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The Cauchy Problem for Coupled Nonlinear Schrdinger Equations with Linear Damping： Local and Global Existence and Blowup of Solutions

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Chinese Annals of Mathematics,Series B 2016年第5期37卷 665-682页

作者： Joao-Paulo dias Mario FIGUEIRA vladimir v. KONOTOP LCMAF-CIO Faculdade de Ciencias Universidade de Lisboa Av. Prof. Gama Pinto 2 1649-003 Lisboa Portugal. Centro de Fisica Teorica e Computacional and Departamento de Fisica Faculdade de Ciencias Universidade de Lisboa Campo Grande Ed.C8 1749-016 Lisboa Portugal.

The authors study, by applying and extending the methods developed by Cazenave(2003), dias and Figueira(2014), dias et al.(2014), Glassey(1994–1997), Kato(1987), Ohta and Todorova(2009) and Tsutsumi(1984), the Cauchy problem for a damped coupled system of nonlinear Schrdinger equations and they obtain new results on the local and global existence of H^1-strong solutions and on their possible blowup in the supercritical case and in a special situation, in the critical or supercritical cases.

关键词： supercritical Cauchy applying estimates proof admissible constants uniqueness nonlinearity inequality

The radiative decay D^(0)→ K^(*0)γ with vector meson dominance

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Chinese Physics C 2018年第4期42卷 135-141页

作者： J. M. dias v. R. Debastiani Ju-Jun Xie E. Oset Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China Departamento de Física Teórica and IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo. 22085 46071 Valencia Spain Instituto de Física Universidade de S？o Paulo C. P. 66318 05389-970 S？o Paulo SP Brazil

Motivated by the experimental measurements of D0 radiative decay modes, we have proposed a model to study the D0→ K＊0γ decay, by establishing a link with D0→ K＊0v （v=ρ0, ω） decays through the vector meson dominance hypothesis. In order to do this properly, we have used the Lagrangians from the local hidden gauge symmetry approach to account for vγ conversion. As a result, we have found the branching ratio B[D0→ K＊0γ]=（1.55-3.44）×10-4, which is in fair agreement with the experimental values reported by the Belle and BaBar collaborations.

关键词： radiative decay vector meson dominance local hidden gauge symmetry

Probabilistic analysis of ultimate seismic bearing capacity of strip foundations

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第4期10卷 717-724页

作者： Adam Hamrouni Badreddine Sbartai Daniel dias Laboratory InfraRes Mohammed Cherif Messaadia UniversitySouk-AhrasAlgeria Department of Civil Engineering Badji Mokhtar-Annaba UniversityAnnabaAlgeria Laboratory LMGHU Skikda UniversitySkikdaAlgeria School of Automotive and Transportation Engineering Hefei University of TechnologyHefei230009China Grenoble Alpes University Laboratory 3SRGrenobleFrance

This paper presents a reliability analysis of the pseudo-static seismic bearing capacity of a strip foundation using the limit equilibrium theory. The first-order reliability method(FORM) is employed to calculate the reliability index. The response surface methodology(RSM) is used to assess the Hasofer e Lind reliability index and then it is optimized using a genetic algorithm(GA). The random variables used are the soil shear strength parameters and the seismic coefficients(khand kv). Two assumptions(normal and non-normal distribution) are used for the random variables. The assumption of uncorrelated variables was found to be conservative in comparison to that of negatively correlated soil shear strength parameters. The assumption of non-normal distribution for the random variables can induce a negative effect on the reliability index of the practical range of the seismic bearing capacity.

关键词： Strip foundations Seismic bearing capacity First-order reliability method (FORM) Response surface methodology (RSM) Reliability Genetic algorithm (GA)

Ultrashort pulse capability at the L2I high intensity laser facility

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High Power Laser Science and Engineering 2017年第1期5卷 7-11页

作者： Gonqalo Figueira Joana Alves Joao M.dias Marta Fajardo nuno Gomes victor Hariton Tayyab Imran Celso P.Joao Jayanath Koliyadu Swen Kunzel Nelson C.Lopes Hugo Pires Filipe Ruao Gareth Williams GoLP/Instituto de Plasmas e Fusao Nuclear lnstituto Superior TecnieoUniversidade de LisboaLisbonPortugal Faculdade de Ciências e Tecnologia Universidade Nova de LisboaCaparicaPortugal Department of Physics&Astronomy College of ScienceKing Saud UniversityRiyadhSaudi Arabia

The Laboratory for Intense Lasers(L2I) is a research centre in optics and lasers dedicated to experimental research in high intensity laser science and technology and laser plasma interaction. Currently the laboratory is undergoing an upgrade with the goal of increasing the versatility of the laser systems available to the users, as well as increasing the pulse repetition rate. In this paper we review the current status of the laser research and development programme of this facility, namely the upgraded capability and the recent progress towards the installation of an ultrashort, diode-pumped OPCPA laser system.

关键词： diode-pumped solid-state laser and applications femtosecond laser and applications frequency conversion laser amplifiers nonlinear optics

The effects of low-volume combined training on health-related physical fitness outcomes in active young adults: A controlled clinical trial

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Sports Medicine and Health Science 2023年第1期5卷 74-80页

作者： Ricardo Martins nuno Loureiro Department of Arts Humanities and SportsSchool of EducationPolytechnic Institute of BejaLaboratory of Physical Activity and HealthBejaPortugal

The effects of combined training(CT)on improving general health are well known,however,few studies have investigated the effects of low-volume ***,the aim of this study is to investigate the effects of 6 weeks of lowvolume CT on body composition,handgrip strength(HGS),cardiorespiratory fitness(CRF)and affective response(AR)to *** healthy,active young adult man(meanSD,[20.061.66]years;[22.232.76]kg/m2)performed either a low-volume CT(EG,n?9),or maintained a normal life(CG,n?9).The CT was composed of three resistance exercises followed by a high intensity-interval training(HIIT)on cycle ergometer performed twice a *** measures of the body composition,HGS,maximal oxygen consumption(v_O2max)and AR to exercise were taken at baseline and after training for ***,an ANOvA test of repeated measures and t-test paired samples were used with a p*** results showed that EG improved HGS(pre:[45.6711.84]kg ***:[52.4411.90]kg,pv_O2max(pre:[41.365.16]ml⋅kg-1⋅min-1 ***:[44.075.98]ml⋅kg-1⋅min-1,p0.05),nevertheless the feeling scale was positive in all weeks and without significant differences between them(p>0.05).Lastly,for active young adults,the low-volume CT improved HGS,CRF and had a positive outcome in AR,with less volume and time spent than traditional exercise recommendations.

关键词： Exercise Concurrent training Handgrip strength Cardiorespiratory fitness Affective response Untrained

Tracheobronchial Polyflex stents for the management of benign refractory hypopharyngeal strictures

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World Journal of Gastroenterology 2012年第6期18卷 551-556页

作者： Rui Almeida Silva nuno Mesquita Pedro Pimentel Nunes Elisabete Cardoso Ricardo Marcos Pinto Luís Moreira dias Department of Gastroenterology Instituto Português de Oncologia do Porto Francisco GentilR.Doutor António Bernardino de Almeida 4200-072PortoPortugal Department of Gastroenterology Centro Hospitalar do PortoLargo Prof.Abel Salazar 4099-001PortoPortugal

AIM:To describe a modified technique for placement of a tracheobronchial self-expanding plastic stent(SEPS) in patients with benign refractory hypopharyngeal strictures in order to improve dysphagia and allow stricture ***:A case series of four consecutive patients with complex hypopharyngeal strictures after combinedtherapy for laryngeal cancer,previously submitted to multiple sessions of dilation without lasting improvement,is *** patients underwent placement of a small diameter and unflared tracheobronchial *** outcome measurements were improvement of dysphagia and avoiding of repeated ***:The modified introducer system allowed an easy and technically successful deployment of the tracheobronchial Polyflex stent through the *** four patients developed complications related to stent *** patients had stent migration(one proximal and one distal),two patients developed phanryngocutaneous fistulas and all patients with stents in situ for more than 8 wk had hyperplastic tissue growth at the upper end of the *** recurrence was observed at 4 wk follow-up after stent removal in all patients CONCLUSION:Although technically feasible,placement of a tracheobronchial SEPS is associated with a high risk of *** diameter stents must be kept in place for longer than 3 mo to allow adequate time for stricture remodeling.

关键词： Larynx neoplasms Hypopharynx Strictures Dilation Stents

Industry return lead‑lag relationships between the US and other major countries

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Financial Innovation 2023年第1期9卷 1055-1102页

作者： Ana Monteiro nuno Silva Helder Sebastiao CeBER Faculty of EconomicsUniv CoimbraAv Dias da Silva 1653004‑512 CoimbraPortugal

In this study,we analyze the lead-lag relationships between the US industry index and those of six other major countries from January 1973 to May *** identify the leading role played by the US internationally by showing that the weekly returns of US industries,especially the US basic materials and energy industries,significantly Granger cause the returns of most other countries’industries,suggesting that non-US industries react with some delay to new *** delayed reaction is even more notice-able during periods of recession in the US when cross-country correlations are *** implies that the ability of the lagged returns of US industries to predict industries’returns from other countries is even more pronounced when the US experienced an economic recession.A similar asymmetric relationship is found between the volatil-ity of US industries and that of industries in other *** analysis of causality in the distribution of returns and volatility shows that causality runs mainly from the US to other countries,particularly in the presence of extreme negative ***,we demonstrate that our predictions are valuable to real-world ***-short strategies generate sizable and statistically significant alphas,and a constant relative risk-averse investor obtains certainty equivalent returns well above the risk-free rate.

关键词： International diversification Industry equity indexes Granger causality Causality in distribution

Ballistic response of armour plates using Generative Adversarial Networks

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Defence Technology（防务技术） 2022年第9期18卷 1513-1522页

作者： S.Thompson F.Teixeira-dias M.Paulino A.Hamilton Institute for Infrastructure and Environment(IIE) School of EngineeringThe University of Edinburgh Alexander Graham Bell BuildingThe King's BuildingsEdinburghEH93FGUnited Kingdom School of Engineering Faculty of ScienceEngineering and Built EnvironmentDeakin University Waurn PondsVictoria3220Australia Data Science and AI EngineeringGroup Chief Information O CeLloyds Banking Group69 Morrison StEdinburghEH38BWUnited Kingdom

It is important to understand how ballistic materials respond to impact from projectiles such that informed decisions can be made in the design process of protective armour systems. Ballistic testing is a standards-based process where materials are tested to determine whether they meet protection, safety and performance criteria. For the v50ballistic test, projectiles are fired at different velocities to determine a key design parameter known as the ballistic limit velocity(BLv), the velocity above which projectiles perforate the target. These tests, however, are destructive by nature and as such there can be considerable associated costs, especially when studying complex armour materials and systems. This study proposes a unique solution to the problem using a recent class of machine learning system known as the Generative Adversarial Network(GAN). The GAN can be used to generate new ballistic samples as opposed to performing additional destructive experiments. A GAN network architecture is tested and trained on three different ballistic data sets, and their performance is compared. The trained networks were able to successfully produce ballistic curves with an overall RMSE of between 10 and 20 % and predicted the v50BLv in each case with an error of less than 5 %. The results demonstrate that it is possible to train generative networks on a limited number of ballistic samples and use the trained network to generate many new samples representative of the data that it was trained on. The paper spotlights the benefits that generative networks can bring to ballistic applications and provides an alternative to expensive testing during the early stages of the design process.

关键词： Machine learning Generative Adversarial Networks GAN Terminal ballistics Armour systems

Dynamical Demixing of a Binary Mixture Under Sedimentation

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Communications in Computational Physics 2023年第1期33卷 1-21页

作者： Andre S.Nunes Rodrigo C.v.Coelho vasco C.Braz Margarida M.Telo da Gama nuno A.M.Araujo Centro de F´ısica Te´orica e Computacional Faculdade de CiˆenciasUniversidade de LisboaP-1749-016 LisboaPortugal Departamento de F´ısica Faculdade de CienciasUniversidade de LisboaP-1749-016 LisboaPortugal Electric Ant Lab Science Park 1061098 XGAmsterdamThe Netherlands

We investigate the sedimentation dynamics of a binary mixture,the species of which differ by their Stokes coefficients but are identical *** analyze the sedimentation dynamics and the morphology of the final deposits using Brownian dynamics simulations for mixtures with a range of sedimentation velocities of both *** addition,we use the lattice Boltzmann method to study hydrodynamic *** found a threshold in the difference of the sedimentation velocities above which the species in the final deposit are *** degree of segregation increases with the difference in the Stokes coefficients or the sedimentation velocities above the *** propose a simple analytical model that captures the main features of the simulated deposits.

关键词： Sedimentation Brownian dynamics lattice Boltzmann method