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Aim at the problem of road transportation security, this paper uses a clustering method to deal with the vehicle data collected by GPS equipment. From the GPS real-time supervisory data, we could explore the locations with overspeed density higher than the threshold and create the overspeed points cluster at maximum density value. Those sections with density higher than this maximum value are overspeed...
China is an earthquake-prone country, and it is also one of the most serious earthquake disaster countries in the world. Establishment and improvement of earthquake disaster mitigation systems, integrating existing earthquake information and avoiding islands of information, has great significance to reduce the adverse impact on the country and the people. A more complete architecture of the earthquake...
To solve the problem of fault diagnosis for engine, due to the complexity of the equipments and the particularity of the operating environments, generally speaking, there is no one-to-one correspondence between the characteristic parameters and status, so, the methods of diagnosis are very complicated. A novel fault diagnosis method based on empirical mode decomposition (EMD) and wavelet packet BP...
The solid-liquid two-phase flow equations of the draining-sand jet pump have been established according to the RNG k-?? two-equation turbulence model. On this basis, the numerical analysis models of different diameter fitting of the nozzle and the throat were established .Then, the characteristics of efficiency and outlet pressure of the diffuser and solid phase ratio and velocity field distribution...
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