In this letter we report the first experimental observation of temporal delay control of large-spectral-bandwidth multimode laser pulses by means of electromagnetically induced transparency (EIT). We ...achieved controllable retardation with limited temporal distortion of optical pulses with an input spectral bandwidth of 3.3 GHz. The experimental results compare favorably with theoretical predictions.
The solution of constrained satisfaction and constrained optimization problems using a Hopfield model requires determination of the values of a certain number of coefficients linked to the ...surrounding conditions of the problem. It is quite difficult to determine these values, mainly because a heuristic search is necessary. This is not only time-consuming but may lead to solutions that are far from optimal, or even nonvalid ones. So far, there have been no works in literature offering a general method for the search for coefficents with will guarantee optimal or close to optimal solutions. This paper proposes a fuzzy approach which allows automatic determination of Hopfield coefficients.
Left main intervention in myocardial infarction Castagna, Marco T.; Machado, Mauricio Cavalieri; de Oliveira, Jordan Vieira
Catheterization and Cardiovascular Interventions,
02/2010, Letnik:
75, Številka:
2
Report
A new structure is proposed for the reahtion of integrated inductors of relatively high inductance, capable of significantly increasing the self-resonance frequency in comparison with standard ...structures. The extension of the operational bandwidth is achieved by serially connecting four inductors, each one spanning one fourth of the area of a conventional inductor. The resulting cloverleaf-like geometry is characterized by a much higher self-resonance frequency, almost doubled in some cases, at the price of a reduced quality factor with respect to an equal area inductor of comparable inductance. The proposed stucture is quite general and can he applied to both single- and multi-layer inductors.
The performance of multi-layer differential inductors is compared with that achievable by single-layer ones, referring in particular to silicon technology. It is demonstrated that through a proper ...sequence of strips on metal layers, a saving of chip area and a notable increase in self-resonance frequency can be obtained, with only a limited reduction of the quality factor in comparison with a single layer structure of equal inductance. The solution is mainly interesting for applications like choke inductors in VCO's, which require compact inductors of high values of inductance and tolerate moderate quality factors.
The performance of multi-layer differential inductors is compared with that achievable by single-layer ones, referring in particular to silicon technology. It is demonstrated that through a proper ...sequence of strips on metal layers, a saving of chip area and a notable increase in self-resonance frequency can be obtained, with only a limited reduction of the quality factor in comparison with a single layer structure of equal inductance. The solution is mainly interesting for applications like choke inductors in VCOs, which require compact inductors of high values of inductance and tolerate moderate quality factors.
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