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Predictive queries on moving objects offer an important category of location-aware services based on the objects' expected future locations. A wide range of applications utilize this type of services, e.g., traffic management systems, location-based advertising, and ride sharing systems. This paper proposes a novel index structure, named Predictive tree (P-tree), for processing predictive queries...
This paper presents the Geo Feed system, a location-aware news feed system that provides a new platform for its users to get spatially related message updates from either their friends or favorite news sources. Geo Feed distinguishes itself from all existing news feed systems in that it takes into account the spatial extents of messages and user locations when deciding upon the selected news feed...
This paper proposes a scheme for improving the mixing in the boundary layer of pressure-driven membrane systems such as reverse osmosis and ultrafiltration. Through application of an external electric field, a flow of ions in the vicinity of the membrane surface will be generated, creating simultaneous electro-osmotic flow that should reduce the concentration polarization on the membrane surface....
An independent stability assurance layer for the multivariable controller in the hierarchical control architecture is introduced in this paper. This stability layer provides an integrated safety and protection measure to process control systems from closed-loop instabilities, which may cause process upsets and shutdowns. It prevents disruptive shutdowns by providing corrective actions to the controller...
A new real time stability constraint for model predictive control is developed in this paper. Motivated by the dissipative system theory, the proposed stability condition is based on the controller trajectory and can be implemented on-the-fly to ensure the stability of MPC systems. The stability bound on the immediate-future values of manipulated variables is iteratively computed from the resultant...
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