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Wyszukujesz frazę "Srivastava, H." wg kryterium: Autor

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    Wyświetlanie 1-8 z 8
    Tytuł:
    Applications of certain linear operators in the theory of analytic functions
    Autorzy:
    Srivastava, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1312665.pdf
    Data publikacji:
    1991
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    The object of the present paper is to illustrate the usefulness, in the theory of analytic functions, of various linear operators which are defined in terms of (for example) fractional derivatives and fractional integrals, Hadamard product or convolution, and so on.
    Źródło:
    Annales Polonici Mathematici; 1991, 55, 1; 325-330
    0066-2216
    Pojawia się w:
    Annales Polonici Mathematici
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Investigation of Different Diversity Combining Techniques in Cognitive Radio
    Autorzy:
    Agarwal, R.
    Srivastava, N.
    Katiyar, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/309425.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    cognitive radio
    complementary ROC
    post examining selection
    probability of detection
    probability of false alarm
    switch combining
    examine combining
    Opis:
    In this paper, the performance of an energy detector in cognitive radio, using different diversity combining techniques, is evaluated. Among many diversity combining techniques, maximal ratio combining (MRC) gives the best results but at the cost of the highest complexity. To design a simpler receiver, it is suggested to use less complex combining techniques, i.e. switched diversity, which provides one of the least complex solutions to combat fading. The paper analyzes two switched diversity schemes, switch examine combining (SEC), and switch examine combining with post examining selection (SECp). A closed form expression determining the probability of detection using MRC, SEC and SECp is derived for various numbers of branches. Detection performance with different diversity combining techniques is compared and the complexity trade-off is observed.
    Źródło:
    Journal of Telecommunications and Information Technology; 2018, 3; 64-69
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fertility improvement in pea [Pisum sativum L.] autotetraploids - mutation breeding
    Autorzy:
    Kumar, H
    Mercykuty, V.C.
    Srivastava, C.P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048128.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mutation breeding
    micromutation
    fertility improvement
    autotetraploid
    disjunction index
    pea
    Pisum sativum
    seed
    Opis:
    C₂ seeds of autotetraploids (colchicine-induced) of two diverse genotypes, T 163 and 5064-S, of pea (Pisum sativum L.) and their corresponding diploids were irradiated with 10 kR gamma-ray. Autotetraploids showed a high seed-sterility as compared to diploids. Seed fertility increased in M₂ as compared to M₁. Both quadrivalent and bivalent frequencies decreased in the M₁ generation of autotetraploids in relation to their respective controls. However, a positive shift in the mean bivalent formation was noted at the cost of other configurations in C₃-M₂ with respect to C₂-M₁ and varied with the genotype. In the M₂ generation of autotetraploids, the variability was relatively higher for the number of pods per plant and seed yield per plant. Although the mean values for pods per plant, number of seeds per pod and seed yield per plant remained more or less parallel in autotetraploids in M₁ and M₂ generations, there was an increase in the upper range limit probably due to micromutation for these characters in M₂.
    Źródło:
    Journal of Applied Genetics; 1995, 36, 1; 43-48
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Economically viable synthesis of Fe3O4 nanoparticles and their characterization
    Autorzy:
    Srivastava, V.
    Singh, P. K.
    Weng, C. H.
    Sharma, Y. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/778707.pdf
    Data publikacji:
    2011
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    nanożelazo
    żelazo
    synteza
    współstrącanie
    charakterystyka
    pH zpc
    nano iron
    synthesis
    coprecipitation
    characterization
    Opis:
    Nano iron oxide particles (Fe3O4) were synthesized by coprecipitation of Fe2+ and Fe3+ by ammonia solution in the aqueous phase. Various instrumentation methods such as X ray Diffractometry (XRD), Transmission Electron Microscopy (TEM), Fourier Transform Infrared (FTIR) spectroscopy, Brunauer-Emmett-Teller (BET) and Vibrating Sample Magnetometery (VSM) were used to characterize the properties of nanoparticles. The size of the nanoparticles was measured and was found to be between 10 to 15 nm. The value of saturation magnetization of the nanoparticles was found to be 55.26 emu/g. The BET surface area of nano iron oxide particles measured to be 86.55 m2/g.
    Źródło:
    Polish Journal of Chemical Technology; 2011, 13, 2; 1-5
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Leaching of Al-Based Polygrain Quasicrystalline and Related Crystalline Surfaces
    Autorzy:
    Yadav, T.
    Mishra, S.
    Pandey, S.
    Singh, D.
    Lowe, M.
    Tamura, R.
    Mukhopadhyay, N.
    Srivastava, O.
    McGrath, R.
    Sharma, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1373698.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.44.Br
    81.16.Hc
    61.66.Dk
    68.37.Hk
    Opis:
    In the present investigation, we have studied leaching on polygrain Al-based quasicrystalline $(i-Al_{63}Cu_{25}Fe_{12})$ as well as crystalline (B2 phase; $Al_{55}Cu_{30}Fe_{15})$ alloy surfaces using a 10 mole NaOH solution. The surface was leached at varying times from 30 min to 8 h and subsequently characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray analysis. Leaching of the samples for 30 min generated a homogeneous layer. However further leaching for 1-8 h yielded nano-size particles on the surface. Spherical microstructure has been observed on the Al-Cu-Fe crystalline surface whereas on the quasicrystalline surface a petal-like microstructure appeared. The implications of the evolution of different microstructures in the context of structure, stability and activity are discussed. The results are compared with the microstructure of leached polygrained samples containing a mixture of different surface orientations.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 2; 629-632
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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