SPIE Proceedings [SPIE Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation - Beijing, China (Friday 13 October 2006)] Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation - Multiple-estimator-based control for a class of uncertain networked control systems with long time delay