نتایج جستجو برای: structure with constant cross section subjected to el
تعداد نتایج: 13772071 فیلتر نتایج به سال:
power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...
abstract biometric access control is an automatic system that intelligently provides the access of special actions to predefined individuals. it may use one or more unique features of humans, like fingerprint, iris, gesture, 2d and 3d face images. 2d face image is one of the important features with useful and reliable information for recognition of individuals and systems based on this ...
We calculate the contribution arising from nonperturbative quark-gluon chromomagnetic interaction to the high energy total quark-quark cross section and to gluon distributions in nucleon. The estimation obtained within the instanton model of QCD vacuum leads to the conclusion that this type of interaction gives the dominating contribution to the pomeron coupling with the light quarks and to glu...
The scattering of two off-shell photons is an infrared-safe process in QCD. For photon virtualities Q in the range of a few GeV, accessible at LEPII, powerbehaved contributions in (ΛQCD/Q) n to the total cross section may become non-negligible. Based on a dispersion relation for the running coupling, we discuss these contributions and calculate the coefficients of the leading power correction f...
Article history: Received 7 July 2013 Received in revised form 20 November 2013 Accepted 2 December 2013 Available online 6 December 2013 Editor: M. Doser
We reevaluate the hadronic part of the electromagnetic vacuum expectation value using the standard dispersion integral approach that utilizes the hadronic cross section measured in e + e − experiments as input. Previous analyses are based upon point-by-point trapezoidal integration which does not treat experimental errors in an optimal way. We use a technique that weights the experimental input...
Article history: Received 7 July 2013 Received in revised form 20 November 2013 Accepted 2 December 2013 Available online 6 December 2013 Editor: M. Doser
Article history: Received 7 July 2013 Received in revised form 20 November 2013 Accepted 2 December 2013 Available online 6 December 2013 Editor: M. Doser
The production of D* and D mesons has been studied in e+e annihilations at x/~=29 GeV. The data, corresponding to an integrated luminosity of 300 pb~, were obtained using the HRS detector at PEP. The cross section is measured to be R (D o + D + ) = 2.40 + 0.35 and we determine the electroweak asymmetry to be 9.9 + 2.7%, which corresponds to an axial vector coupling constant product g~gC = 0.26 ...
abstract abstract of thesis (includes summary, goals, execution methods, and results) story “al-obnosat al-bayza” is one of the short stories from “hanna mineh” collection. this story is a selection of lives of some humans during a voyage together, each of them is a symbol of human nature (love, mind, kindness) and examine social, cultural, and political aspects of governing system, and it...
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