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How to make dynamic recommendations under volatile user interest drifts has been a problem of great interest in modern recommender systems, where challenges lie in accurate and efficient measurement, modeling, and prediction of the user interest drifts. This paper studies a category-based approach to the problem with the key idea that items are aggregated into categories and recommendations are made...
Automatic annotation of images is of crucial importance in image retrieval and management systems. Most of the existing annotation methods rely on content-based approach to annotation, whose effectiveness is restricted due to the semantic gap between low-level features and semantic annotations, as well as the irrelevance between annotations and image content. Recently, social media analysis has been...
Matrix multiplication is used in a variety of applications. It requires a lot of computation time especially for large-scale matrices. Parallel processing is a good choice for matrix multiplication operation. To overcome the efficiencies of existing algorithms for parallel matrix multiplication, a matrix multiplication processing scheme based on vector linear combination (VLC) was presented. The VLC...
The successful accomplishment of the Moon exploration project will not be achieved without the support of the lunar orbit relay satellite, and while the law of the lunar orbit relay satellite tracking the user satellite is an important researching aspect. in this paper, a mathematical model based on law of the lunar orbit relay satellite tracking the user satellite is established firstly, and then...
In this paper, we propose a rank minimization method to fuse the predicted confidence scores of multiple models, each of which is obtained based on a certain kind of feature. Specifically, we convert each confidence score vector obtained from one model into a pairwise relationship matrix, in which each entry characterizes the comparative relationship of scores of two test samples. Our hypothesis is...
GNSS signal simulators are developed to obtain specific GNSS signal for research on satellites navigation. High-order DDFS synthesizer is need to meet the demand of reconstructing the signal with high-order characteristic states when the GNSS signal is received by a receiver installed on a vehicle with high-dynamic motion. The signal state vector with proper orders to represent the high-dynamic motion...
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