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Insulated Gate Bipolar Transistors (IGBTs) connected in series is an essential topology for high voltage applications where fast switching is required. However, the IGBTs are unlikely to share the voltage equally with each other due to many factors, such as various time-delays of control signals, different stray inductances in the circuit, and potential snubber effects [1]. Even if using identical...
The so-called image registration is to find an optimal spatial transformation such that the transformed template image becomes similar to the reference image as much as possible. Several partial differential equations (PDEs) based variational methods can be used for deformable image registration, mainly differing in how regularization for deformation fields[1]. Regularization techniques based on total...
Distributed imaging using sensor arrays has grown rapidly over past several years. Because image data is characterized by is high volume, an architecture of two tiered visual sensor network is proposed, where storage nodes gather image data from nearby sensors and process sink's query to transmit a time-specific image. However the importance of storage nodes is attractive to attackers. In this paper,...
In this paper, we propose a novel method that is capable of detecting and removing moving cast shadows robustly. Four properties of the moving cast shadows are observed. To make full use of the four properties, pixel level processing is adopted to extract the color, texture and luminance features of the moving foreground, and region level processing is introduced to detect shadows. Another innovation...
Space target recognition is an important topic to a country's space safety. Based on analyzing the characteristic of target space images, and combined with Discrete Wavelet Transformation, Singular Value Decomposition and Kernel Principal Component Analysis, a new method for space target recognition is proposed. Firstly, the detail sub-images are obtained by two-dimensional DWT of the original space...
Understanding the genotype-phenotype association is a fundamental problem in genetics. A major open problem in mapping complex traits is identifying a set of interacting genetic variants (such as single nucleotide polymorphisms or SNPs) that influence disease susceptibility. Logic regression (LR) is a statistical approach that has been proposed to model interactions of SNPs. Several LR-based association...
Reducing dimension processing is needed in feature samples because the repeated and secondary features would reduce the classification ability and increase computation complexity. In this paper, a feature selection method, named MPSO (Modified Particle Swarm Optimization), is proposed. The original group velocity of a particle swarm was changed into two separate and parallel particle swarm velocity,...
In this paper, an efficient algorithm for generating all optimal r-adic representations of a T-adic integer is presented. Our approach is to use a nondeterministic finite automaton (NFA) to produce all T-adic representations at first, and then combined with Floyd algorithm, we get the upper bound of optimal radic representations' length and some prerequisites used in the generating process of optimal...
With the rapid advances in grid technology, grid reliability becomes an issue of increasing practical concern and research attention. However, managing grid reliability is not easy due to the complicated, large-scale and dynamic natures. This paper studies the reliability problem of grid service imposed by software or hardware failures, and presents a new approach to analyze grid service reliability...
In this paper, one of the problems of linear discriminant analysis (LDA), that is, it pays more attention on minimizing the within-class scatter than on maximizing the between-class scatter, is treated. Though the weighted maximum margin criterion (WMMC) with an appropriate weighted coefficient can solve this problem, how to select this coefficient automatically is still difficult as most of previous...
A fast and effective fade detection algorithm is proposed in this paper, which directly operates in compressed domain and suitable for real-time implementation. By analyzing the prediction directions of B frames, which are revealed in the macroblock types, the candidate fades can be found. Then, uncommon intracoded macroblocks of the P frame can be applied as an indicator of fade. As a result, locating...
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