Jerzy Miescicki

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In this paper, an original heuristic algorithm of empty vehicles management in Personal Rapid Transit (PRT) network is presented. The algorithm is used for the delivery of empty vehicles for waiting passengers; for balancing the distribution of empty vehicles within the network; for providing an empty space for vehicles approaching a station, etc. Each of(More)
The case study analyzed in the report involves the behavioral specification and verification of a three-stage pipeline consisting of mutually concurrent modules which also compete for a shared resource. The system components are specified in terms of Concurrent State Machines (CSM) and the verification technique used is the temporal model checking in the(More)
The paper presents a flexibility of management of vehicles in Personal Rapid Transit (PRT) network. The algorithm used for delivering empty vehicles for waiting passengers is based on multiparameter analysis. Due to its distributed construction, the algorithm has a horizon parameter, which specifies the maximum distance between stations the communications(More)
An engineering design process may involve software modules that can executed concurrently. Concurrent modules can be very easily subject to some synchronization errors. This paper discusses verification process for such engineering software. We present a method for verification that requires several steps. First, the state diagram models are constructed(More)
The aim of this paper is to demonstrate how the COSMA environment can be used for system modeling. This environment is a set of tools based on Concurrent State Machines paradigm and is developed in the Institute of Computer Science at the Warsaw University of Technology. Our demonstration example is a distributed brake control system dedicated for a railway(More)
The paper discusses how a bridge between the design practice and the formal methods could be maintained. The use of model checking seems to be the most promising approach. Then, the software environment COSMA is presented, implementated in the Institute of Computer Science,WUT. The conceptual framework of COSMA is based upon Concurrent State Machines (CSM)(More)
Concurrent software for engineering computations consists of multiple cooperating modules. The behavior of individual modules is described by means on state diagrams. In the paper, the constraints on state diagrams are proposed, allowing for the specification of designer’s intentions as to the synchronization of modules. Also, the translation of state(More)
Experimental data used as a base for the design of rough controllers may result from measurements done in systems with a delay in the controller, which (even if the delay is purely deterministic) could make raw data look as if they were ’imprecise’ or ’scattered’. Awareness of this phenomenon supported by frequency domain identification can improve the(More)