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The chiller system in a building accounts for the main part of the building's total energy consumption, so it is critical to optimize the operation of chiller system for the purpose of saving energy. A chiller system generally consists of evaporation side and condensing side. The condensing side includes chillers, cooling water pumps and cooling towers, which form a subsystem of cooling water. It...
As a quick access recorder (QAR) loaded on the plane, QAR data records hundreds of parameter data produced in the process of flying. But these data are not currently being used effectively. It is becoming increasingly necessary to use QAR data for fault prediction. First, the technical route of the civil aircraft fault prediction is illustrated. Second, four fault prediction methods of civil aircraft...
The study of single and bistatic radar scattering characteristics on stealth aircraft, for the future of collaborative detection on aircraft swarms is of great significance. Based on the characteristics analysis of stealth aircraft, using the software FEKO to establish stealth aircraft model, focusing on simulation research in different polarization ways, single and bistatic radar static RCS, through...
The atmospheric environment is facing increasing threats from industrial pollutions. This paper presents an air pollution source estimation algorithm using mobile sensor networks. We propose a continuous point source model of pollution under windy conditions. Then we use quadrocopters which equipped with sensors that can detect pollutants to collect concentration information. Based on the collected...
Vega software is widely used for infrared simulation. This study proposes a method for evaluating the effect of infrared objective stealth based on Vega software combined with image feature point matching technique. Vega software is used to simulate a group of infrared images before and after target stealth. Afterwards, feature points are acquired from the target images. Hausdorff distance between...
Trajectory tracking problem of reconnaissance and attack UAV is considered in this paper. Arch circle is introduced before the turning point of the flight route to keep good reconnaissance and attack purpose. Trim, small disturbance and linearization techniques are applied to the ontology mode of the UAV. By analyzing the dynamical character of pitching mode, rolling mode and Dutch Roll mode, the...
Air brake chamber, as the implementation component of anti-lock braking system in vehicle, its dynamic characterizations are important to the performance of the entire brake system. It based on the analyzing the theory of air brake chamber, to verifies the empirical formula through the method of FDD heuristic search and fitting the parameters of the formula that to be determined on the method of least...
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