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In order to reduce the impact of current and voltage effectively, when the dual-mode inverter grid-connected/off-grid mode transfer in the micro-grid system. There is a uncontrollable parameter perturbations influence in the transfer process of grid-connected/off-grid. This paper presents micro-grid dual-mode inverter which take H∞ robust controller in current inner loop, reducing external disturbances...
For Micro-Grid in islanded operation, due to the effects of mismatched line impedance, the real and reactive power could not be shared accurately with the conventional droop control method, which would likely cause circulation current problems. Generally, the real power sharing is achieved by P-f droop control equation and the reactive power by Q-V. This study present an improved scheme for adaptive...
Micro-Grid with hybrid energy systems is essentially a muti-objective, muti-constrant problem, and it is a challenge that Micro-Grid system to achieve optimal economy and stability of the system. An improve PSO-based energy management under two-time scale is proposed in this paper to accomplish this task. Based on different time scales, the energy manegement consists of day-ahead scheduling and real-time...
Stability and H-infinity optimal control of nonlinear networked control systems (NNCSs) with distributed delays and disturbance are studied in this paper. We develop a hybrid Takagi-Sugeno fuzzy model for nonlinear plant interconnected with continuously dynamic output feedback controller. Sufficient conditions are derived by constructing Lyapunov-krasovskii functional, which insure that the system...
In order to improve the efficiency and accuracy of warship target detection in sea-sky background,and according to the obvious gray scale contrast between the sky region and the sea region, this paper operate the division of the two regional context by looking for low-water mark of the histogram's Valley, which is one feature of the histogram called "Two Peaks and a Valley". Then the method...
Aim at the problem of sea-sky-line detection in sea-sky background image, a new method which is based on histogram analysis and linear fitting is proposed. It can obtain the information of pixels near the Sea-sky-line through an analysis of the histogram, and calculating the rough area to get rid of irrelevant pixels in order to extract the sea-sky-line through the method of linear fitting. The experimental...
This paper researched scale invariant feature transform (SIFT) which is feature extraction method of image processing, and it is stable for image feature registration. And image mosaic needs the fusion of overlapped region after the image registration. The research of image fusion in mosaic nowadays is concentrated on multi-resolution mosaic simply, and ignores the similarity of feature points among...
A de-noising method using wavelet transform and morphology for low light level image is presented. The intensity of noise field is different from the intensity of normal image region, which has reduce the quality of vision and after works of image processing such as segmentation, feature extraction and identification. Since there are a number of noises in low light level image, this paper did some...
The properties of the LDPC (low-density parity-check) error-correcting codes are bearing down on Shannon limit, but it also needs to solve the problem of reducing the complexity of decoding as much as possible in practical applications. A new type of (1008, 3, 6) rules LDPC decoder was introduced in this paper. It adopted the min-sum-plus-correction-factor decoding algorithm and part parallel structure,...
Mobile ad hoc networks possess the following features: open transmission medium, dynamic topology structure, acentric management and distributed cooperation, and so on. Therefore, Ad Hoc Networks have high practical value, while at the same time it is difficult for which to guarantee the routing security, which is the most important component of the entire network's security, it is also a difficult...
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