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    Wyświetlanie 1-5 z 5
    Tytuł:
    Editorial : systems and operational research for modelling and decision making : a perspective from BOS conferences
    Autorzy:
    Owsiński, J. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/406548.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Źródło:
    Operations Research and Decisions; 2013, 23, 2; 5-9
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New developments in fuzzy clustering with emphasis on special types of tasks
    Autorzy:
    Viattchenin, D. A.
    Owsiński, J. W.
    Kacprzyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/206677.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    clustering
    fuzzy sets
    possibilistic clustering
    inference
    three-way clustering
    feature selection
    Opis:
    The paper is devoted to a survey of work done in fuzzy clustering, mainly during the first decade of the 21st century, and that with emphasis on various approachesto the problem, as well as various formulations of the very problem. That is why not only the classical formulations are treated, but several other problems, related to (the use of) clustering, like feature selection, inference systems, three-way clustering, and, on the other hand, such formulations of clustering as the possibilistic one or the one involving intuitionistic fuzzy sets. These are treated as the background for presentation of some specific ideas of the main author, concerning definite heuristic algorithms for effective solving of some of these problems.
    Źródło:
    Control and Cybernetics; 2018, 47, 2; 115-130
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identifying main center access hubs in a city using capacity and time criteria. The evolutionary approach
    Autorzy:
    Owsiński, J. W.
    Stańczak, J.
    Barski, A.
    Sęp, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/205927.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    transport
    urban transport system
    Hub and Spoke
    Park and Ride
    evolutionary algorithm
    Opis:
    In this paper we consider the well known Hub and Spoke problem, analyzed in the context of Warsaw Public Transport System. Our method was designed for data preprocessing so as to allow using a timetable obtained from the public transport web site after conversion into the required data format. A dedicated evolutionary algorithm method that detects the hubs of almost all available transport means was also developed. The hubs identified are well connected to the center of the city and to other identified hubs (characterized by high capacity or short travel time). These hubs may become the skeleton of the public transport system and, in particular, good points for locating Park and Ride facilities.
    Źródło:
    Control and Cybernetics; 2016, 45, 2; 207-223
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolutionary approach for obtaining the hub and spoke structure in the logistic network
    Autorzy:
    Mażbic-Kulma, B.
    Stańczak, J.
    Owsiński, J. W.
    Sęp, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/343812.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    kernel and shell
    hub and spoke
    logistic network
    evolutionary algorithm
    Opis:
    In order to describe transportation system, as a routine a connection graph would be used. Vertices of the graph can be train stations, bus stop, airports etc. The edges show direct connections between vertices. A direct application of such graph can be difficult and computational problems can occur while one would try to organize or optimize such a transportation system. Therefore, a method of aggregation of such graph was introduced, using the general kernel and shell structure and a hub and spoke transformation method of the source graph. These structures allow to concentrate and order the transport of goods/persons among vertices and enable to reduce the number of analyzed vertices as well as edges of the graph. In the presented paper we continue our work on kernel and shell and its instance hub and spoke methods of connection graph transformation. In this paper we develop model of the transportation system using the hub and spoke method with predetermined, minimum and indirectly described numbers of hub nodes. To obtain the desired structures, several versions of specialized evolutionary algorithm (EA) were developed and applied.
    Źródło:
    Total Logistic Management; 2011, 4; 89-105
    1689-5959
    Pojawia się w:
    Total Logistic Management
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The kernel and shell structure as a tool for improving the graph of transportation connections
    Autorzy:
    Mażbic-Kulma, B.
    Owsiński, J. W.
    Sęp, K.
    Stańczak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/406561.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    transport
    connections graph
    hub and spoke
    kernel and shell
    α-clique
    genetic algorithm
    Opis:
    A model of a transportation system is expected to be useful in simulations of a real system to solve given transportation tasks. A connection graph is routinely used to describe a transportation system. Vertices can be train stations, bus stops, airports etc. The edges show direct connections between vertices. A direct approach can be difficult and computational problems can arise in attempts to organize or optimize such a transportation system. Therefore, a method for aggregating such graphs was introduced, using a general kernel and shell structure and its particular instances: α-clique structured graphs of connections and a hub and spoke transformation of the source graph. These structures enable the concentration and ordering of transport between vertices and reduction of the analyzed graph. To obtain the desired structures, several versions of a specialized evolutionary algorithm were developed and applied.
    Źródło:
    Operations Research and Decisions; 2013, 23, 2; 91-105
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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