In this paper, we provide a generalized file replication scheme with a storage load balancing function in unstructured P2P file-sharing networks. The generalized file replication scheme is expressed as a weighted mixt...
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In this paper, we provide a generalized file replication scheme with a storage load balancing function in unstructured P2P file-sharing networks. The generalized file replication scheme is expressed as a weighted mixture of the concepts introduced in existing schemes. A mathematical analysis shows that the system behavior realized by the generalized file replication scheme can be described by a thermal diffusion equation composed of heat, reaction and diffusion terms, the weights of which are controlled by a parameter of the mixing rate. Here, the heat term represents a function to enhance file search performance by making replicas on specific peers. The reaction term represents a function to avoid concentrations of storage loads on specific peers. The diffusion term represents a function to uniform the storage loads among peers. The simulation results show that the generalized file replication scheme enables us to control the trade-off between search and storage load balancing performances extensively and intuitively by controlling the parameter of the mixing rate. In addition, the simulation results show that the generalized file replication scheme can adapt to dynamic P2P file-sharing environments.
Based on approximately solving diffusion equation in node, a series of reconstruction methods are developed for NGFMN code. These methods are categorized by hyperbolic functions, boundary conditions and the order of L...
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Based on approximately solving diffusion equation in node, a series of reconstruction methods are developed for NGFMN code. These methods are categorized by hyperbolic functions, boundary conditions and the order of Legendre polynomials utilized in equation solving. 2D IAEA and 2D BIBLIS benchmarks have been solved. The numerical results are compared with those from CITATION, and the reconstruction method with smaller errors is selected.
Although biometrics technology has progressed substantially, its performance is still to be improved for real applications. This paper aims to improve the accuracy of personal identification, when only single sample i...
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Although biometrics technology has progressed substantially, its performance is still to be improved for real applications. This paper aims to improve the accuracy of personal identification, when only single sample is registered as template, by integrating multiple hand-based biometrics. To make fusion much easier, the same feature, so called fusion code, and decision level fusion strategy are used. Two fusion cases, face & palmprint and FKP & palmprint were taken as examples to verify the effectiveness. Experimental results show that much better performance than single modal biometrics has been achieved.
Many applications and related studies of solar energy have been focused on guiding sunlight into the indoors for illumination purposes. To achieve this objective, one of the approaches is the use of a high efficiency ...
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This paper puts forward the initial dimensions and items' formation the indexe system for logistics service quality based on the perceived value of customers that logistics suppliers provide service quality, inter...
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ISBN:
(纸本)9780784410394
This paper puts forward the initial dimensions and items' formation the indexe system for logistics service quality based on the perceived value of customers that logistics suppliers provide service quality, interview information from logistics enterprise and expert opinion. Then the index system is simplified according to correlation value and four quadrants. The evaluation model and the quality house basde on relationship between these factors. Finally, the pertinence measure is put forward in order to improve logistics service quality and the whole benefit of the logistics suppliers. Copyright ASCE 2009.
In thremmatology, many researches focus on ecological illumination for improving the growing speed of animal or plant. According to the Trichromatic theory, any specific color can be made up of red, green, and blue li...
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Due to the energy crisis, the principle of green energy gains popularity. This leads the increasing interest in renewable energy such as solar energy. How to collect sunlight for indoor illumination is our ultimate ta...
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Light Emitting Diode, LED, has many advantages in many lighting applications, such as general illumination, street light, and auto lamp. In general, each application needs to do secondary optical design for its specif...
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Recently, many researches focus on healthy lighting with sunlight. A Natural Light Guiding system includes collecting, transmitting, and lighting parts. In general, the lighting module of the Natural Light Guiding Sys...
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Recently, many researches focus on illumination with sunlight for saving energy and healthy lighting. A Natural Light Guiding system has collecting, transmitting, and lighting parts. In most systems, the paths on tran...
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