Search results for "dga"
showing 10 items of 134 documents
Salīdzinošā analīze attēlu aizpildīšanas uzdevumam, izmantojot GAN neironu tīklus
2022
Aizpildīšanas algoritmi tiek izmantoti attēlu apstrādē, lai labotu attēlu bojātās vai trūkstošās krāsojuma daļas. Šajā darbā tika salīdzināti trīs dziļās mašīnmācīšanās modeļi trūkstošo reģionu aizpildīšanai. Tika sniegti kvalitatīvs salīdzinājums, kvantitatīvi rezultāti un lietotāja izpēte DeepFill v2, CoModGAN un LaMa attēlu izpildīšanas algoritmiem. Tiek izmantotas Places2 un CelebA-HQ datu kopas, lai norādītu vairākas problēmas ar kurām sastopas attēlu atjaunošanā.
Simulation of parasitic effects on Silicon Carbide devices for automotive electric traction
2020
Wide Band Gap (WBG) semiconductors are increasingly addressed towards Electric Vehicle (EV) applications, due to their significant advantages in terms of high-voltage and low-losses performances, suitable for high power applications. Nevertheless, the packaging in WBG devices represents a challenge for designers due to the notable impact that inductive and capacitive parasitic components can bring in high switching frequency regime in terms of noise and power losses. In this paper, a comparison between conventional Silicon (Si) and emerging Silicon-Carbide (SiC) power switching devices is presented. The effects of inductive parasitic effects and switching frequency are investigated in simul…
Fully Vacuum-Processed Wide Band Gap Mixed-Halide Perovskite Solar Cells
2017
Methylammonium lead mixed-halide perovskites MAPb(BrxI1–x)3 are promising materials for the preparation of tandem devices. When exposed to light, MAPb(BrxI1–x)3 segregates in iodide- and bromide-rich phases, limiting the achievable photovoltage and hence the attainable device efficiency. To date only solution-processed mixed-halide perovskites have been demonstrated. We present fully vacuum-deposited mixed-halide perovskite thin films with band gap of 1.72 and 1.87 eV, prepared by controlling the deposition rates of the different halide precursors. When used in thin-film devices, these materials lead to power conversion efficiencies of 15.9 and 10.5%, respectively, which are among the highe…
Progress in the Development of CdTe and CdZnTe Semiconductor Radiation Detectors for Astrophysical and Medical Applications
2009
Over the last decade, cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) wide band gap semiconductors have attracted increasing interest as X-ray and gamma ray detectors. Among the traditional high performance spectrometers based on silicon (Si) and germanium (Ge), CdTe and CdZnTe detectors show high detection efficiency and good room temperature performance and are well suited for the development of compact and reliable detection systems. In this paper, we review the current status of research in the development of CdTe and CdZnTe detectors by a comprehensive survey on the material properties, the device characteristics, the different techniques for improving the overall detector…
Técnicas de aprendizaje automático para la detección de dominios maliciosos generados algorítmicamente
2022
Durante los últimos años, el desarrollo de software malicioso (malware) ha pasado de ser un sector donde la principal motivación era el reconocimiento de la comu- nidad a convertirse en un auténtico negocio multimillonario. Entre las diferentes técnicas que los desarrolladores de malware han empleado para dificultar su de- tección, está el uso de algoritmos de generación de dominios (en inglés, Domain Generation Algorithms o DGA). En el trabajo plasmado en esta tesis doctoral se ha analizado la problemática de esta técnica, se han revisado los diferentes tipos de algoritmos que se pueden encontrar y se ha estudiado el estado del arte en la detección de este tipo de algoritmos en cuanto a té…
Flamand et pélicans. Du flamenco puriste à la fusion loubard. Duende y misterio del flamenco (Edgar Neville, 1952) y Dame veneno (Pedro Barbadillo, 2…
2012
Le cinéma musical espagnol a servi à de nombreuses reprises, des éléments caractéristiques de la espagnolade, comme le flamenco. Cependant, très peu de films ont cessé de les analyser en profondeur. Contrairement à cette tendance, «Duende y Misterio del flamenco» (Edgar Neville) et «Dame veneno» (Pedro Barbadillo) sont présentés comme deux raretés capables de réfléchir profondément sur ce genre musical et son évolution depuis les années soixante-dix. Réminiscence de deux moments distincts de la société espagnole, la comparaison entre les deux films montre l'évolution de la pureté du genre à sa fusion avec d'autres styles musicaux, ce qui reflète l'ouverture de passage à la culture internati…
Ments alterades en el segle XIX: Els relats d'Edgar Allan Poe i Guy de Moupassant
2014
En el present article s’aborda la confl uencia entre l’autor nord-america Edgar Allan Poe (1809-1849) i l’autor frances Guy de Maupassant (1850-1893), que, a pesar d’estar adscrits a tendencies literaries divergents (romanticisme enfront de realisme/naturalisme), van compartir interessos tematics i formals inequivocs en l’ambit del relat. Partint de les primerenques infl uencies de la contistica de Poe sobre l’escriptura de Maupassant, aquest treball se centra en una seleccio dels relats de l’autor frances que el vinculen literariament a Poe (tant en el terreny tematic com en el narratologic), relacionats amb la fascinacio d’ambdos autors per estats mentals atipics i narradors alterats o «a…
Single Event Transients and Pulse Quenching Effects in Bandgap Reference Topologies for Space Applications
2016
An architectural performance comparison of bandgap voltage reference variants, designed in a $0.18~\mu \text {m}$ CMOS process, is performed with respect to single event transients. These are commonly induced in microelectronics in the space radiation environment. Heavy ion tests (Silicon, Krypton, Xenon) are used to explore the analog single-event transients and have revealed pulse quenching mechanisms in analogue circuits. The different topologies are compared, in terms of cross-section, pulse duration and pulse amplitude. The measured results, and the explanations behind the findings, reveal important guidelines for designing analog integrated circuits, which are intended for space appli…
Atomic layer deposition of AlN from AlCl3 using NH3 and Ar/NH3 plasma
2018
The atomic layer deposition (ALD) of AlN from AlCl3 was investigated using a thermal process with NH3 and a plasma-enhanced (PE)ALD process with Ar/NH3 plasma. The growth was limited in the thermal process by the low reactivity of NH3, and impractically long pulses were required to reach saturation. Despite the plasma activation, the growth per cycle in the PEALD process was lower than that in the thermal process (0.4A ° vs 0.7A ° ). However, the plasma process resulted in a lower concentration of impurities in the films compared to the thermal process. Both the thermal and plasma processes yielded crystalline films; however, the degree of crystallinity was higher in the plasma process. The…
Strongly Coupled Coherent Phonons in Single-Layer MoS 2
2019
We present a transient absorption setup combining broadband detection over the visible-UV range with high temporal resolution ($\sim$20fs) which is ideally suited to trigger and detect vibrational coherences in different classes of materials. We generate and detect coherent phonons (CPs) in single layer (1L) MoS$_2$, as a representative semiconducting 1L-transition metal dichalcogenide (TMD), where the confined dynamical interaction between excitons and phonons is unexplored. The coherent oscillatory motion of the out-of-plane $A'_{1}$ phonons, triggered by the ultrashort laser pulses, dynamically modulates the excitonic resonances on a timescale of few tens fs. We observe an enhancement by…