2018 (vol. 28) - Number 4

*T. Kaczorek:*

A new method for computation of positive realizations of fractional linear continuous-time systems

*A. Biswas, A. Sarkar:*

Development of dual hesitant fuzzy prioritized operators based on Einstein operations with their application to multi-criteria group decision making

*L. Li, R. Zhang, J. Wang, X. Shang:*

Some q-orthopair linguistic Heronian mean operators with their application to multi-attribute group decision making

*J. Duda:*

Lyapunov matrices approach to the parametric optimization of a system with two delays and a PD controller

*M. Lhous, M. Rachik, El M. Magri:*

Ideal observability for bilinear discrete-time systems with and without delays in observation

*P.T. Anh, A. Babiarz, A. Czornik, M. Niezabitowski:*

Variation of constant formulas for fractional difference equations

*K. Bingi, R. Ibrahim, M. Noh Karsiti, S. Miya Hassan, V. Rajah Harindran:*

A comparative study of 2DOF PID and 2DOF fractional order PID controllers on a class of unstable systems

ACS Abstract:

**1997 (Volume 6)**

Number 3/4

**A numerically simplified fuzzy logic controller**

Bogdan Kasztenny, Andrzej Wiszniewski(Wrocław University of Technology, Poland ) | Constantine Hatziadoniu(Constantine Hatziadoniu) |

**keywords:** Fuzzy Logic Control, T-operators, Numerical Optimization, Power System Stabilizer.

**Adaptive stabilization of a class of semilinear parabolic distributed parameter systems in the case of collocated actuators and sensors**

Toshihiro Kobayashi, Jiachun Fan(Kyushu Institute of Technology, Japan ) |

**keywords:** adaptive stabilization, semilinear distributed parameter systems, collocated input and output, boundary input and output.

**Optimal control of distributed stochastic systems with delays in the control**

M. Rachik(Faculté des Sciences Ben M'sik, Morocco ) | J. Karrakchou(Ecole Mohammadia d'Ingénieurs, Morocco ) |

**keywords:** Delayed control, Distributed stochastic systems, Hilbert uniqueness method, Optimal control, Separation principle theorem.

**On the dynamics of a closed-loop system with hysteresis**

Andrzej Ossowski(Institute of Fundamental Technological Research PAN, Poland ) |

**keywords:** Lyapunov function, feedback stabilization, bang-bang control, hysteresis.

**Overshoots in 2-nd class of linear control systems**

Mieczysław Zaczyk(University of Mining and Metallurgy, Poland ) |

**keywords:** control system analysis, 2-nd class of linear control systems, overshoots in linear systems.

**Floating-point roundoff errors in first-order filters of digital controllers**

Zbigniew Świder(Technical University of Rzeszów, Poland ) |

**The quest for small benchmarks for the chromatic sum problem**

W. Głazek, M. Kubale, K. Manuszewski(Technical University of Gdańsk, Poland ) |

*HCT*(resp.

*HCT*) if some (resp. every) implementation of the algorithm gives a bigger total than the chromatic sum. In this paper we give the smallest

*HCT*and slightly

*HCT*graphs for the most popular vertex coloring algorithms when adapted to the chromatic sum problem. Some of them have been obtained by exhaustive computational search. Our results confirm that algorithms based on the independent sets principle are much better than those realizing a sequential coloring approach.

**Circular built-in self-test for controllers with many internal clocks**

Michał Kope(University of Silesia in Cieszyn, Poland ) |

**keywords:** Built-In Self-Test, Pseudorandom Test, Sequential Circuit Testing

**Robustness of fuzzy control with respect to plant parameters modifications - simulation results**

Jacek Kluska(Rzeszow University of Technology, Poland) |

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