In this paper, we explored how to more accurately predict the quality of high-frequency links and better research improve capabilities communication, reconnaissance, positioning systems. Based on background electron density generated by ionospheric assimilation model 3D ray-tracing technology, realistic accurate channel parameters with physical meanings were obtained. On basis, a complete that ...

The proliferation of technologically advanced and mobile devices poses risks to public safety security. These threats can be mitigated by systems equipped perform timely identification tracking their operators. In pursuit these capabilities, we propose an automated sensing platform designed specifically for multiple, radio frequency (RF) targets. There are a number challenges involved with mult...

Established mathematical techniques to model the energy density of high-frequency waves in random media by radiative transfer equations and to model the small mean-free-path limit of radiative transfer solutions by diffusion equations are reviewed. These techniques are then applied to the derivation of radiative transfer and diffusion equations for the radiance, also known as specific intensity...

The higher frequency transient signals generated as a result of a power system fault or disturbance provide the basis for an alternative approach to power system containing connectors and cables result in unsuitable operation of the system. However one major challenge is the need to ensure that the transients to be neutralized by electromagnetic compatibility (EMC) issues and cabling routes. T...

This project proposes an area detection system using Radio Frequency (RF) technology to monitor forest areas for illegal logging or encroachment activities. The consists of a network RF sensors deployed throughout the detect any movement changes in forest's environment. data collected by is transmitted wirelessly central monitoring station, where it analyzed machine learning algorithms. propose...

many health studies were interested to find the association between multiple predictors with a dependent variable. the popular method to analyze these studies was multiple regressions that assumed the predictors were independent. while in practice some predictors may depend on each other and they could not be presented in a regression model simultaneously, as a result the appropriate models suc...

Spin transfer torque and spin pumping are central reciprocal phenomena in spintronics. The author demonstrates a way to understand these effects within quantum out-of-equilibrium path-integral model. At finite temperature, frequency, or accumulation, the magnet also experiences fluctuating torques. In regime, transport coefficients related electron shot noise caused by discrete angular momentum...

A combined active/passive modeling system that converts CloudSat observations to simulated microwave brightness temperatures (TB) is used to assess different ice particle models under precipitating conditions. Simulation results indicate that certain ice models (e.g., low-density spheres) produce excessive scattering and implausibly low simulated TBs for stratiform precipitation events owing to...