Obviously, larger block sizes are computationally more costly and the computational burden arising from larger block size in SAD is far greater than the simple gradient orientation map computations in CGO.
Then, the dynamic surface control (DSC) technique is employed to avoid the problem of 'explosion of complexity', and just one adaptive law in the design of controller makes the system more simple and the computational burden lighter.
To overcome these requirements, recently, some new works have been developed with another type of Lyapunov functions, which is more effective to reduce the computational burden while maintaining less conservative results (see [44, 45]).
In fact, in these cases, the ESPRIT-based methods can estimate the spectral components more easily, requiring a lower computational burden than the methods that use the Prony model.
Furthermore, results also indicate that the second order forces may be calculated disregarding the free-surface forcing components, an option that helps to reduce the computational burden even more, rendering the procedure suitable for preliminary design calculations.
Note that, the more states, the more accurate results, but the greater the computational burden.
They have mainly aimed at enhancing the system accuracy, reducing computational burden and providing more compact codes.
Metamodelling is an increasingly more popular approach for alleviating the computational burden associated with computationally intensive optimization/management problems in environmental and water resources systems.
