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A number of azoloquinazolines has been efficiently synthesized in the cyclocondensation reaction of azoloazines with α,β-unsaturated carbonyl compounds activated with ultrasound. Two main advantages of the suggested procedure are shorter reaction time and higher yields compared to reflux and stirring at room temperatures. In addition, the yields of dehydrogenization products were decreased.
The problem on excitation of field by relativistic charge in semi-infinite dielectric waveguide has been solved previously. There the appearance of rear front of wake wave was predicted and asymptotic field expressions were obtained. In this paper we found the exact solution of this problem.
In the present paper the process of excitation of wideband transition radiation during the injection of an electron bunch into a semi-infinite cylindrical dielectric-filled waveguide, which is shorted out by metal wall at the injection side, has been studied theoretically.
The theory of electromagnetic radiation excitation by an electron Bow is considered for a flat magnetically insulated transmission line with a comb anode. The dispersion relation describing the excitation of electromagnetic oscillations by the Brillouin flow in the slow-wave structure is derived. The numerical analysis of dispersion equation has shown that in the presence of the slow-wave structure,...
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