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Wyszukujesz frazę "Manoharan, P.S." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Hybrid parametric islanding detection technique for microgrid system
    Autorzy:
    Jayanthi, S.
    Xavier, S. Arockia Edwin
    Manoharan, P.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173549.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    distributed generation
    ESPRIT
    exact signal parametric rotational invariance technique
    microgrid
    battery energy storage system
    islanding
    wytwarzanie rozproszone
    mikrosiatka
    akumulatorowy system magazynowania energii
    zasilanie wyspowe
    Opis:
    In microgrid distribution generation (DG) sources are integrated parallelly for the economic and efficient operation of a power system. This integration of DG sources may cause many challenges in a microgrid. The islanding condition is termed a condition in which the DG sources in the microgrid continue to power the load even when the grid is cut off. This islanding situation must be identified as soon as possible to avoid the collapse of the microgrid. This work presents the hybrid islanding detection technique. This technique consists of both active and parametric estimation methods such as slip mode shift frequency (SMS) and exact signal parametric rotational invariance technique (ESPRIT), respectively. This technique will easily distinguish between islanding and non-islanding events even under very low power perturbations. The proposed method also has no power quality impact. The proposed method is tested with UL741 standard test conditions.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; e140101, 1--8
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applications of FTIR and $\text{}^{57}Fe$ Mössbauer Techniques in Studies of Recently Excavated Indian Archaeological Pottery
    Autorzy:
    Dhanapandian, S.
    Manoharan, C.
    Sutharsan, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1489821.pdf
    Data publikacji:
    2012-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.20.Ea
    82.80.Ej
    07.20.Mc
    75.50.Ww
    Opis:
    The Fourier transform infrared absorption spectra and $\text{}^{57}Fe$ Mössbauer spectra have been recorded at room temperature for the recently excavated archaeological pottery sherds. FTIR spectroscopy is used to estimate the lower limit of firing temperature and firing nature of the pottery sherds, and it is confirmed by the results of the Mössbauer technique results. The results show that the $\text{}^{57}Fe$ Mössbauer and FTIR spectra of few pottery sherds of Perumalpattu and Theriruveli are nearly identical, indicating that they may belong to the same origin. $\text{}^{57}Fe$ Mössbauer spectra of black coloured sherds show the presence of $Fe^{2+}$ ions which confirm the relation between the black colour in pottery and the existence of non-magnetic FeO compound, resulting from the reducing atmospheric condition during firing. FTIR results of reddish pot sherds show the presence of significant amount of $Fe_2O_3//α-Fe_2O_3$, which confirms again the relationship between the state and form of iron present in the pottery and its colour.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 3; 592-598
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biochemical analysis and comparison of superior cabbage genotypes grown in plains and hills of Kerala, India
    Autorzy:
    Elavarasan, K.
    Soundara Rajan, S.
    Manoharan, A.
    Pushpalatha, P.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/11864.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    The present study was undertaken to identify the superior cabbage genotype and to examine their physical yield performance among the four cultivated genotypes namely Namdhari Seeds 183, Namdhari Seeds 160, Namdhari Seeds 35 and Tropical Sun Plus, grown in plains and higher altitude of Kerala. Study revealed that significant differences were observed in yield levels of cabbage and it was ranged from 22.6 – 29.3 kg /16m2 in hills and 1.27 – 22.06 kg /16m2 in plains. Among the cabbage genotypes, NS 183 was found to be the best for hilly region in terms of higher head yield (22.06 Kg /16m2), head weight (729.6 g), head height (11.1 cm) and early maturity. Similarly, Tropical Sun Plus exhibited better performance in plains in terms of higher head yield (22.06 Kg /16m2), head weight (729.6 g) and head height (11.1 cm). The individual genotype which exhibited the superior performance in hills and plains were selected and compared for the general biochemical characters like Moisture content, acidity, ascorbic acid, protein, phosphorus, calcium and potassium. Finally, the study found that, the genotype grown at hill (Tropical Sun Plus) was recorded a higher biochemical characters than genotype grown in plains (Tropical Sun plus). Similarly, hill grown genotype (NS 183) recorded a higher biochemical characters than the plains grown genotype (NS 183).
    Źródło:
    International Letters of Natural Sciences; 2015, 38
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Incorporation of Granite and Marble Rejects in Clay Brick Products: Physico-Mechanical Analysis
    Autorzy:
    Dhanapandian, S.
    Manoharan, C.
    Ramkumar, T.
    Gnanavel, B.
    Sutharsan, P.
    Shanthi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535836.pdf
    Data publikacji:
    2010-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.70.Bt
    28.41.Kw
    76.80.+Y
    61.05.C-
    Opis:
    The objective of this work is to characterize and evaluate the effect of incorporation of granite and marble rejects on the properties and microstructure development of three different clay materials used to fabricate brick materials in the brick industry. The raw materials are characterized with respect to their chemical composition by X-ray fluorescence, particle size distribution and mineralogical composition by X-ray diffraction and plasticity. Compositions have been prepared with additions of 0, 10, 20, 30, 40 and 50 wt% reject in three different clay material from Tamilnadu State, India, and fired at temperatures from 500 to 900°C in laboratory furnace. The behaviour of mixtures containing 80 wt% clay material + 20 wt% reject is discussed in detail. The technological properties of briquette specimens such as flexural rupture strength, water absorption, porosity and bulk density were determined. The microstructure of the fired briquette specimens were observed by scanning electron microscopy with energy dispersive X-ray spectrometry, Mössbauer spectroscopy. The results of the above studies show that incorporations of granite and marble rejects up to 50 wt% is potential to the industrial clay brick products, with no major sacrifice on the properties of the final product, anticipating no costly modifications in the industrial production line.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 4; 688-695
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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