The chapter also describes the regeneration techniques using the nonlinear gates and synchronous modulation.
Periodic operations of a non-isothermal CSTR with n-th order reaction, subject to a single input modulation, is analysed using the nonlinear frequency response (NFR) method, introduced in our previous publications.
Periodic operation of a non-isothermal CSTR subject to a single input modulation is analyzed considering a nth order reaction and using the nonlinear frequency response (NFR) method, introduced in our previous publications.
Therefore, the modulation components can be easily buried under noise levels and it becomes difficult to extract the nonlinear modulation components under noisy environments using a conventional spectral density function.
For the evaluation of fire-damaged concrete, the nonlinearity parameter measured by the nonlinear modulation method provided higher sensitivity than that measured by the nonlinear resonance vibration method.
In this study, nonlinear spectral correlation, which calculates the spectral correlation between nonlinear modulation components, is proposed to isolate the nonlinear modulation components from noisy environments and used for fatigue crack detection.
The ratio of increase as measured by the nonlinear modulation method increases noticeably with temperature compared to that for the nonlinear resonance vibration method.
Based on the comparison, it can be concluded that although the results of the nonlinear modulation method are more scattered than those of the nonlinear resonance vibration method, the nonlinear modulation method can better reflect fire damage (contact-type defects) at high heating temperatures than the nonlinear resonance vibration method.
On the other hand, Yim et al. (2014) measured the nonlinearity parameters of concrete samples fabricated with mix proportions same as to those in a previously mentioned study, using a nonlinear modulation method (Van Den Abeele et al. 2000b).
We also solve the resilience problem using the fixed enzyme modulations on HXT and PFK, which is a nonlinear programming (NLP) problem, for comparison.
