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Parametric probability models are common references for channel characterization. However, the limited number of samples and uncertainty of the propagation scenario affect the characterization accuracy of parametric models for body area networks. In this paper, we propose a sparse nonparametric probability model for body area wireless channel characterization. The path loss and root-mean-square delay,...
This article considers extended warranty decisions in competing dual-channel supply chains and uses game theories to analyze three model. We also discuss scenarios when the manufacturer provides the extended warranty and when the retailer does in each model. Our analysis reveals that: 1) In model MR, scenario MR-R outperforms MR-M for the manufacturer, the retailer and the whole system. 2) In model...
We consider a two-period production and pricing model under a coupon recycling environment, in which a monopolistic manufacturer is able to produce and sell new, remanufactured and upgraded products simultaneously in the market. To attract consumers to return used products and promote the sale of upgraded products, the manufacturer offers coupons in the recycling process. We focus on the competition...
The propagation characteristic of highway communication is investigated by using FDTD/ray-tracing method numerically. To achieve the accurate radiation characteristics, much tinier mesh size of FDTD and ray-tracing method are employed. Take the complicated environment in the inter-city highway into consideration, tunnel with leaky coaxial cable, antenna and sensors are included to realize the propagation...
In recent years, the nonlinear analysis of electrocardiogram (ECG) signals using multifractal theory has been proved to be effective. In order to further study the sensitivity of the multifractal analysis in distinction between normal and pathological ECG signals, drugs experiments were conducted on mice. Mice received various drugs to imitate different physiological and pathological conditions, and...
A coplanar waveguide (CPW) fed circular ring ultra-wideband (UWB) monopole antenna with two notched functions is presented numerically. The impedance bandwidth of the proposed loop antenna is broadened by cutting two arc-shaped tapered in the CPW ground plane. Two stop frequency bands are obtained by inserting three microstrip slot-stubs in the inner of the proposed circular ring patch. The two notched...
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