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Adopting Bayesian network (BN) as the effective framework for representing and inferring dependencies and uncertainties among variables, in this paper, we established a BN-based model to discover user similarities in social networks. First, we built a BN to describe the direct similarity relationships between users, called social user BN and abbreviated as SUBN. Second, we proposed a distributed storage...
After rendezvous and docking, the mass and mass center of target satellite can change greatly. In order to identify the mass and mass center of target satellite, research is made about the identification of mass and mass center about target satellite. As to the mass of target satellite, according to the information when the tracking satellite is located in different relatively stable position with...
Online social networks have recently become an effective and innovative channel for spreading information and influence among hundreds of millions of end users. Most of prior work either carried out empirical studies or focus on the information diffusion modeling in temporal dimension, little attempt has been given on understanding information diffusion over both temporal and spatial dimensions. In...
Network coding is a new proposed way for data transmission over networks, allowing each intermediate nodes to perform encoding. This transmission scheme, totally different from traditional routing one, was proved to be able to obtain larger capacity, higher efficiency, robustness and security for the network. In this paper, we focus on certain security issue, give an overview for network coding, and...
Focusing the optimal two-impulse transfer for fly-around orbit reconfiguration, an near optimal two-impulse analytical algorithm is presented by the CW equation and its solution. To avoid the singularity aroused from the normal whole solving method by CW equations, the paper calculates the out-of-plane optimal algorithm and in-plane optimal algorithm respectively in the deduction process and then...
This paper establishes the test models of individual effect and joint effect of the futures price volatility determinants on the basis of GARCH(1,1) model, and takes example for Wheat futures, and analyses empirically the relationship of futures price volatility and time to maturity, of futures price volatility and the day of week, of futures price volatility and volume and open interest. the study...
The aim of this paper is to propose a method for priorities from fuzzy complementary judgment matrix, which can be either consistent or inconsistent. In the method, firstly, based on property of fuzzy complementary consistent judgment matrix, the deviation term is introduced and deviation function is constructed. Then, in order to minimize the inconsistency of fuzzy complementary matrix, mathematical...
Differential evolution (DE) and particle swarm optimization (PSO) are the evolutionary computation paradigms, and both have shown superior performance on complex nonlinear function optimization problems. This paper detects the underlying relationship between them and then qualitatively proves that the two heuristic approaches from different theoretical background are consistent in form. Within the...
Image denoising, as a low-level step of image processing, is perhaps the oldest and still active research topic. A general formulation based on the variation of digitalized energy to denoise image is proposed in this paper. This method is different from classical variational method employed in image processing. For a digitalized energy functional, we first compute the variation, then design algorithms...
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