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In this paper, we propose a novel image representation for scene classification. Firstly, we model multiple order statistics of image patches via Gaussian Mixture Model(GMM) in a Bayesian framework. Secondly, we combine the information of mean and covariance of the GMM and represent it as a mean-covariance supervector through a new distance metric.(More)
In order to solve the disadvantage of current ant colony optimization algorithm (ACO) which easily plunged into local optimal in dealing with Multi-Satellite Scheduling Problem (MuSSP), a hybrid ant colony optimization algorithm (HACO) is proposed. In this method, the ACO algorithm is served as a global search algorithm. According to the characteristics of(More)
Development of intelligent fault detection and diagnosis technologies for spacecraft is one of important issues in the space engineering. In this paper, we present a new fault detection and diagnosis approach for spacecraft based on Principal Component Analysis (PCA) and Support Vector Machines (SVM). Firstly, PCA is used to extract features from input data(More)
This paper proposes a new SVM-based method for text-independent speaker verification using derivative kernel in the reference Gaussian mixture model (GMM) space. The model for speaker utilizes the power of SVM and GMM, reference GMM used first, and then SVM followed. Using the reference GMM, not only clusters and compacts the speech, but also distinguishes(More)
A few literatures on the maintenance strategy (MS) decision making have been found. Moreover, they never deal with the case that the most appropriate MS is selected for a machine when two kinds of evaluations of each MS are considered: deterministic or fuzzy in relation to each evaluation criterion (EC). In order to resolve the problem, ELECTRE III based on(More)
This paper aims at the rescheduling of observing spacecraft imaging plan under uncertainty using ant colony algorithm. First, this paper provides a brief analysis about the uncertainties in spacecraft observation scheduling. And then, this paper establishes the mathematical model and manages to solve the rescheduling problem by ant colony algorithm.(More)