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Complex Target (complex + target)

Distribution by Scientific Domains

Engineering	50%

Selected Abstracts

Learning to love the older consumer

JOURNAL OF CONSUMER BEHAVIOUR, Issue 1 2001
Isabelle Szmigin
Abstract This paper examines how and why marketing has largely ignored the older consumer and concentrated on younger targets. It explores some of the myths of the older consumer and through examining recent research in the USA and the UK makes a plea for accepting the older consumer as still very much in the main stream of marketing. It also explores how society constructs age and how older people may wish to see themselves. While age related myopia is unsatisfactory for both consumers and marketing, older consumers may express a wide range of identities, making them a potentially complex target for marketing. The paper suggests that more research is needed to explore the different motives and identities of these important consumers with a view to better meeting their needs in terms of appropriate products, messages and media. Copyright © 2001 Henry Stewart Publications. [source]

Multilevel fast multipole algorithm enhanced by GPU parallel technique for electromagnetic scattering problems

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 3 2010
Kan Xu
Abstract Along with the development of graphics processing Units (GPUS) in floating point operations and programmability, GPU has increasingly become an attractive alternative to the central processing unit (CPU) for some of compute-intensive and parallel tasks. In this article, the multilevel fast multipole algorithm (MLFMA) combined with graphics hardware acceleration technique is applied to analyze electromagnetic scattering from complex target. Although it is possible to perform scattering simulation of electrically large targets on a personal computer (PC) through the MLFMA, a large CPU time is required for the execution of aggregation, translation, and deaggregation operations. Thus GPU computing technique is used for the parallel processing of MLFMA and a significant speedup of matrix vector product (MVP) can be observed. Following the programming model of compute unified device architecture (CUDA), several kernel functions characterized by the single instruction multiple data (SIMD) mode are abstracted from components of the MLFMA and executed by multiple processors of the GPU. Numerical results demonstrate the efficiency of GPU accelerating technique for the MLFMA. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 502,507, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24963 [source]

Application of rational function approximation technique to hybrid FE/BI/MLFMA for 3D scattering

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 6 2007
Zhen Peng
Abstract In this article, the rational function approximation technique (RFAT) is applied to the hybrid finite-element/boundary-integral/multilevel fast multipole algorithm (FE/BI/MLFMA) to acquire wide-band and wide-angle backscatter radar-cross-section (RCS) by complex targets. The two approaches of using the rational function approximation technique, asymptotic waveform evaluation (AWE) and model-based parameter estimation (MBPE), both have been investigated and compared by theoretical analysis and numerical experiments. The numerical results acquired by the developed computing algorithm of integrating the hybrid FE/BI/MLFMA with the RFAT are presented in the article, demonstrating that the rational function approximation technique can greatly speed up the hybrid FE/BI/MLFMA to acquire wide-band and wide-angle backscatter RCS by complex targets. © 2007 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2007. [source]

Three-dimensional, multi-offset ground-penetrating radar imaging of archaeological targets

ARCHAEOLOGICAL PROSPECTION, Issue 2 2008
Adam D. Booth
Abstract The efficacy of ground penetrating radar (GPR) methods is inhibited when surveying over a target that is structurally complex and/or hosted within attenuative media. Recent research has documented the ability of certain seismic methods to improve imaging using GPR. For imaging complex targets, three-dimensional acquisition and migration methods are applied. For attenuative sites, signal-to- noise ratio (SNR) may be boosted on acquisition of multi-offset data. We present results from an integrated three-dimensional multi-offset survey over a Romano-British villa at Groundwell Ridge, near Swindon, UK. Data were acquired within a grid of dimension 21,m,×,14,m, using a single-channel PulseEKKO GPR system equipped with common-offset (CO) 450,MHz antennas. To satisfy criteria for three-dimensional migration, the sample density over the grid was 0.05,×,0.05,m2. A smaller grid of three-dimensional multi-offset data was acquired, with fold-of-cover 2200%, targeting a low SNR section of data. The spatial resolution and SNR in the resulting images of the target are greatly improved compared with data acquired using a more conventional survey method. However, this improvement may not be justified by the greatly increased (some 10 times) fieldwork effort required to obtain three-dimensional multi-offset data. We therefore investigate a means of improving the efficiency of three-dimensional GPR surveying by applying a simple trace interpolation method to recover three-dimensional acquisition criteria. This trial suggests that, at this site, three-dimensional data can be simulated from a grid of pseudo-three-dimensional data, sampled at 0.05,×,0.25,m2. In this way, high quality images of an archaeological target can be obtained with minimal increase to survey effort. We hope that, on the basis of this work, three-dimensional and multi-offset acquisitions will be more readily considered for archaeological GPR investigations. Copyright © 2008 John Wiley & Sons, Ltd. [source]