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This paper presents a fast discrete Curvelet transform (FDCT)-based technique for multi-focus image fusion to address two problems: texture selection in FDCT domain and block effect in spatial-based fusion. First, we present a frequency-based model by performing FDCT on the input images. Considering the human visual system characteristics, a union of pulse coupled neural network and sum-modified-Laplacian...
It has been demonstrated that a finite mixture model (FMM) with Gaussian distribution is a powerful tool in modeling probability density function of image data, with wide applications in computer vision and image analysis. We propose a simple-yet-effective way to enhance robustness of finite mixture models (FMM) by incorporating local spatial constraints. It is natural to make an assumption that the...
This paper proposes an effective method to balance the confliction between higher steady-state precision and stronger robustness in sliding-mode control systems. Based on the relationship between steady-state precision and sliding-mode surface parameters, three sliding surfaces are used in the design of sliding-mode control (SMC). The first and the second sliding-mode surfaces are mainly responsible...
A possibilistic clustering algorithm called unsupervised possibilistic clustering (UPC) was proposed in a previous paper. Although UPC is sound, the algorithm has the problem of generating coincident clusters. In this paper, we propose a new clustering model called improved unsupervised possibilistic clustering (IUPC) to overcome this weakness of UPC, and an efficient global optimization technique-differential...
Several different control algorithms for high-order inertial system were researched recently in China. Since different algorithms have similar effects, the consistency of these algorithms was first proposed in this paper in the view of control principle. The superheated steam temperature system of a 600 MW unit was taken as an object. The characteristics of time domain and frequency domain, spectrum...
Investment in R&D spawns innovations, which in turn, foster economic growth. In recent years, researchers have become increasingly aware of the impact of corporate governance on innovation. We examine the relation between research & development (R&D) expenditures and a governance index that contains various antitakeover and shareholder protection provisions. Using a broad based measure...
The system often has time-delay phenomenon in actual industrial process. In order to avoid the effect of time delaying on the system stable robustness and suppression on disturbance capability, based on the good track ability of the feed-forward control and the control superiority of the internal model control (IMC) on the the time-delay system, a internal model control method based on the feed-forward...
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