نتایج جستجو برای: radiators
تعداد نتایج: 579 فیلتر نتایج به سال:
-For high frequency and VHF point-to-point communication, the V-antenna reflector and the V-shaped antenna array are useful because of high gain, low cost, easy manoeuvering and simple geometry. The theoretical analysis for the radiation characteristics of a plane, twodimensional, V-shaped antenna array have been presented taking into account the mutual inductive coupling effect among the radia...
The Dirc, a new type of Cherenkov imaging device, has been selected as the primary particle identi cation system for the BaBar detector at the asymmetric B-factory, Pep-II. It is based on total internal re ection and uses long, rectangular bars made from synthetic fused silica as Cherenkov radiators and light guides. In this paper, the principles of the Dirc ring imaging Cherenkov technique are...
Analytical relations, describing the electrical fields of cylindrical piezoceramic radiators with circular polarization as a member systems baffle in inner cavity, using related method multiply connected regions were obtained. Comparative analysis results numerical experiments performed on frequency characteristics electric field radiating for different modes radiation allow to establish number...
In this study, effect of adding in SiO2 nanoparticle in base fluid (water) in car radiator is investigated experimentally. Radiators are compact heat exchangers that optimized and evaluated by considering different working conditions. Car\'s cooling system, plays an important role in vehicle\'s performance, consists of two main parts, known as radiator and fan. Radiators are compact heat exchan...
The Dirc, a new type of Cherenkov imaging device, has been selected as the primary particle identification system for the BaBar detector at the asymmetric B-factory, Pep-II. It is based on total internal reflection and uses long, rectangular bars made from synthetic fused silica as Cherenkov radiators and light guides. In this paper, the principles of the Dirc ring imaging Cherenkov technique a...
The injection of a seed in a free-electron laser (FEL) amplifier reduces the saturation length and improves the longitudinal coherence. A cascaded FEL, operating in the high-gain harmonic-generation regime, allows us to extend the beneficial effects of the seed to shorter wavelengths. We report on the first operation of a high-gain harmonic-generation free-electron laser, seeded with harmonics ...
Very thin and small (45 mm x 35 mm x 0.35 mm) piezoelectric radiators have been developed in this research. The system is modeled by using the energy method in conjunction with the assumed-modes method. Electrical system, mechanical system, and acoustic loading have all been accounted for during the modeling stage. On the basis of the simulation model, the genetic algorithm (GA) is employed to ...
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