Hypersonic Vehicle Trajectory Optimization and Control

Two classes of neural networks have been developed for the study of hypersonic vehicle trajectory optimization and control. The first one is called an 'adaptive critic'. The uniqueness and main features of this approach are that: (1) they need no external training; (2) they allow variability of initial conditions; and (3) they can serve as feedback control. This is used to solve a 'free final time' two-point boundary value problem that maximizes the mass at the rocket burn-out while satisfying the pre-specified burn-out conditions in velocity, flightpath angle, and altitude. The second neural network is a recurrent network. An interesting feature of this network formulation is that when its inputs are the coefficients of the dynamics and control matrices, the network outputs are the Kalman sequences (with a quadratic cost function); the same network is also used for identifying the coefficients of the dynamics and control matrices. Consequently, we can use it to control a system whose parameters are uncertain. Numerical results are presented which illustrate the potential of these methods

Perfil sensorial de vinhos elaborados com uvas americanas e híbridas.

A avaliação da qualidade de vinhos envolve a utilização de atributos visuais, olfativos e gustativo

A smooth introduction to the wavefront set

The wavefront set provides a precise description of the singularities of a distribution. Because of its ability to control the product of distributions, the wavefront set was a key element of recent progress in renormalized quantum field theory in curved spacetime, quantum gravity, the discussion of time machines or quantum energy inequalitites. However, the wavefront set is a somewhat subtle concept whose standard definition is not easy to grasp. This paper is a step by step introduction to the wavefront set, with examples and motivation. Many different definitions and new interpretations of the wavefront set are presented. Some of them involve a Radon transform.Comment: 29 pages, 7 figure

Avaliação de clones de videira "Bordô" para elaboração de sucos tintos.

O trabalho objetivou avaliar seis clones de videira da cv. Bordô, uma das principais uvas comuns cultivadas para processamento no Rio Grande do Sul, devido à tonalidade violácea intensa, ao paladar apreciado pelo consumidor e pela resistência às principais doenças fúngicas. Clones de "Bordô" foram prospectados pela Embrapa Uva e Vinho com o apoio de empresas vitícolas entre 2012 e 2013, considerando: taxa de abortamento floral, estabilidade de produção, tamanhos de cacho e bagas, nos seguintes municípios: Videira (V), Antônio Prado (AP), Garibaldina (GA), Garibaldi (G), Nova Roma do Sul (NRS) e Farroupilha (F)

Cultivo protegido das uvas de mesa sem sementes "BRS Vitória" e "BRS Isis" na região da Serra Gaúcha.

A fruticultura brasileira é responsável por 16% dos empregos gerados pelo agronegócio nacional, sendo que, em média, são geradas duas novas vagas a cada hectare cultivado com frutas (ANUÁRIO..., 2018). Quando se considera o volume total produzido, independente da finalidade, a uva está incluída entre os seis produtos responsáveis por cerca de 70% do valor bruto da produção brasileira de frutas (ANUÁRIO..., 2018). No Brasil, a viticultura é praticada em uma grande extensão norte-sul, de cerca de 78.000 ha, incluindo regiões de clima temperado, subtropical e tropical. São exploradas cultivares que pertencem à espécie Vitis vinifera, híbridos de V. labrusca, além de híbridos complexos. Metade do volume total de uvas produzido no país é destinada para o consumo in natura, sendo originada principalmente em regiões de clima subtropical e tropical, nos estados de Pernambuco, da Bahia, de São Paulo, Paraná e de Minas Gerais, enquanto o segmento de uvas para processamento está concentrado na região Sul do país (MAIA et al., 2018).bitstream/item/202699/1/Circ-Tec143.pd

BRS Melodia: nova cultivar de uvas sem sementes, com sabor especial de mix de frutas vermelhas, recomendada para cultivo na Serra Gaúcha, em cobertura plástica.

A ‘BRS Melodia’, que agora está sendo disponibilizada para os viticultores gaúchos, vem compor o conjunto de cultivares brasileiras para consumo in natura. A nova cultivar constitui uma alternativa de uva de mesa sem sementes, com sabor especial de mix de frutas vermelhas, para ser produzida na Serra Gaúcha, em sistema de cobertura plástica. Esta cultivar, rosada e sem sementes, atende ainda à demanda dos viticultores da região por uma uva sem sementes semelhante à cultivar importada ‘Crimson Seedless’, que não apresenta boa adaptação para cultivo na região.bitstream/item/203207/1/Circ-Tec144.pd

Measurement of χ c1 and χ c2 production with s√ = 7 TeV pp collisions at ATLAS

The prompt and non-prompt production cross-sections for the χ c1 and χ c2 charmonium states are measured in pp collisions at s√ = 7 TeV with the ATLAS detector at the LHC using 4.5 fb−1 of integrated luminosity. The χ c states are reconstructed through the radiative decay χ c → J/ψγ (with J/ψ → μ + μ −) where photons are reconstructed from γ → e + e − conversions. The production rate of the χ c2 state relative to the χ c1 state is measured for prompt and non-prompt χ c as a function of J/ψ transverse momentum. The prompt χ c cross-sections are combined with existing measurements of prompt J/ψ production to derive the fraction of prompt J/ψ produced in feed-down from χ c decays. The fractions of χ c1 and χ c2 produced in b-hadron decays are also measured

Search for squarks and gluinos in events with isolated leptons, jets and missing transverse momentum at s√=8 TeV with the ATLAS detector

The results of a search for supersymmetry in final states containing at least one isolated lepton (electron or muon), jets and large missing transverse momentum with the ATLAS detector at the Large Hadron Collider are reported. The search is based on proton-proton collision data at a centre-of-mass energy s√=8 TeV collected in 2012, corresponding to an integrated luminosity of 20 fb−1. No significant excess above the Standard Model expectation is observed. Limits are set on supersymmetric particle masses for various supersymmetric models. Depending on the model, the search excludes gluino masses up to 1.32 TeV and squark masses up to 840 GeV. Limits are also set on the parameters of a minimal universal extra dimension model, excluding a compactification radius of 1/R c = 950 GeV for a cut-off scale times radius (ΛR c) of approximately 30

Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at s√=8 TeV with ATLAS

Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of s√=8 TeV. The analysis is performed in the H → γγ decay channel using 20.3 fb−1 of data recorded by the ATLAS experiment at the CERN Large Hadron Collider. The signal is extracted using a fit to the diphoton invariant mass spectrum assuming that the width of the resonance is much smaller than the experimental resolution. The signal yields are corrected for the effects of detector inefficiency and resolution. The pp → H → γγ fiducial cross section is measured to be 43.2 ±9.4(stat.) − 2.9 + 3.2 (syst.) ±1.2(lumi)fb for a Higgs boson of mass 125.4GeV decaying to two isolated photons that have transverse momentum greater than 35% and 25% of the diphoton invariant mass and each with absolute pseudorapidity less than 2.37. Four additional fiducial cross sections and two cross-section limits are presented in phase space regions that test the theoretical modelling of different Higgs boson production mechanisms, or are sensitive to physics beyond the Standard Model. Differential cross sections are also presented, as a function of variables related to the diphoton kinematics and the jet activity produced in the Higgs boson events. The observed spectra are statistically limited but broadly in line with the theoretical expectations