In this simulation study the operation of conventional distillation column (column with one feed and two products) was investigated with the application of AspenPlus Dynamics software. Control structures of the column which separate a two-component mixture were studied. The aim of our investigations was to discover dynamic and steady-state effects of heating and cooling on tray temperatures. Th...

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What is it that unifies the control task in all its manifestations, from the thermostat to the operator of a nuclear power plant? At the same time, how do we explain the variety of the solutions that we see for the task? I propose a Knowledge Level analysis of the task which leads to a task-structure for control. Differences in availability of knowledge, the degree of compilation in the knowled...

Real-world tasks require planners to search for solutions in a partially observable state space. Planning in partially observable domains is computationally expensive—it is impossible to plan for all possible contingencies in advance. Furthermore, real world scenarios introduce a huge variety of context-dependent variation in the dynamics of belief in response to new information. Our approach i...

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Architectural synthesis tools map algorithms to architectures under real time constraints and quickly provide estimations of area and performance. However, these tools do not take the VLSI circuit interconnection cost into account whereas this cost becomes predominant with the technology decrease and the application complexity increase. A new methodology that enables the interconnection cost to...

Sophisticated agents operating in open environments must make complex real-time control decisions on scheduling and coordination of domain actions. These decisions are made in the context of limited resources and uncertainty about outcomes of actions. The question of how to sequence domain and control actions without consuming too many resources in the process, is the meta-level control problem...

In distributed environments, location control of objects among hosts is a crucial concern. This paper proposes a new mechanism of object location control using meta-level programming which provides the following advantages to programmers. First, the description of location control can be separated from the application program by exploiting the meta-level architecture. This separation makes it e...

Considering a grid cell with a single central point the solution of the discretized Laplace equation may be conceived as a weighted average of points on the cell boundary. Our grid control method is based on a local perturbation of the numerical solution to the Laplace equation by specifying line-wise central target points relative to the orientation of and the distance from the cell’s bounding...