190,281 research outputs found
Antonio Montoro Sanchis, Poética española.
No full textAubrun Charles Vincent. Antonio Montoro Sanchis, Poética española.. In: Bulletin Hispanique, tome 53, n°2, 1951. p. 223
Analytical model for calculating the nonlinear distortion in silicon-based electro-optic Mach-Zehnder modulators
No full textIn this study, an analytical model for calculating the nonlinear harmonic/intermodulation distortion for RF signals in silicon-based electro-optic modulators is investigated by considering the nonlinearity on the effective index change curve with the operation point and the device structure simultaneously. Distortion expressions are obtained and theoretical results are presented showing that optimal modulator parameters can be found to linearize it. Moreover, the harmonic distortion of a 1 mm silicon-based asymmetric MZI is RF characterized and used to corroborate the theoretical results. Based on the present model, the nonlinear distortion in terms of bias voltage or operating wavelength is calculated and validated by comparing with the experimental data, showing a good agreement between measurements and theory. Analog photonic link quality parameter like carrier-to-distortion is one of the parameters that can be found with that model. Finally, the modulation depth is measured to assure that no over-modulation is produced
A photonic microwave filter based on an asymmetric silicon Mach-Zehnder modulator
No full text[EN] A new approach for implementing an integrable photonic microwave filter based on exploiting the asymmetry of a CMOS-compatible silicon Mach-Zehnder modulator is demonstrated. The strong dependence of the modulator response with wavelength is exploited for achieving positive and negative taps and, therefore, a fully reconfigurable filter, without the complexity of previous approaches. Two filter responses with two and three taps are experimentally demonstrated, showing the proof-of-principle for frequencies up to 10 GHz and thus going one step further toward a full integration of the complete filter device in the CMOS-compatible silicon photonics platform. © 2009-2012 IEEE.Manuscript received May 16, 2013; revised June 12, 2013; accepted June 13, 2013. Date of publication June 18, 2013; date of current version June 26, 2013. This work was supported by the European Commission through project HELIOS (Photonics Electronics functional Integration on CMOS) under Grant FP7-224312. The work of P. Sanchis was supported by funding from TEC2012-38540 LEOMIS, TEC2008-06333 SINADEC, and PROMETEO-2010-087. The works of D. J. Thomson, F. Y. Gardes, and G. T. Reed were supported by the UK EPSRC funding body under the grant BUK Silicon Photonics.[Corresponding author: P. Sanchis (e-mail: [email protected]).Gutiérrez Campo, AM.; Sanchis Kilders, P.; Brimont, ACJ.; Thomson, DJ.; Gardes, FY.; Reed, GT.; Fédéli, JM.... (2013). A photonic microwave filter based on an asymmetric silicon Mach-Zehnder modulator. IEEE Photonics Journal. 5(4):5501006-5501006. https://doi.org/10.1109/JPHOT.2013.2269677S550100655010065
Nápoles y Josep Sanchis Sivera: una evocación personal (1902)
No full textDurante la primavera de 1901, el historiador valenciano Josep Sanchis Sivera (1867-1937) realizó una interesantísima tournée que lo llevó a visitar diez ciudades italianas, entre las cuales Nápoles. Un viaje ciertamente emocionante y elocuente que, unos meses después, relató con todo tipo de detalles en el volumen titulado Dos meses en Italia (Impresiones y recuerdos) (1902). Así, en el transcurso de aquella narración, repleta de referencias artísticas e históricas aderezadas con anécdotas, destacan de una manera expresiva los capítulos dedicados a Nápoles, una metrópoli que el autor descubrió y evocó con erudición, emotividad y buen humor, con un evidente magnetismo. De este modo, el trabajo pretende analizar los lugares y las personas que Sanchis Sivera visitó y trató durante su estancia en la Campania
La logística aplicada a la industria textil
No full textSanchis Cubells, P. (2015). La logística aplicada a la industria textil. https://riunet.upv.es/handle/10251/61221.Archivo delegad
A version of Stone-Weierstrass theorem in Fuzzy Analysis
No full text[EN] Let C(K, E1) be the space of continuous functions defined between a compact Hausdorff space K and the space of fuzzy numbers E1 endowed
with the supremum metric. We provide a sufficient set of conditions on a subspace of C(K, E1) in order that it be dense. We also obtain a similar result for interpolating families of C(K, E1).This research is supported by Spanish Government (MTM2016-77143-P), Universitat Jaume I (Projecte P1-1B2014-35) and Generalitat Valenciana (Projecte AICO/2016/030).Font, JJ.; Sanchis, D.; Sanchis, M. (2017). A version of Stone-Weierstrass theorem in Fuzzy Analysis. En Proceedings of the Workshop on Applied Topological Structures. Editorial Universitat Politècnica de València. 41-46. https://riunet.upv.es/handle/10251/128026OCS414
Non-Direct Encoding Method Based on Cellular Automata to Design Neural Network Architectures
No full textArchitecture design is a fundamental step in the successful application of Feed forward Neural Networks. In most cases a large number of neural networks architectures suitable to solve a problem exist and the architecture design is, unfortunately, still a human expert’s job. It depends heavily on the expert and on a tedious trial-and-error process. In the last years, many works have been focused on automatic resolution of the design of neural network architectures. Most of the methods are based on evolutionary computation paradigms. Some of the designed methods are based on direct representations of the parameters of the network. These representations do not allow scalability; thus, for representing large architectures very large structures are required. More interesting alternatives are represented by indirect schemes. They codify a compact representation of the neural network. In this work, an indirect constructive encoding scheme is proposed. This scheme is based on cellular automata representations and is inspired by the idea that only a few seeds for the initial configuration of a cellular automaton can produce a wide variety of feed forward neural networks architectures. The cellular approach is experimentally validated in different domains and compared with a direct codification scheme.Publicad
Physical properties and radius variations in the HAT-P-5 planetary system from simultaneous four-colour photometry
No full textThe radii of giant planets, as measured from transit observations, may vary with wavelength due to Rayleigh scattering or variations in opacity. Such an effect is predicted to be large enough to detect using ground-based observations at multiple wavelengths. We present the defocused photometry of a transit in the HAT-P-5 system, obtained simultaneously through Strömgren u, Gunn g and r, and Johnson I filters. Two more transit events were observed through a Gunn r filter. We detect a substantially larger planetary radius in u, but the effect is greater than predicted using theoretical model atmospheres of gaseous planets. This phenomenon is most likely to be due to systematic errors present in the u-band photometry, stemming from variations in the transparency of Earth’s atmosphere at these short wavelengths. We use our data to calculate an improved orbital ephemeris and to refine the measured physical properties of the system. The planet HAT-P-5 b has a mass of and a radius of (statistical and systematic errors, respectively), making it slightly larger than expected according to standard models of coreless gas-giant planets. Its equilibrium temperature of 1517 ± 29 K is within 60 K of that of the extensively studied planet HD 209458 b
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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