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The weighted coefficient in combination forecasting model is constant in most of current studies. In fact, if the weighted coefficient is assumed to be constant, the effectiveness and accuracy of combination forecasting model may be unsatisfied. In addition, samples near the time now should be greater contribution to prediction. Taking into the account of the above reasons, a new combination forecast...
The end-to-end throughput of a route in Cognitive Radio Network (CRN) is related to three factors: rate of links which consist of the route, channel diversity in the route and the primary usage pattern. In this paper, we considered all these factors together. Firstly, we analyzed the capacity of the individual CR link after considering the primary usage pattern. Then, we carefully investigated the...
We consider the following correlation k-clustering problem: given a graph with real-valued edge weights (both positive and negative), extend a k-clustering of some vertices to partition all the vertices into clusters so as to maximize the total absolute weight of cut negative edges and uncut positive edges. This problem for general graphs is NP-complete for all fixed k ges 2. We present polynomial...
Recent work has demonstrated that readings provided by commodity sensor nodes are often of poor quality. In order to provide a valuable sensory infrastructure for monitoring applications, we first need to devise techniques that can withstand "dirty" and unreliable data during query processing. In this paper we present a novel aggregation framework that detects suspicious measurements by...
For several decades, the output from semiconductor manufacturers has been high volume products with process optimisation being continued throughout the lifetime of the product to ensure a satisfactory yield. However, product lifetimes are continually shrinking to keep pace with market demands. Furthermore there is an increase in dasiafoundrypsila business where product volumes are low; consequently...
The dramatic increase in leakage current, coupled with the swell in process variability in nano-scaled CMOS technologies, has become a major issue for future IC design. Moreover, due to the spread of leakage power values, leakage variability cannot be neglected anymore. In this work an accurate analytic estimation and modeling methodology has been developed for logic gates leakage under statistical...
Continuous scaling, necessary for enhanced performance and cost reduction, has pushed existing CMOS materials much closer to their intrinsic reliability limits, forcing reliability engineers to get a better understanding of circuit failure. This requires that designers will have to be very careful with phenomena such as high current densities or voltage overshoots. In addition to the reliability issues,...
The rotational hysteresis loss of MP tapes was analyzed in order to evaluate the magnitude of the magnetic anisotropy of metal particles and to clarify the effect of the degree of preferred particle orientation on their magnetic properties. Taking account of the magnetostatic interactions among particles, it is shown that the mean value of the magnetic anisotropy of metal particles is 7.7 kOe. Furthermore,...
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