Exact(8)
However, considering the great impact that a given control structure configuration can have on the process operability and product quality optimization, the time optimal grade transition problem needs to be solved in parallel with the optimal selection of the closed-loop control pairings between the controlled and manipulated variables.
An optimal grade transition control system integrating off-line optimizer and nonlinear model predictive controller is developed for polymerization reactors.
In this work, a simultaneous process and control system design under uncertainty is performed for optimal grade transition operation.
Simulation results are presented showing the significant quality and economic benefits that can be achieved through the application of the proposed integrated approach to the optimal grade transition problem for a gas-phase polyolefin FBR.
In the present study, a mixed integer dynamic optimization approach is applied to a catalytic gas-phase ethylene-1-butene copolymerization fluidized bed reactor (FBR) to calculate both the "best" closed-loop control configuration and the time optimal grade transition policies.
These cut-points represented the optimal grade limits and were chosen as thresholds for morphometrical grading (Table 2).
Similar(52)
However, to produce an optimal grading system, techniques to reduce the prediction error that overcome the asymmetric distribution of affected flesh, such as averaging multiple views, are still required.
However, the optimal grading system to assess this parameter is still debated (Gruenberger et al, 2012).
There is currently debate regarding the optimal grading system to evaluate medical student performance during the preclinical years.
To date, the optimal grading system to assess the PR remains a matter of debate (Gruenberger et al, 2012).
The distinction between G1 and G2 NENs is based on a very subtle difference in the proliferative rate, which may not be optimal grading threshold and hence accountable for the discrepancy in grading and prognostic value.
Write better and faster with AI suggestions while staying true to your unique style.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com