The performance of a coaxial mixer equipped with an anchor combined to either radial or axial impeller was investigated. system operated in both counter- and corotating modes the laminar transition flow regimes. Experimental numerical data regarding power consumption, mixing time, tracer evolution, characterization were collected compared. On basis these efficiency criteria, mode found be better choice for mixers investigated impeller−anchor also more efficient terms energy consumption...

The rotating electrical machine industry is known for the optimal development of solutions through experience manufacturers, and its competitiveness based on serial production that amortizes initial design efforts. new concept 4.0 a great opportunity to improve in global market small-medium size electric machinery companies. Therefore, it mandatory these companies adopt technologies offering customized products fulfilling customers' requirements according their investment capacity. To...

SUMMARY A parallel sliding mesh algorithm for the finite element simulation of viscous fluid flows in agitated tanks is presented. Lagrange multipliers are used at interfaces to enforce continuity between fixed and moving subdomains. The novelty method consists coupled solution resulting velocity–pressure‐Lagrange system equations by an ILU(0)‐QMR solver. penalty parameter introduced both interface incompressibility constraints avoid pivoting problems ILU(0) algorithm. To handle convective...

Summary One of the main limitations full waveform inversion (FWI) is need for a good starting model in order to avoid cycle-skipping and convergence local minimum cost function. Image-based methods such as tomography are therefore used typical industrial workflows create initial FWI. In this work we propose an alternative building workflow based on Laplace-Fourier This technique widens frequency bandwidth seismic data by localizing events time. To assess its applicability real depth imaging...

SUMMARY Full-waveform inversion (FWI) relies on low-frequency data to succeed if a good initial model is unavailable. However, field seismic excited by active sources are typically band-limited above 3 Hz. By extrapolated FWI, we can start from computational low frequencies data. extrapolation with deep learning challenging for since neural network trained synthetic usually generalizes poorly real Here use semi-supervised method extrapolate training without labels. Specifically, CycleGAN...

Acoustic full waveform inversion (FWI) has been widely used in marine environment to produce high resolution P wave velocity model. In complex geological contexts with sharp contrast interfaces, acoustic approximation difficulty build geologically plausible models. By honoring both the phase and waveform, elastic FWI can a better depth image. An efficient numerical scheme smart parameterization have implemented make satisfactory compromise between accuracy computational efficiency. We...

The demand for electric machines has increased in the last decade, mainly due to applications that try make a full transition from fuel electricity. These encounter need tailor-made must meet demanding requirements. Therefore, it is necessary small-medium companies adopt new technologies offering customized products fulfilling customers’ requirements according their investment capacity, simplify development process, and reduce computational time achieve feasible design shorter periods....

The applications using electric motors have increased in the last decade. Some of these encounter need for tailor-made that must meet demanding requirements. Therefore, specification stage an motor is a critical part its development. If this properly addressed, then future failures development process can be avoided. This paper presents requirement engineering framework to support small-medium designers/manufacturers with their product. identifies stakeholders and tasks they should undertake...

The success of depth imaging projects ultimately depends on the quality velocity model, which salt geometry is generally thought to be key component in subsalt studies. Standard workflows have therefore been built define this geometry, are implicitly based around simplifying, but apparently widely pertinent assumption that a known constant. Full Waveform Inversion has proved powerful recent addition seismic model-building technology. However, its use tectonic contexts limited. In paper we...

The key for a high quality seismic depth imaging is the velocity model used in migration. Nonetheless constructing such models still very challenging. Seismic analysis tools have limitations when dealing with complex earth structures. Recent progress performance computing allows using Full Waveform Inversion (FWI) formulation to build models. This technology highly challenging due non‐linearity and non‐uniqueness of solution. It based on minimization an objective function measuring misfit...

Ghosts distort the data spectrum and affect results of many seismic processing algorithms (e.g., multiple elimination, imaging, inversion). Green's theorem derived deghosting is a wave theoretic method defined in frequency-space domain with demonstrated capability, accuracy flexibility. In this abstract, we present an analytic example numerical test receiver source side deghosting, its impact on inverse scattering series (ISS) free-surface elimination.

We describe an efficient procedure to calculate the probability of error P/sub e/ for a quadrature amplitude modulation (QAM) communications system operating over channel that introduces distortion, interference, and noise. The method is extension saddlepoint integration technique introduced by Helstrom (1986) efficiently evaluate one-dimensional pulse-amplitude (PAM) systems with intersymbol interference (ISI) crosstalk. consider effects noise, random carrier phase offset, ISI, crosstalk...

Finite Element Method (FEM) analysis tools are the most adopted in design of brushless alternating current motors due to advantage considering multi-physics effects with dependencies variables such as cross-coupling, saturation and others that not possible be modeled analytically high precision. During process designers compute operation points maximum torque per ampere or flux weakening characteristics cannot targeted directly on FEM tool. Therefore, make a sweep simulations post-processed...

Building accurate depth migrated seismic images in on-shore environments is very challenging, especially for data acquired areas of strong topography changes and complex shallow velocities variations like foothills context. The examples presented this abstract show how incorporating first break picks information during the full waveform inversion (FWI) process, facilitated convergence iterative process to produce an improved near surface velocity model. Three different real case applications...

In this paper, we report on the successful application of multi-parameter Full Waveform Inversion (FWI) to marine carbonates field. The uplift from inverting both velocity and anisotropy is highlighted. addition, it noted that accounting for variable density frees inversion explaining contrast at water bottom as a pure contrast. This in turn yields simpler shallow model improves flatness gathers. Presentation Date: Wednesday, October 19, 2016 Start Time: 8:00:00 AM Location: 162/164 Type: ORAL

This paper presents an electromagnetic design alternative using the so-called banana-shaped magnets, achieving magnet weight reduction of 21.82% for same performance as baseline motor in case study. Typically, parallel magnetization is used this topology because it provides manufacturing advantage not building a specific magnetizing device required to achieve radial magnetization. Therefore, its main contribution, proposes tilted magnetization, demonstrating that better than conventional way...

This study aims to relate the impact of scientific productivity through research and development different geographic areas considering relation variables per capita income, education, consumption, trade between countries, belonging Organization for Economic Cooperation Development. The relates policies that countries invest in their universities. Therefore, it has focused on allocating resources delivered development. showed classification by geographical area, showing relevance location a...

Abstract Permanent magnet price volatility is an ongoing issue that affects many industrial sectors worldwide, dictating the costs of final product by a substantial degree. This fluctuation can be attributed to large concentration NdFeB production and material sourcing occurring in concentrated geopolitical areas, thus motivating institutions governments look elsewhere for various applications. The work presented this paper aims determine viability recycled permanent magnets electric...

A sensorless online temperature estimator is presented in this paper, which estimates the using a novel signal injection strategy. This allows to eliminate sensors machine, as well their faults, increasing system reliability. double dead-time DC injected adding controlled offset control drive through inverter. The proposed strategy eliminates effect of signal, an important drawback strategies for resistance estimation. Furthermore, additional hardware not needed. has been implemented...