Results 91 to 100 of about 51,308 (258)

Equação do calor e séries de Fourier [PDF]

open access: yes, 2020
Orientador: Prof. Dr. Jurandir CecconTrabalho de Conclusão de Curso (graduação) - Universidade Federal do Paraná, Setor de Ciências Exatas, Curso de Graduação em MatemáticaInclui referênciasResumo : Esse trabalho tem como objetivo apresentar uma solução ...
Prantl, V. M. S.
core  

Extraordinary n‐type Tellurium‐Free Thermoelectric Performance of Y‐Doped BiSe via Synergistic Effect of Vacancies and Band Engineering

open access: yesAdvanced Functional Materials, EarlyView.
Yttrium doping in Sb‐alloyed BiSe synergistically induces Bi vacancies and flattens conduction bands, simultaneously slashing lattice thermal conductivity by 50% and boosting the power factor. The optimized n‐type Bi0.64Sb0.3Y0.06Se delivers a peak zT of 0.91 at 393 K (average zT 0.76, 300–523 K) and an 8‐pair module with 4.6% conversion efficiency ...
Wenhao Xie   +16 more
wiley   +1 more source

Sistema de inspeção visual de placas de circuito impresso para linhas de produção em pequenas séries em um contexto multiagentes [PDF]

open access: yes, 2015
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia de Automação e Sistemas, Florianópolis, 2015.A produção em pequenas séries (PPS) vem se destacando e aumentando sua ...
Mello, Alexandre Reeberg de
core  

DFCNformer: A Transformer Framework for Non-Stationary Time-Series Forecasting Based on De-Stationary Fourier and Coefficient Network

open access: yesInformation
Time-series data are widely applied in real-world scenarios, but the non-stationary nature of their statistical properties and joint distributions over time poses challenges for existing forecasting models. To tackle this challenge, this paper introduces
Yuxin Jin, Yuhan Mao, Genlang Chen
doaj   +1 more source

Three-dimensional Korteweg-de Vries equation and traveling wave solutions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2000
The three-dimensional power Korteweg-de Vries equation [ut+unux+uxxx]x+uyy+uzz=0, is considered. Solitary wave solutions for any positive integer n and cnoidal wave solutions for n=1 and n=2 are obtained.
Kenneth L. Jones
doaj   +1 more source

Semiconducting Polymers Post‐Functionalized With Ureido‐Pyrimidinone for Robust Stretchable Transistors

open access: yesAdvanced Functional Materials, EarlyView.
The design of intrinsically robust stretchable semiconducting polymers was achieved through OTBS‐mediated post‐functionalization of PDPP2T side chains with UPy units, generating dual hydrogen‐bonding motifs comprising weaker urethane linkages and strong quadruple UPy interactions along the long alkyl side chain, which is crucial for achieving desirable
Dinda Bazliah   +7 more
wiley   +1 more source

Tratamento e caracterização de sinais de vazamento de líquidos e gases por meio de análise espectral [PDF]

open access: yes, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Química, Florianópolis, 2013.Este trabalho descreve a caracterização, baseada no método acústico, de sinais gerados por ...
Morais, Polliana Corrêa
core  

Halide Perovskite Integrated Photovoltaic Cathodes Incorporating Pt on ZIF‐8‐Derived Carbon for Solar Hydrogen Production

open access: yesAdvanced Functional Materials, EarlyView.
A low‐Pt catalyst supported on zeolitic imidazolate framework (ZIF‐8)‐derived porous carbon and graphite is integrated with a halide perovskite photovoltaic, yielding cathodes that achieve a high photocurrent density (∼20 mA cm−2) under simulated sunlight and exhibit remarkable stability in acidic media over several days, thereby demonstrating a ...
Na Yeong Oh   +12 more
wiley   +1 more source

The engineering as scenario and the mathematical models as actors

open access: yesModelling in Science Education and Learning, 2008
En este artículo se presenta una experiencia de innovación educativa en el ámbito del currículum de las ingenierías. Incluye el trabajo en proyectos como una componente del proceso de enseñanza-aprendizaje, analizándose la validez y la viabilidad de la ...
Joan Gómez Urgellés
doaj   +1 more source

Thermally Robust Spin–Orbit Torque Switching in Low‐Resistivity Mo‐Alloyed β‐W Heterostructures

open access: yesAdvanced Functional Materials, EarlyView.
Mo‐alloyed β‐W heterostructures exhibit enhanced spin‐orbit torque efficiency, reduced resistivity and switching current density, and reliable operation from −50 to +150°C. The optimized W87.3Mo12.7 device achieves high spin Hall conductivity with thermal robustness, highlighting its potential for energy‐efficient magnetic memory and automotive ...
Han Seok Ko   +7 more
wiley   +1 more source

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