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In recent years, SAR is developing to multitemporal, multi-band, high resolution and full polarization. So the study of polarization SAR change detection technology is the trend of the SAR. The traditional change detection methods have disadvantages either low accuracy, serious noise or can't determine changes types. In order to improve the detection accu-racy of polarization SAR data, a new change...
This article studies a paper cutting platform in a comprehensive approach to folk art, folklore, communication, computer and information science focusing on paper-cut in Hebei China. The main content includes: 1) the data collecting and recording of the scattered Chinese folk paper-cut work in Hebei, 2) the digitization, optimization, compression, classification, icon and pattern extraction, vectorization...
The paper optimizes AVS key coding algorithm, and designs high coding efficiency and high coding quality AVS encoder XAVS based on x86 platform. It supports IPPP, IBBP structure, films on a variety of formats of media sources to AVS compression, rate control, rate distortion optimization, and packaged into the standard TS stream. The experiment results show that subjective quality of XAVS is better...
Taking the case of Shenyang Agriculture University, based on the 3D scene creation process as the reference, this essay elaborates the process and methods of the creation of 3D virtual scene and 3D roaming system in such three aspects as data collection, methods of 3D scene creation, and scene integration. The innovation of this essay is the modeling optimization running through the entire modeling...
Virtual reality technology has become a main research field of computer development application gradually in recent years. Virtual campus is a specific application of virtual reality technology in the digital campus. The basic principles and key technologies of building virtual campus model are studied in this paper. According to the requirements of virtual reality, virtual campus 3D models are established,...
Traditional genetic algorithm is advanced methods in solving complex nonlinear optimization problems at present, but exists its own defection such as local convergence. To solve the issue, considering chaotic algorithm's randomness, ergodicity, regularity and strong sensitivity of changes to the initial value which base on the robot path planning problem. From this perspective, the paper conducts...
From the avoiding collision angle of multi-ships encounter, this paper applies target decomposition- coordination method of large-scale systems theory to decompose the anti-collision turning into multiple independent sub-problems of optimization between the ship and multi-ships, and by use of coordinator we can calculate this ship's optimal turning angle to avoid collision. The simulation result shows...
In this paper, we analyze performance of cooperative spectrum sensing under counting rules when exponential model involving the spectrum usage (SU) is utilized to characterize the burst nature of primary user (PU) link. Considering both the reliability and the efficiency performance of sensing, we use the average error probability (AEP) in final decision making as metric. We derive a closed-form expression...
A new robust speech recognition method combining adaptive filtering based on a variable-step LMS algorithm and perceptual linear prediction cepstral estimation is proposed. The variable-step LMS algorithm is realized by optimizing the non-linear relation between step size and mean square error. The perceptual linear prediction cepstral extracted from the enhanced speech is used for generating the...
The problem of the design of p-cycles in WDM mesh networks under single link failure scenario has been extensively investigated; however, there are very fewer studies upon the design of p-cycles for protecting against a single node failure. In this paper, we develop a new scalable design approach for calculating p-cycles with node protection capability. Conventional design methods formulate the problem...
We transform the geometric constraint solving into the numerical optimization solving. A new hybrid algorithm is proposed which combines the merits of global search of the Particle Swarm Optimization Algorithm (PSO) and self organized capacity of ant algorithm. This algorithm uses PSO to search the area where the best solution may exist in the whole space, and then performs fine searching. When the...
In this paper, we presented a new hybrid particle swarm optimization algorithm which is used to design the control unit of an adaptive polarization mode dispersion compensation. Comparing with the conventional particle swarm optimization algorithm, the new algorithm converges to the global optima much faster than the conventional particle swarm optimization algorithm. Experiments show that the new...
This paper studies a man-made target extraction technique using SVM (Support Vector Machine) method from high resolution PolInSAR(polarimetric Interferometric synthetic aperture radar ) data. Fully polarimetric interferometric data in X band was acquired by a China-made airborne SAR system in January 2010, over the Linshui area in Hainan province. This study focuses on man-made targets extraction...
Based on the concurrent communication tree model, considering the network node communication capability and the communication weights between nodes, according to the importance of the number of node joints (NNJ) and communication weights, this paper proposes the weight first (WFI) communication tree algorithm and the NNJ first (JFI) communication tree algorithm respectively. The results, compared...
Psychoacoustic models are the key element of MUSIC-AM audio encoding, and its DSP implementation involves a lot of computations. So whether the real-time audio encoding can be implemented using DSP mainly depends on the execution time of psychoacoustic models algorithm to a large degree. In this paper, we give a brief introduction of psychoacoustic models at the first, and then discuss its implementation...
The central idea of cross-layer design is to optimize the control and exchange of information over multiple layers to achieve significant performance improvements by exploiting the interactions between various protocol layers. In order to maintain the advantages of the existing layered architecture and to preserve the modularity of protocol stacks to the great extent possible, a novel cross-layer...
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