle	Slow	Fast
Iterative efficiency	High	Middle	Low