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    Wyświetlanie 1-3 z 3
    Tytuł:
    Evacuation by leader-follower model with bounded confidence and predictive mechanisms
    Autorzy:
    Almeida, Ricardo
    Girejko, Ewa
    Machado, Luis
    Malinowska, Agnieszka B.
    Martins, Natália
    Powiązania:
    https://bibliotekanauki.pl/articles/1845516.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multi-agent systems
    emergency
    model predictive control
    bounded confidence
    Opis:
    This paper studies an evacuation problem described by a leader-follower model with bounded confidence under predictive mechanisms. We design a control strategy in such a way that agents are guided by a leader, which follows the evacuation path. The proposed evacuation algorithm is based on Model Predictive Control (MPC) that uses the current and the past information of the system to predict future agents’ behaviors. It can be observed that, with MPC method, the leader-following consensus is obtained faster in comparison to the conventional optimal control technique. The effectiveness of the developed MPC evacuation algorithm with respect to different parameters and different time domains is illustrated by numerical examples.
    Źródło:
    Archives of Control Sciences; 2021, 31, 3; 629-644
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evacuation by leader-follower model with bounded confidence and predictive mechanisms
    Autorzy:
    Almeida, Ricardo
    Girejko, Ewa
    Machado, Luis
    Malinowska, Agnieszka B.
    Martins, Natália
    Powiązania:
    https://bibliotekanauki.pl/articles/1845527.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multi-agent systems
    emergency
    model predictive control
    bounded confidence
    Opis:
    This paper studies an evacuation problem described by a leader-follower model with bounded confidence under predictive mechanisms. We design a control strategy in such a way that agents are guided by a leader, which follows the evacuation path. The proposed evacuation algorithm is based on Model Predictive Control (MPC) that uses the current and the past information of the system to predict future agents’ behaviors. It can be observed that, with MPC method, the leader-following consensus is obtained faster in comparison to the conventional optimal control technique. The effectiveness of the developed MPC evacuation algorithm with respect to different parameters and different time domains is illustrated by numerical examples.
    Źródło:
    Archives of Control Sciences; 2021, 31, 3; 629-644
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Restructuring picking and restocking processes on a hypermarket
    Autorzy:
    Guimarães, Rafaela
    Almeida, Luís
    Barros, Marta
    Afecto, Maria Carlota
    Figueira, Maria L.
    Mota, Diana
    Galvão, Márcia
    Barreira, Mariana
    Lima, Rui M.
    Powiązania:
    https://bibliotekanauki.pl/articles/23966575.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    usługi Lean
    gospodarka magazynowa
    uzupełnianie zapasów
    hipermarket
    lean services
    hypermarket
    picking
    restocking
    warehouse management
    Opis:
    The purpose of this paper is to identify challenges and opportunities for exploring Lean approaches in managing instore logistics processes of a hypermarket, wherein data collection made to quantify the state of the system, methods, and instruments will be applied to improve picking and restocking processes between the two main stock areas, the store and the warehouse. This article reports on a case study work, comprising direct observation, and analysis of the data collected, which was developed in three main phases: identification and characterization of problems, improvements in management of stock and restocking information, and finally improvements in the picking and restoking processes and teams. After analysing the hypermarket, some problems were found such as a high percentage of non-productive time in restocking, a daily average of 132 products to be restocked, a lack of standardization of tasks in the warehouse, and outdated restocking management system. Therefore, there will be some proposals to change the restocking management system, the picking and restocking work method and the warehouse layout, which makes it possible to decrease stock breaks in the store by 17%, the number of employees dedicated to these processes from 14 to 11, and finally, to reduce 2 daily hours of non-adding value time. This work makes an innovative contribution to fulfil a lack of publications dedicated to hyper-market inbound logistics between the warehouse and the store. Thus, it reveals the significant importance of focusing on instore logistics to the point of sale, concerning the efficiency, the lean production, and social benefits to the retail hypermarket, from the reception of products in the hypermarket warehouse until they are placed on the store shelves.
    Źródło:
    Production Engineering Archives; 2022, 28, 1; 64--72
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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