نتایج جستجو برای: rtm
تعداد نتایج: 728 فیلتر نتایج به سال:
Resin transfer moulding (RTM) is commonly used for the production of high-performance fibre-reinforced polymer composites. In numerous application areas, the addition of fillers is necessary to enhance some properties of the polymer matrix or provide it with additional properties, such as flame retardancy. As many of the applied additives are solid phase, the reinforcement layers may filter the...
This work was motivated by the availability of a new ground truthed hyperspectral data set, freely accessible to the scientific community for target detection algorithm testing. In our research, we are interested in physics-based approaches to target detection, i.e. those techniques aimed at modeling the radiation transfer within the atmosphere in order to account for atmospheric/viewing/illumi...
Low emittance sub-picosecond electron pulses are expected to be used in a wide field, such as free electron laser, laser acceleration, femtosecond X-ray generation by inverse Compton scattering, and pulse radiolysis, etc. In order to produce the low emittance sub-picosecond electron pulses, we are developing a compact racetrack microtron (RTM) with a new 5 MeV injection system adopting an laser...
The goal of this study is to develop a method to quantify SCIAMACHY degradation and calibration in the UV, where the focus is on the O3 profile wavelength range 270-330 nm. Awaiting SCIAMACHY data reprocessing, the method has been performed on GOME observations, SCIAMACHY predecessor. The approach followed is to compare GOME reflectivity spectra with simulated spectra using collocated independe...
Referential translation machine (RTM) is a prediction engine used for predicting the performance of natural language processing tasks including parsing, machine translation, and semantic similarity pioneering language, task, and domain independence. RTM results for predicting the performance of parsing (PPP) in out-of-domain or in-domain settings with different training sets and types of featur...
Polarity changes in converted-wave images constructed by elastic reverse-time migration causes destructive interference after stacking over the experiments of a seismic survey. The polarity reversal is due to the fact that S-mode polarization changes as a function of direction, and therefore the imaged reflectivity reverses sign at normal incidence. We derive a simple imaging condition for conv...
RTM technology is an attractive alternative for high strength steels by composites with a high fibre volume content. The main advantage is a reduction of the assembly costs, since components can be made in one piece rather than out of a compilation of components. Above that the lower specific weight of a composite product results in a weight reduction. In order to obtain more fundamental knowle...
Stability-indicative determination of ertapenem (E(RTM)) and imipenem (I(MPM)) in the presence of their corresponding open-ring degradation products, the metabolites, is investigated. The degradation products have been isolated via acid-degradation, characterized, and confirmed. Selective quantification of E(RTM) or I(MPM) singly in bulk form, pharmaceutical formulations, and/or in the presence...
We report on the current status of the technical design and results of tests of some components of a compact racetrack microtron (RTM) which is under construction at the Universitat Politècnica de Catalunya (UPC). The RTM end magnets are four-pole systems with the magnetic field created by a rare-earth permanent magnet material. As a source of electrons a 3D off-axis electron gun is used. These...
We develop a representation of reverse-time migration (RTM) in terms of Fourier integral operators, the canonical relations of which are graphs. Through the dyadic parabolic decomposition of phase space, we obtain the solution of the wave equation with a boundary source and homogeneous initial conditions using wave packets. On this basis, we develop a numerical procedure for the reverse-time co...
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