Recently, we proposed a cortical-based model that accounts for a range of psychophysical results on contour salience [S.C. Yen, L.H. Finkel, Vision Res. 38 (1998) 719}741]. In this model, cortical units are interconnected by long-range horizontal connections where the connection strength between units is de"ned by an inter-element spatial connectivity function. In the present work, we determine...

Complex process plants increasingly appear in modern chemical industry due to the considerable economic efficiency that complex and interactive process designs can offer. Interactions between process units (e.g., material recycle and energy integration) often cause significant difficulties in plantwide control. As such, it is important to study plantwide operability (i.e., whether a plantwide p...

Many natural systems can be represented by complex networks of dynamical units with modular structure in the form of communities of densely interconnected nodes. Unraveling this community structure from observed data requires the development of appropriate tools, particularly when the nodes are embedded in a regular space grid and the datasets are short and noisy. Here we propose two methods to...

In this paper, a multi-area Automatic Generation Control (AGC) scheme with Renewable Energy Sources (RES) suitable in a restructured interconnected power system has been proposed. Photo-voltaic and wind turbine generating system has been integrated with the grid. The developed scheme has been investigated for frequency control with and without RES units. A PID controller has been used to contro...

A key challenge in sharing-oriented information management environments, such as networks of heterogeneous, autonomous database systems, is to provide capabilities to allow information units and resources to be exibly and dynamically combined and interconnected, while at the same time preserving the investment in and the autonomy of each individual component. The research described here speciic...

Support for interoperability among autonomous heterogeneous database systems is emerging as a key information management problem for the s A key challenge for achieving interoperability among multiple database systems is to provide capabilities to allow information units and resources to be exibly and dynamically combined and interconnected while at the same time preserve the investment in and ...

Self-organization and pattern formation in network-organized systems emerges from the collective activation and interaction of many interconnected units. A striking feature of these non-equilibrium structures is that they are often localized and robust: only a small subset of the nodes, or cell assembly, is activated. Understanding the role of cell assemblies as basic functional units in neural...

The continuous developments in information and communication technology have recently led to the appearance of distributed computing environments, which comprise several, and different sources of large volumes of data and several computing units. The most prominent example of a distributed environment is the Internet, where increasingly more databases and data streams appear that deal with seve...