In the era of big data, data intensive applications have posed new challenges to the field of service composition. How to select the optimal composited service from thousands of functionally equivalent services but di...
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In the era of big data, data intensive applications have posed new challenges to the field of service composition. How to select the optimal composited service from thousands of functionally equivalent services but different Quality of Service(Qo S) attributes has become a hot research in service computing. As a consequence,in this paper, we propose a novel algorithm MR-IDPSO(Map Reduce based on Improved Discrete Particle Swarm Optimization), which makes use of the improved discrete Particle Swarm Optimization(PSO) with the Map Reduce to solve large-scale dynamic service composition. Experiments show that our algorithm outperforms the parallel genetic algorithm in terms of solution quality and is efficient for large-scale dynamic service composition. In addition,the experimental results also demonstrate that the performance of MR-IDPSO becomes more better with increasing number of candidate services.
Aiming at the problem that the detection probability of the moving platform using traditional detection method is low and even bad under low SNR condition.A weak target detection method based on spatial power spectrum...
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ISBN:
(纸本)9781509065769;9781509065752
Aiming at the problem that the detection probability of the moving platform using traditional detection method is low and even bad under low SNR condition.A weak target detection method based on spatial power spectrum map(SPS-MAP) is put *** with traditional cross direction finding method,this method omits the step in which the location is determined with the "post processed" SPS peak information and instead maps the SPS curve directly to the search grid to achieve the purpose of location as *** this thesis,the theoretical properties and computational complexity of the method are deduced and *** last,simulation results show that the proposed method can effectively detect targets in low SNR conditions.
Auto-focusing beams can effectively mitigate orbital angular momentum (OAM) crosstalk in atmospheric turbulence. In this paper, we focus on the effect of the chirp factor on the crosstalk mitigation of chirped pe...
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Radio frequency fingerprinting(RFF) is used to uniquely identify individual radios by exploiting the radio frequency characteristics. Often attributing to the phase ambiguity, the features of an emitt
ISBN:
(纸本)9781467389808
Radio frequency fingerprinting(RFF) is used to uniquely identify individual radios by exploiting the radio frequency characteristics. Often attributing to the phase ambiguity, the features of an emitt
It is always a challenging issue for radar systems to estimate the height of a low-angle target in the multipath propagation *** highly deterministic maximum likelihood estimator has a high accuracy,but the errors of ...
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It is always a challenging issue for radar systems to estimate the height of a low-angle target in the multipath propagation *** highly deterministic maximum likelihood estimator has a high accuracy,but the errors of the ground reflection coefficient and the reflecting surface height have serious influence on the *** this paper,a robust es-timation method with less computation burden is proposed based on the compound reflection coefficient multipath model for low-angle *** compound reflection coefficient is es-timated from the received data of the array and then a one-di-mension generalized steering vector is constructed to estimate the target *** algorithm is robust to the reflecting sur-face height error and the ground reflection coefficient ***-nally,the experiment and simulation results demonstrate the validity of the proposed method.
The location of a moving target based on signal fitting and sub-aperture tracking from an airborne multi-channel radar is dealt *** proposed approach is applied in two steps:first,the ambiguous slant-range velocity i...
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The location of a moving target based on signal fitting and sub-aperture tracking from an airborne multi-channel radar is dealt *** proposed approach is applied in two steps:first,the ambiguous slant-range velocity is derived with a modified single-snapshot multiple direction of arrival estimation method,and second,the unambiguous slant-range velocity is found using a track-based *** prominent advantage of the proposed approach is that the unambiguous slant-range velocity can be very ***,the first stage is carried out at the determinate range-Doppler test cell by azimuth searching for fitting best to the moving target signal,therefore,the location performance would not be sacrificed in order to suppress clutter and/or *** effectiveness and efficiency of the proposed method are validated with a set of airborne experimental data.
The fractal dimension of sea clutter is estimated and its multifractal features are analyzed in this paper. A new method based on the difference between multifractal spectra of sea clutter and target plus sea clutter ...
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Stable consumer electronic systems can assist traffic better. Good traffic consumer electronic systems require collaborative work between traffic algorithms and hardware. However, performance of popular traffic algori...
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In this paper, we analyse the issue of SAR image co-registration for wide-swath and high-resolution spaceborne InSAR. A solution to this problem is proposed in which three processing procedures are adopted. First, ima...
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A mutual coupling calibration algorithm for polarization sensitive sensors is proposed in this paper. By introducing into an auxiliary element and using a calibration source with unknown parameters, the mutual couplin...
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