2017 (vol. 27) - Number 2

*W. Bozejko, M. Wodecki:*

Discrete Systems: Theory and Applications. Special issue.

*G. Bocewicz, Z. Banaszak, I. Nielsen:*

Delivery-flow routing and scheduling subject to constraints imposed by vehicle flows in fractal-like networks

*W. Bozejko, A. Gnatowski, R. Idzikowski, M. Wodecki:*

Cyclic flow shop scheduling problem with two-machine cells

*W. Bozejko, M. Uchronski,, Z. Chaczko, M. Wodecki:*

Parallel patterns determination in solving cyclic flow shop problem with setups

*J. Brodny, S. Alszer, J. Krystek, M. Tutak:*

Availability analysis of selected mining machinery

*K. Chmielewska, D. Formanowicz, P. Formanowicz:*

The effect of cigarette smoking on endothelial damage and atherosclerosis development - modeled and analyzed using Petri nets

*A. Galuszka, J. Krystek, A. Swierniak, T. Grzejszczak, C. Lungoci:*

Information management in passenger traffic supporting system design as a multi-criteria discrete optimization task

*M. Kardynska, J. Smieja:*

Sensitivity analysis of signaling pathway models based on discrete-time measurements

*J. Kasprzyk, P. Krauze, S. Budzan, J. Rzepecki:*

Vibration control in semi-active suspension of the experimental off-road vehicle using information about suspension deflection

*M. Koryl, D. Mazur:*

Towards emergence phenomenon in business process management

*M. Koryl:*

Active resources concept of computation for enterprise software

*H. Krawczyk, M. Nykiel:*

Mobile devices and computing cloud resources allocation for interactive applications

*W. Mitkowski, W. Bauer, M. Zagórowska:*

Discrete-time feedback stabilization

*J. Pempera:*

An exact block algorithm for no-idle RPQ problem

*K. Rzosinska, D. Formanowicz, P. Formanowicz:*

The study of the influence of micro-environmental signals on macrophage differentiation using a quantitative Petri net based model

*K. Skrzypczyk , M. Mellado:*

Vehicle navigation in populated areas using predictive control with environmental uncertainty handling

*W. Bozejko, J. Pempera, M. Wodecki:*

A fine-grained parallel algorithm for the cyclic flexible job shop problem

ACS Abstract:

**2003 (Volume 13)**

Number 4

**Robot controller with a self-measurement capability enabling the identification of friction**

Adam Wozniak, Wojciech Szynkiewicz and Cezary Zielinski(Warsaw University of Technology, Poland) |

**keywords:** robot controller, servomechanism, friction model, identification.

**The interval parabolic system**

Krzysztof Oprzedkiewicz(University of Mining and Metallurgy, Poland) |

**keywords:** interval systems, parabolic systems,the exponential stability.

**On controllability and minimum energy control of linear positive systems with delays**

Beata Sikora(Silesian University of Technology, Poland) |

**keywords:** positive dynamical systems, delay systems, relative controllability, admissible control, minimum energy control.

**Active control of circular plate vibration by using piezoceramic actuators**

Lucyna Leniowska and Ryszard Leniowski(University of Rzesz?w, Poland) |

**keywords:** active vibration control, feedback control, piezoceramic transducers, identification methods.

**Multivariable robust control applied to steering of three ship's velocities**

Witold Gierusz(Gdynia Maritime University, Poland) |

**keywords:** training ship, simulation model, multivariable system, robust control, real-time steering.

**Hierarchical control in a large scale stochastic system with nonclassical information structure**

Zdzislaw Duda and Witold Brandys(Silesian University of Technology, Poland) |

**keywords:** large scale system, stochastic system, decentralized control, optimal control.

**Errors of elementary floating-point operations in control algorithms**

Zbigniew Swider(Technical University of Rzeszow, Poland) |

*b*denotes the number of mantissa bits. Error of Euler rectangular integrator , commonly used in digital controllers, is evaluated as well. For small sampling step the error depends primarily on precision of the addition executed by the integrator. Increase of the precision used in some small controllers is also considered. The results are verified for first-order transfer function subject to white noise, sinusoidal and constant-plus-noise inputs.

**keywords:** floating-point arithmetic, roundoff errors, delta-operator, stochastic systems.

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