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In this paper, we apply access class barring (ACB) scheme and sparse code multiple access (SCMA) technique to massive machine type communication devices (MTCDs) communications, and propose a resource allocation scheme to increase the number of successful accesses. The proposed scheme employs ACB to control the number of massive random access (RA) attempts during preamble transmission in physical random...
To discusses the rule of heat transfer during the skin burns and the relationship between the depth of skin burns and action time, this paper used the heat transfer theory to set up the skin burns heat conclude model of one-dimension unsteady state infinite objects. By the MATLAB software, the skin burns process temperature distribution has been numerical calculated. The simulated gave the affected...
This paper adopts the method of Fluent software simulation and simulates research the thermal performance of a solar air collector's with porous and fold lined. Changes in the structure of the collector plates whether the openings, folded plate and the plate hole collector aspects to impact performance are discussed. In order to have comparable, to simulate in the intensity of solar radiation, wind...
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