نتایج جستجو برای: back lobe suppression
تعداد نتایج: 316925 فیلتر نتایج به سال:
This paper introduces the design of a high-gain wideband microstrip patch antenna for sub-6 GHz 5G communication. The proposed integrates novel defected ground structure (DGS) achieving wide bandwidth. plane uses triangular strip inserted into to improve performance antenna. It also reflective plate concentrate side lobes and minimise production back lobe, thereby boosting main lobe radiated si...
The authors critically reviewed experiments in which transcranial magnetic stimulation (TMS) and repetitive TMS (rTMS) of the higher visual pathway were used. Topics include basic mechanisms of neural excitation by TMS and their relevance to the visual pathway (excitatory and inhibitory effects), TMS and rTMS of calcarine cortex (suppression, unmasking, and phosphenes), TMS of V5 (suppression),...
The paper proposes the current performance enhancing method for dual three-phase permanent magnet synchronous motor (DTP-PMSM) with identical back-electromotive force (EMF) two winding sets accounting common-mode (CM) suppression. Considering inevitable asymmetry of parameters in motor, pulse cancellation theory is proposed which releases duty cycle freedom conventional zero CM voltage (ZCMV) w...
abstract the intraparenchymal schwannomas are very rare tumors with only 52 reported cases . we describe a 38 years old man with eight months history of poorly controlled seizures despite of medical therapy. on brain ct scan a 1.5 x 1.5 cm hypodense enhancing lesion was seen in right posterior-inferior frontal lobe. on brain mri the lesion was hypointense in t1 and hyperintense in t2 with homog...
Functional magnetic resonance imaging (fMRI) is now a well-established technique for directly identifying adult brain activity. This study builds on earlier pilot work that showed that fMRI could provide direct evidence of fetal brain cortical activation in response to an auditory stimulus. The new work presented here aims to assess the sensitivity of this technique in a larger sample group. Th...
Brazilian specimens of Branchiosyllis cf. exilis, B. tamandarensis sp. n., Haplosyllis lattigae sp. n., H. loboi, Opisthosyllis brunnea and O. viridis are described and illustrated herein, from recently collected material; also, the distributions of Haplosyllis amphimedonicola and H. rosenalessoae are expanded to other localities in the states of Paraíba and Pernambuco. Branchiosyllis tamandare...
Problems of radiation pattern synthesis, sidelobe suppression, or back suppression appear when using antennas with reflectors ground planes. The use a semitransparent surface allows the required shape to be synthesized efficiently through variation reflection and transmission coefficients. Effective synthesis is possible analytical formulas designed for patterns reflectors. In this article, we ...
In view of the strong self-interference problem when practical phased array system is simultaneously applied for transmission and reception, under constraints including limited quantization number, constant envelope amplitude, scanning mode, wideband signal etc., this work studies it proposes amplitude-phase joint adjustment method phase-only beamforming optimization. Through digital simulation...
We analyse selection rules for the emission of two electrons from the helium atom following the absorption of a few photons in an intense laser field. The rules arise, as generalization of the well-studied one-photon case, due to the symmetries of the accessible final states in the two-electron continuum. We show, in particular, that an increase in the number of absorbed photons leads to altern...
Functional magnetic-resonance imaging was used to identify areas involved in naming objects and to examine which of these areas adapted to either physical or semantics features of objects. We presented successive pairs of objects that were either the same exemplar of an object, different exemplars of that object, or different objects. By controlling for differences in physical features between ...
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