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Closed-Loop Combustion Control Using Ion-Current Signals in a 6-Cylinder Port-Injected Natural-gas Engine

High EGR rates combined with turbocharging has been identified as a promising way to increase the maximum load and efficiency of heavy-duty spark ignition engines. With stoichiometric conditions a three-way catalyst can be used which means that regulated emissions can be kept at very low levels. Obtaining reliable spark ignition is difficult however with high pressure and dilution. There will be a

Frequency Deviations and Generation Scheduling in the Nordic System

Abstract in UndeterminedHigh penetration of variable generation such as wind power increases the demands on frequency control. The same applies to island operation and in particular if this involves variable generation, which is planned at the Danish island Bornholm. While it is obvious that the frequency control need to be considered, the disturbances caused to this control by the hourly dispatch

The pragmatics of imperative and declarative pointing

Bates (1976) is the starting-point for an analysis of pointing that does not involve explicit higher-order intentions. It is claimed that declarative pointing is essentially intersubjective, while imperative pointing is based on behaviourally motivated regularities. Declarative pointing has an indicating function. Other behaviours associated with it pertain either to its preparatory and enabling c