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International Reference Ionosphere (IRI) and ray tracing principle were introduced firstly. The group ranges in the mid-latitude region of China were simulated with ray tracing algorithm in the IRI model. The distribution characteristics of the group range were analyzed with hour, ground distance and carrier frequency. The change laws of the group range were obtained. It indicates that the change...
This paper considers the case of manufacturers recycling used products, with recycling quality random. The recycling price should be controlled through the introduction of value coefficient of quality. The high-quality remanufactured products market and the lower one coexist, and separate. Create two pricing models to compare, one with a single recycling price, and the other taking recycling quality...
International Reference Ionosphere and ray tracing algorithm are discussed in the paper. Three-dimensional real-time ray tracing method is illustrated In accordance with International Reference Ionosphere, ray tracing equations are resolved by Runge-Kutta method. Based on International Reference Ionosphere and ray tracing algorithm, the three-dimensional ray tracing simulation software is presented...
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