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Wyszukujesz frazę "Castellani, M." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Local cone approximations in optimization
    Autorzy:
    Castellani, M.
    Pappalardo, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/970281.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    nonsmooth optimization
    cone approximations
    generalized directional epiderivatives
    optimality conditions
    constraint qualifications
    mean value theorem
    error bound
    Opis:
    We show how to use intensively local cone approximations to obtain results in some fields of optimization theory such as optimality conditions, constraint qualifications, mean value theorems and error bound.
    Źródło:
    Control and Cybernetics; 2007, 36, 3; 583-600
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental diagnosis of cavitation for a hydraulic monotube shock absorber
    Autorzy:
    Morettini, G.
    Bartolini, N.
    Astolfi, D.
    Scappaticci, L.
    Becchetti, M.
    Castellani, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/329554.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    shock absorber
    cavitation
    shock transparent
    amortyzator hydrauliczny
    kawitacja
    diagnoza
    Opis:
    Hydraulic shock absorbers are mechanical devices responsible of vibration damping. Although a high level of development and tuning has been carried on, in order to ensure high performance standards in almost every situation, some dynamic phenomenon affecting internal fluid may reduce the damping capacity. In hydraulic shock absorbers, the energy is dissipated forcing the internal fluid through calibrated orifices; this energy is converted in heat and dispersed outwards from the external walls. Hydraulic fluid has therefore a fundamental role for the proper functioning of the overall device, and the most important variations of its chemical-physical properties have to be considered. One of the most dangerous phenomena involving the internal fluid is cavitation, which could affect performances and generate structural damages of the internal components of the damper. The aim of this work is to diagnose the phenomenon of cavitation using experimental data from a prototype of monotube shock absorber equipped with transparent walls and developed for research purposes. The identification of force and displacement parameters is carried out through experimental tests on the prototype, which is a totally adjustable device equipped with pressure and temperature transducers for every chamber. The optical access provided from the transparent wall allows to collect images from a high-speed camera, which could be related to the signals coming from the transducers. This approach is valuable for analyzing the occurrence and the time development of dynamic phenomena of cavitation of the flow or the motion of the main valve blades. Finally, the acquisition of the optical images, coupled with evidences from experimental data, allows to characterize the dynamic events of cavitation, from his onset.
    Źródło:
    Diagnostyka; 2016, 17, 3; 75-80
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new data mining approach for power performance verification of an on-shore wind farm
    Autorzy:
    Castellani, F.
    Garinei, A.
    Terzi, L.
    Astolfi, D.
    Moretti, M.
    Lombardi, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/328750.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    wind energy
    renewable energy
    wind turbine performance
    data mining
    SCADA database
    control systems
    fault diagnosis
    performance optimization
    wind turbine power output
    Opis:
    Monitoring wind energy production is fundamental to improve the performances of a wind farm during the operational phase. In order to perform reliable operational analysis, data mining of all available information spreading out from turbine control systems is required. In this work a SCADA (Supervisory Control And Data Acquisition) data analysis was performed on a small wind farm and new post-processing methods are proposed for condition monitoring of the aerogenerators. Indicators are defined to detect the malfunctioning of a wind turbine and to select meaningful data to investigate the causes of the anomalous behaviour of a turbine. The operating state database is used to collect information about the proper power production of a wind turbine and a number map has been codified for converting the performance analysis problem into a purely numerical one. Statistical analysis on the number map clearly helps in detecting operational anomalies, providing diagnosis for their reasons. The most operationally stressed turbines are systematically detected through the proposal of two Malfunctioning Indices. Results demonstrate that a proper selection of the SCADA data can be very useful to measure the real performances of a wind farm and thus to define optimal repair/replacement and preventive maintenance policies that play a major role in case of energy production.
    Źródło:
    Diagnostyka; 2013, 14, 4; 35-42
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in renal autacoids in aged human hypertensives
    Autorzy:
    Ungar, A.
    Cristofari, C.
    Torrini, M.
    Di Serio, C.
    Cantini, C.
    Vallotti, B.
    La Cava, G.
    Castellani, S.
    Masotti, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/70790.pdf
    Data publikacji:
    2000
    Wydawca:
    Polskie Towarzystwo Fizjologiczne
    Tematy:
    prostaglandin
    renal disease
    man
    renal autacoid
    hypertension
    kidney
    systolic hypertension
    endothelium
    stress condition
    Źródło:
    Journal of Physiology and Pharmacology; 2000, 51, 4,1
    0867-5910
    Pojawia się w:
    Journal of Physiology and Pharmacology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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