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The array transducer is a key unit to the phased ultrasound imaging systems. While, size error or element failure of elements are often occurred on the array transducer. Those situations could make serious negative effects on the acoustic field distribution of an array and impact on the quality of ultrasound imaging. In this context, we propose a method to revise those effects of the element failure...
Spatial information has been verified to be helpful in hyperspectral image classification. In this paper, a spatial feature extraction method utilizing spatial and orientational auto-correlations of image local gradients is presented for hyperspectral imagery (HSI) classification. The Gradient Local Auto-Correlations (GLAC) method employs second order statistics (i.e., auto-correlations) to capture...
Compressed sensing (CS) techniques can reduce the sampling rates required in synthetic aperture radar (SAR). However, it is difficult to use the restricted isometry property to theoretically analyze the performance. Therefore, in this letter, information theory is applied to set necessary bounds on sampling ratios in CS-based SAR imaging. The system is viewed as a multi-input/multi-output (MIMO) channel,...
Remote sensing land-use scene classification has a wide range of applications including forestry, urban-growth analysis, and weather forecasting. This paper presents an effective image representation method, Gabor-filtering-based completed local binary patterns (GCLBP), for land-use scene classification. It employs the multi-orientation Gabor filters to capture the global texture information from...
A scheme of PA (product accumulate) code employing pulse-position modulation is investigated for space optical communications. Over a Poisson channel, simulation is conducted. Simulation results show that the PA code has excellent BER (bit error rate) and low error floor. In addition, EXIT (extrinsic information transfer) chart is employed to analyze the BER performance and error floor for PA code...
With the rapid growth of web data, people sometime need semantic similar information in order to obtain a clear outline of their interests, so recommendation is needed to provide relevant information to users' queries. In this paper, we propose a method to recommend semantic similar movies and stars to users' queries, styles and stories. The system measures the similarities between movies according...
The experimental research on the plans of solid-filled type and Liquid-filled type mixed medium of a 100 kVA evaporative cooling transformer is done, and test results are compared and analyzed. It is proved that evaporative cooling transformer using mixed medium can not only reduce the cost of transformer, but also improve its economy on the premise of keeping good cooling effect.
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