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Study on the thermal process in repetitively operated electron beam collectors of relativistic backward wave oscillators is proposed. Using Monte Carlo method, the energy deposition of the beam was calculated. With energy deposition as the internal heat generation, numerical model of thermal process in collectors was estimated in finite element method. Temperature development was obtained and compared...
Fire accidents are one of the major problems facing ship, ship fire specific gravity of shipwreck increases year by year. Toxicity and high-temperature of smoke produced in fire is responsible for most of the fatalities. In order to improve the technical level of emergency during ship fire, grope for methods to describe the spreading rule of ship fire and smoke, in this research a novelty simulation...
In order to resolve the problem of loading mass terrain data in airborne radar real beam ground map (RBGM), multi-resolution terrain database and data loading tactic is designed, which meets the demand of terrain resolution in different range and reduces the system memory consumption. By using and optimizing Terrain defilade algorithm which is fit for far distance condition, whether a ground echo...
According to the commonly used foundation building grounding way to reduce grounding resistance of experience, the paper put forward to shore power grounding device grounding electrode can adopt Foundation Grounding mode. On the basis of the grounding resistance of the ANSYS simulation, with the vertical grounding electrode resistance calculation results compared to determine the basis of grounding,...
Orthogonal frequency division multiplexing is an efficient modulation technology, its basic idea is to distribute the serial high-speed data stream to the quadrature sub-carriers, and to transmit parallel. The synchronization is the key problem in OFDM reliability engineering. In this paper, OFDM reliability engineering model is provided, the synchronization problem is analyzed in details, the description...
The heat pipe-radiator is a complex nonlinear system and may be prone to instability and oscillatory behaviour. In this paper, a fuzzy controller is designed and simulated exclusively to control it with a new-type function of contraction-expansion factor. It is applied successfully in decreasing temperature undulation and energy wasting by matlabl.
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