نتایج جستجو برای: excess path loss
تعداد نتایج: 645157 فیلتر نتایج به سال:
We consider a method for developing radio-wave propagation prediction model in mountainous forested area. A new path loss development approach uses free-space (FSPL) and an empirical model. To improve the accuracy, transmission distance, free space area, forest area were calculated separately. obtained distance areas from digital surface (DSM), which represents elevation information, including ...
This paper presents new empirical prediction models for loss estimation in forest environment. Experimental investigations were carried out on groups of trees form woodland and lines at SHF band under different operational contexts. In the experimentations, two major measurement geometries (propagation “into” propagation “inside” forest) adopted site to basis. Results from all sites displayed a...
We report path-integral Monte Carlo calculations of the kinetic energy of condensed lithium for several temperatures in both the solid and liquid phases. The excess kinetic energy of lithium decreases from about 10.4% of the classical value at 300 K to 3.2% at 520 K indicating a very slow decay with temperature. A Wigner-Kirkwood perturbation treatment of quantum effects to order \ gives a sati...
OBJECTIVE Body contouring surgery has become a steadily increasing part of weight loss treatment in the population of patients electing to undergo bariatric surgery. This study aims to elicit factors that can be used to prognosticate which bariatric surgery patients will choose to undergo body contouring procedures. METHODS A database of 381 patients who underwent gastric bypass surgery betwe...
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