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Wyświetlanie 1-2 z 2
Tytuł:
Application of multi-objective fruit fly optimisation algorithm based on population Manhattan distance in distribution network reconfiguration
Autorzy:
Tang, Minan
Zhang, Kaiyue
Wang, Qianqian
Cheng, Haipeng
Yang, Shangmei
Du, Hanxiao
Powiązania:
https://bibliotekanauki.pl/articles/1841286.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Chebyshev chaotic mapping
distributed generation
distribution network reconfiguration
fuzzy decision method
Pareto optimal
pmdMOFOA
population Manhattan distance
Opis:
In order to optimise the operation state of the distribution network in the presence of distributed generation (DG), to reduce network loss, balance load and improve power quality in the distribution system, a multi-objective fruit fly optimisation algorithm based on population Manhattan distance (pmdMOFOA) is presented. Firstly, the global and local exploration abilities of a fruit fly optimisation algorithm (FOA) are balanced by combining population Manhattan distance (PMD) and the dynamic step adjustment strategy to solve the problems of its weak local exploration ability and proneness to premature convergence. At the same time, Chebyshev chaotic mapping is introduced during position update of the fruit fly population to improve ability of fruit flies to escape the local optimum and avoid premature convergence. In addition, the external archive selection strategy is introduced to select the best individual in history to save in external archives according to the dominant relationship amongst individuals. The leader selection strategy, external archive update and maintenance strategy are proposed to generate a Pareto optimal solution set iteratively. Lastly, an optimal reconstruction scheme is determined by the fuzzy decision method. Compared with the standard FOA, the average convergence algebra of a pmdMOFOA is reduced by 44.58%. The distribution performance of non-dominated solutions of a pmdMOFOA, MOFOA, NSGA-III and MOPSO on the Pareto front is tested, and the results show that the pmdMOFOA has better diversity. Through the simulation and analysis of a typical IEEE 33-bus system with DG, load balance and voltage offset after reconfiguration are increased by 23.77% and 40.58%, respectively, and network loss is reduced by 57.22%, which verifies the effectiveness and efficiency of the proposed method.
Źródło:
Archives of Electrical Engineering; 2021, 70, 2; 307-323
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Communist Party of the United States of America since 1919
Autorzy:
Radzilowsky, John
Powiązania:
https://bibliotekanauki.pl/articles/477272.pdf
Data publikacji:
2018
Wydawca:
Instytut Pamięci Narodowej, Komisja Ścigania Zbrodni przeciwko Narodowi Polskiemu
Tematy:
Communist Party of the United States of America (CPUSA)
Earl Browder
anti-communism
Harvey Klehr
John Earl Haynes
Manhattan Project
espionage
Opis:
The Communist Party of the United States of America (CPUSA) was the most influential communist party in the Western Hemisphere until the 1950s. Although it never had a mass membership, it gained the allegiance of many influential political and cultural figures. Its membership consisted of Anglo-Saxons as well as immigrants and children of immigrants from eastern and southern Europe. The CPUSA played a controversial role in American political history in the 1940s, 1950s, and 1960s when attempts by anti-communists to discredit the party as an arm of the Soviet Union backfired. Scholarship on the CPUSA is deeply divided as a result of these political controversies. Traditional scholarship emphasized the CPUSA as an indigenous development with limited ties to the Soviet Union. This school lauded the CPUSA for its apparent support of civil rights, unions, and racial equality. A revisionist approach emphasized the party’s ties to Moscow and viewed it as dedicated to supporting a foreign totalitarian regime. Since 1991, the release of many secret CPUSA documents has strongly supported the revisionist school, demonstrating that the party followed closely the political and operational directives of Soviet security services and was deeply involved in assisting Soviet espionage and acted as an agent of influence for the USSR.
Źródło:
Pamięć i Sprawiedliwość; 2018, 32; 15-26
1427-7476
Pojawia się w:
Pamięć i Sprawiedliwość
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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