In this paper, considering a multiuser multi-relay spectrum sharing cognitive radio system, the exact outage probability and diversity order for such a system are derived over Rayleigh fading channels. The theoret...
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In this paper, considering a multiuser multi-relay spectrum sharing cognitive radio system, the exact outage probability and diversity order for such a system are derived over Rayleigh fading channels. The theoretical analyses are validated by simulations. Both theoretical analyses and simulations show that the derived exact outage probability is accurate, and the diversity order is (M+1)N (where M is the number of relays and N is the number of users) for the selection decode-and-forward (SDF) protocol. It is indicated that both multiuser selection diversity and multi-relay selection cooperative diversity can be achieved simultaneously for SDF protocol in spectrum sharing cognitive radio systems.
The extraction of crack images is an important process in the area of structural health monitoring for determining the severity of the damage induced by cracks. In this paper, a radial basis functions (RBFs) based lev...
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The extraction of crack images is an important process in the area of structural health monitoring for determining the severity of the damage induced by cracks. In this paper, a radial basis functions (RBFs) based level set interpolation technique is proposed to extract the images of cracks in structures. In the proposed method, the level set in the form of radial basis functions with an ellipse constraint can represent accurately various shapes without requiring building interior and exterior layers for the sparse mesh grid of RBFs centers or using information on contour/surface normal. The initial distance function embedded in the ellipseconstrained RBFs can be interpolated on a much coarser grid. Its deformation is considered as an updating of the RBFs coefficients by solving an ordinary differential equation (ODE) and a non-convex quadratically constrained quadratic programming (QCQP). The use of a semi-definite relaxation technique in solving the non-convex QCQP problem has shown that initialization and re-initialisation are no longer necessary. The images of a number of cracks have been extracted using the proposed method. It has been shown that the proposed method can extract crack images efficiently with coarse grid of RBFs centers and is also less sensitive to the distribution of the crack images in the domain.
Continuous Data Protection (CDP) Technology, according to capturing and storing all the changed data, it has implemented to restore data at any history moment before a damage. As the technology Recovery Point Obje...
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Continuous Data Protection (CDP) Technology, according to capturing and storing all the changed data, it has implemented to restore data at any history moment before a damage. As the technology Recovery Point Objective (RPO) can be reduced to the lowest limitation, the key issues of which turns into recovery time objective (RTO). Upon the traditional backup and recovery strategy of the new data, it's proposed an increment-based method that makes backup and recovery as block map, effectively eliminate the redundant read and write operations in the process of data recovery, improve the efficiency of data recovery and reduce the recovery *** also presents the architecture of Continuous Data Protection system which has achieved by the abovementioned strategy in the paper.
Cloud's development has entered the practical stage, but safety issues must be resolved. How to avoid the risk on the web page ,how to prevent attacks from hacker, how to protect user data in the cloud. This p...
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Cloud's development has entered the practical stage, but safety issues must be resolved. How to avoid the risk on the web page ,how to prevent attacks from hacker, how to protect user data in the cloud. This paper discusses some safety solution :the credit level of web page;Trace data ,analyze and filter them by large-scale statistical methods;encryption protection of user data and key management.
Inspired by the particle swarm optimization algorithm, the global information is added to the adaptive harmony search algorithm. The Global adaptive harmony search algorithm is proposed in this paper. Then five cr...
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Inspired by the particle swarm optimization algorithm, the global information is added to the adaptive harmony search algorithm. The Global adaptive harmony search algorithm is proposed in this paper. Then five criteria are used to test the new algorithm. And its application to attribute reduction is given. The simulation result shows the effectiveness and feasibility of the algorithm.
At present, China has become one of the largest countries with electronic product output and consumption in the world. People have focused their attention on safely, reliably and effectively disposal of waste elec...
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ISBN:
(纸本)9781467306898
At present, China has become one of the largest countries with electronic product output and consumption in the world. People have focused their attention on safely, reliably and effectively disposal of waste electronic product. In this paper, considering protection of the environment and reduction of the cost, after elaborating the necessity of recycling electronic product, I analyze the present situation and problems of waste electronic product reclamation system, and put forward construction of waste electronic product reclamation system by the third-party logistics enterprise which is a solution to deal with these problems effectively. Finally I propose some measures to ensure successfully implement the reclamation system.
The development of mobile terminals, 3G and networks, has brought strong momentum and broad prospects to the development of applications based on mobile internet [1] [2J [3]. On the other hand, users hope to get the i...
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The development of mobile terminals, 3G and networks, has brought strong momentum and broad prospects to the development of applications based on mobile internet [1] [2J [3]. On the other hand, users hope to get the information they want at anytime, anywhere through mobile devices rather than relying on a PC. This paper puts forwards an e intelligent information integration system based on Android mobile devices. Using middleware technology [4][5), web service technology [6] and lightweight XML parsing technology, the system takes individual needs of customers as the center, setting up a "digital application of Mobile Box" for each user, providing users with a variety of mobile multimedia applications and service that meet personal needs. The intelligent information integration system has been realized on the Android platform, and runs well providing intelligent space for users' personalized service.
Nowadays, Network information securit y problem has been increasingly considered. There are a number of ways proposed to tackle this issue, such as dynamic programming algorithm, fuzzy-C means algorithm, but they ...
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Nowadays, Network information securit y problem has been increasingly considered. There are a number of ways proposed to tackle this issue, such as dynamic programming algorithm, fuzzy-C means algorithm, but they still have some disadva ntages, in this paper, we will use the genetic algorit hm to solve the security problem efficiently.
The OMAP-L138 application processor is a dual core SOC(ARM926EJ-S and C6478VIEW DSP) chip developed by the Texas Instruments. In the paper, the performance features of the OMAP-L138 chip is introduced and a design...
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The OMAP-L138 application processor is a dual core SOC(ARM926EJ-S and C6478VIEW DSP) chip developed by the Texas Instruments. In the paper, the performance features of the OMAP-L138 chip is introduced and a design scheme of the digital frame extractor based on the OMAP-L138 is proposed. The video input module and output module, the SATA hard disk module, the network module of the digital extractor are configured in detail. The application software design flow based on the hardware platform is proposed in the paper. The playback of the video data based on the network interface and LCD interface is designed. The image files stored in the SATA hard disk are transferred to the personal computer for broadcasting through the network. On the other hand, the image files can also be displayed through the LCD interface of the OMAPL138. Taking advantages of the ARM core and the digital processing capabilities of the DSP core, low power high -performance is exerted.
In this paper, we summarized the characteristics of the small-UAV airborne video. According to those characteristics we analyzed the difficulties and the key technology of electronic image stabilization based on t...
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In this paper, we summarized the characteristics of the small-UAV airborne video. According to those characteristics we analyzed the difficulties and the key technology of electronic image stabilization based on the small-UAV airborne video. And then a reasonable framework for real-time electronic image stabilization system of small UAV is presented to provide reference for small UAV video stabilization.
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