Nonlinear multirate control of a polymerization reactor: an experimental study

2000 ◽  
Author(s):  
M. Niemiec ◽  
C. Kravaris
Keyword(s):  
Experimental Study ◽  
Polymerization Reactor ◽  
Multirate Control

scholarly journals Nonlinear control of a batch polymerization reactor: An experimental study

AIChE Journal ◽  
1992 ◽  
Vol 38 (9) ◽  
pp. 1429-1448 ◽  
Author(s):  
Masoud Soroush ◽  
Costas Kravaris
Keyword(s):  
Experimental Study ◽  
Nonlinear Control ◽  
Polymerization Reactor

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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