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Wyszukujesz frazę "Djordjević, S." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Weyls theorems and continuity of spectra in the class of p-hyponormal operators
Autorzy:
Djordjević, S.
Duggal, B.
Powiązania:
https://bibliotekanauki.pl/articles/1205933.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
p-hyponormal operators
Weyl's theorem
continuity of spectra
Opis:
We show that p-hyponormal operators obey Weyl's and a-Weyl's theorem. Also, we show that the spectrum, Weyl spectrum, Browder spectrum and approximate point spectrum are continuous functions in the class of all p-hyponormal operators.
Źródło:
Studia Mathematica; 2000, 143, 1; 23-32
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges for nurse rostering problem and opportunities in hospital logistics
Autorzy:
Simić, D.
Simić, S.
Milutinović, D.
Djordjević, J.
Powiązania:
https://bibliotekanauki.pl/articles/333351.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
nurse rostering problem
scheduling
healthcare
metaheuristics
logistic approach
problem dyżurów pielęgniarskich
harmonogram
opieka zdrowotna
metaheurystyka
podejście logistyczne
Opis:
In the last 45 years nurse scheduling has received considerable attention in the research community. Nurse rostering can be described as a task of finding a duty roster for a set of nurses in such a way that the rosters comply with work regulations and meet the management’s requests. The objective varies from minimizing the costs of float nurses or minimizing under-staffing to maximizing the degree to which the nurses’ requests are met. In logistics, one aspect is optimization of the steady flow of materials through a network of transport links and storage nodes, and the other is, coordination of a sequence of resources, such as staffing and scheduling clinical resources. The period up to 2000 is characterized by using mathematical programming and objective functions to solve nurse rostering problem. In the period after 2000 the focus of researches aimed at solving nurse rostering and scheduling problem becomes implementation of meta-heuristics and multi-objective functions. The aim of this paper is to present the latest researches conducted in last ten years.
Źródło:
Journal of Medical Informatics & Technologies; 2014, 23; 195-202
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reparation of damaged forging dies by hard facing (HF) technology
Autorzy:
Lazic, V.
Arsic, D.
Nikolic, R. R.
Aleksandrovic, S.
Milosavljevic, D.
Djordjevic, M.
Cukic, R.
Powiązania:
https://bibliotekanauki.pl/articles/111606.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
forging dies
hard facing (HF)
filler metals (FM)
hardness
microstructure
matryce kuźnicze
napawanie
spoiwa
twardość
mikrostruktura
Opis:
The forging dies are in exploitation exposed to elevated temperatures and variable impact loads, both compressive and shear. Steels for manufacturing of these tools must endure those loads while maintaining mechanical properties and being resistant to wear and thermal fatigue. For those reasons, the alloyed steels are used for making the forging dies, though they have less weldability, because alloying increases proneness to hardening. Any reparatory hard facing (HF) of the damaged dies would require the specially adjusted technology to the particular piece. In this paper reparatory hard facing of dies used for forging pieces in the automobile industry is considered. Prior to reparatory hard facing of the real tools, numerous experimental hard facings on models were performed. All the model hard facings were done on the same steels which were used for production of the real forging dies. To define the optimal hard facing technology one needs to derive the optimal combination of the adequate heat treatment(s), to select the proper filler metals and the welding procedure. The established optimal HF technology was applied to real forging dies whose service life was further monitored in conditions of exploitation.
Źródło:
Production Engineering Archives; 2015, 6, 1; 26-29
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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