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1

Hybrid genetic algorithm for bi-criteria objectives in scheduling process

Raghavendra B. V.

Management and Production Engineering Review

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2020

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Vol. 11, No. 2

107--112

EN

Scheduling of multiobjective problems has gained the interest of the researchers. Past many decades, various classical techniques have been developed to address the multiobjective problems, but evolutionary optimizations such as genetic algorithm, particle swarm, tabu search method and many more are being successfully used. Researchers have reported that hybrid of these algorithms has increased the eﬃciency and eﬀectiveness of the solution. Genetic algorithms in conjunction with Pareto optimization are used to ﬁnd the best solution for bi-criteria objectives. Numbers of applications involve many objective functions, and application of the Pareto front method may have a large number of potential solutions. Selecting a feasible solution from such a large set is diﬃcult to arrive the right solution for the decision maker. In this paper Pareto front ranking method is proposed to select the best parents for producing oﬀspring’s necessary to generate the new populations sets in genetic algorithms. The bi-criteria objectives minimizing the machine idleness and penalty cost for scheduling process is solved using genetic algorithm based Pareto front ranking method. The algorithm is coded in Matlab, and simulations were carried out for the crossover probability of 0.6, 0.7, 0.8, and 0.9. The results obtained from the simulations are encouraging and consistent for a crossover probability of 0.6.

2

Czwarte oblicze makroergonomii

Jasiak A.

Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie

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2016

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Nr 71

137--150

PL

Celem artykułu jest synteza znanych ujęć makroergonomii oraz wskazanie kierunku jej rozwoju w ujęciu autorki. W opracowaniu przedstawiono cztery koncepcje makroergonomii. Pierwsza koncepcja H.W. Hendricka odnosi się do systemów socjotechnicznych. Kolejne ujęcie jest autorstwa L. Pacholskiego i odnosi się do systemu makroergonomicznego – ergonomicznego systemu przemysłowego. Trzecia koncepcja jest syntezą podejścia H.W. Hendricka oraz B.M. Kleinera, w której autorzy utożsamiają makroergonomię z projektowaniem systemów pracy. Ponadto autorka zaproponowała kierunki rozwoju makroergonomii w systemach pracy, co stanowi kolejny etap rozwoju makroergonomii.

EN

The aim of the article is a synthesis of known approaches to macroergonomics and an indication of the direction of its development, according to the author. The paper presents three concepts of macroergonomics. The first concept by H.W. Hendrick refers to systems of social engineering. Another approach, by L. Pacholski, refers to a macroergonomic system – an ergonomic industrial system. The last concept is a synthesis of approaches by H.W Hendrick and B.M Kleiner, in which the authors identify macroergonomics as the design of work systems. In addition, the author proposes the developmental direction of macroergonomics in work systems, which is another approach to macroergonomics.

3

On the modeling of car passenger ferryship design parameters with respect to selected sea-keeping qualities and additional resistance in waves

Cepowski T.

Polish Maritime Research

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2009

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nr 3

3-10

EN

This paper presents the modeling of car passenger ferryship design parameters with respect to such design criteria as selected sea-keeping qualities and additional resistance in waves. In the first part of the investigations approximations of selected statistical parameters of design criteria of ferryship were elaborated with respect to ship design parameters. The approximation functions were obtained with the use of artificial neural networks. In the second part of the investigations design solutions were searched for by applying the singleand multi-criterial optimization methods. The multi-criterial optimization was performed by using Pareto method. Such approach made it possible to present solutions in such form as to allow decision makers (shipowner, designer) to select solutions the most favourable in each individual case.

4

Design parameters optimisation of ROPAX ferry using seakeeping characteristics and additional wave resistance

Cepowski T.

Problemy Eksploatacji

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2008

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nr 2

149-158

EN

This paper presents the multi-criteria design parameters of the optimisation of the ROPAX ferry using sea-keeping characteristics and additional wave resistance. The design criteria were formed using the method based on deterministic scenario and the partial objective functions were determined as artificial neuron networks. The design parameters' optimisation was carried out with the Pareto method. The best design variants were chosen using the elements of fuzzy logic that allowed, among other things, to present design quality with linguistic variables. This approach allowed choosing the best variant concerning all criteria at the same time.

PL

W artykule przeprowadzono wielokryterialną optymalizację parametrów projektowych promu pasażersko-samochodowego pod kątem wybranych właściwości morskich i dodatkowego oporu statku na fali. Kryteria projektowe sformułowano posługując się metodą opartą na scenariuszach deterministycznych, natomiast funkcje celów cząstkowych wyznaczono w postaci sztucznych sieci neuronowych. Optymalizację parametrów projektowych przeprowadzono metodą Pareto. Do wyboru najlepszych wariantów projektowych wykorzystano elementy logiki rozmytej, co pozwoliło m.in. na przedstawienie walorów projektu za pomocą zmiennych lingwistycznych. Takie podejście umożliwiło wybór wariantu najlepszego pod kątem wszystkich kryteriów jednocześnie.