As a consequence of being controlled by chemical kinetics, the HCCI ignition time can vary significantly with changes in the operating conditions, and this variation can limit the practical range of operation of the engine.
The additive hazards model considers a random variable Z, representing the changes in the operating conditions with an additive effect on (r(x)) when (Z=z), through the conditional hazard rate r(x mid z)=r(x)+z,quad xgeq0.
Despite the anoxic conditions, contaminants were not released from sediment, accumulating in fractions that proved to be stable faced with changes in the operating conditions of the CW.
Generally, the CFC is designed at nominal operating conditions of the system and, therefore, fails to provide the best control performance as well as global stability over a wide range of changes in the operating conditions of the system.
In particular, our approach allows to capture changes in the operating conditions (e.g., in the number of managed devices) still allowing to represent the underlying phenomena through generally distributed events.
In previous parts of this series methods were developed for the design of plants which are not only "optimal" at some nominal operating point but which can also deal effectively with disturbances and changes in the operating conditions.
Extensive tests have shown that the system reacts rapidly to changes in the operating conditions and effectively rejects disturbances due to unexpected changes in the quality of the material.
