نتایج جستجو برای: microwave energy
تعداد نتایج: 711538 فیلتر نتایج به سال:
In this paper, we study the potential benefits of using relatively broadband wireless power transmission WPT strategies in both weak-signal and multipath environments where traditional narrowband strategies can be very inefficient. The paper is primarily a theoretical and analytical treatment of the problem that attempts to derive results that are widely applicable to many different WPT applica...
For the first time, measurements of the cosmic microwave background radiation (CMB) alone favor cosmologies with w = -1 dark energy over models without dark energy at a 3.2-sigma level. We demonstrate this by combining the CMB lensing deflection power spectrum from the Atacama Cosmology Telescope with temperature and polarization power spectra from the Wilkinson Microwave Anisotropy Probe. The ...
We use precision microwave spectroscopy of magnetically trapped, ultra-cold Rb to characterize intraand inter-state density correlations. The cold collision shifts for both normal and condensed clouds are measured. The results verify the presence of the sometimes controversial “factors of two”, in normal-cloud mean-field energies, both within a particular state and between two distinct spin spe...
The HEGRA CT-System was used to search for TeV gammarays from the microquasar and supernova remnant combination SS433/W50 over the 1998 and 1999 observing seasons, resulting in about 20 hours of useful data. An analysis of various extended sources of location guided by X-Ray observations reveals no evidence for TeV emission at photon energies above 1 TeV, with resulting 99% upper limits in the ...
A new scheme of two beam accelerator (TBA) driver based on a linear induction accelerator is suggested in this work The electron beam bunching occurs at a rather low initial energy ~1 MeV. The bunched beam is accelerated in the .accompanying enhanced synchronous microwave that provides the steady longitudinal beam bunching along the whole driver. There is no total microwave power extraction any...
Microwave vacuum drying has been investigated as promising potential for high-quality dried fruits. In this study, a batch microwave vacuum dryer was used to understand the effect of levels of microwave power on the drying characteristics and moisture content of grapes. Thompson seedless grapes were treated 1st for 30, 60, and 90 min at fixed levels of 500, 750, 1000, 1250, and 1500 W at a redu...
In common usage, the handset of a wireless telephone is held against the ear. Computational and experimental studies have demonstrated that about 50% of the radiated RF/microwave energy is deposited in tissues on the same side of the head, nearest to the telephone. The deposited energy measured in specific absorption rates (SAR) of RF/microwave energy is nonuniformly distributed inside the head...
Introduction/purpose: Technological progress has led to the actualization of problem construction and use high-energy microwave weapons, especially electromagnetic bombs. However, in recent military-professional literature, this issue is little represented. Methods: The available existing literature on subject was analyzed. Results: It been established that general principles functioning theore...
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