5 research outputs found

    Динамика частотного реверса асинхронного двигателя

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    Для исследования реверсирования асинхронного двигателя сравниваются два способа частотной и противовключением. Анализируются различные законы изменения частоты статора и их влияние на быстродействие, пульсации момента, плавность

    Extraction of the gluon density of the proton at small xx

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    The gluon momentum density xg(x,Q2)x_g ( x , Q^2 ) of the proton was extracted at Q2=20Q^2 = 20 GeV2^2 for small values of xx between 4×1044 \times 10^{−4} and 10210^{−2} from the scaling violations of the proton structure function F2F_2 measured recently by ZEUS in deep inelastic neutral current ep scattering at HERA. The extraction was performed in two ways. Firstly, using a global NLO fit to the ZEUS data on F2F_2 at low xx constrained by measurements from NMC at larger xx; and secondly using published approximate methods for the solution of the GLAP QCD evolution equations. Consistent results are obtained. A substantial increase of the gluon density is found at small xx in comparison with the NMC result obtained at larger values of xx

    EXTRACTION OF THE GLUON DENSITY OF THE PROTON AT X

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    The gluon momentum density xg(x, Q2) of the proton was extracted at Q2 = 20 GeV2 for small values of x between 4 × 10-4 and 10-2 from the scaling violations of the proton structure function F2 measured recently by ZEUS in deep inelastic neutral current ep scattering at HERA. The extraction was performed in two ways. Firstly, using a global NLO fit to the ZEUS data on F2 at low x constrained by measurementsfrom NMC at larger x; and secondly using published approximate methods for the solution of the GLAP QCD evolution equations. Consistent results are obtained. A substantial increase of the gluon density is found at small x in comparison with the NMC result obtained at larger values of x. © 1995

    Measurement of the proton structure function F2 in e p scattering at HERA

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    This paper presents our first measurement of the F2 structure function in neutral-current, deep inelastic scattering using the ZEUS detector at HERA, the ep colliding beam facility at DESY. The data correspond to an integrated luminosity of 24.7 nb-1. Results are presented for data in range of Q2 from 10 GeV2 to 4700 GeV2 and Bjorken x down to 3.0 7 10-4. The F2 structure function increases rapidly as x decreases

    Measurement of the proton structure function F2F_2 from the 1993 HERA data

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    The ZEUS detector has been used to measure the proton structure function F2F_2. During 1993 HERA collided 26.7 GeV electrons on 820 GeV protons. The data sample corresponds to an integrated luminosity of 0.54 pb1^{−1}, representing a twenty fold increase in statistics compared to that of 1992. Results are presented for 7<Q2<1047<Q^2<104 GeV2^2 and xx values as low as 3×104^{−4}. The rapid rise in F2F_2 as xx decreases observed previously is now studied in greater detail and persists for Q2Q^2 values up to 500 GeV2^{2}
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