Wyniki wyszukiwania - BazTech

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Solving a stochastic time-cost-quality trade-off problemby meta-heuristic optimization algorithms

Mohammadi Mohammad Owais, Dede Tayfun, Grzywiński Maksym

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

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2022

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Vol. 11

41--48

EN

Actual time, cost, and quality of execution options for various activities within a considered project cannot be certainly determined prior to construction, there could be three different values of time and cost for each execution option, namely, optimistic value, most likely or normal value, and pessimistic value; and the quality could be described in linguistic terms.The objective of this research is to optimize time, cost, and quality of construction projects under uncertainty utilizing the program evaluation and review technique. In this study, multi-objective functions are used to decrease total project time and total project cost whilemaximizing overall project quality. For satisfying time-cost-quality trade-off optimization, a multi-objective optimization strategy is required. The non-dominating sorting-II conceptand the crowding distance computation mechanism are combined with the teaching learning-based optimization algorithm to optimize time-cost-quality optimization problems. Non-dominating sorting-II teaching learning-based optimization algorithm is coded in MATLAB to optimize the trade-off between time, cost, and quality optimization problems. In the proposed model, the non-dominating sorting-II approach and crowding distance computationmechanism are responsible for handling objectives effectively and efficiently. Teaching learning-based optimization algorithm’s teacher and learner phases ensure that the searched solution space is explored and exploited. The proposed algorithm is applied to a 13-activity example problem, and the results show that it provides satisfactory results.

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Problemy projektowanie i optymalizacji współczesnych sieci telekomunikacyjnych

Pióro M., Bąk A., Gajowniczek P., Mycek M.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2010

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nr 4

128-130

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Implementacja modelu Zimmermanna do optymalizacji ruchu barek przy podejściu do śluzy

Uchacz W.

Zeszyty Naukowe / Akademia Morska w Szczecinie

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2004

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nr 2 (74)

383-393

PL

Odra jest naturalnym szlakiem żeglugowym dla barek obsługujących ruch towarowy między portami Szczecina i Berlina. W związku z planowanym znacznym wzrostem przewozu ładunków po wejściu Polski do Unii Europejskiej, podjęto próbę oceny ograniczeń w ruchu wynikających z przejścia śluzy Hohensaaten, łączącej Odrę z kanałem Odra - Havela. W artykule przedstawiono rozmyty model matematyczny ruchu barek należący do klasy zadań rozmytego liniowego programowania matematycznego, opartego na symetrycznym rozmytym modelu Zimmermanna.

EN

Odra is a natural shipping route for barges carrying goods between Szczecin and Berlin harbours. As a significant increase of cargo transport is expected to take place after Poland's accession to the UE, some efforts have been made to estimate the limitations in traffic, resulting from the passage through the Hohensaaten lock, connecting Odra with the Odra-Havel Canal. The article presents a mathematical model of barge traffic, belonging to the fuzzy integer linear programming problems, based on the symmetric model proposed by Zimmermann.