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It is a great challenge to model and mine the e-commercial data, which is made up of multiple types of objects, such as products, users, comments and tags. To model the complicated interactive relationships in the the e-commercial data, we propose to transform the complex e-commercial data into a text-rich heterogeneous e-commercial network. Then three neural network based embedding algorithms named...
Polarimetric synthetic aperture radar (PolSAR) is an advanced imaging radar system, for which the acquired data provide not only the information of each channel but also the correlation between channels. To fully utilize and accurately model the multilook PolSAR data, a novel compound distribution, named the $\mathcal {H}$ distribution, is proposed based on the generalized Fisher distribution (...
estimating the regolith depth from brightness temperature (TB) measured by a multi-channel radiometer at 3GHz, 7.8GHz, 19.35GHz and 37GHz. To establish the accurate microwave radiation or scattering model of lunar surface, firstly we need to determine an accurate model of dielectric constant of lunar regolith. However, until now there is no model of dielectric constant suitable for microwave band...
In this paper, we extend the product model from common texture to the case of multitexture. With the generalized Gamma distribution (GΓD) being the texture distribution, a multitexture model for multilook polarimetric SAR data is proposed and the estimation of parameters is performed based on the method of matrix log-cumulant. As far as the diagonal random texture matrix is concerned, the textures...
Direct reconstruction algorithms for PET are capable of producing lower variance parametric images than those from the traditional frame-based approach. However, if the selected kinetic model is not appropriate for all voxels in the field-of-view, structured residuals from poor model fits can propagate bias into neighboring regions where the model is accurate. We previously proposed a direct reconstruction...
The aim of this research is to extend a direct parametric reconstruction algorithm for dynamic PET to include spillover terms for use in cardiac perfusion imaging. Perfusion imaging with cardiac PET is used clinically to produce images of myocardial blood flow, aiding the diagnosis of coronary artery disease and the monitoring of condition of coronary circulation in response to treatment. PMOLAR-1T,...
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