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Wyszukujesz frazę "Ionescu, C." wg kryterium: Autor

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Fractional order based velocity control system for a nanorobot in non-Newtonian fluids
    Autorzy:
    Muresan, C. I.
    Birs, I. R.
    Folea, S.
    Ionescu, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/200089.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    non-Newtonian fluids
    drag force
    velocity control
    fractional calculus
    płyny nienewtonowskie
    kontrola prędkości
    rachunek ułamkowy
    Opis:
    Customized patient drug delivery overcomes classic medicine setbacks such as side effects, improper drug absorption or slow action. Nanorobots can be successfully used for targeted patient-specific drug administration, but they must be reliable in the entire circulatory system environment. This paper analyzes the possibility of fractional order control applied to the nanomedicine field. The parameters of a fractional order proportional integral controller are determined with the purpose of controlling the velocity of the nanorobot in non-Newtonian fluids envisioning the blood flow in the circulatory system.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 6; 991-997
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination Of Gas Mixture Components Using Fluctuation Enhanced Sensing And The LS-SVM Regression Algorithm
    Autorzy:
    Lentka, Ł.
    Smulko, J. M.
    Ionescu, R.
    Granqvist, C. G.
    Kish, L. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/221708.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    LS-SVM algorithm
    resistance gas sensor
    fluctuation enhanced sensing
    gas detection
    Opis:
    This paper analyses the effectiveness of determining gas concentrations by using a prototype WO3 resistive gas sensor together with fluctuation enhanced sensing. We have earlier demonstrated that this method can determine the composition of a gas mixture by using only a single sensor. In the present study, we apply Least-Squares Support-Vector-Machine-based (LS-SVM-based) nonlinear regression to determine the gas concentration of each constituent in a mixture. We confirmed that the accuracy of the estimated gas concentration could be significantly improved by applying temperature change and ultraviolet irradiation of the WO3 layer. Fluctuation-enhanced sensing allowed us to predict the concentration of both component gases.
    Źródło:
    Metrology and Measurement Systems; 2015, 22, 3; 341-350
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hands-on MPC tuning for industrial applications
    Autorzy:
    Ionescu, C.
    Copot, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/200293.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    step response
    first order plus dead time
    predictive control
    hands-on tuning
    model based control
    model uncertainty
    robustness
    control education
    plant operator
    Opis:
    This paper proposes a practical tuning of closed loops with model based predictive control. The data assumed to be known from the process is the result of the bump test commonly applied in industry and known in engineering as step response data. A simplified context is assumed such that no prior know-how is required from the plant operator. The relevance of this assumption is very realistic in the context of first time users, both for industrial operators and as educational competence of first hand student training. A first order plus dead time is approximated and the controller parameters immediately follow by heuristic rules. Analysis has been performed in simulation on representative dynamics with guidelines for the various types of processes. Three single-input-single-output experimental setups have been used with no expert users available in different locations – both educational and industrial – these setups are representative for practical cases: a variable time delay dominant system, a non-minimum phase system and an open loop unstable system. Furthermore, in a multivariable control context, a train of separation columns has been tested for control in simulation, followed by experimental tests on a laboratory system with similar dynamics, i.e. a sextuple coupled water tank system. The results indicate the proposed methodology is suitable for hands-on tuning of predictive control loops with some limitations on performance and multivariable process control.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 5; 925-945
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some challenging feedback-control applications in biomedical systems
    Autorzy:
    Ionescu, C.
    Keyser, R. de
    Powiązania:
    https://bibliotekanauki.pl/articles/333855.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    sterowanie adaptacyjne
    sterowanie predykcyjne
    ograniczenia
    funkcjonalna stymulacja elektryczna
    mięsień
    cukrzyca typu 1
    adaptive control
    predictive control
    constraints
    functional electrical stimulation
    muscle
    type I diabetes
    Opis:
    Natural biological control involves the normal functioning of the living organism (i.e. human body) to regulate its parameters such that the vital functions are kept within the normal operating range. When this natural control fails, the biological feedback (thus a closed loop system) is unstable and/or operates under non-optimal conditions of the vital capacity of the subject. In this context, ensuring surviving capacity of the subject implies to artificially control the vital functions presenting the functional failure. Nowadays technology enables development of artificial closed loop devices to correct and provide the normal functions of the organism, replacing thus the damaged/non-optimal parts or helping in recovering their natural properties (rehabilitation techniques). Two of the most en-vogue applications of artificial control will exemplify the importance and the posed challenges: - a neuroprothesis device to control paralyzed skeletal muscles; this enables rehabilitation of drop-foot or hand-grasp movements with paretic or paralyzed skeletal muscles by use of a self-adaptive (auto-tuning) control strategy; - and an artificial pancreas for diabetes type I patients; the blood glucose control in diabetic patients type I is made by use of an in-house developed model-based predictive control algorithm in which input (insulin rate) and output (glucose level) are constrained.
    Źródło:
    Journal of Medical Informatics & Technologies; 2005, 9; 35-46
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mineralogy of the ceramic slags from the Bronze Age funerary site at Lăpuş (NW Romania)
    Autorzy:
    Hoeck, V.
    Ionescu, C.
    Metzner-Nebelsick, C.
    Nebelsick, L. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060612.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Romania
    Bronze Age
    electron microprobe analysis
    ceramic slag
    glass
    Opis:
    A Bronze Age (13–12 th century B.C.) necropolis and cult area in Lăpuş (NW Romania) has been studied. The mound investigated during the present campaign covered a multi-phased wooden cult building containing bronze objects, ceramic potshards and slag pieces. The latter have a mammillary smooth surface, irregular shape and a high porosity. Optical microscopy reveals a colourless to brown vitreous mass, full with various-sized pores making up to 40 vol.% of the total slag. The glass includes relic phases, e.g., quartz, partly melted plagioclase and rutile, rare zircon, ilmenite and magnetite-rich spinel. Cristobalite and various silicates were formed within the glass and at the wall of the vesicles during cooling. The latter include fayalite, ferrosilite, magnetite-dominated spinel, hematite, clinopyroxene, mullite and cordierite. About 1/3 of the total volume of the slag consists of glass with a wide variety of SiO2 ranging from 49 to 76 wt.%. It is inhomogeneous, with local enrichment in Fe, Ca, Mg, Ti and K. The pore structure, the partial melting of plagioclase and rutile, the newly formed SiO2 polymorphs (cristobalite) and the Fe(Al) silicates indicate, all indicate maximum temperatures of 1100–1200°C for the fire generating the slags. The slags are not related to any metallurgical but to an anthropogenic pyrometamorphic process and formed as a result of overfiring some ceramic vessels which may have contained ritual offerings. Intentionally initiated firing of the wooden structures is the most likely the agent of this high temperature. The slags resemble buchites and can be termed “ceramic slags”
    Źródło:
    Geological Quarterly; 2012, 56, 4; 649--664
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Early Eocene age of a sandstone from the Buntmergel Formation (Gresten Klippen Zone, Lower Austria)
    Autorzy:
    Gasiński, M. A.
    Hoeck, V.
    Ślączka, A.
    Ionescu, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060483.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Gresten Klippen Zone
    Eocene
    planktonic foraminiferids
    Lower Austria
    Opis:
    The Gresten Klippen Zone is an individual geological unit, mainly outcropping at the northern rim of the Northern Calcareous Alps. It is best exposed between the Enns Valley in the west and the Vienna Forest in the east. It contains a rock sequence ranging from Early Jurassic to Early Cretaceous, including sandstones, various limestones, breccias and radiolarites. The late Early Cretaceous–Paleogene is represented by the Buntmergel Formation. A sandstone block from the latter yields well-preserved planktonic foraminiferids which allow an assignment to the Early Eocene (E-7 Zone). The low density currents which deposited the parallel laminated sandstones originated in the lower shelf-middle slope.
    Źródło:
    Geological Quarterly; 2012, 56, 4; 845--852
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on the effect of an androgenic hormone product on the functional status of common sebaceous glands in dogs
    Autorzy:
    Gâjâilă, G.
    Ghiță, M.
    Zagrai, G.
    Cotor, D.C.
    Ionescu, A.M.
    Zagrai (Măierean), A.M.
    Damian, A.
    Cotor, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539314.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    sebaceous glands
    sebum
    pH
    androgenic hormone
    Opis:
    Nowadays, a high incidence of cutaneous tumors is observed in domestic carnivorous in pet clinic, the sebaceous glands being the starting point for the development of these tumors. The hormonal imbalances are considered to be the most common etiology for these tumors, so the current research is based on the effects of an androgenic like hormonal drug on the functionality of the sebaceous glands in dogs. For this purpose, 32 dogs were distributed in 4 groups: control group 1 (8 dogs - females), control group 2 (8 dogs - males), experimental group 1 (8 dogs - females) and experimental group 2 (8 dogs - males). The investigation targeted the pH of skin and the rate of sebum’s secretion. The animals from the experimental groups were treated with Anabolin forte for 2 days at a dose of 1 mg/kg body weight/day, intramuscular. The obtained results revealed that administration of Anabolin forte in males induced a significantly distinct intensification (with 10.66%) of sebum’s secretion and a significant decrease of pH of the skin (with 17.1%) compared to the animals from the control group. The administration of Anabolin forte in females induced a significantly distinct intensification (with 17.47%) of sebum’s secretion and a significant decrease of the pH of the skin (with 14.32%) compared to the animals from the control group.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 3; 397-402
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The evolution of some blood parameters in hypovolemia conditions in rabbits
    Autorzy:
    Cotor, G.
    Zagrai, G.
    Gâjâilă, G.
    Ghiță, M.
    Ionescu, A.M.
    Damian, A.
    Zagrai (Măierean), A.M.
    Dragosloveanu, Ș.
    Cotor, D.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087152.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    blood parameters
    hematology
    hypovolemia
    rabbits
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 4; 589-594
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Les changements morphologiques et biochiniques dusang des oiseaux a la suite du tratement avec Emulpan et Neguvon
    Morfologiczne i biochemiczne zmiany we krwi u ptaków po leczeniu Neguvonem i Emulpanem
    The morfologic and biochemic changes in blood of birds after treatment with Neguvon and Emulpan
    Morfologicheskie i biokhimicheskie izmenenija v krovi u ptic posle lechenija Nehguvonom i Ehmulpanom
    Autorzy:
    Badescu, C.
    Ionescu, A.
    Caprarin, A.
    Hrisanidi, S.
    Vasilescu, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2177015.pdf
    Data publikacji:
    1972
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Wiadomości Parazytologiczne; 1972, 18, 4-5-6; 687-695
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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