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A coordination strategy in multilevel systems is concerned, which has noniterative computational characteristics. It founds on "preposition - correction" algorithm, which allows performing limited data transfer between the levels. This coordination benefits the real time operation in multilevel system. Example is provided, solving a nonlinear steady state optimization problem.

Relations between the multilevel theory and the organizational systems are considered. Appliance of a new coordination strategy for organizational hierarchical systems is worked out. A noniterative coordination (NIC), reducing the information flows between the levels in the system is applied. NIC is applied for the case of resource allocation in organizational two level systems.

EDIPA is an acronym of Electronic Data Interchange in Port Administration of a project No 977076 funded partially by the European Commission under framework of INCO-COPERNICUS program 1998. The EDIPA project objectives concern the automation and the amelioration of the business transactions between the port authorities, providing a network that solves transportation problems of the current state and practice of the port administrations. An implementation of an Electronic Data Interchange (EDI) system is under way which automates and performs paperless transactions used between clearance house, Port Authorities, customers to monitor/supervise the traffic products imported and/or exported.

A coordination strategy in multilevel systems with noniterative computational characteristics is given. It founds on "preposition - correction" algorithm which performs limited data transfer between the levels. This coordination benefits the real time of multilevel interconnected system and the analytical solution of quadratic optimization problems.

Traffic optimal control in local area networks for industrial process control is discussed in the paper. Using the flying horizon method the hierarchical structure of the network control is described as well as the control algorithms of the stations in coordinator and master modes. Special attention is paid to the software structure, allowing the on-line execution of the algorithms. Some computational results are presented. The algorithms have been applied in the SLINK4 communication system created in the Institute of Industrial Cybernetics and Robotics.

The reason for studying the hierarchical systems vas that direct computation of optimal control solutions for large scale systems is rather difficult and time consuming job. The hierarchical multilevel theory intends to resolve the discrepancy between the complex requirements to the control process and the restrictions on computer power. The paper introduces a coordination policy, vhich decreases the information transfer in the multilevel systems. Real time requirements are satisfied due to the lack of iterative computations.

An overview of the problems, which occur in the design and realization of the real time systems of automatic vehicle location, is presented.The possibility of using the locational and navigational principles for vehicle tracing in urban conditions is discussed. A complete problems ‘description is proposed including systems’ operation rules and their most important technical units.

A kind of hierarchical decentralized operation of a wide spread space systems like an automatic vehicle system location is examined.An on-line control policy is presented using multilevel control theory.A complete mathematical description of the control system structure is given.It is described an algorithm for the control policy, which uses irregular calls and locations and the knowledge about the system and vehicle positions is maximal.

An algorithm for distributed optimum traffic control in local area networks f or real time applications is discussed in the paper. Using the flying horizon method, an optimum control strategy is developed, realizing totally distributed network control, thus reducing the number of service messages.

A non-iterative adaptive method for real-time control in multilevel systems is presented. The original problems of dynamic coordination is reduced to the resolution of a system of linear algebraic equations. The method is applied to a distributed transport allocation system, described in a discrete state space form. The adaptation is expressed in periodical redistribution of resources among the subsystems. A numerical example is given and the results are illustrated.

An approach for traffic control green light duration is proposed. An optimization problem for minimizing the vehicles queues at the crossroads is determined. Hierarchical noniterative method for its solution is developed. It allows the solution of the optimization problem to be performed in real time by hierarchical technical system. The method is applied for two space distributed crossroads junctions in Sofia.

An on-line control polycy for data transmission in a class of a microprocessor network is presented. An adaptive algorithm for communication in a multilevel system is concerned. Two optimal problems are defined. Using a multilevel approach a complete mathematical description is proposed. A real time operation procedure is introduced according to the global optimal problem. On every step the procedure adapts the global problem toward the behaviour of the system. Two examples are introduced to illustrate the operation rules of the control system