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The problem of adaptive determination of data granularity for QoS-constraint query execution is addressed. An application specifies QoS requirements with a query. Then, each node can choose the optimum data granularity for local data collection and transmission. The proposed algorithm is in a distributed fashion, and executed at each local sensor node.
Variable speed wind turbine control is essential in extracting maximum electric power out of available wind power. The paper presents a memory-based method for variable speed control of wind energy conversion systems. The fundamental idea behind the method is to use certain memorized information (i.e., current rotor speed tracking error, most recent speed tracking error, and previous control experience)...
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